Double-cold-source multi-mode refrigeration and cold storage integrated fresh-keeping storehouse cold supply system

Abstract

The invention relates to a double-cold-source multi-mode refrigeration and cold storage integrated fresh-keeping storehouse cold supply system, and belongs to the technical field of refrigeration and fresh keeping. The system comprises a steam compression type refrigeration subsystem with a cold accumulation function, a dry-wet complementary cold supply tower, a secondary refrigerant circulating pump, an air cooler and other main components. According to weather conditions, the temperature of the fresh-keeping storehouse and the cold load, the steam compression type refrigeration subsystem with the cold accumulation function and the dry-wet complementary cold supply tower are used for cold supply. The steam compression type refrigeration subsystem with the cold accumulation function can operate in three modes of refrigeration, cold accumulation and cold supply, refrigeration, cold accumulation and cold supply. The dry-wet complementary cold supply tower can operate in a dry working condition cold supply mode and a wet working condition cold supply mode. According to the cold supply system of the fresh-keeping storehouse, the dry-wet complementary cold supply tower is used for supplying a low-energy-consumption cold source, and the refrigeration and cold storage integrated evaporator is used for storing cold for carrying out power load peak clipping and valley filling and reducing the energy consumption cost. The system has the advantages of energy conservation, low operation cost, capability of balancing and reducing the load of the power grid and the like.

Description

Technical Field

[0001] The invention relates to a dual-cold-source multi-mode refrigeration and cold-storage integrated fresh-keeping warehouse cooling system, belonging to the technical field of refrigeration and fresh-keeping. Background Art

[0002] Refrigeration and preservation of agricultural products and food is a high-energy operation. The traditional cold storage refrigeration system uses a conventional vapor compression refrigeration subsystem or absorption refrigeration system for cooling, which not only has high energy consumption, high carbon emissions, and high operating costs, but also exacerbates the contradiction between supply and demand of electricity during the peak period of electricity consumption in summer, and has a great impact on the power grid. For areas that implement peak and valley electricity prices, the traditional cold storage refrigeration system further increases the operating costs of the fresh storage.

[0003] Direct evaporative cooling uses outdoor air to directly contact water to absorb water vapor, partially evaporate the liquid water, and cool the unevaporated liquid water. Compared with steam compression refrigeration and absorption refrigeration, direct evaporative cooling has low energy consumption, but its cooling capacity and the temperature of the prepared chilled water are affected by the inlet water temperature and the temperature and humidity of the outdoor air, making it difficult to efficiently and economically meet the requirements of the cold load and temperature of the fresh-keeping warehouse around the clock. On the other hand, the cold storage device uses low-peak electricity refrigeration at night to store the cold in the form of low-temperature liquid or latent heat of phase change, and releases the cold during peak load periods to reduce the installed capacity of the refrigeration equipment, reduce operating costs and power load. At present, the traditional cold storage device is set separately from the refrigeration system, so the system is complex and the initial investment is high.

[0004] Therefore, combining direct evaporative cooling and cold storage technology to develop a new type of cold storage cooling system with low energy consumption, low operating cost, low construction cost and low power load has important application value and broad application prospects. Summary of the invention

[0005] The technical problem to be solved by the present invention is: the present invention provides a new type of dual-cold-source multi-mode refrigeration and cold storage integrated fresh-keeping warehouse cooling system, which solves the problems of high energy consumption, high freight costs, and high power load in current conventional fresh-keeping warehouses. The present invention can effectively reduce the energy consumption of fresh-keeping warehouses.

[0006] The technical solution of the present invention is: a dual-cold-source multi-mode refrigeration and cold storage integrated fresh-keeping warehouse cooling system, including a steam compression refrigeration subsystem with cold storage, and the steam compression refrigeration subsystem with cold storage is provided with an evaporator 8 with refrigeration and cold storage integration;

[0007] When the vapor compression refrigeration subsystem with cold storage operates in the refrigeration-cold storage-cold supply mode, the liquid refrigerant in the evaporator 8 with integrated refrigeration and cold storage evaporates to cool, the cold storage medium stores cold, and the cold in the cold storage medium is used to supply cold to the fresh-keeping warehouse;

[0008] When the vapor compression refrigeration subsystem with cold storage operates in the refrigeration-cold storage mode, the liquid refrigerant in the evaporator 8 with integrated refrigeration and cold storage evaporates for refrigeration, and the cold storage medium stores cold;

[0009] When the vapor compression refrigeration subsystem with cold storage operates in the cold storage-cold supply mode, the cold energy stored in the cold storage medium in the evaporator 8 with integrated refrigeration and cold storage is used to supply cold to the fresh-keeping warehouse.

[0010] As a further solution of the present invention, it also includes a dry-wet complementary cooling tower 1;

[0011] During the period when the outdoor temperature is high and the steam compression refrigeration subsystem with cold storage supplies cold to the fresh-keeping warehouse, the dry-wet complementary cooling tower 1 cools the cooling medium of the liquid-cooled condenser 10 in the wet working mode;

[0012] During the period when the outdoor air temperature is low and the dry-wet complementary cooling tower 1 can meet the cooling load and temperature requirements of the fresh-keeping warehouse in the wet operating mode, the dry-wet complementary cooling tower 1 supplies cooling to the fresh-keeping warehouse in the wet operating mode, the steam compression refrigeration subsystem with cold storage is shut down, and the water whose temperature is reduced in the wet operating mode of the dry-wet complementary cooling tower 1 is used to cool the refrigerant, and the cooled refrigerant is used to supply cooling to the fresh-keeping warehouse;

[0013] During the period when the outdoor air temperature is low and the dry-wet complementary cooling tower 1 can meet the cooling load and temperature requirements of the fresh-keeping warehouse in the dry operating mode, the dry-wet complementary cooling tower 1 supplies cooling to the fresh-keeping warehouse in the dry operating mode, the steam compression refrigeration subsystem with cold storage is shut down, and the dry-wet complementary cooling tower 1 uses the outdoor air under dry conditions to cool the refrigerant, and the cooled refrigerant is used to supply cooling to the fresh-keeping warehouse.

[0014] As a further solution of the present invention, the steam compression refrigeration subsystem with cold storage comprises: a refrigerant pipeline 6, a compressor 7, an evaporator 8 with integrated refrigeration and cold storage, a throttle valve 9, and a liquid-cooled condenser 10;

[0015] The outlet of the compressor 7 is connected to the inlet of the liquid-cooled condenser 10 through the refrigerant pipe 6, the outlet of the liquid-cooled condenser 10 is connected to the inlet of the throttle valve 9 through the refrigerant pipe 6, the outlet of the throttle valve 9 is connected to the inlet of the evaporator 8 integrated with refrigeration and cold storage through the refrigerant pipe 6, and the outlet of the evaporator 8 integrated with refrigeration and cold storage is connected to the inlet of the compressor 7 through the refrigerant pipe 6.

[0016] The cooling medium of the liquid-cooled condenser 10 is cooled by the dry-wet complementary cooling tower 1 under wet conditions to effectively improve the cooling effect, thereby improving the refrigeration performance of the steam compression refrigeration subsystem and reducing energy consumption. The cooling medium can be ethylene glycol aqueous solution or pure water. The refrigeration capacity generated by the evaporation of the liquid refrigerant in the evaporator 8 with integrated refrigeration and cold storage is stored in the evaporator 8 with integrated refrigeration and cold storage by the cold storage medium. The cold storage medium can be made of materials such as pure water with large latent heat of box transformer and good compatibility with metal.

