Control method and device of mixed type heat pump device and mixed type heat pump device

Abstract

The invention discloses a control method and device of a mixed type heat pump device and the mixed type heat pump device. The control method of the mixed type heat pump device comprises the steps that the operation mode of the mixed type heat pump device is obtained; when the operation mode is a simultaneous heating and water heating mode, a first outlet of the three-way valve is controlled to be closed, an inlet of the three-way valve is controlled to be communicated with a second outlet, and the heat pump is controlled to start to operate, so that the heat pump heats water in the water tank; and controlling the first inlet of the water mixing valve to be closed, controlling the second inlet of the water mixing valve to be communicated with the outlet of the water mixing valve, and controlling the boiler to start to operate, so that the boiler heats the liquid flowing into the indoor unit. According to the hybrid heat pump device, the situation that water storage of the water tank is insufficient or the indoor temperature fluctuates due to mutual influence of heating and water heating can be avoided, meanwhile, the problem that the indoor temperature of the environment where the indoor unit is located in an existing hybrid heat pump device is likely to drop or rise slowly is solved, and the user comfort and the user experience are improved.

Description

Technical Field

[0001] This invention relates to the field of hybrid heat pump technology, and more specifically, to a control method, apparatus, and hybrid heat pump device. Background Technology

[0002] Existing hybrid heat pump systems typically use a three-way valve to switch between the heating and hot water circulation systems. When there is a demand for hot water, the heat pump output is prioritized for hot water production, stopping the output for heating. This can easily lead to a drop in room temperature, affecting user comfort. When heating stops, the circulating water temperature drops, and restarting heating results in a slow temperature rise. Furthermore, when there is a simultaneous demand for both heating and hot water, the systems usually alternate between heating and hot water modes, or prioritize either mode, sacrificing one. This can easily lead to insufficient water storage in the tank or fluctuations in indoor temperature. Frequent switching of heat sources also affects the lifespan of the equipment and reduces the user experience. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a control method, apparatus, and hybrid heat pump device. This method avoids the mutual interference between heating and hot water production, which could lead to insufficient water storage in the tank or fluctuations in indoor temperature. It also solves the problem of indoor temperature dropping or slow temperature rise in the environment where the indoor unit is located, which is common in existing hybrid heat pump devices, thereby improving user comfort and user experience.

[0004] According to an embodiment of the present invention, a control method for a hybrid heat pump device is provided, which is applied to a hybrid heat pump device, the hybrid heat pump device including a heat pump, a boiler, a water tank, an indoor unit, a three-way valve and a mixing valve, wherein the inlet of the three-way valve is connected to the outlet of the heat pump through a pipeline;

[0005] The first inlet of the mixing valve is connected to the first outlet of the three-way valve via a pipe, the second inlet of the mixing valve is connected to the outlet of the boiler via a pipe, and the outlet of the mixing valve is connected to the inlet of the indoor unit via a pipe.

[0006] The second outlet of the three-way valve is connected to the inlet of the heat exchange pipe of the water tank, and the outlets of the heat exchange pipe of the water tank are all connected to the inlets of the heat pump and the boiler via pipes. The outlets of the indoor unit are all connected to the inlets of the heat pump and the boiler via pipes. The control method of the hybrid heat pump device includes:

[0007] Obtain the operating mode of the hybrid heat pump device;

[0008] When the operating mode is simultaneous heating and hot water production mode, the first outlet of the three-way valve is closed, the inlet of the three-way valve is connected to the second outlet, and the heat pump is started to heat the water in the water tank.

[0009] The first inlet of the mixing valve is closed, the second inlet of the mixing valve is connected to the outlet of the mixing valve, and the boiler is started to heat the liquid flowing into the indoor unit.

[0010] By adopting the above technical solution, a three-way valve and a mixing valve are installed in the hybrid heat pump device, which can simultaneously produce hot water and heat water. The heat source for heating is the boiler, and the heat source for hot water is the heat pump. Heating and hot water production use independent heat sources, eliminating the need for frequent switching of heat sources, thus extending the service life of the equipment. This avoids the situation where heating and hot water production interfere with each other, leading to insufficient water storage in the water tank or fluctuations in indoor temperature. At the same time, it solves the problem of indoor temperature dropping or rising slowly in the environment where the indoor unit is located, which is common in existing hybrid heat pump devices, thus improving user comfort and user experience.

