Heat pump water heater control method and device, heat pump water heater and storage medium

Abstract

The invention discloses a heat pump water heater control method and device, a heat pump water heater and a storage medium, and belongs to the technical field of heat pump systems. When it is detected that the heat storage module releases heat, the temperature of the heat storage module is detected; and a heat pump operation mode and an electric auxiliary heating operation mode are adjusted according to the temperature of the heat storage module, and the heat pump water heater is controlled to make water. In this way, when it is detected that a user uses hot water heated by the heat pump water heater, the temperature of the heat storage module is continuously detected, then the operation modes of the heat pump and the electric auxiliary heating module are adjusted in real time according to the temperature change of the heat storage module, and the heating power and efficiency of the heat pump water heater are adjusted according to the temperature of the heat storage module; in different stages, different output states of the heat pump and the electric auxiliary heater are controlled, the heat storage module is rapidly charged with heat in a low-energy-consumption mode, it is guaranteed that the heat of charged heat and discharged heat meets the requirement for domestic water, and therefore the requirement of a user for using hot water is met.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump systems, and in particular, to a control method and device for a heat pump water heater, a heat pump water heater, and a storage medium. Background Art

[0002] Conventional heat pump water heaters generally continuously heat the water in the water tank through a heat pump system, so that the water in the water tank maintains a relatively high water temperature for users to use. However, during the process of users using hot water, the water temperature in the water tank will gradually decrease. When the decrease is large, only by starting the conventional heat pump heat charging function, the heat charging speed is slow and cannot meet the requirements of users for using hot water.

[0003] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main object of the present invention is to provide a control method and device for a heat pump water heater, a heat pump water heater, and a storage medium, aiming to solve the technical problem that the heating is slow when the water temperature in the water tank drops significantly in the prior art, which affects the use.

[0005] To achieve the above object, the present invention provides a control method for a heat pump water heater. The control method for the heat pump water heater is applied to a heat pump water heater, and the heat pump water heater includes a heat pump main unit, a hydraulic module, and a heat storage module. The heat pump main unit includes a compressor, a reversing device, an outdoor heat exchanger, an outdoor fan, and an expansion valve. The hydraulic module includes an electric auxiliary heating device, a water pump, and a water-fluorine heat exchanger. The heat pump main unit is connected to the hydraulic module through the water-fluorine heat exchanger. The heat storage module includes a first heat exchange water circuit and a second heat exchange water circuit. The heat storage module is connected to the hydraulic module through the first heat exchange water circuit. The second heat exchange water circuit is connected to the user's water use pipeline. The first heat exchange water circuit is used for heat storage, and the second heat exchange water circuit is used for heat exchange with the first heat exchange water circuit;

[0006] The control method for the heat pump water heater includes:

[0007] When it is detected that the heat storage module releases heat, detect the temperature of the heat storage module;

[0008] Adjust the heat pump operation mode and the electric auxiliary heating operation mode according to the temperature of the heat storage module, and control the heat pump water heater to produce hot water.

[0009] Optionally, the adjusting the heat pump operation mode and the electric auxiliary heating operation mode according to the temperature of the heat storage module includes:

[0010] When the temperature of the heat storage module is lower than a first temperature threshold, determine whether the heat pump water heater meets the heat pump operation conditions;

[0011] When the heat pump water heater meets the heat pump operation conditions, adjust the heat pump operation mode to the normal hot water production mode, and exit the normal hot water production mode when the temperature of the heat storage module is greater than the second temperature threshold, where the second temperature threshold is greater than the first temperature threshold;

[0012] When the heat pump water heater does not meet the heat pump operation conditions and the temperature of the heat storage module is less than the third temperature threshold, adjust the electric auxiliary heating operation mode to the normal electric auxiliary heating mode, where the third temperature threshold is less than the first temperature threshold.

[0013] Optionally, after determining whether the heat pump water heater meets the heat pump operation conditions when the temperature of the heat storage module is lower than the first temperature threshold, it further includes:

[0014] When the temperature of the heat storage module is less than the third temperature threshold and the heat pump water heater meets the heat pump operation conditions, adjust the heat pump operation mode to the full-load hot water production mode with maximum capacity operation.

[0015] Optionally, after adjusting the electric auxiliary heating operation mode to the normal electric auxiliary heating mode when the heat pump water heater does not meet the heat pump operation conditions and the temperature of the heat storage module is less than the third temperature threshold, it further includes:

[0016] When the temperature of the heat storage module is less than the fourth temperature threshold, adjust the electric auxiliary heating operation mode to the full-load electric auxiliary heating mode with maximum output, and determine whether the heat pump water heater meets the heat pump operation conditions, where the fourth temperature threshold is less than the third temperature threshold and less than the phase change material temperature of the heat storage module;

[0017] When the heat pump water heater meets the heat pump operation conditions, adjust the heat pump operation mode to the full-load hot water production mode.

[0018] Optionally, after adjusting the electric auxiliary heating operation mode to the normal electric auxiliary heating mode when the heat pump water heater does not meet the heat pump operation conditions and the temperature of the heat storage module is less than the third temperature threshold, it further includes:

[0019] When the temperature of the heat storage module is greater than the fifth temperature threshold, adjust the electric auxiliary heating operation mode to the off operation, where the fifth temperature threshold is greater than the third temperature threshold and less than the first temperature threshold.

[0020] Optionally, after adjusting the heat pump operation mode and the electric auxiliary heating operation mode according to the temperature of the heat storage module and controlling the heat pump water heater to produce hot water, it further includes:

[0021] When the electric auxiliary heating operation mode is the full-load electric auxiliary heating mode and the temperature of the heat storage module is greater than the sixth temperature threshold, adjust the electric auxiliary heating operation mode to the normal electric auxiliary heating mode, where the sixth temperature threshold is greater than the fourth temperature threshold and less than the third temperature threshold;

[0022] When the temperature of the heat storage module is greater than the fifth temperature threshold, adjust the electric auxiliary heating operation mode to the shutdown operation.

