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, a control method of the heat pump water system, a controller and a computer readable storage medium. 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 buffer water tank is arranged on the first water supply pipeline and / or the first water return pipeline; and the auxiliary heat exchange equipment is communicated to the buffer water tank through a second water return pipeline and a second water supply pipeline. According to the heat pump water system, combustion and heat complementation can be achieved through the heat pump device and the auxiliary heat exchange equipment, and therefore the problem that the effect of an independent heat pump device is poor can be solved, and the heating effect of the heat pump water system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and particularly relates to a heat pump water system, a control method thereof, a controller, and a computer-readable storage medium. Background Art

[0002] In the related art, an existing air source heat pump heats the indoor space by absorbing heat from outdoor air and going through processes of compression, heat transfer, and heat release. However, under extreme temperature conditions, it is difficult for an existing single air source heat pump to constantly maintain the indoor temperature required, resulting in poor heating effect. Summary of the Invention

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present application provides a heat pump water system, a control method thereof, a controller, and a computer-readable storage medium, aiming to improve the problem of poor effect of a single heat pump device and enhance the heating effect of the heat pump water system.

[0004] In a first aspect, an embodiment of the present application provides a heat pump water system, including: an indoor heat exchange device; a heat pump device 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; a buffer water tank disposed in the first water supply pipeline and / or the first water return pipeline; and an auxiliary heat exchange device connected to the buffer water tank through a second water return pipeline and a second water supply pipeline.

[0005] According to some embodiments of the present application, when the buffer water tank is disposed in both the first water supply pipeline and the first water return pipeline, the heat pump water system further includes a first water pump disposed in the first water supply pipeline between the buffer water tank and the indoor heat exchange device.

[0006] According to some embodiments of the present application, the indoor heat exchange device includes at least one of the following: a fan coil unit, a radiant panel, and a floor heating system.

[0007] According to some embodiments of the present application, the heat pump water system further includes a manifold, and both the first water supply pipeline and the first water return pipeline are connected to the indoor heat exchange device through the manifold.

[0008] According to some embodiments of the present application, the heat pump device is provided with a water-to-fluorine heat exchanger, a second water pump, and a heat pump pipeline. The water-to-fluorine heat exchanger and the second water pump are both disposed in the heat pump pipeline, and 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.

[0009] According to some embodiments of the present application, one or more heat pump devices are provided. When there are multiple heat pump devices, the multiple heat pump devices are connected through the first water supply pipeline and the first water return pipeline.

[0010] According to some embodiments of the present application, the heat pump water system further includes a make-up water valve and a water inlet pipe. The water inlet pipe is connected to the buffer water tank, and the make-up water valve is arranged on the water inlet pipe.

[0011] According to some embodiments of the present application, the heat pump water system further includes a water outlet pipe. The water inlet pipe is connected to the water outlet pipe through the auxiliary heat exchange device.

[0012] In a second aspect, an embodiment of the present application further provides a control method for a heat pump water system, which is applied to the heat pump water system as described in the first aspect. The control method includes: receiving a complementary start instruction; starting the auxiliary heat exchange device according to the complementary start instruction to heat the water in the buffer water tank.

[0013] According to some embodiments of the present application, the complementary start instruction is generated through at least one of the following steps: obtaining the outdoor temperature, and generating the complementary start 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 complementary start instruction when the water supply temperature is less than the set water supply temperature; obtaining the indoor temperature, and generating the complementary start 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 complementary start instruction when the current power is greater than or equal to the preset maximum power.

[0014] According to some embodiments of the present application, after starting the auxiliary heat exchange device according to the complementary start instruction, the control method further includes: determining the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and the preset compensation temperature; controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time.

[0015] According to some embodiments of the present application, when the buffer water tank is arranged on the first water return pipeline, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the control method further includes: obtaining the return water temperature of the heat pump device; when the sum of the return water temperature and the preset energy demand temperature of the indoor heat exchange device is greater than or equal to the set water supply temperature, determining the first temperature difference between the water supply temperature and the return water temperature, and determining the second temperature difference between the set water supply temperature and the water supply temperature; controlling the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference.

[0016] According to some embodiments of the present application, when the buffer water tank is arranged on the first water supply pipeline and the first water return pipeline, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the control method further includes: obtaining the return water temperature of the heat pump device; when the second temperature difference between the set water supply temperature and the water supply temperature is less than a first preset threshold, increasing the target outlet water temperature of the auxiliary heat exchange device; determining a first temperature difference between the water supply temperature and the return water temperature, and controlling the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference.

[0017] According to some embodiments of the present application, controlling the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference includes: when the first temperature difference is greater than or equal to a preset temperature difference and the second temperature difference is less than zero, reducing the outlet water temperature of the auxiliary heat exchange device or controlling the auxiliary heat exchange device to stop making hot water.

[0018] According to some embodiments of the present application, when the buffer water tank is arranged on the first water supply pipeline, determining the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and a preset compensation temperature includes at least one of the following: when the second temperature difference between the set water supply temperature and the water supply temperature is greater than a second preset threshold, determining the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and a first preset compensation temperature; when the second temperature difference between the set water supply temperature and the water supply temperature is between zero and the second preset threshold, determining the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and a second preset compensation temperature, where the second preset compensation temperature is less than the first preset compensation temperature.

[0019] According to some embodiments of the present application, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the control method further includes: when the water supply temperature is greater than the set water supply temperature, reducing the outlet water temperature of the auxiliary heat exchange device or controlling the auxiliary heat exchange device to stop making hot water.

[0020] 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, where when the processor runs the computer program, it executes the control method of the heat pump water system as described in the second aspect above.

[0021] 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 water system as described in the second aspect above.

[0022] According to the technical solution of the embodiment of the present application, it has at least the following beneficial effects: The embodiment of the present application includes an indoor heat exchange device, a heat pump device, a buffer water tank, and an auxiliary heat exchange device. Among them, the heat pump device 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; the buffer water tank is arranged on the first water supply pipeline and / or the first water return pipeline; the auxiliary heat exchange device is connected to the buffer water tank through a second water return pipeline and a second water supply pipeline. The embodiment of the present application can achieve complementary combustion heat through the heat pump device and the auxiliary heat exchange device. Therefore, it can solve the problem that the effect of a single heat pump device is not good, thereby improving the heating effect of the heat pump water system.

