Heat pump water system, control method thereof, controller and computer readable storage medium

Abstract

The embodiment of the invention provides a heat pump water system and a control method thereof, a controller and a computer readable storage medium, the heat pump water system comprises indoor heat exchange equipment, a heat pump device, auxiliary heat exchange equipment and a valve assembly, the heat pump device is communicated with a water inlet of the indoor heat exchange equipment through a first water supply pipeline, and the auxiliary heat exchange equipment is communicated with a water outlet of the heat pump device through a second water supply pipeline; the first water return pipeline is communicated with a water outlet of the indoor heat exchange equipment; the auxiliary heat exchange equipment is communicated to the first water supply pipeline through a second water return pipeline and a second water supply pipeline; the valve assembly is arranged on the second water return pipeline and / or the second water supply pipeline and used for adjusting the flow of water flowing from the second water return pipeline to the second water supply pipeline through the auxiliary heat exchange equipment. According to the heat pump water system, the water flow flowing to the auxiliary heat exchange equipment can be adjusted by controlling the valve assembly according to the series complementary structure of the heat pump device and the auxiliary heat exchange equipment, the problem that the effect of an independent heat pump device is poor is solved, and therefore the heating effect of the heat pump water system is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, and in particular to a heat pump water system and its control method, controller and computer-readable storage medium. Background Technology

[0002] Currently, existing air source heat pumps heat indoor spaces by absorbing heat from outdoor air, compressing, transferring, and releasing that heat. However, under extreme temperature conditions, existing standalone air source heat pumps struggle to maintain a constant indoor temperature, resulting in poor heating performance. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a heat pump water system and its control method, controller, and computer-readable storage medium, aiming to improve the poor performance of individual heat pump devices and enhance the heating effect of the heat pump water system.

[0004] In a first aspect, embodiments of this application provide a heat pump water system, comprising: an indoor heat exchange device; a heat pump unit connected to the inlet of the indoor heat exchange device via a first water supply pipeline and connected to the outlet of the indoor heat exchange device via a first return water pipeline; an auxiliary heat exchange device connected to the first water supply pipeline via a second return water pipeline and a second water supply pipeline; and a valve assembly disposed on the second return water pipeline and / or the second water supply pipeline, the valve assembly being used to regulate the water flow rate from the second return water pipeline through the auxiliary heat exchange device to the second water supply pipeline.

[0005] According to some embodiments of this application, the second return water pipeline and the first water supply pipeline intersect at a first common end, the second water supply pipeline and the first water supply pipeline intersect at a second common end, the valve assembly is also disposed on the first water supply pipeline, and the valve assembly is also used to regulate the water flow from the first common end to the second common end.

[0006] According to some embodiments of this application, the valve assembly includes a three-way valve, which is provided with an inflow channel, a first outflow channel and a second outflow channel. The inflow channel is connected to the heat pump device, the first outflow channel is connected to the auxiliary heat exchange device through the second return water pipeline, and the second outflow channel is connected to the indoor heat exchange device.

[0007] According to some embodiments of this application, the valve assembly includes a first two-way valve and a second two-way valve. The first two-way valve is disposed in the second return water pipeline or the second supply water pipeline, and the second two-way valve is disposed in the first supply water pipeline between the first common end and the second common end.

[0008] According to some embodiments of this application, the indoor heat exchange equipment includes at least one of the following: fan coil unit, radiant panel, and underfloor heating.

[0009] According to some embodiments of this application, the heat pump device is provided with a water-fluorine heat exchanger, a water pump and a heat pump pipeline. The water-fluorine heat exchanger and the water pump are both located in the heat pump pipeline. One end of the heat pump pipeline is connected to the first water supply pipeline and the other end is connected to the first return water pipeline.

[0010] According to some embodiments of this application, the heat pump water system further includes a buffer water tank, a water supply valve, and an inlet pipe. The buffer water tank is disposed in the first return water pipeline, the inlet pipe is connected to the buffer water tank, and the water supply valve is disposed in the inlet pipe.

[0011] Secondly, embodiments of this application also provide a control method for a heat pump water system, applied to the heat pump water system as described in the first aspect. The control method includes: receiving a valve switching command; switching and controlling the valve assembly according to the valve switching command to increase the water flow from the second return water pipeline through the auxiliary heat exchange device to the second supply water pipeline, and controlling the auxiliary heat exchange device to produce hot water.

[0012] According to some embodiments of this application, the second return water pipeline and the first water supply pipeline intersect at a first common end, the second water supply pipeline and the first water supply pipeline intersect at a second common end, and the valve assembly is also disposed on the first water supply pipeline; the control method further includes: switching the valve assembly according to the valve switching command to reduce the water flow from the first common end to the second common end.

[0013] According to some embodiments of this application, the valve switching command is generated through at least one of the following steps: acquiring the outdoor temperature, and generating the valve switching command when the outdoor temperature is less than or equal to the outdoor set temperature; acquiring the water supply temperature of the indoor heat exchanger, and generating the valve switching command when the water supply temperature is less than the set water supply temperature; acquiring the indoor temperature, and generating the valve switching command when the indoor temperature is less than or equal to the indoor set temperature; acquiring the current power of the heat pump device, and generating the valve switching command when the current power is greater than or equal to the preset maximum power.

[0014] According to some embodiments of this application, the valve assembly includes a three-way valve, which has an inflow channel, a first outflow channel, and a second outflow channel. The inflow channel is connected to the heat pump device, the first outflow channel is connected to the auxiliary heat exchange device through a second return water pipe, and the second outflow channel is connected to the indoor heat exchange device. Switching the valve assembly includes one of the following: when the three-way valve is an on / off valve, controlling the inflow channel to be connected to the first outflow channel and controlling the inflow channel to be closed to the second outflow channel; when the three-way valve is a proportional valve, increasing the valve opening between the inflow channel and the first outflow channel and decreasing the valve opening between the inflow channel and the second outflow channel.

[0015] According to some embodiments of this application, the control method further includes one of the following: when the three-way valve is an on / off valve, the set water supply temperature is used as the set water outlet temperature of the auxiliary heat exchanger; when the three-way valve is a proportional valve, the set water outlet temperature of the auxiliary heat exchanger is determined according to the set water supply temperature and the water supply temperature.

[0016] According to some embodiments of this application, the valve assembly includes a first two-way valve and a second two-way valve. The first two-way valve is disposed in the second return water pipeline or the second supply water pipeline, and the second two-way valve is disposed in the first supply water pipeline between the first common end and the second common end. Switching the valve assembly includes: increasing the valve opening of the first two-way valve and decreasing the valve opening of the second two-way valve.

