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

Abstract

The embodiment of the invention discloses a heat pump system and a control method thereof, a controller and a computer readable storage medium. The heat pump system comprises indoor heat exchange equipment, a heat pump device, auxiliary heat exchange equipment and a valve assembly. The heat pump device communicates with a water inlet of the indoor heat exchange equipment through a first water supply pipeline and communicates with a water outlet of the indoor heat exchange equipment through a first water return pipeline. The auxiliary heat exchange equipment is communicated to the first water supply pipeline through a second water supply pipeline and is communicated to the first water return pipeline through a second water return pipeline; the valve assembly is arranged on the second water supply pipeline and / or the second water return 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 embodiment of the invention, heat energy complementation of the heat pump device and the auxiliary heat exchange equipment can be realized, so that a better heat energy effect can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of household electrical appliances, and in particular, to a heat pump system, a control method thereof, a controller, and a computer-readable storage medium. Background Art

[0002] With the continuous development of the social economy and the continuous progress of technology, people's living standards have been continuously improved, and all-in-one air-to-water heat pumps have been widely used. Currently, the all-in-one air-to-water heat pumps usually include an outdoor unit and multiple indoor units. Among them, in the actual application process, usually only one outdoor unit is used to supply water to multiple indoor units. However, in some scenarios, the heating effect of the outdoor unit is not good. If only a single outdoor unit is used for heating, the energy efficiency is likely to be poor. Summary of the Invention

[0003] Embodiments of the present application provide a heat pump system, a control method thereof, a controller, and a computer-readable storage medium, which can realize the heat energy complementarity between the heat pump device and the auxiliary heat exchange device, and thus can achieve a better heat energy effect.

[0004] In a first aspect, embodiments of the present application provide a heat pump system, including:

[0005] An indoor heat exchange device;

[0006] A heat pump device, which is connected to the water inlet of the indoor heat exchange device through a first water supply pipeline and is connected to the water outlet of the indoor heat exchange device through a first water return pipeline;

[0007] An auxiliary heat exchange device, which is connected to the first water supply pipeline through a second water supply pipeline and is connected to the first water return pipeline through a second water return pipeline;

[0008] A valve assembly, which is arranged on the second water supply pipeline and / or the second water return pipeline, and the valve assembly is used to adjust the water flow rate flowing from the second water return pipeline through the auxiliary heat exchange device to the second water supply pipeline.

[0009] According to some embodiments of the present application, the valve assembly is further arranged on the first water supply pipeline and / or the first water return pipeline.

[0010] According to some embodiments of the present application, the valve assembly includes a first three-way valve and a second three-way valve. The first three-way valve is arranged on the first water supply pipeline and is connected to the auxiliary heat exchange device through the second water supply pipeline. The second three-way valve is arranged on the first water return pipeline and is connected to the auxiliary heat exchange device through the second water return pipeline.

[0011] According to some embodiments of the present application, the first three-way valve includes a first inflow channel, a second inflow channel, and a first outflow channel. The first inflow channel is connected to the heat pump device, the second inflow channel is connected to the auxiliary heat exchange device, and the first outflow channel is connected to the indoor heat exchange device; the second three-way valve includes a third inflow channel, a second outflow channel, and a third outflow channel. The third inflow channel is connected to the indoor heat exchange device, the second outflow channel is connected to the heat pump device, and the third outflow channel is connected to the auxiliary heat exchange device.

[0012] According to some embodiments of the present application, the valve assembly includes a first two-way valve and a second two-way valve. The first two-way valve is disposed on the first water supply pipeline, and the second two-way valve is disposed on the second water supply pipeline.

[0013] According to some embodiments of the present application, the heat pump device includes a line controller and multiple heat pump units. The line controller is communicatively connected to the multiple heat pump units. The multiple heat pump units are all connected to the water inlet of the indoor heat exchange device through the first water supply pipeline and are all connected to the water outlet of the indoor heat exchange device through the first return water pipeline.

[0014] According to some embodiments of the present application, the heat pump unit 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 disposed on 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.

[0015] According to some embodiments of the present application, the indoor heat exchange device includes at least one of the following: fan coil unit, radiant panel, floor heating.

[0016] According to some embodiments of the present application, the heat pump system further includes a buffer water tank, a make-up water valve, and a water inlet pipe. The buffer water tank is disposed on the first return water pipeline. The water inlet pipe is connected to the buffer water tank, and the make-up water valve is disposed on the water inlet pipe.

[0017] In a second aspect, an embodiment of the present application provides a control method for a heat pump system, which is applied to the heat pump system according to the first aspect of the above embodiments. The control method includes:

[0018] Receiving a valve switching instruction;

[0019] Controlling the valve assembly according to the valve switching instruction to adjust the water flow rate flowing from the second return water pipeline through the auxiliary heat exchange device to the second water supply pipeline.

[0020] According to some embodiments of the present application, the controlling the valve assembly according to the valve switching instruction includes:

[0021] Obtaining the current state of the auxiliary heat exchange device;

[0022] When the current state of the auxiliary heat exchange device is an idle state, controlling the valve assembly according to the valve switching instruction;

[0023] When the current state of the auxiliary heat exchange device is the working state, the heat pump device is kept used for heating until the auxiliary heat exchange device is switched from the working state to the idle state, and the valve assembly is controlled according to the valve switching instruction.

[0024] According to some embodiments of the present application, when increasing the water flow from the second water return pipeline through the auxiliary heat exchange device to the second water supply pipeline, the valve switching instruction is generated by at least one of the following steps:

[0025] Acquire the outdoor temperature, and when the outdoor temperature is less than or equal to the outdoor set temperature, generate the valve switching instruction;

[0026] Acquiring the water supply temperature of the indoor heat exchange device, and generating the valve switching instruction when the water supply temperature is lower than the set water supply temperature;

[0027] Acquiring the indoor temperature, and generating the valve switching instruction when the indoor temperature is less than or equal to the indoor set temperature;

[0028] The current power of the heat pump device is obtained, and when the current power is greater than or equal to a preset maximum power, the valve switching instruction is generated.

[0029] According to some embodiments of the present application, the valve assembly includes a first three-way valve, the first three-way valve includes a first inflow channel, a second inflow channel and a first outflow channel, the first inflow channel is connected to the heat pump device, the second inflow channel is connected to the auxiliary heat exchange device, and the first outflow channel is connected to the indoor heat exchange device; the valve assembly is controlled according to the valve switching instruction, including one of the following:

[0030] When the three-way valve is an on-off valve, the second inflow channel and the first outflow channel are controlled to be connected and the first inflow channel and the first outflow channel are controlled to be closed according to the valve switching instruction;

[0031] When the three-way valve is a proportional valve, the valve opening between the second inflow channel and the first outflow channel is increased and the valve opening between the first inflow channel and the first outflow channel is decreased according to the valve switching instruction.