[0023] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Description of the Drawings

[0024] The drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

[0025] Figure 1 It is a schematic structural diagram of a heat pump water system provided by an embodiment of the present application;

[0026] Figure 2 It is a schematic structural diagram of a heat pump water system provided by another embodiment of the present application;

[0027] Figure 3 It is a schematic structural diagram of a heat pump water system provided by another embodiment of the present application;

[0028] Figure 4 It is a schematic structural diagram of a heat pump device in a heat pump water system provided by an embodiment of the present application;

[0029] Figure 5 It is a flowchart of a control method for a heat pump water system provided by an embodiment of the present application;

[0030] Figure 6 It is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application;

[0031] Figure 7 It is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application;

[0032] Figure 8 It is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application;

[0033] Figure 9It is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application;

[0034] Figure 10 It is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application;

[0035] Figure 11 It is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application;

[0036] Figure 12 It is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application;

[0037] Figure 13 It is a schematic structural diagram of a controller for executing a control method provided by an embodiment of the present application. Detailed Description of the Embodiment

[0038] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where 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 only for explaining the present application and should not be construed as limiting the present application.

[0039] In the description of the present application, it should be understood that with regard to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present application.

[0040] In the description of the present application, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood not to include the present number, and above, below, within, etc. are understood to include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not 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.

[0041] In the description of the present application, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0042] In some cases, existing air source heat pumps provide heating for indoor spaces by absorbing heat from outdoor air and going through processes of compression, heat transfer, and heat release. However, under extreme temperature conditions, it is difficult for existing standalone air source heat pumps to constantly maintain the indoor temperature required, resulting in poor heating performance.

[0043] Based on the above situation, embodiments of the present application propose a heat pump water system, its control method, a controller, and a computer-readable storage medium, aiming to improve the problem of poor performance of standalone heat pump devices and enhance the heating effect of the heat pump water system.

[0044] The following further elaborates on each embodiment of the heat pump water system of the present application in conjunction with the accompanying drawings.

[0045] As Figure 1 shown, Figure 1 is a schematic structural diagram of a heat pump water system provided by an embodiment of the present application.

[0046] In one embodiment, the heat pump water system of the embodiments of the present application includes, but is not limited to, an indoor heat exchange device 100, a heat pump device 200, a buffer water tank 300, and an auxiliary heat exchange device 400. Among them, the heat pump device 200 is connected to the water inlet of the indoor heat exchange device 100 through a first water supply pipeline and is connected to the water outlet of the indoor heat exchange device 100 through a first water return pipeline; the buffer water tank 300 is arranged on the first water return pipeline; the auxiliary heat exchange device 400 is connected to the buffer water tank 300 through a second water return pipeline and a second water supply pipeline. The embodiments of the present application can achieve complementary combustion and heat through the heat pump device 200 and the auxiliary heat exchange device 400. Therefore, the problem of poor performance of the standalone heat pump device 200 can be solved, thereby enhancing the heating effect of the heat pump water system.

[0047] It should be noted that under extreme temperature conditions, the supply water temperature may not reach the set supply water temperature. However, the embodiments of the present application can achieve complementary combustion and heat through the heat pump device 200 and the auxiliary heating device 400, so that the supply water temperature reaches the set supply water temperature. Therefore, the problem of poor performance of the standalone heat pump device 200 can be solved, thereby enhancing the heating effect of the heat pump water system.

[0048] As Figure 2 shown, Figure 2 is a schematic structural diagram of a heat pump water system provided by another embodiment of the present application.

[0049] In one embodiment, the buffer water tank 300 in the heat pump water system of the embodiments of the present application is arranged on the first water supply pipeline and the first water return pipeline.

[0050] Specifically, the heat pump water system of the embodiment of the present application further includes a first water pump 500, wherein the first water pump 500 is arranged on the first water supply pipeline between the buffer water tank 300 and the indoor heat exchange device 100.

[0051] It should be noted that the first water pump 500 is arranged in the first water supply pipeline between the buffer water tank 300 and the indoor heat exchange device 100 to increase the lift, so as to ensure that the water can flow evenly in the first water supply pipeline, avoid dead angles or sharp turns, and thus improve the heat exchange efficiency; in addition, the first water pump 500 can adjust the water supply flow according to the needs of the heat pump water system to ensure that the water supply temperature is within the set temperature range, thereby improving the heating effect of the heat pump water system.

[0052] It can be understood that the first water pump 500 can be a secondary water pump. By arranging a secondary water pump in the first water supply pipeline between the buffer water tank 300 and the indoor heat exchange device 100, the lift can be increased to ensure that the water can flow evenly in the first water supply pipeline, avoid dead angles or sharp turns, and thus improve the heat exchange efficiency; in addition, the secondary water pump can adjust the water supply flow according to the needs of the heat pump water system to ensure that the water supply temperature is within the set temperature range. The embodiment of the present application does not make specific limitations on the first water pump 500.

[0053] As Figure 3 shown, Figure 3 is a schematic structural diagram of a heat pump water system provided by another embodiment of the present application.

[0054] In one embodiment, the buffer water tank 300 in the heat pump water system of the embodiment of the present application is arranged on the first water supply pipeline.

[0055] Specifically, as Figure 1 , Figure 2 and Figure 3 shown, the indoor heat exchange device 100 includes a fan coil 110, a radiation panel 120 and a floor heating 130.

[0056] It can be understood that the heat pump device 200 and the auxiliary heat exchange device 400 can realize complementary combustion heat, so as to improve the heating comfort of the fan coil 110, the radiation panel 120 and the floor heating 130, and can solve the problem of poor effect of the single heat pump device 200, thereby improving the heating effect of the heat pump water system.

[0057] Specifically, the heat pump water system further includes a manifold 600, wherein both the first water supply pipeline and the first water return pipeline are connected to the indoor heat exchange device 100 through the manifold 600.

[0058] It can be understood that the manifold 600 is used for the hydraulic distribution of the heat pump water system. According to the actual situation, there can be multiple manifolds 600, and the embodiment of the present application does not make specific limitations.

[0059] Specifically, as Figure 4 shown, Figure 4 is a schematic structural diagram of a heat pump device in a heat pump water system provided by an embodiment of the present application.

[0060] In one embodiment, the heat pump device 200 of the heat pump water system includes, but is not limited to, a water-fluorine heat exchanger 210, a water supply pump 220, and a heat pump pipeline. Both the water-fluorine heat exchanger 210 and the water supply pump 220 are arranged on the heat pump pipeline. One end of the heat pump pipeline is the above-mentioned water supply port, and the other end is the above-mentioned return water port.

[0061] 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 the return water pipeline forms another circulation loop using water as the refrigerant. Among them, the second heat exchange coil and the third heat exchange coil are not connected, and heat exchange can occur between the second heat exchange coil and the third heat exchange coil.

