A hot gas defrosting, refrigeration and dehumidification integrated device

Abstract

The utility model discloses a hot gas defrosting, refrigeration and dehumidification integrated equipment, including an indoor unit and an outdoor unit. The indoor unit includes a shell, a front air outlet, a rear air outlet, an evaporator, and a thermal balance condenser. A circulating fan is arranged in the rear air outlet, the evaporator is located on the inner side of the front air outlet, and the evaporator is located between the thermal balance condenser and the circulating fan. The outdoor unit includes a machine body, an external condenser, a compressor, a gas-liquid separator, a liquid storage device, and a filter. An open cavity is arranged on the upper side of the machine body, the external condenser is tiltedly arranged in the open cavity, a heat dissipation fan is arranged on one side of the open cavity, a frequency conversion controller is arranged on the machine body, and the frequency conversion controller is electrically connected to the circulating fan, the compressor, and the heat dissipation fan through wires. The advantages of the utility model are: stable temperature and humidity balance of the refrigeration environment, energy saving and environmental protection.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a hot gas defrosting, refrigeration and dehumidification integrated equipment. Background Art

[0002] The integrated refrigeration and dehumidification equipment is a device that combines refrigeration and dehumidification functions. The integrated refrigeration and dehumidification equipment works based on the refrigeration cycle and dehumidification principle. The refrigeration cycle is mainly composed of evaporative cooling, evaporator and condenser. The integrated refrigeration and dehumidification equipment integrates refrigeration and dehumidification functions. Through reasonable working methods and recycling of refrigerants, it can quickly reduce indoor temperature and humidity in a short time, and has high working efficiency and energy saving.

[0003] In a low-temperature environment, frost often forms on the surface of the evaporator due to excessively high ambient humidity, so the evaporator needs to be defrosted. For refrigeration dehumidifiers in low-temperature and low-humidity warehouses, the traditional electric defrosting method has a surface temperature of the electric heating tube of over 200°C, and part of the melted water evaporates, causing large fluctuations in the humidity and temperature of the warehouse. At this time, the relative humidity caused by defrosting can rise by up to 80%, and the electric defrosting method has high energy consumption, which is not conducive to responding to the standard requirements for energy conservation and emission reduction. Utility Model Content

[0004] The utility model provides a hot gas defrosting refrigeration and dehumidification integrated device to solve the problems of high energy consumption of the above-mentioned traditional refrigeration and defrosting integrated device and large fluctuations in humidity and temperature in the warehouse.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a hot gas defrosting refrigeration and dehumidification integrated device, comprising an indoor unit and an outdoor unit, the indoor unit comprising a shell, a front air outlet, a rear air outlet, an evaporator, and a thermal balance condenser, a circulating fan is arranged in the rear air outlet, the evaporator is located on the inner side of the front air outlet, and the evaporator is located between the thermal balance condenser and the circulating fan, the outdoor unit comprises a machine body, an external condenser, a compressor, a gas-liquid separator, a liquid storage, and a filter, an open cavity is arranged on the upper side of the machine body, the external condenser is obliquely arranged in the open cavity, a heat dissipation fan is arranged on one side of the open cavity, a frequency conversion controller is arranged on the machine body, and the frequency conversion controller is electrically connected to the circulating fan, the compressor, and the heat dissipation fan through wires respectively;

[0006] Among them, the compressor is connected with the external condenser, the liquid reservoir, the filter, the evaporator, and the gas-liquid separator in sequence, the compressor air supply pipeline is connected with the evaporator and the thermal balance condenser through pipelines respectively, and the thermal balance condenser is connected with the liquid reservoir through pipelines. The refrigeration, defrosting and dehumidification functions are realized respectively by switching the working circuit of the compressor and the working states of the evaporator and the thermal balance condenser.

[0007] As an improvement, a crankcase pressure regulating valve is connected between the compressor and the gas-liquid separator.

[0008] As an improvement, a refrigeration solenoid valve, a defrost solenoid valve and a dehumidification solenoid valve are respectively provided on the pipes between the compressor and the condenser, the evaporator and the thermal balance condenser, and a thermal expansion valve is provided on the pipe between the filter and the evaporator. The refrigeration solenoid valve, the defrost solenoid valve, the dehumidification solenoid valve and the thermal expansion valve are electrically connected to the frequency conversion controller through wires.

[0009] As an improvement, a temperature and humidity sensor is provided outside the inner unit, and a temperature sensor is provided outside the outer unit. The temperature and humidity sensor and the temperature sensor are electrically connected to the frequency conversion controller through wires respectively.

[0010] As an improvement, a drain pipe connected to the evaporator is provided in the inner unit, and the drain pipe extends to the outside of the inner unit.