[0017] According to some embodiments of this application, after switching the valve assembly, the control method further includes: when the water supply temperature is greater than or equal to the set water supply temperature and the indoor temperature is greater than the set indoor temperature, controlling the auxiliary heat exchange equipment to stop producing hot water and controlling the heat pump device to operate, and controlling the valve assembly to reduce the water flow from the second return water pipe through the auxiliary heat exchange equipment to the second water supply pipe, and increasing the water flow from the first common end to the second common end.

[0018] Thirdly, embodiments of this application provide a controller, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method of the heat pump water system as described in the second aspect above when running the computer program.

[0019] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for performing the control method of the heat pump water system as described in the second aspect above.

[0020] According to the technical solution of the embodiments of this application, at least the following beneficial effects are achieved: The embodiments of this application include an indoor heat exchange device, a heat pump device, an auxiliary heat exchange device, and a valve assembly. The heat pump device is connected to the inlet of the indoor heat exchange device via a first water supply pipeline and to the outlet of the indoor heat exchange device via a first return water pipeline. The auxiliary heat exchange device is connected to the first water supply pipeline via a second return water pipeline and a second water supply pipeline. The valve assembly is disposed on the first water supply pipeline and connected to the auxiliary heat exchange device, and is used to regulate the water flow from the first water supply pipeline to the auxiliary heat exchange device. The embodiments of this application, based on the complementary series connection of the heat pump device and the auxiliary heat exchange device, can regulate the water flow to the auxiliary heat exchange device by controlling the valve assembly, thus solving the problem of poor performance of a standalone heat pump device and improving the heating effect of the heat pump water system.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0023] Figure 1 This is a schematic diagram of the structure of a heat pump water system provided in one embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of a heat pump water system provided in another embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure of a heat pump water system provided in another embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the structure of a heat pump device in a heat pump water system provided in one embodiment of this application;

[0027] Figure 5 This is a flowchart of a control method for a heat pump water system provided in one embodiment of this application;

[0028] Figure 6 This is an overall flowchart of a control method for a heat pump water system provided in one embodiment of this application;

[0029] Figure 7 This is an overall flowchart of a control method for a heat pump water system provided in another embodiment of this application;

[0030] Figure 8This is a schematic diagram of a controller for performing a control method for a heat pump water system according to an embodiment of this application. Detailed Implementation

[0031] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0032] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0035] In some cases, existing air source heat pumps heat the room by absorbing heat from the outdoor air, compressing, transferring, and releasing that heat. However, under extreme temperature conditions, existing standalone air source heat pumps struggle to maintain a constant indoor temperature, resulting in poor heating performance.

[0036] Based on the above, this application proposes a heat pump water system and its control method, controller and computer-readable storage medium, aiming to improve the poor performance of individual heat pump devices and enhance the heating effect of the heat pump water system.

[0037] The various embodiments of the heat pump water system of this application will be further described below with reference to the accompanying drawings.

[0038] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a heat pump water system provided in one embodiment of this application.

[0039] In one embodiment, the heat pump water system of this application includes, but is not limited to, an indoor heat exchange device 100, a heat pump unit 200, an auxiliary heat exchange device 300, and a valve assembly 400. The heat pump unit 200 is connected to the inlet of the indoor heat exchange device 100 through a first water supply pipe and to the outlet of the indoor heat exchange device 100 through a first return water pipe. The auxiliary heat exchange device 300 is connected to the first water supply pipe through a second return water pipe and a second water supply pipe. The valve assembly 400 is disposed in the second return water pipe and / or the second water supply pipe, wherein the valve assembly 400 is used to regulate the water flow rate from the second return water pipe through the auxiliary heat exchange device 300 to the second water supply pipe.

[0040] It should be noted that, since the embodiments of this application can adjust the water flow from the second return water pipe through the auxiliary heat exchange device 300 to the second supply water pipe by controlling the valve assembly 400 based on the complementary structure of the heat pump device 200 and the auxiliary heat exchange device 300 in series, the problem of poor performance of the heat pump device 200 alone can be solved, thereby improving the heating effect of the heat pump water system.

[0041] It should be noted that when the water flow from the first water supply pipe to the auxiliary heat exchanger 300 through the second return pipe increases, the auxiliary heat exchanger 300 starts to produce hot water, which can solve the problem of poor performance of the standalone heat pump device 200 and thus improve the heating effect of the heat pump water system.

[0042] Specifically, the common end where the second return water pipe intersects with the first water supply pipe is called the first common end, and the common end where the second water supply pipe intersects with the first water supply pipe is called the second common end. The valve assembly 400 is also installed in the first water supply pipe. Through the valve assembly 400, the water flow from the first common end to the second common end can also be adjusted.

[0043] It should be noted that, since the embodiments of this application can adjust the water flow from the first common end to the second common end by controlling the valve assembly 400 based on the complementary structure of the heat pump device 200 and the auxiliary heat exchange device 300 connected in series, the problem of poor performance of the individual heat pump device can be solved, thereby improving the heating effect of the heat pump water system.

[0044] It should be noted that when the water flow from the first common end to the second common end decreases, the water flow from the second return water pipe to the second supply water pipe through the auxiliary heat exchanger 300 increases; conversely, when the water flow from the first common end to the second common end increases, the water flow from the second return water pipe to the second supply water pipe through the auxiliary heat exchanger 300 decreases. Therefore, by controlling the valve assembly 400, the water flow from the first common end to the second common end can be adjusted, thereby adjusting the water flow from the second return water pipe to the second supply water pipe through the auxiliary heat exchanger 300. This allows control of the auxiliary heat exchanger 300's hot water production, solving the problem of poor performance of the standalone heat pump unit 200 and improving the heating effect of the heat pump water system.

[0045] Specifically, the valve assembly 400 includes a three-way valve 410, which has an inflow channel, a first outflow channel, and a second outflow channel. The three-way valve 410 is connected to the heat pump device 200 through the inflow channel, the first outflow channel is connected to the auxiliary heat exchange device 300 through the second return water pipe, and the second outflow channel is connected to the indoor heat exchange device 100.

[0046] It should be noted that, since the embodiments of this application can adjust the water flow from the inflow channel to the first outflow channel and the second outflow channel by controlling the three-way valve 410 based on the complementary structure of the heat pump device 200 and the auxiliary heat exchange device 300 in series, the problem of poor performance of the heat pump device alone can be solved, thereby improving the heating effect of the heat pump water system.

