Photovoltaic power consumption based heat pump control method, device, system and storage medium

Abstract

The application discloses a heat pump control method, device and system based on photovoltaic consumption and a storage medium. The method comprises the following steps: acquiring first information, wherein the first information is used for indicating whether there is a space heating demand; determining that there is the space heating demand based on the first information, and controlling the heat pump to switch from operating a hot water heating function to operating a space heating function; determining that there is no space heating demand based on the first information, and controlling the heat pump to operate the hot water heating function. In this way, when a user has a space heating demand, the heat pump based on photovoltaic consumption is switched from operating the hot water heating function to operating the space heating function, the space heating demand of the user is met, the comfort of the user during photovoltaic consumption is improved, and the use experience of the user is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating control, and in particular to a heat pump control method, device, system and storage medium based on photovoltaic consumption. BACKGROUND

[0002] A heat pump generally refers to an air energy heat pump or an air source heat pump, which can convert low-grade heat energy (such as heat contained in air) that cannot be directly utilized into high-grade heat energy that can be utilized, thereby achieving the purpose of energy saving.

[0003] In related technologies, an air-to-water (ATW) heat pump can have two operating modes. One is hot water priority, and the heat pump is switched to operate the hot water function when there is a demand for hot water. The other is non-hot water priority, and the heat pump is switched to operate the space heating function when there is a demand for space heating. At this time, if there is a demand for hot water, the heat pump uses electric heating function to operate the hot water function. Based on the photovoltaic consumption heat pump operation control method, the usual practice is to set the water temperature of the domestic hot water tank to the upper limit value (such as 70℃) when the photovoltaic surplus power reaches a certain threshold, and at the same time, the electric heating function in the water tank is started, so as to consume the photovoltaic power in the form of hot water energy storage.

[0004] The above control method still has disadvantages, for example, when the photovoltaic surplus power reaches a certain threshold, only the hot water function can be operated to consume the photovoltaic excess power, and it is impossible to switch from operating the hot water function to operating the space heating function when the user has a demand for space heating, so as to meet the user's demand for space heating, causing the user to be uncomfortable and reducing the user's experience. SUMMARY

[0005] To solve the existing technical problems, the present application provides a heat pump control method, device, system and storage medium based on photovoltaic consumption.

[0006] The technical solution of the present application is as follows:

[0007] In a first aspect, the present application provides a heat pump control method based on photovoltaic consumption, applied to a photovoltaic consumption system, the photovoltaic consumption system comprising: a photovoltaic assembly, an energy storage unit, a heat pump and an inverter, the photovoltaic assembly generating photovoltaic excess power and storing it in the energy storage unit, the inverter controlling the heat pump to consume the photovoltaic excess power; the method comprising:

[0008] Obtaining first information, the first information being used to indicate whether there is a demand for space heating;

[0009] Based on the first information, it is determined that there is a demand for space heating, and the heat pump is controlled to switch from operating the hot water function to operating the space heating function;

[0010] determining, based on the first information, that the space heating demand is not met, controlling the heat pump to operate the hot water heating function.

[0011] In the above scheme, the control of the heat pump from operating the hot water heating function to operating the space heating function comprises:

[0012] determining that the current set water temperature value of the hot water tank in the heat pump is an upper limit water temperature value, and then restoring the current set water temperature value of the hot water tank to a target set water temperature value; and / or,

[0013] determining that the hot water tank in the heat pump has started an electric heating function, and then closing the electric heating function.

[0014] In the above scheme, the control of the heat pump to operate the hot water heating function comprises:

[0015] obtaining an operating state of the hot water heating function of the heat pump;

[0016] determining that the hot water heating function of the heat pump is in a standby state, and then starting the hot water heating function of the heat pump;

[0017] determining that the hot water heating function of the heat pump is in an operating state, and then absorbing the photovoltaic residual electricity through the hot water heating function.

[0018] In the above scheme, the determination that the hot water heating function of the heat pump is in a standby state, and then starting the hot water heating function of the heat pump comprises:

[0019] determining that the heat pump does not meet a first condition, and then restoring a current set water temperature of a hot water tank in the heat pump to a target set water temperature; and / or,

[0020] determining that the hot water tank in the heat pump has started an electric heating function, and then closing the electric heating function.

[0021] determining that the heat pump meets the first condition and a compressor of the heat pump cannot be started, and then setting the current set water temperature value of the hot water tank in the heat pump to an upper limit water temperature value, and starting the electric heating function.

[0022] determining that the heat pump meets the first condition and the compressor of the heat pump can be started, and then setting the current set water temperature value of the hot water tank in the heat pump to an upper limit water temperature value.

[0023] The first condition comprises:

[0024] a remaining capacity of the energy storage unit is greater than or equal to a starting capacity threshold; and,

[0025] a grid-connected power of the photovoltaic residual electricity is greater than or equal to a first power threshold.

[0026] In the above solution, when it is determined that the hot water heating function of the heat pump is in operation, the photovoltaic excess electricity is consumed by the hot water heating function.

[0027] When it is determined that the heat pump meets a first condition, a current set water temperature value of a hot water tank in the heat pump is set as an upper limit water temperature value, and the photovoltaic excess electricity is consumed by the hot water heating function.

[0028] When it is determined that the heat pump does not meet the first condition, meets a second condition, and the current set water temperature value of the hot water tank is the upper limit water temperature value, the current set water temperature value of the hot water tank is restored to a target set water temperature; and / or,

[0029] When it is determined that the hot water tank in the heat pump has started an electric heating function, the electric heating function is turned off.

