A heat pump unit, a heat pump unit operation control method, device and storage medium

Abstract

This invention discloses a heat pump unit, a heat pump unit operation control method, an apparatus, and a storage medium. When the control module in the heat pump unit determines that the ambient temperature, outlet water temperature, or the execution state of the enthalpy-increasing action meets the preset enthalpy-increasing conditions, it controls the first valve to close and the second valve to open, so as to obtain refrigerant with insufficient temperature and pressure regulation from the upstream circulation pipeline of the economizer. When the preset enthalpy-increasing conditions are not met, it controls the first valve to open and the second valve to close, so as to obtain refrigerant with sufficient temperature and pressure regulation from the downstream circulation pipeline of the economizer. In this invention, by controlling the opening and closing of the first and second valves, refrigerant can be obtained from different locations. By obtaining refrigerant from different locations, the temperature and pressure of the refrigerant flowing into the compressor during enthalpy increase can be adjusted, thereby regulating the compressor's exhaust temperature.

Description

Technical Field

[0001] This application relates to the field of heat pump units, and more particularly to a heat pump unit, a heat pump unit operation control method, a device, and a storage medium. Background Technology

[0002] A dual-heat pump unit refers to a device that uses an air source heat pump system to provide hot water and heating or both heating and cooling functions simultaneously. Dual-heat pump units typically consist of a compressor, a finned heat exchanger, a shell-and-tube heat exchanger, and a water pump.

[0003] Currently, in order to meet the heating needs of different users, dual-heat pump units need to be programmed with enthalpy-boosting activation logic under various operating conditions. However, under low ambient temperature or low water temperature conditions, the activation of enthalpy-boosting will cause the exhaust temperature of the heat pump unit to drop rapidly. This rapid drop in exhaust temperature increases the risk of liquid return from the compressor, thereby affecting the operational safety of the dual-heat pump unit. Summary of the Invention

[0004] This invention provides a heat pump unit, a heat pump unit operation control method, a device, and a storage medium, which solves the technical problem in the prior art that the activation of the enthalpy-increasing action will cause the exhaust temperature of the heat pump unit to drop rapidly under low ambient temperature or low water temperature conditions.

[0005] In a first aspect, embodiments of the present invention provide a heat pump unit, the heat pump unit including an economizer, a compressor, a first tee pipe, a second tee pipe, a third tee pipe, a first valve, and a second valve. The first end of the first tee pipe is connected to an upstream circulation pipeline, the second end of the first tee pipe is connected to the second end of the second valve, the third end of the first tee pipe is connected to the first end of the economizer, the second end of the economizer is connected to the third end of the second tee pipe, the first end of the second tee pipe is connected to a downstream circulation pipeline, the second end of the second tee pipe is connected to the first end of the first valve, the second end of the first valve is connected to the first end of the third tee pipe, the second end of the third tee pipe is connected to the first end of the second valve, the third end of the third tee pipe is connected to the third end of the economizer, the fourth end of the economizer is connected to the first end of the compressor, the first end of the economizer is connected to the second end of the economizer, and the third end of the economizer is connected to the fourth end of the economizer. Refrigerant flows from the upstream circulation pipeline into the first end of the first tee pipe.

[0006] The heat pump unit also includes a control module, an ambient temperature sensor, and an outlet water temperature sensor.

[0007] The ambient temperature sensor is used to detect the ambient temperature where the heat pump unit is located;

[0008] The outlet water temperature sensor is used to detect the outlet water temperature of the heat pump unit;

[0009] The control module is used to acquire the ambient temperature and the outlet water temperature, and to detect the execution status of the heat pump unit's enthalpy-increasing action, and to determine whether the ambient temperature, the outlet water temperature, or the execution status of the enthalpy-increasing action meets the preset enthalpy-increasing conditions; if the preset enthalpy-increasing conditions are met, the first valve is controlled to close and the second valve is controlled to open; if the preset enthalpy-increasing conditions are not met, the first valve is controlled to open and the second valve is controlled to close.