[0017] As a further solution of the present invention, it also includes a refrigerant circulation pump I2, a refrigerant circulation pump II11, a cooling fan 14, a solenoid valve I3, a solenoid valve II4, a solenoid valve III5, a solenoid valve IV12, a solenoid valve V13, and a refrigerant pipeline 15;

[0018] The outlet of the refrigerant circulation pump I2 is connected to the refrigerant cooling coil inlet joint 104 of the dry-wet complementary cooling tower 1, and the refrigerant cooling coil outlet joint 106 of the dry-wet complementary cooling tower 1 is respectively connected to the refrigerant inlet of the liquid-cooled condenser 10 in the steam compression refrigeration subsystem with cold storage and the inlet of the solenoid valve V13, and the refrigerant outlet of the liquid-cooled condenser 10 in the steam compression refrigeration subsystem with cold storage is connected to the inlet of the solenoid valve I3, and the outlet of the solenoid valve I3 is connected to the inlet of the refrigerant circulation pump I2;

[0019] The outlet of the solenoid valve V13 is connected to the air cooler 14, the air cooler 14 is connected to the solenoid valve II4 through the refrigerant pipe 15, and the solenoid valve II4 is connected to the inlet of the refrigerant circulation pump I2;

[0020] The outlet of solenoid valve V13 is also connected to solenoid valve IV12, solenoid valve IV12 is connected to refrigerant circulation pump II11, refrigerant circulation pump II11 is connected to the evaporator 8 with integrated refrigeration and cold storage in the steam compression refrigeration subsystem with cold storage, the evaporator 8 with integrated refrigeration and cold storage is connected to solenoid valve III5, and solenoid valve III5 is connected to solenoid valve II4.

[0021] As a further solution of the present invention, the dry-wet complementary cooling tower 1 comprises: a glass fiber reinforced plastic shell 101, a fan 102, a spray pipe 103, a refrigerant cooling coil inlet joint 104, a refrigerant cooling coil 105, a refrigerant cooling coil outlet joint 106, an air inlet 107 with a protective net, a water supply pipe 108, a circulating water pipe 109, a water pump 1010, a drain pipe 1011, a drain valve 1012, a water level controller 1013, and a hydrophilic polymer heat and moisture exchange component 1014; the water level controller 1013 adopts a float valve to automatically replenish water to the dry-wet complementary cooling tower 1. The refrigerant adopts a liquid with excellent low-temperature fluidity such as ethylene glycol aqueous solution and pure water.

[0022] The bottom of the FRP shell 101 is provided with a drain pipe 1011, and a drain valve 1012 is provided on the drain pipe 1011; the FRP shell 101 is also provided with a circulating water pipe 109, the circulating water pipe 109 is connected to the water pump 1010, the water pump 1010 is connected to the spray pipe 103 through the circulating water pipe 109, and the spray pipe 103 is arranged at the upper part of the FRP shell 101; the middle and lower part of the FRP shell 101 is provided with an air inlet 107 with a protective net, and the end of the water supply pipe 108 passes through the air inlet 107 with a protective net and is located in the FRP shell 101, and the water supply pipe 108 passes through the air inlet 107 with a protective net and is located in the FRP shell 101, and the water supply pipe 108 passes through the air inlet 107 with a protective net and is located in the FRP shell 101, and the water supply pipe 108 passes through the air inlet 107 with a protective net. A water level controller 1013 is provided at the end of the water pipe 108; a refrigerant cooling coil inlet joint 104 and a refrigerant cooling coil outlet joint 106 are respectively provided inside the FRP shell 101, and the refrigerant cooling coil inlet joint 104 and the refrigerant cooling coil outlet joint 106 are connected through the refrigerant cooling coil 105; a hydrophilic polymer heat and moisture exchange component 1014 is provided inside the FRP shell 101, between the spray pipe 103 and the refrigerant cooling coil 105; a fan 102 is provided on the top of the FRP shell 101.

[0023] As a further solution of the present invention, according to the climatic conditions, the storage temperature of the fresh-keeping storage and the cooling load, the dry-wet complementary cooling tower 1 can be operated in the wet working mode and the dry working mode respectively;

[0024] In the wet working mode, the water pump 1010 and the fan 102 are both turned on. Under the action of the water pump 1010, water is sprayed out from the spray pipe 103 and enters the hydrophilic polymer heat and moisture exchange component 1014 by its own gravity. At the same time, under the action of the fan 102, the outdoor air enters the hydrophilic polymer heat and moisture exchange component 1014 through the air inlet 107 with a protective net. The air and water are in direct contact to absorb water vapor, and then discharged to the outside from the top of the dry-wet complementary cooling tower 1. Part of the liquid water evaporates, and the unevaporated The liquid water is cooled, so the water temperature is reduced. The water with reduced temperature exchanges heat with the refrigerant cooling coil 105 to cool the refrigerant, and then enters the bottom of the dry-wet complementary cooling tower 1, flows through the circulating water pipe 109 under the action of the water pump 1010 and is sprayed out from the spray pipe 103 again; the surface of the hydrophilic polymer heat and moisture exchange component 1014 is sprayed with a hydrophilic polymer film to increase the contact area between air and water, enhance the heat and moisture exchange between water and air, thereby improving the direct evaporative cooling performance of the dry-wet complementary cooling tower 1.

[0025] In the dry working mode, the fan 102 is turned on and the water pump 1010 is stopped; under the action of the fan 102, the outdoor air flows through the refrigerant cooling coil 105 through the air inlet 107 with a protective net, making full use of the low-temperature outdoor air to moderately cool the refrigerant.

[0026] As a further solution of the present invention, the evaporator 8 with integrated refrigeration and cold storage includes: a heat preservation shell 801, a coolant exchange coil inlet joint 802, a refrigerant evaporation coil inlet joint 803, a refrigerant evaporation coil outlet joint 804, a coolant exchange coil outlet joint 805, a refrigerant evaporation coil 806, a coolant exchange coil 807, an exhaust pipe 808, a coolant filling port 809, a coolant drain valve 8010, and a coolant drain pipe 8011;

[0027] The top of the insulation shell 801 is provided with an exhaust pipe 808 and a coolant filling port 809, and the exhaust pipe 808 and the coolant filling port 809 are respectively arranged on the left and right sides of the insulation shell 801; a coolant exchange coil inlet joint 802 is arranged in the middle and upper part of the right side of the insulation shell 801, a refrigerant evaporation coil inlet joint 803 is arranged in the middle and lower part of the right side of the insulation shell 801, a refrigerant evaporation coil outlet joint 804 is arranged in the middle and upper part of the left side of the insulation shell 801, and a refrigerant evaporation coil outlet joint 804 is arranged in the middle and lower part of the left side of the insulation shell 801. The refrigerant exchange coil outlet joint 805, the refrigerant evaporation coil 806 is installed inside the insulation shell 801 through the refrigerant evaporation coil inlet joint 803 and the refrigerant evaporation coil outlet joint 804; the secondary refrigerant exchange coil 807 is installed inside the insulation shell 801 through the secondary refrigerant exchange coil inlet joint 802 and the secondary refrigerant exchange coil outlet joint 805; the secondary refrigerant drain pipe 8011 is provided at the bottom of the insulation shell 801, and the secondary refrigerant drain pipe 8011 is provided with a secondary refrigerant drain valve 8010;

[0028] The refrigerant evaporation coil inlet connector 803 is connected to the outlet of the throttle valve 9;

[0029] The refrigerant evaporation coil outlet connector 804 is connected to the air intake port of the compressor 7 through the refrigerant pipeline 6;

[0030] The refrigerant exchange coil inlet connector 802 is connected to the outlet of the refrigerant circulation pump II 11;

[0031] The refrigerant exchange coil outlet connector 805 is connected to the inlet of the solenoid valve III5.

