Refrigeration and freezing walk-in cooler is generally divided into refrigeration and freezing, and the other is that refrigeration and freezing can be carried out at the same time. According to customer needs, it can be divided into different refrigeration rooms, mainly using water in solid-liquid phase change Release or absorb a large amount of latent heat at a time. At the same time, the large amount of latent heat released during freezing is used to maintain the fruits and vegetables in the warehouse from freezing damage; in summer, the ice is used as a cold source to maintain the necessary low temperature and high humidity conditions for fruit and vegetable storage.

　　refrigeration and freezing walk-in cooler work defrosting is a refrigeration cycle, and heating is before defrosting. The principle of the freezer is: Freon absorbs heat from the outside and releases it into the room during the summer cooling. . At the same time, the hot air blown from the indoor unit during heating in winter, and the cold air blown from the outdoor unit, each manufacturer does everything possible to reduce the attenuation to the maximum level. Especially for fluorine system machines, this is not to say that fluorine system machines are not good and therefore must be defrosted. Have owners who have done fluorine system central air-conditioning find that when heating in winter, the indoor unit suddenly stops turning and sometimes it can still hear The machine has a   clicking   sound. The walk-in cooler water unit has a small temperature difference between the inlet and outlet water, and the indoor unit has a large air volume. And in winter, there will be no dry feeling like the fluorine system machine because of the high evaporation temperature of On Leon. It can play a great role in heating and defrosting. When the water unit is defrosting, let's talk about the heating of the water unit. Larger water units generally use two compressors.

　　 refrigerated and frozen walk-in cooler thermostat is a product designed for freezing walk-in cooler, etc. It has a beautiful appearance. The panel is separated from the control box and can directly drive a 2HP compressor. The user and manager menus are separated, which is convenient for ordinary users to simplify operations, while allowing managers to flexibly deal with different equipment conditions. The main products include microcomputer temperature and humidity controllers, temperature (data) recorders, embedded temperature display meters, refrigeration unit electrical control boxes, digital thermometers and hygrometers, intelligent halogen leak detectors, and more than 300 models in six series, which are widely used in food Cold chain, medical cryogenic equipment, HVAC, aquarium equipment and other industries. Refrigeration and freezing walk-in cooler is a product specially designed for freezing walk-in cooler, etc. It has a beautiful appearance. The panel is separated from the control box and can directly drive a 2HP compressor. The user and manager menus are separated, which is convenient for ordinary users to simplify operations, while allowing managers to flexibly deal with different equipment conditions.

　　The walk-in cooler has a wide range of uses, from supermarket food to industry to medical care. According to different cooling effects and use environments, walk-in coolers have their own structure and principles.

The internal principle of freezing and refrigeration is relatively simple: the moment it enters the freezer-refrigerator, the potential for low-temperature freezing and refrigeration is endless: more and more frozen and refrigerated products are sold in small pieces. Convenience store display cases all use distributed freezing and refrigeration. Liquid nitrogen boils and carbon dioxide sublimates. The energy (heat) required for this process is obtained from the food, which causes the food to be cooled and eventually frozen.

　　The preservation of tea is very important. The main factors that cause the discoloration and deterioration of tea are temperature, moisture, air and sunshine, and new teas have been launched one after another. Therefore, we need to learn how to keep the tea fresh with the display cooler in the supermarket. In addition, peculiar smells can also cause qualitative changes. Oxygen in the air is the main cause of tea decay. High temperature and humidity accelerate the oxidation and decay catalysts. Deoxygenating preservatives can inhibit the oxidation of tea leaves. Therefore, if used properly, you can get good results. refrigerated showcase supermarket display cooler has the function of refrigerating or freezing, suitable for storage of different items, embossed aluminum plate material is used in the cabinet, which is corrosion-resistant and easy to clean, and does not pollute food. The side plate is powdered galvanized steel plate, which is convenient for cleaning It is durable, mechanical temperature controller, convenient adjustment, stable temperature control, integral polyurethane foam, unique sealing design, safe, power-saving and beautiful.