[0030] The first condition includes:

[0031] The remaining capacity of the energy storage unit is greater than or equal to a start capacity threshold; and

[0032] The grid-connected power of the photovoltaic excess electricity is greater than or equal to a first power threshold.

[0033] The second condition includes at least one of the following:

[0034] The remaining capacity of the energy storage unit is less than an end capacity threshold.

[0035] The power of the photovoltaic excess electricity is greater than or equal to a second power threshold.

[0036] In a second aspect, an embodiment of the present application provides a photovoltaic consumption system, which includes:

[0037] A photovoltaic assembly for generating photovoltaic excess electricity and storing the photovoltaic excess electricity in an energy storage unit;

[0038] An energy storage unit for storing the photovoltaic excess electricity generated by the photovoltaic assembly; and a heat pump for operating a hot water heating function or a space heating function.

[0039] An inverter for controlling the heat pump to consume the photovoltaic excess electricity generated by the photovoltaic assembly in the energy storage unit and performing the steps of the method of the first aspect of the present application.

[0040] In the above solution, the heat pump further includes a wire control device, which receives an external instruction, determines whether there is a space heating demand according to the external instruction, and sends first information to the inverter.

[0041] In the scheme, the heat pump further comprises a hot water tank and a water tank electric heating assembly, the water tank electric heating assembly is located in the hot water tank, and the inverter controls the heat pump to start the hot water heating function by setting the current set water temperature value of the hot water tank as an upper limit water temperature value and / or starting the water tank electric heating assembly.

[0042] The inverter controls the heat pump to stop the hot water heating function by restoring the upper limit water temperature value of the hot water tank to a target set water temperature value and / or stopping the water tank electric heating assembly.

[0043] In the scheme, the heat pump further comprises a heat pump outdoor unit, and a compressor is located in the heat pump outdoor unit, and the inverter controls the heat pump to start the hot water heating function by setting the current set water temperature value of the hot water tank as an upper limit water temperature value and / or starting the compressor.

[0044] In the scheme, the heat pump further comprises an electric three-way valve, and the inverter controls the heat pump to switch between the hot water heating function and the space heating function through the electric three-way valve.

[0045] In a third aspect, an embodiment of the present application provides a control device of a photovoltaic power consumption system, the device comprising: an acquisition module, a first control module and a second control module; wherein the acquisition module is configured to acquire first information, the first information being used to indicate whether there is a space heating demand;

[0046] The first control module is configured to determine, based on the first information, that there is the space heating demand, and control the heat pump to switch from operating a hot water heating function to operating a space heating function.

[0047] The second control module is configured to determine, based on the first information, that there is no space heating demand, and control the heat pump to operate the hot water heating function.

[0048] In a fourth aspect, an embodiment of the present application further provides a heat pump control device based on photovoltaic power consumption, comprising a network interface, a memory and a processor; wherein the network interface is configured to realize connection and communication between components; the memory is configured to store a computer program capable of running on the processor; and the processor is configured to execute the steps of the method of the first aspect of the present application when running the computer program.

[0049] In a fifth aspect, an embodiment of the present application provides a storage medium, the storage medium storing a computer program, and the computer program is executed by a processor to realize the steps of the method of the first aspect of the present application.

[0050] The technical scheme provided by the embodiment of the present application is a heat pump control method based on photovoltaic consumption, applied to a photovoltaic consumption system, the photovoltaic consumption system comprising: a photovoltaic assembly, an energy storage unit, a heat pump, and an inverter, the photovoltaic assembly generates photovoltaic residual power and stores the photovoltaic residual power in the energy storage unit, and the inverter controls the heat pump to consume the photovoltaic residual power; the method comprises: obtaining first information, the first information being used to indicate whether there is a space heating demand; determining that there is the space heating demand based on the first information, and controlling the heat pump to switch from operating a hot water heating function to operating a space heating function; and determining that there is no space heating demand based on the first information, and controlling the heat pump to operate the hot water heating function. In this way, when a user has a space heating demand, the heat pump for photovoltaic consumption switches from operating a hot water heating function to operating a space heating function, the space heating demand of the user is met, the comfort of the user during photovoltaic consumption is improved, and the use experience of the user is improved. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 A flowchart of a heat pump control method based on photovoltaic consumption provided by the embodiment of the present application is shown in the figure;

[0052] Figure 2 A flowchart of a heat pump control method based on photovoltaic consumption provided by the embodiment of the present application is shown in the figure;

[0053] Figure 3 A structural diagram of a photovoltaic consumption system provided by the embodiment of the present application is shown in the figure;

[0054] Figure 4 A structural diagram of an ATW heat pump provided by the embodiment of the present application is shown in the figure;

[0055] Figure 5 A structural diagram of a control device of a photovoltaic consumption system provided by the embodiment of the present application is shown in the figure;

[0056] Figure 6 A structural diagram of a heat pump control device based on photovoltaic consumption provided by the embodiment of the present application is shown in the figure.