[0032] According to some embodiments of the present application, the control method further includes:

[0033] When the three-way valve is a proportional valve, determine the set outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and the water supply temperature.

[0034] According to some embodiments of the present application, the valve assembly includes a first two-way valve and a second two-way valve. The first two-way valve is arranged on the first water supply pipeline, and the second two-way valve is arranged on the second water supply pipeline or the second water return pipeline; controlling the valve assembly according to the valve switching instruction includes:

[0035] Open the second two-way valve and close the first two-way valve according to the valve switching instruction.

[0036] According to some embodiments of the present application, after controlling the valve assembly according to the valve switching instruction, the control method further includes:

[0037] When the water supply temperature is greater than or equal to the set water supply temperature and the indoor temperature is greater than the indoor set temperature, control the auxiliary heat exchange device to stop making hot water and control the heat pump device to operate, and control the valve assembly to reduce the water flow rate from the second water return pipeline through the auxiliary heat exchange device to the second water supply pipeline, and increase the water flow rate from the heat pump device to the first water supply pipeline.

[0038] In a third aspect, an embodiment of the present application provides a controller, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the control method of the heat pump system as described above.

[0039] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, storing computer-executable instructions for executing the control method of the heat pump system as described above.

[0040] According to the technical solution of the embodiment of the present application, it has at least the following beneficial effects: The heat pump system includes an indoor heat exchange device, a heat pump unit, an auxiliary heat exchange device, and a valve assembly; wherein, the heat pump unit is connected to the water inlet of the indoor heat exchange device through a first water supply pipeline, and the heat pump unit is also connected to the water outlet of the indoor heat exchange device through a first water return pipeline. By using the first water supply pipeline and the first water return pipeline, a closed circulating water path is formed between the heat pump unit and the indoor heat exchange device; and the auxiliary heat exchange device is connected to the first water supply pipeline through a second water supply pipeline and connected to the first water return pipeline through a second water return pipeline, so that a closed circulating water path is also formed between the auxiliary heat exchange device and the indoor heat exchange device; and a valve assembly is provided on the second water supply pipeline and / or the second water return pipeline; during the process of heating the water supply, the working state of the valve assembly can be adjusted according to actual needs, so that the water flow rate flowing from the second water return pipeline to the second water supply pipeline through the auxiliary heat exchange device changes, enabling the heat pump unit and the auxiliary heat exchange device to achieve complementary heat energy, and thus a better heat energy effect can be achieved.

[0041] Other features and advantages of the present application will be described in the following specification, and part of them will become obvious from the specification, or be understood by implementing the present application. The objectives and other advantages of the present application can be realized and obtained through the structures specifically pointed out in the specification, claims, and drawings. Description of the Drawings

[0042] Figure 1 is a schematic structural diagram of the heat pump system provided by the embodiment of the present application;

[0043] Figure 2 is a schematic structural diagram of the heat pump system provided by another embodiment of the present application;

[0044] Figure 3 is a schematic structural diagram of the heat pump system provided by another embodiment of the present application;

[0045] Figure 4 is a schematic internal structure diagram of the heat pump main unit provided by the embodiment of the present application;

[0046] Figure 5 is a flowchart of the control method of the heat pump system provided by the embodiment of the present application;

[0047] Figure 6 is a specific flowchart of obtaining a valve switching instruction provided by the embodiment of the present application;

[0048] Figure 7 is a specific flowchart of obtaining a valve switching instruction provided by another embodiment of the present application;

[0049] Figure 8It is a specific flowchart for obtaining a valve switching instruction provided by another embodiment of the present application;

[0050] Figure 9 It is a specific flowchart for obtaining a valve switching instruction provided by another embodiment of the present application;

[0051] Figure 10 It is a specific flowchart for controlling a valve assembly provided by an embodiment of the present application;

[0052] Figure 11 It is a specific flowchart for controlling a valve assembly provided by another embodiment of the present application;

[0053] Figure 12 It is a specific flowchart for controlling a valve assembly provided by another embodiment of the present application;

[0054] Figure 13 It is a flowchart of a control method for a heat pump system provided by another embodiment of the present application;

[0055] Figure 14 It is a specific flowchart for controlling a valve assembly provided by another embodiment of the present application;

[0056] Figure 15 It is a flowchart of a control method for a heat pump system provided by another embodiment of the present application;

[0057] Figure 16 It is a specific flowchart of a control method for a heat pump system provided by an embodiment of the present application;

[0058] Figure 17 It is a specific flowchart of a control method for a heat pump system provided by another embodiment of the present application;

[0059] Figure 18 It is a specific flowchart of a control method for a heat pump system provided by another embodiment of the present application;

[0060] Figure 19 It is a schematic structural diagram of a controller provided by an embodiment of the present application. Detailed implementation manners

[0061] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner obvious to those skilled in the art. Therefore, the various sequences in the specification and drawings are only for clearly describing a certain embodiment and do not mean that they are the necessary sequences, unless it is stated otherwise that a certain sequence must be followed.

[0062] In the description of the present application, the meaning of "a number of" is one or more, the meaning of "a plurality of" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0063] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connections (couplings).

[0064] With the continuous development of the social economy and the continuous progress of technology, people's living standards have been continuously improved, and the all-in-one air-to-water heat pump has been widely used; currently, the all-in-one air-to-water heat pump usually includes an outdoor unit and multiple indoor units. Among them, in the actual application process, usually only one outdoor unit is used to supply water to multiple indoor units; however, in some scenarios, the heating effect of the outdoor unit is not good, and if only a single outdoor unit is used for heating, it is easy to have a poor energy efficiency situation.

[0065] Based on this, the embodiments of the present application provide a heat pump system, its control method, a controller, and a computer-readable storage medium, which can realize the thermal energy complementarity between the heat pump device and the auxiliary heat exchange device, and thus can achieve a better thermal energy effect.