[0010] Specifically, the control module is used to determine whether the preset enthalpy increase condition is met when the ambient temperature is lower than the preset ambient temperature, the outlet water temperature is lower than the preset outlet water temperature, or the enthalpy increase action is started for the first time.

[0011] The preset ambient temperature is -10°C, and the preset outlet water temperature is 40°C.

[0012] The first valve and the second valve are electronic expansion valves.

[0013] In a second aspect, embodiments of the present invention provide a heat pump unit operation control method, the method being applicable to a heat pump unit as described in the first aspect, the method comprising:

[0014] The ambient temperature of the environment where the heat pump unit is located and the outlet water temperature of the heat pump unit are obtained, and the execution status of the enthalpy increase action of the heat pump unit is detected.

[0015] Determine whether the ambient temperature, the outlet water temperature, or the execution status of the enthalpy increase action meets the preset enthalpy increase conditions;

[0016] Under the condition that the preset enthalpy increase condition is met, the first valve of the heat pump unit is shut off and the second valve of the heat pump unit is opened.

[0017] If the preset enthalpy increase condition is not met, the first valve is controlled to open and the second valve is controlled to close.

[0018] The step of determining whether the ambient temperature, the outlet water temperature, or the execution state of the enthalpy increase action meets the preset enthalpy increase conditions includes:

[0019] When the ambient temperature is lower than the preset ambient temperature, the outlet water temperature is lower than the preset outlet water temperature, or the enthalpy increase action is initiated for the first time, it is determined that the preset enthalpy increase condition is met.

[0020] The preset ambient temperature is -10°C, and the preset outlet water temperature is 40°C.

[0021] The first valve and the second valve are electronic expansion valves.

[0022] Thirdly, embodiments of the present invention provide a heat pump unit operation control device, which is applicable to a heat pump unit as described in the first aspect, and the heat pump unit operation control device includes:

[0023] The data acquisition module is used to acquire the ambient temperature of the environment where the heat pump unit is located and the outlet water temperature of the heat pump unit, as well as to detect the execution status of the enthalpy increase action of the heat pump unit.

[0024] The condition judgment module is used to determine whether the ambient temperature, the outlet water temperature, or the execution status of the enthalpy increase action meets the preset enthalpy increase conditions.

[0025] The enthalpy compensation module is used to control the first valve of the heat pump unit to close and the second valve of the heat pump unit to open when the preset enthalpy increase condition is met.

[0026] The enthalpy increase uncompensated module is used to control the opening of the first valve and the closing of the second valve when the preset enthalpy increase condition is not met.

[0027] Fourthly, embodiments of the present invention provide a storage medium for storing computer-executable instructions, which, when executed by a computer processor, are used to perform a heat pump unit operation control method as described in the second aspect.

[0028] This invention provides a heat pump unit, a heat pump unit operation control method, an apparatus, and a storage medium. When the control module in the heat pump unit determines that the ambient temperature, outlet water temperature, or the execution state of the enthalpy-increasing action meets the preset enthalpy-increasing conditions, it controls the first valve to close and the second valve to open, so as to obtain refrigerant with insufficient temperature and pressure regulation from the upstream circulation pipeline of the economizer. Because the refrigerant subsequently enters the compressor with a higher temperature and / or pressure, the compressor can obtain more heat supplementation during the compression process, thereby increasing the exhaust temperature. This helps to maintain the stable operation of the compressor in low-temperature environments and avoids a significant drop in exhaust temperature during the enthalpy-increasing action. When the preset enthalpy-increasing conditions are not met, the first valve is controlled to open and the second valve to close, so as to obtain refrigerant with sufficient temperature and pressure regulation from the downstream circulation pipeline of the economizer. When the refrigerant subsequently flows into the compressor, its temperature and pressure reach a state more suitable for the compressor's operation, which helps to reduce the heat generated by the compressor during the compression process, thereby reducing the compressor's exhaust temperature. In this embodiment of the invention, by controlling the opening and closing of the first and second valves, refrigerant can be obtained from different locations. By obtaining refrigerant from different locations, the temperature and pressure of the refrigerant flowing into the compressor during enthalpy increase can be adjusted, thereby regulating the compressor's exhaust temperature. This solves the technical problem in the prior art where the activation of the enthalpy increase action causes a rapid drop in the exhaust temperature of the heat pump unit under low ambient temperature or low water temperature conditions. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a heat pump unit provided in an embodiment of the present invention.

