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 buffer container. 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 container is arranged on the first water supply pipeline; the auxiliary heat exchange equipment is communicated to the first water supply pipeline through the buffer container; wherein the buffer container is used for dividing a primary water system corresponding to the heat pump device and the auxiliary heat exchange equipment and a secondary water system corresponding to the indoor heat exchange equipment; according to the embodiment of the invention, the heat pump device and the auxiliary heat exchange equipment cannot interfere with each other in the water supply process, so that relatively high energy efficiency is well kept.

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. The outdoor unit and the hydraulic module corresponding to the all-in-one air-to-water multi-connected unit are split-type, and are combined with the indoor unit to form a multi-connected system; when the outdoor ambient temperature is relatively low, the heat pump system can work normally but the outlet water temperature cannot reach the set temperature. At this time, it is still necessary to use a wall-mounted boiler for combustion complementary treatment; however, when performing combustion complementary treatment, the water pumps of the wall-mounted boiler and the heat pump main unit are prone to interfere with each other, so that the multi-connected unit cannot maintain a high energy efficiency well during the combustion complementary process. 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 prevent the heat pump device and the auxiliary heat exchange device from interfering with each other during the water supply process, so as to maintain a high energy efficiency well.

[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] A buffer container, which is arranged on the first water supply pipeline;

[0008] An auxiliary heat exchange device, which is connected to the first water supply pipeline through the buffer container;

[0009] Wherein, the buffer container is used to divide a primary water system corresponding to the heat pump device and the auxiliary heat exchange device and a secondary water system corresponding to the indoor heat exchange device.

[0010] According to some embodiments of the present application, the buffer container includes a first water inlet port, a second water inlet port, a first water outlet port, and a second water outlet port. The first water inlet port is connected to the heat pump device, the second water inlet port and the second water outlet port are both connected to the auxiliary heat exchange device, and the first water outlet port is connected to the indoor heat exchange device.

[0011] According to some embodiments of the present application, the buffer container is a coupling tank or a first buffer water tank.

[0012] According to some embodiments of the present application, the heat pump system further includes a second buffer water tank, a water replenishing valve, and a water inlet pipe. The second buffer water tank is disposed on the first return water pipeline, the water inlet pipe is communicated with the second buffer water tank, and the water replenishing valve is disposed on the water inlet pipe.

[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 with the multiple heat pump units. The multiple heat pump units are all communicated to the water inlet of the indoor heat exchange device through the first water supply pipeline, and the multiple heat pump units are all communicated 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 indoor heat exchange device includes at least one of the following: a fan coil unit, a radiation panel, and a floor heating system.

[0015] According to some embodiments of the present application, the heat pump device 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 disposed on the heat pump pipeline. One end of the heat pump pipeline is communicated with the first water supply pipeline, and the other end is communicated with the first return water pipeline.

[0016] 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 as described above. The control method includes:

[0017] Receiving a working state control instruction;

[0018] Controlling the working states of the heat pump device and the auxiliary heat exchange device according to the working state control instruction.

[0019] According to some embodiments of the present application, the working state control instruction is generated through at least one of the following steps:

[0020] Obtaining the outdoor temperature. When the outdoor temperature is less than or equal to the first outdoor set temperature and greater than or equal to the second outdoor set temperature, generating the working state control instruction;

[0021] Obtaining the water supply temperature of the indoor heat exchange device. When the water supply temperature is less than the set water supply temperature, generating the working state control instruction;

[0022] Obtaining the indoor temperature. When the indoor temperature is less than or equal to the indoor set temperature, generating the working state control instruction;

[0023] Obtaining the current power of the heat pump device. When the current power is greater than or equal to the preset maximum power, generating the working state control instruction.

[0024] According to some embodiments of the present application, controlling the operating states of the heat pump device and the auxiliary heat exchange device according to the operating state control instruction includes:

[0025] Controlling the heat pump device and the auxiliary heat exchange device to heat water simultaneously according to the operating state control instruction.