[0057] Explanation of reference signs:

[0058] 301, photovoltaic assembly; 302, energy storage unit; 303, inverter; 304, power distribution cabinet; 305, air-water ATW heat pump; 306, power sensor; 307, power grid;

[0059] 401, integrated ATW heat pump outdoor unit; 402, line controller; 403, domestic hot water tank; 404, water tank electric heating; 405, electric three-way valve; 406, balance water tank; 407, expansion tank; 408, floor heating. DETAILED DESCRIPTION

[0060] In the related art, a photovoltaic consumption based heat pump control method is provided. In the method, when it is determined that the photovoltaic surplus power reaches a certain threshold, the electric heating function or the compressor heating function is started to run the hot water heating function, so as to raise the set water temperature in the hot water tank to an upper limit value (such as 70 DEG C), and the energy is preferentially stored through the hot water heating function to consume the photovoltaic residual power, so as to realize the hot water heating by using free electricity. However, the above method has the following problems:

[0061] Firstly, the photovoltaic residual power can only be consumed through the hot water heating function after the photovoltaic surplus power reaches a certain threshold, and the consumption strategy of the photovoltaic residual power does not consider the actual life demand of the user, so that the hot water heating function cannot be switched to the space heating function to meet the space heating demand of the user when the user has the space heating demand, thereby causing the discomfort of the user and reducing the use experience of the user.

[0062] Secondly, when the photovoltaic residual power is consumed through the running of the hot water heating function, the user cannot freely select the electric heating function or the compressor heating function, and the energy efficiency of the electric heating function is lower than that of the compressor heating function, so that the photovoltaic residual power is greatly consumed when the hot water is heated by using the electric heating function, thereby reducing the income of the photovoltaic residual power on the grid.

[0063] Therefore, in various embodiments of the present application, a photovoltaic consumption based heat pump control method is provided, which is applied to a photovoltaic consumption system. The photovoltaic consumption system comprises a photovoltaic assembly, an energy storage unit, a heat pump and an inverter. The photovoltaic assembly generates photovoltaic residual power and stores the photovoltaic residual power in the energy storage unit. The inverter controls the heat pump to consume the photovoltaic residual power. The method comprises the following steps: obtaining first information, the first information being used to indicate whether there is a space heating demand; determining that there is the space heating demand based on the first information, and controlling the heat pump to switch from running a hot water heating function to running a space heating function; and determining that there is no space heating demand based on the first information, and controlling the heat pump to run the hot water heating function.

[0064] The present application will be further described in detail in conjunction with the embodiments.

[0065] Figure 1 A flowchart of a photovoltaic consumption based heat pump control method provided by the embodiments of the present application is shown in the figure. As shown in the figure, the method comprises the following steps:

[0066] Step 101: obtaining first information, the first information being used to indicate whether there is a space heating demand;

[0067] Step 102: determining that there is the space heating demand based on the first information, and controlling the heat pump to switch from running a hot water heating function to running a space heating function;

[0068] Step 103, based on the first information, determining that there is no space heating demand, and controlling the heat pump to operate the hot water heating function.

[0069] Specifically, the method is applied to a photovoltaic (PV) consumption system, which includes a PV assembly, an energy storage unit, a heat pump, and an inverter. The PV assembly generates PV surplus electricity and stores it in the energy storage unit. The inverter controls the heat pump to consume the PV surplus electricity. The inverter acquires first information, determines whether there is a space heating demand based on the first information, and controls the PV consumption system to operate a hot water heating function or a space heating function to consume the PV surplus electricity according to the space heating demand.

[0070] In one possible implementation, the method can be applied to an inverter integrated in a PV consumption system. The inverter can receive and send information through a built-in communication module to control the heat pump to consume the PV surplus electricity. For example, the communication module in the inverter can include, but is not limited to, a 4G communication module, a WIFI communication module, a Bluetooth communication module, a LAN communication module, an RS485 communication module, and the like.

[0071] In one possible implementation, the method can also be used for a controller that is not integrated in a PV consumption system to control the heat pump to consume the PV surplus electricity.

[0072] Here, the heat pump can be a mechanical device that obtains low-grade heat energy from air, water, or soil in nature, and converts it into high-grade heat energy through work consumption. The low-grade heat energy can be difficult to utilize, and can include, but is not limited to, seawater heat energy, geothermal heat energy, solar energy, and the like. The high-grade heat energy can be easy to utilize, and can include, but is not limited to, solid fuel heat energy, electric heat energy, mechanical work heat energy, and the like.

[0073] In one possible implementation, according to different environmental heat exchange media, the heat pump can include, but is not limited to, a water-to-water (WTW) heat pump, a water-to-air (WTA) heat pump, an air-to-water (ATW) heat pump, and an air-to-air (ATA) heat pump.

[0074] In one possible implementation, the heat pump in the photovoltaic power consumption system can adopt an ATW heat pump, which absorbs air, compresses the air into high-temperature and high-pressure liquid as a heat source, and the functions of the ATW heat pump can include but are not limited to: space heating function and hot water heating function. Among them, the space heating mode can include but is not limited to: air conditioning, floor heating, etc., which are used to control the ambient temperature. The hot water heating function can include but is not limited to: electric heating function and compressor heating function, which are used to heat the water in the hot water tank.

[0075] Among them, the ATW heat pump is connected or provided with a hot water tank (for storing water to be heated), and the electric heating function can be realized by: providing a water tank electric heating assembly in the water tank, which generates heat in the power-on state and transfers to the surrounding water, thereby raising the water temperature. The compressor heating function can be realized by: compressing the air at normal temperature and low pressure into high-temperature and high-pressure gas by the compressor, and the high-temperature and high-pressure gas heats the water to be heated in the water tank; then the compressor condenses the high-temperature and high-pressure gas into liquid, and the liquid enters the evaporator in the compressor to absorb heat and evaporate into gas and then into high-pressure and low-temperature gas by the compressor. The energy efficiency of the compressor heating function is higher than that of the electric heating function, and the compressor heating function can more efficiently meet the user's hot water heating demand.