[0066] The following will be described with reference to the accompanying drawings:

[0067] Refer to Figure 1 , Figure 1This is a heat pump system provided by an embodiment of the present application. The heat pump system includes a heat pump device 100, an auxiliary heat exchange device 200, an indoor heat exchange device 300, and a valve assembly 400. The heat pump device 100 and the indoor heat exchange device 300 form a closed circulating water path through a first water supply pipe and a first water return pipe. The auxiliary heat exchange device 200 and the indoor heat exchange device 300 also form a closed circulating water path through a second water supply pipe and a second water return pipe, and the first water supply pipe is connected to the second water supply pipe, so that the hot water transmitted by the heat pump device 100 can converge with the hot water transmitted by the auxiliary heat exchange device 200, and then the converged water can be transmitted to the indoor heat exchange device 300 for heat exchange operation together; wherein, the valve assembly 400 can be arranged on the second water supply pipe and / or on the second water return pipe, and the valve assembly 400 is also communicated with the auxiliary heat exchange device 200, so that the valve assembly 400 can control the water flow rate of the hot water flowing from the second water return pipe through the auxiliary heat exchange device 200 into the second water supply pipe, that is, adjust the water flow rate delivered from the auxiliary heat exchange device 200 to the indoor heat exchange device. Through the above structural connection method, during the process of supplying water to the indoor heat exchange device 300, by controlling the working state of the valve assembly 400, the heat pump device 100 and the auxiliary heat exchange device 200 can achieve heat energy complementarity, thus well solving the problem of poor energy efficiency.

[0068] It should be noted that the heat pump system in the embodiment of the present application is to form a water path system by combining the heat pump device 100, the auxiliary heat exchange device 200, and the indoor heat exchange device 300. The three are connected through a water path. Exemplarily, cold water can be heated based on the heat pump device 100 and the auxiliary heat exchange device 200 to convert the cold water into hot water, and then the hot water is transmitted to the indoor heat exchange device 300 through relevant connecting pipes for heat exchange treatment. The hot water after heat exchange treatment by the indoor heat exchange device 300 will become cold water, and the cold water is directly returned to the heat pump device 100 or the auxiliary heat exchange device 200 through relevant connecting pipes for heating treatment, and the cold water is reheated into hot water again, and so on in a cycle.

[0069] It should be noted that setting the valve assembly 400 on the second water supply pipeline and / or the second water return pipeline means that the valve assembly 400 can be separately set on the second water supply pipeline or separately set on the second water return pipeline or simultaneously set on the second water supply pipeline and the second water return pipeline, and the valve assembly 400 is connected to the auxiliary heat exchange device 200; when it is necessary to use the auxiliary heat exchange device 200 to supply water to the indoor heat exchange device 300, only by using the valve assembly 400 to open the water supply channel connecting the first water supply pipeline and the auxiliary heat exchange device 200, the hot water generated by the auxiliary heat exchange device 200 can be transmitted to the indoor heat exchange device 300 through the second water supply pipeline. Among them, in general, first, the heat pump device 100 is used to supply water to the indoor heat exchange device 300. When the heat pump device 100 cannot meet the heat exchange requirements of the indoor heat exchange device 300 due to the external environment, the working state of the valve assembly 400 will be controlled so that the auxiliary heat exchange device 200 will also supply water to the indoor heat exchange device 300 to meet the heat exchange requirements of the indoor heat exchange device 300. It should be noted that the heating efficiency of the auxiliary heat exchange device 200 is generally higher than that of the heat pump device 100, so the problem of poor energy efficiency of the heat pump device 100 when it cannot meet the heat exchange requirements of the indoor heat exchange device 300 can be well solved.

[0070] It should be noted that when the valve assembly 400 is set on the second water supply pipeline or set on the second water return pipeline or simultaneously set on the second water supply pipeline and the second water return pipeline, the water flow rate from the second water return pipeline through the auxiliary heat exchange device 200 to the second water supply pipeline can be adjusted, that is, the water flow rate delivered by the auxiliary heat exchange device 200 to the indoor heat exchange device 300 can be adjusted, so that the auxiliary heat exchange device 200 and the heat pump unit 100 can simultaneously supply water to the indoor heat exchange device 300, and the problem of poor energy efficiency can be well solved.

[0071] In some embodiments of the present application, the heat pump device 100 may include an air source heat pump. Among them, the air source heat pump is an energy-saving device that uses high-level energy to make heat flow from a low-temperature heat source (air) to a high-temperature heat source. It is a form of heat pump, and the heat pump device 100 is usually installed outdoors; the auxiliary heat exchange device 200 may be a gas wall-mounted boiler or a gas water heater, as long as the device can efficiently heat cold water, and there is no limitation here. The indoor heat exchange device 300 may include a fan coil unit 310, a radiant panel 320, and a floor heating 330; among them, the fan coil unit 310 is a fan coil unit, which is one of the terminal devices of an air conditioning system composed of a small fan, a motor, and a coil (air heat exchanger), etc.; when cold water or hot water flows through the coil, heat exchange occurs with the air outside the pipe, so that the air is cooled, dehumidified or heated to adjust the indoor air parameters. It is a commonly used terminal device for cooling and heating. The radiant panel 320 is a plate-shaped heating, ventilation and air conditioning device, which is a heater that emits infrared thermal radiation or a cooler that absorbs infrared radiation. The process of heat transfer from a high-temperature object to a low-temperature object by emitting infrared rays is called thermal radiation; the absorption of infrared rays from a high-temperature object by a low-temperature object is called cold radiation; the radiant panel 320 heats or cools the working element to achieve the purpose of thermal radiation heating or cold radiation cooling to the surrounding environment. The thermal radiation panel is also called an infrared radiation panel, and the cold radiation panel is also called a negative radiation panel. The floor heating 330 is short for floor radiant heating, which uses the entire floor as a radiator, and evenly heats the entire floor through the heat medium in the floor radiant layer, and uses the heat storage of the floor itself and the law of heat radiation upward to conduct heat from bottom to top to achieve the purpose of heating.

[0072] It should be noted that the first water supply pipeline, the second water supply pipeline, the first water return pipeline, and the second water return pipeline may be rubber hoses, and the rubber hoses have good corrosion resistance and rust prevention characteristics, so that the connecting water pipes can be more durable.

[0073] It should be noted that during the process of controlling the working state of the valve assembly 400, it is possible to use the heat pump device 100 and the auxiliary heat exchange device 200 together to supply water to the indoor heat exchange device 300, or to use only the auxiliary heat exchange device 200 to supply water to the indoor heat exchange device 300; or to use only the heat pump device 100 to supply water to the indoor heat exchange device 300; for example, when the heat pump device 100 cannot work properly due to the external environment, the heat pump device 100 can be shut down, and by controlling the valve assembly 400, only the auxiliary heat exchange device 200 is used to supply water to the indoor heat exchange device 300.