[0062] Specifically, the number of heat pump devices 200 can be set to one or multiple.

[0063] It can be understood that when the number of heat pump devices 200 is set to multiple, the multiple heat pump devices 200 are connected through a first water supply pipeline and a first return water pipeline.

[0064] Specifically, as Figure 1 , Figure 2 and Figure 3 shown, the heat pump water system further includes a makeup water valve 700 and a water inlet pipe. Among them, the water inlet pipe is connected to the buffer water tank 300, and the makeup water valve 700 is arranged on the water inlet pipe.

[0065] It can be understood that the above-mentioned buffer water tank 300 is a device for storing water, mainly balancing the pressure and flow rate changes of the water in the system by storing water. When the pressure of the heat pump water system increases, water will enter the buffer water tank 300, and when the pressure of the heat pump water system decreases, the water stored in the buffer water tank 300 will re-enter the system, thereby maintaining the balance of the heat pump water system. And by adjusting the makeup water valve 700, the water in the buffer water tank 300 can enter the auxiliary heat exchange device 400 through the water inlet pipe, so that the auxiliary heat exchange device 400 can produce domestic hot water.

[0066] Specifically, the heat pump water system further includes a water outlet pipe. Among them, the water inlet pipe is connected to the water outlet pipe through the auxiliary heat exchange device 400.

[0067] It should be noted that by adjusting the water replenishing valve 700, the water in the buffer water tank 300 can flow through the water inlet pipe to the auxiliary heat exchange device 400, so that the auxiliary heat exchange device 400 prepares domestic hot water and discharges the domestic hot water through the water outlet pipe for the living needs of users.

[0068] It should be noted that when the water in the buffer water tank 300 flows to the auxiliary heat exchange device 400 through the second return water pipeline, the auxiliary heat exchange device 400 can produce hot water, so that the auxiliary heat exchange device 400 and the heat pump device 200 achieve complementary combustion heat, and then the water supply temperature reaches the set water supply temperature. Therefore, the problem of poor effect of the single heat pump device 200 can be solved, and the heating effect of the heat pump water system can be improved.

[0069] It should be noted that when the auxiliary heat exchange device 400 produces domestic hot water, the heat pump water system keeps the heat pump device 200 working. After the auxiliary heat exchange device 400 finishes producing domestic hot water, it enters the complementary combustion heat process, and the auxiliary heat exchange device 400 produces hot water, so that the water supply temperature reaches the set water supply temperature. Therefore, the problem of poor effect of the single heat pump device 200 can be solved, and the heating effect of the heat pump water system can be improved.

[0070] It can be understood that the above-mentioned auxiliary heat exchange device 400 can be a gas heating device or an electric heater, and the embodiments of the present application do not make specific limitations.

[0071] It can be understood that the number of the above-mentioned indoor heat exchange devices 100 can be two, three, or more, and the embodiments of the present application do not make specific limitations.

[0072] It should be noted that regarding the installation position of the above-mentioned indoor heat exchange devices, multiple indoor heat exchange devices can be installed in the same space area. For example, multiple indoor heat exchange devices can be installed in a room at the same time, or multiple indoor heat exchange devices can be installed in a living room at the same time; in addition, multiple indoor heat exchange devices can also be installed in different space areas. For example, some indoor heat exchange devices are installed in a room, and some other indoor heat exchange devices are installed in a living room, or some indoor heat exchange devices are installed in a first room, and some other indoor heat exchange devices are installed in a second room. Regarding the installation position of the above-mentioned indoor heat exchange devices, the embodiments of the present application do not make specific limitations.

[0073] It should be noted that regarding the installation position of the indoor heat exchange device in the space area, the embodiments of the present application can install the indoor heat exchange device at the ceiling position of the room, or install the indoor heat exchange device at the floor position of the room, or reasonably allocate the installation position of the indoor heat exchange device according to actual use needs. The embodiments of the present application do not make specific limitations.

[0074] In addition, it should be noted that regarding the equipment type of the above indoor heat exchange equipment, it can be the air handling unit terminal formed by matching with a fan coil unit, or the radiant terminal formed by matching with a radiant panel, such as the radiant panel on the ceiling or the floor heating, or it can be other types of terminal equipment. The embodiments of the present application do not make specific limitations thereto.

[0075] Based on the structures of the heat pump water systems in the above respective embodiments, the respective embodiments of the control method of the heat pump water system of the present application are respectively proposed below.

[0076] As Figure 5 shown, Figure 5 FIG. is a flowchart of the control method of the heat pump water system provided by an embodiment of the present application. This control method can be applied to the above heat pump water system and can include but is not limited to steps S110 to S120.

[0077] Step S110: Receive a complementary start instruction;

[0078] Step S120: Start the auxiliary heat exchange equipment according to the complementary start instruction to heat the water in the buffer water tank.

[0079] In an embodiment, after receiving the complementary start instruction, the auxiliary heat exchange equipment is turned on according to the complementary start instruction, so that the auxiliary heat exchange equipment heats the water flowing into it from the buffer water tank through the second return water pipeline.

[0080] It should be noted that by starting the auxiliary heat exchange equipment to heat the water in the buffer water tank, the heat pump device and the buffer water tank can achieve complementary combustion heat, so that the problem of poor effect of a single heat pump device can be solved, thereby improving the heating effect of the heat pump water system.

[0081] Specifically, the complementary start instruction is generated through at least one of the following situations:

[0082] The first situation: Obtain the outdoor temperature. When the outdoor temperature is less than or equal to the outdoor set temperature, generate a complementary start instruction;

[0083] The second situation: Obtain the water supply temperature of the indoor heat exchange equipment. When the water supply temperature is less than the set water supply temperature, generate a complementary start instruction;

[0084] The third situation: Obtain the indoor temperature. When the indoor temperature is less than or equal to the indoor set temperature, generate a complementary start instruction;

[0085] The fourth situation: Obtain the current power of the heat pump device. When the current power is greater than or equal to the preset maximum power, generate a complementary start instruction.

[0086] In one embodiment, a complementary start instruction is generated when the acquired outdoor temperature is less than or equal to the outdoor set temperature; alternatively, a complementary start instruction is generated when the water supply temperature of the indoor heat exchange device is less than the set water supply temperature; alternatively, a complementary start instruction is generated when the acquired indoor temperature is less than or equal to the indoor set temperature; alternatively, a complementary start instruction is generated when the current power of the heat pump device is greater than or equal to the preset maximum power.

