Countercurrent efficient hot fluorine defrosting and deicing system

Abstract

The utility model discloses a countercurrent efficient hot fluorine defrosting and deicing system, and belongs to the technical field of refrigeration house deicing and defrosting systems. The hot fluorine defrosting and deicing system solves the problems that an existing hot fluorine defrosting and deicing technology is low in air supply pressure, the compressor cannot be inflated and supplemented, the liquid accumulation phenomenon is prone to being generated, the defrosting efficiency is low, and the compressor is prone to being damaged. A compressor oil component of a compressor is sequentially connected with a condenser, a liquid storage tank, a filter and a first fan through a liquid supply pipe, a compressor gas component of the compressor is connected with a compressor gas suction pipe, and the first fan is respectively connected with a compressor exhaust pipe and the compressor gas suction pipe through a three-way conversion valve. The liquid supply pipe, the compressor exhaust pipe and the compressor air suction pipe are connected through the high-pressure change-over valve. The countercurrent efficient hot fluorine defrosting and deicing system is good in defrosting effect, air supply of the compressor is sufficient, the problem of liquid accumulation cannot be generated, and the compressor cannot be damaged.

Description

Technical Field

[0001] This utility model belongs to the technical field of cold storage defrosting and de-icing systems, specifically relating to a counter-current high-efficiency hot fluorine defrosting and de-icing system. Background Technology

[0002] In cold storage, when air passes through the evaporator, the water vapor in the air condenses into water droplets because the temperature of the evaporator surface is lower than the dew point temperature of the air. These droplets then freeze and form frost. Frost and ice that are not dealt with for a long time will reduce refrigeration efficiency, increase energy consumption and electricity bills, easily damage the compressor unit, and affect the quality of goods in the cold storage.

[0003] Currently, hot-fluid defrosting involves refrigerant recirculation. When defrosting is needed, the system controls the refrigerant to flow from the condenser back to the evaporator, while simultaneously changing the flow direction, usually to the reverse. As the refrigerant flows through the evaporator, the Freon inside absorbs heat, melting the frost and the heat from the surrounding air, and begins to evaporate. This process raises the evaporator temperature, thus removing the frost layer. However, existing hot-fluid defrosting technologies suffer from low compressor suction pressure, resulting in insufficient compressor gas supply, low defrosting efficiency, increased energy consumption, and a tendency for liquid accumulation, potentially causing serious accidents that damage the compressor.

[0004] In addition, existing units operate at low pressure on the evaporator and high pressure on the condenser during cooling. When the defrosting mode is activated, the evaporator rapidly increases pressure and expands, causing contraction and expansion, which can easily lead to pipe bursts in severe cases.

[0005] Therefore, this application proposes a counter-current high-efficiency hot fluorine defrosting and de-icing system to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to solve the problems of low suction pressure, insufficient compressor gas supply leading to low defrosting efficiency, increased energy consumption, and potential liquid accumulation in existing hot-fluid defrosting and de-icing technologies, which can cause serious accidents such as compressor damage. A brief overview of this invention is provided below to offer a basic understanding of certain aspects of it. It should be understood that this overview is not an exhaustive summary of the invention. It is not intended to identify key or essential parts of the invention, nor is it intended to limit the scope of the invention.

[0007] The technical solution of this utility model:

[0008] The counter-current high-efficiency hot refrigerant defrosting and de-icing system includes a compressor, a high-pressure switching valve, a condenser, a liquid receiver, a filter, a three-way switching valve, and a first fan. The compressor oil separator of the compressor is connected to the condenser, the liquid receiver, the filter, and the first fan in sequence through the liquid supply pipe. The compressor gas separator of the compressor is connected to the compressor suction pipe. The first fan is connected to the compressor discharge pipe and the compressor suction pipe respectively through the three-way switching valve. The liquid supply pipe, the compressor discharge pipe, and the compressor suction pipe are connected through the high-pressure switching valve.

[0009] Furthermore, a shut-off valve is installed on the pipeline connecting the filter to the storage tank, and a solenoid valve is installed on the pipeline connecting the filter to the first blower.

[0010] Furthermore, the liquid supply pipe is provided with a parallel pipeline, and a second check valve is provided on the parallel pipeline. The second check valve is connected in parallel with the filter and the solenoid valve.

[0011] Furthermore, an expansion valve and a first check valve are installed on the pipeline connecting the first blower and the liquid supply pipe, with the expansion valve and the first check valve connected in parallel.