[0032] As a further solution of the present invention, the evaporator 8 with integrated refrigeration and cold storage adopts an integrated refrigeration and cold storage structure to effectively reduce its manufacturing cost and reduce the loss of cold capacity. At the same time, cold storage is used to smooth the peak of power load and reduce energy consumption costs. The liquid refrigerant from the refrigerant evaporator coil inlet joint 803 and the outlet of the throttle valve 9 in the refrigerant evaporator coil 806 exchanges heat with the refrigerant in the refrigerant exchange coil 807, absorbs heat from the refrigerant and evaporates, and the generated cooling capacity is stored in the cold storage medium of the evaporator 8 with integrated refrigeration and cold storage. The gaseous refrigerant after absorbing heat and vaporization enters the suction port of the compressor 7 through the refrigerant evaporator coil outlet joint 804 for compression. The compressed high-pressure gaseous refrigerant enters the liquid-cooled condenser 10 and exchanges heat with the refrigerant cooled by the dry-wet complementary cooling tower 1. The high-pressure gaseous refrigerant releases heat at a lower temperature and condenses into liquid refrigerant. The liquid refrigerant enters the refrigerant evaporator coil inlet joint 803 and the refrigerant evaporator coil 806 through the throttle valve 9.

[0033] Under the traction of the refrigerant circulation pump Ⅱ11, the refrigerant enters the refrigerant cooling coil 807 through the refrigerant cooling coil inlet joint 802 to exchange heat with the cold storage medium. The refrigerant with reduced temperature enters the cold air fan 14 through the refrigerant cooling coil outlet joint 805 and the solenoid valve Ⅲ5 to exchange heat with the air in the fresh-keeping room to provide cooling to the fresh-keeping room.

[0034] As a further solution of the present invention, the steam compression refrigeration subsystem with cold storage operates in three modes: refrigeration-cold storage-cold supply, refrigeration-cold storage, and cold storage-cold supply:

[0035] During the night when electricity consumption is low, outdoor temperature is high and there is a demand for cooling in the fresh-keeping warehouse, the steam compression refrigeration subsystem with cold storage operates in the cooling-cold storage-cooling supply mode;

[0036] During the night when electricity consumption is low, outdoor temperature is high and there is no cooling demand in the fresh-keeping warehouse, the vapor compression refrigeration subsystem with cold storage operates in cooling-cold storage mode;

[0037] During the peak hours of electricity consumption during the day, when the outdoor temperature is high and there is a demand for cooling in the fresh-keeping room, the vapor compression refrigeration subsystem with cold storage operates in the cold storage-cooling mode.

[0038] As a further solution of the present invention, in the refrigeration-cold storage-cold supply mode, the solenoid valve I3, the solenoid valve III5, and the solenoid valve IV12 are opened, the solenoid valve II4 and the solenoid valve V13 are closed, the refrigerant circulation pump I2 is turned on, the steam compression refrigeration subsystem is running, and the liquid refrigerant in the evaporator 8 of the refrigeration and cold storage integration evaporates and refrigerates, and the cold storage medium stores cold; at the same time, the refrigerant circulation pump II11 is turned on, the cold air blower 14 is turned on, and the cold in the cold storage medium is used to supply cold to the fresh-keeping warehouse;

[0039] In the refrigeration-cold storage mode, the solenoid valve I3 is opened, the solenoid valve II4, the solenoid valve III5, the solenoid valve IV12, and the solenoid valve V13 are closed, the refrigerant circulation pump I2 is turned on, the steam compression refrigeration subsystem with cold storage is running, the liquid refrigerant in the evaporator with integrated refrigeration and cold storage evaporates and refrigerates, the cold storage medium stores cold, the refrigerant circulation pump II11 is stopped, and the air cooler 14 is stopped;

[0040] In the cold storage-cooling supply mode, solenoid valve III5 and solenoid valve IV12 are opened, solenoid valve I3, solenoid valve II4 and solenoid valve V13 are closed, refrigerant circulation pump I2 is shut down, and the steam compression refrigeration subsystem with cold storage stops running to reduce the low power load. The refrigerant circulation pump II11 and the air cooler 14 are turned on to supply cold to the fresh-keeping warehouse using the cold energy stored in the cold storage medium during the night when electricity consumption is low.

[0041] The steam compression refrigeration subsystem with cold storage is the main cold source, and the dry-wet complementary cold supply tower 1 is the auxiliary cold source. According to the climatic conditions, the storage temperature and the cold load of the fresh-keeping warehouse, the steam compression refrigeration subsystem with cold storage and the dry-wet complementary cold supply tower 1 respectively supply cold to the fresh-keeping warehouse. When supplying cold to the fresh-keeping warehouse, the air cooler 14 is turned on, and the air from the fresh-keeping warehouse flows through the air cooler 14 to be cooled, and is sent to the fresh-keeping warehouse after the temperature is reduced.

[0042] Collect the outdoor air temperature and relative humidity, the storage temperature of the fresh-keeping warehouse, and the water temperature at the bottom of the dry-wet complementary cooling tower 1 in real time. According to the set air volume of the dry-wet complementary cooling tower 1, the flow rate of the refrigerant circulation pump Ⅱ2, the heat exchange area, the outdoor air temperature and relative humidity, simulate and calculate the cooling power, cooling temperature and cold load of the dry-wet complementary cooling tower 1. During the period when the dry-wet complementary cooling tower 1 can meet the cold load and temperature requirements of the fresh-keeping warehouse, the dry-wet complementary cooling tower 1 is used as the cold source to supply cold to the fresh-keeping warehouse. Otherwise, a steam compression refrigeration subsystem with cold storage is used as the cold source to supply cold to the fresh-keeping warehouse. The above data collection and calculation can be performed manually or automatically by the data acquisition system and the calculation module.

[0043] During the period when the outdoor temperature is high and the steam compression refrigeration subsystem with cold storage supplies cold to the fresh-keeping warehouse, the dry-wet complementary cooling tower 1 cools the cooling medium of the liquid-cooled condenser 10 in the wet working mode. In this mode, the water pump 1010 and the fan 102 are both turned on; the solenoid valve I3, the solenoid valve III5, and the solenoid valve IV12 are turned on, and the solenoid valve II4 and the solenoid valve V13 are closed; the refrigerant circulation pump I2, the refrigerant circulation pump II11 and the cold air fan 14 are turned on, and the cold energy in the cold storage medium is used to supply cold to the fresh-keeping warehouse.

[0044] During the period when the outdoor air temperature is low and the dry-wet complementary cooling tower 1 can meet the cold load and temperature of the fresh-keeping warehouse in the wet working condition operation mode, the dry-wet complementary cooling tower 1 supplies cold to the fresh-keeping warehouse in the wet working condition operation mode, and the steam compression refrigeration subsystem with cold storage is shut down. In this mode, the water pump 1010 and the fan 102 are both turned on; the solenoid valve II4 and the solenoid valve V13 are turned on, and the solenoid valve I3, the solenoid valve III5, and the solenoid valve IV12 are closed; the refrigerant circulation pump II11 is shut down, and the refrigerant circulation pump I2 and the cold air fan 14 are turned on. The water whose temperature is reduced in the wet working condition of the dry-wet complementary cooling tower 1 is used to cool the refrigerant, and the cooled refrigerant is used to supply cold to the fresh-keeping warehouse.

[0045] During the period when the outdoor air temperature is very low and the dry-wet complementary cooling tower can meet the cold load and temperature requirements of the fresh-keeping warehouse in the dry working mode, the dry-wet complementary cooling tower room supplies cold to the fresh-keeping warehouse in the dry working mode, and the steam compression refrigeration subsystem with cold storage is shut down. In this mode, the water pump 1010 is shut down, and the fan 102 is turned on; the solenoid valve Ⅱ4 and the solenoid valve Ⅴ13 are turned on, and the solenoid valve Ⅰ3, the solenoid valve Ⅲ5, and the solenoid valve Ⅳ12 are closed; the refrigerant circulation pump Ⅱ11 is shut down, and the refrigerant circulation pump Ⅰ2 and the cold air blower 14 are turned on. The outdoor air under the dry working condition of the dry-wet complementary cooling tower 1 is used to cool the refrigerant, and the cooled refrigerant is used to supply cold to the fresh-keeping warehouse.