[0087] It should be noted that when at least one of the above situations occurs in the acquired outdoor temperature, the water supply temperature of the indoor heat exchange device, the indoor temperature, and the current power of the heat pump device, a complementary start instruction will be generated. Thus, according to the complementary start instruction, the water in the buffer water tank flows from the second return water pipeline to the auxiliary heat exchange device, and then the auxiliary heat exchange device is started to generate hot water, and the heated water flows back to the buffer water tank from the second water supply pipeline. Therefore, through the auxiliary heat exchange device and the heat pump device, combustion heat complementarity is achieved, so that the water supply temperature reaches the set water supply temperature, solving the problem of poor performance of a single heat pump device, and thus improving the heating effect of the heat pump water system.

[0088] Specifically, as Figure 6 shown, Figure 6 is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application. After starting the auxiliary heat exchange device according to the complementary start instruction, the control method may further include, but is not limited to, steps S210 to S220.

[0089] Step S210: Determine the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and the preset compensation temperature;

[0090] Step S220: Control the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time.

[0091] In one embodiment, after starting the auxiliary heat exchange device according to the complementary start instruction, determine the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and the preset compensation temperature, and control the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time.

[0092] It should be noted that the preset compensation temperature and the preset time can be set according to actual needs and are fixed values, which are not specifically limited in the embodiments of the present application.

[0093] It should be noted that controlling the auxiliary heat exchange device to operate at the target outlet water temperature can increase the return water temperature flowing from the first return water pipeline to the heat pump device, thereby increasing the water supply temperature flowing from the first water supply pipeline to the indoor heat exchange device by the heat pump device. Therefore, through the heat pump device and the auxiliary heat exchange device, combustion heat complementarity is achieved, and thus the problem of poor performance of a single heat pump device can be solved, and the heating effect of the heat pump water system can be improved.

[0094] Specifically, as Figure 7 shown, Figure 7 is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application. When the buffer water tank is arranged on the first return water pipeline, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the control method further includes but is not limited to steps S310 to S330.

[0095] Step S310: Obtain the return water temperature of the heat pump device;

[0096] Step S320: When the sum of the return water temperature and the preset energy demand temperature of the indoor heat exchange device is greater than or equal to the set supply water temperature, determine the first temperature difference between the supply water temperature and the return water temperature, and determine the second temperature difference between the set supply water temperature and the supply water temperature.

[0097] Step S330: Control the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference.

[0098] In one embodiment, the buffer water tank is arranged in the first return water pipeline. After controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the return water temperature of the heat pump device is detected. Then, the sum of the obtained return water temperature and the preset energy demand temperature of the indoor heat exchange device is compared with the set supply water temperature. When the sum of the obtained return water temperature and the preset energy demand temperature of the indoor heat exchange device is greater than or equal to the set supply water temperature, determine the first temperature difference according to the supply water temperature and the return water temperature, and determine the second temperature difference according to the set supply water temperature and the supply water temperature. Then, control the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference.

[0099] It should be noted that the preset energy demand temperature can be set according to actual needs, which is a fixed value and can be the temperature difference between the supply water temperature and the return water temperature. The embodiments of the present application do not make specific limitations.

[0100] It should be noted that the operating state of the auxiliary heat exchange device is controlled according to the first temperature difference and the second temperature difference. Therefore, it is possible to reduce energy consumption, improve energy efficiency, and reduce heating costs while maintaining indoor comfort.

[0101] Specifically, as Figure 8 shown, Figure 8 is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application. When the buffer water tank is arranged on the first supply water pipeline and the first return water pipeline, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the control method further includes but is not limited to steps S410 to S430.

[0102] Step S410: Obtain the return water temperature of the heat pump device;

[0103] Step S420: When the second temperature difference between the set water supply temperature and the water supply temperature is greater than or equal to the first preset threshold, increase the target outlet water temperature of the auxiliary heat exchange device;

[0104] Step S430: Determine the first temperature difference between the water supply temperature and the return water temperature, and control the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference.

[0105] In an embodiment, the buffer water tank is arranged on the first water supply pipeline and the first return water pipeline. After controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the return water temperature of the heat pump device is detected; then, when the second temperature difference between the set water supply temperature and the water supply temperature is greater than or equal to the first preset threshold, the target outlet water temperature of the auxiliary heat exchange device is increased; then, the first temperature difference is determined according to the water supply temperature and the return water temperature, and the operating state of the auxiliary heat exchange device is controlled according to the first temperature difference and the second temperature difference.

[0106] It should be noted that when the second temperature difference between the set water supply temperature and the water supply temperature is greater than or equal to the first preset threshold, that is, the set water supply temperature and the water supply temperature differ greatly. Therefore, by increasing the target outlet water temperature of the auxiliary heat exchange device, the water supply temperature can be increased faster, and then the water supply temperature can reach the set temperature.

[0107] It should be noted that the first preset threshold can be set according to actual needs and is a fixed value, which is not specifically limited in the embodiments of the present application.

[0108] Specifically, regarding controlling the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference in the above steps S330 and S430, the control method of the heat pump water system further includes the following situations:

[0109] The first situation: When the first temperature difference is greater than or equal to the preset temperature difference and the second temperature difference is less than zero, reduce the outlet water temperature of the auxiliary heat exchange device or control the auxiliary heat exchange device to stop making hot water.

[0110] In an embodiment, when the first temperature difference determined according to the water supply temperature and the return water temperature is greater than or equal to the preset temperature difference and the second temperature difference between the set water supply temperature and the water supply temperature is less than zero, control the outlet water temperature of the auxiliary heat exchange device to decrease or control the auxiliary heat exchange device to stop making hot water.

[0111] It should be noted that when the first temperature difference is greater than or equal to the preset temperature difference, that is, the temperature difference between the supply water temperature and the return water temperature reaches the preset temperature difference, if the second temperature difference is less than zero, that is, the set supply water temperature is less than or equal to the supply water temperature, then it can be considered that the supply water temperature has reached the set supply water temperature at this time. Therefore, controlling the auxiliary heat exchange device to reduce the outlet water temperature or controlling the auxiliary heat exchange device to stop making hot water can keep the indoor comfort while reducing energy consumption, improving energy efficiency, and reducing heating costs.

[0112] Specifically, when the buffer water tank is arranged on the first water supply pipeline, the above step S210 of determining the target outlet water temperature of the auxiliary heat exchange device according to the set supply water temperature and the preset compensation temperature may include the following situations:

[0113] In the first situation, when the second temperature difference between the set supply water temperature and the supply water temperature is greater than the second preset threshold, the target outlet water temperature of the auxiliary heat exchange device is determined according to the set supply water temperature and the first preset compensation temperature;

[0114] When the second temperature difference between the set supply water temperature and the supply water temperature is between zero and the second preset threshold, the target outlet water temperature of the auxiliary heat exchange device is determined according to the set supply water temperature and the second preset compensation temperature, where the second preset compensation temperature is less than the first preset compensation temperature.