[0076] In addition, during the operation of the ATW heat pump, the space heating function and the hot water heating function cannot be operated at the same time at the same time; when the space heating function is running, the hot water heating function is in standby state; when the hot water heating function is running, the space heating function is in standby state; a user with space heating demand can send an external instruction to control the ATW heat pump to switch from running the hot water heating function to running the space heating function.

[0077] In some embodiments, the control of the heat pump from running the hot water heating function to running the space heating function comprises:

[0078] determining that the current set water temperature value of the hot water tank in the heat pump is an upper limit water temperature value, and then restoring the current set water temperature value of the hot water tank to a target set water temperature value; and / or,

[0079] determining that the hot water tank in the heat pump has started the electric heating function, and then closing the electric heating function.

[0080] Specifically, after receiving the first information of the space heating demand, the inverter determines whether the current set water temperature value of the hot water tank in the ATW heat pump is an upper limit water temperature value, and / or whether the hot water tank has started the electric heating function;

[0081] If the current set water temperature value of the hot water tank is the upper limit water temperature value and the electric heating function is turned on, it indicates that the ATW heat pump is currently in a state of running the hot water heating function through the electric heating function, and the ATW heat pump needs to be controlled to turn off the electric heating function and restore the current set water temperature value to the target set water temperature value, exit the hot water heating function, and switch to run the space heating function;

[0082] If the current set water temperature value of the hot water tank is the upper limit water temperature value and the electric heating function is not turned on, it indicates that the ATW heat pump is currently in a state of running the hot water heating function through the compressor heating function, and the ATW heat pump needs to be controlled to restore the current set water temperature value to the target set water temperature value, exit the hot water heating function, and switch to run the space heating function;

[0083] If the current set water temperature value of the hot water tank is not the upper limit water temperature value, it indicates that the ATW heat pump is not currently running the hot water heating function, and directly runs the space heating function.

[0084] Here, the current set water temperature value in the hot water tank can be a temperature that the user can set for the ATW heat pump, and can be a pre-set temperature value. The ATW heat pump heats the water stored in the hot water tank according to the current set water temperature value. In the embodiments of the present application, the value of the current set water temperature value is not specifically limited and can be set according to actual application requirements. For example, the current set water temperature value can be 40 degrees Celsius. The target set water temperature value can be the default value of the current set water temperature value, and the upper limit water temperature value can be the temperature value of the current set water temperature value after being set again by the user. The specific values of the target set water temperature value and the upper limit water temperature value can be set according to actual application requirements, which are not specifically limited here.

[0085] For example, the target set water temperature value of the ATW heat pump is 40 degrees Celsius, and the current set water temperature value is 40 degrees Celsius at this time. The current set water temperature value is set to the upper limit water temperature value (such as 70 degrees Celsius), and the current set water temperature value is 70 degrees Celsius. The current set water temperature value is restored to the target set water temperature value, and the current set water temperature value is 40 degrees Celsius.

[0086] Adjusting the current set water temperature value to the target set water temperature value can be through cooling or heating. Cooling can be through turning off the hot water heating function and waiting for the water in the tank to cool down. Heating can be through continuing to run the hot water heating function to heat the current set water temperature value to the target set water temperature value. The way of heating the current set water temperature value to the target set water temperature value can be set according to actual application requirements, which is not specifically limited in specific applications.

[0087] By the above method, whether the hot water heating function of the ATW heat pump is in a running state or a standby state, as long as the user has a space heating demand, the inverter controls the ATW heat pump to restore the current set water temperature value to the target set water temperature value (if the hot water heating function is turned on, the hot water heating function is turned off) and runs the space heating function, ensuring that the ATW heat pump can adjust the running state at any time according to the user's demand, so that the ATW heat pump can immediately meet the user's space heating demand, and improve the user experience.

[0088] In some embodiments, the control of the heat pump to run the hot water heating function comprises:

[0089] obtaining the running state of the hot water heating function of the heat pump;

[0090] determining that the hot water heating function of the heat pump is in a standby state, and then turning on the hot water heating function of the heat pump;

[0091] determining that the hot water heating function of the heat pump is in a running state, and then consuming the photovoltaic excess electricity through the hot water heating function.

[0092] Specifically, when it is determined according to the first information that the user does not have a space heating demand, the current running state of the hot water heating function of the ATW heat pump is determined, if the hot water heating function of the ATW heat pump is in a standby state, the hot water heating function is turned on, and the photovoltaic excess electricity is consumed through the hot water heating function; if the hot water heating function of the ATW heat pump is already in a running state, the hot water heating function continues to run to consume the photovoltaic excess electricity, and stops running the hot water heating function when the photovoltaic excess electricity is consumed.

[0093] By the above method, when the user does not have a space heating demand, the ATW heat pump is controlled to continuously run the hot water heating function to consume and store the photovoltaic excess electricity, which can improve the efficiency of the ATW heat pump for photovoltaic consumption and reduce the energy loss caused by the multiple start-stop of the hot water heating function of the ATW heat pump.

[0094] In some embodiments, the determination that the hot water heating function of the heat pump is in a standby state, and then the turning on of the hot water heating function of the heat pump comprises:

[0095] determining that the heat pump does not satisfy the first condition, and then restoring the current set water temperature of the hot water tank in the heat pump to a target set water temperature; and / or,

[0096] determining that the electric heating function of the hot water tank in the heat pump has been turned on, and then turning off the electric heating function;

[0097] determining that the heat pump satisfies the first condition and the compressor of the heat pump cannot be turned on, and then setting the current set water temperature value of the hot water tank in the heat pump to an upper limit water temperature value, and turning on the electric heating function;

[0098] determining that the heat pump meets a first condition and that a compressor of the heat pump can be turned on, setting the current set water temperature value of a hot water tank in the heat pump to an upper limit water temperature value;

[0099] The first condition includes:

[0100] The remaining capacity of the energy storage unit is greater than or equal to an opening capacity threshold; and

[0101] The grid-connected power of the photovoltaic residual power is greater than or equal to a first power threshold.