[0046] The beneficial effects of the present invention are:

[0047] 1. The present invention uses a steam compression refrigeration subsystem with cold storage as the main cold source and a dry-wet complementary cooling tower as the auxiliary cold source, making full use of the outdoor air natural cold source and direct evaporative cooling of water. While ensuring the temperature of the warehouse and the cooling demand, it effectively reduces the operating time of the steam compression refrigeration subsystem, reduces energy consumption, and reduces operating costs;

[0048] 2. The steam compression refrigeration subsystem with cold storage can be operated in three modes: refrigeration-cold storage-cooling, refrigeration-cold storage, and cooling by the stored cold. Cold storage is used to smooth the peak of power load, which not only reduces energy consumption costs, but also reduces power load;

[0049] 3. According to the climate conditions, the temperature of the fresh-keeping warehouse and the cooling load, the dry-wet complementary cooling tower can be operated in wet and dry working modes respectively. In the dry working mode, the water pump does not need to be operated, which further reduces energy consumption and operating costs;

[0050] 4. The evaporator with integrated refrigeration and cold storage adopts an integrated refrigeration and cold storage structure, which can effectively reduce manufacturing costs and reduce cooling loss;

[0051] 5. The cooling medium of the liquid-cooled condenser is cooled by a dry-wet complementary cooling tower under wet conditions to effectively improve the cooling effect, thereby improving the refrigeration performance of the steam compression refrigeration subsystem and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the composition of the dual-cold-source multi-mode refrigeration and cold-storage integrated fresh-keeping warehouse cooling system of the present invention;

[0053] Figure 2 It is a structural schematic diagram of a dry-wet complementary cooling tower;

[0054] Figure 3 It is a schematic diagram of the structure of an evaporator with integrated refrigeration and cold storage.

[0055] Figure 1 The reference numerals represent in sequence: 1-dry-wet complementary cooling tower, 2-refrigerant circulation pump I, 3-electromagnetic valve I, 4-electromagnetic valve II, 5-electromagnetic valve III, 6-refrigerant pipeline, 7-compressor, 8-evaporator with integrated refrigeration and cold storage, 9-throttle valve, 10-liquid-cooled condenser, 11-refrigerant circulation pump II, 12-electromagnetic valve IV, 13-electromagnetic valve V, 14-cooling fan, 15-refrigerant pipeline;

[0056] Figure 2 The reference numerals in the figure represent in sequence: 101-glass fiber reinforced plastic shell, 102-fan, 103-spray pipe, 104-refrigerant cooling coil inlet joint, 105-refrigerant cooling coil, 106-refrigerant cooling coil outlet joint, 107-air inlet with protective net, 108-water supply pipe, 109-circulating water pipe, 1010-water pump, 1011-drain pipe, 1012-drain valve, 1013-water level controller, 1014-hydrophilic polymer heat and moisture exchange component;

[0057] Figure 3 The numbers in the figure represent in sequence: 801-insulation shell, 802-refrigerant cooling coil inlet connector, 803-refrigerant evaporator coil inlet connector, 804-refrigerant evaporator coil outlet connector, 805-refrigerant cooling coil outlet connector, 806-refrigerant evaporator coil, 807-refrigerant cooling coil, 808-exhaust pipe, 809-refrigerant filling port, 8010-refrigerant drain valve, 8011-refrigerant drain pipe. DETAILED DESCRIPTION

[0058] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0059] Example 1: Figure 1As shown, a dual-cold-source multi-mode refrigeration and cold storage integrated cold supply system for fresh-keeping warehouses includes a steam compression refrigeration subsystem with cold storage and a dry-wet complementary cold supply tower 1. The steam compression refrigeration subsystem with cold storage is provided with an evaporator 8 with integrated refrigeration and cold storage; the steam compression refrigeration subsystem with cold storage is the main cold source, and the dry-wet complementary cold supply tower 1 is the auxiliary cold source. According to the climatic conditions, the temperature of the fresh-keeping warehouse and the cold load, the steam compression refrigeration subsystem with cold storage and the dry-wet complementary cold supply tower 1 respectively supply cold to the fresh-keeping warehouse. When supplying cold to the fresh-keeping warehouse, the air cooler 14 is turned on, and the air from the fresh-keeping warehouse flows through the air cooler 14 to be cooled, and is then sent to the fresh-keeping warehouse after the temperature is lowered;

[0060] Collect the outdoor air temperature and relative humidity, the storage temperature of the fresh-keeping warehouse, and the water temperature at the bottom of the dry-wet complementary cooling tower 1 in real time. According to the set air volume of the dry-wet complementary cooling tower 1, the flow rate of the refrigerant circulation pump Ⅱ2, the heat exchange area, the outdoor air temperature and relative humidity, simulate and calculate the cooling power, cooling temperature and cold load of the dry-wet complementary cooling tower 1. During the period when the dry-wet complementary cooling tower 1 can meet the cold load and temperature requirements of the fresh-keeping warehouse, the dry-wet complementary cooling tower 1 is used as the cold source to supply cold to the fresh-keeping warehouse. On the contrary, a steam compression refrigeration subsystem with cold storage is used as the cold source to supply cold to the fresh-keeping warehouse. The above data collection and calculation can be performed manually or automatically by the data acquisition system and the calculation module;

[0061] When the vapor compression refrigeration subsystem with cold storage operates in the refrigeration-cold storage-cold supply mode, the liquid refrigerant in the evaporator 8 with integrated refrigeration and cold storage evaporates to cool, the cold storage medium stores cold, and the cold in the cold storage medium is used to supply cold to the fresh-keeping warehouse;

[0062] When the vapor compression refrigeration subsystem with cold storage operates in the refrigeration-cold storage mode, the liquid refrigerant in the evaporator 8 with integrated refrigeration and cold storage evaporates for refrigeration, and the cold storage medium stores cold;

[0063] When the vapor compression refrigeration subsystem with cold storage operates in the cold storage-cold supply mode, the cold energy stored in the cold storage medium in the evaporator 8 with integrated refrigeration and cold storage is used to supply cold to the fresh-keeping warehouse.

[0064] During the period when the outdoor temperature is high and the steam compression refrigeration subsystem with cold storage supplies cold to the fresh-keeping warehouse, the dry-wet complementary cooling tower 1 cools the cooling medium of the liquid-cooled condenser 10 in the wet working mode;

[0065] During the period when the outdoor air temperature is low and the dry-wet complementary cooling tower 1 can meet the cooling load and temperature requirements of the fresh-keeping warehouse in the wet operating mode, the dry-wet complementary cooling tower 1 supplies cooling to the fresh-keeping warehouse in the wet operating mode, the steam compression refrigeration subsystem with cold storage is shut down, and the water whose temperature is reduced in the wet operating mode of the dry-wet complementary cooling tower 1 is used to cool the refrigerant, and the cooled refrigerant is used to supply cooling to the fresh-keeping warehouse;

[0066] During the period when the outdoor air temperature is low and the dry-wet complementary cooling tower 1 can meet the cooling load and temperature requirements of the fresh-keeping warehouse in the dry operating mode, the dry-wet complementary cooling tower 1 supplies cooling to the fresh-keeping warehouse in the dry operating mode, the steam compression refrigeration subsystem with cold storage is shut down, and the dry-wet complementary cooling tower 1 uses the outdoor air under dry conditions to cool the refrigerant, and the cooled refrigerant is used to supply cooling to the fresh-keeping warehouse.