[0012] Furthermore, a first ball valve is installed on the pipeline connecting the compressor oil separator and the condenser, a second ball valve is installed on the compressor discharge pipe, and a third ball valve is installed on the compressor suction pipe.

[0013] Furthermore, it also includes a second and a third fan, with the first, second, and third fans connected in parallel.

[0014] Furthermore, the first fan is replaced by aluminum busbars, iron pipes, or copper pipes.

[0015] This utility model has the following beneficial effects:

[0016] 1. The counter-current high-efficiency hot fluorine defrosting and de-icing system of this utility model, after the fan surface is frosted during fan cooling, uses a combination of a high-pressure switching valve and a three-way switching valve to defrost the fan surface using a counter-current hot fluorine defrosting method. The compressor can receive sufficient gas supply, the medium circulation flow in the pipeline is large, the defrosting effect on the fan surface is good, the defrosting efficiency is high, the compressor has sufficient gas supply, there is no problem of liquid accumulation, and the compressor will not be damaged.

[0017] 2. The counter-current high-efficiency hot refrigerant defrosting and de-icing system of this utility model, under the action of the high-pressure switching valve and the three-way switching valve, when the evaporators such as fans or aluminum radiators switch from the refrigeration mode to the defrosting mode, the fans and aluminum radiators do not change from low pressure to high pressure instantaneously, but gradually change from low pressure to high pressure, so the fans or aluminum radiators will not have the major problem of pipe bursting. Attached Figure Description

[0018] Figure 1This is a schematic diagram of a single-fan counter-current high-efficiency thermal refrigerant defrosting and de-icing system;

[0019] Figure 2 This is a schematic diagram of a multi-fan counter-current high-efficiency hot fluorine defrosting and de-icing system;

[0020] Figure 3 This is a schematic diagram of a counter-current high-efficiency thermal fluorine defrosting and de-icing system using aluminum busbars.

[0021] In the diagram: 1-Compressor, 2-Compressor gas separator, 3-Compressor oil separator, 4-High-pressure switching valve, 5-Condenser, 6-Liquid receiver, 7-Filter, 8-Liquid supply pipe, 9-Compressor exhaust pipe, 10-Compressor suction pipe, 11-Three-way switching valve, 12-Expansion valve, 13-First check valve, 14-Solenoid valve, 15-Stop valve, 16-First ball valve, 17-Second ball valve, 18-Third ball valve, 19-Second check valve, 20-First fan, 21-Second fan, 22-Third fan, 23-Aluminum busbar. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the present utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model.

[0023] The connections mentioned in this utility model are divided into fixed connections and detachable connections. Fixed connections (i.e., non-detachable connections) include, but are not limited to, conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include, but are not limited to, conventional disassembly methods such as threaded connections, snap-fit ​​connections, pin connections, and hinged connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can always be found to achieve the function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for fixed connections, and a hinged connection can be chosen for detachable connections.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Example 1, combined with Figure 1 , Figure 3 This embodiment describes a counter-current high-efficiency hot refrigerant defrosting and de-icing system, comprising a compressor 1, a high-pressure switching valve 4, a condenser 5, a liquid receiver 6, a filter 7, a three-way switching valve 11, and a first fan 20. The compressor oil separator 3 of the compressor 1 is connected sequentially to the condenser 5, the liquid receiver 6, the filter 7, and the first fan 20 via a liquid supply pipe 8. The compressor gas separator 2 of the compressor 1 is connected to the compressor suction pipe 10. The first fan 20 is connected to both the compressor discharge pipe 9 and the compressor suction pipe 10 via the three-way switching valve 11. The liquid supply pipe 8, the compressor discharge pipe 9, and the compressor suction pipe 10 are connected via the high-pressure switching valve 4. A first ball valve 16 is installed on the pipe connecting the compressor oil separator 3 to the condenser 5, a second ball valve 17 is installed on the compressor discharge pipe 9, and a third ball valve 18 is installed on the compressor suction pipe 10.