[0023] Optionally, after adjusting the heat pump operation mode and the electric auxiliary heating operation mode according to the temperature of the heat storage module and controlling the heat pump water heater to generate hot water, it further includes:

[0024] When the heat pump operation mode is the full-load hot water generation mode and the temperature of the heat storage module is greater than the seventh temperature threshold, adjust the heat pump operation mode to the normal hot water generation mode, where the seventh temperature threshold is less than the first temperature threshold and greater than the fifth temperature threshold.

[0025] In addition, to achieve the above object, the present invention also proposes a heat pump water heater control device. The heat pump water heater control method is applied to a heat pump water heater, which includes a heat pump host, a hydraulic module, and a heat storage module. The heat pump host includes a compressor, a reversing device, an outdoor heat exchanger, an outdoor fan, and an expansion valve. The hydraulic module includes an electric auxiliary heating device, a water pump, and a water-fluorine heat exchanger. The heat pump host is connected to the hydraulic module through the water-fluorine heat exchanger. The heat storage module includes a first heat exchange water path and a second heat exchange water path. The heat storage module is connected to the hydraulic module through the first heat exchange water path, and the second heat exchange water path is connected to the user water pipeline. The first heat exchange water path is used for heat storage, and the second heat exchange water path is used for heat exchange with the first heat exchange water path;

[0026] The heat pump water heater control device includes:

[0027] A temperature detection module, configured to detect the temperature of the heat storage module when it detects that the heat storage module releases heat;

[0028] An operation adjustment module, configured to adjust the heat pump operation mode and the electric auxiliary heating operation mode according to the temperature of the heat storage module and control the heat pump water heater to generate hot water.

[0029] In addition, to achieve the above object, the present invention also proposes a heat pump water heater, which includes a memory, a processor, and a heat pump water heater control program stored on the memory and running on the processor. The heat pump water heater control program is configured to implement the heat pump water heater control method as described above.

[0030] In addition, to achieve the above object, the present invention further provides a storage medium, on which a heat pump water heater control program is stored. When the heat pump water heater control program is executed by a processor, the heat pump water heater control method described above is implemented.

[0031] When the present invention detects heat release of the heat storage module, it detects the temperature of the heat storage module; adjusts the heat pump operation mode and the electric auxiliary heat operation mode according to the temperature of the heat storage module, and controls the heat pump water heater to produce hot water. In this way, when it is detected that the user uses the hot water heated by the heat pump water heater, the temperature of the heat storage module is continuously detected, and then the operation modes of the heat pump and the electric auxiliary heat module are adjusted in real time according to the change of the temperature of the heat storage module, realizing the adjustment of the heating power and efficiency of the heat pump water heater according to the temperature of the heat storage module. By controlling different output states of the heat pump and the electric auxiliary heat in different stages, the heat storage module is quickly charged with less energy consumption, ensuring that the heat released and stored meets the demand for domestic water, thereby meeting the user's requirement for using hot water. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of a heat pump water heater in the hardware operating environment related to the embodiment solution of the present invention;

[0033] Figure 2 is a schematic flowchart of the first embodiment of the heat pump water heater control method of the present invention;

[0034] Figure 3 is a schematic structural diagram of a heat pump water heater in an embodiment of the heat pump water heater control method of the present invention;

[0035] Figure 4 is a schematic flowchart of the second embodiment of the heat pump water heater control method of the present invention;

[0036] Figure 5 is a schematic block diagram of the first embodiment of the heat pump water heater control device of the present invention.

[0037] DESCRIPTION OF REFERENCE NUMERALS:

[0038] Label Name Label Name 10 Heat pump main unit 17 Water-fluorine heat exchanger 20 Hydraulic module 21 Electric auxiliary heating device 30 Heat storage module 22 Flow switch 11 Gas-liquid separator 23 Water pump 12 Compressor 24 Expansion tank 13 Reversing device 25 First sensor 14 Outdoor heat exchanger 31 First heat exchange water path 15 Outdoor fan 32 Second heat exchange water path 16 Expansion valve 33 Second sensor

[0039] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] Refer to Figure 1 , Figure 1 is a schematic structural diagram of a heat pump water heater in the hardware operating environment related to the embodiment solution of the present invention.

[0042] As shown Figure 1 , the heat pump water heater may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard. Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0043] Those skilled in the art can understand that Figure 1 the structure shown in

[0044] does not constitute a limitation on the heat pump water heater, and may include more or fewer components than shown, or combine some components, or have different component arrangements. Figure 1 As shown

[0045] In Figure 1 the heat pump water heater shown, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the heat pump water heater of the present invention may be arranged in the heat pump water heater. The heat pump water heater calls the heat pump water heater control program stored in the memory 1005 through the processor 1001 and executes the heat pump water heater control method provided by the embodiments of the present invention.

[0046] The embodiments of the present invention provide a heat pump water heater control method. Referring to Figure 2 , Figure 2 is a schematic flowchart of the first embodiment of a heat pump water heater control method of the present invention.

[0047] In this embodiment, the heat pump water heater control method includes the following steps:

[0048] Step S10: When it is detected that the heat storage module releases heat, detect the temperature of the heat storage module.

[0049] In this embodiment, the execution subject of this embodiment may be the control device of the heat pump water heater. This heat pump water heater control device has functions such as data processing, data communication, and program operation. The heat pump water heater control device may be a controller inside the heat pump water heater. Of course, it may also be other devices with similar functions, and this embodiment does not limit this. For the convenience of description, this embodiment is described by taking the heat pump water heater control device as an example.

[0050] It should be noted that most of the heat pump water heaters on the market at present are storage-type, and the water in the water tank is heated by a heat pump system. The water stored in the water tank is in a "stagnant water" state. To overcome this drawback, a new phase change heat storage heat pump water heater has emerged on the market. The phase change heat storage material is filled into the gaps between the heat exchange tubes of the heat storage module of the heat pump water heater, and heat exchange is carried out between the hot water in the tube and the phase change heat storage material to complete the phase change energy storage of the phase change heat storage material. When using hot water, heat is released again to meet the user's demand for using hot water. However, during the energy storage process, it is generally achieved by controlling whether the outlet water temperature of the heat pump reaches the heat storage required temperature. When the capacities of the matching heat pump hosts are different, accurate control cannot be achieved.