[0011] Preferably, the control method for the hybrid heat pump device further includes:

[0012] During the simultaneous heating and hot water production mode operation, the water temperature in the water tank is monitored;

[0013] When the water temperature in the water tank reaches the set temperature, the operating mode is switched to heating mode.

[0014] By adopting the above technical solution, when the water temperature in the water tank reaches the required temperature, the heat source of the indoor unit is switched from the boiler to the heat pump. This not only ensures the heating comfort of the indoor unit, but also avoids frequent switching of operating modes, which helps to extend the equipment's lifespan.

[0015] Preferably, the control method for the hybrid heat pump device further includes:

[0016] When the operating mode is heating mode, the second outlet of the three-way valve is closed, the inlet of the three-way valve is connected to the first outlet, and the heat pump is started to run.

[0017] Monitor the outdoor ambient temperature and control the operating status of the mixing valve and the boiler based on the outdoor ambient temperature.

[0018] By adopting the above technical solution, the heat pump is given priority as the heat source for the indoor unit in the heating mode, and the operation status of the boiler is controlled according to the outdoor ambient temperature, so as to balance the energy saving of the equipment and the comfort of the indoor environment.

[0019] Preferably, a temperature sensor is installed at the outlet of the mixing valve, and the step of controlling the operating status of the mixing valve and the boiler based on the outdoor ambient temperature includes:

[0020] If the outdoor ambient temperature is less than or equal to a preset temperature threshold, the boiler is controlled to start running to obtain the outlet water temperature detected by the temperature sensor.

[0021] The opening degree of the first and second inlets of the mixing valve is controlled based on the outlet water temperature.

[0022] By adopting the above technical solution, the boiler can be started when the outdoor ambient temperature is low, so as to avoid the indoor ambient temperature dropping or the heating rate rising slowly, thereby improving the comfort of the indoor ambient temperature. By controlling the opening ratio of the mixing valve according to the outlet water temperature, the opening ratio of the mixing valve is optimized, so as to provide users with a highly comfortable environment even in cold regions or during peak demand periods.

[0023] Preferably, the control method for the hybrid heat pump device further includes:

[0024] If the outdoor ambient temperature is greater than the preset temperature threshold, the boiler is controlled to stop operating, and the second inlet of the mixing valve is controlled to close.

[0025] By adopting the above technical solution, when the outdoor ambient temperature is high, the heating load of the indoor unit is low. By shutting down the boiler and cutting off the pipe switch from the boiler to the indoor unit, both comfort and energy efficiency of the equipment are taken into account.

[0026] Preferably, the control method for the hybrid heat pump device further includes:

[0027] When the operating mode is hot water production mode, the first outlet of the three-way valve is closed, the inlet of the three-way valve is connected to the second outlet, the heat pump is started, and the boiler is stopped.

[0028] Preferably, the control method for the hybrid heat pump device further includes:

[0029] When the operating mode is cooling mode, the inlet of the three-way valve is connected to the first outlet, the first inlet of the mixing valve is connected to the outlet, the heat pump is started, and the boiler is stopped.

[0030] Preferably, the control method for the hybrid heat pump device further includes:

[0031] When a stop operation command is received, the inlet of the three-way valve is connected to the first outlet, the first inlet of the mixing valve is connected to the outlet, the heat pump is stopped, and the boiler is stopped.

[0032] According to an embodiment of the present invention, another aspect provides a control device for a hybrid heat pump device, applied to a hybrid heat pump device, the hybrid heat pump device including a heat pump, a boiler, a water tank, an indoor unit, a three-way valve, and a mixing valve, wherein the inlet of the three-way valve is connected to the outlet of the heat pump via a pipe; the first inlet of the mixing valve is connected to the first outlet of the three-way valve via a pipe, the second inlet of the mixing valve is connected to the outlet of the boiler via a pipe, and the outlet of the mixing valve is connected to the inlet of the indoor unit via a pipe; the second outlet of the three-way valve is connected to the inlet of the heat exchange pipe of the water tank, the outlets of the heat exchange pipe of the water tank are all connected to the inlets of the heat pump and the boiler via pipes, and the outlets of the indoor unit are all connected to the inlets of the heat pump and the boiler via pipes; the control device for the hybrid heat pump device includes:

[0033] The acquisition module is used to acquire the operating mode of the hybrid heat pump device;

[0034] The first control module is used to control the first outlet of the three-way valve to close, control the inlet of the three-way valve to connect with the second outlet, and control the heat pump to start running when the operating mode is simultaneous heating and hot water production mode, so that the heat pump heats the water in the water tank.