[0026] According to some embodiments of the present application, the operating state control instruction is generated through the following steps:

[0027] Obtain the outdoor temperature and the water supply temperature of the indoor heat exchange device. When the outdoor temperature is less than the second outdoor set temperature, and the water supply temperature is greater than the first preset temperature and less than the set water supply temperature, generate the operating state control instruction.

[0028] According to some embodiments of the present application, controlling the operating states of the heat pump device and the auxiliary heat exchange device according to the operating state control instruction includes:

[0029] Control the water pump of the heat pump device to operate at a set speed and stop the compressor of the heat pump device, and control the auxiliary heat exchange device to supply water to the indoor heat exchange device.

[0030] According to some embodiments of the present application, after controlling the auxiliary heat exchange device to supply water to the indoor heat exchange device, the control method further includes:

[0031] Increase the speed of the water pump of the heat pump device;

[0032] When the water supply temperature is greater than or equal to the set water supply temperature, control the indoor heat exchange device to perform heat exchange processing.

[0033] 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, the control method of the heat pump system as described above is implemented.

[0034] 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.

[0035] 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, a buffer container, and an auxiliary heat exchange device; wherein, the heat pump unit forms a circulation loop with the indoor heat exchange device through a first water supply pipeline and a first water return pipeline; and a buffer container is arranged on the first water supply pipeline, and the auxiliary heat exchange device is also connected to the first water supply pipeline through the buffer container, so that the heat pump unit and the auxiliary heat exchange device can supply water to the buffer container simultaneously; based on the buffer container, the internal water pump of the heat pump unit will not be affected by the auxiliary heat exchange device during the water supply process, which can well prevent interference between the two during the simultaneous water supply process, and further enable the heat pump system to maintain a high energy efficiency; and the buffer container can also divide the primary water system and the secondary water system, wherein, the primary water system includes the heat pump unit and the auxiliary heat exchange device, and the secondary water system includes the indoor heat exchange device.

[0036] Other features and advantages of the present application will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures specifically pointed out in the specification, claims, and drawings. Brief Description of the Drawings

[0037] Figure 1 is a schematic structural diagram of the heat pump system provided by the embodiment of the present application;

[0038] Figure 2 is a schematic internal structure diagram of the heat pump main unit provided by the embodiment of the present application;

[0039] Figure 3 is a flowchart of the control method of the heat pump system provided by the embodiment of the present application;

[0040] Figure 4 is a specific flowchart of the working state control instruction provided by the embodiment of the present application;

[0041] Figure 5 is a specific flowchart of the working state control instruction provided by another embodiment of the present application;

[0042] Figure 6 is a specific flowchart of the working state control instruction provided by another embodiment of the present application;

[0043] Figure 7 is a specific flowchart of the working state control instruction provided by another embodiment of the present application;

[0044] Figure 8 is a specific flowchart of controlling the working states of the heat pump unit and the auxiliary heat exchange device provided by the embodiment of the present application;

[0045] Figure 9 It is a specific flowchart of the working state control instruction provided by another embodiment of the present application;

[0046] Figure 10 It is a specific flowchart of controlling the working states of the heat pump device and the auxiliary heat exchange equipment provided by another embodiment of the present application;

[0047] Figure 11 It is a flowchart of the control method of the heat pump system provided by another embodiment of the present application;

[0048] Figure 12 It is a specific flowchart of the control method of the heat pump system provided by an embodiment of the present application;

[0049] Figure 13 It is a specific flowchart of the control method of the heat pump system provided by another embodiment of the present application;

[0050] Figure 14 It is a schematic structural diagram of the controller provided by an embodiment of the present application. Specific Embodiments

[0051] In order to make the objectives, technical solutions and advantages of the present application clearer, 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. Additionally, the features, operations or characteristics described in the specification can be combined in any suitable manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be reordered or adjusted in an obvious manner for 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 an essential sequence unless it is stated that a certain sequence must be followed.

[0052] 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, while understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first", "second", etc., 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 of the indicated technical features.

[0053] 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 meaning. And the "connection" and "coupling" mentioned in the present application, unless otherwise specified, both include direct and indirect connection (coupling).