[0051] To solve the above technical problems, in this embodiment, when it is detected that the user uses the hot water heated by the heat pump water heater, the temperature of the heat storage module is continuously detected, and then the operation modes of the heat pump and the electric auxiliary heating module are adjusted in real time according to the change of the temperature of the heat storage module, so as to realize the adjustment of the heating power and efficiency of the heat pump water heater according to the temperature of the heat storage module. In different stages, by controlling the different output states of the heat pump and the electric auxiliary heating, the heat storage module is quickly charged in a way with less energy consumption, ensuring that the heat of charging and discharging meets the demand for domestic water, so as to meet the user's requirement for using hot water.

[0052] It is worth noting that the heat pump water heater mentioned in this embodiment and the following embodiments refers to the Figure 3 phase change heat pump water heater as shown. The phase change heat pump water heater includes a heat pump host 10, a hydraulic module 20, and a heat storage module 30. The heat pump host 10 includes a gas-liquid separator 11, a compressor 12, a reversing device 13, an outdoor heat exchanger 14, an outdoor fan 15, and an expansion valve 16. The hydraulic module 20 includes an electric auxiliary heating device 21, a water flow switch 22, a water pump 23, an expansion tank 24, and a water-fluorine heat exchanger 17. The hydraulic module is also provided with a first sensor 25, and the heat storage module 30 is also provided with a second sensor 33. The first sensor 25 is used to collect the outlet water temperature, and the second sensor 33 is used to collect the temperature of the heat storage module. The heat pump host is connected to the hydraulic module through the water-fluorine heat exchanger 17.

[0053] Among them, the outdoor fan 15 is used to reduce the coil temperature of the outdoor heat exchanger 14, thereby accelerating the heat exchange between the heat exchanger and the external environment, and further achieving the control of the heating output capacity of the heat pump main unit 10. The greater the rotation speed of the outdoor fan 15, the greater the heating output of the heat pump main unit 10; the smaller the rotation speed of the outdoor fan 14, the smaller the heating output capacity of the heat pump main unit 10.

[0054] Among them, the heat storage module includes a first heat exchange water path 31 and a second heat exchange water path 32. The first heat exchange water path 31 and the second heat exchange water path 32 together form a heat storage module heat exchanger. The heat storage module is connected to the hydraulic module 20 through the first heat exchange water path 31. The second heat exchange water path 32 is connected to the user water pipeline. The first heat exchange water path 31 is used to store heat for the phase change material in the heat storage module, and the second heat exchange water path 32 is used to exchange heat with the first heat exchange water path through the phase change material.

[0055] During the operation of the heat pump main unit in the heat storage mode, the compressor 12 outputs high-temperature and high-pressure refrigerant to the commutation device 13. Through the selected terminal D-C of the commutation device 13, the high-temperature and high-pressure refrigerant exchanges heat through the water-fluorine heat exchanger 17. At this time, the water-fluorine heat exchanger 17 is used as an outdoor heat exchanger. After the refrigerant exchanges heat through the water-fluorine heat exchanger 17, it sequentially passes through the expansion valve 16, the outdoor heat exchanger 14, the selected terminal E-S of the commutation device 13, and the gas-liquid separator 11 and returns to the compressor. During this process, since the first side of the water-fluorine heat exchanger 17 is connected to the heat pump main unit and the second side is connected to the hydraulic module, when there is high-temperature and high-pressure refrigerant on the first side of the water-fluorine heat exchanger, due to the temperature difference between the two sides of the water-fluorine heat exchanger, the refrigerant on the first side will heat the water flowing through the second side of the water-fluorine heat exchanger, thereby realizing the heating of the water in the pipeline of the hydraulic module.

[0056] In the hydraulic module, water is sent to the water-fluorine heat exchanger 17 by a water pump, so that the water in the pipeline is heated through the water-fluorine heat exchanger 17, and then sequentially passes through the electric auxiliary heating device 21 and the water flow switch 22 and flows through the first heat exchange water path 31 of the heat storage module to realize heat exchange with the phase change material filled in the heat storage module, achieving the purpose of heat storage, and finally returning to the expansion tank 24 or the water pump 23 to participate in the next water-fluorine heat exchange.

[0057] In the heat storage module, tap water enters the second heat exchange pipeline 32 of the heat storage module through the one-way valve in the user water pipeline, and the second heat exchange pipeline 32 exchanges heat with the phase change material filled in the heat storage module to achieve the purpose of heating the user water.

[0058] In this embodiment, the heat pump main unit and the hydraulic module can be integrated into one module, that is, the hydraulic part is included in the heat pump main unit, or they can be separately and independently installed. The heat storage water tank can be a separate heat storage module, or the heat storage module and the hydraulic part can together form the heat storage water tank.

[0059] The heat storage module heat exchanger can be composed of a finned tube heat exchanger and a phase change material filled in its gaps. There are two water circuits in the finned tube heat exchanger. One is connected to the hydraulic module, and the hot water provided by the hydraulic module pipeline flows through the heat storage module heat exchanger or the coil of the heat storage module, exchanges heat with the phase change material, and realizes the heat charging and energy storage process of the heat storage module. The other is connected to the user's water pipeline. When the user uses hot water, tap water is supplemented. The external water body exchanges heat with the phase change material through the second heat exchange water circuit in the heat storage module heat exchanger, realizes the heat release of the phase change material, and reaches the process of raising the temperature of the user's water, meets the user's demand for using hot water, and can mix water through the bypass tap water branch to control the water outlet temperature and meet the user's demand for the water temperature of the used water.

[0060] It should be noted that in the solution of this embodiment, multiple temperature thresholds are involved, specifically A + a, A, B + b2, B + b1, B, C + c, C. The specific corresponding relationships are: the first temperature threshold is A, the second temperature threshold is A + a, the third temperature threshold is B, the fourth temperature threshold is C, the fifth temperature threshold is B + b1, the sixth temperature threshold is C + c, and the seventh temperature threshold is B + b2. The magnitude relationship is: A + a > A > B + b2 > B + b1 > B > C + c > C. A < the set temperature TSpcm of the heat storage water tank. Other parameters are: T4: ambient temperature; TSpcm: the set temperature of the heat storage water tank; Tpcm: the temperature of the heat storage water tank; Tpc: the temperature of the phase change material; a, b, c: the temperature hysteresis of the heat storage water tank, and a, b, c are arbitrarily preset temperature values.