[0067] The steam compression refrigeration subsystem with cold storage includes: a refrigerant pipeline 6, a compressor 7, an evaporator 8 with integrated refrigeration and cold storage, a throttle valve 9, and a liquid-cooled condenser 10; the present invention also includes a refrigerant circulation pump I2, a refrigerant circulation pump II11, a cooling fan 14, a solenoid valve I3, a solenoid valve II4, a solenoid valve III5, a solenoid valve IV12, a solenoid valve V13, and a refrigerant pipeline 15;

[0068] The outlet of the compressor 7 is connected to the inlet of the liquid-cooled condenser 10 through the refrigerant pipe 6, the outlet of the liquid-cooled condenser 10 is connected to the inlet of the throttle valve 9 through the refrigerant pipe 6, the outlet of the throttle valve 9 is connected to the inlet of the evaporator 8 integrated with refrigeration and cold storage through the refrigerant pipe 6, and the outlet of the evaporator 8 integrated with refrigeration and cold storage is connected to the inlet of the compressor 7 through the refrigerant pipe 6.

[0069] The outlet of the refrigerant circulation pump I2 is connected to the refrigerant cooling coil inlet joint 104 of the dry-wet complementary cooling tower 1, and the refrigerant cooling coil outlet joint 106 of the dry-wet complementary cooling tower 1 is respectively connected to the refrigerant inlet of the liquid-cooled condenser 10 in the steam compression refrigeration subsystem with cold storage and the inlet of the solenoid valve V13, and the refrigerant outlet of the liquid-cooled condenser 10 in the steam compression refrigeration subsystem with cold storage is connected to the inlet of the solenoid valve I3, and the outlet of the solenoid valve I3 is connected to the inlet of the refrigerant circulation pump I2;

[0070] The outlet of the solenoid valve V13 is connected to the air cooler 14, the air cooler 14 is connected to the solenoid valve II4 through the refrigerant pipe 15, and the solenoid valve II4 is connected to the inlet of the refrigerant circulation pump I2;

[0071] The outlet of solenoid valve V13 is also connected to solenoid valve IV12, solenoid valve IV12 is connected to refrigerant circulation pump II11, refrigerant circulation pump II11 is connected to the evaporator 8 with integrated refrigeration and cold storage in the steam compression refrigeration subsystem with cold storage, the evaporator 8 with integrated refrigeration and cold storage is connected to solenoid valve III5, and solenoid valve III5 is connected to solenoid valve II4.

[0072] The cooling medium of the liquid-cooled condenser 10 is cooled by the dry-wet complementary cooling tower 1 under wet conditions to effectively improve the cooling effect, thereby improving the refrigeration performance of the steam compression refrigeration subsystem and reducing energy consumption. The cooling medium can be ethylene glycol aqueous solution or pure water. The refrigeration capacity generated by the evaporation of the liquid refrigerant in the evaporator 8 with integrated refrigeration and cold storage is stored in the evaporator 8 with integrated refrigeration and cold storage by the cold storage medium, and the cold storage medium is pure water.

[0073] As a further solution of the present invention, the dry-wet complementary cooling tower 1 comprises: a glass fiber reinforced plastic shell 101, a fan 102, a spray pipe 103, a refrigerant cooling coil inlet joint 104, a refrigerant cooling coil 105, a refrigerant cooling coil outlet joint 106, an air inlet 107 with a protective net, a water supply pipe 108, a circulating water pipe 109, a water pump 1010, a drain pipe 1011, a drain valve 1012, a water level controller 1013, and a hydrophilic polymer heat and moisture exchange component 1014. The water level controller 1013 adopts a float valve to automatically replenish water to the dry-wet complementary cooling tower 1. The refrigerant adopts a liquid with excellent low-temperature fluidity such as ethylene glycol aqueous solution and purified water;

[0074] The bottom of the FRP shell 101 is provided with a drain pipe 1011, and a drain valve 1012 is provided on the drain pipe 1011; the FRP shell 101 is also provided with a circulating water pipe 109, the circulating water pipe 109 is connected to the water pump 1010, the water pump 1010 is connected to the spray pipe 103 through the circulating water pipe 109, and the spray pipe 103 is arranged at the upper part of the FRP shell 101; the middle and lower part of the FRP shell 101 is provided with an air inlet 107 with a protective net, and the end of the water supply pipe 108 passes through the air inlet 107 with a protective net and is located in the FRP shell 101, and the water supply pipe 108 passes through the air inlet 107 with a protective net and is located in the FRP shell 101, and the water supply pipe 108 passes through the air inlet 107 with a protective net and is located in the FRP shell 101, and the water supply pipe 108 passes through the air inlet 107 with a protective net. A water level controller 1013 is provided at the end of the water pipe 108; a refrigerant cooling coil inlet joint 104 and a refrigerant cooling coil outlet joint 106 are respectively provided inside the FRP shell 101, and the refrigerant cooling coil inlet joint 104 and the refrigerant cooling coil outlet joint 106 are connected through the refrigerant cooling coil 105; a hydrophilic polymer heat and moisture exchange component 1014 is provided inside the FRP shell 101, between the spray pipe 103 and the refrigerant cooling coil 105; a fan 102 is provided on the top of the FRP shell 101.

[0075] As a further solution of the present invention, according to the climatic conditions, the storage temperature of the fresh-keeping storage and the cooling load, the dry-wet complementary cooling tower 1 can be operated in the wet working mode and the dry working mode respectively;

[0076] In the wet working mode, the water pump 1010 and the fan 102 are both turned on. Under the action of the water pump 1010, water is sprayed out from the spray pipe 103 and enters the hydrophilic polymer heat and moisture exchange component 1014 by its own gravity. At the same time, under the action of the fan 102, the outdoor air enters the hydrophilic polymer heat and moisture exchange component 1014 through the air inlet 107 with a protective net. The air and water are in direct contact to absorb water vapor, and then discharged to the outside from the top of the dry-wet complementary cooling tower 1. Part of the liquid water evaporates, and the unevaporated Liquid water is cooled, so the water temperature is reduced. The water with reduced temperature exchanges heat with the coolant cooling coil 105 to cool the coolant, and then enters the bottom of the dry-wet complementary cooling tower 1. Under the action of the water pump 1010, it flows through the circulating water pipe 109 and is sprayed out from the spray pipe 103 again. The surface of the hydrophilic polymer heat and moisture exchange component 1014 is sprayed with a hydrophilic polymer film to increase the contact area between air and water, enhance the heat and moisture exchange between water and air, and thus improve the direct evaporative cooling performance of the dry-wet complementary cooling tower 1.

[0077] In the dry working mode, the fan 102 is turned on and the water pump 1010 is stopped; under the action of the fan 102, the outdoor air flows through the refrigerant cooling coil 105 through the air inlet 107 with a protective net, making full use of the low-temperature outdoor air to moderately cool the refrigerant.

