Water pan anti-freezing device, anti-freezing method and heat pump system
By circulating the refrigerant in the heat pipe evaporator and condenser to heat the water tray, the problem of water tray freezing is solved, the heating efficiency and safety of the heat pump unit are improved, and the system energy consumption is reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG PHNIX ECO ENERGY SOLUTION
- Filing Date
- 2023-05-19
- Publication Date
- 2026-05-08
AI Technical Summary
When existing heat pump units are used for heating in low-temperature environments, the water tray is prone to freezing, resulting in incomplete defrosting, which affects heating capacity and energy efficiency. In addition, the electric heater solution increases energy consumption and cost, and there is a risk of dry burning.
The heat exchange is achieved by using a heat pipe evaporator to absorb and control the heat of the main board with a cold medium, and heating the water tray through a heat pipe condenser. Heat exchange is achieved by circulating the cold medium, thus avoiding the use of an electric heater.
It improves the heating efficiency of the heat pump unit, reduces system costs, avoids the risk of dry burning and leakage of electric heaters, and achieves effective antifreeze of the drip tray.
Smart Images
Figure CN116625053B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heat pump technology, and in particular to a water tray antifreeze device, antifreeze method and heat pump system. Background Technology
[0002] Currently, heat pump units typically absorb heat through an air heat exchanger (evaporator) when heating in low-temperature environments, often resulting in frost formation on the exchanger surface. To ensure heating efficiency, heat pump units generally switch to defrost mode, and the defrost water generated during defrosting is collected and discharged through a drip tray located at the bottom of the air heat exchanger. However, during actual defrosting, the defrost water reaching the drip tray is close to its freezing point, making it prone to freezing and causing ice blockage. This leads to incomplete defrosting, severely impacting the heating capacity and efficiency of the heat pump unit. To solve the problem of ice formation in the drip tray, an electric heater is usually installed. This heater converts electrical energy into heat energy to heat the defrost water and ice crystals above their freezing point, preventing the defrost water from freezing.
[0003] However, existing drip tray antifreeze solutions require the heat pump unit to consume additional electrical energy to provide heat, resulting in reduced heating efficiency and increased costs. Furthermore, for dual heat pump units with two drip trays, one unit is typically in heating mode while the other is in defrosting mode. The different condensate volumes in the air heat exchanger under different operating modes can easily cause the simultaneously running electric heater to dry-burn or overheat on one of the drip trays. Moreover, the electric heater's long-term exposure to air can lead to aging, and the conductors inside the heater may come into direct contact with defrost water, posing a risk of electric shock. Summary of the Invention
[0004] The purpose of this invention is to provide a water tray antifreeze device, antifreeze method, and heat pump system, which can solve the problem of reduced heating efficiency of heat pump units caused by heating the water tray with an electric heater in the prior art.
[0005] To achieve the above objectives, this application adopts the following technical solution:
[0006] In a first aspect, a water tray antifreeze device is provided, comprising:
[0007] The first heat exchange component includes a first heat pipe condenser, a first refrigerant input pipe, a first heat pipe evaporator, and a first refrigerant output pipe. The first heat pipe condenser and the first heat pipe evaporator are connected through the first refrigerant input pipe and the first refrigerant output pipe. The first heat pipe condenser is used for heat exchange connection to the first water receiving pan of the first unit, and the first heat pipe evaporator is used for heat exchange connection to the first control main board of the first unit.
[0008] The second heat exchange assembly includes a second heat pipe condenser, a second refrigerant inlet pipe, a second heat pipe evaporator, and a second refrigerant outlet pipe. The second heat pipe condenser and the second heat pipe evaporator are connected through the second refrigerant inlet pipe and the second refrigerant outlet pipe. The second heat pipe condenser is used for heat exchange connection to the second water receiving pan of the second unit, and the second heat pipe evaporator is used for heat exchange connection to the second control main board of the second unit.
[0009] A first distributor is connected to the first refrigerant inlet pipe and the second refrigerant inlet pipe, and is used to distribute the flow of refrigerant to the first heat pipe condenser and the second heat pipe condenser;
[0010] The second distributor is connected to the first refrigerant output line and the second refrigerant output line, and is used to distribute the flow of refrigerant to the first heat pipe evaporator and the second heat pipe evaporator.
[0011] As a preferred embodiment of the water tray antifreeze device, it also includes:
[0012] The controller is communicatively connected to the first distributor and the second distributor;
[0013] The first acquisition module is communicatively connected to the controller and the first unit, and the first acquisition module is used to acquire the operating information of the first unit.
[0014] The second acquisition module is communicatively connected to the controller and the second unit, and is used to acquire the operating information of the second unit.
[0015] As a preferred embodiment of the drip tray antifreeze device, the first distributor and the second distributor are flow valves, each having a connected distribution chamber and two output ends; the first refrigerant input pipeline has a first refrigerant input sub-pipe connected to the first heat pipe condenser, the second refrigerant input pipeline has a second refrigerant input sub-pipe connected to the second heat pipe condenser, the first refrigerant output pipeline has a first refrigerant output sub-pipe connected to the first heat pipe evaporator, and the second refrigerant output pipeline has a second refrigerant output sub-pipe connected to the second heat pipe evaporator;
[0016] The first distributor's distribution chamber is connected to both the first refrigerant input line and the second refrigerant input line, and the two output ends of the first distributor are respectively connected to the first refrigerant input sub-line and the second refrigerant input sub-line;
[0017] The distribution chamber of the second distributor is connected to both the first refrigerant output pipeline and the second refrigerant output pipeline, and the two output ends of the second distributor are respectively connected to the first refrigerant output sub-pipeline and the second refrigerant output sub-pipeline.
[0018] As a preferred embodiment of the water tray antifreeze device, at least one of the following four components is provided: between the first heat pipe condenser and the first water tray, between the second heat pipe condenser and the second water tray, between the first heat pipe evaporator and the first control board, and between the second heat pipe evaporator and the second control board.
[0019] As a preferred embodiment of the water tray antifreeze device, it also includes:
[0020] The base has a first mounting surface and a second mounting surface opposite to each other. The first mounting surface is used to fix a first control main board or a second control main board, and the second mounting surface is used to connect the first heat pipe evaporator or the second heat pipe evaporator.