[0054] With the continuous development of the social economy and the continuous progress of technology, people's living standards have been continuously improved. The outdoor unit and the hydraulic module corresponding to the air-to-water and water-to-water multi-connected unit are split-type, and together with the indoor unit, they form a multi-connected system. When the outdoor environmental temperature is relatively low, the heat pump system can operate normally but the water outlet temperature cannot reach the set temperature. At this time, it is still necessary to use a wall-mounted boiler for combustion complementary treatment. However, when performing combustion complementary treatment, the water pumps of the wall-mounted boiler and the heat pump main unit are prone to interfere with each other, making it difficult for the multi-connected unit to maintain high energy efficiency during the combustion complementary process.

[0055] 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 prevent the heat pump device and the auxiliary heat exchange device from interfering with each other during the water supply process, so as to maintain high energy efficiency well.

[0056] The following will be described with reference to the accompanying drawings:

[0057] Refer to Figure 1 , Figure 1 FIG. is a heat pump system provided by the embodiments 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 buffer container 400. The heat pump device 100 and the indoor heat exchange device 300 form a closed circulating water path through a first water supply pipeline and a first water return pipeline, and a buffer container 400 is provided on the first water supply pipeline. The auxiliary heat exchange device 200 and the buffer container 400 also form a closed circulating water path. Thus, the hot water transmitted by the heat pump device 100 and the hot water transmitted by the auxiliary heat exchange device 200 can converge in the buffer container 400, and then the converged water can be transmitted to the indoor heat exchange device 300 for heat exchange operations together. Based on the buffer container 400, the internal water pump of the heat pump device 100 will not be affected by the auxiliary heat exchange device 200 during the water supply process, which can effectively prevent interference between the two during the simultaneous water supply process, and further enable the heat pump system to maintain high energy efficiency. And the buffer container 400 can also divide the primary water system and the secondary water system. Among them, the primary water system includes the heat pump device 100 and the auxiliary heat exchange device 200, and the secondary water system includes the indoor heat exchange device 300.

[0058] It should be noted that the heat pump system in the embodiments of the present application is a water circuit system composed of a heat pump device 100, an auxiliary heat exchange device 200, and an indoor heat exchange device 300. The three are connected by a water circuit. Exemplarily, the cold water can be heated based on the heat pump device 100 and the auxiliary heat exchange device 200 so that the cold water is transformed into hot water. Then, the hot water is transmitted to the indoor heat exchange device 300 through relevant connecting pipelines and a buffer container 400 for heat exchange processing. The hot water that has undergone heat exchange processing by the indoor heat exchange device 300 will become cold water, and the cold water is directly returned to the heat pump device 100 through relevant connecting pipelines for heating processing, heating the cold water into hot water again, and circulating in this way.

[0059] It should be noted that, generally, 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 or cannot operate normally due to low temperature, the working states of the heat pump device 100 and the auxiliary heat exchange device 200 will be controlled so that the auxiliary heat exchange device 200 also supplies 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. Therefore, 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.

[0060] It should be noted that the buffer container 400 can be a coupling tank or a first buffer water tank; among them, the coupling tank is also called a decoupling tank or a mixing water tank. It is different from the mixing water center. The mixing water center is used for the mixing system and can only simply adjust the water temperature, while the coupling tank is commonly used in the floor heating system, can achieve flow management, improve the operation efficiency of the floor heating system, and save system energy consumption; the coupling tank is specifically used to solve the system coupling phenomenon caused by uneven flow and different pressures in each loop of the heat pump system due to different reasons. The coupling tank can well prevent the pressure difference between the supply and return water of the entire system from being too large because the water pump head of the auxiliary heat exchange device 200 is insufficient and cannot reach the expected heating effect; in addition, adding a separate circulation pump outside the system will increase the instability of the system, affect the service life of the equipment, cannot control the rated temperature difference between the supply and return water of the auxiliary heat exchange device 200, cause energy waste, increase system energy consumption, and the heating comfort is poor. Therefore, a coupling tank needs to be installed in the heat pump system. The buffer container 400 can well prevent the water pump of the heat pump device 100 from interfering with the water pump of the auxiliary heat exchange device 200. The low flow rate of the auxiliary heat exchange device 200 can be used to supplement the hot water supply to the main water supply loop of the heat pump device 100. The main loop uses the water pump of the heat pump device 100, and the head is not affected. In an ultra-low temperature outdoor environment, the outdoor heat pump device 100 cannot start, and at this time, the heating is completely provided by the auxiliary heat exchange device 200; in addition, when the outdoor ambient temperature is relatively low, the heat pump device 100 is working but the outlet water temperature does not reach the set temperature. At this time, the auxiliary heat exchange device 200 is also used for heat compensation, so as to improve the energy efficiency of the entire heat pump system. In addition, the first buffer water tank can also achieve the same technical effect as the coupling tank, which will not be elaborated here.