[0078] As a further solution of the present invention, the evaporator 8 with integrated refrigeration and cold storage includes: a heat preservation shell 801, a coolant exchange coil inlet joint 802, a refrigerant evaporation coil inlet joint 803, a refrigerant evaporation coil outlet joint 804, a coolant exchange coil outlet joint 805, a refrigerant evaporation coil 806, a coolant exchange coil 807, an exhaust pipe 808, a coolant filling port 809, a coolant drain valve 8010, and a coolant drain pipe 8011;

[0079] The top of the insulation shell 801 is provided with an exhaust pipe 808 and a coolant filling port 809, and the exhaust pipe 808 and the coolant filling port 809 are respectively arranged on the left and right sides of the insulation shell 801; a coolant exchange coil inlet joint 802 is arranged in the middle and upper part of the right side of the insulation shell 801, a refrigerant evaporation coil inlet joint 803 is arranged in the middle and lower part of the right side of the insulation shell 801, a refrigerant evaporation coil outlet joint 804 is arranged in the middle and upper part of the left side of the insulation shell 801, and a refrigerant evaporation coil outlet joint 804 is arranged in the middle and lower part of the left side of the insulation shell 801. The refrigerant exchange coil outlet joint 805, the refrigerant evaporation coil 806 is installed inside the insulation shell 801 through the refrigerant evaporation coil inlet joint 803 and the refrigerant evaporation coil outlet joint 804; the secondary refrigerant exchange coil 807 is installed inside the insulation shell 801 through the secondary refrigerant exchange coil inlet joint 802 and the secondary refrigerant exchange coil outlet joint 805; the secondary refrigerant drain pipe 8011 is provided at the bottom of the insulation shell 801, and the secondary refrigerant drain pipe 8011 is provided with a secondary refrigerant drain valve 8010;

[0080] The refrigerant evaporation coil inlet connector 803 is connected to the outlet of the throttle valve 9;

[0081] The refrigerant evaporation coil outlet connector 804 is connected to the air intake port of the compressor 7 through the refrigerant pipeline 6;

[0082] The refrigerant exchange coil inlet connector 802 is connected to the outlet of the refrigerant circulation pump II 11;

[0083] The refrigerant exchange coil outlet connector 805 is connected to the inlet of the solenoid valve III5.

[0084] As a further solution of the present invention, the evaporator 8 with integrated refrigeration and cold storage adopts an integrated refrigeration and cold storage structure to effectively reduce its manufacturing cost and reduce the loss of cold capacity. At the same time, cold storage is used to smooth the peak of power load and reduce energy consumption costs. The liquid refrigerant from the refrigerant evaporator coil inlet joint 803 and the outlet of the throttle valve 9 in the refrigerant evaporator coil 806 exchanges heat with the refrigerant in the refrigerant exchange coil 807, absorbs heat from the refrigerant and evaporates, and the generated cooling capacity is stored in the cold storage medium of the evaporator 8 with integrated refrigeration and cold storage. The gaseous refrigerant after absorbing heat and vaporization enters the suction port of the compressor 7 through the refrigerant evaporator coil outlet joint 804 for compression. The compressed high-pressure gaseous refrigerant enters the liquid-cooled condenser 10 and exchanges heat with the refrigerant cooled by the dry-wet complementary cooling tower 1. The high-pressure gaseous refrigerant releases heat at a lower temperature and condenses into liquid refrigerant. The liquid refrigerant enters the refrigerant evaporator coil inlet joint 803 and the refrigerant evaporator coil 806 through the throttle valve 9.

[0085] Under the traction of the refrigerant circulation pump Ⅱ11, the refrigerant enters the refrigerant cooling coil 807 through the refrigerant cooling coil inlet joint 802 to exchange heat with the cold storage medium. The refrigerant with reduced temperature enters the cold air fan 14 through the refrigerant cooling coil outlet joint 805 and the solenoid valve Ⅲ5 to exchange heat with the air in the fresh-keeping room to provide cooling to the fresh-keeping room.

[0086] As a further solution of the present invention, the steam compression refrigeration subsystem with cold storage operates in three modes: refrigeration-cold storage-cold supply, refrigeration-cold storage, and cold storage-cold supply:

[0087] During the night when electricity consumption is low, the outdoor temperature is high, and there is a demand for cold storage in the fresh-keeping warehouse, the steam compression refrigeration subsystem with cold storage operates in the refrigeration-cold storage-cold supply mode. In the refrigeration-cold storage-cold supply mode, solenoid valve I3, solenoid valve III5, and solenoid valve IV12 are opened, solenoid valve II4 and solenoid valve V13 are closed, and the refrigerant circulation pump I2 is turned on. The steam compression refrigeration subsystem operates, and the liquid refrigerant in the evaporator 8 with integrated refrigeration and cold storage evaporates and refrigerates, and the cold storage medium stores cold; at the same time, the refrigerant circulation pump II11 is turned on, and the air cooler 14 is turned on, using the cold in the cold storage medium to supply cold to the fresh-keeping warehouse;

[0088] During the night when electricity consumption is low, the outdoor temperature is high, and there is no demand for cold storage, the steam compression refrigeration subsystem with cold storage operates in the refrigeration-cold storage mode. In the refrigeration-cold storage mode, solenoid valve I3 is opened, solenoid valve II4, solenoid valve III5, solenoid valve IV12, and solenoid valve V13 are closed, the refrigerant circulation pump I2 is opened, the steam compression refrigeration subsystem with cold storage operates, the liquid refrigerant in the evaporator with integrated refrigeration and cold storage evaporates and refrigerates, the cold storage medium stores cold, the refrigerant circulation pump II11 is shut down, and the air cooler 14 is shut down;

[0089] During the peak hours of electricity consumption during the day, when the outdoor temperature is high and there is a demand for cold storage in the fresh-keeping warehouse, the steam compression refrigeration subsystem with cold storage operates in the cold storage-cold supply mode. In the cold storage-cold supply mode, solenoid valve III5 and solenoid valve IV12 are opened, solenoid valve I3, solenoid valve II4, and solenoid valve V13 are closed, and the refrigerant circulation pump I2 is shut down. The steam compression refrigeration subsystem with cold storage stops running to reduce the low power load, and the refrigerant circulation pump II11 and the air cooler 14 are turned on to supply cold to the fresh-keeping warehouse using the cold stored in the cold storage medium during the low electricity consumption at night.

[0090] During the period when the outdoor temperature is high and the steam compression refrigeration subsystem with cold storage supplies cold to the fresh-keeping warehouse, the dry-wet complementary cooling tower 1 cools the cooling medium of the liquid-cooled condenser 10 in the wet working mode. In this mode, the water pump 1010 and the fan 102 are both turned on; the solenoid valve I3, the solenoid valve III5, and the solenoid valve IV12 are turned on, and the solenoid valve II4 and the solenoid valve V13 are closed; the refrigerant circulation pump I2, the refrigerant circulation pump II11 and the cold air fan 14 are turned on, and the cold energy in the cold storage medium is used to supply cold to the fresh-keeping warehouse.

[0091] During the period when the outdoor air temperature is low and the dry-wet complementary cooling tower 1 can meet the cold load and temperature of the fresh-keeping warehouse in the wet working condition operation mode, the dry-wet complementary cooling tower 1 supplies cold to the fresh-keeping warehouse in the wet working condition operation mode, and the steam compression refrigeration subsystem with cold storage is shut down. In this mode, the water pump 1010 and the fan 102 are both turned on; the solenoid valve II4 and the solenoid valve V13 are turned on, and the solenoid valve I3, the solenoid valve III5, and the solenoid valve IV12 are closed; the refrigerant circulation pump II11 is shut down, and the refrigerant circulation pump I2 and the cold air fan 14 are turned on. The water whose temperature is reduced in the wet working condition of the dry-wet complementary cooling tower 1 is used to cool the refrigerant, and the cooled refrigerant is used to supply cold to the fresh-keeping warehouse.

[0092] During the period when the outdoor air temperature is very low and the dry-wet complementary cooling tower can meet the cold load and temperature requirements of the fresh-keeping warehouse in the dry working mode, the dry-wet complementary cooling tower room supplies cold to the fresh-keeping warehouse in the dry working mode, and the steam compression refrigeration subsystem with cold storage is shut down. In this mode, the water pump 1010 is shut down, and the fan 102 is turned on; the solenoid valve Ⅱ4 and the solenoid valve Ⅴ13 are turned on, and the solenoid valve Ⅰ3, the solenoid valve Ⅲ5, and the solenoid valve Ⅳ12 are closed; the refrigerant circulation pump Ⅱ11 is shut down, and the refrigerant circulation pump Ⅰ2 and the cold air blower 14 are turned on. The outdoor air under the dry working condition of the dry-wet complementary cooling tower 1 is used to cool the refrigerant, and the cooled refrigerant is used to supply cold to the fresh-keeping warehouse.