[0047] It should be noted that by controlling the three-way valve 410, the water flow from the inflow channel to the first outflow channel can be increased, while the water flow from the inflow channel to the second outflow channel can be decreased. This controls the auxiliary heat exchange equipment 300 to produce hot water, thereby solving the problem of poor performance of the standalone heat pump device 200 and improving the heating effect of the heat pump water system.

[0048] It should be noted that the three-way valve 410 can be either an on-off valve or a proportional valve. When the three-way valve 410 is an on-off valve, it can be controlled to connect the inflow channel and the first outflow channel while disconnecting the inflow channel and the second outflow channel; conversely, it can be controlled to disconnect the inflow channel and the first outflow channel while connecting the inflow channel and the second outflow channel. When the three-way valve 410 is a proportional valve, it can be controlled to increase the valve opening between the inflow channel and the first outflow channel and decrease the valve opening between the inflow channel and the second outflow channel; conversely, it can be controlled to decrease the valve opening between the inflow channel and the first outflow channel and increase the valve opening between the inflow channel and the second outflow channel. Therefore, by controlling the on-off valve or the proportional valve, the water flow from the inflow channel to the first and second outflow channels can be regulated, thereby solving the problem of poor performance of a standalone heat pump unit and improving the heating effect of the heat pump water system.

[0049] Understandably, when the three-way valve 410 is a shut-off valve, the shut-off valve can be switched to make the inflow channel and the first outflow channel connected, and the inflow channel and the second outflow channel closed. This allows the water in the heat pump water system to flow from the inflow channel to the first outflow channel, thereby controlling the auxiliary heat exchange equipment 300 to produce hot water. This solves the problem of poor performance of the standalone heat pump device 200, thus improving the heating effect of the heat pump water system.

[0050] Understandably, when the three-way valve 410 is a proportional valve, the valve opening between the inflow channel and the first outflow channel can be increased and the valve opening between the inflow channel and the second outflow channel can be decreased by controlling the switching of the proportional valve. This increases the water flow from the inflow channel to the first outflow channel, thereby controlling the auxiliary heat exchange equipment 300 to produce hot water. This solves the problem of poor performance of the standalone heat pump device 200 and improves the heating effect of the heat pump water system.

[0051] like Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a heat pump water system provided in another embodiment of this application.

[0052] In one embodiment, the valve assembly 400 includes a first two-way valve 420 and a second two-way valve 430. The first two-way valve 420 is disposed in the second return water pipeline, and the second two-way valve 430 is disposed in the first supply water pipeline, located between the first common end and the second common end.

[0053] It should be noted that, since the embodiments of this application can adjust the water flow from the first water supply pipeline to the auxiliary heat exchanger 300 and from the first common end to the second common end by controlling the first two-way valve 420 and the second two-way valve 430, based on the complementary structure of the heat pump device 200 and the auxiliary heat exchanger 300 connected in series, the problem of poor performance of the heat pump device 200 alone can be solved, thereby improving the heating effect of the heat pump water system.

[0054] It should be noted that by controlling the first two-way valve 420 and the second two-way valve 430, the opening degree of the first two-way valve 420 can be increased and the opening degree of the second two-way valve 430 can be decreased. This increases the water flow from the first water supply pipeline to the auxiliary heat exchanger 300 and decreases the water flow from the first common end to the second common end. Consequently, the auxiliary heat exchanger 300 produces hot water, thus solving the problem of poor performance of the standalone heat pump device 200 and improving the heating effect of the heat pump water system.

[0055] like Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of a heat pump water system provided in another embodiment of this application.

[0056] In one embodiment, the valve assembly 400 includes a first two-way valve 420 and a second two-way valve 430. The first two-way valve 420 is disposed in the second water supply pipeline, and the second two-way valve 430 is disposed in the first water supply pipeline, located between the first common end and the second common end.

[0057] It should be noted that, since the embodiments of this application can adjust the water flow from the first water supply pipeline to the auxiliary heat exchanger 300 and from the first common end to the second common end by controlling the first two-way valve 420 and the second two-way valve 430, based on the complementary structure of the heat pump device 200 and the auxiliary heat exchanger 300 connected in series, the problem of poor performance of the heat pump device 200 alone can be solved, thereby improving the heating effect of the heat pump water system.

[0058] It should be noted that by controlling the first two-way valve 420 and the second two-way valve 430, the opening degree of the first two-way valve 420 can be increased and the opening degree of the second two-way valve 430 can be decreased. This increases the water flow from the second return water pipe to the second supply water pipe through the auxiliary heat exchange device 300 and decreases the water flow from the first common end to the second common end. Consequently, the auxiliary heat exchange device 300 produces hot water, thus solving the problem of poor performance of the standalone heat pump device 200 and improving the heating effect of the heat pump water system.

[0059] like Figure 1 , Figure 2 and Figure 3As shown, the indoor heat exchange equipment 100 includes a fan coil unit 110, a radiant panel 120, and a floor heating system 130.

[0060] It is understandable that by using the complementary structure of the heat pump unit 200 and the auxiliary heat exchange equipment 300 in series, and by adjusting the water flow to the auxiliary heat exchange equipment 300 through the control valve assembly 400, the heating comfort of the fan coil unit 110, radiant panel 120 and underfloor heating 130 can be improved, and the problem of poor performance of the heat pump unit 200 alone can be solved, thereby improving the heating effect of the heat pump water system.

[0061] Specifically, such as Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of a heat pump device in a heat pump water system provided in one embodiment of this application.

[0062] In one embodiment, the heat pump device 200 of the heat pump water system includes, but is not limited to, a water-fluoride heat exchanger 210, a water supply pump 220, and a heat pump pipeline. The water-fluoride heat exchanger 210 and the water supply pump 220 are both installed in the heat pump pipeline. One end of the heat pump pipeline is the aforementioned water supply port, and the other end is the aforementioned water return port.

[0063] Specifically, in one embodiment, the heat pump device 200 further includes a first heat exchange coil and a compressor. In addition, the water-fluorine heat exchanger 210 includes, but is not limited to, a second heat exchange coil and a third heat exchange coil. The first heat exchange coil, the compressor, and the second heat exchange coil together form a circulation loop using fluorine as the refrigerant. The third heat exchange coil is connected to the heat pump pipeline and together with the water supply pipeline, indoor equipment, and return water pipeline, forms another circulation loop using water as the refrigerant. The second heat exchange coil and the third heat exchange coil are not connected to each other, but heat exchange can be performed between the second heat exchange coil and the third heat exchange coil.

[0064] Specifically, the number of heat pump units 200 can be set to one or more.