[0061] 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-level heat source, air, to a high-level 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 cooling and heating terminal device. The radiant panel 320 is a plate-shaped heating, ventilation, and air conditioning equipment, 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. It uses the heat storage of the ground itself and the law of heat radiation upward to conduct heat from bottom to top to achieve the purpose of heating.

[0062] It should be noted that the first water supply pipeline and the second water supply pipeline can be rubber hoses, which have good corrosion resistance and rust prevention characteristics, so that the connecting water pipes can be more durable.

[0063] It should be noted that during the process of controlling the working states of the heat pump device 100 and the auxiliary heat exchange device 200, 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 auxiliary heat exchange device 200, only the auxiliary heat exchange device 200 is used to supply water to the indoor heat exchange device 300.

[0064] Refer to Figure 1, the buffer container 400 may include a first water inlet port, a second water inlet port, a first water outlet port, and a second water outlet port. Among them, the first water inlet port is connected to the heat pump device 100, the second water inlet port and the second water outlet port are both connected to the auxiliary heat exchange device 200, and the first water outlet port is connected to the indoor heat exchange device 300. Through the above connection method, the water outlets of the heat pump device 100 and the auxiliary heat exchange device 200 can be input into the buffer container 400. And because the water inflow of the heat pump device 100 is larger than that of the auxiliary heat exchange device 200, therefore, a part of the water inlet of the heat pump device 100 returns to the auxiliary heat exchange device 200 through the return water pipe of the auxiliary heat exchange device 200 for heating treatment, and is re-input into the buffer container 400 from the water outlet pipe of the auxiliary heat exchange device 200, and finally input into the indoor heat exchange device 300 for heat exchange treatment. Based on the buffer container 400, the water pumps of the heat pump device 100 and the auxiliary heat exchange device 200 can be well isolated, and the two will not interfere with each other, thus well improving the energy efficiency of the heat pump system.

[0065] Referring to Figure 1 , a second buffer water tank 500 may also be provided on the first return water pipeline, and the second buffer water tank 500 may also be connected to the water inlet pipe of the auxiliary heat exchange device 200, and a water replenishing valve 600 is also provided on the connecting pipeline; through the second 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 water replenishing valve 600 can also be opened to replenish water to the second 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. The buffer container 400 and the second buffer water tank 500 cooperate with each other to control the water flow rate in the heat pump system, and well divide the primary water system and the secondary water system, and the two will not interfere with each other, so that the heat pump system can maintain a high energy efficiency.

[0066] Referring to Figure 1, 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 embodiment of the present application, the first heat pump 110 serves as the master heat pump, and the second heat pump 120 serves as the slave heat pump. The two are also connected by a communication connection line, so that the first heat pump 110 can also perform control processing on 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, while the cold water discharged from the indoor heat exchange device 300 can be respectively transmitted to the first heat pump 110 and the second heat pump 120 through the first return water pipeline; and the first heat pump 110 is also connected to the 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.

[0067] 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 master heat pump does not mean that only the first heat pump 130 can be used as the master heat pump. In fact, the second heat pump 140 can also be used as the master heat pump, and only need to connect the wired controller 130 to the second heat pump 140.

[0068] 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 wired controller 130. Then, by using the wired controller 130, the multiple heat pumps can be controlled to achieve more efficient and stable water supply processing; it should be noted that only the embodiment of two heat pumps is provided in the embodiments of the present application, and it should not be considered that the heat pump device 100 can only include two heat pumps.

