Heat pump unit, heat pump unit operation control method and device and storage medium

Abstract

The embodiment of the invention discloses a heat pump unit, a heat pump unit operation control method and device and a storage medium. When a control module in the heat pump unit judges that the execution state of the environment temperature, the water outlet temperature or the enthalpy increasing action meets the preset enthalpy increasing condition, a first valve is controlled to be switched off, and a second valve is controlled to be switched on; the temperature and the pressure of the refrigerant are not fully adjusted from an upstream circulating pipeline of the economizer; and when the preset enthalpy increasing condition is not met, the first valve is controlled to be opened, and the second valve is controlled to be closed, so that the temperature and the pressure are obtained from the downstream circulation pipeline of the economizer to obtain the sufficient adjustment refrigerant. According to the embodiment of the invention, the refrigerant is obtained from different positions by controlling the opening and closing of the first valve and the second valve, and the temperature and pressure of the refrigerant flowing into the compressor during enthalpy increase can be adjusted by obtaining the refrigerant from different positions, so that the exhaust temperature of the compressor is adjusted.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of heat pump units, and in particular to a heat pump unit, a heat pump unit operation control method, a device, and a storage medium. Background Art

[0002] A two-way heat pump unit refers to a device that uses an air source heat pump system to provide hot water, heating, or both heating and cooling. The two-way heat pump unit is usually composed of a compressor, a finned heat exchanger, a shell and tube heat exchanger, and a water pump.

[0003] At present, in order to meet the heating needs of different users, the dual-generation heat pump unit needs to set the activation logic of the enthalpy increase action under different working conditions. However, under low ambient temperature or low water temperature conditions, the activation of the enthalpy increase action will cause the exhaust temperature of the heat pump unit to drop rapidly, and the rapid drop in exhaust temperature will increase the risk of liquid return of the compressor, thereby affecting the operating safety of the dual-generation heat pump unit. Summary of the invention

[0004] The embodiments of the present invention provide a heat pump unit, a heat pump unit operation control method, a device and a storage medium, which solve the technical problem in the prior art that the activation of the enthalpy increase action under low ambient temperature or low water temperature conditions will cause the exhaust temperature of the heat pump unit to drop rapidly.

[0005] In a first aspect, an embodiment of the present invention provides a heat pump unit, the heat pump unit comprising an economizer, a compressor, a first three-way pipe, a second three-way pipe, a third three-way pipe, a first valve and a second valve, wherein the first end of the first three-way pipe is connected to an upstream circulation pipeline, the second end of the first three-way pipe is connected to the second end of the second valve, the third end of the first three-way 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 three-way pipe, the first end of the second three-way pipe is connected to a downstream circulation pipeline, the second end of the second three-way 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 three-way pipe, the second end of the third three-way pipe is connected to the first end of the second valve, the third end of the third three-way 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 communicated with the second end of the economizer, the third end of the economizer is communicated with the fourth end of the economizer, and the refrigerant flows from the upstream circulation pipeline into the first end of the first three-way pipe;

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

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

[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 obtain the ambient temperature and the outlet water temperature, and detect the execution status of the enthalpy increase action of the heat pump unit, to determine whether the ambient temperature, the outlet water temperature or the execution status of the enthalpy increase action meets the preset enthalpy increase condition; when the preset enthalpy increase condition is met, the first valve is controlled to be closed and the second valve is controlled to be opened; when the preset enthalpy increase condition is not met, the first valve is controlled to be opened and the second valve is controlled to be closed.

[0010] The control module is specifically used to determine whether the preset enthalpy increase condition is satisfied 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] Among them, the preset ambient temperature is -10°, and the preset water outlet temperature is 40°.

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

[0013] In a second aspect, an embodiment of the present invention provides a heat pump unit operation control method, the method is applicable to a heat pump unit described in the first aspect, the method comprising:

[0014] Acquiring the ambient temperature of the environment in which the heat pump unit is located and the outlet water temperature of the heat pump unit, and detecting the execution state of the enthalpy increase action of the heat pump unit;

[0015] Determining whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action satisfies a preset enthalpy increase condition;

[0016] When the preset enthalpy increase condition is met, controlling the first valve of the heat pump unit to be closed and the second valve of the heat pump unit to be opened;

[0017] When the preset enthalpy increase condition is not met, the first valve is controlled to be opened and the second valve is controlled to be closed.