[0102] Specifically, when the hot water heating function of the ATW heat pump is in a standby state, it is determined whether the ATW heat pump meets the first condition. If the ATW heat pump does not meet the first condition, the hot water heating function cannot be run. If the ATW heat pump meets the first condition, it is further determined whether the compressor of the ATW heat pump can be turned on. If the compressor can be turned on, the hot water heating function is run through the compressor heating function. If the compressor cannot be turned on, the hot water heating function is run through the electric heating function.

[0103] Here, the ATW heat pump is connected to an energy storage unit (such as a battery), and the power consumed by the ATW heat pump when running the hot water heating function or the space heating function can be generated by a photovoltaic component (such as a solar panel) and stored in the energy storage unit. The photovoltaic component is specifically used to convert solar energy into electrical energy, and store the generated electrical energy (i.e., photovoltaic residual power) in the energy storage unit for use by the ATW heat pump and / or grid connection (i.e., upload to the power grid).

[0104] The remaining capacity of the energy storage unit can refer to the amount of photovoltaic residual power remaining in the energy storage unit after the photovoltaic residual power is grid-connected. When the remaining capacity of the energy storage unit is greater than or equal to the opening capacity threshold, it indicates that the current amount of power in the energy storage unit is sufficient. When the photovoltaic residual power cannot be grid-connected, the remaining capacity of the energy storage unit can be used entirely for use by the ATW heat pump.

[0105] The grid-connected power can refer to the amount of photovoltaic residual power that can be grid-connected. When the grid-connected power of the photovoltaic residual power is greater than or equal to the first power threshold, it indicates that the amount of photovoltaic residual power that can be grid-connected is sufficient.

[0106] The remaining capacity of the energy storage unit of the ATW heat pump is greater than or equal to the opening capacity threshold and the grid-connected power of the photovoltaic residual power is greater than or equal to the first power threshold, i.e., the first condition is met, indicating that the amount of power in the current energy storage unit is sufficient and the amount of photovoltaic residual power that can be grid-connected is sufficient. At this time, the photovoltaic residual power can be used to store hot water for free (i.e., run the hot water heating function).

[0107] In a possible implementation, when the ATW heat pump does not satisfy the first condition, which indicates that the photovoltaic surplus electricity in the current energy storage unit is insufficient or the grid-connected power is insufficient, and the ATW heat pump cannot consume the photovoltaic surplus electricity by running the hot water heating function, it is determined whether the current set water temperature value of the hot water tank in the ATW heat pump is the upper limit water temperature value. If the current set water temperature value is the upper limit water temperature value, the current set water temperature value is restored to the target set water temperature value. If the ATW heat pump starts the electric heating function, the electric heating function is turned off.

[0108] In a possible implementation, when the ATW heat pump satisfies the first condition, which indicates that the photovoltaic surplus electricity in the current energy storage unit is sufficient and the grid-connected power is sufficient, and the ATW heat pump can consume the photovoltaic surplus electricity by running the hot water heating function, it is further determined whether the compressor in the photovoltaic consumption system can be started. If the compressor can be started, the hot water heating function is run by starting the compressor heating function, that is, the current set water temperature value of the hot water tank in the heat pump is set to the upper limit water temperature value. If the compressor cannot be started, the hot water heating function is run by starting the electric heating function, that is, the current set water temperature value of the hot water tank in the heat pump is set to the upper limit water temperature value and the electric heating function is started.

[0109] In a possible implementation, the ATW heat pump sets the current set water temperature value to the upper limit water temperature value, and runs the hot water heating function by the electric heating function or the compressor heating function. During the running of the hot water heating function, the hot water heating function may be stopped due to that the ATW heat pump does not satisfy the first condition (that is, the photovoltaic surplus electricity is insufficient), and at this time, the water temperature in the ATW heat pump is not equal to the upper limit water temperature value. The hot water heating function may also be continuously run due to that the ATW heat pump continuously satisfies the first condition (that is, the photovoltaic surplus electricity is sufficient), and at this time, the water temperature in the ATW heat pump is equal to the upper limit water temperature value.

[0110] By the above method, it is determined whether the compressor can be started. In the case that the compressor can be started, the hot water heating function is run only by the compressor heating function which has relatively higher energy efficiency, so that the photovoltaic surplus electricity can be consumed while the heat storage by the hot water heating is performed, and the user's income from the grid-connected photovoltaic surplus electricity is improved.

[0111] In some embodiments, the determining that the hot water heating function of the heat pump is in a running state, and consuming the photovoltaic surplus electricity by the hot water heating function, includes:

[0112] The determining that the heat pump satisfies the first condition, and setting the current set water temperature value of the hot water tank in the heat pump to the upper limit water temperature value, and consuming the photovoltaic surplus electricity by the hot water heating function.