[0061] It should be understood that first, it is necessary to determine whether the heat storage module releases heat. The specific judgment criterion can be to detect the user's use of hot water. It can be sensed that the heat storage module is releasing heat and confirm that the user is using hot water by detecting the temperature difference of the sensor for heat release, or the change in the heat storage amount, or the change in the temperature of the heat storage module, or the action of the water flow switch.

[0062] In the specific implementation, the temperature of the heat storage module is measured by Figure 3 the second sensor 33 therein. The detection of the temperature of the heat storage module here is the real-time data continuously detected during the heat release process of the heat storage module, that is, the data of the temperature of the water tank of the heat storage module changing with time, which is convenient for subsequently adjusting the heat pump operation mode and the electric auxiliary heat operation mode as the temperature of the heat storage module changes.

[0063] Step S20: Adjust the operation mode of the heat pump and the operation mode of the electric auxiliary heating according to the temperature of the heat storage module, and control the heat pump water heater to produce hot water.

[0064] It should be noted that the temperature threshold is determined according to the temperature of the heat storage module detected at different times, so as to adjust the operation mode of the heat pump and the operation mode of the electric auxiliary heating device in real time. Further, the operation mode of the heat pump can be off, start, normal hot water production mode and full-load hot water production mode. Among them, the normal hot water production mode is that the heat pump main unit outputs according to the preset energy consumption under normal settings, and the full-load hot water production mode is that the heat pump main unit outputs with the maximum capacity. Similarly, the operation mode of the electric auxiliary heating can be off, start, normal electric auxiliary heating mode and full-load electric auxiliary heating mode. Among them, the normal electric auxiliary heating mode is that the heat pump main unit outputs according to the preset energy consumption under normal settings, and the full-load hot water production mode is that the heat pump main unit outputs with the maximum capacity.

[0065] Further, in order to adjust the power of the electric auxiliary heating device in time to reduce energy consumption when the electric auxiliary heating function is not required to meet the heating demand, when the operation mode of the electric auxiliary heating is the full-load electric auxiliary heating mode, the temperature of the heat storage module is compared with the sixth temperature threshold. If the temperature of the heat storage module is greater than the fourth temperature threshold, it is determined that the electric auxiliary heating function does not need full-load output to meet the hot water production demand. At this time, the operation mode of the electric auxiliary heating is adjusted from the full-load electric auxiliary heating mode to the normal electric auxiliary heating mode.

[0066] It should be understood that when the operation mode of the electric auxiliary heating is the full-load electric auxiliary heating mode or the normal electric auxiliary heating mode, and the temperature of the heat storage module is greater than the fifth temperature threshold, the operation mode of the electric auxiliary heating is adjusted to the off operation, that is, the operation of the electric auxiliary heating device is stopped.

[0067] Further, in order to reduce energy consumption in time when the temperature of the heat storage module reaches the requirement and the heat pump main unit does not need to produce hot water, when the operation mode of the heat pump is the full-load hot water production mode, the temperature of the heat storage module is compared with the seventh temperature threshold. When the temperature of the heat storage module is greater than the seventh temperature threshold, the operation mode of the heat pump is adjusted from the full-load hot water production mode to the normal hot water production mode. If the temperature of the heat storage module is the second temperature threshold, it is determined that hot water production is not required at this time, and the hot water production function is turned off.

[0068] In this embodiment, when it is detected that the user uses the hot water produced by the heat pump water heater for heating, the temperature of the heat storage module is continuously detected, and then the operation modes of the heat pump and the electric auxiliary heating module are adjusted in real time according to the change of the temperature of the heat storage module, so as to realize the adjustment of the heating power and efficiency of the heat pump water heater according to the temperature of the heat storage module. By controlling different output states of the heat pump and the electric auxiliary heating at different stages, the heat storage module is quickly charged with less energy consumption, and the heat of charging and discharging is ensured to meet the demand of domestic water, so as to meet the user's requirement for using hot water.

[0069] Reference Figure 4 , Figure 4 is a schematic flowchart of the second embodiment of a control method for a heat pump water heater according to the present invention.

[0070] Based on the above first embodiment, the control method for the heat pump water heater in this embodiment includes, in the step S20:

[0071] Step S201: When the temperature of the heat storage module is lower than the first temperature threshold, determine whether the heat pump water heater meets the heat pump operation conditions.

[0072] It should be noted that first, the temperature of the heat storage module is compared with the first temperature threshold. When it is detected that the user is using hot water and the temperature Tpcm of the heat storage water tank is lower than the first threshold A, it enters the determination of whether it meets the operation conditions for the heat pump to produce hot water.

[0073] It should be understood that the heat pump operation conditions are pre-set conditions for starting the hot water production function, which can be whether the temperature of the heat storage module reaches the conditions, the difference from the ambient temperature, or the value range of the ambient temperature, etc. Specifically, the heat pump operation conditions include but are not limited to: 1. The temperature of the heat storage water tank of the heat pump and the target temperature of the hot water production demand do not exceed the preset operation temperature threshold, otherwise it may cause the pressure or current of the heat pump water heater to exceed the limit; 2. The ambient temperature is within the preset operation temperature range, so that the compressor can operate normally. Among them, the preset operation temperature threshold is any pre-set temperature threshold, and this embodiment does not limit it. The preset operation temperature range is also any pre-set temperature range, and this embodiment does not limit it. The heat pump operation conditions can also be other pre-set preconditions for the normal operation of the heat pump water heater. When all the heat pump operation conditions of the heat pump water heater are met at this time, it is determined that the heat pump operation conditions are met. If any one of the conditions is not met, the heat pump operation conditions are not met.

[0074] Furthermore, in order to adjust in time when the hot water production demand is high and the heat pump unit needs to increase the power, after determining whether the heat pump operation conditions are met, if the temperature of the heat storage module is less than the third temperature threshold and the heat pump operation conditions are met at the same time, the heat pump operation mode is directly adjusted to the full-load hot water production mode, so as to meet the demand for quickly preparing hot water.