[0018] Wherein, the determining whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action satisfies a preset enthalpy increase condition includes:

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

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

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

[0022] In a third aspect, an embodiment of the present invention provides a heat pump unit operation control device, the heat pump unit operation control device is applicable to a heat pump unit according to the first aspect, and the heat pump unit operation control device comprises:

[0023] A data acquisition module, used to acquire the ambient temperature of the environment in which the heat pump unit is located and the outlet water temperature of the heat pump unit, and to detect the execution state of the enthalpy increase action of the heat pump unit;

[0024] A condition judgment module, used to determine whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action meets a preset enthalpy increase condition;

[0025] An enthalpy increase compensation module, used to control the first valve of the heat pump unit to be closed and the second valve of the heat pump unit to be opened when the preset enthalpy increase condition is met;

[0026] The enthalpy increase non-compensation module is used to control the first valve to open and the second valve to close when the preset enthalpy increase condition is not met.

[0027] In a fourth aspect, an embodiment of the present invention provides a storage medium storing computer executable instructions, wherein the computer executable instructions, when executed by a computer processor, are used to execute a heat pump unit operation control method as described in the second aspect.

[0028] The embodiment of the present invention provides a heat pump unit, a heat pump unit operation control method, device and storage medium. When the control module in the heat pump unit determines that the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action meets the preset enthalpy increase condition, the first valve is controlled to be closed and the second valve is controlled to be opened to obtain the refrigerant whose temperature and pressure are not fully regulated from the upstream circulation pipeline of the economizer. Since the subsequent refrigerant has a higher temperature and / or pressure when entering the compressor, the compressor can obtain more heat supplement during the compression process to increase the exhaust temperature, which helps to maintain the stable operation of the compressor in a low temperature environment and avoid a significant decrease in the exhaust temperature during the process of starting the enthalpy increase action. When the preset enthalpy increase condition is not met, the first valve is controlled to be opened and the second valve is controlled to be closed to obtain the refrigerant whose temperature and pressure are fully regulated from the downstream circulation pipeline of the economizer. When the subsequent refrigerant flows into the compressor, its temperature and pressure reach a state more suitable for the operation of the compressor, which helps to reduce the heat generated by the compressor during the compression process, thereby reducing the exhaust temperature of the compressor. In the embodiment of the present invention, the opening and closing of the first valve and the second valve are controlled to obtain refrigerant from different positions. By obtaining refrigerant from different positions, the temperature and pressure of the refrigerant flowing into the compressor during enthalpy increase can be adjusted, thereby adjusting the exhaust temperature of the compressor. The technical problem in the prior art that the opening of the enthalpy increase action under low ambient temperature or low water temperature conditions causes the exhaust temperature of the heat pump unit to drop rapidly is solved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0030] Figure 2 A schematic flow chart of a heat pump unit operation control method provided in an embodiment of the present invention.

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

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

[0033] Figure numerals: economizer 1, compressor 2, first three-way pipe 3, second three-way pipe 4, third three-way pipe 5, first valve 6, second valve 7, four-way valve 8, shell and tube heat exchanger 9, main electronic expansion valve 10, fin heat exchanger 11, gas-liquid separator 12. DETAILED DESCRIPTION

[0034] The following description and accompanying drawings fully illustrate the specific embodiments of the present application so that those skilled in the art can practice them. The examples represent possible variations only. Unless explicitly required, separate components and functions are optional, and the order of operation can vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. The scope of the embodiments of the present application includes the entire scope of the claims, and all available equivalents of the claims. In this article, each embodiment may be represented individually or generally by the term "invention", which is only for convenience, and if more than one invention is disclosed in fact, it is not intended to automatically limit the scope of the application to any single invention or inventive concept. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. The various embodiments are described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. As for the structures, products, etc. disclosed in the embodiments, since they correspond to the parts disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0035] The embodiment of the present invention provides a heat pump unit, such as Figure 1 As shown, Figure 1A structural schematic diagram of a heat pump unit provided in an embodiment of the present invention, the heat pump unit provided in an embodiment of the present invention includes an economizer 1, a compressor 2, a first three-way pipe 3, a second three-way pipe 4, a third three-way pipe 5, a first valve 6 and a second valve 7, the first end of the first three-way pipe 3 is connected to the upstream circulation pipeline, the second end of the first three-way pipe 3 is connected to the second end of the second valve 7, the third end of the first three-way 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 three-way pipe 4, the first end of the second three-way pipe 4 is connected to the downstream circulation pipeline, the second end of the second three-way 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 three-way pipe 5, the second end of the third three-way pipe 5 is connected to the first end of the second valve 7, the third end of the third three-way 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 from the upstream circulation pipeline into the first end of the first three-way pipe 3. The upstream circulation pipeline and the downstream circulation pipeline are only relative to the economizer 1. The starting point of the upstream circulation pipeline is the compressor 2, and the end point of the downstream circulation pipeline is the compressor 2, forming a complete cycle. In addition, the flow paths of the upstream circulation pipeline and the downstream circulation pipeline are not fixed, but are determined by the working mode of the heat pump unit.