　　Supermarket display cooler The deoxidizing preservative depends on the amount of tea packaging. It is best to squeeze out the air when the tea is sealed, and the operation is in place: the preservative can be placed on the tea bag. It must be sealed and airtight. If the air leaks, the effect will be lost. After using the remaining preservative, the outer packaging bag should be sealed immediately, otherwise the preservative will absorb oxygen and heat and reduce the use effect. For the storage period of less than six months, the supermarket display cooler is the most economical and effective to maintain 0-5 degrees Celsius; for the storage period of more than half a year, freezing (-10 to -18 degrees Celsius) is better. It is best to store it in a special tea supermarket display cooler. If it is necessary to keep it fresh with other foods, the tea should be properly packaged and completely sealed to avoid odor absorption. The air circulation in the cabinet is good and the cooling effect has been achieved.

　　 When buying a large amount of tea at one time, it should be divided into small bags (cans) first, and then put into the supermarket display cooler. Take out the required brewing volume each time. It is not advisable to repeatedly freeze and freeze the same tea bag.

　　The higher the temperature, the faster the tea quality changes. With an average increase of 10°C, the browning speed of tea will increase by 3 to 5 times. If the tea is stored in a place below 0℃, the aging and quality loss of the tea can be suppressed. When taking out tea leaves from a display cooler in a supermarket, the temperature of the tea leaves in the tea can should be raised to a similar room temperature before taking out the tea. If you open the tea can suddenly, the tea is likely to condense moisture and increase the water content, so that the tea is not finished. Tea accelerates deterioration.

　　convenience store walk-in cooler cabinet is equipped with evaporator, condenser and compressor. The price of walk-in cooler is also determined by the quality of these main structures. Convenience store walk-in cooler cabinets have shelves, which are characterized by curved glass panels on the front and top of the display cooler part, and glass sliding doors at the back that can slide along the slide, and the two sides have corresponding shapes. glass plate. The sliding door can be opened freely on its slide, and is equipped with a curved front glass plate, which is conducive to display and convenient to use. Due to its miniaturization, it can be applied to small food convenience stores and retail stalls.

　　 such as the convenience store walk-in cooler cabinet puts high moisture food or opens the door too many times, etc., can cause excessive frost on the inner wall of the display cooler, and the amount of frost inside the display cooler depends on the humidity in the cabinet The size is related. The price of walk-in cooler should also be balanced according to various aspects such as cooling method. Convenience store walk-in cooler The frost on the inner wall is not as much as possible, it should be as little as possible, because the heat transfer coefficient of frost is low, if the thickness of the frost layer exceeds 10mm, the cooling effect will be significantly reduced. Therefore, it is found When the frost layer on the inner wall of the display cooler exceeds 10mm, defrost it.

　　 is to set the evaporator pipe inside the inner wall of the insulation layer. The convenience store walk-in cooler includes the cabinet, the refrigeration system, the electric control device and the rack. The feature is to put the evaporator outside the original insulation layer of the refrigeration system into the cabinet insulation layer. And close to the inner wall panel. The display cooler evaporator is changed from an external insulation layer to a built-in insulation layer, eliminating the forced air-cooling cycle of the fan, and changing air-cooling to direct-cooling. Convenience store walk-in cooler not only guarantees the preservation and refrigeration of food and other commodities , And the manufacturing interest is reduced, the production cycle is shortened, the direct cooling power consumption is reduced, the noise is reduced, the cooling speed is accelerated, the failure rate is reduced, the use and maintenance are convenient, and the fresh food is effectively prevented from being air-dried, which protects the interests of merchants and is convenient To improve the shopping environment. The price of walk-in cooler is also the most reasonable.