[0021] As a preferred embodiment of the drip tray antifreeze device, the first heat pipe condenser, the second heat pipe condenser, the first heat pipe evaporator, and the second heat pipe evaporator are microchannel heat exchangers. The microchannel heat exchanger has a refrigerant inlet, a heat pipe channel, and a refrigerant outlet connected together. The refrigerant inlet is connected to the first refrigerant input pipeline or the second refrigerant input pipeline, and the refrigerant outlet is connected to the first refrigerant output pipeline or the second refrigerant output pipeline.
[0022] Secondly, a heat pump system having the aforementioned antifreeze device for the drip tray is provided, comprising:
[0023] The first unit includes a first water receiving pan and a first control main board. The first heat pipe condenser of the water receiving pan antifreeze device is connected to the first water receiving pan, and the first heat pipe evaporator of the water receiving pan antifreeze device is connected to the first control main board.
[0024] The second unit includes a second water receiving pan and a second control main board. The second heat pipe condenser of the water receiving pan antifreeze device is connected to the second water receiving pan, and the second heat pipe evaporator of the water receiving pan antifreeze device is connected to the second control main board.
[0025] Thirdly, a method for preventing a water tray from freezing is provided, applied to the water tray antifreeze device, the method comprising:
[0026] Obtain the operating information of the first unit and the second unit, and determine whether the first unit and the second unit are in the defrosting state based on the operating information;
[0027] When the first unit is in defrost mode and the second unit is in non-defrost mode, the flow rate of refrigerant in the first refrigerant input line to the first heat pipe condenser is increased and the flow rate of refrigerant in the second refrigerant input line to the second heat pipe condenser is decreased through the first distributor; the flow rate of refrigerant in the first refrigerant output line to the first heat pipe evaporator is increased and the flow rate of refrigerant in the second refrigerant output line to the second heat pipe evaporator is decreased through the second distributor.
[0028] When the first unit is in a non-defrosting state and the second unit is in a defrosting state, the first distributor reduces the flow rate of refrigerant from the first refrigerant inlet pipe to the first heat pipe condenser and increases the flow rate of refrigerant from the second refrigerant inlet pipe to the second heat pipe condenser. The second distributor reduces the flow rate of refrigerant from the first refrigerant outlet pipe to the first heat pipe evaporator and increases the flow rate of refrigerant from the second refrigerant outlet pipe to the second heat pipe evaporator.
[0029] As a preferred method for preventing water trays from freezing, it also includes:
[0030] When both the first and second units are in a non-defrosting state, the flow rate of the refrigerant in the first and second refrigerant inlet pipes is evenly distributed by the first distributor, and the flow rate of the refrigerant in the first and second refrigerant outlet pipes is evenly distributed by the second distributor.
[0031] Fourthly, a heat pump system applying the aforementioned drip tray antifreeze method is also provided, comprising:
[0032] The acquisition module is used to acquire the operating information of the first and second generating units;
[0033] The judgment module is used to determine whether the first unit and the second unit are in defrosting state based on the operating information;
[0034] The execution module is used to, when the first unit is in defrost mode and the second unit is in non-defrost mode, increase the flow rate of refrigerant in the first refrigerant input line to the first heat pipe condenser and decrease the flow rate of refrigerant in the second refrigerant input line to the second heat pipe condenser through the first distributor, and increase the flow rate of refrigerant in the first refrigerant output line to the first heat pipe evaporator and decrease the flow rate of refrigerant in the second refrigerant output line to the second heat pipe evaporator through the second distributor;
[0035] The execution module is further configured to, when the first unit is in a non-defrosting state and the second unit is in a defrosting state, reduce the flow rate of refrigerant in the first refrigerant input pipe to the first heat pipe condenser and increase the flow rate of refrigerant in the second refrigerant input pipe to the second heat pipe condenser through the first distributor, and reduce the flow rate of refrigerant in the first refrigerant output pipe to the first heat pipe evaporator and increase the flow rate of refrigerant in the second refrigerant output pipe to the second heat pipe evaporator through the second distributor.
[0036] The beneficial effects of this application are as follows:
[0037] The refrigerant in the first heat pipe evaporator of the first heat exchange component absorbs heat from the first control board of the first unit. After being heated, the refrigerant expands in volume and may even undergo a phase change and vaporization, flowing from the first heat pipe evaporator along the first refrigerant inlet pipe to the first heat pipe condenser. This transfers the heat stored in the refrigerant to the first drip tray to heat the defrost water in the drip tray. The refrigerant, after heat exchange, returns to the first heat pipe evaporator along the first refrigerant outlet pipe to continue absorbing heat from the first control board, thus realizing the heat exchange cycle of the first heat exchange component. Since the first control board needs to maintain operation and continuously dissipate heat regardless of whether the first unit is in defrost or non-defrost mode (e.g., heating mode), this application uses the first heat exchange component to transfer the continuously generated heat from the first control board to the first drip tray. This not only lowers the temperature of the first control board to maintain its normal operating environment but also continuously heats the first drip tray to prevent the defrost water in the drip tray from freezing, achieving energy-saving and environmentally friendly effects. Compared to existing technologies that use electric heaters to heat the water tray, the first heat exchange component of this application can reduce the consumption of additional electrical energy to provide heat, thereby improving the heating efficiency of the first unit and reducing system costs.
[0038] Similarly, for a dual heat pump system with a first unit and a second unit, the heat from the second control board of the second unit can be absorbed by the cold medium in the second heat pipe evaporator of the second heat exchange component, and the cold medium can flow along the second refrigerant input pipe to the second condenser to heat the second water receiving pan of the second unit. This also achieves the heat exchange cycle of transferring the heat from the second control board to the second water receiving pan.