[0115] In an embodiment, when the buffer water tank is arranged on the first water supply pipeline, when the second temperature difference between the set supply water temperature and the supply water temperature is greater than the second preset threshold, the target outlet water temperature of the auxiliary heat exchange device is determined according to the set supply water temperature and the first preset compensation temperature; when the second temperature difference between the set supply water temperature and the supply water temperature is between zero and the second preset threshold, the target outlet water temperature of the auxiliary heat exchange device is determined according to the set supply water temperature and the second preset compensation temperature, where the second preset compensation temperature is less than the first preset compensation temperature. Therefore, the target outlet water temperature of the auxiliary heat exchange device can be controlled according to the second temperature difference.

[0116] It should be noted that by controlling the target outlet water temperature of the auxiliary heat exchange device through the second temperature difference, when the second temperature difference between the set supply water temperature and the supply water temperature is greater than the second preset threshold, the target outlet water temperature of the auxiliary heat exchange device can be controlled to increase, so that the supply water temperature can be increased faster.

[0117] It should be noted that by controlling the target outlet water temperature of the auxiliary heat exchange device through the second temperature difference, when the second temperature difference between the set supply water temperature and the supply water temperature is between zero and the second preset threshold, the target outlet water temperature of the auxiliary heat exchange device can be controlled to decrease, so as to reduce energy consumption, improve energy efficiency, and reduce heating costs.

[0118] It should be noted that the first preset compensation temperature and the second preset compensation temperature mentioned above can be set according to actual needs and are fixed values, which are not specifically limited in the embodiments of the present application.

[0119] Specifically, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the control method of the heat pump water system further includes the following situations:

[0120] The first situation: when the supply water temperature is greater than the set supply water temperature, reduce the outlet water temperature of the auxiliary heat exchange device or control the auxiliary heat exchange device to stop making hot water.

[0121] In one embodiment, when the buffer water tank is arranged on the first water supply pipeline, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, judge the magnitude relationship between the supply water temperature and the set supply water temperature. When the supply water temperature is greater than the set supply water temperature, control the outlet water temperature of the auxiliary heat exchange device to decrease or control the auxiliary heat exchange device to stop making hot water.

[0122] It should be noted that when the supply water temperature is greater than the set supply water temperature, controlling the outlet water temperature of the auxiliary heat exchange device to decrease or controlling the auxiliary heat exchange device to stop making hot water can reduce energy consumption, improve energy efficiency, and reduce heating costs while maintaining indoor comfort.

[0123] It should be noted that the above-mentioned preset time can be set according to actual needs and is a fixed value, which is not specifically limited in the embodiments of the present application.

[0124] As Figure 9 shown, Figure 9 is a flowchart of the control method of the heat pump water system provided by another embodiment of the present application; this control method can be applied to the heat pump water system in the above embodiment, and the specific steps are as follows:

[0125] Step S510: In the heating mode, the first water supply pipeline and the first return water pipeline are opened, and the heat pump device is started;

[0126] Step S520: Set the supply water temperature T10 to the set supply water temperature;

[0127] Step S530: Whether the outdoor temperature is less than or equal to the set outdoor temperature. If so, go to step S540; if not, go to step S580;

[0128] Step S540: Whether the supply water temperature T10 is greater than or equal to the set supply water temperature. If so, go to step S550; if not, go to step S580;

[0129] Step S550: Whether the current power of the heat pump device is greater than or equal to the preset maximum power. If so, go to step S560; if not, go to step S580;

[0130] Step S560: If the indoor temperature is less than or equal to the indoor set temperature, then proceed to step S570; otherwise, proceed to step S580.

[0131] Step S570: Whether the auxiliary heat exchange device is producing domestic hot water. If so, proceed to step S710; otherwise, proceed to step S720.

[0132] Step S571: Keep the heat pump device operating and wait for the auxiliary heat exchange device to finish producing domestic hot water.

[0133] Step S572: The heat pump device enters the combustion-heat complementary stage.

[0134] Step S580: The heat pump device keeps operating and increases its output capacity as needed.

[0135] In one embodiment, when the heat pump water system starts to operate in the heating mode, the first water supply pipeline and the first water return pipeline are opened, the heat pump device starts to operate, and the supply water temperature T10 is set to the set supply water temperature.

[0136] In one embodiment, when the outdoor temperature is greater than the outdoor set temperature, or the supply water temperature T10 is greater than or equal to the set supply water 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 keeps operating and increases its output capacity as needed.

[0137] In one embodiment, when the outdoor temperature is less than or equal to the outdoor set temperature, or the supply water temperature T10 is less than the set supply water 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 less than or equal to the indoor set temperature, and the auxiliary heat exchange device is not producing domestic hot water, the heat pump device enters the combustion-heat complementary stage. Therefore, combustion-heat complementarity can be achieved through the heat pump device and the auxiliary heat exchange device, which can solve the problem of poor performance of a single heat pump device and improve the heating effect of the heat pump water system.

[0138] In one embodiment, when the auxiliary heat exchange device is producing domestic hot water, keep the heat pump device operating and wait for the auxiliary heat exchange device to finish producing domestic hot water.

[0139] It can be understood that after the auxiliary heat exchange device finishes producing domestic hot water, control the auxiliary heat exchange device to produce hot water again, which 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 detected water supply temperature is greater than or equal to the set water supply temperature and the detected indoor temperature is greater than the indoor set temperature, the heat pump device is controlled to operate and the auxiliary heat exchange device is controlled to stop making hot water, so that while maintaining indoor comfort, energy consumption can be reduced, energy efficiency can be improved, and heating costs can be reduced.

[0141] It should be noted that the embodiments of the present application can achieve complementary combustion and heat through the heat pump device and the auxiliary heat exchange device. Therefore, the problem of poor effect of a single heat pump device can be solved, and the heating effect of the heat pump water system can be improved.