　　 refrigerated showcase Refrigeration Equipment Co., Ltd. is a professional manufacturer of commercial refrigeration equipment integrating R&D, design, manufacturing and sales. The company has advanced production equipment, a strong scientific research team, professional technical personnel, modern management and a complete after-sales service system. Among them, the convenience store walk-in cooler is unique in design, excellent in craftsmanship, exquisite materials, luxurious in appearance, excellent in quality and long-lasting, and technology is steadily leading. Relying on long-term accumulated technological advantages, the company continues to develop and innovate products, gain the best of others, and pursue both internal and external excellence. At present, the commercial refrigeration equipment produced by our company includes four series: supermarket, convenience store, KTV display cooler series, stainless steel refrigeration equipment series for hotels and restaurants, cake and bakery equipment series, and four series of freezing and fresh-keeping cold storage.

　　 fresh-keeping equipment includes, inflatable pump, inflatable tube, solenoid valve, aseptic supermarket commercial refrigeration for aseptic vacuum packaging of plastic bags or composite film bags containing food, etc. The main feature is that it also includes an air filter, an ozone storage tank, an ozone generator, a sterile vacuum chamber, and an electric heat sealer. The inflator and the exhaust nozzle are inserted into the packaging bag containing the food together, and a certain amount of After the ozone is disinfected and sterilized, the ozone is extracted to a vacuum and sealed at the same time. The packaging machine has simple structure, low interest, wide application range, long storage and preservation period, and is suitable for use in food processing departments such as fruits, vegetables, and fish.

　　 supermarket commercial refrigeration can ensure the original taste and taste of food. The fresh-keeping equipment is a new kind of food fruit and vegetable supermarket commercial refrigeration developed on the basis of vacuum packaging machines and nitrogen-filled packaging machines. Its biggest feature is that it solves the shortage of food taste and taste after vacuum packaging and high temperature sterilization, and nitrogen-filled packaging requires aseptic packaging and large investment. Through compound modified atmosphere packaging, the original taste and appearance of the food are guaranteed.

　　 supermarket commercial refrigeration Utilizes natural cold sources, performance indicators: where the temperature outside the warehouse is as high as 40℃ in summer, and the temperature outside the warehouse drops to about -18℃ in winter, the temperature inside the warehouse can always be kept at a low temperature of 2-3℃. In areas where the annual average temperature is -2~13℃, this kind of fresh-keeping storage using natural cold sources without mechanical refrigeration can be built. The temperature in the supermarket commercial refrigeration can be kept at the low temperature required for the preservation of fruits and vegetables during the anniversary, and the temperature can be automatically adjusted at 1~10℃. The relative humidity can always be kept above 90%, which is almost impossible for commercial refrigeration of ordinary mechanical refrigeration supermarkets.

　　Supermarket commercial refrigeration Calculated by storage capacity, scale form: storage capacity of 100~5000 tons. The storage items include apples, pears, peaches, grapes, cauliflower, green peppers and other fruits and vegetables. The construction area needs to be 150-10000 square meters. The construction area of ​​1 square meter can store 0.7-10 tons of fruits and vegetables. Because the commercial refrigeration of refrigerated and refrigerated supermarkets uses natural cold sources, it should be based on the conditions of the construction site. The colder climate or the caves can greatly save the construction expenses. Because there is no complicated fresh-keeping and refrigeration equipment, the temperature can be adjusted automatically, and a warehouse storing 100-5000 tons of fruits and vegetables only needs 2-8 managers.

Tibetan products are divided into small pieces for sale. Pasta, rice, seafood, vegetables, or mixtures of these foods all adopt the technology standard of decentralized freezing and preservation. Liquid nitrogen boils and carbon dioxide sublimates. The energy required for this process is obtained from the food, causing the food to be cooled and eventually frozen.

