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    How to choose the matching type of cold storage

    How to choose the matching type of cold storage 1. According to temperature: A, high temperature cold storage (± 5 ℃): suitable for the preservation of fruits and vegetables; B. Medium temperature cold storage (-10 ℃ ~ -5 ℃): suitable for food refrigeration after freezing; C, low temperature cold storage (-20 ℃ ~ -10 ℃): suitable for the refrigeration of aquatic products and poultry meat products after freezing; D. Freezing cold storage (below -23 ℃): suitable for quick freezing before fresh products are refrigerated; 2. According to volume: A, small cold storage: <500m3 B, medium-sized cold storage: 500 ~ 1000m3 C, large cold storage:> 1000m3 Cold storage structure and main equipment 1. Insulation materials and moisture barrier A. Warehouse board: pre-produced, with fixed length, width and thickness, which can be selected according to the needs of the warehouse installation. High and medium temperature cold storage generally use 10 cm thick plates, low temperature storage and freezing storage generally use 12 cm or 15 cm thick plates; B. Polyurethane spray foam material: This material is sprayed directly in the warehouse to form a polyurethane board that does not absorb water and has good thermal insulation, but the cost is higher. C. Polystyrene resin spray foaming material: this material is also sprayed to form polystyrene board, which is more water-absorbent than polyurethane board and has poor heat insulation, but the cost is lower. D. Since the heat insulation material is damp, the heat insulation performance is reduced. Therefore, a moisture-proof layer should be added on both sides of the heat insulation board, or only as an external moisture-proof layer. The moisture-proof layer is generally made of asphalt, linoleum, plastic coating, plastic film or metal plate. 2. Refrigeration system A. Compressor (the most critical accessory): Under normal circumstances, the small cold storage uses a fully enclosed compressor. Medium-sized cold storage generally chooses semi-hermetic compressors. Large-scale cold storage uses semi-hermetic compressors. In the selection, the ammonia refrigeration compressor can also be considered, because the ammonia refrigeration compressor has high power and can be used for one machine, but the installation and management are cumbersome. B. Evaporator: In general, the high-temperature warehouse uses a fan as the evaporator, which is characterized by a fast cooling speed, but it is easy to cause moisture loss of cold storage; medium and low-temperature cold warehouses are mainly made of seamless steel tubes. The characteristic is that the constant temperature effect is good, and the cold storage can be timely. C. Condenser: The condenser has air cooling, water cooling and air and water combined cooling methods. Air cooling is limited to applications in small cold storage equipment, and water-cooled condensers can be used in all forms of refrigeration systems. 3.Other accessories: temperature control machine, door lock, hinge, handle, etc.

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    How to choose the matching type of cold storage

    06/14/2020

    How to choose the matching type of cold storage

    A, high temperature cold storage (± 5 ℃): suitable for the preservation of fruits and vegetables; B. Medium temperature cold storage (-10 ℃ ~ -5 ℃): suitable for food refrigeration after freezing; C, low temperature cold storage (-20 ℃ ~ -10 ℃): sui器2䀀ￜ皥䖒皦즠Ʋ奌ི㲈Ʋ䌁皦ᮔDž༬皧奖ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘

    Design and selection of compressor unit for mobile cold storage

    06/14/2020

    Design and selection of compressor unit for mobile cold storage

    1. Regardless of the brand selection of the compressor unit, it is determined according to the evaporation temperature of the active cold storage and the effective working volume of the cold storage. In addition, the condensation temperature of the frozen器2䀀ￜ皥䖒皦즠Ʋ焬क़㲈Ʋ䌁皦ᮔDž༬皧然क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ

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    What are the causes of frost in refrigeration compressors

    1. The opening of the thermal expansion valve is too large, or the installation of the temperature sensor is incorrect and the fixing is not firm or loose. The main reason is that the temperature sensor may feel the temperature too high in this case, resu器2䀀ￜ皥䖒皦즠Ʋ奌ི㲈Ʋ䌁皦ᮔDž

    The principle of air heat pump heating

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    In our lives, we often say "warm and warm to the house" to our guests. Compared with the cold and wet climate in the southern region, the cold in the northern region is dry and cold. The outdoor working temperature is minus ten or twenty degrees, which is器2䀀ￜ皥䖒皦즠Ʋ焬क़㲈Ʋ䌁皦ᮔDž༬皧然क़Ѐ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់

    The performance of the car compressor is broken, can the car compressor be repaired

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    The performance of the car compressor is broken, can the car compressor be repaired

    What problems or symptoms will occur when the car compressor is broken? The simplest performance is that the air conditioner does not cool, because the air conditioner compressor is responsible for compressing and driving the refrigerant in the air condit器2䀀ￜ皥䖒皦즠Ʋ奌ི㲈Ʋ䌁皦ᮔDž༬皧奖ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠Ʋ

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    The compressor has been short of oil for a long time-the mechanism and the friction pairs are overheated, resulting in bearing sintering and shaft holding. The compressor is short of oil for a short time-the mechanism and the friction pairs are abnorma器2䀀ￜ皥䖒皦즠Ʋ焬क़㲈Ʋ䌁皦

    Refrigeration unit in artificial environment simulation laboratory

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    Piston refrigeration compressor classification

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    How to solve the phenomenon that the low temperature of the high and low temperature test chamber cannot be maintained

    First check whether the refrigeration unit of the high and low temperature box can be started during the operation of the high and low temperature test box. If the refrigeration compressor of the high and low temperature box can be started during the enti器2䀀ￜ皥䖒皦즠Ʋ奌ི㲈Ʋ䌁皦ᮔDž༬皧奖ིЀ呄ᠾ鹨់༹皧ࠄ00령ꐱ댁珵뛐珵Љ䕄ྦ￿￿뤂ᐱ뚜珵ᴴᏩ呄ᠾ퍘ᒥ鹨់ᩄꋔྦ瑉浥巠皱㙲皦抐皱巠皱੨皦柘皱ￜ皥ب巠皱㙲皦忈皱੨皦柘皱즠Ʋǜ勁皦즠ƲبǜV /펔B䌁皦

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