[0035] The second control module is used to control the first inlet of the mixing valve to close, control the second inlet of the mixing valve to connect with the outlet of the mixing valve, and control the boiler to start running so that the boiler heats the liquid flowing into the indoor unit.

[0036] According to an embodiment of the present invention, another aspect provides a hybrid heat pump device, including a heat pump, a boiler, a water tank, an indoor unit, a three-way valve, a mixing valve, and a controller. The controller includes a computer-readable storage medium storing a computer program and a processor. The computer program is read and executed by the processor to implement the method as described in any of the first aspects.

[0037] The inlet of the three-way valve is connected to the outlet of the heat pump via a pipe;

[0038] The first inlet of the mixing valve is connected to the first outlet of the three-way valve via a pipe, the second inlet of the mixing valve is connected to the outlet of the boiler via a pipe, and the outlet of the mixing valve is connected to the inlet of the indoor unit via a pipe.

[0039] The second outlet of the three-way valve is connected to the inlet of the heat exchange pipe of the water tank. The outlets of the heat exchange pipe of the water tank are all connected to the inlets of the heat pump and the boiler through pipes. The outlets of the indoor unit are all connected to the inlets of the heat pump and the boiler through pipes.

[0040] The present invention has the following beneficial effects: by setting a three-way valve and a mixing valve in the hybrid heat pump device, heating can be carried out simultaneously during the hot water production process. The heat source for heating is a boiler, and the heat source for hot water production is a heat pump. Heating and hot water production use independent heat sources, eliminating the need for frequent switching of heat sources, thus extending the service life of the equipment. It can avoid the situation where heating and hot water production affect each other, resulting in insufficient water storage in the water tank or fluctuations in indoor temperature. At the same time, it solves the problem that the indoor unit of the existing hybrid heat pump device is prone to indoor temperature drop or slow temperature rise, thus improving user comfort and user experience. Attached Figure Description

[0041] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0042] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0043] Figure 1 This is a schematic diagram of a hybrid heat pump device provided by the present invention;

[0044] Figure 2 A flowchart of a control method for a hybrid heat pump device provided by the present invention;

[0045] Figure 3 A control flowchart of a hybrid heat pump device capable of simultaneously generating heat and hot water is provided by the present invention.

[0046] Figure 4 This is a schematic diagram of a hybrid heat pump device provided by the present invention. Detailed Implementation

[0047] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] This embodiment provides a hybrid heat pump device, see example... Figure 1 The schematic diagram of the hybrid heat pump device shown includes: heat pump 10, boiler 20, water tank 30, indoor unit 40, three-way valve 50, mixing valve 60 and controller 70. The inlet of the three-way valve is connected to the outlet of the heat pump through a pipe.

[0050] The controller 70 described above includes a computer-readable storage medium storing a computer program and a processor (not shown in the figure), the computer program being read and executed by the processor to implement the method provided in the following embodiments;

[0051] The first inlet of the mixing valve 60 is connected to the first outlet of the three-way valve 50 through a pipe, the second inlet of the mixing valve 60 is connected to the outlet of the boiler through a pipe, and the outlet of the mixing valve 60 is connected to the inlet of the indoor unit through a pipe.

[0052] The second outlet of the three-way valve 50 is connected to the inlet of the heat exchange pipe of the water tank 30. The outlets of the heat exchange pipes of the water tank 30 are all connected to the inlets of the heat pump 10 and the boiler 20 through pipes. The outlets of the indoor unit 40 are all connected to the inlets of the heat pump 10 and the boiler 20 through pipes.

[0053] like Figure 1 As shown, the heat pump 10 provided in this embodiment includes a plate heat exchanger 11 and an outdoor unit. The outdoor unit includes an outdoor heat exchanger 12, a four-way valve 13, and a compressor 14. The outlet of the outdoor heat exchanger 12 is connected to the first inlet of the plate heat exchanger 11 through a pipe, and the first outlet of the plate heat exchanger 11 is connected to the four-way valve 13 through a pipe. The first inlet and the first outlet of the plate heat exchanger 11 are connected inside the plate heat exchanger 11.