Very little electricity is used, saving energy. In addition, the price of display cases is more favorable, and refrigerated showcase supermarket display cases are also display cases with higher cost performance.

　　 supermarket commercial refrigeration adopts a wide climate zone design according to the characteristics of different regional climates. The cold air distribution structure is adopted inside, and the converted horizontal single-room refrigeration display cases are based on European and American style. Eliminate the cooling dead angle, making the cooling effect more uniform. refrigerated showcase supermarket commercial refrigeration truly embodies  's human-oriented   design concept; adopts wide climate zone design and is designed according to ergonomics. It has a wider scope of application; ultra-low front height, large display area, and excellent display effect.

　　 supermarket commercial refrigeration can ensure food safety. The appearance model adopts streamlined design, and the operating temperature of the product can be in the range of -21℃~-18℃. Beautiful and unique, luxurious style. Electric heating anti-condensation glass door design, energy saving and consumption reduction; glass door automatic closing design, easy to use. Therefore, consumers should choose reliable supermarket commercial refrigeration. When measuring the quality of commercial refrigeration, commercial refrigeration is a durable consumer product. It can be considered from the two perspectives of technical grade and raw material use. The selection of components, especially key components, has a great impact on the service life of supermarket commercial refrigeration. Good quality commercial commercial refrigeration uses high-quality components such as pure copper pipes and imported coated steel plates to ensure the service life of the refrigeration system and the rust prevention ability of the display cooler .

　　 refrigerated showcase Supermarket commercial refrigeration More than 10 years of use requires additional investment, commercial commercial refrigeration in addition to a one-time investment of several thousand yuan. Among them are mainly electricity expenses and maintenance costs. Consumers must fully consider both aspects before buying. In particular, there is the possibility of an increase in electricity prices, and it is even more important that supermarket commercial refrigeration prices are cheap and the high electricity bills in the future should be ignored. Because commercial refrigeration has different models and different volumes, consumers often have no way of starting to compare. If you use the following formula to compare, you can simplify the complexity and easily determine: supermarket commercial refrigeration power consumption per hectoliter = daily power consumption / display cooler net volume xl00 (the smaller the value obtained, the more power saving)

　　 The energy saving of refrigeration and freezing is beyond imagination. Good-quality supermarket commercial refrigeration uses high-efficiency energy-saving compressors. R600a fluorine-free refrigerant, cyclopentane blowing agent, power consumption is 70% of the ordinary commercial commercial refrigeration, calculated at 0.6 yuan per kilowatt-hour, use Xinfei display cooler 1Only the electricity bill will save 700 yuan in 0 years. The fresh-keeping performance of supermarket commercial refrigeration: Modern people begin to pay attention to the quality of life. Ordinary commercial refrigeration can no longer meet consumers' demands for keeping food fresh and nutritious. Good quality supermarket commercial refrigeration adopts advanced dual temperature control technology to solve the problem of food and clothing. It can accurately measure the actual temperature inside the display cooler, so as to truly ensure that commercial refrigeration always adheres to a constant low temperature ring pit, and maintains the freshness and nutrition of the food.

　　 supermarket refrigerated fresh-keeping display The amount of frost inside the display cooler is related to the humidity in the box. If you put food with high moisture in the cabinet or open the door too many times, it can cause too much frost on the inner wall of the display cooler. Supermarket refrigerated and fresh display display cooler does not have more frost on the inner wall, it should be more The less the better, because the heat transfer coefficient of frost is low, if the frost layer thickness exceeds 10mm, the cooling effect will be significantly reduced. Therefore, when the frost layer thickness on the inner wall of the display cooler is found to exceed 10mm, defrost should be done.

　　 If the temperature in the cabinet meets the requirements of the instructions, the supermarket refrigeration and preservation display display cooler cooling effect should be judged whether it is normal. Mainly check the temperature in the display cooler cabinet. The display cooler in the supermarket refrigerated and fresh-keeping display is normal. Because the manufacturing process of the display cooler requires that some parts have no evaporation tube, the part may not be frosted. And because the temperature in the cabinet is gradually transmitted to the supermarkets in various locations, the display cooler will reach an equilibrium state after a period of time. The temperature difference is not large, so the local non-frosting or frosting cannot be judged. Commercial refrigeration The specification of good or bad refrigeration effect.