[0074] Refer to Figure 1 and Figure 2, the valve assembly 400 can also be disposed on the first water supply pipeline and is also connected to the auxiliary heat exchange device 200; the valve assembly 400 is disposed on the first water return pipeline, so that the cold water coming out of the indoor heat exchange device 300 can also return to the auxiliary heat exchange device 200 through the control of the valve assembly 400, so as to realize the water return operation of the auxiliary heat exchange device 200, and thus the auxiliary heat exchange device 200 can reheat the water return of the indoor heat exchange device 300. In addition, the valve assembly 400 can also be disposed on the first water return pipeline, and similarly, the cold water coming out of the indoor heat exchange device 300 can also return to the auxiliary heat exchange device 200 through the control of the valve assembly 400, so as to realize the water return operation of the auxiliary heat exchange device 200.

[0075] Referring to Figure 1 and Figure 2 , when the valve assembly 400 includes a first three-way valve 410 and a second three-way valve 420, wherein the first three-way valve 410 is disposed on the first water supply pipeline, and one of the channels of the first three-way valve 410 is connected to the auxiliary heat exchange device 200; the second three-way valve 420 is disposed on the first water return pipeline, and one of the channels of the second three-way valve 420 is also connected to the auxiliary heat exchange device 200.

[0076] It should be noted that the three-way valve is divided into a confluence valve and a diversion valve according to the fluid action mode. The confluence valve has two inlets and flows out from one outlet after confluence. The diversion valve has one fluid inlet and flows out from two fluid outlets after diversion. For the first three-way valve 410, it has two inlets, one of which is connected to the heat pump device 100 through the first water supply pipe, and the other is connected to the auxiliary heat exchange device 200 through the second water supply pipe. The first three-way valve 410 also has one outlet, which is connected to the indoor heat exchange device 300. Therefore, the first three-way valve 410 is a confluence valve. For the second three-way valve 420, it has two outlets, one of which is connected to the heat pump device 100 through the first water return pipe, and the other is connected to the auxiliary heat exchange device 200 through the second water return pipe. The second three-way valve 410 also has one inlet, which is connected to the indoor heat exchange device 300. Therefore, the second three-way valve 410 is a diversion valve.

[0077] In some embodiments of the present application, the first three-way valve 410 includes three channels. Among them, the channel connected to the heat pump device 100 is the first inflow channel, the channel connected to the auxiliary heat exchange device 200 is the second inflow channel, and the channel connected to the indoor heat exchange device 300 is the first outflow channel; the second three-way valve 420 also includes three channels. Among them, the channel connected to the heat pump device 100 is the second outflow channel, the channel connected to the auxiliary heat exchange device 200 is the third outflow channel, and the channel connected to the indoor heat exchange device 300 is the third inflow channel. Among them, the states of the respective channels of the first three-way valve 410 and the second three-way valve 420 can be controlled separately, so that the water supply mode of the heat pump system can be conveniently changed.

[0078] It should be noted that for the first three-way valve 410 and the second three-way valve 420, the water flow rates of their three channels can be controlled separately to achieve different water supply modes. Exemplarily, when only the auxiliary heat exchange device 200 is needed to supply water to the indoor heat exchange device 300, only the channel of the first three-way valve 410 connected to the auxiliary heat exchange device 200 needs to be opened and the channel of the first three-way valve 410 connected to the heat pump device 100 needs to be closed, and the channel of the first three-way valve 410 connected to the indoor heat exchange device 300 needs to be opened; when only the heat pump device 100 is needed to supply water to the indoor heat exchange device 300, only the channel of the first three-way valve 410 connected to the auxiliary heat exchange device 200 needs to be closed and the channel of the first three-way valve 410 connected to the heat pump device 100 needs to be opened, and the channel of the first three-way valve 410 connected to the indoor heat exchange device 300 needs to be opened. And during the working process, the opening and closing states of the channels of the first three-way valve 410 and the opening and closing states of the channels of the second three-way valve 420 correspond to each other. Exemplarily, when only the auxiliary heat exchange device 200 is needed to supply water to the indoor heat exchange device 300, the channel of the first three-way valve 410 connected to the auxiliary heat exchange device 200 is in the open state while the channel of the first three-way valve 410 connected to the heat pump device 100 is in the closed state, and the channel of the first three-way valve 410 connected to the indoor heat exchange device 300 is also in the open state. At this time, the channel of the second three-way valve 420 connected to the auxiliary heat exchange device 200 is in the open state while the channel of the second three-way valve 420 connected to the heat pump device 100 is in the closed state, and the channel of the second three-way valve 420 connected to the indoor heat exchange device 300 is also in the open state, so that the auxiliary heat exchange device 200 and the indoor heat exchange device 300 form a circulating water circuit.

[0079] Refer to Figure 3, when the valve assembly 400 includes a first two-way valve 430 and a second two-way valve 440, the first two-way valve 430 can be arranged on the first water supply pipeline, and the second two-way valve 440 can be arranged on the second water supply pipeline; the first two-way valve 430 can control whether the hot water transmitted from the heat pump device 100 can be transmitted to the indoor heat exchange device 300 through the first water supply pipeline, and the second two-way valve 440 can control whether the hot water transmitted from the heat pump device 100 can be transmitted to the indoor heat exchange device 300 through the second water supply pipeline; when only the auxiliary heat exchange device 200 needs to be used to supply water to the indoor heat exchange device 300, only the first two-way valve 430 needs to be closed and the second two-way valve 440 needs to be opened, so that the hot water generated by the auxiliary heat exchange device 200 can be transmitted to the indoor heat exchange device 300; when only the heat pump device 100 needs to be used to supply water to the indoor heat exchange device 300, only the first two-way valve 430 needs to be opened and the second two-way valve 440 needs to be closed, so that the hot water generated by the heat pump device 100 can be transmitted to the indoor heat exchange device 300; through the above method, the control process of the valve assembly 400 can be made more simple and fast. Among them, the use of "first" and "second" to distinguish the first two-way valve 430 and the second two-way valve 440 does not mean that the two are different types of valve bodies, but only to more clearly explain the embodiments of the present application.