[0069] In some embodiments of the present application, the fan coil unit 310 and the radiant panel 320 may be arranged in the same indoor space, for example, in the same room, or may be separately arranged in different indoor spaces, which is not limited here. And in the process of arranging the fan coil unit 310, the radiant panel 320 and the floor heating 340, the manifold 340 can also be used for collective connection. The manifold 340 can perform the collection and distribution of the supply and return water, flow regulation and control, and can manually or automatically remove the air in 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.

[0070] Reference Figure 2 , the first heat pump 110 and the second heat pump 120 included in the heat pump device 100 both 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 transfer the heated cold water to the first water supply pipeline so that the hot water can be transferred from the first water supply pipeline to the indoor heat exchange device 300.

[0071] Reference Figure 3 , Figure 3 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:

[0072] Step S100, receiving a working state control instruction;

[0073] Step S200, controlling the working states of the heat pump device and the auxiliary heat exchange device according to the working state control instruction.

[0074] 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 working state control instruction, it can control and process the heat pump device and the auxiliary heat exchange device in the heat pump system according to the received instruction to meet the needs of users.

[0075] 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 working state control instruction according to the current environment; then, according to the generated working state control instruction, control the working states of the heat pump device and the auxiliary heat exchange device. The auxiliary heat exchange device with higher heat production efficiency can be used to supply water to the indoor heat exchange device, which can well make up for the energy efficiency deficiency of the heat pump device and ensure that the indoor heat exchange device can operate normally, bringing a better user experience to users.

[0076] Reference Figure 4 , the working state control instruction can be generated through but not limited to the following steps:

[0077] Step S110, obtaining the outdoor temperature;

[0078] Step S120, when the outdoor temperature is less than or equal to the first outdoor set temperature and greater than or equal to the second outdoor set temperature, generating a working state control instruction.

[0079] In an embodiment of the present application, during the process of generating a working state control instruction, the outdoor temperature can be used; when the outdoor temperature is not greater than the first outdoor set temperature and not less than the second outdoor set temperature, a working state control instruction can be generated. Exemplarily, the first outdoor set temperature can be -15°C, and the second outdoor set temperature can be -25°C. When the outdoor temperature is not less than -25°C and not greater than -15°C, a working state control instruction can be generated.

[0080] Referring to Figure 5 , the working state control instruction can be generated through, but not limited to, the following steps:

[0081] Step S130, obtain the water supply temperature of the indoor heat exchange device;

[0082] Step S140, when the water supply temperature is less than the set water supply temperature, generate a working state control instruction.

[0083] In an embodiment of the present application, during the process of generating a working state control instruction, the water supply temperature of the indoor heat exchange device can be used; when the set water supply temperature is greater than the water supply temperature, a working state control instruction can be generated. Exemplarily, the set water supply temperature can be 15°C. When the water supply temperature is less than 15°C, a working state control instruction can also be generated.

[0084] Referring to Figure 6 , the working state control instruction can be generated through, but not limited to, the following steps:

[0085] Step S150, obtain the indoor temperature;

[0086] Step S160, when the indoor temperature is less than or equal to the indoor set temperature, generate a working state control instruction.

[0087] In an embodiment of the present application, during the process of generating a working state control instruction, the indoor temperature can be used; when the indoor temperature is not greater than the indoor set temperature, a working state control instruction can be generated. Exemplarily, the indoor temperature can be 20°C. When the indoor temperature is not greater than 20°C, a working state control instruction can be generated.

[0088] Referring to Figure 7 , the working state control instruction can be generated through, but not limited to, the following steps:

[0089] Step S170, obtain the current power of the heat pump device;

[0090] Step S180, when the current power is greater than or equal to the preset maximum power, generate a working state control instruction.

[0091] In the embodiment of the present application, during the process of generating the working state control instruction, a valve switching instruction can also be generated according to the output power of the heat pump device. When the current power of the heat pump device is not less than the preset maximum power, a valve switching instruction can also be generated.