[0030] Figure 2 This is a flowchart illustrating a heat pump unit operation control method provided in an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of another heat pump unit provided in an embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram of the structure of a heat pump unit operation control device provided in an embodiment of the present invention.

[0033] Figure reference numerals: Economizer 1, Compressor 2, First tee pipe 3, Second tee pipe 4, Third tee pipe 5, First valve 6, Second valve 7, Four-way valve 8, Shell-and-tube heat exchanger 9, Main electronic expansion valve 10, Finned heat exchanger 11, Gas-liquid separator 12. Detailed Implementation

[0034] The following description and accompanying drawings fully illustrate specific embodiments of this application to enable those skilled in the art to practice them. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of embodiments of this application includes the entire scope of the claims and all available equivalents of the claims. In this document, each embodiment may be referred to individually or collectively by the term "invention," which is merely for convenience and is not intended to automatically limit the scope of the application to any single invention or inventive concept if more than one invention is disclosed. Relational terms such as "first" and "second" are used herein only to distinguish one entity or operation from another, without requiring or implying any actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed. The various embodiments in this document are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the structures, products, etc., disclosed in the embodiments, since they correspond to the disclosed parts, the descriptions are relatively simple; relevant details can be found in the method section.

[0035] This invention provides a heat pump unit, such as... Figure 1 As shown, Figure 1This is a schematic diagram of a heat pump unit provided in an embodiment of the present invention. The heat pump unit provided in this embodiment includes an economizer 1, a compressor 2, a first tee pipe 3, a second tee pipe 4, a third tee pipe 5, a first valve 6, and a second valve 7. The first end of the first tee pipe 3 is connected to the upstream circulation pipeline, the second end of the first tee pipe 3 is connected to the second end of the second valve 7, the third end of the first tee pipe 3 is connected to the first end of the economizer 1, the second end of the economizer 1 is connected to the third end of the second tee pipe 4, the first end of the second tee pipe 4 is connected to the downstream circulation pipeline, the second end of the second tee pipe 4 is connected to the first end of the first valve 6, the second end of the first valve 6 is connected to the first end of the third tee pipe 5, the second end of the third tee pipe 5 is connected to the first end of the second valve 7, the third end of the third tee pipe 5 is connected to the third end of the economizer 1, the fourth end of the economizer 1 is connected to the first end of the compressor 2, the first end of the economizer 1 is connected to the second end of the economizer 1, and the third end of the economizer 1 is connected to the fourth end of the economizer 1. It should be noted that the refrigerant flows into the first end of the first tee pipe 3 from the upstream circulation pipe. The upstream and downstream circulation pipes are relative to the economizer 1. The upstream circulation pipe starts at the compressor 2, and the downstream circulation pipe ends at the compressor 2, forming a complete cycle. In addition, the flow paths of the upstream and downstream circulation pipes are not fixed, but are determined by the operating mode of the heat pump unit.