[0080] Refer to Figures 1 to 3 , the heat pump device 100 may further include two heat pumps, and there is a master-slave relationship between the two heat pumps; in the embodiments of the present application, the first heat pump 110 is used as the master heat pump, and the second heat pump 120 is used as the slave heat pump, and the two are also connected by a communication connection line, so that the first heat pump 110 can also control the second heat pump 120; in the process of using the heat pump device 100 to supply water to the indoor heat exchange device 300, the first heat pump 110 and the second heat pump 120 can work simultaneously, and the hot water generated by the first heat pump 110 and the second heat pump 120 can be converged, and then transmitted to the indoor heat exchange device 300 through the first water supply pipeline, and the cold water discharged from the indoor heat exchange device 300 can be transmitted to the first heat pump 110 and the second heat pump 120 respectively through the first water return pipeline; and the first heat pump 110 is also connected to a wired controller 130, so that the working states of the first heat pump 110 and the second heat pump 120 can be controlled by using the wired controller 130, making the control process of the entire heat pump device 100 more simple and fast.

[0081] It should be noted that the first heat pump 130 and the second heat pump 140 are not different types of heat pumps. The use of "first" and "second" for distinction is only to more clearly illustrate the embodiments of the present application. It can be understood that in the present application, taking the first heat pump 130 as the main heat pump does not mean that only the first heat pump 130 can be used as the main heat pump. In fact, the second heat pump 140 can also be used as the main heat pump, and only need to connect the line controller 130 to the second heat pump 140.

[0082] In some embodiments of the present application, the heat pump device 100 may further include multiple heat pumps, and the multiple heat pumps are controlled by the line controller 130. Then, by using the line controller 130, the multiple heat pumps can be controlled to achieve more efficient and stable water supply treatment. It should be noted that only an embodiment with two heat pumps is provided in the embodiments of the present application, and it should not be determined that the heat pump device 100 can only include two heat pumps.

[0083] In some embodiments of the present application, ball valves are also provided between the first heat pump 110 and the valve assembly 400 and between the second heat pump 120 and the valve assembly 400. By controlling the ball valves, the water supply pipeline of the heat pump device 100 can be further controlled.

[0084] In some embodiments of the present application, the fan coil unit 310 and the radiant panel 320 can be arranged in the same indoor space, for example, in the same room, or can be separately arranged in different indoor spaces, which is not limited here. And during the installation of the fan coil unit 310, the radiant panel 320 and the floor heating 340, the manifold 340 can be used for collective connection. The manifold 340 can collect and distribute the supply and return water, adjust and control the flow rate, and manually or automatically exhaust the air at this part. By using the manifold 340, different heat exchange devices can be collectively connected, which can well simplify the internal connection structure of the indoor heat exchange device 300.

[0085] Refer to Figure 4 , both the first heat pump 110 and the second heat pump 120 included in the heat pump device 100 include a water - fluorine heat exchanger 140, a water pump 150, and a heat pump pipeline. Among them, the heat pump pipeline is connected between the first water supply pipeline and the first water return pipeline. The water - fluorine heat exchanger 140 can heat the cold water input from the first water return pipeline, and the water pump 150 can convey the heated cold water to the first water supply pipeline so that the hot water can be conveyed from the first water supply pipeline to the indoor heat exchange device 300.

[0086] Refer to Figure 2 and Figure 3, a buffer water tank 500 may also be provided on the first return water pipeline, and the buffer water tank 500 may also be connected to the water inlet pipe of the auxiliary heat exchange device 200, and a make-up water valve 600 is also provided on the connecting pipeline; through the buffer water tank 500, the return water of the indoor heat exchange device 300 can be temporarily stored to adjust the water flow rate entering the heat pump device 100. When the water flow rate is insufficient, the make-up water valve 600 can be opened to replenish the buffer water tank 500, so as to adjust the water flow rate entering the heat pump device 100, and then the return water flow rate can be adjusted according to the performance of the heat pump device 100.

[0087] Refer to Figure 5 , Figure 5 is a flowchart of the control method of the heat pump system provided by the embodiment of the present application. The control method includes but is not limited to the following steps:

[0088] Step S100, receiving a valve switching instruction;

[0089] Step S200, controlling the valve assembly according to the valve switching instruction to adjust the water flow rate flowing from the second return water pipeline through the auxiliary heat exchange device to the second water supply pipeline.

[0090] In the embodiment of the present application, during the process of controlling the heat pump system, after the controller of the heat pump system receives the valve switching instruction, it can control the valve assembly in the heat pump system according to the received instruction, so that the water flow rate entering the indoor heat exchange device from the auxiliary heat exchange device changes.

[0091] Exemplarily, when the heat pump device of the heat pump system cannot work properly or the heat energy effect is poor under the influence of the external environment, it is necessary to use the auxiliary heat exchange device to supply hot water to the indoor heat exchange device. At this time, the heat pump system can automatically generate a valve switching instruction according to the current environment; then control the valve assembly according to the generated valve switching instruction to increase the water flow rate flowing from the auxiliary heat exchange device into the indoor heat exchange device, so as to use the auxiliary heat exchange device with higher heat production efficiency to supply water to the indoor heat exchange device, well making up for the energy efficiency deficiency of the heat pump device and ensuring the normal operation of the indoor heat exchange device, bringing a better user experience to the user.

[0092] Refer to Figure 6 , when increasing the water flow rate flowing from the second return water pipeline through the auxiliary heat exchange device to the second water supply pipeline, the valve switching instruction can be generated through but not limited to the following steps:

[0093] Step S110, obtaining the outdoor temperature;

[0094] Step S120, generating a valve switching instruction when the outdoor temperature is less than or equal to the outdoor set temperature.

[0095] In the embodiment of the present application, during the process of generating the valve switching instruction, the outdoor temperature can be used; when the outdoor temperature is less than or equal to the outdoor set temperature, the valve switching instruction can be generated. Exemplarily, the outdoor set temperature can be -15°C, and when the outdoor temperature is not greater than -15°C, the valve switching instruction can be generated.

[0096] Refer to Figure 7 , when increasing the water flow rate from the second return water pipeline to the second water supply pipeline through the auxiliary heat exchange device, the valve switching instruction can also be generated through but not limited to the following steps:

[0097] Step S130, obtain the water supply temperature of the indoor heat exchange device;

[0098] Step S140, when the water supply temperature is less than the set water supply temperature, generate the valve switching instruction.

[0099] In the embodiment of the present application, during the process of generating the valve switching instruction, the water supply temperature of the indoor heat exchange device can be used; when the water supply temperature of the indoor heat exchange device is less than the set water supply temperature, the valve switching instruction can be generated. Exemplarily, the set water supply temperature can be 15°C, and when the water supply temperature of the indoor heat exchange device is less than 15°C, the valve switching instruction can be generated.