[0092] It should be noted that the above preset parameters can all be set according to actual requirements, so that the generation of instructions can be more flexible. 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.

[0093] Refer to Figure 8 , the above step S200 may include but is not limited to the following steps:

[0094] Step S210, controlling the heat pump device to produce hot water according to the working state control instruction;

[0095] Step S220, controlling the auxiliary heat exchange device to produce hot water according to the working state control instruction.

[0096] In the embodiment of the present application, when the outdoor temperature is not greater than the first outdoor set temperature and not less than the second outdoor set temperature; or when the water supply temperature is less than the set water supply temperature; or when the indoor temperature is not greater than the indoor set temperature; or when the current power of the heat pump device is not less than the preset maximum power, a working state control instruction can be generated. Then, the heat pump system can control the heat pump device and the auxiliary heat exchange device according to this instruction, so that the heat pump device and the auxiliary heat exchange device simultaneously perform hot water production processing to meet the heat exchange requirements of the indoor heat exchange device.

[0097] Exemplarily, when the outdoor temperature is not less than -25°C and not greater than -15°C, it will be determined that the outdoor environment is in a low-temperature state at this time, and the heat pump device cannot meet the heat exchange requirements of the indoor heat exchange device. Therefore, it is necessary for the auxiliary heat exchange device to also supply hot water to the indoor heat exchange device, so as to control the auxiliary heat exchange device and the heat pump device to enter a heat energy complementary mode, that is, to supply hot water to the indoor heat exchange device simultaneously.

[0098] Refer to Figure 9 , the working state control instruction can also be generated through but not limited to the following steps:

[0099] Step S111, obtaining the outdoor temperature and the water supply temperature of the indoor heat exchange device;

[0100] Step S112: When the outdoor temperature is less than the second outdoor set temperature, and the water supply temperature is greater than the first preset temperature and less than the set water supply temperature, generate a working state control instruction.

[0101] In the embodiments of the present application, during the process of generating the working state control instruction, it can be based on the outdoor temperature and the water supply temperature of the indoor heat exchange device; among them, when the outdoor temperature is less than the second outdoor set temperature, and the water supply temperature is greater than the first preset temperature and less than the set water supply temperature, a working state control instruction can also be generated. Exemplarily, the second outdoor set temperature can be -25 °C, the first preset temperature is 0 °C, and the set water supply temperature is 9 °C. Therefore, when the outdoor temperature is less than -25 °C, and the water supply temperature is greater than 0 °C and less than 9 °C, a working state control instruction will also be generated; according to this instruction, the heat pump device is in a protection state, and only the auxiliary heat exchange device is used to supply hot water to the indoor heat exchange device, because at this time the outdoor is in an ultra-low temperature state, and the heat pump device can no longer work properly. Therefore, only the auxiliary heat exchange device can be used for hot water treatment.

[0102] Refer to Figure 10 , the above step S200 may include but is not limited to the following steps:

[0103] Step S230: Control the water pump of the heat pump device to run at a set speed and stop the compressor of the heat pump device;

[0104] Step S240: Control the auxiliary heating device to supply water to the indoor heat exchange device.

[0105] In the embodiments of the present application, when the outdoor temperature is less than the second outdoor set temperature, and the water supply temperature is greater than the first preset temperature and less than the set water supply temperature, a working state control instruction can also be generated; according to this instruction, the water pump of the heat pump device can be controlled to run at a lower speed, and the compressor of the heat pump device stops working, because at this time the outside is in an ultra-low temperature environment, and the heat pump device cannot work properly. Therefore, it is necessary to control the auxiliary heating device to supply water to the indoor heat exchange device to meet the heat exchange requirements of the indoor heat exchange device and provide heating treatment for indoor users.

[0106] It should be noted that the set speed in the embodiments of the present application is a lower speed. At this time, the heat pump device is in a protection mode, and the compressor of the heat pump device stops working. Only the water pump of the heat pump device is used to input the return water of the indoor heat exchange device into the buffer container, so that it can flow back to the auxiliary heat exchange device for heating treatment, and the auxiliary heat exchange device is used to supply hot water to the indoor heat exchange device.