[0065] It is understandable that when the number of heat pump devices 200 is set to multiple, the multiple heat pump devices 200 are connected by the first water supply pipeline and the first water return pipeline.

[0066] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the heat pump water system also includes a buffer water tank 500, a water supply valve 600, and an inlet pipe. The buffer water tank 500 is located in the first return water pipeline and is connected to the inlet pipe. The water supply valve 600 is located on the inlet pipe.

[0067] Understandably, the buffer tank 500 is a device used to store water, mainly to balance the pressure and flow changes of the water in the system. When the pressure of the heat pump water system increases, water will enter the buffer tank 500, and when the pressure of the heat pump water system decreases, the water stored in the buffer tank 500 will re-enter the system, thereby maintaining the balance of the heat pump water system. Furthermore, by adjusting the water supply valve 600, the water in the buffer tank 500 can enter the auxiliary heat exchange device 300 through the inlet pipe, thereby enabling the auxiliary heat exchange device 300 to produce domestic hot water.

[0068] It is understood that the aforementioned auxiliary heat exchange equipment 300 may be a wall-hung boiler or an electric heater, and this application embodiment does not specifically limit it.

[0069] It is understood that the number of the aforementioned indoor heat exchange equipment 100 can be two, three, or more, and this application embodiment does not make a specific limitation.

[0070] It should be noted that regarding the installation location of the aforementioned indoor heat exchange equipment, multiple indoor heat exchange equipment can be installed in the same space, for example, multiple indoor heat exchange equipment can be installed simultaneously in a room, or multiple indoor heat exchange equipment can be installed simultaneously in a living room; alternatively, multiple indoor heat exchange equipment can also be installed in different spaces, for example, some indoor heat exchange equipment can be installed in a room and others in a living room, or some indoor heat exchange equipment can be installed in a first room and others in a second room. This application does not specifically limit the installation location of the indoor heat exchange equipment in this embodiment.

[0071] It should be noted that, regarding the installation location of the indoor heat exchange equipment within the space, in this embodiment of the application, the indoor heat exchange equipment can be installed on the ceiling of the room, or on the floor of the room, or the installation location of the indoor heat exchange equipment can be reasonably allocated according to actual usage needs. This embodiment of the application does not make specific limitations in this regard.

[0072] Additionally, it should be noted that the type of indoor heat exchange equipment mentioned above can be a fan coil terminal combined with a fan coil unit, or a radiant terminal combined with a radiant panel, such as a ceiling radiant panel or a floor heating system, or other types of terminal equipment. This application embodiment does not specifically limit this type of equipment.

[0073] Based on the structure of the heat pump water system in the above embodiments, the following presents various embodiments of the control method of the heat pump water system of this application.

[0074] like Figure 5 As shown, Figure 5This is a flowchart of a control method for a heat pump water system provided in one embodiment of this application; the control method can be applied to the heat pump water system of the above embodiment, including but not limited to steps S110 and S120.

[0075] Step S110: Receive valve switching command;

[0076] Step S120: Switch the control valve assembly according to the valve switching command to increase the water flow from the second return water pipeline to the second supply water pipeline through the auxiliary heat exchange equipment, and control the auxiliary heat exchange equipment to produce hot water.

[0077] In one embodiment, firstly, a valve switching command is received; then, the valve assembly is switched according to the received valve switching command to increase the water flow from the second return water pipe to the second supply water pipe through the auxiliary heat exchange equipment, thereby controlling the auxiliary heat exchange equipment to produce hot water. Therefore, by controlling the auxiliary heat exchange equipment to produce hot water, the problem of poor performance of a standalone heat pump unit can be solved, thereby improving the heating effect of the heat pump water system.

[0078] Specifically, the common end where the second return water pipe intersects with the first supply water pipe is called the first common end, and the common end where the second supply water pipe intersects with the first supply water pipe is called the second common end. Valve assemblies are also installed on the first supply water pipe. Furthermore, the control method for the heat pump water system also includes the following:

[0079] In the first scenario, the valve assembly is switched according to the valve switching command to reduce the water flow from the first common end to the second common end.

[0080] In one embodiment, firstly, a valve switching command is received; then, the valve assembly is switched according to the received valve switching command to reduce the water flow from the first common end to the second common end, thereby controlling the auxiliary heat exchange equipment to produce hot water. Therefore, by controlling the auxiliary heat exchange equipment to produce hot water, the problem of poor performance of a standalone heat pump unit can be solved, thereby improving the heating effect of the heat pump water system.

[0081] Understandably, by controlling the valve assembly, the water flow from the second return water pipe to the second supply water pipe via the auxiliary heat exchanger can be increased, while the water flow from the first common end to the second common end can be decreased, thereby controlling the hot water production of the auxiliary heat exchanger. Therefore, by controlling the hot water production of the auxiliary heat exchanger, the problem of poor performance of a standalone heat pump unit can be solved, thus improving the heating effect of the heat pump water system.

[0082] It should be noted that the valve switching command is generated through at least one of the following conditions:

[0083] In the first scenario, the outdoor temperature is obtained. When the outdoor temperature is less than or equal to the set outdoor temperature, a valve switching command is generated.

[0084] In the second scenario, the water supply temperature of the indoor heat exchange equipment is obtained. When the water supply temperature is lower than the set water supply temperature, a valve switching command is generated.

[0085] The third scenario involves obtaining the indoor temperature. When the indoor temperature is less than or equal to the set indoor temperature, a valve switching command is generated.

[0086] The fourth scenario involves obtaining the current power of the heat pump device. If the current power is greater than or equal to the preset maximum power, a valve switching command is generated.

[0087] In one embodiment, a valve switching command is generated when the obtained outdoor temperature is less than or equal to the outdoor set temperature; or, a valve switching command is generated when the obtained water supply temperature of the indoor heat exchanger is less than the set water supply temperature; a valve switching command is generated when the obtained indoor temperature is less than or equal to the indoor set temperature; or a valve switching command is generated when the obtained current efficiency of the heat pump device is greater than or equal to the preset maximum operating power.

[0088] It should be noted that when at least one of the above conditions is met—the outdoor temperature, the supply water temperature of the indoor heat exchanger, the indoor temperature, and the current power of the heat pump unit—a valve switching command is generated. This command controls the valve assembly to switch, increasing the water flow from the second return water pipe through the auxiliary heat exchanger to the second supply water pipe, and decreasing the water flow from the first common terminal to the second common terminal. This, in turn, controls the auxiliary heat exchanger to produce hot water. Therefore, by controlling the auxiliary heat exchanger to produce hot water, the problem of poor performance of a standalone heat pump unit can be solved, thereby improving the heating effect of the heat pump water system.