[0054] The second outlet of the plate heat exchanger 11 is connected to the inlet of the three-way valve 50 via a pipe. The second inlet of the plate heat exchanger 11 is connected to the outlets of the water tank 30 and the indoor unit 40. When the heat pump 10 is running, the outdoor unit heats the liquid flowing from the second outlet of the plate heat exchanger to the load equipment to meet the heating needs of the load equipment.

[0055] like Figure 1As shown, the heat pump 10 provided in this embodiment also includes a water pump 15, a third temperature sensor 16, and a fourth temperature sensor 17. The water pump 15 and the third temperature sensor 16 are disposed at the second inlet of the plate heat exchanger 11. The third temperature sensor 16 is used to detect the return liquid temperature of the heat pump 10. The water pump 15 is used to increase the heat exchange efficiency of the plate heat exchanger 11, thereby improving the heating efficiency of the system. The fourth temperature sensor 17 is disposed at the second outlet of the plate heat exchanger 11 and is used to detect the outlet liquid temperature of the heat pump. An expansion valve 18 is also disposed on the pipe between the outdoor heat exchanger 12 and the first inlet of the plate heat exchanger 11.

[0056] like Figure 1 As shown, the boiler 20 includes a water pump 21, a gas furnace, and heat exchange pipes. The gas furnace heats the liquid flowing through the heat exchange pipes. The water pump 21 is located at the boiler inlet and is used to detect the inlet liquid temperature.

[0057] like Figure 1 As shown, the heat pump also includes a heat pump control module 19, and the boiler 20 also includes a boiler control module 22. The controller 70 is communicatively connected to the heat pump control module 19 and the boiler control module 22 respectively, so as to control the heat pump 10 and the boiler 20 to start or stop operation respectively.

[0058] like Figure 1 As shown, the hybrid heat pump unit also includes: a floor heating system 80, with a temperature sensor 61 installed at the outlet of the mixing valve to detect the outlet water temperature. A two-way valve 41 is installed at the inlet of the indoor unit 40 to control the flow rate of liquid flowing into the indoor unit. A two-way valve 81 is also installed at the inlet of the floor heating system 80 to control the flow rate of liquid flowing into the floor heating radiator pipes. A differential valve 82 is also installed on the pipe between the inlet and outlet of the floor heating system 43.

[0059] This embodiment provides a control method for a hybrid heat pump device. This method can be applied to the hybrid heat pump device provided in the above embodiment, see below. Figure 2 The flowchart shown is a control method for a hybrid heat pump device. This method mainly includes the following steps S202 to S206:

[0060] Step S202: Obtain the operating mode of the hybrid heat pump unit;

[0061] Once the hybrid heat pump unit starts operating, the current operating mode of the hybrid heat pump unit is monitored. In one specific implementation, the operating mode command input by the user can be determined through a wired controller or other interactive device, and the operating mode of the hybrid heat pump unit is determined based on the operating mode command.

[0062] Step S204: When the operating mode is simultaneous heating and hot water production mode, the first outlet of the three-way valve is closed, the inlet and the second outlet of the three-way valve are connected, and the heat pump is started to run so that the heat pump heats the water in the water tank.

[0063] When the user sets the operating mode to simultaneous heating and hot water production, the heat source is distributed between the indoor heating unit and the water tank of the hot water production equipment. The heat pump is used as the heat source for hot water production. The first outlet of the three-way valve is closed to shut off the outlet of the heat pump to the indoor unit. The heat pump is then turned on to start operation. The inlet and second outlet of the three-way valve are opened to allow the liquid after heat exchange in the heat pump to flow into the heat exchange pipe of the water tank to heat the water in the tank.

[0064] Step S206: Close the first inlet of the mixing valve, connect the second inlet of the mixing valve to the outlet of the mixing valve, and start the boiler to heat the liquid flowing into the indoor unit.