[0107] Refer to Figure 11 , after executing the above step S240, it may further include but is not limited to the following steps:

[0108] Step S310, increase the rotational speed of the water pump of the heat pump device;

[0109] Step S320, when the supply water temperature is greater than or equal to the set supply water temperature, control the indoor heat exchange device to perform heat exchange processing.

[0110] In the embodiment of the present application, during the process of using the auxiliary heat exchange device to produce hot water for the indoor heat exchange device when the heat pump device is in the protection mode, the rotational speed of the water pump of the heat pump device can also be increased, so that the water flow rate returning to the heat pump device increases, and then the water flow rate output from the first water supply pipeline of the heat pump device will also increase. As a result, the return water flow rate entering the auxiliary heat exchange device through the buffer container and the return water pipeline of the auxiliary heat exchange device will also increase, thereby increasing the hot water output of the auxiliary heat exchange device and improving the heating efficiency; when the supply water temperature is greater than or equal to the set supply water temperature, the indoor heat exchange device can be turned on to perform heat exchange processing to meet the heating needs of users and bring a better user experience.

[0111] Specific embodiments are provided below to elaborate in detail on the control method of the heat pump system in the embodiment of the present application.

[0112] Referring to Figure 12 and Figure 13 , Figure 12 and Figure 13 There is provided a control method for a heat pump system, which all correspond to Figure 1 the structural diagram of the heat pump system shown, where the 9a and 9b cycles are the circulating water paths of the auxiliary heat exchange device, T4 is the outdoor temperature, T9 is the supply water temperature of the heat pump device, T10 is the supply water temperature entering the indoor load, T1 is the indoor temperature, Ta is the set supply water temperature, the auxiliary heat exchange device is a gas wall-mounted boiler or a gas water heater, and the indoor heat exchange device is the indoor load; when the outdoor temperature is less than or equal to the first outdoor set temperature and greater than or equal to the second outdoor set 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 and the auxiliary heat exchange device will be used to perform hot water supply treatment simultaneously; and before the outdoor heat pump main unit and the wall-mounted boiler perform hot water supply treatment simultaneously, it is also necessary to determine that the wall-mounted boiler is not in the state of preparing domestic hot water. When the supply water temperature of the indoor load reaches the set supply water temperature, the indoor load will start heating.

[0113] When the environmental temperature where the heat pump is located is extremely low, for example, T4 < -25°C, it can be obtained that Figure 13Control method of the heat pump system shown; the water supply temperature of the heat pump device needs to be greater than 0°C, so as to effectively prevent the water pipes from freezing; when the heat pump is in an extremely low temperature situation, the heat pump unit will be in a protection mode, the water pump of the heat pump unit runs at a lower speed and the compressor stops working; when the gas water heater is not in the state of preparing domestic hot water, the gas water heater will be used to supply water and heat the indoor load. At this time, the speed of the water pump of the heat pump unit will increase; when the water supply temperature entering the indoor load reaches the set water supply temperature, the indoor load will start heating.

[0114] Referring to Figure 14 , an embodiment of the present application also provides a controller 700, including a memory 720, a processor 710, and a computer program stored on 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.

[0115] Referring to Figure 14 , taking the example that the processor 710 and the memory 720 in the controller 700 can be connected by 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 high-speed random access memory, and may also include non-transitory memory, such as at least one disk memory, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 720 may optionally include a memory remotely set relative to the processor 710, and these remote memories can be connected to the controller 700 through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0116] Those skilled in the art can understand that Figure 14 the device structure shown in

[0117] does not limit the controller 700, and may include more or fewer components than shown in the figure, or combine some components, or arrange different components. Figure 14 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 of the heat pump system. For example, when executed by Figure 3 one of the processors 710 in Figure 4 it can cause the above one or more processors 710 to execute the control method of the heat pump system in the above method embodiment. For example, execute the method steps S100 to step S200 described above in Figure 5 the method steps S110 to step S120 in Figure 6Method steps S150 to step S160 in Figure 7 Method steps S170 to step S180 in Figure 8 Method steps S210 to step S220 in Figure 9 Method steps S111 to step S112 in Figure 10 Method steps S230 to step S240 in and Figure 11 Method steps S310 to step S320 in

[0118] 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.