[0026] This embodiment is a defrosting and de-icing system with a single fan. During refrigeration, the high-pressure switching valve 4 and the three-way switching valve 11 are not energized. The A and B pipes of the high-pressure switching valve 4 are connected, and the A1 and B1 pipes of the three-way switching valve 11 are connected. The first ball valve 16 installed on the pipeline between the compressor oil separator 3 and the condenser 5, the shut-off valve 15 on the pipeline connecting the liquid storage tank 6 and the filter 7, and the solenoid valve 14 on the pipeline connecting the filter 7 and the first fan 20 are opened respectively. The high-temperature and high-pressure gas discharged by the compressor 1 enters the condenser 5 through the compressor oil separator 3 and the A and B pipes of the high-pressure switching valve 4 for condensation. The condensed liquid at the high-pressure ambient temperature enters the liquid storage tank 6. The liquid at the high-pressure ambient temperature enters the expansion valve 20 through the filter 7. After being throttled by the expansion valve 20, it enters the first fan 20 for refrigeration. After refrigeration and evaporation in the first fan 20, it enters the compressor suction pipe 10 through the A1 and B1 pipes of the three-way switching valve 11. It enters the compressor gas separator 2 through the compressor suction pipe 10 and finally flows into the compressor 1 to form a refrigeration cycle.

[0027] When it is necessary to remove frost and ice from the first fan 20, the high-pressure switching valve 4 and the three-way switching valve 11 are energized. Pipes A and B of the high-pressure switching valve 4 are disconnected, while pipes A and C are connected, and pipe B and D are connected. Pipe C1 of the three-way switching valve 11 is connected to pipe A1. The third ball valve 18 and the second ball valve 17 are opened. The high-temperature, high-pressure gaseous gas discharged from the compressor 1 enters the compressor exhaust pipe 9 through pipes A and C of the high-pressure switching valve 4, then enters pipes C1 and A1 of the three-way switching valve 11 through the compressor exhaust pipe 9, and finally flows into the first fan 20 for defrosting and de-icing. After defrosting and de-icing, the first fan 20 discharges high-pressure, low-temperature liquid. The first check valve 1, connected in parallel with the expansion valve 12, is then opened. 3. The second check valve 19, which is connected in parallel with the filter 7 and the solenoid valve 14 on the liquid supply pipe 8, allows the high-pressure, low-temperature liquid to flow out through the pipeline of the first check valve 13 to the liquid supply pipe 8, and then enter the liquid storage tank 6 through the second check valve 19. In the liquid storage tank 6, a large amount of gas and a small amount of liquid are buffered and formed. The large amount of gas and a small amount of gas enter the condenser 5. The condenser 5 evaporates the liquid into gas and discharges it. The gas is then fed into the compressor gas separator 2 through the B and D pipes of the high-pressure switching valve 4. The compressor gas separator 2 feeds a large amount of gas into the compressor 1, forming a large amount of supplementary gas for the compressor 1. The discharge volume of the compressor 1 increases, which increases the flow rate of circulation in each pipeline during the hot fluorine defrosting and de-icing operation, and accelerates the de-icing efficiency in the first fan 20.

[0028] Furthermore, during defrosting and de-icing of the first fan 20, the pressure at the first fan 20 gradually increases under the action of the high-pressure switching valve 4 and the three-way switching valve 11, rather than becoming high pressure instantaneously. Therefore, there is no risk of pipe bursting during the repeated switching between long-term refrigeration and defrosting.

[0029] Depending on actual needs, the first fan 20 can also be replaced by an aluminum busbar 23, as shown in the attached diagram. Figure 3 As shown, except for aluminum tube 23, all existing types of evaporators are applicable, such as iron tubes, copper tubes, etc.

[0030] Example 2, combined with Figure 2 This embodiment describes a counter-current high-efficiency hot fluorine defrosting and de-icing system that employs a multi-fan refrigeration and defrosting mode. In this embodiment, three sets of fans are used, including a first fan 20, a second fan 21, and a third fan 22. The first fan 20, the second fan 21, and the third fan 22 are connected in parallel. Each fan is connected to the compressor suction pipe 10 and the compressor exhaust pipe 9 through a three-way switching valve 11, and another pipe is connected to the liquid supply pipe 10.