[0113] determining that the heat pump does not satisfy the first condition, satisfies the second condition, and the current set water temperature value of the hot water tank is an upper limit water temperature value, restoring the current set water temperature value of the hot water tank to a target set water temperature; and / or,

[0114] determining that the hot water tank in the heat pump has started an electric heating function, and closing the electric heating function;

[0115] The first condition includes:

[0116] The remaining capacity of the energy storage unit is greater than or equal to a start capacity threshold; and,

[0117] The grid-connected power of the photovoltaic surplus electricity is greater than or equal to a first power threshold;

[0118] The second condition includes at least one of:

[0119] The remaining capacity of the energy storage unit is less than an end capacity threshold;

[0120] The power of the photovoltaic surplus electricity is greater than or equal to a second power threshold.

[0121] Specifically, when the ATW heat pump is in a running state, it is determined whether the ATW heat pump satisfies the first condition. If the first condition is satisfied, the current set water temperature value of the hot water tank in the heat pump is set to an upper limit water temperature value. If the ATW heat pump does not satisfy the first condition and does not satisfy the second condition, it is normally run. If the ATW heat pump does not satisfy the first condition and satisfies the second condition, the hot water function is closed.

[0122] Here, the second condition refers to the remaining capacity of the energy storage unit being less than an end capacity threshold or the power of the photovoltaic surplus electricity being greater than or equal to a second power threshold. The remaining capacity being less than the end capacity threshold can represent that the photovoltaic surplus electricity capacity in the energy storage unit is insufficient to continue running the hot water function to consume the photovoltaic surplus electricity. The power of the photovoltaic consumption system can be the power of the photovoltaic consumption system from the power grid. The power of the photovoltaic consumption system being greater than or equal to the second power threshold represents that the current grid-connected photovoltaic surplus electricity capacity is insufficient, and the photovoltaic consumption system starts to take power from the power grid.

[0123] In one possible implementation, the ATW heat pump satisfies the first condition, which can represent that the photovoltaic surplus electricity in the current photovoltaic consumption system energy storage unit is sufficient, and can support the ATW heat pump to run the hot water function through the electric heating function or the compressor heating function to consume the photovoltaic surplus electricity.

[0124] In a possible implementation, when the ATW heat pump meets the first condition and does not meet the second condition, it can be represented that the photovoltaic surplus electricity in the energy storage unit of the current photovoltaic consumption system is still sufficient, and the photovoltaic surplus electricity can support the ATW heat pump to continue to run the hot water function through the electric heating function or the compressor heating function.

[0125] In a possible implementation, when the ATW heat pump meets the first condition and meets the second condition, it can be represented that the photovoltaic surplus electricity is consumed by the ATW heat pump by running the hot water function, so that the capacity of the photovoltaic surplus electricity in the energy storage unit is insufficient to continue to support the ATW heat pump to run the hot water function, and power needs to be taken from the power grid if the ATW heat pump continues to run; if the ATW heat pump does not meet the first condition and meets the second condition, the current set water temperature value of the hot water tank is restored to the target set water temperature, and it is determined that the electric heating function of the hot water tank in the heat pump is turned on, and then the electric heating function is turned off.

[0126] The method provided by the embodiment of the application can use the photovoltaic surplus electricity to run the hot water function or the space heating function of the ATW heat pump when the photovoltaic surplus electricity can be connected to the network and the remaining capacity of the battery is greater than a certain threshold, so that the free electricity is fully utilized; when the user has a space heating demand, the running state is immediately adjusted to switch from the hot water function to the space heating function, so that the comfort of the user is ensured and the user experience is improved; in addition, the hot water function is run only by using the compressor heating function when the photovoltaic surplus electricity reaches a certain threshold and the compressor can be turned on, so that the heat storage water and the income of the photovoltaic surplus electricity connected to the network can be increased at the same time.

[0127] Figure 2 A flowchart of a heat pump control method based on photovoltaic consumption provided by an application embodiment of the application is shown in FIG. 1. Figure 2 As shown in FIG. 1, the method comprises the following steps.

[0128] In step 201, it is determined that the ATW heat pump is in a space heating running state, and step 205 is entered.

[0129] In step 202, it is determined that the ATW heat pump is in a space heating standby state and has a space heating demand, and step 205 is entered.

[0130] In step 203, it is determined that the ATW heat pump is in a hot water standby state and has no space heating demand, and step 206 is entered.

[0131] In step 204, it is determined that the ATW heat pump is in a hot water running state and has a space heating demand, and step 210 is entered.

[0132] In step 205, if the strategy has adjusted the hot water running state, the hot water state is restored.

[0133] Here, the inverter can determine whether Ts of the ATW heat pump (equivalent to the current set water temperature value) is equal to Ts max (equivalent to the upper limit water temperature value), and if Ts = Ts max (equivalent to the current set water temperature value being the upper limit water temperature value), Ts is restored to Ts 0 (equivalent to the target set water temperature value), and if the electric heating function is turned on, the electric heating function is turned off.

[0134] Step 206, determine whether the ATW heat pump satisfies the first condition of SOC of the energy storage unit ≥ SOC on and the grid-connected power ≥ Pto grid. If yes, go to step 207, if not, go to step 205.

[0135] Step 207, determine whether the compressor of the ATW heat pump can be turned on. If yes, go to step 208, if not, go to step 209.

[0136] Step 208, Ts = Ts max.

[0137] Specifically, the ATW heat pump sets the current set water temperature value to the upper limit water temperature value, and can use the compressor heating function to heat (equivalent to running the hot water heating function).

[0138] Step 209, Ts = Ts max and turn on the electric heating.

[0139] Specifically, the ATW heat pump can set the current set water temperature value to the upper limit water temperature value, and use the electric heating function to heat (equivalent to running the hot water heating function).