[0075] Step S202: When the heat pump water heater meets the heat pump operation conditions, adjust the heat pump operation mode to the normal hot water production mode, and exit the normal hot water production mode when the temperature of the heat storage module is greater than the second temperature threshold, and the second temperature threshold is greater than the first temperature threshold.

[0076] In a specific implementation, when it is determined that the heat pump water heater meets the heat pump operation conditions, first adjust the heat pump operation mode to the normal hot water production mode, that is, normally start the heat pump main unit to produce hot water. Then, when the temperature of the heat storage module is heated to be greater than the second temperature threshold, it is determined that the hot water demand of the user is met. At this time, exit the normal hot water production mode and turn off the hot water production function.

[0077] Step S203: When the heat pump water heater does not meet the heat pump operation conditions and the temperature of the heat storage module is less than the third temperature threshold, adjust the electric auxiliary heating operation mode to the normal electric auxiliary heating mode, where the third temperature threshold is less than the first temperature threshold.

[0078] It should be noted that when the heat pump water heater does not meet the heat pump operation conditions, then compare the temperature of the heat storage module with the third temperature threshold. If the temperature of the heat storage module is less than the third temperature threshold, start the electric auxiliary heating device and adjust it to the normal electric auxiliary heating mode.

[0079] Furthermore, in order to further adjust the heat pump operation mode and the electric auxiliary heating operation mode according to the temperature change of the heat storage module after starting the electric auxiliary heating function, after adjusting the electric auxiliary heating operation mode to the normal electric auxiliary heating mode, compare the temperature of the heat storage module with the fourth temperature threshold again. When the temperature of the heat storage module is less than the fourth temperature threshold, it is determined that the hot water production capacity needs to be increased. At this time, adjust the electric auxiliary heating operation mode to the full-load electric auxiliary heating mode to increase the hot water production capacity.

[0080] It should be understood that if the temperature of the heat storage module is less than the fourth temperature threshold and the heat pump water heater meets the heat pump operation conditions at the same time, then adjust the heat pump operation mode to the full-load hot water production mode, that is, switch both the heat pump and the electric auxiliary heating device to the maximum capacity to meet a greater hot water production demand. At this time, the latent heat of the phase change material in the heat storage water tank has been released, and the heat storage capacity of the heat storage water tank is insufficient and urgently needs to be replenished with heat. Therefore, perform the maximum heat charging output operation to meet the heat charging and discharging requirements and thus meet the user's hot water usage requirements.

[0081] Furthermore, in order to directly turn off the electric auxiliary heating operation mode when the electric auxiliary heating device is not required for heating, after adjusting the electric auxiliary heating operation mode to the normal electric auxiliary heating mode, compare the temperature of the heat storage module with the fifth temperature threshold again. If the temperature of the heat storage module is greater than the fifth temperature threshold, turn off the electric auxiliary heating device to reduce the energy consumption of the heat pump water heater.

[0082] In this embodiment, by judging the value range of the temperature of the heat storage module and whether the heat pump water heater meets the heat pump operation conditions, the operation states of the heat pump and the electric auxiliary heating device are adjusted in real time to prevent insufficient hot water production capacity or wasted extra energy consumption caused by untimely adjustment.

[0083] In addition, an embodiment of the present invention further provides a storage medium, on which a heat pump water heater control program is stored. When the heat pump water heater control program is executed by a processor, the steps of the heat pump water heater control method described above are implemented.

[0084] Since this storage medium adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated herein one by one.

[0085] Refer to Figure 5 , Figure 5 which is a structural block diagram of the first embodiment of the heat pump water heater control device of the present invention.

[0086] As Figure 5 shown, the heat pump water heater control device proposed by the embodiment of the present invention includes:

[0087] A temperature detection module 10, configured to detect the temperature of the heat storage module when it is detected that the heat storage module releases heat.

[0088] In this embodiment, the execution subject of this embodiment may be the heat pump water heater control device, which has functions such as data processing, data communication, and program operation. The heat pump water heater control device may be a controller inside the heat pump water heater. Of course, it may also be other devices with similar functions, and this embodiment condition does not limit this. For the convenience of description, this embodiment is described by taking the heat pump water heater control device as an example.

[0089] It should be noted that most of the heat pump water heaters on the market at present are storage type, and the water in the water tank is heated by a heat pump system. The water stored in the water tank is in a "stagnant water" state. In order to overcome this drawback, a new phase change heat storage type heat pump water heater has emerged on the market. The phase change heat storage material is filled into the gaps between the heat exchange tubes of the heat storage module of the heat pump water heater, and heat exchange is carried out between the hot water in the tube and the phase change heat storage material to complete the phase change energy storage of the phase change heat storage material. When using hot water, heat is released again to meet the user's demand for hot water. However, during the energy storage process, it is generally achieved by controlling whether the outlet water temperature of the heat pump reaches the heat storage required temperature. When the capacities of the matched heat pump hosts are different, accurate control cannot be achieved.

[0090] To solve the above technical problems, in this embodiment, when it is detected that the user is using the hot water heated by the heat pump water heater, the temperature of the heat storage module is continuously detected, and then the operation modes of the heat pump and the electric auxiliary heating module are adjusted in real time according to the change of the temperature of the heat storage module, so as to realize the adjustment of the heating power and efficiency of the heat pump water heater according to the temperature of the heat storage module. By controlling the different output states of the heat pump and the electric auxiliary heating at different stages, the heat storage module is quickly heated with less energy consumption, ensuring that the heat of charging and discharging meets the demand of domestic water, so as to meet the requirements of users for using hot water.

[0091] It should be noted that the heat pump water heater mentioned in this embodiment and the following embodiments refers to the phase change heat pump water heater as Figure 3 shown. The phase change heat pump water heater includes a heat pump main unit 10, a hydraulic module 20 and a heat storage module 30. The heat pump main unit 10 includes a gas-liquid separator 11, a compressor 12, a reversing device 13, an outdoor heat exchanger 14, an outdoor fan 15 and an expansion valve 16. The hydraulic module 20 includes an electric auxiliary heating device 21, a water flow switch 22, a water pump 23, an expansion tank 24 and a water-fluorine heat exchanger 17. The hydraulic module is also provided with a first sensor 25, and the heat storage module 30 is also provided with a second sensor 33. The first sensor 25 is used to collect the outlet water temperature, and the second sensor 33 is used to collect the temperature of the heat storage module. The heat pump main unit is connected to the hydraulic module through the water-fluorine heat exchanger 17.