[0100] Refer to Figure 8 , when increasing the water flow rate from the second return water pipeline to the second water supply pipeline through the auxiliary heat exchange device, the valve switching instruction can be generated through but not limited to the following steps:

[0101] Step S150, obtain the indoor temperature;

[0102] Step S160, when the indoor temperature is less than or equal to the indoor set temperature, generate the valve switching instruction.

[0103] In the embodiment of the present application, during the process of generating the valve switching instruction, the indoor temperature can be used; when the indoor temperature is less than or equal to the indoor set temperature, the valve switching instruction can be generated. Exemplarily, the indoor set temperature can be 20°C, and when the indoor temperature is not greater than 20°C, the valve switching instruction can be generated.

[0104] Refer to Figure 9 , when increasing the water flow rate from the second return water pipeline to the second water supply pipeline through the auxiliary heat exchange device, the valve switching instruction can be generated through but not limited to the following steps:

[0105] Step S170, obtain the current power of the heat pump device;

[0106] Step S180: When the current power is greater than or equal to the preset maximum power, generate a valve switching instruction.

[0107] In the embodiment of the present application, during the process of generating the valve switching instruction, the current power of the heat pump device can also be considered; when the current power of the heat pump device is not less than the preset maximum power, the valve switching instruction can also be generated.

[0108] In the embodiment of the present application, during the process of generating the valve switching instruction, any one or more of the outdoor temperature, the water supply temperature of the indoor heat exchange device, the indoor temperature, and the current power of the heat pump device can be considered; and the above preset parameters can all be set according to actual needs, so that the generation of the instruction can be more flexible.

[0109] It should be noted that the heat pump device is provided with a first temperature sensor to detect the outdoor temperature; a second temperature sensor is provided at the water inlet position of the indoor heat exchange device to detect the water supply temperature; the indoor heat exchange device is also provided with a third temperature sensor to detect the indoor temperature; the heat pump device is also provided with a power detector to detect and process the current power of the heat pump device.

[0110] Refer to Figure 10 The above step S200 may include but is not limited to the following steps:

[0111] Step S410: Obtain the current state of the auxiliary heat exchange device;

[0112] Step S420: When the current state of the auxiliary heat exchange device is the idle state, control the valve assembly according to the valve switching instruction;

[0113] Step S430: When the current state of the auxiliary heat exchange device is the working state, continue to use the heat pump device for heating until the auxiliary heat exchange device switches from the working state to the idle state, and then control the valve assembly according to the valve switching instruction.

[0114] In an embodiment of the present application, during the process of controlling the valve assembly based on the valve switching instruction, it is also necessary to obtain the current state of the auxiliary heat exchange device. The current state is the current operating state of the device, and the operating state may include an idle state and a working state. When the auxiliary heat exchange device is in the idle state, the valve assembly can be directly controlled according to the valve switching instruction. When the auxiliary heat exchange device is in the working state, it is necessary to enter a waiting state. During the waiting period, the heat pump device is maintained to heat the room, and the auxiliary heat exchange device is not temporarily used to heat the room. After the auxiliary heat exchange device switches from the working state to the idle state, the valve assembly can be controlled according to the valve switching instruction to heat the room using the auxiliary heat exchange device. Among them, the auxiliary heat exchange device in the embodiment of the present application can be a gas wall-mounted boiler, its working state is the hot water production state, and the idle state is the state of not being in the hot water production state.

[0115] Referring to Figure 11 , the valve assembly includes a first three-way valve. The first three-way valve includes a first inflow channel, a second inflow channel, and a first outflow channel. The first inflow channel is connected to the heat pump device, the second inflow channel is connected to the auxiliary heat exchange device, and the first outflow channel is connected to the indoor heat exchange device. The above step S200 may include but is not limited to the following steps:

[0116] Step S210, determining that the three-way valve is a on-off valve;

[0117] Step S220, controlling the conduction between the second inflow channel and the first outflow channel according to the valve switching instruction, and controlling the closing between the first inflow channel and the first outflow channel.

[0118] In an embodiment of the present application, when it is necessary to supply water to the indoor heat exchange device using the auxiliary heat exchange device, when the valve assembly is a three-way valve, it is necessary to control the three-way valve. When the three-way valve is an on-off valve, the second inflow channel connected to the auxiliary heat exchange device and the first outflow channel are controlled to conduct, and the first inflow channel connected to the heat pump device and the first outflow channel are controlled to close, so that only the auxiliary heat exchange is used to supply water to the indoor heat exchange device.

[0119] Referring to Figure 12 , the valve assembly includes a first three-way valve. The first three-way valve includes a first inflow channel, a second inflow channel, and a first outflow channel. The first inflow channel is connected to the heat pump device, the second inflow channel is connected to the auxiliary heat exchange device, and the first outflow channel is connected to the indoor heat exchange device. The above step S200 may also include but is not limited to the following steps:

[0120] Step S230, determining that the three-way valve is a proportional valve;

[0121] Step S240: According to the valve switching instruction, increase the valve opening degree between the second inflow channel and the first outflow channel, and decrease the valve opening degree between the first inflow channel and the first outflow channel.

[0122] In the embodiment of the present application, when the three-way valve is a proportional valve, the valve opening degree between the second inflow channel communicating with the auxiliary heat exchange device and the first outflow channel will be increased, and the valve opening degree between the first inflow channel communicating with the heat pump device and the first outflow channel will be decreased. Thus, the heat pump device and the auxiliary heat exchange device can be used to supply water to the indoor heat exchange device simultaneously to solve the problem of poor energy efficiency.

[0123] Refer to Figure 13 , when the three-way valve is a proportional valve, after step S240, it may further include but is not limited to the following steps:

[0124] Step S250: Determine that the three-way valve is a proportional valve;

[0125] Step S260: Determine the set outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and the water supply temperature.

[0126] In the embodiment of the present application, when the three-way valve is a proportional valve, the set outlet water temperature of the auxiliary heat exchange device can be determined according to the above-mentioned set water supply temperature and the water supply temperature; by controlling the three-way valve, the outlet water temperature of the auxiliary heat exchange device can reach the set outlet water temperature.

[0127] Refer to Figure 14 , when the valve assembly includes a first two-way valve and a second two-way valve, and the first two-way valve is arranged on the first water supply pipeline and the second two-way valve is arranged on the second water supply pipeline or the second return water pipeline, the above step S200 may further include but is not limited to the following steps:

[0128] Step S270: Open the second two-way valve according to the valve switching instruction;

[0129] Step S280: Close the first two-way valve according to the valve switching instruction.