[0036] For example, when the heat pump unit operates in heating cycle mode, the high-temperature, high-pressure steam discharged from compressor 2 enters the upstream circulation pipe, releases heat to the heating system, and then condenses into refrigerant. The refrigerant then flows from the upstream circulation pipe into the first end of the first tee pipe 3, from the third end of the first tee pipe 3 into the first end of the economizer 1, from the second end of the economizer 1 into the third end of the second tee pipe 4, and then from the first end of the second tee pipe 4 into the downstream circulation pipe. In the downstream circulation pipe, it undergoes pressure reduction to become a mixture of low-temperature, low-pressure liquid and gaseous refrigerant, which is then evaporated back into low-temperature, low-pressure gaseous refrigerant and flows back to compressor 2. When the heat pump unit operates in refrigeration cycle mode, the high-temperature and high-pressure steam discharged from the compressor 2 enters the upstream circulation pipe, releases heat to the air, and condenses into refrigerant. Then, the refrigerant flows from the upstream circulation pipe into the first end of the first tee pipe 3, from the third end of the first tee pipe 3 into the first end of the economizer 1, and then flows out from the second end of the economizer 1 into the third end of the second tee pipe 4. It then flows from the first end of the second tee pipe 4 into the downstream circulation pipe. In the downstream circulation pipe, it undergoes pressure reduction treatment to become a mixture of low-temperature and low-pressure liquid refrigerant and gaseous refrigerant, and then evaporates into low-temperature and low-pressure gaseous refrigerant and flows back to the compressor 2.

[0037] In addition, the heat pump unit in this embodiment also includes a control module, an ambient temperature sensor, and an outlet water temperature sensor.

[0038] An ambient temperature sensor is used to detect the ambient temperature where the heat pump unit is located;

[0039] The outlet water temperature sensor is used to detect the outlet water temperature of the heat pump unit;

[0040] The control module is used to acquire the ambient temperature and outlet water temperature, and to detect the execution status of the heat pump unit's enthalpy-increasing action. It determines whether the ambient temperature, outlet water temperature, or the execution status of the enthalpy-increasing action meets the preset enthalpy-increasing conditions. If the preset enthalpy-increasing conditions are met, it controls the first valve to close and the second valve to open. If the preset enthalpy-increasing conditions are not met, it controls the first valve to open and the second valve to close.

[0041] In this embodiment, the control module can be a CPU, MCU, or host computer, etc. The control module is used to acquire the ambient temperature and outlet water temperature in real time, detect the execution status of the heat pump unit's enthalpy-increasing action, and determine whether the ambient temperature, outlet water temperature, or the execution status of the enthalpy-increasing action meets the preset enthalpy-increasing conditions. For example, the control module determines whether the ambient temperature is lower than the preset ambient temperature, whether the outlet water temperature is lower than the preset outlet water temperature, or whether the enthalpy-increasing action has been initiated for the first time. If any one of these three conditions is met, the preset enthalpy-increasing condition is determined to be met. The preset ambient temperature and preset outlet water temperature need to be preset, and can be set according to actual needs. In one embodiment, the preset ambient temperature can be set to -10°C, and the preset outlet water temperature can be preset to 40°C.

[0042] When the control module determines that the preset enthalpy increase condition is met, it needs to control the first valve 6 to close and the second valve 7 to open. With the first valve 6 closed and the second valve 7 open, part of the refrigerant in the first three-way pipe 3 enters the main side of the economizer (i.e., the connection passage formed by the first and second ends of the economizer 1). The other part of the refrigerant in the first three-way pipe 3 will be throttled and cooled by the second valve 7 and then flow into the auxiliary side of the economizer 1 (i.e., the connection passage formed by the third and fourth ends of the economizer 1). After heat exchange between the refrigerant on the auxiliary side and the refrigerant on the main side, the refrigerant on the auxiliary side absorbs the heat from the refrigerant on the main side and evaporates, and then enters the gas injection port of the compressor 2 for gas injection and compression. This process is equivalent to performing an enthalpy increase action to inject gas and increase the enthalpy of the compressor 2. In this way, since the temperature and pressure of the refrigerant are not fully regulated before entering the compressor 2, the refrigerant has a higher temperature and pressure when it enters the compressor 2. The compressor 2 can get more heat during the compression process, thereby increasing the exhaust temperature. This helps to maintain the stable operation of the compressor 2 in low-temperature environments and avoids a significant drop in exhaust temperature during the enthalpy-increasing action.