[0089] Specifically, the valve assembly includes a three-way valve, which is equipped with an inflow channel, a first outflow channel, and a second outflow channel. The inflow channel connects the three-way valve to the heat pump unit, the first outflow channel connects to the auxiliary heat exchange equipment via a second return water pipe, and the second outflow channel connects to the indoor heat exchange equipment. The step of switching the valve assembly in step S120 can be divided into the following cases:

[0090] In the first scenario, when the three-way valve is a shut-off valve, it controls the connection between the inflow channel and the first outflow channel, and controls the shut-off between the inflow channel and the second outflow channel.

[0091] In the second scenario, when the three-way valve is a proportional valve, the valve opening between the inflow channel and the first outflow channel is increased, while the valve opening between the inflow channel and the second outflow channel is decreased.

[0092] In one embodiment, when the three-way valve is selected as an on / off valve, if a valve switching command is received, the on / off valve is switched and controlled, so that the inflow channel on the on / off valve is connected to the first outflow channel and the inflow channel is closed to the second outflow channel; when the three-way valve is selected as a proportional valve, if a valve switching command is received, the proportional valve is switched and controlled, so that the valve opening between the inflow channel and the first outflow channel is increased and the valve opening between the inflow channel and the second outflow channel is decreased.

[0093] It should be noted that when the inflow channel and the first outflow channel are connected by adjusting the on / off valve and the inflow channel and the second outflow channel are closed, water flows through the first water supply pipeline to the auxiliary heat exchange equipment, and hot water can be produced through the auxiliary heat exchange equipment. Therefore, the problem of poor performance of a standalone heat pump device can be solved, thereby improving the heating effect of the heat pump water system.

[0094] It should be noted that by adjusting the proportional valve to increase the valve opening between the inflow channel and the first outflow channel and decrease the valve opening between the inflow channel and the second outflow channel, the water flow from the second return water pipe through the auxiliary heat exchanger to the second supply water pipe increases, while the water flow from the first common end to the second common end decreases. Thus, by adjusting the proportional valve to change the valve opening between the inflow channel and the first and second outflow channels, the water flow from the inflow channel through the first outflow channel to the auxiliary heat exchanger increases, thereby controlling the auxiliary heat exchanger to produce hot water. Therefore, this solves the problem of poor performance of a standalone heat pump unit, thereby improving the heating effect of the heat pump water system.

[0095] Specifically, control methods also include the following:

[0096] In the first scenario, when the three-way valve is used as an on / off valve, the set water supply temperature is used as the set outlet water temperature of the auxiliary heat exchange equipment.

[0097] In the second scenario, when the three-way valve is a proportional valve, the set outlet water temperature of the auxiliary heat exchanger is determined based on the set supply water temperature and the supply water temperature.

[0098] In one embodiment, when the three-way valve is selected as an on / off valve, the set outlet water temperature of the auxiliary heat exchanger is determined based on the set supply water temperature; when the three-way valve is selected as a proportional valve, the set outlet water temperature of the auxiliary heat exchanger is determined based on the set supply water temperature and the detected supply water temperature.

[0099] It should be noted that when the three-way valve is a proportional valve, the set outlet water temperature of the auxiliary heat exchanger is: Ta2=Ta+(Ta-T10)+Td, where Ta2 is the set outlet water temperature of the auxiliary heat exchanger, Ta is the set supply water temperature, T10 is the supply water temperature, and Td is the compensation temperature.

[0100] It is understood that the aforementioned compensation temperature can be set according to actual needs and is a fixed value; this application embodiment does not impose specific limitations.

[0101] It should be noted that the valve assembly includes a first two-way valve and a second two-way valve. The first two-way valve is configured in the second return water pipeline or the second supply water pipeline, and the second two-way valve is configured in the first supply water pipeline between the first common end and the second common end. The step of switching the valve assembly in step S120 can also be divided into the following cases:

[0102] In the first scenario, increase the valve opening of the first two-way valve and decrease the valve opening of the second two-way valve.

[0103] In one embodiment, when a valve switching command is received, the first two-way valve and the second two-way valve are switched, thereby increasing the valve opening of the first two-way valve and decreasing the valve opening of the second two-way valve.

[0104] It should be noted that by adjusting the first two-way valve and the second two-way valve to increase the opening of the first two-way valve and decrease the opening of the second two-way valve, the water flow from the second return water pipe to the second supply water pipe through the auxiliary heat exchange equipment increases, thereby controlling the auxiliary heat exchange equipment to produce hot water. Therefore, the problem of poor performance of a standalone heat pump device can be solved, thus improving the heating effect of the heat pump water system.

[0105] Specifically, after the valve assembly switching step in step S120 above, the following situations can be further classified:

[0106] In the first scenario, when the water supply temperature is greater than or equal to the set water supply temperature and the indoor temperature is greater than the set indoor temperature, the auxiliary heat exchange equipment is controlled to stop producing hot water and the heat pump device is controlled to operate, as well as the valve assembly is controlled to reduce the water flow from the second return water pipe through the auxiliary heat exchange equipment to the second water supply pipe, and to increase the water flow from the first common end to the second common end.

[0107] In one embodiment, when the detected water supply temperature is greater than or equal to the set water supply temperature, and the detected indoor temperature is greater than the set indoor temperature, the auxiliary heat exchange equipment is stopped from producing hot water, the heat pump device is operated, and the switching valve assembly is controlled to reduce the water flow from the second return water pipe through the auxiliary heat exchange equipment to the second water supply pipe, and to increase the water flow from the first common end to the second common end.

[0108] It should be noted that when the detected water supply temperature is greater than or equal to the set water supply temperature, and the detected indoor temperature is greater than the set indoor temperature, the heat pump device is controlled to operate and the auxiliary heat exchange equipment is controlled to stop producing hot water. This can reduce energy consumption, improve energy efficiency, and reduce heating costs while maintaining indoor comfort.

[0109] like Figure 6 As shown, Figure 6 This is an overall flowchart of a control method for a heat pump water system provided in one embodiment of this application; the control method can be applied to the heat pump water system of the above embodiment, and the specific steps are as follows:

[0110] The heat pump water system has started working;

[0111] In heating mode, the system parameters are set so that the three-way valve is on / off, the first water supply pipe and the first return water pipe are opened, and the heat pump device is turned on.

[0112] The water supply temperature T10 is set to the set water supply temperature;

[0113] Determine if the outdoor temperature is less than or equal to the outdoor set temperature;

[0114] If the outdoor temperature is higher than the set outdoor temperature, the heat pump unit will continue to operate and increase its output capacity as needed;

[0115] If the outdoor temperature is less than or equal to the outdoor set temperature, determine whether the water supply temperature T10 is greater than or equal to the set water supply temperature.