[0031] When all three fans are cooling simultaneously, neither the high-pressure switching valve 4 nor the three-way switching valve 11 is energized. The A and B pipes of the high-pressure switching valve 4 are connected, and the A1 and B1 pipes of the three-way switching valve 11 are connected. The shut-off valve 15, solenoid valve 14, first ball valve 16, and expansion valve 12 are opened. The high-temperature and high-pressure gaseous state discharged by the compressor 1 enters the condenser 5 through the compressor oil separator 3 and the high-pressure switching valve 4. The high-temperature and high-pressure gaseous state enters the condenser 5 and condenses into a liquid at the high-pressure ambient temperature, which enters the liquid storage tank 6 and filter 7 in sequence. It is then sent to the expansion valves 12 of the first fan 20, the second fan 21, and the third fan 22 through the liquid supply pipe 8. The expansion valves 12 throttle the liquid and send it to the first fan 20, the second fan 21, and the third fan 22 for cooling. After the first fan 20, the second fan 21, and the third fan 22 cool and evaporate, the liquid enters the compressor suction pipe 10 through the A1 and B1 pipes of the three-way switching valve 11, enters the compressor gas separator 2 through the compressor suction pipe 10, and flows into the compressor 1 to form a cooling cycle.

[0032] When defrosting and de-icing a single fan, taking the first fan 20 as an example, when defrosting and de-icing the first fan 20, open the second ball valve 17 and the third ball valve 18, open the first check valve 13 on the first fan 20 and the second check valve 19 on the liquid supply pipe 8, energize the high-pressure switching valve 4 and the three-way switching valve 11 of the first fan 20, so that pipe A and pipe C of the high-pressure switching valve 4 are connected, and pipe B and pipe D are connected, and the A1 of the three-way switching valve 11 of the first fan 20 is energized. The pipe is connected to the C1 pipe. The three-way switching valve 11 of the second fan 21 and the third fan 22 is not energized. The first one-way valve 13 on the second fan 21 and the third fan 22 is closed. The high-temperature and high-pressure gas discharged from the compressor 1 enters the compressor exhaust pipe 9 through the A and C pipes of the high-pressure switching valve 4. The high-temperature and high-pressure gas enters the C1 and A1 pipes of the three-way switching valve 11 of the first fan 20 through the compressor exhaust pipe 9 and flows into the first fan 20 for defrosting and de-icing.

[0033] After defrosting and de-icing, the high-temperature, high-pressure gaseous state in the first fan 20 is discharged as a high-pressure, low-temperature liquid. This liquid flows out through the first one-way valve 13 of the first fan 20 and into the liquid supply pipe 8. Most of the high-pressure, low-temperature liquid in the liquid supply pipe 8 flows into the expansion valves 12 of the second and third fans 21 and 22, where it is throttled and sent for cooling. After cooling, the second and third fans 21 and 22 enter the compressor suction pipe 10 through the A1 and B1 pipes of the three-way switching valve 11. The gas enters the compressor gas separator 2, and the remaining small portion of high-pressure low-temperature liquid enters the liquid storage tank 6 through the second one-way valve 19. In the liquid storage tank 6, it is buffered and evaporated to form evaporated gas and evaporated liquid. The evaporated gas and evaporated liquid enter the condenser 5. The liquid evaporates in the condenser 5, and a large amount of gas is replenished into the compressor gas separator 2 through the B and D pipes of the high-pressure switching valve 4. The compressor gas separator 2 replenishes the gas into the compressor 1, replenishing the compressor 1. The discharge volume of the compressor 1 increases, the circulation speed increases, and the defrosting work of the first fan 20 is completed.

[0034] When the second fan 21 defrosts, its three-way switching valve 11 is energized, the energization of the first fan 20's three-way switching valve 11 is disconnected, the first one-way valve 13 on the first fan 20 is closed, and the first one-way valve 13 on the second fan 21 is opened. In this manner, the high-pressure, high-temperature gaseous liquid discharged from the compressor 1 enters the second fan 21 for defrosting and de-icing, while the discharged high-pressure, low-temperature liquid enters the first fan 20 and the third fan 22, where it is throttled by the expansion valves 12 of the first fan 20 and the third fan 22 for cooling. The remaining high-pressure, low-temperature liquid enters the liquid storage tank 6 through the second one-way valve 19, where it is buffered and evaporated to form evaporating gaseous and evaporating liquid states. The evaporated liquid enters the condenser 5, where it evaporates. A large amount of gaseous liquid is supplied to the compressor gas distributor 2 through pipes B and D of the high-pressure switching valve 4. The compressor gas distributor 2 then supplies gas to the compressor 1, increasing the compressor 1's discharge volume and circulation speed, thus completing the defrosting work of the second fan 21. The defrosting mode of the third fan 22 is the same as that of the first fan 20 and the second fan 21. Under the action of the high-pressure switching valve 4 and the three-way switching valve 11 of each fan, while defrosting each single fan, the remaining fans continue to perform refrigeration work. The medium flow rate in the pipeline is fast, the compressor is supplied with sufficient gas, and the defrosting and refrigeration efficiency is high.