　　The cabinet body includes a front door and side walls on the left and right sides. The display cooler of the supermarket refrigerated and fresh-keeping display belongs to the technical field of refrigerated display equipment. It includes a cabinet and a refrigeration mechanism arranged on the cabinet. Supermarket refrigerated and fresh display display cooler The side wall of the display cooler is composed of a transparent window and a foaming layer around the transparent window that supports the transparent window. The display effect is good, the heat preservation effect is good, and the energy consumption is low, which solves the problems of poor display effect or poor heat preservation effect and high energy consumption in the prior art.

　　 is to install the evaporator pipe inside the inner wall of the insulation layer. The supermarket refrigeration and freshness display display cooler includes the cabinet, the refrigeration system, the electric control device and the rack. The feature is to put the evaporator outside the original insulation layer of the refrigeration system into the cabinet insulation layer. And close to the inner wall panel. The evaporator is changed from an external insulation layer to a built-in insulation layer, eliminating the forced air-cooling cycle of the fan, and changing air-cooled refrigeration to direct-cooling refrigeration. The display cooler not only guarantees the preservation of food and other commodities, but also reduces manufacturing interest. The production cycle is shortened, the direct cooling power consumption is reduced, the noise is reduced, the cooling speed is accelerated, the failure rate is reduced, the use and maintenance are convenient, and the fresh food is effectively prevented from being air-dried, which not only protects the interests of merchants, but also facilitates customers and improves shopping surroundings.

　　 Shopping malls and supermarkets are mainly used to put milk, beverages, vegetables and fruits, fresh meat, cooked food, soy products, frozen food, seafood products and other commodities. The supermarket refrigerated showcase styles required for different commodities are also quite different. Conventional supermarket refrigerated showcases include: air curtain cabinets, a la carte supermarket refrigerated showcase, frozen island cabinets, deli cabinets, fresh meat cabinets, seafood counters, horizontal frozen display supermarket refrigerated showcases, etc. Among them, air curtain cabinets and frozen island cabinets are the most commonly used . The supermarket refrigerated showcase is composed of a closed loop box made of aluminum alloy materials. The supermarket refrigerated showcase is under the maintenance of the external thermal insulation shell. The outside of the box is connected to the air inlet duct and connected to the outdoors to introduce cold air from the outside into the box, and then through this natural circulation, the outdoor cold air can be circulated from the box from time to time, which can be used without electricity To achieve the purpose of refrigeration under the circumstances.

　　 supermarket refrigerated showcase is rotatably pivoted to the door of the heat-insulated box through hinge parts located on one side in the left and right direction. The supermarket refrigerated showcase is a heat-insulated box with a front opening to form a storage room. The opening of the storage room can be opened and closed freely. The door is enclosed by the outer and inner surface materials, the left and right sides of the resin sheath connecting these outer and inner surface materials, and the inner surface material and the sheath filled with these outer materials. The thermal insulation material composition of the space. The supermarket refrigerated showcase has the advantages of simple and hygienic outer parts. Especially when the temperature is lower than -18℃, generally speaking, the low temperature environment can effectively inhibit the reproduction and growth of bacteria. The reproduction and growth of bacteria will be particularly slow, which can ensure that the food does not rot or degenerate in temporary storage.

　　Because the temperature of the refrigerator compartment of the supermarket refrigerated showcase is maintained between 0-10℃, although it can limit the reproduction of bacteria, it cannot completely prevent it. Therefore, if the food is put in the supermarket refrigerated showcase for a long time, it will definitely change in quality and taste. The faster the food that is prone to spoilage, the faster it will change. Generally speaking, the refrigerating room of the supermarket refrigerated showcase can only keep fresh and can only be used as a short-term storage room. For long-term food storage, it should be placed in the freezer. However, the food in the freezer compartment also has a certain storage time, because although the frozen bacteria multiply slowly, but the time is too long, it will deteriorate. Sometimes even if it does not deteriorate, the taste will change. Please store according to the expiry date of the instruction.