[0116] If the water supply temperature T10 is greater than or equal to the set water supply temperature, the heat pump unit will continue to operate and increase its output capacity as needed.

[0117] If the water supply temperature T10 is lower than the set water supply temperature, determine whether the current power of the heat pump unit is the maximum power.

[0118] If the current power of the heat pump unit is less than the preset maximum power, the heat pump unit will continue to operate and increase its output capacity as needed;

[0119] If the current power of the heat pump device is greater than or equal to the preset maximum power, determine whether the indoor temperature is less than or equal to the indoor set temperature.

[0120] If the indoor temperature is higher than the set indoor temperature, the heat pump unit will continue to operate and increase its output capacity as needed;

[0121] If the indoor temperature is less than or equal to the set indoor temperature, determine whether the auxiliary heat exchange equipment is producing domestic hot water.

[0122] If the auxiliary heat exchange equipment is producing domestic hot water, keep the heat pump unit running and wait for the auxiliary heat exchange equipment to finish producing domestic hot water.

[0123] If the auxiliary heat exchange equipment is not producing domestic hot water, the heat pump unit will stop working.

[0124] Switch valve assembly to connect the inflow channel and the first outflow channel, and to disconnect the inflow channel and the second outflow channel;

[0125] The auxiliary heat exchange equipment starts producing hot water, and the set supply water temperature is used as the set outlet water temperature of the auxiliary heat exchange equipment.

[0126] If the water supply temperature is lower than the set water supply temperature, the auxiliary heat exchange equipment will continue to produce hot water, and the set water supply temperature will be used as the set outlet water temperature of the auxiliary heat exchange equipment.

[0127] If the water supply temperature is greater than or equal to the set water supply temperature, then determine whether the indoor temperature is greater than the set indoor temperature.

[0128] If the indoor temperature is lower than the set indoor temperature, the auxiliary heat exchange equipment will continue to produce hot water, and the set supply water temperature will be used as the set outlet water temperature of the auxiliary heat exchange equipment.

[0129] If the indoor temperature is higher than the set indoor temperature, the auxiliary heat exchange equipment will stop producing hot water.

[0130] Switch valve assembly to close the inflow channel and the first outflow channel, and open the inflow channel and the second outflow channel;

[0131] The heat pump unit restarted;

[0132] The heat pump water system has ceased operation.

[0133] In one embodiment, the heat pump water system starts working and is in heating mode. The system parameter setting three-way valve is set as an on / off valve, the first water supply pipeline and the first return water pipeline are opened, the heat pump device starts working, and the water supply temperature T10 is set to the set water supply temperature.

[0134] In one embodiment, when the outdoor temperature is greater than the outdoor set temperature, or the water supply temperature T10 is greater than or equal to the set water supply temperature, or the current power of the heat pump device is less than the preset maximum power, or the indoor temperature is greater than the indoor set temperature, the heat pump device continues to operate and increases its output capacity as needed.

[0135] In one embodiment, when the outdoor temperature is less than or equal to the outdoor set temperature, or the water supply temperature T10 is less than the set water supply temperature, or the current power of the heat pump device is greater than or equal to the preset maximum power, or the indoor temperature is greater than or equal to the indoor set temperature, and the auxiliary heat exchange device is not producing domestic hot water, the heat pump device stops working and controls the switching valve assembly to make the inflow channel connected to the first outflow channel and the inflow channel closed to the second outflow channel. It also controls the auxiliary heat exchange device to start producing hot water and uses the set water supply temperature as the set outlet water temperature of the auxiliary heat exchange device.

[0136] In one embodiment, when the auxiliary heat exchange equipment is producing domestic hot water, the heat pump device is kept running and the process continues until the auxiliary heat exchange equipment finishes producing domestic hot water.

[0137] In one embodiment, when the water supply temperature is greater than or equal to the set water supply temperature and the indoor temperature is greater than the set indoor temperature, the auxiliary heat exchange equipment stops producing hot water, and the switching valve assembly is controlled to shut off the inflow channel from the first outflow channel and open the inflow channel from the second outflow channel, and the heat pump device is controlled to restart.

[0138] It should be noted that, based on the complementary structure of the heat pump device and the auxiliary heat exchange equipment connected in series, the water flow to the auxiliary heat exchange equipment is adjusted by controlling the on / off valve, which solves the problem of poor performance of the heat pump device alone, thereby improving the heating effect of the heat pump water system.

[0139] It is understandable that controlling the auxiliary heat exchanger to produce hot water again after it has finished producing domestic hot water can improve the performance and efficiency of the heat pump water system, and save energy to the greatest extent without reducing indoor comfort.

[0140] It should be noted that when the inflow channel is connected to the first outflow channel and the inflow channel is closed to the second outflow channel, the water flow from the second return water pipe to the second supply water pipe through the auxiliary heat exchange equipment increases, thereby controlling the auxiliary heat exchange equipment to produce hot water. This solves the problem of poor performance of a standalone heat pump device and improves the heating effect of the heat pump water system.

[0141] It should be noted that when the detected water supply temperature is greater than or equal to the set water supply temperature, and the detected indoor temperature is greater than the set indoor temperature, the heat pump device is controlled to operate and the auxiliary heat exchange equipment is controlled to stop producing hot water. This can reduce energy consumption, improve energy efficiency, and reduce heating costs while maintaining indoor comfort.

[0142] like Figure 7 As shown, Figure 7This is an overall flowchart of a control method for a heat pump water system provided in another embodiment of this application; this control method can be applied to the heat pump water system of the above embodiment, and the specific steps are as follows:

[0143] The heat pump water system has started working;

[0144] In heating mode, the system parameters are set so that the three-way valve is a proportional valve, the valve opening between the inflow channel and the first outflow channel is increased, and the valve opening between the inflow channel and the second outflow channel is decreased.

[0145] The water supply temperature T10 is set to the set water supply temperature;

[0146] Determine if the outdoor temperature is less than or equal to the outdoor set temperature;

[0147] If the outdoor temperature is higher than the set outdoor temperature, the heat pump unit will continue to operate and increase its output capacity as needed;

[0148] If the outdoor temperature is less than or equal to the outdoor set temperature, determine whether the water supply temperature T10 is greater than or equal to the set water supply temperature.

[0149] If the water supply temperature T10 is greater than or equal to the set water supply temperature, the heat pump unit will continue to operate and increase its output capacity as needed.