[0036] For example, when the working mode of the heat pump unit is the heating cycle, the high-temperature and high-pressure steam discharged by the compressor 2 enters the upstream circulation pipeline to release heat to the heating system and then condenses into a refrigerant. The refrigerant then flows from the upstream circulation pipeline into the first end of the first three-way pipe 3, flows from the third end of the first three-way pipe 3 into the first end of the economizer 1, flows out from the second end of the economizer 1 to the third end of the second three-way pipe 4, and then flows from the first end of the second three-way pipe 4 into the downstream circulation pipeline, undergoes a pressure reduction process in the downstream circulation pipeline to become a mixture of a low-temperature and low-pressure liquid refrigerant and a gaseous refrigerant, and then evaporates into a low-temperature and low-pressure gaseous refrigerant and flows back to the compressor 2. When the working mode of the heat pump unit is a refrigeration cycle, the high-temperature and high-pressure steam discharged from the compressor 2 enters the upstream circulation pipeline to release heat to the air and condense into a refrigerant. Then, the refrigerant flows from the upstream circulation pipeline into the first end of the first three-way pipe 3, flows from the third end of the first three-way pipe 3 into the first end of the economizer 1, flows out from the second end of the economizer 1 to the third end of the second three-way pipe 4, and then flows from the first end of the second three-way pipe 4 into the downstream circulation pipeline. After being reduced in pressure in the downstream circulation pipeline to become a mixture of low-temperature and low-pressure liquid refrigerant and gaseous refrigerant, the refrigerant evaporates into a 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 a water outlet temperature sensor.

[0038] The ambient temperature sensor is used to detect the ambient temperature of the heat pump unit;

[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 obtain the ambient temperature and the outlet water temperature, and to detect the execution status of the enthalpy increase action of the heat pump unit, to determine whether the ambient temperature, the outlet water temperature or the execution status of the enthalpy increase action meets the preset enthalpy increase condition; when the preset enthalpy increase condition is met, the first valve is controlled to be closed and the second valve is controlled to be opened; when the preset enthalpy increase condition is not met, the first valve is controlled to be opened and the second valve is controlled to be closed.

[0041] In this embodiment, the control module can be a CPU, MCU or a host computer, etc. The control module is used to obtain the ambient temperature and the outlet water temperature in real time, detect the execution state of the enthalpy increase action of the heat pump unit, and determine whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action meets the preset enthalpy increase condition. Exemplarily, the control module determines whether the ambient temperature is less than the preset ambient temperature, whether the outlet water temperature is less than the preset outlet water temperature, or whether the enthalpy increase action is started for the first time. When any one of the above three conditions is met, it is determined that the preset enthalpy increase condition is met. The preset ambient temperature and the preset outlet water temperature need to be set in advance, and can be set according to actual needs. In one embodiment, the preset ambient temperature can be set to -10°, and the preset outlet water temperature can be preset to 40°.

[0042] When the control module determines that the preset enthalpy increase condition is currently met, it is necessary to control the first valve 6 to be closed and the second valve 7 to be opened. When the first valve 6 is closed and the second valve 7 is opened, part of the refrigerant in the first three-way pipe 3 enters the main side of the economizer (i.e., the connecting passage formed by the first end and the second end of the economizer 1). The other part of the refrigerant in the first three-way pipe 3 will flow into the auxiliary side of the economizer 1 (i.e., the connecting passage formed by the third end and the fourth end of the economizer 1) after throttling and cooling by the second valve 7. After the refrigerant on the auxiliary side exchanges heat with 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 air supply port of the compressor 2 for air supply compression. This process is equivalent to executing the enthalpy increase action to increase the enthalpy of the compressor 2. In this way, since the temperature and pressure of the refrigerant are not fully adjusted before entering the compressor 2, the refrigerant has a higher temperature and pressure when entering the compressor 2. The compressor 2 can obtain more heat supplement during the compression process to increase the exhaust temperature, which helps to maintain stable operation of the compressor 2 in a low temperature environment and avoid a significant drop in the exhaust temperature during the process of starting the enthalpy increase action.