[0092] Among them, the outdoor fan 15 is used to reduce the coil temperature of the outdoor heat exchanger 14, so as to accelerate the heat exchange between the heat exchanger and the external environment, and further control the heating output capacity of the heat pump main unit 10. The greater the rotation speed of the outdoor fan 15, the greater the heating output of the heat pump main unit 10, and the smaller the rotation speed of the outdoor fan 14, the smaller the heating output capacity of the heat pump main unit 10.

[0093] Among them, the heat storage module includes a first heat exchange water path 31 and a second heat exchange water path 32. The first heat exchange water path 31 and the second heat exchange water path 32 together form a heat storage module heat exchanger. The heat storage module is connected to the hydraulic module 20 through the first heat exchange water path 31. The second heat exchange water path 32 is connected to the user's water use pipeline. The first heat exchange water path 31 is used to store heat for the phase change material in the heat storage module, and the second heat exchange water path 32 is used to exchange heat with the first heat exchange water path through the phase change material.

[0094] During the operation of the heat pump main unit in the heat storage mode, the compressor 12 outputs high-temperature and high-pressure refrigerant to the commutation device 13. Through the selected terminal D-C of the commutation device 13, the high-temperature and high-pressure refrigerant exchanges heat through the water-fluorine heat exchanger 17. At this time, the water-fluorine heat exchanger 17 is used as the outdoor heat exchanger. After the refrigerant exchanges heat through the water-fluorine heat exchanger 17, it sequentially passes through the expansion valve 16, the outdoor heat exchanger 14, the selected terminal E-S of the commutation device 13, and the gas-liquid separator 11 and then returns to the compressor. During this process, since the first side of the water-fluorine heat exchanger 17 is connected to the heat pump main unit and the second side is connected to the hydraulic module, when there is high-temperature and high-pressure refrigerant on the first side of the water-fluorine heat exchanger, due to the temperature difference between the two sides of the water-fluorine heat exchanger, the refrigerant on the first side will heat the water flowing through the second side of the water-fluorine heat exchanger, thereby realizing the heating of the water in the pipeline of the hydraulic module.

[0095] In the hydraulic module, water is sent to the water-fluorine heat exchanger 17 by a water pump, so that the water in the pipeline is heated through the water-fluorine heat exchanger 17, and then sequentially passes through the electric auxiliary heating device 21 and the water flow switch 22 and flows through the first heat exchange water path 31 of the heat storage module, realizing heat exchange with the phase change material filled in the heat storage module to achieve the purpose of heat storage, and finally returns to the expansion tank 24 or the water pump 23 to participate in the next water-fluorine heat exchange.

[0096] In the heat storage module, tap water enters the second heat exchange pipeline 32 of the heat storage module through the one-way valve in the user water pipeline. The second heat exchange pipeline 32 exchanges heat with the phase change material filled in the heat storage module to achieve the purpose of heating the user's water.

[0097] In this embodiment, the heat pump main unit and the hydraulic module can be integrated into one module, that is, the hydraulic part is included in the heat pump main unit, or they can be installed separately and independently. The heat storage water tank can be a separate heat storage module, or the heat storage module and the hydraulic part can together form the heat storage water tank.

[0098] The heat storage module heat exchanger can be composed of a finned tube heat exchanger and the phase change material filled in its gaps. The finned tube heat exchanger has two water paths. One is connected to the hydraulic module, and the hot water provided by the hydraulic module pipeline flows through the heat storage module heat exchanger or the coil of the heat storage module to exchange heat with the phase change material, realizing the heat charging and energy storage process of the heat storage module. The other is connected to the user water pipeline. When the user uses hot water, tap water is supplemented. The external water body exchanges heat with the phase change material through the second heat exchange water path in the heat storage module heat exchanger, realizing the heat release of the phase change material, achieving the process of heating the user's water, meeting the user's demand for using hot water, and can mix water through the bypass tap water branch to control the water outlet temperature and meet the user's demand for the water temperature of the used water.

[0099] It should be noted that in the solution of this embodiment, multiple temperature thresholds are involved, specifically A + a, A, B + b2, B + b1, B, C + c, C. The specific corresponding relationships are as follows: the first temperature threshold is A, the second temperature threshold is A + a, the third temperature threshold is B, the fourth temperature threshold is C, the fifth temperature threshold is B + b1, the sixth temperature threshold is C + c, and the seventh temperature threshold is B + b2. The magnitude relationship is: A + a > A > B + b2 > B + b1 > B > C + c > C. A < the set temperature TSpcm of the heat storage water tank. Other parameters are: T4: ambient temperature; TSpcm: the set temperature of the heat storage water tank; Tpcm: the temperature of the heat storage water tank; Tpc: the temperature of the phase change material; a, b, c: the temperature hysteresis of the heat storage water tank, and a, b, c are arbitrary preset temperature values.

[0100] It should be understood that first, it is necessary to determine whether the heat storage module is discharging heat. The specific judgment criterion can be to detect the user's use of hot water. It can be sensed that the heat storage module is discharging heat by detecting the temperature difference of the sensor for heat release, or the change in heat storage amount, or the change in the temperature of the heat storage module, or the action of the water flow switch, so as to confirm that the user is using hot water.

[0101] In the specific implementation, the temperature of the heat storage module is measured by Figure 3 the second sensor 33 therein. The detected temperature of the heat storage module here is the real-time data continuously detected during the heat release process of the heat storage module, that is, the data of the temperature of the water tank of the heat storage module changing with time, which is convenient for subsequently adjusting the heat pump operation mode and the electric auxiliary heat operation mode as the temperature of the heat storage module changes.

[0102] The operation adjustment module 20 is used to adjust the heat pump operation mode and the electric auxiliary heat operation mode according to the temperature of the heat storage module, and control the heat pump water heater to produce hot water.