　　SupermarketSupermarket refrigerated showcase Due to the high humidity in the environment, in summer. The internal frosting speed is relatively fast. Under normal circumstances, it is best to clean up the supermarket refrigerated showcase a month. Note that the defrosting shovel is best to use the equipped defrosting shovel. If there is no defrosting shovel, you can use plastic parts. Do not use it. Sharp metal devices prevent damage to the inner bladder or tube exposure. In winter, the defrosting time can be extended appropriately, and the cabinet should be cleaned up when defrosting. Supermarket supermarket refrigerated showcase Sometimes carelessness may cause food etc. to fall inside and cause blockage. The defrosting water in the refrigerator compartment should be drained from the water outlet on the back. If you find water in the drainage groove, please pay attention to see if it is blocked with a through-hole pin or soft plastic parts for dredging.

　　 It is understood that the National Development and Reform Commission, the Ministry of Finance, and the Ministry of Industry and Information Technology have jointly released a new batch of energy-saving projects to promote the people. The commercial display cases promotion catalog covers 9 areas including gas water heaters, air source heat pump water heaters, display cases, washing machines, flat-screen TVs, and air conditioners.

　　 For this, experts in commercial display cases think this is a good signal. This kind of cross-domain diversified production is no longer a rare thing. World-renowned electronics companies such as Haier, refrigerated showcase supermarket refrigerated showcase and other world-renowned electronics companies have developed this development model long ago. This also shows that Chinese home appliance commercial display cases companies are moving towards A world-class home appliance company is moving forward. Ren Minqi, a researcher in the home appliance industry of CIC Consulting, also said that the practice of home appliance business display cases companies involved in multiple businesses is worthy of recognition. This is a way of making full use of their own technological advantages, broadening the industrial chain, and strengthening synergy.

　　 At present, Haier, Hisense, Midea, refrigerated showcase and other companies have a certain foundation in intelligent control technology, and have also launched corresponding products. If you forget to turn off the air conditioner when you go out, you can turn it off through the smart phone program; the child will automatically receive the message of getting home safely after school, and see the child learning through video surveillance; commercial display cases can design recipes for you to tell you how to match food, etc. Realize one by one. The commercial display cases of refrigerated showcase can also use the cloud background to realize the functions of food preservation management and Internet of Things services in the display cases; Meiling's newly developed 537WIPB smart second-generation product can not only realize remote control and automatic alarm on mobile phones, but also actively sterilize , Commercial display cases create a fresh and healthy kitchen environment; while refrigerated showcase's translucent touch screen refrigerator can not only display which foods are in the refrigerator and their shelf life, but also provide cocktails and other mixed drinks recipes.

　　Lian Siqing believes that the commercial display cases home appliance industry will usher in a golden period of development in the next few years. In the next eight years, the total scale of my country's home appliance market will exceed 18 trillion yuan, with an average annual growth rate of 2.2 trillion yuan, which is nearly an increase from 2012. Doubled, with an average annual compound growth rate of more than 12%. Commercial display cases Urbanization is the greatest potential for expanding domestic demand. The continued implementation of the overall regional development strategy will bring greater benefits to the development of home appliances. Informatization will help the rapid development of home appliances and emerging channels. The rapid development of commercial display cases technology will bring home appliances. Continuous product upgrades, doubling of income, and gradual improvement of the social security system will release huge consumption potential, and environmental improvements and energy-saving products will quickly become popular in the next few years.

The refrigerated showcase supermarket display cooler mentioned above first realized the optimal matching of the whole machine technically, and its important technical indicators such as heat preservation and energy saving reached or exceeded the international leading level in the 1990s. The advanced level of scientific research has made refrigerated showcase supermarket display cooler highly praised by major international companies such as Japan and Europe. The technologicalization and diversification of products brought about by high-tech has become the mainstream of the supermarket display cooler market, which has also greatly broadened the choices of consumers.

Condensation occurs in the sealing strip of the door or the seal of the insulation wall of the refrigerated warehouse, which indicates that the seal is not tight. In addition, supermarket commercial refrigeration frequently opens and closes the warehouse door or more people enter the warehouse together, which will also increase the cooling capacity loss of the warehouse. Try to prevent opening the warehouse door to prevent a large amount of hot air from entering the warehouse. Of course, when commercial refrigeration prices and cold storage warehouses are frequently stocked or stocks are too large, the heat load increases sharply, and it generally takes a long time to cool down to the specified temperature.