[0065] When the user sets the operating mode to simultaneous heating and hot water production, the first inlet of the mixing valve is closed to prevent the liquid after heat exchange in the boiler from entering the water tank, and the liquid after heat exchange in the heat pump is also prevented from entering the indoor unit. The boiler is then started to operate, serving as the heat source for the indoor unit and underfloor heating. The second inlet and outlet of the mixing valve are then opened to allow the liquid after heat exchange in the boiler to enter the indoor unit and underfloor heating.

[0066] The control method for the hybrid heat pump device provided in this embodiment, by setting a three-way valve and a mixing valve in the hybrid heat pump device, can simultaneously produce hot water and heat water. The heat source for heating is a boiler, and the heat source for hot water is a heat pump. Heating and hot water production both use independent heat sources, eliminating the need for frequent switching of heat sources, thus extending the service life of the equipment. It can avoid the situation where heating and hot water production affect each other, leading to insufficient water storage in the water tank or fluctuations in indoor temperature. At the same time, it solves the problem that the indoor unit of existing hybrid heat pump devices is prone to indoor temperature drop or slow temperature rise, thus improving user comfort and user experience.

[0067] In one embodiment, the control method for the hybrid heat pump device provided in this embodiment further includes:

[0068] During simultaneous heating and hot water production, the water temperature in the tank is monitored; when the water temperature in the tank reaches the set temperature, the operating mode is switched to heating mode.

[0069] When a hybrid heat pump unit operates in simultaneous heating and hot water production mode, a temperature sensor installed in the water tank monitors the water temperature in real time. When the water temperature in the tank is greater than or equal to the set temperature, indicating that the water temperature meets the requirements, the operating mode of the hybrid heat pump unit is switched from simultaneous heating and hot water production mode to heating mode, so that the heat pump acts as the heat source for the indoor unit. This avoids unnecessary hot water heating, thereby enhancing the heating capacity.

[0070] By switching the heat source of the indoor unit from the boiler to the heat pump when the water temperature in the tank reaches the required temperature, the heating comfort of the indoor unit can be guaranteed, and frequent switching of operating modes can be avoided, which helps to extend the life of the equipment.

[0071] In one embodiment, the control method for the hybrid heat pump device provided in this embodiment further includes:

[0072] When the operating mode is heating mode, the second outlet of the control three-way valve is closed, the inlet of the control three-way valve is connected to the first outlet, and the heat pump starts to run.

[0073] Monitor outdoor ambient temperature and control the operation of mixing valve and boiler based on outdoor ambient temperature.

[0074] In the heating mode of a hybrid heat pump unit, the heat pump is primarily used as the heat source for the indoor unit. The second outlet of the three-way valve is closed, while both the inlet and first outlet of the three-way valve are open. Simultaneously, both the first inlet and outlet of the mixing valve are open, allowing the heat-exchanged liquid from the heat pump to flow into the indoor unit. The outdoor ambient temperature is also monitored, and the boiler's operation is determined based on this temperature. By prioritizing the heat pump as the heat source for the indoor unit in heating mode, and then controlling the boiler's operation based on the outdoor ambient temperature, both energy efficiency and indoor comfort are balanced.

[0075] In one specific implementation, if the outdoor ambient temperature is less than or equal to a preset temperature threshold, the boiler is controlled to start running and the outlet water temperature detected by the temperature sensor is obtained; the opening degree of the first and second inlets of the mixing valve is controlled based on the outlet water temperature.

[0076] When the outdoor ambient temperature is low, the indoor unit's heating load is high. By turning on the boiler, the indoor ambient temperature is prevented from dropping or the heating rate from rising slowly, thus improving indoor temperature comfort. The opening degree of the first and second inlets of the mixing valve can be controlled according to the outdoor ambient temperature and the outlet water temperature. For example, when the outlet water temperature is low, the valve opening at the second inlet is increased; when the outlet water temperature is high, the valve opening at the second inlet is decreased. This ensures that the outlet water temperature of the mixing valve reaches the set temperature to meet the heating demand of the indoor unit, optimizing the opening ratio of the mixing valve. Even in cold regions or during peak demand periods, a highly comfortable environment can be provided to users. When the indoor unit's heating load is high, the boiler side opening ratio of the mixing valve is increased. When the hot water load is high, the heat pump side is used to heat the water in the tank first.

[0077] In one specific implementation, if the outdoor ambient temperature is greater than a preset temperature threshold, the boiler is controlled to stop operating, and the second inlet of the mixing valve is controlled to close.