[0142] As Figure 10 shown, Figure 10 is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application; when the buffer water tank is arranged on the first return water pipeline, the specific steps included in the control method are as follows:

[0143] Enter complementary combustion and heat;

[0144] Start the auxiliary heat exchange device according to the complementary start instruction;

[0145] The heat pump device operates at the maximum power, and the water supply temperature and the return water temperature are detected;

[0146] Judge whether the outdoor temperature is less than or equal to the outdoor set temperature;

[0147] If the outdoor temperature is greater than the outdoor set temperature, then exit complementary combustion and heat, and the heat pump device generates heat;

[0148] If the outdoor temperature is less than or equal to the outdoor set temperature, then judge 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, then exit complementary combustion and heat, and the heat pump device generates heat;

[0150] If the water supply temperature T10 is less than the set water supply temperature, then determine the target outlet water temperature, and control the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time;

[0151] Judge whether the sum of the return water temperature and the preset energy demand temperature of the indoor heat exchange device is greater than or equal to the set water supply temperature;

[0152] If the sum of the return water temperature and the preset energy demand temperature of the indoor heat exchange device is less than the set water supply temperature, then control the auxiliary heat exchange device to continue to operate at the target outlet water temperature for a preset time;

[0153] If the sum of the return water temperature and the preset energy demand temperature of the indoor heat exchange device is greater than or equal to the set water supply temperature, then after complementary combustion and heat, the system energy demand target is met;

[0154] Determine whether the first temperature difference is greater than or equal to a preset temperature difference and the second temperature difference is less than zero;

[0155] When the first temperature difference is greater than or equal to the preset temperature difference and the second temperature difference is less than zero, the return water temperature begins to rise, the outlet water temperature of the auxiliary heat exchange device gradually decreases, or the auxiliary heat exchange device is controlled to stop making hot water.

[0156] In one embodiment, when the buffer water tank is arranged on the first return water pipeline, the heat pump water system enters the combustion-heat complementary stage, and the auxiliary heat exchange device is started according to the complementary start instruction. At this time, the heat pump device operates at the maximum power, and the supply water temperature and the return water temperature are detected.

[0157] In one embodiment, when the outdoor temperature is greater than the outdoor set temperature or the supply water temperature T10 is greater than or equal to the set supply water temperature, the heat pump water system is controlled to exit the combustion-heat complementary stage, and heat is generated by the heat pump device. Therefore, it is possible to reduce energy consumption, improve energy efficiency, and reduce heating costs while maintaining indoor comfort.

[0158] In one embodiment, when the outdoor temperature is less than or equal to the outdoor set temperature and the supply water temperature T10 is less than the set supply water temperature, the target outlet water temperature is determined, and the auxiliary heat exchange device is controlled to operate at the target outlet water temperature for a preset time.

[0159] It should be noted that when the outdoor temperature is less than or equal to the outdoor set temperature and the supply water temperature T10 is less than the set supply water temperature, the target outlet water temperature of the auxiliary heat exchange device is determined according to the set supply water temperature and the preset compensation temperature.

[0160] In one embodiment, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the return water temperature is detected. When the sum of the return water temperature and the preset energy demand temperature of the indoor heat exchange device is less than the set supply water temperature, the auxiliary heat exchange device is controlled to continue to operate at the target outlet water temperature for a preset time; when the sum of the return water temperature and the preset energy demand temperature of the indoor heat exchange device is greater than or equal to the set supply water temperature, after the combustion-heat complementarity of the heat pump water system, the system energy demand target can be met; then, when the first temperature difference is greater than or equal to the preset temperature difference and the second temperature difference is less than zero, the return water temperature of the heat pump water system begins to rise, and the outlet water temperature of the auxiliary heat exchange device is controlled to gradually decrease or the auxiliary heat exchange device is controlled to stop making hot water. Therefore, the combustion-heat complementarity can be realized through the heat pump device and the auxiliary heat exchange device, so as to solve the problem that the effect of a single heat pump device is not good, thereby improving the heating effect of the heat pump water system.

[0161] It should be noted that the first temperature difference is the temperature difference between the supply water temperature and the return water temperature, and the second temperature difference is the temperature difference between the set supply water temperature and the supply water temperature.

[0162] It should be noted that the preset required temperature can be set according to actual needs and is a fixed value. It can be the temperature difference between the supply water temperature and the return water temperature, and the embodiments of the present application do not make specific limitations.

[0163] It should be noted that the set supply water temperature, preset compensation temperature, preset time, and preset temperature difference can be set according to actual needs and are fixed values, and the embodiments of the present application do not make specific limitations.

[0164] As Figure 11 shown, Figure 11 is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application; when the buffer water tank is arranged on the first water supply pipeline and the first water return pipeline, the specific steps included in the control method are as follows:

[0165] Enter the combustion-heat complementarity;

[0166] Start the auxiliary heat exchange device according to the complementary start instruction;

[0167] Judge whether the outdoor temperature is less than or equal to the outdoor set temperature;

[0168] If the outdoor temperature is greater than the outdoor set temperature, exit the combustion-heat complementarity, and the heat pump device generates heat;

[0169] If the outdoor temperature is less than or equal to the outdoor set temperature, judge whether the second temperature difference is greater than zero;

[0170] If the second temperature difference is greater than zero, determine the target outlet water temperature, and control the auxiliary heat exchange device to produce hot water at the target outlet water temperature;

[0171] Judge whether the second temperature difference is greater than or equal to the first preset threshold;

[0172] If the second temperature difference is less than the first preset threshold, control the auxiliary heat exchange device to produce hot water at the target outlet water temperature;

[0173] If the second temperature difference is greater than or equal to the first preset threshold, increase the target outlet water temperature of the auxiliary heat exchange device;

[0174] Judge whether the first temperature difference is greater than or equal to the preset temperature difference and whether the second temperature difference is less than zero;

[0175] If the first temperature difference is less than the preset temperature difference and the second temperature difference is greater than zero, increase the target outlet water temperature of the auxiliary heat exchange device;

[0176] If the first temperature difference is greater than or equal to the preset temperature difference and the second temperature difference is less than zero, the return water temperature starts to rise, the outlet water temperature of the auxiliary heat exchange device gradually decreases, or control the auxiliary heat exchange device to stop producing hot water.

[0177] In one embodiment, when the buffer water tank is arranged on the first water supply pipeline and the first water return pipeline, the heat pump water system enters the combustion-heat complementary stage, starts the auxiliary heat exchange device according to the complementary start instruction, and detects the outdoor temperature.