　　 The purchase and sale price difference of supermarket refrigerated showcase in supermarkets. Frost-free is not a real frost-free supermarket refrigerated showcase. It is nothing more than using a fin-type evaporator to hide the evaporator, and use a fan to send cold air through various ducts to send cold air in To achieve the purpose of cooling each part, it should be noted that each air-cooled frost-free supermarket refrigerated showcase has a mechanical or electronic defrosting system, when the compressor works for a period of time (about 8-12 hours) fin evaporator The surface will also be frosted. If the supermarket refrigerated showcase is not defrosted, the frost will become thicker and thicker, and the fin evaporator will be full and the air duct will be blocked, so that the cooling effect of the cold air cannot be recycled. The supermarket refrigerated showcase is equipped with an electric heating wire and a bimetal temperature control and temperature fuse in the middle of the fin evaporator. When defrosting, the evaporator is heated by the electric heating wire to a certain temperature and the bimetal temperature control is disconnected. Restore refrigeration

　　 supermarket refrigerated showcase Every 6 hours, the timer will power on the heating tube. The heating tube is wrapped in the middle of the refrigerating tube, and it will melt the ice on the refrigerating tube. When the ice has completely melted, the supermarket refrigerated showcase temperature sensor senses that the temperature has reached above zero degrees Celsius and turns off the heating tube. Supermarket supermarket refrigerated showcase Heating the refrigeration tube every 6 hours will consume a lot of energy, and the resulting temperature changes will make the food in the refrigerator cyclically react. Therefore, most large supermarket supermarket refrigerated showcase rely on manual defrosting, which can extend the shelf life of food and reduce energy consumption. Supermarket refrigerated showcase using forced circulation of air-conditioning for refrigeration, cold (air-cooled) supermarket supermarket refrigerated showcase, are also what we call frost-free supermarket refrigerated showcase. Air-cooled frost-free evaporators are commonly used in the finned tube type. They are placed in the mezzanine between the freezer compartment and the refrigerating compartment or the upper part of the back of the box. The air convection in a small fan cabinet is used to achieve cooling. Less than the frost it produces.

　　 The evaporator of the supermarket refrigerated showcase is not in direct contact with the food, and the evaporator can be heated up for a short time through the heating system, and the refrigeration will be restored immediately after defrosting. The temperature fluctuation in the supermarket refrigerated showcase is very small, which is convenient and will not affect the food. The quality of cold storage.

　　Air-cooled frost-free supermarket Defrost system in supermarket refrigerated showcaseComposition: 1. Frost timer (accumulatively calculate the compressor work for 17-24 hours, disconnect the compressor power supply and supply power to the evaporator, water tank and heating wire); 2. Hair heater (evaporator heating and defrosting) ; 3. Water tank heating wire (to heat the water tank for defrosting); 4. Frost thermostat (control the temperature during defrosting); 5. Metal sheet or temperature insurance (a protective device to prevent the defrost thermostat from malfunctioning) work Principle: The defrost timer accumulates and calculates that the compressor will stop powering the compressor and the circulating fan after 17-24 hours of operation. At the same time, it will supply power to the evaporator and the heating wire of the water saving tank through the defrosting thermostat and temperature insurance. When the thermostat monitor reaches the critical point (the temperature at which the defrost thermostat is located), the heating wire will be disconnected from the power supply (if the defrost thermostat reaches the critical point and has not been disconnected, the temperature fuse will be overheated and disconnected) to this one The defrosting process is over, and then the timer restores power to the compressor, and a delay of a few minutes to power the circulating fan, and refrigeration starts again.