[0119] Those of ordinary skill in the art can understand that all or some of the steps and systems in the methods 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 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.

[0120] The above is a specific description of the preferred embodiments of this application, but this application is not limited to the above embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of this application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A heat pump 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 container, which is arranged on the first water supply pipeline; an auxiliary heat exchange device, which is connected to the first water supply pipeline through the buffer container; wherein, the buffer container is used to divide a primary water system corresponding to the heat pump unit and the auxiliary heat exchange device and a secondary water system corresponding to the indoor heat exchange device.

2. The heat pump system according to claim 1, characterized in that, the buffer container includes a first water inlet port, a second water inlet port, a first water outlet port and a second water outlet port. The first water inlet port is connected to the heat pump unit, the second water inlet port and the second water outlet port are both connected to the auxiliary heat exchange device, and the first water outlet port is connected to the indoor heat exchange device.

3. The heat pump system according to claim 2, characterized in that, the buffer container is a coupling tank or a first buffer water tank.

4. The heat pump system according to claim 1, characterized in that, the heat pump system further includes a second buffer water tank, a makeup water valve and a water inlet pipe. The second buffer water tank is arranged on the first water return pipeline, the water inlet pipe is connected to the second buffer water tank, and the makeup water valve is arranged on the water inlet pipe.

5. The heat pump system according to any one of claims 1 to 3, 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 the multiple heat pump machines are all connected to the water outlet of the indoor heat exchange device through the first water return pipeline.

6. The heat pump system according to any one of claims 1 to 3, characterized in that, the indoor heat exchange device includes at least one of the following: a fan coil unit, a radiant panel, a floor heating.

7. The heat pump system according to any one of claims 1 to 3, characterized in that, the heat pump unit 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. A control method for a heat pump system, characterized in that, it is applied to the heat pump system according to any one of claims 1 to 7, and the control method includes: receiving a working state control instruction; controlling the working states of the heat pump unit and the auxiliary heat exchange device according to the working state control instruction.

9. The control method according to claim 8, characterized in that, the working state control instruction is generated through at least one of the following steps: acquiring the outdoor temperature. When the outdoor temperature is less than or equal to the first outdoor set temperature and greater than or equal to the second outdoor set temperature, generating the working state control instruction; acquiring the water supply temperature of the indoor heat exchange device. When the water supply temperature is less than the set water supply temperature, generating the working state control instruction; Obtain the indoor temperature. When the indoor temperature is less than or equal to the indoor set temperature, generate the working state control instruction; Obtain the current power of the heat pump device. When the current power is greater than or equal to the preset maximum power, generate the working state control instruction.

10. The control method according to claim 9, wherein, The controlling the working states of the heat pump device and the auxiliary heat exchange device according to the working state control instruction includes: Controlling the heat pump device and the auxiliary heat exchange device to produce hot water simultaneously according to the working state control instruction.

11. The control method according to claim 8, wherein, The working state control instruction is generated through the following steps: Obtain the outdoor temperature and the water supply temperature of the indoor heat exchange device. When the outdoor temperature is less than the second outdoor set temperature, and the water supply temperature is greater than the first preset temperature and less than the set water supply temperature, generate the working state control instruction.

12. The control method according to claim 11, wherein, The controlling the working states of the heat pump device and the auxiliary heat exchange device according to the working state control instruction includes: Controlling the water pump of the heat pump device to run at a set speed and the compressor of the heat pump device to stop working, and controlling the auxiliary heat exchange device to supply water to the indoor heat exchange device.

13. The control method according to claim 12, wherein, After controlling the auxiliary heat exchange device to supply water to the indoor heat exchange device, the control method further includes: Increasing the speed of the water pump of the heat pump device; When the water supply temperature is greater than or equal to the set water supply temperature, controlling the indoor heat exchange device to perform heat exchange processing.

14. 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 8 to 13.

15. 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 8 to 13.

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