[0140] Step 210, determine whether the ATW heat pump satisfies the first condition of SOC of the energy storage unit ≥ SOC on and the grid-connected power ≥ Pto grid. If yes, go to step 211, if not, go to step 212.

[0141] Step 211, Ts = Ts max.

[0142] Specifically, the ATW heat pump can set the current set water temperature value to the upper limit water temperature value, and turn on the compressor heating function or the electric heating function to heat.

[0143] Step 212, determine whether the ATW heat pump satisfies the second condition of SOC of the energy storage unit < SOC off and / or the power taken from the grid ≥ Pfrom grid. If yes, go to step 213, if not, go to step 214.

[0144] Step 213, if the strategy has adjusted the hot water heating running state, restore the hot water heating state.

[0145] Specifically, if Ts = Ts_max, then let Ts = Ts_0; if the electric heating function is enabled, then disable the electric heating function.

[0146] Step 214: Run as usual.

[0147] Specifically, if the ATW heat pump sets Ts = Ts_max and turns on the electric heating function or the compressor heating function, then the operation remains unchanged; if the ATW heat pump does not perform any operation, then no operation will be performed either.

[0148] Figure 3 This is a schematic diagram of a photovoltaic power absorption system provided in an embodiment of the present invention; as shown below. Figure 3 As shown, the system includes: photovoltaic modules 301, energy storage unit 302, inverter 303, distribution cabinet 304, air-to-water ATW heat pump 305, power sensor 306, and power grid 307; wherein,

[0149] The photovoltaic module 301 (such as a solar panel) is used to convert solar energy into electrical energy and send it to an energy storage unit (such as a battery) for storage.

[0150] The energy storage unit 302 is used to store the electrical energy generated by the photovoltaic module;

[0151] The inverter 303 is used to perform Figure 1 The method shown;

[0152] The power distribution cabinet 304 is used to protect the photovoltaic power absorption system from short circuits and to control the fault range when the photovoltaic power absorption system fails.

[0153] The air-water ATW heat pump 305 can be used as follows: Figure 4 An ATW heat pump device is shown;

[0154] The power sensor 306 is used to determine the grid-connected power when the inverter 303 controls the photovoltaic absorption system to upload surplus photovoltaic power to the grid 307, and to determine the power taken by the photovoltaic absorption system from the grid 307.

[0155] Grid 307 is used to receive surplus photovoltaic power uploaded by the photovoltaic consumption system.

[0156] Figure 4 This is a schematic diagram of the structure of an ATW heat pump provided in an embodiment of the present invention; as shown. Figure 4 As shown, the ATW heat pump includes: an integrated ATW heat pump outdoor unit 401, a wired controller 402, a domestic hot water tank 403, a water tank electric heating assembly 404, and an electric three-way valve 405; wherein,

[0157] The integral ATW heat pump outdoor unit 401 is used for gas circulation of the ATW heat pump, that is, absorbing air at normal temperature and low pressure and discharging gas at low temperature and high pressure, and can heat water when the current set water temperature value of the domestic hot water tank 403 is the upper limit water temperature value by running the compressor heating function of the built-in compressor;

[0158] The line controller 402 is used for sensing and adjusting temperature, can receive external instructions, determine whether there is a space heating demand according to the external instructions, send first information to the inverter 303, and the inverter 303 controls the ATW heat pump to switch between the water heating function and the space heating function according to the first information;

[0159] The domestic hot water tank 403 is used for water storage and heat preservation, and when the current set water temperature value is the upper limit water temperature value, the electric heating function of the built-in water tank electric heating assembly 404 is run to heat water;

[0160] The water tank electric heating assembly 404 is used for heating the water stored in the domestic hot water tank 403 by the electric heating function;

[0161] The electric three-way valve 405 is used for controlling the ATW heat pump to switch between the water heating function and the space heating function by the inverter 303.

[0162] As shown in the example, Figure 4 The ATW heat pump can further include a balance tank 406, which is used to increase the water storage capacity of the ATW heat pump, avoid frequent start and stop of the ATW heat pump during operation, and play a buffering protection role for the ATW heat pump.

[0163] As shown in the example, Figure 4 The ATW heat pump can further include an expansion tank 407, which is used for pressure stabilization and unloading, reduces the influence of water thermal expansion and contraction in the ATW heat pump, ensures stable water pressure, and avoids frequent start and stop of the ATW heat pump due to unstable water pressure.

[0164] As shown in the example, Figure 4 The ATW heat pump can further include a floor heating 408, which is used to run the space heating function and meet the space heating demand of the user.

[0165] Figure 5 The structure diagram of the control device of the photovoltaic consumption system provided by the embodiment of the application is shown in the example, Figure 5 The device can be applied to servers, computers and other intelligent electronic devices; the control device 50 of the photovoltaic consumption system includes an acquisition module 501, a first control module 502 and a second control module 503;

[0166] The acquisition module 501 is configured to acquire first information, wherein the first information is used to indicate whether there is a space heating demand.

[0167] The first control module 502 is configured to determine, based on the first information, that there is the space heating demand, and control the heat pump to switch from operating a hot water heating function to operating a space heating function.

[0168] The second control module 503 is configured to determine, based on the first information, that there is no space heating demand, and control the heat pump to operate the hot water heating function.

[0169] Specifically, the first control module 502 is configured to determine that a current set water temperature value of a hot water tank in the heat pump is an upper limit water temperature value, and then restore the current set water temperature value of the hot water tank to a target set water temperature value; and / or,

[0170] determine that the hot water tank in the heat pump has started an electric heating function, and then turn off the electric heating function.