[0011] As an improvement, the evaporator is connected to the compressor and the gas-liquid separator via a reversing tee.

[0012] The advantages of the utility model are: 1. Energy saving and environmental protection. The hot gas defrosting operation of the internal machine evaporator is carried out through the heat exchange of the system itself, replacing the heating defrosting operation of the transmission electric heating tube, thereby reducing the overall energy consumption of the equipment;

[0013] 2. Stabilize the temperature and humidity balance of the refrigeration environment, conduct real-time detection of the internal environment temperature and humidity during the defrosting process, adjust the power of the circulating fan and add a thermal balance condenser, which greatly reduces the fluctuation of temperature and humidity in the warehouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the structure of the external unit and the internal unit of the utility model.

[0016] Figure 3 It is a schematic diagram of the connection principle of the utility model.

[0017] As shown in the figure: 1. Inner unit; 2. Outer unit; 3. Shell; 4. Front air outlet; 5. Rear air outlet; 6. Evaporator; 7. Thermal balance condenser; 8. Circulation fan; 9. Machine body; 10. External condenser; 11. Compressor; 12. Gas-liquid separator; 13. Liquid storage tank; 14. Filter; 15. Open cavity; 16. Cooling fan; 17. Frequency conversion controller; 18. Crankcase pressure regulating valve; 19. Refrigeration solenoid valve; 20. Defrost solenoid valve; 21. Dehumidification solenoid valve; 22. Thermal expansion valve; 23. Temperature and humidity sensor; 24. Temperature sensor; 25. Drain pipe; 26. Reversing tee. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] Combined with Figure 1 , Figure 2 , Figure 3 A hot air defrosting, refrigeration and dehumidification integrated device, comprising an indoor unit 1 and an outdoor unit 2, wherein the indoor unit 1 comprises a shell 3, a front air port 4, a rear air port 5, an evaporator 6, and a thermal balance condenser 7, wherein a drain pipe 25 connected to the evaporator 6 is provided in the indoor unit 1, and the drain pipe 25 extends to the outside of the indoor unit 1, and a circulating fan 8 is provided in the rear air port 5, wherein the evaporator 6 is located inside the front air port 4, and the evaporator 6 is located between the thermal balance condenser 7 and the circulating fan 8, and the outdoor unit 2 comprises a body 9, an external condenser 10 , a compressor 11, a gas-liquid separator 12, a liquid storage 13, and a filter 14. The evaporator 6 is connected to the compressor 11 and the gas-liquid separator 12 through a reversing tee 26. An open cavity 15 is provided on the upper side of the machine body 9. The external condenser 10 is obliquely arranged in the open cavity 15. A heat dissipation fan 16 is provided on one side of the open cavity 15. A frequency conversion controller 17 is provided on the machine body 9. The frequency conversion controller 17 is electrically connected to the circulation fan 8, the compressor 11, and the heat dissipation fan 16 through wires;

[0020] Among them, the compressor 11 is connected with the external condenser 10, the liquid reservoir 13, the filter 14, the evaporator 6, and the gas-liquid separator 12 in sequence. The air supply pipeline of the compressor 11 is connected with the evaporator 6 and the thermal balance condenser 7 through pipelines respectively. The thermal balance condenser 7 is connected with the liquid reservoir 13 through pipelines. The refrigeration, defrosting and dehumidification functions are realized respectively by switching the working circuit of the compressor 11 and the working states of the evaporator 6 and the thermal balance condenser 7.

[0021] A crankcase pressure regulating valve 18 is connected between the compressor 11 and the gas-liquid separator 12. In the operation state of refrigeration conversion and dehumidification, the low pressure changes greatly and pressure protection is prone to occur. The crankcase pressure regulating valve 18 can make the equipment run more stably.

[0022] A refrigeration solenoid valve 19, a defrost solenoid valve 20, and a dehumidification solenoid valve 21 are respectively provided on the pipelines between the compressor 11 and the condenser, the evaporator 6, and the thermal balance condenser 7. A thermal expansion valve 22 is provided on the pipeline between the filter 14 and the evaporator 6. The refrigeration solenoid valve 19, the defrost solenoid valve 20, the dehumidification solenoid valve 21, and the thermal expansion valve 22 are electrically connected to the frequency conversion controller 17 through wires.

[0023] A temperature and humidity sensor 23 is provided on the outside of the indoor unit 1, and a temperature sensor 24 is provided on the outside of the outdoor unit 2. The temperature and humidity sensor 23 and the temperature sensor 24 are electrically connected to the frequency conversion controller 17 through wires, respectively. The temperature and humidity sensor 2320 detects the temperature and humidity of the refrigeration area outside the indoor unit 11, and the temperature sensor 2421 detects the ambient temperature of the outdoor unit 22.