[0130] In the embodiment of the present application, when the valve assembly includes a first two-way valve and a second two-way valve, the two two-way valves can be controlled separately to increase the water flow rate from the auxiliary heat exchange device to the indoor heat exchange device. At this time, only by opening the second two-way valve and closing the first two-way valve, the indoor heat exchange device can be supplied with water only by the auxiliary heat exchange device without using the heat pump device to supply water to the indoor heat exchange device. Using the auxiliary heat exchange device with high-efficiency heating for water supply treatment can well solve the problem of poor energy efficiency.

[0131] Refer to Figure 15, after the above step S200, the following steps may also be included but are not limited to:

[0132] Step S310, when the supply water temperature is greater than or equal to the set supply water temperature and the indoor temperature is greater than the indoor set temperature, control the auxiliary heat exchange device to stop making hot water and control the heat pump device to operate;

[0133] Step S320, control the valve assembly to reduce the water flow rate from the second return water pipeline through the auxiliary heat exchange device to the second water supply pipeline, and increase the water flow rate from the heat pump device to the first water supply pipeline.

[0134] In the embodiment of the present application, after using the auxiliary heat exchange device to supply water to the indoor heat exchange device, when the supply water temperature is not less than the set supply water temperature and the indoor temperature is greater than the indoor set temperature, the auxiliary heat exchange device can be controlled to stop making hot water and the heat pump device can be restarted, and the water flow rate flowing from the auxiliary heat exchange device into the indoor heat exchange device can be reduced, and the water flow rate flowing from the heat pump device to the indoor heat exchange device can be gradually increased to restore the state of mainly supplying water by the heat pump device.

[0135] The following provides specific embodiments to elaborate in detail the control method of the heat pump system in the embodiment of the present application.

[0136] Refer to Figure 16 , Figure 16 A control method of a heat pump system is provided, corresponding to Figure 1 the structural diagram of the heat pump system shown, where the three-way valve 4a is the Figure 1 first three-way valve 410 in Figure 1 , the three-way valve 4b is the

[0137] second three-way valve 420 in Figure 17 , 9a and 9b cycles are the circulating water paths of the auxiliary heat exchange device, T4 is the outdoor temperature, T10 is the supply water temperature entering the indoor heat exchange device, T1 is the indoor temperature, Ta is the set supply water temperature, and the auxiliary heat exchange device is a wall-mounted boiler; when the outdoor temperature is less than the preset outdoor temperature or the supply water temperature is greater than the set supply water temperature or the outdoor unit has not reached the maximum power or the indoor set temperature is less than the indoor temperature, only the outdoor heat pump device will be used for hot water supply treatment; when the outdoor temperature is greater than or equal to the preset outdoor temperature or the supply water temperature is less than or equal to the set supply water temperature or the outdoor unit reaches the maximum power or the indoor set temperature is greater than or equal to the indoor temperature, the channel switching process will be performed on the three-way valves 4a and 4b so that the wall-mounted boiler can supply hot water to the indoor heat exchange device. And before controlling the switching of the three-way valve, it is also necessary to determine that the wall-mounted boiler is not in the state of preparing domestic hot water. Figure 17 A control method of a heat pump system is provided, corresponding to Figure 3The structural diagram of the heat pump system shown, where the two-way valve 4c is the Figure 3 first two-way valve 430 in Figure 3 , the two-way valve 4d is the

[0138] second two-way valve 440 in Figure 18 . T4 is the outdoor temperature, T9 is the water supply temperature of the heat pump device, T1 is the indoor temperature, Ta is the set water supply temperature, and the auxiliary heat exchange device is a wall-mounted boiler; when the outdoor temperature is less than the preset outdoor temperature or the water supply temperature is greater than the set water supply temperature or the outdoor unit has not reached the maximum power or the indoor set temperature is less than the indoor temperature, only the outdoor heat pump device will be used for hot water supply treatment; when the outdoor temperature is greater than or equal to the preset outdoor temperature or the water supply temperature is less than or equal to the set water supply temperature or the outdoor unit reaches the maximum power or the indoor set temperature is greater than or equal to the indoor temperature, the two-way valves 4c and 4d will be controlled for switching to enable the wall-mounted boiler to supply hot water to the indoor heat exchange device. And before controlling the switching of the two-way valve, it is also necessary to determine that the wall-mounted boiler is not in the state of preparing domestic hot water. And when the water supply temperature is greater than the set water supply temperature and the indoor temperature is less than or equal to the set indoor temperature, the wall-mounted boiler will be controlled to stop preparing hot water, and the two-way valves 4c and 4d will be re-controlled for switching to re-use the heat pump device for water supply treatment. Figure 18 Referring to Figure 2 Figure 2 , a control method for a heat pump system is provided, corresponding to the structural diagram of the heat pump system shown, where the three-way valve 4b is the

[0139] first three-way valve 410 in Figure 19The embodiment of the present application also provides a controller 700, including a memory 720, a processor 710, and a computer program stored in the memory 720 and executable on the processor. When the processor 710 executes the computer program, the control method of the heat pump system as described above is implemented.

[0140] Reference Figure 19 , taking the example that the processor 710 and the memory 720 in the controller 700 can be connected via a bus. The 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. In addition, the memory 720 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk memory, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 720 may optionally include a memory remotely arranged relative to the processor 710, and these remote memories may be connected to the controller 700 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0141] Those skilled in the art will understand that Figure 19 The device structure shown in the figure does not constitute a limitation on the controller 700, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0142] In addition, the embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the control method of the heat pump system described above, for example, Figure 19 The one or more processors 710 may execute the air conditioning control method in the above method embodiment, for example, executing the above described Figure 5 Steps S100 to S200 of the method, Figure 6 Steps S110 to S120 of the method, Figure 7 Steps S130 to S140 of the method, Figure 8 Steps S150 to S160 of the method, Figure 9 Steps S170 to S180 of the method, Figure 10 Steps S410 to S430 of the method, Figure 11 Steps S210 to S220 of the method, Figure 12 Steps S230 to S240 of the method, Figure 13 Steps S250 to S260 of the method, Figure 14 Steps S270 to S280 of the method and Figure 15 Method steps S310 to S320.