[0093] The specific embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A dual-cold-source multi-mode refrigeration and cold storage integrated fresh-keeping warehouse cooling system, characterized in that: It comprises a steam compression refrigeration subsystem with cold storage, wherein the steam compression refrigeration subsystem with cold storage is provided with an evaporator (8) integrating refrigeration and cold storage; When the vapor compression refrigeration subsystem with cold storage operates in a refrigeration-cold storage-cold supply mode, the liquid refrigerant in the evaporator (8) with integrated refrigeration and cold storage evaporates to cool, the cold storage medium stores cold, and the cold in the cold storage medium is used to supply cold to the fresh-keeping warehouse; When the vapor compression refrigeration subsystem with cold storage operates in a refrigeration-cold storage mode, the liquid refrigerant in the evaporator (8) with integrated refrigeration and cold storage evaporates to cool, and the cold storage medium stores cold; When the steam compression refrigeration subsystem with cold storage operates in a cold storage-cold supply mode, the cold amount stored in the cold storage medium in the evaporator (8) with integrated refrigeration and cold storage is used to supply cold to the fresh-keeping warehouse.

2. According to claim 1, a dual-cold-source multi-mode refrigeration and cold storage integrated fresh-keeping warehouse cooling system is characterized by: It also includes a dry-wet complementary cooling tower (1); During the period when the outdoor temperature is high and the steam compression refrigeration subsystem with cold storage supplies cold air to the fresh-keeping warehouse, the dry-wet complementary cooling tower (1) cools the cooling medium of the liquid-cooled condenser (10) in a wet operating mode; During a period when the outdoor air temperature is low and the dry-wet complementary cooling tower (1) can meet the cooling load and temperature requirements of the fresh-keeping warehouse in the wet operating mode, the dry-wet complementary cooling tower (1) supplies cooling to the fresh-keeping warehouse in the wet operating mode, the steam compression refrigeration subsystem with cold storage is shut down, and the coolant is cooled by the water whose temperature is reduced in the wet operating mode of the dry-wet complementary cooling tower (1), and the cooled coolant is used to supply cooling to the fresh-keeping warehouse; During a period when the outdoor air temperature is low and the dry-wet complementary cooling tower (1) can meet the cooling load and temperature requirements of the fresh-keeping warehouse in a dry operating mode, the dry-wet complementary cooling tower (1) supplies cooling to the fresh-keeping warehouse in a dry operating mode, the steam compression refrigeration subsystem with cold storage is shut down, and the dry-wet complementary cooling tower (1) uses outdoor air in a dry operating mode to cool the refrigerant, and the cooled refrigerant is used to supply cooling to the fresh-keeping warehouse.

3. According to claim 2, a dual-cold-source multi-mode refrigeration and cold storage integrated fresh-keeping warehouse cooling system is characterized by: The steam compression refrigeration subsystem with cold storage comprises: a refrigerant pipeline (6), a compressor (7), an evaporator (8) integrating refrigeration and cold storage, a throttle valve (9), and a liquid-cooled condenser (10); The outlet of the compressor (7) is connected to the inlet of a liquid-cooled condenser (10) via a refrigerant pipe (6); the outlet of the liquid-cooled condenser (10) is connected to the inlet of a throttle valve (9) via a refrigerant pipe (6); the outlet of the throttle valve (9) is connected to the inlet of an evaporator (8) with integrated refrigeration and cold storage via a refrigerant pipe (6); and the outlet of the evaporator (8) with integrated refrigeration and cold storage is connected to the inlet of the compressor (7) via a refrigerant pipe (6).

4. The dual-cold-source multi-mode refrigeration and cold storage integrated cold storage cooling system according to claim 3 is characterized in that: It also includes a refrigerant circulation pump I (2), a refrigerant circulation pump II (11), a cooling fan (14), a solenoid valve I (3), a solenoid valve II (4), a solenoid valve III (5), a solenoid valve IV (12), a solenoid valve V (13), and a refrigerant pipeline (15); The outlet of the refrigerant circulation pump I (2) is connected to the refrigerant cooling coil inlet joint (104) of the dry-wet complementary cooling tower (1), the refrigerant cooling coil outlet joint (106) of the dry-wet complementary cooling tower (1) is respectively connected to the refrigerant inlet of the liquid-cooled condenser (10) in the steam compression refrigeration subsystem with cold storage and the inlet of the solenoid valve V (13), the refrigerant outlet of the liquid-cooled condenser (10) in the steam compression refrigeration subsystem with cold storage is connected to the inlet of the solenoid valve I (3), and the outlet of the solenoid valve I (3) is connected to the inlet of the refrigerant circulation pump I (2); The outlet of the solenoid valve V (13) is connected to the air cooler (14), the air cooler (14) is connected to the solenoid valve II (4) through the refrigerant pipe (15), and the solenoid valve II (4) is connected to the inlet of the refrigerant circulation pump I (2); The outlet of the solenoid valve V (13) is also connected to the solenoid valve IV (12), the solenoid valve IV (12) is connected to the refrigerant circulation pump II (11), the refrigerant circulation pump II (11) is connected to the evaporator (8) with integrated refrigeration and cold storage in the steam compression refrigeration subsystem with cold storage, the evaporator (8) with integrated refrigeration and cold storage is connected to the solenoid valve III (5), and the solenoid valve III (5) is connected to the solenoid valve II (4).

5. The dual-cold-source multi-mode refrigeration and cold storage integrated cold storage cooling system according to claim 2 is characterized in that: The dry-wet complementary cooling tower (1) comprises: a glass fiber reinforced plastic shell (101), a fan (102), a spray pipe (103), a refrigerant cooling coil inlet joint (104), a refrigerant cooling coil (105), a refrigerant cooling coil outlet joint (106), an air inlet with a protective net (107), a water supply pipe (108), a circulating water pipe (109), a water pump (1010), a drain pipe (1011), a drain valve (1012), a water level controller (1013), and a hydrophilic polymer heat and moisture exchange component (1014); The bottom of the FRP shell (101) is provided with a drain pipe (1011), and a drain valve (1012) is provided on the drain pipe (1011); the FRP shell (101) is also provided with a circulating water pipe (109), the circulating water pipe (109) is connected to a water pump (1010), the water pump (1010) is connected to a spray pipe (103) through the circulating water pipe (109), and the spray pipe (103) is provided at the upper part of the FRP shell (101); an air inlet (107) with a protective net is provided at the middle and lower part of the FRP shell (101), and a water supply pipe (108) passes through the air inlet (107) with the protective net and the end thereof is located at the FRP shell (101). ), a water level controller (1013) is arranged at the end of the water supply pipe (108); a refrigerant cooling coil inlet joint (104) and a refrigerant cooling coil outlet joint (106) are respectively arranged inside the glass fiber reinforced plastic shell (101), and the refrigerant cooling coil inlet joint (104) and the refrigerant cooling coil outlet joint (106) are connected through the refrigerant cooling coil (105); a hydrophilic polymer heat and moisture exchange component (1014) is arranged inside the glass fiber reinforced plastic shell (101), between the spray pipe (103) and the refrigerant cooling coil (105); a fan (102) is arranged on the top of the glass fiber reinforced plastic shell (101).