[0078] When the outdoor ambient temperature is high, the heating load of the indoor unit is low. By turning off the boiler and cutting off the pipe switch from the boiler to the indoor unit, both comfort and energy efficiency of the equipment are taken into account.

[0079] The preset temperature threshold can be in the range of -10℃ to 0℃, preferably -5℃.

[0080] In one embodiment, the control method for the hybrid heat pump device provided in this embodiment further includes:

[0081] When the operating mode is hot water production mode, the first outlet of the control three-way valve is closed, the inlet and second outlet of the control three-way valve are connected, the heat pump is started, and the boiler is stopped.

[0082] When the operating mode is hot water mode, the heat pump starts running, the boiler stops running, the first outlet of the three-way valve is closed, the connection between the heat pump and the indoor unit is cut off, so that the liquid after heat exchange in the heat pump flows only into the water tank to heat the water in the tank.

[0083] In one embodiment, the control method for the hybrid heat pump device provided in this embodiment further includes:

[0084] When the operating mode is cooling mode, the inlet and first outlet of the three-way valve are connected, the first inlet and outlet of the mixing valve are connected, the heat pump is started, and the boiler is stopped.

[0085] When the operating mode is cooling mode, the heat pump starts running, the boiler stops running, the inlet and first outlet of the three-way valve open, and the first inlet and outlet of the mixing valve open, so that the liquid after heat exchange in the heat pump can only flow into the indoor unit to meet the user's cooling needs and improve the user's comfort.

[0086] In one embodiment, the control method for the hybrid heat pump device provided in this embodiment further includes:

[0087] When a stop operation command is received, the inlet and first outlet of the three-way valve are connected, the first inlet and outlet of the mixing valve are connected, the heat pump is stopped, and the boiler is stopped.

[0088] When a stop command is received from the user, the inlet and first outlet of the three-way valve are opened, the first inlet and outlet of the mixing valve are opened, the heat pump stops running, and the boiler stops running.

[0089] The control method of the hybrid heat pump device provided in this embodiment can achieve uninterrupted heating during the hot water production process, preventing problems such as room temperature drop or slow heating temperature rise; at the same time, it can avoid frequent switching of operating modes, which helps to extend the equipment life; it can also achieve stable operation in cold regions or under high load conditions, taking into account energy saving and comfort, and providing users with a highly comfortable environment even in cold regions or during peak demand periods.

[0090] Corresponding to the control method for the hybrid heat pump device provided in the above embodiments, this embodiment of the invention provides an example of controlling a hybrid heat pump device capable of simultaneously producing heat and hot water using the control method described above, see example... Figure 3 The control flowchart shown is for a hybrid heat pump unit that can simultaneously produce heat and hot water. The specific steps are as follows:

[0091] Step 1: Determine the operating mode of the hybrid heat pump unit based on the settings of the wired controller;

[0092] Step 2: When the operating mode is heating mode, control the heat pump to run, control the three-way valve to switch to the indoor unit side (i.e., control the second outlet of the three-way valve to close, control the inlet of the three-way valve to connect with the first outlet), control the mixing valve to switch to the heat pump side, or control the opening of the first inlet of the mixing valve based on the outlet water temperature of the mixing valve, so as to achieve heating operation.

[0093] Determine if the outdoor ambient temperature is less than or equal to -5℃. If so, allow the boiler to operate and control the opening of the first and second inlets of the mixing valve based on the outlet water temperature of the mixing valve. If the outdoor ambient temperature is greater than -5℃, control the boiler to stop operating, control the second inlet of the mixing valve to close, and control the first inlet and outlet of the mixing valve to open, that is, control the mixing valve to work on the heat pump side.

[0094] Step 3: When the operating mode is hot water mode, control the three-way valve to work on the hot water side, that is, control the first outlet of the three-way valve to close, control the inlet and the second outlet of the three-way valve to be connected, control the heat pump to start running, and control the boiler to stop running; control the mixing valve to work on the heat pump side, that is, control the first inlet of the mixing valve to close.

[0095] Step 4: When the operating mode is simultaneous heating and hot water production, control the three-way valve to work on the hot water production side, that is, control the first outlet of the three-way valve to be closed, control the inlet and the second outlet of the three-way valve to be connected, control the heat pump to start running, and control the boiler to start running; control the mixing valve to work on the boiler side, that is, control the first inlet of the mixing valve to be closed, and control the second inlet and outlet of the mixing valve to be open.