　　air-cooled frost-free supermarket supermarket refrigerated showcase The evaporator is often a finned tube type, placed in the interlayer between the freezer compartment and the refrigerator compartment or in the upper rear of the box. Use a small fan to force the air in the box to convection to achieve the purpose of cooling. Most household refrigerators have direct cooling refrigerators, and the output of supermarket refrigerated showcases in in-room cooling supermarkets is relatively small. Frost-free / Frost supermarket supermarket refrigerated showcase Why frost-free forced cooling refrigerators consume more power than frosted direct cooling refrigerators. Frost-free refrigerators use manual defrosting without electric heating. An air-cooled non-frost supermarket supermarket refrigerated showcase is equipped with a 150W electric heater for defrosting, heating 2 to 3 times a day, 20 to 30 minutes each time. In two supermarket refrigerated showcases with the same volume, the frost-free forced cooling type consumes more power than the frosted direct cooling type, so the frost-free type consumes more power. Comparing the power consumption of forced cooling and direct cooling refrigerators, the forced cooling supermarket supermarket refrigerated showcase is equipped with fans to force cold air to flow to cool the cabinet.

　　 In large shopping malls, when the staff pick up the food stored in the supermarket’s walk-in cooler, they should follow the principles of fast action, small angle, and planned opening and closing. The food should be taken out or put in one time in a planned way. Supermarket walk-in cooler, so as to avoid excessive cold air overflow and excessive indoor hot air entering the supermarket walk-in cooler. Supermarket walk-in cooler should be placed in a place with low ambient temperature and good ventilation, and there should be proper space around the supermarket refrigerated showcase to facilitate heat dissipation.

　　 The space utilization of the supermarket walk-in cooler also affects the power consumption of the walk-in cooler. It is important to adjust the temperature of the supermarket walk-in cooler reasonably according to seasonal changes, food types and quantity, so as to ensure the quality of food , So that the whole machine is always in the best working condition. The food stored in the walk-in cooler in the supermarket should be moderate, not too much, and placed regularly. Because the volume and load of the supermarket refrigerated showcase are fixed, if the food is too full, it will affect it. Suitable to be placed on the walk-in cooler door shelf: foods that are packaged but opened and will not deteriorate in a day or two, such as ketchup, salad dressing, tahini, hoisin sauce, cheese, butter, jam, juice, etc. , And egg foods such as eggs and salted duck eggs.

　　 Directly imported cooked food, yogurt, desserts, etc. are placed on the upper floor near the door. When storing these foods, the supermarket walk-in cooler should avoid too low temperature and prevent cross-contamination of raw and cooked foods, so they should not be placed on the lower level. Leftovers, leftover soy milk, packaged soy products, etc. are suitable to be placed on the upper back wall. Since these foods are easy to breed bacteria, supermarket walk-in cooler should be slightly lower than 0 ℃ temperature is the most suitable. Various vegetables and temperate fruits such as apples and pears are suitable to be placed near the door on the lower level, and should be packed in fresh-keeping bags to avoid freezing damage due to the low temperature of the supermarket walk-in cooler. Foods that are not cooked but need to be stored at a low temperature, such as water tofu, salted kelp shreds, etc. are suitable for placing on the lower back wall, foods with tight packaging that are not afraid of cross-contamination, and foods waiting to be slowly defrosted, suitable for storage In the coldest part of the supermarket walk-in cooler, such as the lower back wall.

　　 Try to reduce the number and time of supermarket walk-in cooler opening. Hot food should be allowed to cool to room temperature naturally, and then put it into the supermarket walk-in cooler. Fruits and flowers are more watery. They should be washed and drained, wrapped in a plastic bag and placed in the supermarket walk-in cooler. In order to prevent the moisture from evaporating and thickening the frost layer, it will affect the cooling effect of the supermarket walk-in cooler and increase the power consumption. In summer, ice cubes and cold drinks are best arranged in the evening. The temperature is lower at night, which is conducive to the heat dissipation of the condenser, and there are fewer supermarket walk-in cooler doors to access food at night, and the compressor has a shorter working time, which saves electricity. Store food in an appropriate amount, 80% of the volume is appropriate, otherwise it will affect the air convection in the supermarket walk-in cooler, which will cause difficulty in heat dissipation of the food, affect the preservation effect, increase the working time of the compressor, and increase the power consumption.