[0143] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed to multiple network values. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0144] Those of ordinary skill in the art can understand that all or some of the steps and systems disclosed above can be implemented as software, firmware, hardware, and their appropriate combinations. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer-readable storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer-readable storage medium 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-readable storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory, or other memory technologies, CD-ROM, digital versatile disk (DVD), or other optical disk storage, magnetic cassette, tape, magnetic disk storage, or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, a communication medium typically contains computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0145] The above is a specific description of the preferred embodiment of this application, but this application is not limited to the above implementation manner. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of this application, and these equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A heat pump system, characterized in that, comprising: an indoor heat exchange device; a heat pump unit, connected to the water inlet of the indoor heat exchange device through a first water supply pipeline, and connected to the water outlet of the indoor heat exchange device through a first water return pipeline; an auxiliary heat exchange device, connected to the first water supply pipeline through a second water supply pipeline, and connected to the first water return pipeline through a second water return pipeline; a valve assembly, arranged on the second water supply pipeline and / or the second water return pipeline, and the valve assembly is used to adjust the water flow rate flowing from the second water return pipeline through the auxiliary heat exchange device to the second water supply pipeline.

2. The heat pump system according to claim 1, characterized in that, the valve assembly is further arranged on the first water supply pipeline and / or the first water return pipeline.

3. The heat pump system according to claim 2, characterized in that, the valve assembly includes a first three-way valve and a second three-way valve. The first three-way valve is arranged on the first water supply pipeline and is connected to the auxiliary heat exchange device through the second water supply pipeline. The second three-way valve is arranged on the first water return pipeline and is connected to the auxiliary heat exchange device through the second water return pipeline.

4. The heat pump system according to claim 3, characterized in that, the first three-way valve includes a first inflow channel, a second inflow channel and a first outflow channel. The first inflow channel is connected to the heat pump unit, the second inflow channel is connected to the auxiliary heat exchange device, and the first outflow channel is connected to the indoor heat exchange device; the second three-way valve includes a third inflow channel, a second outflow channel and a third outflow channel. The third inflow channel is connected to the indoor heat exchange device, the second outflow channel is connected to the heat pump unit, and the third outflow channel is connected to the auxiliary heat exchange device.

5. The heat pump 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 arranged on the first water supply pipeline, and the second two-way valve is arranged on the second water supply pipeline.

6. The heat pump system according to any one of claims 1 to 5, characterized in that, the heat pump unit includes a line controller and multiple heat pump machines. The line controller is communicatively connected to the multiple heat pump machines. The multiple heat pump machines are all connected to the water inlet of the indoor heat exchange device through the first water supply pipeline, and are all connected to the water outlet of the indoor heat exchange device through the first water return pipeline.

7. The heat pump system according to claim 6, characterized in that, each heat pump machine is provided with a water-to-fluorine heat exchanger, a water pump and a heat pump pipeline. The water-to-fluorine heat exchanger and the water pump are both arranged on 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 water return pipeline.

8. The heat pump system according to any one of claims 1 to 5, characterized in that, the indoor heat exchange device includes at least one of the following: fan coil unit, radiant panel, floor heating.

9. The heat pump system according to any one of claims 1 to 5, characterized in that, The heat pump system further includes a buffer water tank, a make-up water valve, and a water inlet pipe. The buffer water tank is arranged on the first return water pipeline. The water inlet pipe is communicated with the buffer water tank, and the make-up water valve is arranged on the water inlet pipe.

10. A control method for a heat pump system, characterized in that, applied to the heat pump system according to any one of claims 1 to 9, the control method includes: Receiving a valve switching instruction; Controlling the valve assembly according to the valve switching instruction to adjust the water flow rate flowing from the second return water pipeline through the auxiliary heat exchange device to the second water supply pipeline.

11. The control method for a heat pump system according to claim 10, characterized in that, The controlling the valve assembly according to the valve switching instruction includes: Obtaining the current state of the auxiliary heat exchange device; When the current state of the auxiliary heat exchange device is an idle state, controlling the valve assembly according to the valve switching instruction; When the current state of the auxiliary heat exchange device is a working state, maintaining heating by using the heat pump device until the auxiliary heat exchange device is switched from the working state to the idle state, and then controlling the valve assembly according to the valve switching instruction.

12. The control method according to claim 10, characterized in that, In the case of increasing the water flow rate flowing from the second return water pipeline through the auxiliary heat exchange device to the second water supply pipeline, the valve switching instruction is generated through at least one of the following steps: Obtaining the outdoor temperature, and generating the valve switching instruction when the outdoor temperature is less than or equal to the outdoor set temperature; Obtaining the water supply temperature of the indoor heat exchange device, and generating the valve switching instruction when the water supply temperature is less than the set water supply temperature; Obtaining the indoor temperature, and generating the valve switching instruction when the indoor temperature is less than or equal to the indoor set temperature; Obtaining the current power of the heat pump device, and generating the valve switching instruction when the current power is greater than or equal to the preset maximum power.

13. The control method according to claim 12, characterized in that, The valve assembly includes a first three-way valve. The first three-way valve includes a first inflow channel, a second inflow channel, and a first outflow channel. The first inflow channel is communicated with the heat pump device, the second inflow channel is communicated with the auxiliary heat exchange device, and the first outflow channel is communicated with the indoor heat exchange device. The controlling the valve assembly according to the valve switching instruction includes one of the following: When the three-way valve is an on-off valve, controlling the second inflow channel and the first outflow channel to be conducted according to the valve switching instruction, and controlling the first inflow channel and the first outflow channel to be closed; When the three-way valve is a proportional valve, increasing the valve opening degree between the second inflow channel and the first outflow channel according to the valve switching instruction, and reducing the valve opening degree between the first inflow channel and the first outflow channel.

14. The control method according to claim 13, characterized in that, The control method further includes: When the three-way valve is a proportional valve, determine the set outlet temperature of the auxiliary heat exchange device according to the set water supply temperature and the water supply temperature.

15. The control method according to claim 12, wherein, the valve assembly includes a first two-way valve and a second two-way valve. The first two-way valve is arranged on the first water supply pipeline, and the second two-way valve is arranged on the second water supply pipeline or the second water return pipeline; controlling the valve assembly according to the valve switching instruction includes: opening the second two-way valve and closing the first two-way valve according to the valve switching instruction.

16. The control method according to any one of claims 12 to 15, wherein, after controlling the valve assembly according to the valve switching instruction, 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 indoor set temperature, controlling the auxiliary heat exchange device to stop making hot water and controlling the heat pump device to operate, and controlling the valve assembly to reduce the water flow rate from the second water return pipeline through the auxiliary heat exchange device to the second water supply pipeline, and increase the water flow rate from the heat pump device to the first water supply pipeline.

17. A controller, wherein, it includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the control method of the heat pump system according to any one of claims 10 to 16.

18. A computer-readable storage medium, wherein, it stores computer-executable instructions for executing the control method of the heat pump system according to any one of claims 10 to 16.

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