[0150] If the water supply temperature T10 is less than the set water supply temperature, determine whether the current power of the heat pump device is greater than or equal to the preset maximum power.

[0151] If the current power of the heat pump unit is less than the preset maximum power, the heat pump unit will continue to operate and increase its output capacity as needed;

[0152] If the current power of the heat pump device is greater than or equal to the preset maximum power, determine whether the indoor temperature is less than or equal to the indoor set temperature.

[0153] If the indoor temperature is higher than the set indoor temperature, the heat pump unit will continue to operate and increase its output capacity as needed;

[0154] If the indoor temperature is less than or equal to the indoor set temperature, determine whether the auxiliary heat exchange equipment is producing domestic hot water.

[0155] If the auxiliary heat exchange equipment is producing domestic hot water, keep the heat pump unit running and wait for the auxiliary heat exchange equipment to finish producing domestic hot water.

[0156] If the auxiliary heat exchange equipment is not producing domestic hot water, the heat pump unit will stop working.

[0157] When the valve assembly is switched, the valve opening between the inflow channel and the first outflow channel increases, while the valve opening between the inflow channel and the second outflow channel decreases.

[0158] The auxiliary heat exchange equipment starts producing hot water, and the set supply water temperature is used as the set outlet water temperature of the auxiliary heat exchange equipment.

[0159] If the water supply temperature is lower than the set water supply temperature, the auxiliary heat exchange equipment will continue to produce hot water, and the set water supply temperature will be used as the set outlet water temperature of the auxiliary heat exchange equipment.

[0160] If the water supply temperature is greater than or equal to the set water supply temperature, then determine whether the indoor temperature is greater than the set indoor temperature.

[0161] If the indoor temperature is lower than the set indoor temperature, the auxiliary heat exchange equipment will continue to produce hot water, and the set supply water temperature will be used as the set outlet water temperature of the auxiliary heat exchange equipment.

[0162] If the indoor temperature is higher than the set indoor temperature, the auxiliary heat exchange equipment will stop producing hot water.

[0163] Switch valve assembly to close the inflow channel and the first outflow channel, and open the inflow channel and the second outflow channel;

[0164] The heat pump unit restarted;

[0165] The heat pump water system has ceased operation.

[0166] In one embodiment, the heat pump water system starts working and is in heating mode. The system parameter setting three-way valve is set as a proportional valve, the first water supply pipeline and the first return water pipeline are opened, the heat pump device starts working, and the water supply temperature T10 is set to the set water supply temperature.

[0167] In one embodiment, when the outdoor temperature is greater than the outdoor set temperature, or the water supply temperature T10 is greater than or equal to the set water supply temperature, or the current power of the heat pump device is less than the preset maximum power, or the indoor temperature is greater than the indoor set temperature, the heat pump device continues to operate and increases its output capacity as needed.

[0168] In one embodiment, when the outdoor temperature is less than or equal to the outdoor set temperature, or the water supply temperature T10 is less than the set water supply temperature, or the current power of the heat pump device is greater than or equal to the maximum power, or the indoor temperature is less than or equal to the indoor set temperature, and the auxiliary heat exchange equipment is not producing domestic hot water, the heat pump device stops working and controls the switching valve assembly to increase the valve opening between the inflow channel and the first outflow channel, decrease the valve opening between the inflow channel and the second outflow channel, and controls the auxiliary heat exchange equipment to start producing hot water, and determines the set outlet water temperature based on the set water supply temperature and the set water supply temperature.

[0169] In one embodiment, when the auxiliary heat exchange equipment is producing domestic hot water, the heat pump device is kept running and the process continues until the auxiliary heat exchange equipment finishes producing domestic hot water.

[0170] In one embodiment, when the water supply temperature is greater than or equal to the set water supply temperature and the indoor temperature is greater than the set indoor temperature, the auxiliary heat exchange equipment stops producing hot water, and the switching valve assembly is controlled to shut off the inflow channel from the first outflow channel and open the inflow channel from the second outflow channel, and the heat pump device is controlled to restart.

[0171] It should be noted that, based on the complementary structure of the heat pump device and the auxiliary heat exchange equipment connected in series, the water flow to the auxiliary heat exchange equipment is adjusted by controlling the proportional valve, which solves the problem of poor performance of the heat pump device alone, thereby improving the heating effect of the heat pump water system.

[0172] It is understandable that controlling the auxiliary heat exchanger to produce hot water again after it has finished producing domestic hot water can improve the performance and efficiency of the heat pump water system, and save energy to the greatest extent without reducing indoor comfort.

[0173] It should be noted that when the valve opening between the inflow channel and the first outflow channel increases, and the valve opening between the inflow channel and the second outflow channel decreases, the water flow from the second return water pipe to the second supply water pipe through the auxiliary heat exchange equipment increases, thereby controlling the auxiliary heat exchange equipment to produce hot water. This solves the problem of poor performance of a standalone heat pump device and improves the heating effect of the heat pump water system.

[0174] It should be noted that when the detected water supply temperature is greater than or equal to the set water supply temperature, and the detected indoor temperature is greater than the set indoor temperature, the heat pump device is controlled to operate and the auxiliary heat exchange equipment is controlled to stop producing hot water. This can reduce energy consumption, improve energy efficiency, and reduce heating costs while maintaining indoor comfort.

[0175] It should be noted that the set outlet water temperature of the auxiliary heat exchanger is: Ta2=Ta+(Ta-T10)+Td, where Ta2 is the set outlet water temperature of the auxiliary heat exchanger, Ta is the set supply water temperature, T10 is the supply water temperature, and Td is the compensation temperature.

[0176] like Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of a controller for executing a control method according to an embodiment of this application. The controller 700 implemented in this application includes: a processor 710, a memory 720, and a computer program stored in the memory 720 and executable on the processor 710, wherein... Figure 8 The example uses a processor 710 and a memory 720.

[0177] The processor 710 and memory 720 can be connected via a bus or other means. Figure 8 Taking the example of a connection between China and Israel via a bus.

[0178] Memory 720, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 720 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 720 may optionally include remotely located memories 720 relative to processor 710, which can be connected to controller 700 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0179] Those skilled in the art will understand that Figure 8 The device structure shown does not constitute a limitation on the controller 700 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0180] exist Figure 8 In the controller 700 shown, the processor 710 can be used to call the control program stored in the memory 720 to implement the control method described above. Specifically, the non-transitory software program and instructions required to implement the control method of the above embodiment are stored in the memory 720, and when executed by the processor 710, the control method of the above embodiment is executed.