[0103] It should be noted that the temperature threshold is determined according to the temperature of the heat storage module detected at different times, so as to adjust the heat pump operation mode and the operation mode of the electric auxiliary heat device in real time. Further, the heat pump operation mode can be off, start, normal hot water production mode, and full-load hot water production mode. Among them, the normal hot water production mode is that the heat pump main unit outputs according to the preset energy consumption under normal settings, while the full-load hot water production mode is that the heat pump main unit outputs with the maximum capacity. Similarly, the electric auxiliary heat operation mode can be off, start, normal electric auxiliary heat mode, and full-load electric auxiliary heat mode. Among them, the normal electric auxiliary heat mode is that the heat pump main unit outputs according to the preset energy consumption under normal settings, while the full-load hot water production mode is that the heat pump main unit outputs with the maximum capacity.

[0104] Further, in order to timely adjust the power of the electric auxiliary heating device to reduce energy consumption when the heating demand can be met without the electric auxiliary heating function, when the electric auxiliary heating operation mode is the full-load electric auxiliary heating mode, the temperature of the heat storage module is compared with the sixth temperature threshold. If the temperature of the heat storage module is greater than the fourth temperature threshold, it is determined that the electric auxiliary heating function does not need to output at full load to meet the hot water heating demand. At this time, the electric auxiliary heating operation mode is adjusted from the full-load electric auxiliary heating mode to the normal electric auxiliary heating mode.

[0105] It should be understood that when the electric auxiliary heating operation mode is the full-load electric auxiliary heating mode or the normal electric auxiliary heating mode, when the temperature of the heat storage module is greater than the fifth temperature threshold, the electric auxiliary heating operation mode is adjusted to the shutdown operation, that is, the operation of the electric auxiliary heating device is stopped.

[0106] Further, in order to timely reduce energy consumption when the temperature of the heat storage module reaches the requirement and the heat pump host does not need to heat hot water, when the heat pump operation mode is the full-load hot water heating mode, the temperature of the heat storage module is compared with the seventh temperature threshold. When the temperature of the heat storage module is greater than the seventh temperature threshold, the heat pump operation mode is adjusted from the full-load hot water heating mode to the normal hot water heating mode. If the temperature of the heat storage module is the second temperature threshold, it is determined that hot water heating is not required at this time, and the hot water heating function is turned off.

[0107] In this embodiment, when it is detected that the user uses the hot water heated by the heat pump water heater, the temperature of the heat storage module is continuously detected, and then the operation modes of the heat pump and the electric auxiliary heating module are adjusted in real time according to the change of the temperature of the heat storage module, realizing the adjustment of the heating power and efficiency of the heat pump water heater according to the temperature of the heat storage module. In different stages, by controlling different output states of the heat pump and the electric auxiliary heating, the heat storage module is quickly charged with less energy consumption, ensuring that the heat of heat charging and discharging meets the domestic water demand, so as to meet the user's requirement for using hot water.

[0108] In one embodiment, the operation adjustment module 20 is further configured to determine whether the heat pump water heater meets the heat pump operation condition when the temperature of the heat storage module is lower than the first temperature threshold; when the heat pump water heater meets the heat pump operation condition, adjust the heat pump operation mode to the normal hot water heating mode, and exit the normal hot water heating mode when the temperature of the heat storage module is greater than the second temperature threshold, where the second temperature threshold is greater than the first temperature threshold; when the heat pump water heater does not meet the heat pump operation condition and the temperature of the heat storage module is less than the third temperature threshold, adjust the electric auxiliary heating operation mode to the normal electric auxiliary heating mode, where the third temperature threshold is less than the first temperature threshold.

[0109] In one embodiment, the operation adjustment module 20 is further configured to adjust the heat pump operation mode to the full-load hot water heating mode with the maximum capacity operation when the temperature of the heat storage module is less than the third temperature threshold and the heat pump water heater meets the heat pump operation condition.

[0110] In one embodiment, the operation adjustment module 20 is further configured to, when the temperature of the heat storage module is less than a fourth temperature threshold, adjust the electric auxiliary heating operation mode to a full-load electric auxiliary heating mode with maximum output, and determine whether the heat pump water heater meets the heat pump operation conditions. The fourth temperature threshold is less than the third temperature threshold, and the fourth temperature threshold is less than the phase change material temperature of the heat storage module; when the heat pump water heater meets the heat pump operation conditions, adjust the heat pump operation mode to a full-load hot water production mode.

[0111] In one embodiment, the operation adjustment module 20 is further configured to, when the temperature of the heat storage module is greater than a fifth temperature threshold, adjust the electric auxiliary heating operation mode to a shutdown operation. The fifth temperature threshold is greater than the third temperature threshold and less than the first temperature threshold.

[0112] In one embodiment, the operation adjustment module 20 is further configured to, when the electric auxiliary heating operation mode is the full-load electric auxiliary heating mode and the temperature of the heat storage module is greater than a sixth temperature threshold, adjust the electric auxiliary heating operation mode to a normal electric auxiliary heating mode. The sixth temperature threshold is greater than the fourth temperature threshold and less than the third temperature threshold; when the temperature of the heat storage module is greater than the fifth temperature threshold, adjust the electric auxiliary heating operation mode to a shutdown operation.

[0113] In one embodiment, the operation adjustment module 20 is further configured to, when the heat pump operation mode is the full-load hot water production mode and the temperature of the heat storage module is greater than a seventh temperature threshold, adjust the heat pump operation mode to a normal hot water production mode. The seventh temperature threshold is less than the first temperature threshold and greater than the fifth temperature threshold.

[0114] It should be understood that the above is only an example for illustration and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not limit this.

[0115] It should be noted that the above-described work process is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the solution of this embodiment, and there is no limitation here.

[0116] In addition, for the technical details not described in detail in this embodiment, reference can be made to the heat pump water heater control method provided in any embodiment of the present invention, which will not be elaborated here.

[0117] In addition, it should be noted that in this text, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or system including such element.

[0118] The serial numbers of the above embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.