[0043] If the preset enthalpy increase condition is not met, the control module controls the opening of the first valve 6 and the closing of the second valve 7. With the first valve 6 open and the second valve 7 closed, a portion of the refrigerant flowing out from the main side of the economizer 1 is throttled and depressurized through the first valve 6 before entering the auxiliary side of the economizer 1. On the auxiliary side of the economizer 1, the refrigerant exchanges heat with the refrigerant on the main side, further adjusting the temperature and pressure of the refrigerant. Finally, the refrigerant after heat exchange returns to the compressor 2 for compression. This process is equivalent to performing an enthalpy increase action to replenish the enthalpy of the compressor 2. However, in this method, because the temperature and pressure of the refrigerant are fully regulated before entering the compressor 2, its temperature and pressure reach a state more suitable for the operation of the compressor 2, which helps to reduce the heat generated by the compressor 2 during compression, thereby reducing the exhaust temperature of the compressor 2. That is, in this embodiment, by controlling the opening and closing of the first valve 6 and the second valve 7, refrigerant can be obtained from different locations. By obtaining refrigerant from different locations, the temperature and pressure of the refrigerant flowing into the compressor 2 during enthalpy increase can be adjusted, thereby regulating the exhaust temperature of the compressor 2.

[0044] This invention also provides a method for controlling the operation of a heat pump unit, such as... Figure 2 As shown, Figure 2 This is a flowchart illustrating a heat pump unit operation control method according to an embodiment of the present invention. The heat pump unit operation control method is applicable to the aforementioned heat pump unit and includes the following steps:

[0045] Step 101: Obtain the ambient temperature of the environment where the heat pump unit is located and the outlet water temperature of the heat pump unit, and detect the execution status of the heat pump unit's enthalpy increase action.

[0046] Step 102: Determine whether the ambient temperature, outlet water temperature, or execution status of the enthalpy increase action meets the preset enthalpy increase conditions.

[0047] Step 103: Under the condition of satisfying the preset enthalpy increase condition, control the first valve of the heat pump unit to close and the second valve of the heat pump unit to open.

[0048] Step 104: If the preset enthalpy increase condition is not met, control the first valve to open and the second valve to close.

[0049] This includes determining whether the ambient temperature, outlet water temperature, or enthalpy increase action meets the preset enthalpy increase conditions, including:

[0050] When the ambient temperature is lower than the preset ambient temperature, the outlet water temperature is lower than the preset outlet water temperature, or the enthalpy increase action is started for the first time, the preset enthalpy increase condition is determined to be met.

[0051] In one embodiment, the heat pump unit is described as a dual-supply heat pump unit, as an example. Figure 2As shown, Figure 2 This is a schematic diagram of a dual-supply heat pump unit provided in an embodiment of the present invention. When the heat pump unit is a dual-supply heat pump unit, the heat pump unit also includes a four-way valve 8, a shell-and-tube heat exchanger 9, a main electronic expansion valve 10, a finned heat exchanger 11, and a gas-liquid separator 12. In addition, the first valve 6 and the second valve 7 are both electronic expansion valves.

[0052] In heating mode, compressor 2 first draws in low-pressure refrigerant vapor and compresses it into high-temperature, high-pressure vapor. The high-temperature, high-pressure vapor discharged from compressor 2 is diverted through four-way valve 8 and enters the shell-and-tube heat exchanger 9. In heating mode, the indoor heat exchanger becomes the condenser, and the outdoor heat exchanger becomes the evaporator. The high-temperature, high-pressure vapor releases heat in the shell-and-tube heat exchanger 9, which is used to heat the refrigerant water or other media. After passing through the shell-and-tube heat exchanger 9, the refrigerant vapor enters the economizer 1. In the economizer 1, the refrigerant vapor further releases heat, increasing the subcooling and thus improving the overall efficiency and performance of the system. After passing through the economizer 1, the refrigerant enters the main electronic expansion valve 10, which adjusts the refrigerant flow according to system requirements to ensure stable system operation. After passing through the main electronic expansion valve 10, the refrigerant enters the finned heat exchanger 11. In the finned heat exchanger 11, the refrigerant absorbs heat from the outside environment to complete the evaporation process. The evaporated refrigerant vapor is diverted again through four-way valve 8 and returns to the gas-liquid separator 12. The gas-liquid separator 12 is used to prevent liquid slugging caused by incomplete evaporation of the liquid working fluid in the evaporator from damaging the compressor 2, and to ensure that only superheated dry gas is drawn into the compressor 2 for the next round of compression.