[0043] When the preset enthalpy increase condition is not met, the control module controls the first valve 6 to open and the second valve 7 to close. When the first valve 6 is opened and the second valve 7 is closed, part of the refrigerant flowing out of the main side of the economizer 1 enters the auxiliary side of the economizer 1 after throttling and reducing the pressure through the first valve 6. On the auxiliary side of the economizer 1, the refrigerant exchanges heat with the main side refrigerant, and the temperature and pressure of the refrigerant are further adjusted. Finally, the refrigerant after heat exchange returns to the compressor 2 for compression. This process is also equivalent to performing an enthalpy increase action to replenish air and increase enthalpy for the compressor 2. However, in this way, since the temperature and pressure of the refrigerant are fully adjusted before entering the compressor 2, so that its temperature and pressure reach a state more suitable for the operation of the compressor 2, it is helpful to reduce the heat generated by the compressor 2 during the compression process, 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, the refrigerant is obtained from different positions. By obtaining the refrigerant from different positions, the temperature and pressure of the refrigerant flowing into the compressor 2 during the enthalpy increase can be adjusted, thereby adjusting the exhaust temperature of the compressor 2.

[0044] The embodiment of the present invention also provides a heat pump unit operation control method, such as Figure 2 As shown, Figure 2 The present invention provides a flow chart of a heat pump unit operation control method provided in an embodiment of the present invention. The heat pump unit operation control method is applicable to the above-mentioned heat pump unit. The heat pump unit operation control method comprises the following steps:

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

[0046] Step 102: Determine whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action satisfies a preset enthalpy increase condition.

[0047] Step 103: When a preset enthalpy increase condition is met, control the first valve of the heat pump unit to be closed and the second valve of the heat pump unit to be opened.

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

[0049] Wherein, determining whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action satisfies the preset enthalpy increase condition includes:

[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, it is determined that the preset enthalpy increase condition is met.

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

[0052] In heating mode, compressor 2 first sucks in low-pressure refrigerant vapor and compresses it into high-temperature and high-pressure vapor. The high-temperature and high-pressure vapor discharged from compressor 2 enters tube heat exchanger 9 after being reversed by four-way valve 8. In heating mode, the indoor heat exchanger becomes a condenser and the outdoor heat exchanger becomes an evaporator. The high-temperature and high-pressure vapor releases heat in tube heat exchanger 9, which is used to heat refrigerant water or other media. After passing through tube heat exchanger 9, the refrigerant vapor enters economizer 1. In economizer 1, the refrigerant vapor further releases heat to increase the degree of supercooling, thereby improving the overall efficiency and performance of the system. After passing through economizer 1, the refrigerant enters the main electronic expansion valve 10, which adjusts the refrigerant flow according to system requirements to ensure stable operation of the system. After passing through the main electronic expansion valve 10, the refrigerant enters the fin heat exchanger 11. In the fin heat exchanger 11, the refrigerant absorbs external heat to complete the evaporation process. The evaporated refrigerant vapor is reversed again by four-way valve 8 and returns to gas-liquid separator 12. The gas-liquid separator 12 is used to prevent the liquid hammer phenomenon caused by the incomplete evaporation of the liquid working medium in the evaporator from causing damage to the compressor 2, and ensure that only dry superheated gas is sucked into the compressor 2 for the next round of compression.