[0119] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as Read Only Memory (ROM) / RAM, magnetic disk, optical disc), and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0120] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the accompanying drawings, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A control method for a heat pump water heater, characterized in that, The control method of the heat pump water heater is applied to a heat pump water heater, which includes a heat pump main unit, a hydraulic module, and a heat storage module. The heat pump main unit includes a compressor, a reversing device, an outdoor heat exchanger, an outdoor fan, and an expansion valve. The hydraulic module includes an electric auxiliary heating device, a water pump, and a water-fluorine heat exchanger. The heat pump main unit is connected to the hydraulic module through the water-fluorine heat exchanger. The heat storage module includes a first heat exchange water circuit and a second heat exchange water circuit. The heat storage module is connected to the hydraulic module through the first heat exchange water circuit. The second heat exchange water circuit is connected to the user's water pipeline. The first heat exchange water circuit is used for heat storage, and the second heat exchange water circuit is used for heat exchange with the first heat exchange water circuit; The control method of the heat pump water heater includes: When it is detected that the heat storage module releases heat, detect the temperature of the heat storage module; Adjust the heat pump operation mode and the electric auxiliary heating operation mode according to the temperature of the heat storage module, and control the heat pump water heater to produce hot water.

2. The control method of the heat pump water heater according to claim 1, wherein, The adjusting the heat pump operation mode and the electric auxiliary heating operation mode according to the temperature of the heat storage module includes: When the temperature of the heat storage module is lower than the first temperature threshold, determine whether the heat pump water heater meets the heat pump operation conditions; When the heat pump water heater meets the heat pump operation conditions, adjust the heat pump operation mode to the normal hot water production mode, and exit the normal hot water production mode when the temperature of the heat storage module is greater than the second temperature threshold, and the second temperature threshold is greater than the first temperature threshold; When the heat pump water heater does not meet the heat pump operation conditions and the temperature of the heat storage module is less than the third temperature threshold, adjust the electric auxiliary heating operation mode to the normal electric auxiliary heating mode, and the third temperature threshold is less than the first temperature threshold.

3. The control method of the heat pump water heater according to claim 2, wherein After determining whether the heat pump water heater meets the heat pump operation conditions when the temperature of the heat storage module is lower than the first temperature threshold, it further includes: When the temperature of the heat storage module is less than the third temperature threshold and the heat pump water heater meets the heat pump operation conditions, adjust the heat pump operation mode to the full-load hot water production mode with maximum capacity operation.

4. The control method of the heat pump water heater according to claim 2, wherein, After adjusting the electric auxiliary heating operation mode to the normal electric auxiliary heating mode when the heat pump water heater does not meet the heat pump operation conditions and the temperature of the heat storage module is less than the third temperature threshold, it further includes: When the temperature of the heat storage module is less than the fourth temperature threshold, adjust the electric auxiliary heating operation mode to the full-load electric auxiliary heating mode with maximum output operation, and judge whether the heat pump water heater meets the heat pump operation conditions. The fourth temperature threshold is less than the third temperature threshold, and the fourth temperature threshold is less than the phase change material temperature of the heat storage module; When the heat pump water heater meets the heat pump operation conditions, adjust the heat pump operation mode to the full-load hot water production mode.

5. The control method of the heat pump water heater according to claim 2, wherein After adjusting the electric auxiliary heating operation mode to the normal electric auxiliary heating mode when the heat pump water heater does not meet the heat pump operation conditions and the temperature of the heat storage module is less than the third temperature threshold, it further includes: When the temperature of the heat storage module is greater than the fifth temperature threshold, adjust the electric auxiliary heating operation mode to the shutdown operation. The fifth temperature threshold is greater than the third temperature threshold and less than the first temperature threshold.

6. The control method of the heat pump water heater according to any one of claims 1-5, characterized in that, After adjusting the operation mode of the heat pump and the operation mode of the electric auxiliary heating according to the temperature of the heat storage module and controlling the heat pump water heater to produce hot water, it further includes: When the electric auxiliary heating operation mode is the full-load electric auxiliary heating mode and the temperature of the heat storage module is greater than the sixth temperature threshold, adjusting the electric auxiliary heating operation mode to the normal electric auxiliary heating mode, where the sixth temperature threshold is greater than the fourth temperature threshold and less than the third temperature threshold; When the temperature of the heat storage module is greater than the fifth temperature threshold, adjusting the electric auxiliary heating operation mode to the off operation.

7. The control method of the heat pump water heater according to any one of claims 1-5, characterized in that, After adjusting the operation mode of the heat pump and the operation mode of the electric auxiliary heating according to the temperature of the heat storage module and controlling the heat pump water heater to produce hot water, it further includes: When the heat pump operation mode is the full-load hot water production mode and the temperature of the heat storage module is greater than the seventh temperature threshold, adjusting the heat pump operation mode to the normal hot water production mode, where the seventh temperature threshold is less than the first temperature threshold and greater than the fifth temperature threshold.

8. A control device for a heat pump water heater, characterized in that, The heat pump water heater control method is applied to a heat pump water heater, which includes a heat pump main unit, a hydraulic module, and a heat storage module. The heat pump main unit includes a compressor, a reversing device, an outdoor heat exchanger, an outdoor fan, and an expansion valve. The hydraulic module includes an electric auxiliary heating device, a water pump, and a water-fluorine heat exchanger. The heat pump main unit is connected to the hydraulic module through the water-fluorine heat exchanger. The heat storage module includes a first heat exchange water circuit and a second heat exchange water circuit. The heat storage module is connected to the hydraulic module through the first heat exchange water circuit. The second heat exchange water circuit is connected to the user's water pipeline. The first heat exchange water circuit is used for heat storage, and the second heat exchange water circuit is used for heat exchange with the first heat exchange water circuit; The heat pump water heater control device includes: A temperature detection module, configured to detect the temperature of the heat storage module when it detects that the heat storage module releases heat; An operation adjustment module, configured to adjust the operation mode of the heat pump and the operation mode of the electric auxiliary heating according to the temperature of the heat storage module and control the heat pump water heater to produce hot water.

9. A heat pump water heater, characterized in that, The heat pump water heater includes a memory, a processor, and a heat pump water heater control program stored on the memory and running on the processor. The heat pump water heater control program is configured to implement the heat pump water heater control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that, The heat pump water heater control program is stored on a storage medium. When the heat pump water heater control program is executed by a processor, it implements the heat pump water heater control method according to any one of claims 1 to 7.

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