[0053] In the refrigeration cycle, compressor 2 draws in low-temperature, low-pressure refrigerant vapor and compresses it into high-temperature, high-pressure vapor. This high-temperature, high-pressure vapor is then discharged through the exhaust port and enters the four-way valve 8 for reversing. In refrigeration mode, the reversing of the four-way valve 8 allows the high-temperature, high-pressure vapor discharged from compressor 2 to enter the finned heat exchanger 11 (which acts as a condenser at this time). The high-temperature, high-pressure vapor releases heat to the external environment (such as air) in the finned heat exchanger 11, thereby condensing into high-pressure liquid refrigerant. Afterward, the liquid refrigerant undergoes further processing through economizer 1. After passing through economizer 1, the liquid refrigerant is throttled and depressurized by the main electronic expansion valve 10 and then enters the shell-and-tube heat exchanger 9. In the shell-and-tube heat exchanger 9, the liquid refrigerant absorbs heat from the indoor air and evaporates into a gaseous state. The evaporated refrigerant vapor is then reversing through the four-way valve 8 again and enters the gas-liquid separator 12 to remove any possible liquid refrigerant droplets before returning to compressor 2 for the next cycle.

[0054] When the dual-heat pump unit is in heating or cooling mode, if the control module determines that the ambient temperature is less than -10°C, the outlet water temperature is less than 40°C, or the enthalpy increase action is initiated for the first time, it confirms that the preset enthalpy increase conditions are met. At this time, the control module closes the first valve 6 and opens the second valve 7. At this time, part of the refrigerant in the first three-way pipe 3 enters the main side of the economizer. The other part of the refrigerant in the first three-way pipe 3 will flow into the auxiliary side of the economizer 1 after being throttled and cooled by the second valve 7. After heat exchange between the refrigerant on the auxiliary side and the refrigerant on the main side, the refrigerant on the auxiliary side absorbs the heat of the refrigerant on the main side and evaporates, and then enters the compressor 2 for gas replenishment and compression.

[0055] If the preset enthalpy increase condition is not met, the control module controls the opening of the first valve 6 and the closing of the second valve 7. With the first valve 6 open and the second valve 7 closed, a portion of the refrigerant flowing from the main side of the economizer 1 is throttled and depressurized through the first valve 6 before entering the auxiliary side of the economizer 1. On the auxiliary side of the economizer 1, the refrigerant exchanges heat with the refrigerant on the main side, further adjusting the temperature and pressure of the refrigerant. Finally, the refrigerant after heat exchange returns to the compressor 2 for compression.

[0056] As described above, this embodiment of the invention provides a heat pump unit. When the control module in the heat pump unit determines that the ambient temperature, outlet water temperature, or the execution state of the enthalpy-increasing action meets the preset enthalpy-increasing conditions, it controls the first valve to close and the second valve to open. This allows for the acquisition of refrigerant with insufficient temperature and pressure regulation from the upstream circulation pipeline of the economizer. Because the refrigerant subsequently enters the compressor with a higher temperature and / or pressure, the compressor can obtain more heat during compression, thereby increasing the exhaust temperature. This helps maintain stable compressor operation in low-temperature environments and avoids a significant drop in exhaust temperature during the enthalpy-increasing action. Conversely, when the preset enthalpy-increasing conditions are not met, the first valve is opened and the second valve is closed. This allows for the acquisition of refrigerant with sufficient temperature and pressure regulation from the downstream circulation pipeline of the economizer. When the refrigerant subsequently flows into the compressor, its temperature and pressure reach a state more suitable for compressor operation, helping to reduce the heat generated by the compressor during compression, thereby lowering the compressor's exhaust temperature. In this embodiment of the invention, by controlling the opening and closing of the first and second valves, refrigerant can be obtained from different locations. By obtaining refrigerant from different locations, the temperature and pressure of the refrigerant flowing into the compressor during enthalpy increase can be adjusted, thereby regulating the compressor's exhaust temperature. This solves the technical problem in the prior art where the activation of the enthalpy increase action causes a rapid drop in the exhaust temperature of the heat pump unit under low ambient temperature or low water temperature conditions.