[0181] It is worth noting that since the controller 700 of this application embodiment can execute the control method of any of the above embodiments, the specific implementation method and technical effect of the controller 700 of this application embodiment can refer to the specific implementation method and technical effect of the control method of any of the above embodiments.

[0182] Furthermore, one embodiment of this application also provides a computer-readable storage medium storing computer-executable instructions for performing the control method described above. Exemplarily, the above-described control method is performed... Figures 5 to 7 The methods and steps in the text.

[0183] It is worth noting that, since the computer-readable storage medium of this application embodiment can execute the control method of any of the above embodiments, the specific implementation and technical effects of the computer-readable storage medium of this application embodiment can be referred to the specific implementation and technical effects of the control method of any of the above embodiments.

[0184] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0185] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A heat pump water system, characterized in that, include: Indoor heat exchange equipment; The heat pump device is connected to the inlet of the indoor heat exchange equipment through a first water supply pipeline and to the outlet of the indoor heat exchange equipment through a first return water pipeline. The auxiliary heat exchange equipment is connected to the first water supply pipeline through the second return water pipeline and the second water supply pipeline; A valve assembly is disposed in the second return water pipeline and / or the second supply water pipeline, the valve assembly being used to regulate the water flow rate from the second return water pipeline through the auxiliary heat exchange equipment to the second supply water pipeline.

2. The heat pump water system according to claim 1, characterized in that, The second return water pipeline and the first water supply pipeline intersect at a first common end, and the second water supply pipeline and the first water supply pipeline intersect at a second common end. The valve assembly is also disposed on the first water supply pipeline, and the valve assembly is also used to regulate the water flow from the first common end to the second common end.

3. The heat pump water system according to claim 2, characterized in that, The valve assembly includes a three-way valve, which has an inflow channel, a first outflow channel, and a second outflow channel. The inflow channel is connected to the heat pump device, the first outflow channel is connected to the auxiliary heat exchange device through the second return water pipeline, and the second outflow channel is connected to the indoor heat exchange device.

4. The heat pump water system according to claim 2, characterized in that, The valve assembly includes a first two-way valve and a second two-way valve. The first two-way valve is disposed in the second return water pipeline or the second supply water pipeline, and the second two-way valve is disposed in the first supply water pipeline between the first common end and the second common end.

5. The heat pump water system according to any one of claims 1 to 4, characterized in that, The indoor heat exchange equipment includes at least one of the following: fan coil unit, radiant panel, and underfloor heating.

6. The heat pump water system according to any one of claims 1 to 4, characterized in that, The heat pump device is equipped with a water-fluorine heat exchanger, a water pump, and a heat pump pipeline. The water-fluorine heat exchanger and the water pump are both located in the heat pump pipeline. One end of the heat pump pipeline is connected to the first water supply pipeline, and the other end is connected to the first return water pipeline.

7. The heat pump water system according to any one of claims 1 to 4, characterized in that, The heat pump water system also includes a buffer water tank, a water supply valve, and an inlet pipe. The buffer water tank is located in the first return water pipeline, the inlet pipe is connected to the buffer water tank, and the water supply valve is located in the inlet pipe.

8. A control method for a heat pump water system, characterized in that, The control method, applied to the heat pump water system according to any one of claims 1 to 7, comprises: Receive valve switching commands; The valve assembly is switched and controlled according to the valve switching command to increase the water flow from the second return water pipeline to the second supply water pipeline through the auxiliary heat exchange equipment, and the auxiliary heat exchange equipment is controlled to produce hot water.

9. The control method according to claim 8, characterized in that, The second return water pipeline and the first water supply pipeline intersect at a first common end, and the second water supply pipeline and the first water supply pipeline intersect at a second common end. The valve assembly is also disposed on the first water supply pipeline. The control method further includes: The valve assembly is switched according to the valve switching command to reduce the water flow from the first common end to the second common end.

10. The control method according to claim 9, characterized in that, The valve switching command is generated through at least one of the following steps: Obtain the outdoor temperature; when the outdoor temperature is less than or equal to the outdoor set temperature, generate the valve switching command. The water supply temperature of the indoor heat exchanger is obtained, and when the water supply temperature is lower than the set water supply temperature, the valve switching command is generated. The indoor temperature is obtained, and when the indoor temperature is less than or equal to the indoor set temperature, the valve switching command is generated. Obtain the current power of the heat pump device, and when the current power is greater than or equal to the preset maximum power, generate the valve switching command.

11. The control method according to claim 10, characterized in that, The valve assembly includes a three-way valve, which has an inflow channel, a first outflow channel, and a second outflow channel. The inflow channel is connected to the heat pump device, the first outflow channel is connected to the auxiliary heat exchange device via a second return water pipe, and the second outflow channel is connected to the indoor heat exchange device. Switching the valve assembly includes one of the following: When the three-way valve is a shut-off valve, it controls the connection between the inflow channel and the first outflow channel, and controls the disconnection between the inflow channel and the second outflow channel; When the three-way valve is a proportional valve, the valve opening between the inflow channel and the first outflow channel is increased, and the valve opening between the inflow channel and the second outflow channel is decreased.

12. The control method according to claim 11, characterized in that, The control method further includes one of the following: When the three-way valve is an on / off valve, the set water supply temperature is used as the set water outlet temperature of the auxiliary heat exchanger. When the three-way valve is a proportional valve, the set outlet water temperature of the auxiliary heat exchanger is determined according to the set supply water temperature and the supply water temperature.

13. The control method according to claim 10, characterized in that, The valve assembly includes a first two-way valve and a second two-way valve. The first two-way valve is disposed in the second return water pipeline or the second supply water pipeline, and the second two-way valve is disposed in the first supply water pipeline between the first common end and the second common end. Switching the valve assembly includes: Increase the valve opening of the first two-way valve and decrease the valve opening of the second two-way valve.

14. The control method according to any one of claims 10 to 13, characterized in that, After switching the valve assembly, the control method further includes: When the water supply temperature is greater than or equal to the set water supply temperature and the indoor temperature is greater than the set indoor temperature, the auxiliary heat exchange equipment is controlled to stop producing hot water and the heat pump device is controlled to operate, and the valve assembly is controlled to reduce the water flow from the second return water pipe through the auxiliary heat exchange equipment to the second water supply pipe, and to increase the water flow from the first common end to the second common end.

15. A controller, characterized in that, include: The system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, performs the control method for a heat pump water system as described in any one of claims 8 to 14.

16. A computer-readable storage medium, characterized in that: The system stores computer-executable instructions for performing a control method for a heat pump water system as described in any one of claims 8 to 14.

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