[0035] Example 3, combined with Figure 1 This embodiment describes a single-fan counter-current high-efficiency hot compress defrosting and de-icing method, which includes the following modes:

[0036] Cooling mode: High-pressure switching valve 4 and three-way switching valve 11 are not energized. Pipes A and B of high-pressure switching valve 4 are connected, while pipes C and D are disconnected. Pipes A1 and B1 of three-way switching valve 11 are connected. High-temperature and high-pressure gaseous state discharged from compressor 1 enters condenser 5 through compressor oil separator 3 and high-pressure switching valve 4. The high-temperature and high-pressure gaseous state enters condenser 5 and condenses into liquid at high pressure ambient temperature, which enters liquid storage tank 6. The shut-off valve 15 is opened and enters filter 7. The liquid is sent to expansion valve 12 of first fan 20 through supply pipe 8. The liquid is throttled by expansion valve 12 and sent to first fan 20 for cooling.

[0037] After the first fan 20 refrigerates and evaporates, it enters the compressor suction pipe 10 through the A1 and B1 pipes of the three-way switching valve 11, enters the compressor gas separator 2 through the compressor suction pipe 10, and flows into the compressor 1 to form a refrigeration cycle.

[0038] Defrosting and de-icing mode: High-pressure switching valve 4 and three-way switching valve 11 are energized. Pipes A and C of high-pressure switching valve 4 are connected, and pipes B and D are connected. Pipes A1 and C1 of three-way switching valve 11 are connected. The high-temperature and high-pressure gas discharged from compressor 1 enters compressor exhaust pipe 9 through pipes A and C of high-pressure switching valve 4. The high-temperature and high-pressure gas enters pipes C1 and A1 of three-way switching valve 11 through compressor exhaust pipe 9 and flows into the first fan 20 for defrosting and de-icing.

[0039] After defrosting and de-icing, the high-temperature and high-pressure gaseous state in the first fan 20 is discharged as a high-pressure and low-temperature liquid. The first one-way valve 13, which is connected in parallel with the expansion valve 12, is opened, and the liquid flows out through the pipeline of the first one-way valve 13 to the liquid supply pipe 8. The high-pressure and low-temperature liquid in the liquid supply pipe 8 enters the liquid storage tank 6 through the second one-way valve 19. In the liquid storage tank 6, the liquid is buffered and evaporated to form evaporated gaseous state and evaporated liquid state. The evaporated gaseous state and evaporated liquid state enter the condenser 5. The evaporated liquid state evaporates in the condenser 5. A large amount of gaseous state is replenished into the compressor gas separator 2 through the B and D pipes of the high-pressure switching valve 4. The compressor gas separator 2 replenishes the gaseous state into the compressor 1, which replenishes the compressor 1, increases the discharge volume of the compressor 1, and increases the circulation flow rate.

[0040] Example 4, combined with Figure 2 This embodiment describes a multi-fan counter-current high-efficiency hot compress defrosting and de-icing method, which includes the following modes:

[0041] Cooling mode: High-pressure switching valve 4 and three-way switching valve 11 are not energized. Pipe A and pipe B of high-pressure switching valve 4 are connected, while pipe C and pipe D are disconnected. Pipe A1 and pipe B1 of three-way switching valve 11 are connected. High-temperature and high-pressure gaseous state discharged from compressor 1 enters condenser 5 through compressor oil separator 3 and high-pressure switching valve 4. The high-temperature and high-pressure gaseous state enters condenser 5 and condenses into liquid at high pressure ambient temperature, which enters liquid storage tank 6. The shut-off valve 15 is opened and enters filter 7. The liquid is sent to the expansion valve 12 of the first fan 20, the second fan 21 and the third fan 22 through the liquid supply pipe 8. The expansion valve 12 throttles the liquid and sends it to the first fan 20, the second fan 21 and the third fan 22 for cooling.

[0042] After the first fan 20, the second fan 21 and the third fan 22 refrigerate and evaporate, they enter the compressor suction pipe 10 through the A1 pipe and B1 pipe of the three-way switching valve 11, enter the compressor gas separator 2 through the compressor suction pipe 10, and flow into the compressor 1 to form a refrigeration cycle.