[0039] This application also includes a first distributor on the first refrigerant inlet pipe and the second refrigerant inlet pipe. The first distributor can receive the refrigerant in the first and second refrigerant inlet pipes and distribute the flow rate to the first and second heat pipe condensers. In other words, this application can collect heat from the first and second control boards and change the flow rate of the refrigerant to the first and second heat pipe condensers according to usage requirements, thereby changing the amount of heat transferred to the first and second drip trays respectively. Similarly, a second distributor can be installed on the first and second refrigerant output lines. This second distributor can simultaneously receive the refrigerant that has completed heat exchange from the first and second heat pipe condensers, and then distribute the flow rate of the refrigerant to the first and second refrigerant output lines according to usage requirements. This can further distribute the flow rate of the refrigerant entering the first and second control boards, thereby increasing the flow rate of the refrigerant in the first and second heat exchange components and maintaining the pressure balance of the refrigerant in the first and second heat exchange components.
[0040] When one of the first and second units is in defrost mode while the other is not, this application can adjust the heating effect on the first and second drip trays respectively by distributing the flow of the refrigerant through the first and second distributors. Therefore, the drip tray antifreeze device of this application can transfer more heat from the first and second control boards to the first or second drip tray, which is more prone to frosting and freezing, and can also prevent overheating of the first or second drip tray, which has a low condensate volume, leading to dry burning or overheating. Furthermore, the defrost water in the first or second drip tray, after being heated, can dissipate heat into the surrounding air, allowing the air heat exchanger in the first or second unit to absorb heat from the air and achieve waste heat utilization, further improving the heating efficiency of the first or second unit. Attached Figure Description
[0041] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.
[0042] Figure 1 This is a schematic diagram of the structure of a water tray antifreeze device provided in an embodiment of this application.
[0043] Figure 2 This is a schematic diagram of a partial installation structure of a heat pump system provided in an embodiment of this application.
[0044] Figure 3 A schematic diagram of a partial installation structure of a heat pump system provided in another embodiment of this application.
[0045] Figure 4A partial structural side view of a heat pump system provided in an embodiment of this application.
[0046] Figure 5 This is a schematic diagram of the structure of a microchannel heat exchanger provided in an embodiment of this application.
[0047] Figure 6 This is a schematic diagram of the antifreeze device for a water tray provided in another embodiment of this application.
[0048] Figure 7 This is a cross-sectional view of the flow valve provided in one embodiment of this application.
[0049] Figure 8 This is a schematic diagram of the structure of a heat pump system provided in another embodiment of this application.
[0050] Figure 9 A partial structural schematic diagram of a heat pump system provided in another embodiment of this application.
[0051] In the picture:
[0052] 1. First heat exchange assembly; 11. First heat pipe condenser; 12. First refrigerant inlet pipe; 121. First refrigerant inlet sub-pipe; 13. First heat pipe evaporator; 14. First refrigerant outlet pipe; 141. First refrigerant outlet sub-pipe;
[0053] 2. Second heat exchange assembly; 21. Second heat pipe condenser; 22. Second refrigerant inlet pipe; 221. Second refrigerant inlet sub-pipe; 23. Second heat pipe evaporator; 24. Second refrigerant outlet pipe; 241. Second refrigerant outlet sub-pipe;
[0054] 31. First distributor; 32. Second distributor; 300. Flow valve; 301. Distribution chamber; 302. Output end;
[0055] 4. Controller; 41. First acquisition module; 42. Second acquisition module;
[0056] 5. Thermal conductive layer; 6. Base;
[0057] 7. Microchannel heat exchanger; 71. Refrigerant inlet; 72. Heat pipe channel; 73. Refrigerant outlet;
[0058] 8. First generating unit; 81. First water receiving tray; 82. First control main board; 9. Second generating unit; 91. Second water receiving tray; 92. Second control main board;
[0059] 101. Acquisition module; 102. Judgment module; 103. Execution module. Detailed Implementation
[0060] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0061] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" 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 invention based on the specific circumstances.
[0062] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0063] In existing technologies, when frost forms on the air heat exchanger of a heat pump unit, the unit typically switches to defrost mode to ensure heating efficiency. The defrost water generated during defrosting is collected and discharged through a drip tray located at the bottom of the air heat exchanger. However, during actual defrosting, the defrost water reaching the drip tray is close to its freezing point, making it prone to freezing and causing ice blockage. This results in incomplete defrosting, severely impacting the heat pump unit's heating capacity and efficiency. To address the drip tray freezing problem, an electric heater is typically installed on the tray, using electrical energy to convert into heat energy and heat the defrost water and ice crystals above their freezing point, preventing freezing. However, existing drip tray antifreeze solutions require the heat pump unit to consume additional electrical energy to provide heat, leading to reduced heating efficiency and increased costs. Meanwhile, for dual heat pump units with two water collection pans, one heat pump unit is usually in heating mode while the other is in defrosting mode. The amount of condensate in the air heat exchanger is different in different operating modes, which makes it easy for the electric heater that starts at the same time to dry-burn or overheat on one of the water collection pans.
[0064] This application uses the refrigerant in the heat pipe evaporator to absorb heat from the control board of the heat pump unit, and then allows the refrigerant to flow along the refrigerant input pipe to the heat pipe condenser. The heat exchange between the heat pipe condenser and the drip tray heats the defrost water in the drip tray, thereby cooling the control board and preventing the drip tray from freezing.
[0065] Specifically, such as Figure 1 and Figure 6 As shown, this embodiment provides a water tray antifreeze device, including:
[0066] The first heat exchange assembly 1 includes a first heat pipe condenser 11, a first refrigerant input pipe 12, a first heat pipe evaporator 13, and a first refrigerant output pipe 14. The first heat pipe condenser 11 and the first heat pipe evaporator 13 are connected through the first refrigerant input pipe 12 and the first refrigerant output pipe 14. The first heat pipe condenser 11 is used for heat exchange connection to the first water receiving pan 81 of the first unit 8, and the first heat pipe evaporator 13 is used for heat exchange connection to the first control main board 82 of the first unit 8.
[0067] The second heat exchange assembly 2 includes a second heat pipe condenser 21, a second refrigerant inlet pipe 22, a second heat pipe evaporator 23, and a second refrigerant outlet pipe 24. The second heat pipe condenser 21 and the second heat pipe evaporator 23 are connected through the second refrigerant inlet pipe 22 and the second refrigerant outlet pipe 24. The second heat pipe condenser 21 is used for heat exchange connection to the second water receiving pan 91 of the second unit 9, and the second heat pipe evaporator 23 is used for heat exchange connection to the second control main board 92 of the second unit 9.