[0024] In an implementable case, the temperature of the germplasm resource storehouse was measured at -4°C, 45%, the average relative humidity during the defrosting process was <60%, the hot air temperature in the generator was <40°C, and no water vapor was generated during the defrosting process.

[0025] During the specific implementation of the utility model, the compressor compresses the refrigerant from a low-temperature and low-pressure state to a high-temperature and high-pressure state, and the high-temperature and high-pressure refrigerant enters the condenser, and the refrigerant is cooled and condensed into a liquid state through heat dissipation (such as fan cooling) and enters the liquid storage tank. When the liquid refrigerant passes through the throttle valve, the pressure is reduced and becomes a low-temperature and low-pressure gas-liquid mixed state. The low-temperature and low-pressure refrigerant enters the evaporator, absorbs the surrounding heat and evaporates into a gas state, then returns to the gas-liquid separator and re-enters the compressor. The above is a refrigeration cycle system (the refrigeration solenoid valve is open during this process);

[0026] The defrost solenoid valve and dehumidification solenoid valve are opened, and the refrigerant in the compressor directly enters the evaporator and the thermal balance condenser. At this time, the heat overflows from the evaporator for defrosting. This process requires the frequency converter to adjust the power of the circulating fan to speed up the defrosting and dehumidification. The thermal balance condenser assists the dehumidification and defrosting process and keeps the ambient temperature stable. During dehumidification, the frequency converter is used to lower the evaporator temperature and increase the power of the circulating fan. The refrigerant that has passed through the evaporator and the thermal balance condenser returns to the compressor through the external condenser. During this process, the crankcase pressure regulating valve performs low-pressure protection and regulation.

[0027] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A hot gas defrosting, refrigeration and dehumidification integrated device, comprising an indoor unit (1) and an outdoor unit (2), characterized in that: The indoor unit (1) comprises a shell (3), a front air port (4), a rear air port (5), an evaporator (6), and a thermal balance condenser (7); a circulating fan (8) is arranged in the rear air port (5); the evaporator (6) is located on the inner side of the front air port (4); and the evaporator (6) is located between the thermal balance condenser (7) and the circulating fan (8); the outdoor unit (2) comprises a machine body (9), an external condenser (10), a compressor (11), a gas-liquid separator (12), a liquid storage device (13), and a filter (14); an open cavity (15) is arranged on the upper side of the machine body (9); the external condenser (10) is arranged obliquely in the open cavity (15); a heat dissipation fan (16) is arranged on one side of the open cavity (15); a frequency conversion controller (17) is arranged on the machine body (9); and the frequency conversion controller (17) is electrically connected to the circulating fan (8), the compressor (11), and the heat dissipation fan (16) through wires. The compressor (11) is connected in sequence to an external condenser (10), a liquid reservoir (13), a filter (14), an evaporator (6), and a gas-liquid separator (12); the air supply pipeline of the compressor (11) is connected to the evaporator (6) and a thermal balance condenser (7) through pipelines; and the thermal balance condenser (7) is connected to the liquid reservoir (13) through pipelines.

2. The hot gas defrosting, refrigeration and dehumidification integrated device according to claim 1, characterized in that: A crankcase pressure regulating valve (18) is connected between the compressor (11) and the gas-liquid separator (12).

3. The hot gas defrosting, refrigeration and dehumidification integrated device according to claim 1, characterized in that: A refrigeration solenoid valve (19), a defrost solenoid valve (20), and a dehumidification solenoid valve (21) are respectively provided on the pipelines between the compressor (11) and the condenser, the evaporator (6), and the thermal balance condenser (7); a thermal expansion valve (22) is provided on the pipeline between the filter (14) and the evaporator (6); and the refrigeration solenoid valve (19), the defrost solenoid valve (20), the dehumidification solenoid valve (21), and the thermal expansion valve (22) are electrically connected to the frequency conversion controller (17) via wires.

4. The hot gas defrosting, refrigeration and dehumidification integrated device according to claim 1, characterized in that: A temperature and humidity sensor (23) is provided on the outside of the indoor unit (1), and a temperature sensor (24) is provided on the outside of the outdoor unit (2). The temperature and humidity sensor (23) and the temperature sensor (24) are respectively electrically connected to the frequency conversion controller (17) via wires.

5. The hot gas defrosting, refrigeration and dehumidification integrated device according to claim 1, characterized in that: A liquid drain pipe (25) connected to the evaporator (6) is provided in the internal unit (1), and the liquid drain pipe (25) extends to the outside of the internal unit (1).

6. The hot gas defrosting, refrigeration and dehumidification integrated device according to claim 1, characterized in that: The evaporator (6) is connected to the compressor (11) and the gas-liquid separator (12) via a reversing tee (26).

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