[0057] This invention also provides a heat pump unit operation control device, such as... Figure 4 As shown, Figure 4This is a schematic diagram of a heat pump unit operation control device provided in an embodiment of the present invention. The heat pump unit operation control device is applicable to the above-mentioned heat pump unit and includes:

[0058] The data acquisition module 201 is used to acquire the ambient temperature of the environment where the heat pump unit is located and the outlet water temperature of the heat pump unit, as well as to detect the execution status of the heat pump unit's enthalpy increase action.

[0059] The condition judgment module 202 is used to determine whether the ambient temperature, outlet water temperature or the execution status of the enthalpy increase action meets the preset enthalpy increase conditions.

[0060] The enthalpy compensation module 203 is used to control the first valve of the heat pump unit to close and the second valve of the heat pump unit to open when the preset enthalpy conditions are met.

[0061] The enthalpy increase uncompensated module 204 is used to control the opening of the first valve and the closing of the second valve when the preset enthalpy increase condition is not met.

[0062] Specifically, the condition judgment module 202 is used to determine whether the preset enthalpy increase condition is met when the ambient temperature is lower than the preset ambient temperature, the outlet water temperature is lower than the preset outlet water temperature, or the enthalpy increase action is started for the first time.

[0063] The heat pump unit operation control device provided in this embodiment of the invention is included in the heat pump unit and can be used to execute the heat pump unit operation control method provided in the above embodiment, and has corresponding functions and beneficial effects.

[0064] It is worth noting that in the embodiments of the above-mentioned heat pump unit operation control device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0065] This invention also provides a storage medium containing computer-executable instructions. When executed by a computer processor, these instructions are used to perform a heat pump unit operation control method. The method is applicable to the aforementioned heat pump unit and includes:

[0066] The system acquires the ambient temperature of the environment where the heat pump unit is located and the outlet water temperature of the heat pump unit, and detects the execution status of the heat pump unit's enthalpy-increasing action.

[0067] Determine whether the ambient temperature, outlet water temperature, or execution status of the enthalpy increase action meets the preset enthalpy increase conditions;

[0068] Under the condition of satisfying the preset enthalpy increase, the first valve of the heat pump unit is shut off and the second valve of the heat pump unit is opened.

[0069] If the preset enthalpy increase condition is not met, the first valve is opened and the second valve is closed.

[0070] Note that the above are merely preferred embodiments and the technical principles applied in this invention. Those skilled in the art will understand that the embodiments of this invention are not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of this invention. Therefore, although the embodiments of this invention have been described in detail above, the embodiments of this invention are not limited to the above embodiments. More other equivalent embodiments may be included without departing from the concept of the embodiments of this invention, and the scope of the embodiments of this invention is determined by the scope of the appended claims.