[0068] The first distributor 31 is connected to the first refrigerant inlet pipe 12 and the second refrigerant inlet pipe 22, and is used to distribute the flow of refrigerant to the first heat pipe condenser 11 and the second heat pipe condenser 21.
[0069] The second distributor 32 is connected to the first refrigerant output line 14 and the second refrigerant output line 24, and is used to distribute the flow of refrigerant to the first heat pipe evaporator 13 and the second heat pipe evaporator 23.
[0070] This application uses the cold medium in the first heat pipe evaporator 13 of the first heat exchange component 1 to absorb the heat from the first control board 82 of the first unit 8. After being heated, the cold medium expands in volume or even undergoes a phase change and vaporization, flowing from the first heat pipe evaporator 13 along the first refrigerant inlet pipe 12 to the first heat pipe condenser 11, thereby transferring the heat stored in the cold medium to the first water receiving pan 81 to heat the defrosting water in the first water receiving pan 81. The cold medium after heat exchange returns to the first heat pipe evaporator 13 along the first refrigerant outlet pipe 14 to continue absorbing the heat from the first control board 82, thus realizing the heat exchange cycle of the first heat exchange component 1. Since the first control board 82 needs to continuously dissipate heat regardless of whether the first unit 8 is in defrosting or non-defrosting state (e.g., heating state), this application uses the first heat exchange component 1 to transfer the heat continuously generated by the first control board 82 to the first water receiving pan 81. This not only reduces the temperature of the first control board 82 to maintain its normal operating environment, but also continuously heats the first water receiving pan 81 to prevent the defrost water in the first water receiving pan 81 from freezing, achieving energy-saving and environmentally friendly effects. Compared with the prior art's solution of using an electric heater to heat the water receiving pan, the first heat exchange component 1 of this application can reduce the consumption of additional electrical energy to provide heat, thereby improving the heating efficiency of the first unit 8 and reducing system costs.
[0071] Similarly, for a dual heat pump system equipped with a first unit 8 and a second unit 9, the heat from the second control board 92 of the second unit 9 can be absorbed by the cold medium in the second heat pipe evaporator 23 of the second heat exchange component 2, and the cold medium can flow along the second cold medium input pipe 22 to the second condenser to heat the second water receiving pan 91 of the second unit 9, thus achieving the heat exchange cycle of transferring the heat from the second control board 92 to the second water receiving pan 91.
[0072] This application also provides a first distributor 31 on the first refrigerant inlet pipe 12 and the second refrigerant inlet pipe 22. The first distributor 31 can receive the refrigerant in the first refrigerant inlet pipe 12 and the second refrigerant inlet pipe 22, and distribute the flow rate to the first heat pipe condenser 11 and the second heat pipe condenser 21. In other words, this application can collect heat from the first control board 82 and the second control board 92, and change the flow rate of the refrigerant to the first heat pipe condenser 11 and the second heat pipe condenser 21 according to usage requirements, thereby changing the amount of heat transferred to the first drip tray 81 and the second drip tray 91 respectively. Similarly, a second distributor 32 can be installed on the first refrigerant output pipe 14 and the second refrigerant output pipe 24. The second distributor 32 can simultaneously receive the refrigerant that has completed heat exchange from the first heat pipe condenser 11 and the second heat pipe condenser 21, and then distribute the flow rate of the refrigerant to the first refrigerant output pipe 14 and the second refrigerant output pipe 24 according to the usage requirements. It can further distribute the flow rate of the refrigerant entering the first control board 82 and the second control board 92 respectively, which can not only increase the flow rate of the refrigerant in the first heat exchange component 1 and the second heat exchange component 2, but also maintain the pressure balance of the refrigerant in the first heat exchange component 1 and the second heat exchange component 2.
[0073] When one of the first unit 8 and the second unit 9 is in a defrosting state while the other is not, this application can adjust the heating effect on the first drip tray 81 and the second drip tray 91 respectively by distributing the flow of the refrigerant through the first distributor 31 and the second distributor 32. Therefore, the drip tray antifreeze device of this application can transfer more heat from the first control board 82 and the second control board 92 to the first drip tray 81 or the second drip tray 91, which is more prone to frost and ice formation. It can also avoid overheating of the first drip tray 81 or the second drip tray 91, which has a small amount of condensate, thus preventing dry burning or overheating. Moreover, the defrosting water in the first drip tray 81 or the second drip tray 91 can dissipate heat to the surrounding air after being heated, allowing the air heat exchanger in the first unit 8 or the second unit 9 to absorb heat from the air and realize waste heat utilization, further improving the heating efficiency of the first unit 8 or the second unit 9.
[0074] During the use of the antifreeze device for the drip tray in this application, the operating status of the first unit 8 and the second unit 9 can be obtained in advance to determine whether the first unit 8 and the second unit 9 are in defrost mode. Therefore, the flow distribution of the refrigerant to the first distributor 31 and the second distributor 32 can be adjusted according to the operating status of the first unit 8 and the second unit 9.
[0075] In practical use, the operating status of the first unit 8 and the second unit 9 can be recorded and communicated manually, and the user can adjust the distribution ratio of the first distributor 31 and the second distributor 32 based on the recorded results. To improve the timeliness of thawing the first water receiving tray 81 or the second water receiving tray 91, preferably, refer to... Figure 6 The water tray antifreeze device of this application also includes a controller 4, a first acquisition module 41 and a second acquisition module 42, wherein:
[0076] By connecting the controller 4 to the first distributor 31 and the second distributor 32, the controller 4 can automatically adjust the distribution ratio of the first distributor 31 and the second distributor 32 simultaneously without manual control, thus reducing errors and adjustment delays caused by human and subjective factors.
[0077] For the first acquisition module 41 and the second acquisition module 42, the first acquisition module 41 is communicatively connected to the controller 4 and the first unit 8, while the second acquisition module 42 is communicatively connected to the controller 4 and the second unit 9. The first acquisition module 41 acquires the operating information of the first unit 8 and can also forward this information to the controller 4, allowing the controller 4 to read the operating information of the first unit 8 and determine its operating status. Similarly, the second acquisition module 42 can acquire the operating information of the second unit 9 and forward it to the controller 4, enabling the controller 4 to simultaneously know the operating status of both the first unit 8 and the second unit 9. Based on this, the controller 4 adjusts the flow distribution ratio of the refrigerant to the first distributor 31 and the second distributor 32, causing the refrigerant to flow more towards the heat pipe condenser below the heat pump unit in defrost mode, thereby heating the drip tray with more defrost water.