[0043] Defrosting and defrosting modes:

[0044] First fan 20 defrosting: High pressure switching valve 4 and three-way switching valve 11 of first fan 20 are energized, while three-way switching valves 11 of second fan 21 and third fan 22 are not energized. Pipes A and C of high pressure switching valve 4 are connected, and pipes B and D are connected. Pipes A1 and C1 of three-way switching valve 11 of first fan 20 are connected. High temperature and high pressure gas discharged from compressor 1 enters compressor exhaust pipe 9 through pipes A and C of high pressure switching valve 4. High temperature and high pressure gas enters pipes C1 and A1 of three-way switching valve 11 of first fan 20 through compressor exhaust pipe 9 and flows into first fan 20 for defrosting and de-icing.

[0045] After defrosting and de-icing the high-temperature, high-pressure gaseous state inside the first fan 20, the high-pressure, low-temperature liquid is discharged. The first one-way valve 13, connected in parallel with the expansion valve 12, is opened, while the first one-way valves 13 of the second and third fans 22 are closed. The liquid flows out through the pipeline of the first one-way valve 13 to the liquid supply pipe 8. The high-pressure, low-temperature liquid in the liquid supply pipe 8 flows into the expansion valves 12 of the second and third fans 21 and 22, where it is throttled and sent to the second and third fans 21 and 22 for cooling. After cooling, the second and third fans 21 and 22 enter the compressor through the A1 and B1 pipes of the three-way switching valve 11. The compressor intake pipe 10 leads to the compressor gas separator 2. The remaining high-pressure low-temperature liquid enters the liquid storage tank 6 through the second one-way valve 19. In the liquid storage tank 6, the liquid is buffered and evaporated to form evaporated gas and evaporated liquid. The evaporated gas and evaporated liquid enter the condenser 5. The evaporated liquid evaporates in the condenser 5. A large amount of gas is replenished into the compressor gas separator 2 through the B and D pipes of the high-pressure switching valve 4. The compressor gas separator 2 replenishes the gas into the compressor 1, which increases the discharge volume of the compressor 1 and increases the circulation speed, thus completing the defrosting work of the first fan 20.

[0046] Second fan 21 defrosting: After the first fan 20 completes the defrosting and de-icing work, the first one-way valve 13 on the first fan 20 is closed, the three-way switching valve 11 of the first fan 20 is not energized, the three-way switching valve 11 of the second fan 21 is energized, the first one-way valve 13 of the second fan 21 is opened, the high-temperature and high-pressure gas discharged by the compressor 1 enters the compressor exhaust pipe 9 through the A and C pipes of the high-pressure switching valve 4, and the high-temperature and high-pressure gas enters the C1 and A1 pipes of the three-way switching valve 11 of the second fan 21 through the compressor exhaust pipe 9, and flows into the second fan 21 to carry out the defrosting and de-icing work;

[0047] After defrosting and de-icing, the high-temperature, high-pressure gaseous state in the second fan 21 discharges a high-pressure, low-temperature liquid state, which flows out through the pipeline of the first one-way valve 13 to the liquid supply pipe 8. The high-pressure, low-temperature liquid state in the liquid supply pipe 8 flows into the expansion valve 12 of the first fan 20 and the third fan 22, where it is throttled and sent to the first fan 20 and the third fan 22 for cooling. After cooling by the first fan 20 and the third fan 22, it enters the compressor suction pipe 10 through the A1 and B1 pipes of the three-way switching valve 11, and then enters the compressor through the compressor suction pipe 10. The gas separator 2, and the remaining high-pressure low-temperature liquid enters the storage tank 6 through the second one-way valve 19. In the storage tank 6, the liquid is buffered and evaporated to form evaporated gas and evaporated liquid. The evaporated gas and evaporated liquid enter the condenser 5. The evaporated liquid evaporates in the condenser 5. A large amount of gas is fed into the compressor gas separator 2 through the B and D pipes of the high-pressure switching valve 4. The compressor gas separator 2 feeds the gas into the compressor 1 to replenish the compressor 1. The discharge volume of the compressor 1 increases, the circulation speed increases, and the defrosting work of the second fan 21 is completed.