Claims

1. A heat pump unit, characterized in that, The heat pump unit includes an economizer, a compressor, a first tee pipe, a second tee pipe, a third tee pipe, a first valve, and a second valve. The first end of the first tee pipe is connected to the upstream circulation pipeline; the second end of the first tee pipe is connected to the second end of the second valve; the third end of the first tee pipe is connected to the first end of the economizer; the second end of the economizer is connected to the third end of the second tee pipe; the first end of the second tee pipe is connected to the downstream circulation pipeline; the second end of the second tee pipe is connected to the first end of the first valve; the second end of the first valve is connected to the first end of the third tee pipe; the second end of the third tee pipe is connected to the first end of the second valve; the third end of the third tee pipe is connected to the third end of the economizer; the fourth end of the economizer is connected to the first end of the compressor; the first end of the economizer is connected to the second end of the economizer; and the third end of the economizer is connected to the fourth end of the economizer. Refrigerant flows from the upstream circulation pipeline into the first end of the first tee pipe. The heat pump unit also includes a control module, an ambient temperature sensor, and an outlet water temperature sensor. The ambient temperature sensor is used to detect the ambient temperature where the heat pump unit is located; The outlet water temperature sensor is used to detect the outlet water temperature of the heat pump unit; The control module is used to acquire the ambient temperature and the outlet water temperature, and to detect the execution status of the heat pump unit's enthalpy-increasing action, and to determine whether the ambient temperature, the outlet water temperature, or the execution status of the enthalpy-increasing action meets the preset enthalpy-increasing conditions; if the preset enthalpy-increasing conditions are met, the module controls the first valve to close and the second valve to open; if the preset enthalpy-increasing conditions are not met, the module controls the first valve to open and the second valve to close. Specifically, the control module is used to determine whether the preset enthalpy increase condition is met when the ambient temperature is lower than the preset ambient temperature, the outlet water temperature is lower than the preset outlet water temperature, or the enthalpy increase action is started for the first time.

2. The heat pump unit according to claim 1, characterized in that, The preset ambient temperature is -10°C, and the preset outlet water temperature is 40°C.

3. The heat pump unit according to claim 1, characterized in that, The first valve and the second valve are electronic expansion valves.

4. A method for controlling the operation of a heat pump unit, characterized in that, The method is applicable to a heat pump unit according to claim 1, and the method includes: The ambient temperature of the environment where the heat pump unit is located and the outlet water temperature of the heat pump unit are obtained, and the execution status of the enthalpy increase action of the heat pump unit is detected. Determine whether the ambient temperature, the outlet water temperature, or the execution status of the enthalpy increase action meets the preset enthalpy increase conditions; Under the condition that the preset enthalpy increase condition is met, the first valve of the heat pump unit is shut off and the second valve of the heat pump unit is opened. If the preset enthalpy increase condition is not met, control the first valve to open and the second valve to close. The step of determining whether the ambient temperature, the outlet water temperature, or the execution state of the enthalpy increase action meets the preset enthalpy increase conditions includes: When the ambient temperature is lower than the preset ambient temperature, the outlet water temperature is lower than the preset outlet water temperature, or the enthalpy increase action is initiated for the first time, it is determined that the preset enthalpy increase condition is met.

5. The heat pump unit operation control method according to claim 4, characterized in that, The preset ambient temperature is -10°C, and the preset outlet water temperature is 40°C.

6. The heat pump unit operation control method according to claim 4, characterized in that, The first valve and the second valve are electronic expansion valves.

7. A heat pump unit operation control device, characterized in that, The heat pump unit operation control device is applicable to a heat pump unit as described in claim 1, and the heat pump unit operation control device includes: The data acquisition module is used to acquire the ambient temperature of the environment where the heat pump unit is located and the outlet water temperature of the heat pump unit, as well as to detect the execution status of the enthalpy increase action of the heat pump unit. The condition judgment module is used to determine whether the ambient temperature, the outlet water temperature, or the execution status of the enthalpy increase action meets the preset enthalpy increase conditions. The enthalpy compensation module is used to control the first valve of the heat pump unit to close and the second valve of the heat pump unit to open when the preset enthalpy increase condition is met. The enthalpy increase uncompensated module is used to control the opening of the first valve and the closing of the second valve when the preset enthalpy increase condition is not met. The condition judgment module is specifically used to determine that the preset enthalpy increase condition is met when the ambient temperature is less than the preset ambient temperature, the outlet water temperature is less than the preset outlet water temperature, or the enthalpy increase action is started for the first time.

8. A storage medium for storing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform a heat pump unit operation control method as described in any one of claims 4-6.

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