[0078] Specifically, the first acquisition module 41 and the second acquisition module 42 can be the switching modules of the four-way valves in the first unit 8 and the second unit 9. The working status of the first unit 8 and the second unit 9 can be known by the change in the output level of the switching module when the four-way valve switches operation.
[0079] In this application, the first distributor 31 and the second distributor 32 can be various valves capable of controlling multiple flow openings. More preferably, see reference to... Figure 7 The first distributor 31 and the second distributor 32 are flow valves 300. In this embodiment, the flow valve 300 has a connected distribution chamber 301 and two output ends 302. It can collect and distribute the cold medium through the distribution chamber 301, thereby changing the different flow ratios of the cold medium flowing to the two output ends 302 respectively, and realizing the function of distributing the flow of the cold medium.
[0080] Meanwhile, the first refrigerant inlet pipe 12 has a first refrigerant inlet sub-pipe 121 connected to the first heat pipe condenser 11, the second refrigerant inlet pipe 22 has a second refrigerant inlet sub-pipe 221 connected to the second heat pipe condenser 21, the first refrigerant outlet pipe 14 has a first refrigerant outlet sub-pipe 141 connected to the first heat pipe evaporator 13, and the second refrigerant outlet pipe 24 has a second refrigerant outlet sub-pipe 241 connected to the second heat pipe evaporator 23. Therefore, in this embodiment, the distribution chamber 301 of the first distributor 31 is simultaneously connected to the first refrigerant input pipe 12 and the second refrigerant input pipe 22. The two output terminals 302 of the first distributor 31 are respectively connected to the first refrigerant input sub-pipe 121 and the second refrigerant input sub-pipe 221. This allows the refrigerant from the first heat pipe evaporator 13 and the second heat pipe evaporator 23 to enter the distribution chamber 301 of the first distributor 31 through the first refrigerant input pipe 12 and the second refrigerant input pipe 22, respectively. Under the distribution of the distribution chamber 301 of the first distributor 31, the flow rate of the refrigerant output from the two output terminals 302 of the first distributor 31 is changed, thereby achieving that the flow rate of the first refrigerant input sub-pipe 121 is greater than or equal to the flow rate of the second refrigerant input sub-pipe 221, or the flow rate of the first refrigerant input sub-pipe 121 is less than or equal to the flow rate of the second refrigerant input sub-pipe 221.
[0081] Similarly, by connecting the distribution chamber 301 of the second distributor 32 to both the first refrigerant output pipe 14 and the second refrigerant output pipe 24, and connecting the two output ends 302 of the second distributor 32 to the first refrigerant output sub-pipe 141 and the second refrigerant output sub-pipe 241 respectively, the refrigerant from the first heat pipe condenser 11 and the second heat pipe condenser 21 can be distributed through the second distributor 32. This changes the flow rate of the refrigerant output from the two output ends 302 of the second distributor 32, thereby ensuring that the flow rate of the first refrigerant output sub-pipe 141 is greater than or equal to the flow rate of the second refrigerant output sub-pipe 241, or that the flow rate of the first refrigerant output sub-pipe 141 is less than or equal to the flow rate of the second refrigerant output sub-pipe 241.
[0082] In this embodiment, the distribution chamber 301 of the flow valve 300 may be provided with a valve plate that can be turned toward any output end 302. The distribution ratio of the cold medium can be adjusted by adjusting the opening degree of the valve plate relative to any output end 302.
[0083] Optionally, the drip tray antifreeze device of this application can be installed on different numbers of first units 8 and different numbers of second units 9. When dealing with different numbers of first units 8 and second units 9, corresponding numbers of first refrigerant inlet pipe 12, first refrigerant inlet sub-pipe 121, second refrigerant inlet pipe 22, second refrigerant inlet sub-pipe 221, first refrigerant outlet pipe 14, first refrigerant outlet sub-pipe 141, second refrigerant outlet pipe 24, and second refrigerant outlet sub-pipe 241 can be set.
[0084] Specifically, for the connection between the first distributor 31 and the multiple first units 8 and multiple second units 9, the multiple first refrigerant input pipes 12 connected to each first heat pipe evaporator 13 and the multiple second refrigerant input pipes 22 connected to each second heat pipe evaporator 23 are all connected to the distribution chamber 301 of the first distributor 31. The multiple first refrigerant input sub-pipes 121 connected to each first heat pipe condenser 11 are connected in parallel to one of the output terminals 302 of the first distributor 31, and the multiple second refrigerant input sub-pipes 221 connected to each second heat pipe condenser 21 are also connected in parallel to the other output terminal 302 of the first distributor 31.
[0085] Similarly, the multiple first refrigerant output pipes 14 connected to each first heat pipe condenser 11 and the multiple second refrigerant output pipes 24 connected to each second heat pipe condenser 21 are all connected to the distribution chamber 301 of the second distributor 32. The multiple first refrigerant output sub-pipes 141 connected to each first heat pipe evaporator 13 are connected in parallel to one output terminal 302 of the second distributor 32, and the multiple second refrigerant output sub-pipes 241 connected to each second heat pipe evaporator 23 are also connected in parallel to the other output terminal 302 of the second distributor 32. This embodiment can still achieve the flow distribution of refrigerant to multiple first units 8 and multiple second units 9 through a first distributor 31 and a second distributor 32.
[0086] In a preferred embodiment, reference Figure 4 A heat-conducting layer 5 is provided in at least one of the following four components: between the first heat pipe condenser 11 and the first water receiving pan 81; between the second heat pipe condenser 21 and the second water receiving pan 91; between the first heat pipe evaporator 13 and the first control board 82; and between the second heat pipe evaporator 23 and the second control board 92. The heat-conducting layer 5 has high thermal conductivity, which can improve the heat exchange effect between at least one of the following four components: between the first heat pipe condenser 11 and the first water receiving pan 81; between the second heat pipe condenser 21 and the second water receiving pan 91; between the first heat pipe evaporator 13 and the first control board 82; and between the second heat pipe evaporator 23 and the second control board 92. This further improves the heat transfer efficiency of the first heat exchange component 1 or the second heat exchange component 2 and reduces heat loss.