[0178] In one embodiment, when the outdoor temperature is greater than the outdoor set temperature, the combustion-heat complementarity is exited and the heat pump device heats; when the outdoor temperature is less than or equal to the outdoor set temperature, it is judged whether the second temperature difference is greater than zero; secondly, when the second temperature difference is greater than zero, the target water outlet temperature is determined, and the auxiliary heat exchange device is controlled to operate at the target water outlet temperature for a preset time to produce hot water; thirdly, it is judged whether the second temperature difference is greater than or equal to the first preset threshold value. When the second temperature difference is less than the first preset threshold value, the auxiliary heat exchange device is controlled to operate at the target water outlet temperature for a preset time to produce hot water; when it is greater than or equal to the first preset threshold value, the target water outlet temperature of the auxiliary heat exchange device is increased; fourthly, it is judged whether the first temperature difference is greater than or equal to the preset temperature difference and whether the second temperature difference is less than zero. When the first temperature difference is less than the preset temperature difference and the second temperature difference is greater than zero, the target water outlet temperature of the auxiliary heat exchange device is increased; when the first temperature difference is greater than or equal to the preset temperature difference and the second temperature difference is less than zero, the return water temperature begins to rise, the water outlet temperature of the auxiliary heat exchange device gradually decreases, or the auxiliary heat exchange device is controlled to stop producing hot water. Therefore, the combustion-heat complementarity can be realized through the heat pump device and the auxiliary heat exchange device, so that the problem of poor effect of a single heat pump device can be solved, and the heating effect of the heat pump water system can be improved.

[0179] It should be noted that the first temperature difference is the temperature difference between the supply water temperature and the return water temperature, and the second temperature difference is the temperature difference between the set supply water temperature and the supply water temperature.

[0180] It should be noted that when the second temperature difference is greater than zero, the target water outlet temperature of the auxiliary heat exchange device is determined according to the set supply water temperature and the preset compensation temperature

[0181] It should be noted that the first preset threshold value, the set supply water temperature, the preset compensation temperature, the preset time, and the outdoor set temperature can be set according to actual needs and are fixed values, which are not specifically limited in the embodiments of the present application.

[0182] As Figure 12 shown, Figure 12 is a flowchart of a control method for a heat pump water system provided by another embodiment of the present application; when the buffer water tank is arranged on the first water supply pipeline, the specific steps included in the control method are as follows:

[0183] Enter the combustion-heat complementarity;

[0184] Start the auxiliary heat exchange device according to the complementary start instruction;

[0185] Determine whether the outdoor temperature is less than or equal to the outdoor set temperature;

[0186] If the outdoor temperature is greater than the outdoor set temperature, then exit the combustion and heat pump complementary mode, and the heat pump device operates for heating;

[0187] If the outdoor temperature is less than or equal to the outdoor set temperature, then determine whether the second temperature difference is greater than the second preset threshold;

[0188] If the second temperature difference is less than the second preset threshold, then exit the combustion and heat pump complementary mode, and the heat pump device operates for heating;

[0189] If the second temperature difference is greater than the second preset threshold, then determine the target outlet temperature of the auxiliary heat exchange device according to the set water supply temperature and the first preset compensation temperature;

[0190] Determine whether the second temperature difference is between zero and the second preset threshold;

[0191] If the second temperature difference is not between zero and the second preset threshold, then determine the target outlet temperature of the auxiliary heat exchange device according to the set water supply temperature and the first preset compensation temperature;

[0192] If the second temperature difference is between zero and the second preset threshold, then determine the target outlet temperature of the auxiliary heat exchange device according to the set water supply temperature and the second preset compensation temperature;

[0193] Determine whether the second temperature difference is less than zero;

[0194] If the second temperature difference is greater than zero, then determine the target outlet temperature of the auxiliary heat exchange device according to the set water supply temperature and the second preset compensation temperature;

[0195] If the second temperature difference is less than zero, then the return water temperature starts to rise, the outlet temperature of the auxiliary heat exchange device gradually decreases, or control the auxiliary heat exchange device to stop making hot water.

[0196] In one embodiment, when the buffer water tank is arranged on the first water supply pipeline, the heat pump water system enters the combustion and heat pump complementary stage, starts the auxiliary heat exchange device according to the complementary start instruction, and detects the outdoor temperature.

[0197] In one embodiment, when the outdoor temperature is greater than the outdoor set temperature or when the second temperature difference is less than the second preset threshold, then exit the combustion and heat pump complementary mode, and the heat pump device operates for heating.

[0198] In one embodiment, when the outdoor temperature is less than or equal to the outdoor set temperature and the second temperature difference is greater than the second preset threshold, the target outlet temperature of the auxiliary heat exchange device is determined according to the set water supply temperature and the first preset compensation temperature, and the auxiliary heat exchange device is controlled to operate at the target outlet temperature for a preset time to produce hot water. Secondly, it is judged whether the second temperature difference is between zero and the second preset threshold. When the second temperature difference is not between zero and the second preset threshold, the auxiliary heat exchange device is controlled to continue operating at the target outlet temperature of the auxiliary heat exchange device determined according to the set water supply temperature and the first preset compensation temperature for a preset time. When the second temperature difference is between zero and the second preset threshold, the target outlet temperature of the auxiliary heat exchange device is determined according to the set water supply temperature and the second preset compensation temperature, and the auxiliary heat exchange device is controlled to operate at this target outlet temperature for a preset time. Thirdly, it is judged whether the second temperature difference is less than zero. When the second temperature difference is greater than zero, the auxiliary heat exchange device is controlled to continue operating at the target outlet temperature of the auxiliary heat exchange device determined according to the set water supply temperature and the second preset compensation temperature for a preset time. When the second temperature difference is less than zero, the return water temperature begins to rise, the outlet temperature of the auxiliary heat exchange device gradually decreases, or the auxiliary heat exchange device is controlled to stop producing hot water. Therefore, heat pump-combined with auxiliary heat exchange can be achieved, so as to solve the problem of poor performance of a single heat pump device, thereby improving the heating effect of the heat pump water system.

[0199] It should be noted that the first temperature difference is the temperature difference between the water supply temperature and the return water temperature, and the second temperature difference is the temperature difference between the set water supply temperature and the water supply temperature.

[0200] It should be noted that the first preset threshold, the second preset threshold, the set water supply temperature, the preset compensation temperature, the preset time, and the outdoor set temperature can be set according to actual needs and are fixed values, which are not specifically limited in the embodiments of the present application.

[0201] It should be noted that the second preset threshold is less than the first preset threshold.

[0202] Based on the control methods of the above various embodiments, the embodiments of the controller and the computer-readable storage medium of the present application are respectively proposed below.

[0203] As Figure 13 shown, Figure 13 is a schematic structural diagram of a controller for executing the control method provided by an embodiment of the present application. The controller 800 implemented in the present application includes: a processor 810, a memory 820, and a computer program stored on the memory 820 and executable on the processor 810. Among them, Figure 13 one processor 810 and one memory 820 are taken as an example.