[0053] In the refrigeration cycle, the compressor 2 inhales low-temperature, low-pressure refrigerant vapor and compresses it into high-temperature, high-pressure vapor. These high-temperature, high-pressure vapors are then discharged through the exhaust port and enter the four-way valve 8 for reversing. In the refrigeration mode, the reversal of the four-way valve 8 allows the high-temperature, high-pressure vapor discharged from the compressor 2 to enter the fin heat exchanger 11 (which serves as a condenser at this time). The high-temperature, high-pressure vapor releases heat to the external environment (such as air) in the fin heat exchanger 11, thereby condensing into a high-pressure liquid refrigerant. After that, the liquid refrigerant is further processed by the economizer 1. The liquid refrigerant passing through the economizer 1 enters the shell and tube heat exchanger 9 after throttling and reducing the pressure through the main electronic expansion valve 10, where the liquid refrigerant absorbs the heat of the indoor air and evaporates into a gaseous state. The evaporated refrigerant vapor is reversed through the four-way valve 8 again and enters the gas-liquid separator 12, and after removing any possible liquid refrigerant drops, it returns to the compressor 2 for the next cycle.

[0054] When the combined heat pump unit is in heating mode or cooling mode, when the control module determines that the ambient temperature is less than -10°, the outlet water temperature is less than 40°, or the enthalpy increase action is started for the first time, it is determined that the preset enthalpy increase condition is met. At this time, the control module turns off 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 throttling and cooling through the second valve 7. After the refrigerant on the auxiliary side exchanges heat with 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 air replenishment compression.

[0055] When the preset enthalpy increase condition is not met, the control module controls the first valve 6 to open and the second valve 7 to close. When the first valve 6 is opened and the second valve 7 is closed, part of the refrigerant flowing out of the primary side of the economizer 1 is throttled and depressurized by the first valve 6, and then the refrigerant enters the secondary side of the economizer 1. On the secondary side of the economizer 1, the refrigerant exchanges heat with the primary side refrigerant, and the temperature and pressure of the refrigerant are further adjusted. Finally, the refrigerant after heat exchange returns to the compressor 2 for compression.

[0056] As described above, an embodiment of the present invention provides a heat pump unit. When the control module in the heat pump unit determines that the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action meets the preset enthalpy increase condition, the first valve is controlled to be closed and the second valve is controlled to be opened, so as to obtain the refrigerant whose temperature and pressure are not fully regulated from the upstream circulation pipeline of the economizer. Since the subsequent refrigerant has a higher temperature and / or pressure when entering the compressor, the compressor can obtain more heat supplement during the compression process to increase the exhaust temperature, which helps to maintain the stable operation of the compressor in a low temperature environment and avoid a significant decrease in the exhaust temperature during the process of starting the enthalpy increase action. When the preset enthalpy increase condition is not met, the first valve is controlled to be opened and the second valve is controlled to be closed, so as to obtain the refrigerant whose temperature and pressure are fully regulated from the downstream circulation pipeline of the economizer. When the subsequent refrigerant flows into the compressor, its temperature and pressure reach a state more suitable for the operation of the compressor, which helps to reduce the heat generated by the compressor during the compression process, thereby reducing the exhaust temperature of the compressor. In the embodiment of the present invention, the opening and closing of the first valve and the second valve are controlled to obtain refrigerant from different positions. By obtaining refrigerant from different positions, the temperature and pressure of the refrigerant flowing into the compressor during enthalpy increase can be adjusted, thereby adjusting the exhaust temperature of the compressor. The technical problem in the prior art that the opening of the enthalpy increase action under low ambient temperature or low water temperature conditions causes the exhaust temperature of the heat pump unit to drop rapidly is solved.

[0057] The embodiment of the present invention also provides a heat pump unit operation control device, such as Figure 4 As shown, Figure 4This is a schematic diagram of the structure 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. The heat pump unit operation control device includes:

[0058] The data acquisition module 201 is used to acquire the ambient temperature of the environment in which the heat pump unit is located and the outlet water temperature of the heat pump unit, and to detect the execution status of the enthalpy increase action of the heat pump unit;

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

[0060] The enthalpy increase compensation module 203 is used to control the first valve of the heat pump unit to be closed and the second valve of the heat pump unit to be opened when the preset enthalpy increase condition is met;

[0061] The enthalpy increase non-compensation module 204 is used to control the first valve to open and the second valve to close when the preset enthalpy increase condition is not met.