6. The dual-cold-source multi-mode refrigeration and cold storage integrated cold storage cooling system according to claim 5 is characterized in that: According to the climatic conditions, the temperature of the fresh-keeping warehouse and the cooling load, the dry-wet complementary cooling tower (1) can be operated in a wet working mode or a dry working mode respectively; In the wet operating mode, the water pump (1010) and the fan (102) are both turned on. Under the action of the water pump (1010), water is sprayed out from the spray pipe (103) and enters the hydrophilic polymer heat and moisture exchange component (1014) by its own gravity. At the same time, under the action of the fan (102), outdoor air enters the hydrophilic polymer heat and moisture exchange component (1014) through the air inlet (107) with a protective net. The air and water are in direct contact to absorb water vapor, and then discharged to the outside from the top of the dry-wet complementary cooling tower (1). Part of the liquid water evaporates, and the unevaporated liquid water is cooled, so that the water temperature is reduced. The water with reduced temperature exchanges heat with the refrigerant cooling coil (105) to cool the refrigerant, and then enters the bottom of the dry-wet complementary cooling tower (1), flows through the circulating water pipe (109) under the action of the water pump (1010), and is sprayed out from the spray pipe (103) again; In the dry working mode, the fan (102) is turned on and the water pump (1010) is stopped; under the action of the fan (102), outdoor air flows through the refrigerant cooling coil (105) through the air inlet (107) with a protective net, making full use of the low-temperature outdoor air to moderately cool the refrigerant.

7. The dual-cold-source multi-mode refrigeration and cold storage integrated cold storage cooling system according to claim 1 is characterized by: The evaporator (8) with integrated refrigeration and cold storage comprises: a heat-insulating shell (801), a coolant exchange coil inlet joint (802), a refrigerant evaporation coil inlet joint (803), a refrigerant evaporation coil outlet joint (804), a coolant exchange coil outlet joint (805), a refrigerant evaporation coil (806), a coolant exchange coil (807), an exhaust pipe (808), a coolant filling port (809), a coolant drain valve (8010), and a coolant drain pipe (8011); The top of the insulation shell (801) is provided with an exhaust pipe (808) and a refrigerant filling port (809), and the exhaust pipe (808) and the refrigerant filling port (809) are respectively arranged on the left and right sides of the insulation shell (801); a refrigerant exchange coil inlet joint (802) is arranged at the middle and upper part of the right side of the insulation shell (801), a refrigerant evaporation coil inlet joint (803) is arranged at the middle and lower part of the right side of the insulation shell (801), a refrigerant evaporation coil outlet joint (804) is arranged at the middle and upper part of the left side of the insulation shell (801), and a refrigerant evaporation coil outlet joint (804) is arranged at the middle and lower part of the left side of the insulation shell (801). The refrigerant exchange coil outlet joint (805) and the refrigerant evaporation coil (806) are installed inside the insulation shell (801) through the refrigerant evaporation coil inlet joint (803) and the refrigerant evaporation coil outlet joint (804); the secondary refrigerant exchange coil (807) is installed inside the insulation shell (801) through the secondary refrigerant exchange coil inlet joint (802) and the secondary refrigerant exchange coil outlet joint (805); a secondary refrigerant drain pipe (8011) is provided at the bottom of the insulation shell (801), and a secondary refrigerant drain valve (8010) is provided on the secondary refrigerant drain pipe (8011); The refrigerant evaporation coil inlet connector (803) is connected to the outlet of the throttle valve (9); The refrigerant evaporation coil outlet joint (804) is connected to the air intake port of the compressor (7) via a refrigerant pipeline (6); The refrigerant exchange coil inlet connector (802) is connected to the outlet of the refrigerant circulation pump II (11); The refrigerant exchange coil outlet connector (805) is connected to the inlet of the solenoid valve III (5).

8. The dual-cold-source multi-mode refrigeration and cold storage integrated cold storage cooling system according to claim 7 is characterized in that: The evaporator (8) with integrated refrigeration and cold storage adopts an integrated refrigeration and cold storage structure; the liquid refrigerant from the refrigerant evaporator coil inlet joint (803) and the outlet of the throttle valve (9) in the refrigerant evaporator coil (806) performs heat exchange with the secondary refrigerant in the secondary refrigerant exchange coil (807), absorbs heat from the secondary refrigerant and evaporates, and the generated refrigeration capacity is stored in the cold storage medium of the evaporator (8) with integrated refrigeration and cold storage; the gaseous refrigerant after absorbing heat and vaporizing enters the air intake of the compressor (7) through the outlet joint (804) of the refrigerant evaporator coil for compression; the compressed high-pressure gaseous refrigerant enters the liquid-cooled condenser (10) and performs heat exchange with the secondary refrigerant cooled by the dry-wet complementary cooling tower (1); the high-pressure gaseous refrigerant releases heat at a lower temperature and condenses into liquid refrigerant; the liquid refrigerant enters the refrigerant evaporator coil inlet joint (803) and the refrigerant evaporator coil (806) through the throttle valve (9); Under the traction of the refrigerant circulation pump II (11), the refrigerant enters the refrigerant cooling coil (807) through the refrigerant cooling coil inlet joint (802) to exchange heat with the cold storage medium. The refrigerant with reduced temperature enters the cold air blower (14) through the refrigerant cooling coil outlet joint (805) through the solenoid valve III (5) to exchange heat with the air in the fresh-keeping warehouse and is used to supply cold to the fresh-keeping warehouse.

9. The dual-cold-source multi-mode refrigeration and cold storage integrated cold storage cooling system according to claim 1, characterized in that: The vapor compression refrigeration subsystem with cold storage operates in three modes: refrigeration-cold storage-cold supply, refrigeration-cold storage, and cold storage-cold supply: During the night when electricity consumption is low, outdoor temperature is high and there is a demand for cooling in the fresh-keeping warehouse, the steam compression refrigeration subsystem with cold storage operates in the cooling-cold storage-cooling supply mode; During the night when electricity consumption is low, outdoor temperature is high and there is no cooling demand in the fresh-keeping warehouse, the vapor compression refrigeration subsystem with cold storage operates in cooling-cold storage mode; During the peak hours of electricity consumption during the day, when the outdoor temperature is high and there is a demand for cooling in the fresh-keeping room, the vapor compression refrigeration subsystem with cold storage operates in the cold storage-cooling mode.

10. The dual-cold-source multi-mode refrigeration and cold storage integrated cold storage cooling system according to claim 9, characterized in that: In the refrigeration-cold storage-cold supply mode, the solenoid valve I (3), the solenoid valve III (5), and the solenoid valve IV (12) are opened, the solenoid valve II (4) and the solenoid valve V (13) are closed, the refrigerant circulation pump I (2) is turned on, the steam compression refrigeration subsystem is operated, the liquid refrigerant in the evaporator (8) integrated with refrigeration and cold storage evaporates and refrigerates, and the cold storage medium stores cold; At the same time, the refrigerant circulation pump II (11) is turned on, and the air cooler (14) is turned on to supply cold to the fresh-keeping store using the cold energy in the cold storage medium; In the refrigeration-cold storage mode, the solenoid valve I (3) is opened, the solenoid valve II (4), the solenoid valve III (5), the solenoid valve IV (12), and the solenoid valve V (13) are closed, the refrigerant circulation pump I (2) is turned on, the vapor compression refrigeration subsystem with cold storage is operated, the liquid refrigerant in the evaporator with integrated refrigeration and cold storage is evaporated for refrigeration, the cold storage medium is stored, the refrigerant circulation pump II (11) is stopped, and the air cooler is stopped (14); In the cold storage-cooling supply mode, solenoid valve III (5) and solenoid valve IV (12) are opened, solenoid valve I (3), solenoid valve II (4) and solenoid valve V (13) are closed, refrigerant circulation pump I (2) is shut down, and the steam compression refrigeration subsystem with cold storage stops running to reduce the low power load. Refrigerant circulation pump II (11) and the air cooler (14) are turned on to supply cold to the fresh-keeping warehouse by using the cold energy stored in the cold storage medium during the low power consumption at night.

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