[0204] The processor 810 and the memory 820 can be connected by a bus or other means. Figure 13 Taking the connection by bus as an example.

[0205] As a non-transitory computer-readable storage medium, the memory 820 can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory 820 can include high-speed random access memory, and can also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 820 optionally includes a memory 820 that is remotely disposed relative to the processor 810, and these remote memories 820 can be connected to the controller 800 through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0206] Those skilled in the art can understand that Figure 13 the device structure shown in does not constitute a limitation on the controller 800, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0207] In Figure 13 the controller 800 shown, the processor 810 can be used to call the control program stored in the memory 820, so as to implement the above control method. Specifically, the non-transitory software program and instructions required to implement the control method of the above embodiments are stored in the memory 820, and when executed by the processor 810, the control method of the above embodiments is executed.

[0208] It should be noted that since the controller 800 of the embodiments of the present application can execute the control method of any of the above embodiments, therefore, the specific implementation manners and technical effects of the controller 800 of the embodiments of the present application can refer to the specific implementation manners and technical effects of the control method of any of the above embodiments.

[0209] In addition, an embodiment of the present application also provides a computer-readable storage medium, which stores computer-executable instructions for executing the above control method. Exemplarily, execute the method steps described above Figures 5 to 12 in.

[0210] It should be noted that since the computer-readable storage medium of the embodiments of the present application can execute the control method of any of the above embodiments, therefore, the specific implementation manners and technical effects of the computer-readable storage medium of the embodiments of the present application can refer to the specific implementation manners and technical effects of the control method of any of the above embodiments.

[0211] Those of ordinary skill in the art will 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 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 a computer 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 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 storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, tapes, 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, it is well known to those of ordinary skill in the art that communication media typically includes 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.

[0212] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A heat pump water system, characterized in that, it includes: an indoor heat exchange device; a heat pump unit, 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; a buffer water tank, which is arranged on the first water supply pipeline and / or the first water return pipeline; an auxiliary heat exchange device, which is connected to the buffer water tank through a second water return pipeline and a second water supply pipeline.

2. The heat pump water system according to claim 1, characterized in that, when the buffer water tank is arranged on both the first water supply pipeline and the first water return pipeline, the heat pump water system further includes a first water pump, and the first water pump is arranged on the first water supply pipeline between the buffer water tank and the indoor heat exchange device.

3. The heat pump water system according to claim 1 or 2, characterized in that, the indoor heat exchange device includes at least one of the following: fan coil unit, radiation panel, floor heating.

4. The heat pump water system according to claim 1 or 2, characterized in that, the heat pump water system further includes a manifold, and both the first water supply pipeline and the first water return pipeline are connected to the indoor heat exchange device through the manifold.

5. The heat pump water system according to claim 1 or 2, characterized in that, the heat pump unit is provided with a water-to-fluorine heat exchanger, a second water pump and a heat pump pipeline, the water-to-fluorine heat exchanger and the second 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.

6. The heat pump water system according to claim 1 or 2, characterized in that, one or more heat pump units are provided, and when there are multiple heat pump units, the multiple heat pump units are connected through the first water supply pipeline and the first water return pipeline.

7. The heat pump water system according to claim 1 or 2, characterized in that, the heat pump water system further includes a makeup water valve and a water inlet pipe, the water inlet pipe is connected to the buffer water tank, and the makeup water valve is arranged on the water inlet pipe.

8. The heat pump water system according to claim 7, characterized in that, the heat pump water system further includes a water outlet pipe, and the water inlet pipe is connected to the water outlet pipe through the auxiliary heat exchange device.

9. A control method for a heat pump water system, characterized in that, applied to the heat pump water system according to any one of claims 1 to 8, the control method includes: receiving a complementary start instruction; starting the auxiliary heat exchange device according to the complementary start instruction to heat the water in the buffer water tank.

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

11. The control method according to claim 10, wherein, after starting the auxiliary heat exchange device according to the complementary start command, the control method further includes: Determine the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and the preset compensation temperature; Control the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time.

12. The control method according to claim 11, wherein, when the buffer water tank is arranged on the first return water pipeline, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the control method further includes: Obtain the return water temperature of the heat pump device; When the sum of the return water temperature and the preset energy demand temperature of the indoor heat exchange device is greater than or equal to the set water supply temperature, determine the first temperature difference between the water supply temperature and the return water temperature, and determine the second temperature difference between the set water supply temperature and the water supply temperature; Control the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference.

13. The control method according to claim 11, wherein, when the buffer water tank is arranged on the first water supply pipeline and the first return water pipeline, after controlling the auxiliary heat exchange device to operate at the target outlet water temperature for a preset time, the control method further includes: Obtain the return water temperature of the heat pump device; When the second temperature difference between the set water supply temperature and the water supply temperature is greater than or equal to the first preset threshold, increase the target outlet water temperature of the auxiliary heat exchange device; Determine the first temperature difference between the water supply temperature and the return water temperature, and control the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference.

14. The control method according to claim 12 or 13, wherein, Controlling the operating state of the auxiliary heat exchange device according to the first temperature difference and the second temperature difference includes: When the first temperature difference is greater than or equal to the preset temperature difference and the second temperature difference is less than zero, reduce the outlet water temperature of the auxiliary heat exchange device or control the auxiliary heat exchange device to stop making hot water.

15. The control method according to claim 11, wherein, when the buffer water tank is arranged on the first water supply pipeline, determining the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and the preset compensation temperature includes at least one of the following: When the second temperature difference between the set water supply temperature and the water supply temperature is greater than the second preset threshold, determine the target outlet water temperature of the auxiliary heat exchange device according to the set water supply temperature and the first preset compensation temperature; When the second temperature difference between the set water supply temperature and the water supply temperature is between zero and the second preset threshold, determine the target outlet temperature of the auxiliary heat exchange device according to the set water supply temperature and the second preset compensation temperature, where the second preset compensation temperature is less than the first preset compensation temperature.

16. The control method according to claim 15, wherein: After controlling the auxiliary heat exchange device to operate at the target outlet temperature for a preset time, the control method further includes: When the water supply temperature is greater than the set water supply temperature, reduce the outlet temperature of the auxiliary heat exchange device or control the auxiliary heat exchange device to stop making hot water.

17. A controller, wherein: comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor runs the computer program, it executes the control method of the heat pump water system according to any one of claims 9 to 16.

18. A computer-readable storage medium, wherein: stores computer-executable instructions for executing the control method of the heat pump water system according to any one of claims 9 to 16.

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