[0096] Step 5: When the operating mode is cooling mode, control the three-way valve to work on the indoor unit side, that is, control the second outlet of the three-way valve to close, control the inlet of the three-way valve to be connected to the first outlet, control the mixing valve to work on the heat pump side, that is, control the first inlet of the mixing valve to be connected to the outlet, control the heat pump to start running, and control the boiler to stop running.

[0097] Step 6: When a stop operation command is received, control the three-way valve to work on the indoor unit side, that is, control the inlet and the first outlet of the three-way valve to be connected, control the mixing valve to work on the heat pump side, that is, control the first inlet and the outlet of the mixing valve to be connected, control the heat pump to stop running, and control the boiler to stop running.

[0098] Corresponding to the control method of the hybrid heat pump device provided in the above embodiments, this embodiment of the invention provides a control device for a hybrid heat pump device. This device can be applied to the hybrid heat pump device provided in the above embodiments, see below. Figure 4 The schematic diagram shown illustrates a hybrid heat pump device, which includes the following modules:

[0099] Acquisition module 41 is used to acquire the operating mode of the hybrid heat pump device;

[0100] The first control module 42 is used to control the first outlet of the three-way valve to close, control the inlet and the second outlet of the three-way valve to connect, and control the heat pump to start running when the operating mode is simultaneous heating and hot water production mode, so that the heat pump heats the water in the water tank.

[0101] The second control module 43 is used to control the first inlet of the mixing valve to close, control the second inlet of the mixing valve to connect with the outlet of the mixing valve, and control the boiler to start running so that the boiler heats the liquid flowing into the indoor unit.

[0102] The control device for the hybrid heat pump device provided in this embodiment, by setting a three-way valve and a mixing valve in the hybrid heat pump device, can simultaneously generate heat during the hot water production process. The heat source for heating is a boiler, and the heat source for hot water is a heat pump. Heating and hot water production both use independent heat sources, eliminating the need for frequent switching of heat sources, thus extending the service life of the equipment. It can avoid the situation where heating and hot water production affect each other, leading to insufficient water storage in the water tank or fluctuations in indoor temperature. At the same time, it solves the problem that the indoor unit of existing hybrid heat pump devices is prone to indoor temperature drop or slow temperature rise, improving user comfort and user experience.

[0103] This embodiment also provides a computer-readable storage medium storing a computer program. When executed by a processor, this computer program implements the various processes of the control method embodiment for the hybrid heat pump device described above, and achieves the same technical effect. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0104] Of course, those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by computer-controlled devices. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The storage medium can be a memory, a disk, an optical disk, etc.

[0105] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0106] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0107] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Regarding the control device and hybrid heat pump device disclosed in the embodiments, since they correspond to the control method of the hybrid heat pump device disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0108] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0109] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A control method for a hybrid heat pump device, characterized in that, This is applied to a hybrid heat pump device, which includes a heat pump, a boiler, a water tank, an indoor unit, a three-way valve, and a mixing valve. The inlet of the three-way valve is connected to the outlet of the heat pump via a pipe. The first inlet of the mixing valve is connected to the first outlet of the three-way valve via a pipe, the second inlet of the mixing valve is connected to the outlet of the boiler via a pipe, and the outlet of the mixing valve is connected to the inlet of the indoor unit via a pipe. The second outlet of the three-way valve is connected to the inlet of the heat exchange pipe of the water tank, and the outlets of the heat exchange pipe of the water tank are all connected to the inlets of the heat pump and the boiler via pipes. The outlets of the indoor unit are all connected to the inlets of the heat pump and the boiler via pipes. The control method of the hybrid heat pump device includes: Obtain the operating mode of the hybrid heat pump device; When the operating mode is simultaneous heating and hot water production mode, the first outlet of the three-way valve is closed, the inlet of the three-way valve is connected to the second outlet, and the heat pump is started to heat the water in the water tank. The first inlet of the mixing valve is closed, the second inlet of the mixing valve is connected to the outlet of the mixing valve, and the boiler is started to heat the liquid flowing into the indoor unit.