[0087] In this embodiment, the thermally conductive layer 5 can be made of thermally conductive silicone, graphene, thermally conductive grease, thermally conductive silicone, etc.
[0088] In another preferred embodiment, reference Figure 3 The drip tray antifreeze device also includes a base 6, which has a first mounting surface and a second mounting surface. The first mounting surface is used to fix the first control main board 82 or the second control main board 92, while the second mounting surface is connected to the first heat pipe evaporator 13 or the second heat pipe evaporator 23. This improves the connection strength and thermal conductivity between the first control main board 82 and the first heat pipe evaporator 13, and similarly, it also improves the connection strength and thermal conductivity between the second control main board 92 and the second heat pipe evaporator 23. For ease of installation, the areas of both the first and second mounting surfaces of the base 6 can be larger than those of the first control main board 82, the second control main board 92, the first heat pipe evaporator 13, and the second heat pipe evaporator 23.
[0089] In this embodiment, the first heat pipe evaporator 13 and the second heat pipe evaporator 23 can be in close contact with the cores of high-power power electronic devices such as thyristors, IGBTs, and IGCTs in the first unit 8 and the second unit 9, respectively, so that the heat of the cores can be quickly and directly discharged, thereby outputting the heated cold medium.
[0090] Optionally, refer to Figure 5 The first heat pipe condenser 11, the second heat pipe condenser 21, the first heat pipe evaporator 13, and the second heat pipe evaporator 23 constitute a microchannel heat exchanger 7. The microchannel heat exchanger 7 has a connected refrigerant inlet 71, a heat pipe channel 72, and a refrigerant outlet 73. The refrigerant inlet 71 is connected to the first refrigerant input pipe 12 or the second refrigerant input pipe 22, and the refrigerant outlet 73 is connected to the first refrigerant output pipe 14 or the second refrigerant output pipe 24. The working principle of the microchannel heat exchanger 7 is as follows: the refrigerant enters the manifold through the refrigerant inlet 71, and then enters the heat pipe channel 72 of the microchannel heat exchanger 7. During the flow of the refrigerant in the heat pipe channel 72, it exchanges heat with the outside air, thereby achieving cooling or heating. In this embodiment, the preferred refrigerant is R134a. It is necessary to first evacuate the internal cavities of the first heat exchange component 1 and the second heat exchange component 2 to a vacuum state, and then fill them with refrigerant occupying 50% to 70% of the internal cavity volume.
[0091] like Figure 2 and Figure 8 As shown, this application also provides a heat pump system having the drip tray antifreeze device of any of the above embodiments, comprising:
[0092] The first unit 8 includes a first water receiving pan 81 and a first control main board 82. The first heat pipe condenser 11 of the water receiving pan antifreeze device is connected to the first water receiving pan 81, and the first heat pipe evaporator 13 of the water receiving pan antifreeze device is connected to the first control main board 82.
[0093] The second unit 9 includes a second water receiving pan 91 and a second control main board 92. The second heat pipe condenser 21 of the water receiving pan antifreeze device is connected to the second water receiving pan 91, and the second heat pipe evaporator 23 of the water receiving pan antifreeze device is connected to the second control main board.
[0094] The antifreeze device for the drip tray in this embodiment has the same structure and achieves the same effect as the antifreeze device for the drip tray in the above embodiment, and will not be described again in this embodiment. By setting the antifreeze device for the drip tray, the heating capacity and heating efficiency of the heat pump system can be improved, saving energy and protecting the environment, and also avoiding the risk of electric leakage caused by setting an electric heater.
[0095] In addition, this application also provides a method for preventing water trays from freezing, applied to the water tray antifreeze device of any of the above embodiments, comprising:
[0096] S101. Obtain the operating information of the first unit 8 and the second unit 9, and determine whether the first unit 8 and the second unit 9 are in defrosting state based on the operating information;
[0097] S102. When the first unit 8 is in defrost mode and the second unit 9 is in non-defrost mode, the flow rate of refrigerant in the first refrigerant input pipe 12 to the first heat pipe condenser 11 is increased and the flow rate of refrigerant in the second refrigerant input pipe 22 to the second heat pipe condenser 21 is decreased through the first distributor 31. The flow rate of refrigerant in the first refrigerant output pipe 14 to the first heat pipe evaporator 13 is increased and the flow rate of refrigerant in the second refrigerant output pipe 24 to the second heat pipe evaporator 23 is decreased through the second distributor 32.
[0098] S103. When the first unit 8 is in a non-defrosting state and the second unit 9 is in a defrosting state, the flow rate of refrigerant in the first refrigerant input pipe 12 to the first heat pipe condenser 11 is reduced by the first distributor 31, and the flow rate of refrigerant in the second refrigerant input pipe 22 to the second heat pipe condenser 21 is increased. The flow rate of refrigerant in the first refrigerant output pipe 14 to the first heat pipe evaporator 13 is reduced by the second distributor 32, and the flow rate of refrigerant in the second refrigerant output pipe 24 to the second heat pipe evaporator 23 is increased.
[0099] The water tray antifreeze device in this embodiment can have the same structure and achieve the same effect as the water tray antifreeze device in the above embodiment, and will not be described again in this embodiment.
[0100] The antifreeze method for the drip trays in this application can promptly determine whether the first unit 8 and the second unit 9 are in defrosting mode. Based on the operating status of the first unit 8 and the second unit 9, the heating effect on the first drip tray 81 and the second drip tray 91 is adjusted by distributing the flow of the refrigerant through the first distributor 31 and the second distributor 32. Therefore, the antifreeze method for the drip trays in this application can transfer more heat from the first control board 82 and the second control board 92 to the first drip tray 81 or the second drip tray 91, which is more prone to frost and ice formation. It can also avoid overheating of the first drip tray 81 or the second drip tray 91, which has a small amount of condensate, thus preventing dry burning or overheating. Moreover, the defrost water in the first drip tray 81 or the second drip tray 91, after being heated, can dissipate heat to the surrounding air, allowing the air heat exchanger in the first unit 8 or the second unit 9 to absorb heat from the air and realize waste heat utilization, further improving the heating efficiency of the first unit 8 or the second unit 9.