[0048] The third fan 22 defrosts and defrosts: After the second fan 21 completes the defrosting and defrosting work, the first one-way valve 13 on the second fan 21 is closed, the three-way switching valve 11 of the second fan 21 is not energized, the three-way switching valve 11 of the third fan 22 is energized, the first one-way valve 13 of the third fan 22 is opened, the high-temperature and high-pressure gas discharged by the compressor enters the compressor exhaust pipe 9 through the A and C pipes of the high-pressure switching valve 4, and the high-temperature and high-pressure gas enters the C1 and A1 pipes of the three-way switching valve 11 of the third fan 22 through the compressor exhaust pipe 9, and flows into the third fan 22 to carry out the defrosting and defrosting work;

[0049] After defrosting and de-icing the high-temperature, high-pressure gaseous state inside the third fan 22, the high-pressure, low-temperature liquid is discharged and flows out through the pipeline of the first one-way valve 13 to the liquid supply pipe 8. The high-pressure, low-temperature liquid in the liquid supply pipe 8 flows into the expansion valve 12 of the first fan 20 and the second fan 21, where it is throttled and sent to the first fan 20 and the second fan 21 for cooling. After cooling by the first fan 20 and the second fan 21, the liquid enters the compressor suction pipe 10 through the A1 and B1 pipes of the three-way switching valve 11, and then enters the compressor through the compressor suction pipe 10. The gas separator 2, and the remaining high-pressure low-temperature liquid enters the liquid storage tank 6 through the second one-way valve 19. In the liquid storage tank 6, the liquid is buffered and evaporated to form evaporated gas and evaporated liquid. The evaporated gas and evaporated liquid enter the condenser 5. The evaporated liquid evaporates in the condenser 5. A large amount of gas is replenished into the compressor gas separator 2 through the B and D pipes of the high-pressure switching valve 4. The compressor gas separator 2 replenishes the gas into the compressor 1, which increases the discharge volume of the compressor 1 and increases the circulation speed, thus completing the defrosting work of the third fan 22.

[0050] This embodiment is merely an exemplary description of the present utility model and does not limit its scope of protection. Those skilled in the art can make partial changes to it, as long as they do not exceed the spirit and essence of the present utility model, they are all within the scope of protection of the present utility model.

Claims

1. A counter flow high efficient hot gas defrosting and de-icing system, characterized in that: The compressor (1), the high-pressure switching valve (4), the condenser (5), the liquid tank (6), the filter (7), the three-way switching valve (11) and the first fan (20) are connected in sequence by the liquid supply pipe (8) of the compressor oil (3) of the compressor (1), the compressor gas (2) of the compressor (1) is connected with the compressor suction pipe (10), the first fan (20) is connected with the compressor exhaust pipe (9) and the compressor suction pipe (10) through the three-way switching valve (11), and the liquid supply pipe (8), the compressor exhaust pipe (9) and the compressor suction pipe (10) are connected through the high-pressure switching valve (4).

2. The counterflow high-efficiency thermofluoro defrosting and deicing system according to claim 1, characterized in that: The filter (7) is provided with a stop valve (15) on the pipeline connected with the liquid tank (6), and an electromagnetic valve (14) is arranged on the pipeline connected between the filter (7) and the first fan (20).

3. The counterflow high-efficiency thermofluoro defrosting and deicing system according to claim 2, characterized in that: The liquid supply pipe (8) is provided with a parallel pipeline, and a second one-way valve (19) is arranged on the parallel pipeline, and the second one-way valve (19) is connected with the filter (7) and the electromagnetic valve (14) in parallel.

4. The counterflow high-efficiency thermofluoro defrosting and deicing system according to claim 3, characterized in that: The first fan (20) is provided with an expansion valve (12) and a first one-way valve (13) on the pipeline connected with the liquid supply pipe (8), and the expansion valve (12) is connected with the first one-way valve (13) in parallel.

5. The counterflow high-efficiency thermofluoro defrosting and deicing system according to claim 4, characterized in that: The first ball valve (16) is arranged on the pipeline connected between the compressor oil (3) and the condenser (5), the second ball valve (17) is arranged on the compressor exhaust pipe (9), and the third ball valve (18) is arranged on the compressor suction pipe (10).

6. The counterflow high-efficiency hot gas defrosting and deicing system of claim 1 or 5, wherein: It also includes a second fan (21) and a third fan (22), and the first fan (20), the second fan (21) and the third fan (22) are connected in parallel.

7. The counterflow high-efficiency thermofluoro defrosting and deicing system according to claim 1, characterized in that: The first fan (20) is replaced by an aluminum row (23) or an iron pipe or a copper pipe.

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