[0062] The condition judgment module 202 is specifically 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 the embodiment of the present 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 embodiment 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-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0065] The embodiment of the present invention further provides a storage medium containing computer executable instructions. When the computer executable instructions are executed by a computer processor, they are used to execute a heat pump unit operation control method. The method is applicable to the above-mentioned heat pump unit. The heat pump unit operation control method includes:

[0066] Obtaining the ambient temperature of the environment in which the heat pump unit is located and the outlet water temperature of the heat pump unit, and detecting the execution status of the heat pump unit's enthalpy increase action;

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

[0068] When the preset enthalpy increase condition is met, the first valve of the heat pump unit is controlled to be closed and the second valve of the heat pump unit is controlled to be opened;

[0069] When the preset enthalpy increase condition is not met, the first valve is controlled to be opened and the second valve is controlled to be closed.

[0070] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the embodiments of the present invention are not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the embodiments of the present invention. Therefore, although the embodiments of the present invention are described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present 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 three-way pipe, a second three-way pipe, a third three-way pipe, a first valve and a second valve, wherein the first end of the first three-way pipe is connected to an upstream circulation pipeline, the second end of the first three-way pipe is connected to the second end of the second valve, the third end of the first three-way 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 three-way pipe, the first end of the second three-way pipe is connected to a downstream circulation pipeline, the second end of the second three-way 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 three-way pipe, the second end of the third three-way pipe is connected to the first end of the second valve, the third end of the third three-way 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 communicated with the second end of the economizer, the third end of the economizer is communicated with the fourth end of the economizer, and the refrigerant flows from the upstream circulation pipeline into the first end of the first three-way pipe; The heat pump unit also includes a control module, an ambient temperature sensor and a water outlet temperature sensor; The ambient temperature sensor is used to detect the ambient temperature of the heat pump unit; The outlet water temperature sensor is used to detect the outlet water temperature of the heat pump unit; The control module is used to obtain the ambient temperature and the outlet water temperature, and detect the execution status of the enthalpy increase action of the heat pump unit, to determine whether the ambient temperature, the outlet water temperature or the execution status of the enthalpy increase action meets the preset enthalpy increase condition; when the preset enthalpy increase condition is met, the first valve is controlled to be closed and the second valve is controlled to be opened; when the preset enthalpy increase condition is not met, the first valve is controlled to be opened and the second valve is controlled to be closed.

2. The heat pump unit according to claim 1, characterized in that: The control module is specifically used to determine whether the preset enthalpy increase condition is satisfied 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.

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

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

5. A heat pump unit operation control method, characterized in that: The method is applicable to a heat pump unit according to claim 1, and the method comprises: Acquiring the ambient temperature of the environment in which the heat pump unit is located and the outlet water temperature of the heat pump unit, and detecting the execution state of the enthalpy increase action of the heat pump unit; Determining whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action satisfies a preset enthalpy increase condition; When the preset enthalpy increase condition is met, controlling the first valve of the heat pump unit to be closed and the second valve of the heat pump unit to be opened; When the preset enthalpy increase condition is not met, the first valve is controlled to be opened and the second valve is controlled to be closed.

6. The heat pump unit operation control method according to claim 5, characterized in that: The determining whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action satisfies a preset enthalpy increase condition includes: When the ambient temperature is lower than a preset ambient temperature, the outlet water temperature is lower than a preset outlet water temperature, or the enthalpy increase action is started for the first time, it is determined that the preset enthalpy increase condition is met.

7. The heat pump unit operation control method according to claim 6, characterized in that: The preset ambient temperature is -10°, and the preset water outlet temperature is 40°.

8. The heat pump unit operation control method according to claim 5, characterized in that: The first valve and the second valve are electronic expansion valves.

9. A heat pump unit operation control device, characterized in that: The heat pump unit operation control device is applicable to a heat pump unit according to claim 1, and the heat pump unit operation control device comprises: A data acquisition module, used to acquire the ambient temperature of the environment in which the heat pump unit is located and the outlet water temperature of the heat pump unit, and to detect the execution state of the enthalpy increase action of the heat pump unit; A condition judgment module, used to determine whether the ambient temperature, the outlet water temperature or the execution state of the enthalpy increase action meets a preset enthalpy increase condition; An enthalpy increase compensation module, used to control the first valve of the heat pump unit to be closed and the second valve of the heat pump unit to be opened when the preset enthalpy increase condition is met; The enthalpy increase non-compensation module is used to control the first valve to open and the second valve to close when the preset enthalpy increase condition is not met.

10. A storage medium storing computer executable instructions, characterized in that: The computer executable instructions are used to execute a heat pump unit operation control method as described in any one of claims 5 to 8 when executed by a computer processor.

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