[0101] Specifically, the water tray antifreeze method of this application also includes the following steps:
[0102] S104. When both the first unit 8 and the second unit 9 are in a non-defrosting state, the first distributor 31 evenly distributes the flow rate of the refrigerant in the first refrigerant inlet pipe 12 and the second refrigerant inlet pipe 22, thus evenly distributing the heat from the first control board 82 and the second control board 92 to the first water tray 81 and the second water tray 91, maintaining the same heating effect on the first water tray 81 and the second water tray 91. Similarly, the second distributor 32 evenly distributes the flow rate of the refrigerant in the first refrigerant outlet pipe 14 and the second refrigerant outlet pipe 24, maintaining the same cooling effect on the first control board 82 and the second control board 92.
[0103] like Figure 9 As shown, this application also provides a heat pump system applying any of the above-mentioned drip tray antifreeze methods, comprising:
[0104] The acquisition module 101 is used to acquire the operating information of the first unit 8 and the second unit 9;
[0105] The judgment module 102 is used to determine whether the first unit 8 and the second unit 9 are in the defrosting state based on the operating information;
[0106] The execution module 103 is used to increase the flow rate of refrigerant in the first refrigerant input pipe 12 to the first heat pipe condenser 11 and decrease the flow rate of refrigerant in the second refrigerant input pipe 22 to the second heat pipe condenser 21 through the first distributor 31 when the first unit 8 is in the defrost state and the second unit 9 is in the non-defrost state; and to increase the flow rate of refrigerant in the first refrigerant output pipe 14 to the first heat pipe evaporator 13 and decrease the flow rate of refrigerant in the second refrigerant output pipe 24 to the second heat pipe evaporator 23 through the second distributor 32.
[0107] The execution module 103 is also used to, when the first unit 8 is in a non-defrosting state and the second unit 9 is in a defrosting state, reduce the flow rate of refrigerant in the first refrigerant input pipe 12 to the first heat pipe condenser 11 and increase the flow rate of refrigerant in the second refrigerant input pipe 22 to the second heat pipe condenser 21 through the first distributor 31, and reduce the flow rate of refrigerant in the first refrigerant output pipe 14 to the first heat pipe evaporator 13 and increase the flow rate of refrigerant in the second refrigerant output pipe 24 to the second heat pipe evaporator 23 through the second distributor 32.
[0108] The water tray antifreeze method in this embodiment has the same steps and achieves the same effect as the water tray antifreeze method in the above embodiment, and will not be described again in this embodiment.
[0109] Preferably, the execution module 103 is further configured to, when both the first unit 8 and the second unit 9 are in a non-defrosting state, evenly distribute the flow rate of the refrigerant in the first refrigerant input pipe 12 and the second refrigerant input pipe 22 through the first distributor 31, so as to evenly distribute the heat from the first control board 82 and the second control board 92 to the first water receiving pan 81 and the second water receiving pan 91, thereby maintaining the same heating effect on the first water receiving pan 81 and the second water receiving pan 91. Similarly, evenly distributing the flow rate of the refrigerant in the first refrigerant output pipe 14 and the second refrigerant output pipe 24 through the second distributor 32 can also maintain the same cooling effect on the first control board 82 and the second control board 92.
[0110] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.
[0111] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0112] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0113] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.
Claims
1. A water tray antifreeze device, characterized in that, include: The first heat exchange assembly (1) includes a first heat pipe condenser (11), a first refrigerant input pipe (12), a first heat pipe evaporator (13) and a first refrigerant output pipe (14). The first heat pipe condenser (11) and the first heat pipe evaporator (13) are connected through the first refrigerant input pipe (12) and the first refrigerant output pipe (14). The first heat pipe condenser (11) is used to heat exchange and connect to the first water receiving pan (81) of the first unit (8). The first heat pipe evaporator (13) is used to heat exchange and connect to the first control main board (82) of the first unit (8). The second heat exchange assembly (2) includes a second heat pipe condenser (21), a second refrigerant inlet pipe (22), a second heat pipe evaporator (23), and a second refrigerant outlet pipe (24). The second heat pipe condenser (21) and the second heat pipe evaporator (23) are connected through the second refrigerant inlet pipe (22) and the second refrigerant outlet pipe (24). The second heat pipe condenser (21) is used for heat exchange connection to the second water receiving pan (91) of the second unit (9), and the second heat pipe evaporator (23) is used for heat exchange connection to the second control main board (92) of the second unit (9). The first distributor (31) is connected to the first refrigerant inlet pipe (12) and the second refrigerant inlet pipe (22) and is used to distribute the flow of refrigerant to the first heat pipe condenser (11) and the second heat pipe condenser (21); The second distributor (32) is connected to the first refrigerant output line (14) and the second refrigerant output line (24) and is used to distribute the flow of refrigerant to the first heat pipe evaporator (13) and the second heat pipe evaporator (23).
2. The antifreeze device for the water receiving tray according to claim 1, characterized in that, Also includes: The controller (4) is communicatively connected to the first distributor (31) and the second distributor (32); The first acquisition module (41) is communicatively connected to the controller (4) and the first unit (8). The first acquisition module (41) is used to acquire the operating information of the first unit (8). The second acquisition module (42) is communicatively connected to the controller (4) and the second unit (9). The second acquisition module (42) is used to acquire the operating information of the second unit (9).