2. The control method as described in claim 1, characterized in that, Also includes: During the simultaneous heating and hot water production mode operation, the water temperature in the water tank is monitored; When the water temperature in the water tank reaches the set temperature, the operating mode is switched to heating mode.

3. The control method as described in claim 1 or 2, characterized in that, Also includes: When the operating mode is heating mode, the second outlet of the three-way valve is closed, the inlet of the three-way valve is connected to the first outlet, and the heat pump is started to run. Monitor the outdoor ambient temperature and control the operating status of the mixing valve and the boiler based on the outdoor ambient temperature.

4. The control method as described in claim 3, characterized in that, A temperature sensor is installed at the outlet of the mixing valve. The step of controlling the operating status of the mixing valve and the boiler based on the outdoor ambient temperature includes: If the outdoor ambient temperature is less than or equal to a preset temperature threshold, the boiler is controlled to start running to obtain the outlet water temperature detected by the temperature sensor. The opening degree of the first and second inlets of the mixing valve is controlled based on the outlet water temperature.

5. The control method as described in claim 4, characterized in that, Also includes: If the outdoor ambient temperature is greater than the preset temperature threshold, the boiler is controlled to stop operating, and the second inlet of the mixing valve is controlled to close.

6. The control method as described in claim 1, characterized in that, Also includes: When the operating mode is hot water production mode, the first outlet of the three-way valve is closed, the inlet of the three-way valve is connected to the second outlet, the heat pump is started, and the boiler is stopped.

7. The control method as described in claim 1, characterized in that, Also includes: When the operating mode is cooling mode, the inlet of the three-way valve is connected to the first outlet, the first inlet of the mixing valve is connected to the outlet, the heat pump is started, and the boiler is stopped.

8. The control method as described in claim 1, characterized in that, Also includes: When a stop operation command is received, the inlet of the three-way valve is connected to the first outlet, the first inlet of the mixing valve is connected to the outlet, the heat pump is stopped, and the boiler is stopped.

9. A control device for a hybrid heat pump unit, characterized in that, This invention relates to a hybrid heat pump system, comprising a heat pump, a boiler, a water tank, an indoor unit, a three-way valve, and a mixing valve. The inlet of the three-way valve is connected to the outlet of the heat pump via a pipe. The first inlet of the mixing valve is connected to the first outlet of the three-way valve via a pipe. The second inlet of the mixing valve is connected to the outlet of the boiler via a pipe. The outlet of the mixing valve is connected to the inlet of the indoor unit via a pipe. The second outlet of the three-way valve is connected to the inlet of the heat exchange pipe of the water tank. The outlets of the heat exchange pipe of the water tank are all connected to the inlets of the heat pump and the boiler via pipes. The outlets of the indoor unit are all connected to the inlets of the heat pump and the boiler via pipes. The control device for the hybrid heat pump system includes: The acquisition module is used to acquire the operating mode of the hybrid heat pump device; The first control module is used to control the first outlet of the three-way valve to close, control the inlet of the three-way valve to connect with the second outlet, and control the heat pump to start running when the operating mode is simultaneous heating and hot water production mode, so that the heat pump heats the water in the water tank. The second control module is used to control the first inlet of the mixing valve to close, control the second inlet of the mixing valve to connect with the outlet of the mixing valve, and control the boiler to start running so that the boiler heats the liquid flowing into the indoor unit.

10. A hybrid heat pump device, characterized in that, The system includes a heat pump, a boiler, a water tank, an indoor unit, a three-way valve, a mixing valve, and a controller. The controller includes a computer-readable storage medium storing a computer program and a processor. The computer program is read and executed by the processor to implement the method as described in any one of claims 1-8. The inlet of the three-way valve is connected to the outlet of the heat pump via a pipe; The first inlet of the mixing valve is connected to the first outlet of the three-way valve via a pipe, the second inlet of the mixing valve is connected to the outlet of the boiler via a pipe, and the outlet of the mixing valve is connected to the inlet of the indoor unit via a pipe. The second outlet of the three-way valve is connected to the inlet of the heat exchange pipe of the water tank. The outlets of the heat exchange pipe of the water tank are all connected to the inlets of the heat pump and the boiler through pipes. The outlets of the indoor unit are all connected to the inlets of the heat pump and the boiler through pipes.

Images