3. The antifreeze device for the water receiving tray according to claim 1, characterized in that, The first distributor (31) and the second distributor (32) are flow valves (300), the flow valves (300) having connected distribution chambers (301) and two output ends (302); the first refrigerant input pipe (12) has a first refrigerant input sub-pipe (121) connected to the first heat pipe condenser (11), the second refrigerant input pipe (22) has a second refrigerant input sub-pipe (221) connected to the second heat pipe condenser (21), the first refrigerant output pipe (14) has a first refrigerant output sub-pipe (141) connected to the first heat pipe evaporator (13), and the second refrigerant output pipe (24) has a second refrigerant output sub-pipe (241) connected to the second heat pipe evaporator (23); The distribution chamber (301) of the first distributor (31) is connected to both the first refrigerant input pipe (12) and the second refrigerant input pipe (22), and the two output ends (302) of the first distributor (31) are connected to the first refrigerant input sub-pipe (121) and the second refrigerant input sub-pipe (221) respectively; The distribution chamber (301) of the second distributor (32) is connected to both the first refrigerant output pipe (14) and the second refrigerant output pipe (24). The two output ends (302) of the second distributor (32) are respectively connected to the first refrigerant output sub-pipe (141) and the second refrigerant output sub-pipe (241).
4. The antifreeze device for the water receiving tray according to claim 1, characterized in that, At least one of the following four components is provided with a heat-conducting layer (5): between the first heat pipe condenser (11) and the first water receiving tray (81), between the second heat pipe condenser (21) and the second water receiving tray (91), between the first heat pipe evaporator (13) and the first control board (82), and between the second heat pipe evaporator (23) and the second control board (92).
5. The antifreeze device for the water receiving tray according to claim 1, characterized in that, Also includes: The base (6) has a first mounting surface and a second mounting surface opposite to each other. The first mounting surface is used to fix the first control main board (82) or the second control main board (92), and the second mounting surface is used to connect the first heat pipe evaporator (13) or the second heat pipe evaporator (23).
6. The antifreeze device for the water receiving tray according to claim 1, characterized in that, The first heat pipe condenser (11), the second heat pipe condenser (21), the first heat pipe evaporator (13) and the second heat pipe evaporator (23) are microchannel heat exchangers (7). The microchannel heat exchanger (7) has a refrigerant inlet (71), a heat pipe channel (72) and a refrigerant outlet (73) connected together. The refrigerant inlet (71) is connected to the first refrigerant input pipe (12) or the second refrigerant input pipe (22), and the refrigerant outlet (73) is connected to the first refrigerant output pipe (14) or the second refrigerant output pipe (24).
7. A heat pump system having a drip tray antifreeze device as described in any one of claims 1 to 6, characterized in that, include: The first unit (8) includes a first water receiving pan (81) and a first control main board (82). The first heat pipe condenser (11) of the water receiving pan antifreeze device is connected to the first water receiving pan (81), and the first heat pipe evaporator (13) of the water receiving pan antifreeze device is connected to the first control main board (82). The second unit (9) includes a second water receiving pan (91) and a second control main board (92). The second heat pipe condenser (21) of the water receiving pan antifreeze device is connected to the second water receiving pan (91), and the second heat pipe evaporator (23) of the water receiving pan antifreeze device is connected to the second control main board.
8. A method for preventing water trays from freezing, applied to the water tray antifreeze device according to any one of claims 1 to 6, characterized in that, The method includes: Obtain the operating information of the first unit (8) and the second unit (9), and determine whether the first unit (8) and the second unit (9) are in the defrosting state based on the operating information; When the first unit (8) is in defrost mode and the second unit (9) is in non-defrost mode, the flow rate of the refrigerant in the first refrigerant input pipe (12) to the first heat pipe condenser (11) is increased by the first distributor (31) and the flow rate of the refrigerant in the second refrigerant input pipe (22) to the second heat pipe condenser (21) is decreased. The flow rate of the refrigerant in the first refrigerant output pipe (14) to the first heat pipe evaporator (13) is increased by the second distributor (32) and the flow rate of the refrigerant in the second refrigerant output pipe (24) to the second heat pipe evaporator (23) is decreased. When the first unit (8) is in a non-defrosting state and the second unit (9) is in a defrosting state, the flow rate of the refrigerant in the first refrigerant input pipe (12) to the first heat pipe condenser (11) is reduced by the first distributor (31), and the flow rate of the refrigerant in the second refrigerant input pipe (22) to the second heat pipe condenser (21) is increased. The flow rate of the refrigerant in the first refrigerant output pipe (14) to the first heat pipe evaporator (13) is reduced by the second distributor (32), and the flow rate of the refrigerant in the second refrigerant output pipe (24) to the second heat pipe evaporator (23) is increased.
9. The method for preventing the water tray from freezing according to claim 8, characterized in that, Also includes: When both the first unit (8) and the second unit (9) are in a non-defrosting state, the flow rate of the refrigerant in the first refrigerant input pipe (12) and the second refrigerant input pipe (22) is evenly distributed by the first distributor (31), and the flow rate of the refrigerant in the first refrigerant output pipe (14) and the second refrigerant output pipe (24) is evenly distributed by the second distributor (32).
10. A heat pump system employing the water tray antifreeze method according to any one of claims 8 to 9, characterized in that, include: The acquisition module (101) is used to acquire the operating information of the first unit (8) and the second unit (9); The judgment module (102) is used to determine whether the first unit (8) and the second unit (9) are in defrosting state based on the operation information; The execution module (103) is used to increase the flow rate of the refrigerant in the first refrigerant input pipe (12) to the first heat pipe condenser (11) and decrease the flow rate of the refrigerant in the second refrigerant input pipe (22) to the second heat pipe condenser (21) through the first distributor (31) and decrease the flow rate of the refrigerant in the second refrigerant input pipe (22) to the second heat pipe condenser (21) through the second distributor (32); and to increase the flow rate of the refrigerant in the first refrigerant output pipe (14) to the first heat pipe evaporator (13) and decrease the flow rate of the refrigerant in the second refrigerant output pipe (24) to the second heat pipe evaporator (23) through the second distributor (32). The execution module (103) is further configured to, when the first unit (8) is in a non-defrosting state and the second unit (9) is in a defrosting state, reduce the flow rate of the refrigerant in the first refrigerant input pipe (12) to the first heat pipe condenser (11) and increase the flow rate of the refrigerant in the second refrigerant input pipe (22) to the second heat pipe condenser (21) through the first distributor (31), and reduce the flow rate of the refrigerant in the first refrigerant output pipe (14) to the first heat pipe evaporator (13) and increase the flow rate of the refrigerant in the second refrigerant output pipe (24) to the second heat pipe evaporator (23) through the second distributor (32).
Citation Information
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