[0171] Specifically, the second control module 503 is configured to acquire an operating state of the hot water heating function of the heat pump.

[0172] determine that the hot water heating function of the heat pump is in a standby state, and then start the hot water heating function of the heat pump;

[0173] determine that the hot water heating function of the heat pump is in an operating state, and then absorb the photovoltaic excess electricity through the hot water heating function.

[0174] Specifically, the second control module 503 is configured to determine that the heat pump does not meet a first condition, and then restore a current set water temperature of a hot water tank in the heat pump to a target set water temperature; and / or,

[0175] determine that the hot water tank in the heat pump has started an electric heating function, and then turn off the electric heating function.

[0176] determine that the heat pump meets the first condition and a compressor of the heat pump cannot be started, and then set the current set water temperature value of the hot water tank in the heat pump to an upper limit water temperature value, and start the electric heating function.

[0177] determine that the heat pump meets the first condition and the compressor of the heat pump can be started, and then set the current set water temperature value of the hot water tank in the heat pump to an upper limit water temperature value.

[0178] The first condition includes:

[0179] a remaining capacity of the energy storage unit is greater than or equal to a starting capacity threshold; and

[0180] The grid-connected power of the photovoltaic residual power is greater than or equal to a first power threshold.

[0181] Specifically, the second control module 503 is configured to: determine that the heat pump satisfies a first condition, set a current set water temperature value of a hot water tank in the heat pump as an upper limit water temperature value, and consume the photovoltaic residual power through the hot water heating function.

[0182] determine that the heat pump does not satisfy the first condition, satisfies a second condition, and the current set water temperature value of the hot water tank is the upper limit water temperature value, restore the current set water temperature value of the hot water tank to a target set water temperature value; and / or,

[0183] determine that the hot water tank in the heat pump has started an electric heating function, and turn off the electric heating function.

[0184] The first condition includes:

[0185] the remaining capacity of the energy storage unit is greater than or equal to an opening capacity threshold; and

[0186] the grid-connected power of the photovoltaic residual power is greater than or equal to a first power threshold.

[0187] The second condition includes at least one of:

[0188] the remaining capacity of the energy storage unit is less than an ending capacity threshold;

[0189] the grid-connected power of the photovoltaic residual power is greater than or equal to a second power threshold.

[0190] It should be noted that the control device of the photovoltaic consumption system provided in the above embodiments is only used as an example to illustrate the division of the above program modules when implementing the corresponding heat pump control method based on photovoltaic consumption. In actual applications, the above processes can be completed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules to complete all or part of the above processes. In addition, the device provided in the above embodiments and the corresponding Figure 1 The embodiments of the method provided in the above embodiments belong to the same concept, and the specific implementation process is described in detail in the method embodiments, which will not be repeated here.

[0191] To implement the method of the embodiments of the present application, the embodiments of the present application further provide a heat pump control device based on photovoltaic consumption, as shown in Figure 6As shown, the apparatus 60 comprises: a processor 601 and a memory 602 for storing computer programs capable of running on the processor; the processor 601 is configured to run the computer programs to perform: obtaining first information, the first information being used to indicate whether there is a space heating demand; determining that there is the space heating demand based on the first information, and controlling the heat pump to switch from running a hot water heating function to running a space heating function; determining that there is no space heating demand based on the first information, and controlling the heat pump to run the hot water heating function. Specifically, the apparatus can also perform the steps as shown in Figure 1 The method shown is the same as the method embodiment shown in Figure 1 The method embodiment shown belongs to the same concept, and the specific implementation process is described in the method embodiment, which will not be repeated here.

[0192] In actual application, the apparatus 60 can further comprise: at least one network interface 603. The various components in the apparatus 60 are coupled together through a bus system 604. It can be understood that the bus system 604 is used to realize the connection and communication between the components. The bus system 604 includes not only a data bus, but also a power supply bus, a control bus and a status signal bus. However, for the purpose of clear illustration, all kinds of buses are marked as the bus system 604 in Figure 6 . The number of the processor 601 can be at least one. The network interface 603 is used for wired or wireless communication between the apparatus 60 and other devices.

[0193] The memory 602 in the embodiment of the application is used to store various types of data to support the operation of the apparatus 60.

[0194] The method disclosed in the above embodiment of the application can be applied to the processor 601 or implemented by the processor 601. The processor 601 can be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed by the integrated logic circuit of hardware in the processor 601 or the instructions in the form of software. The processor 601 described above can be a general-purpose processor, a digital signal processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The processor 601 can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the application. The general-purpose processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiments of the application, the above-mentioned method can be directly embodied as a hardware coding processor for execution, or a combination of hardware and software modules in the coding processor for execution. The software module can be located in a storage medium, and the storage medium is located in the memory 602. The processor 601 reads the information in the memory 602 and combines the hardware to complete the steps of the above-mentioned method.

[0195] In exemplary embodiments, the apparatus 60 can be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field-Programmable Gate Arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors (Microprocessors), or other electronic elements for executing the aforementioned methods.

[0196] The embodiment of the present application further provides a computer readable storage medium, which stores a computer program; when the computer program is executed by a processor, the following is executed: obtaining first information, the first information being used for indicating whether there is a space heating demand; determining that there is the space heating demand based on the first information, and controlling the heat pump to switch from operating a heating water function to operating a space heating function; determining that there is no space heating demand based on the first information, and controlling the heat pump to operate the heating water function. Specifically, the computer program can further execute the method shown in the method embodiment, and the method embodiment shown in the method embodiment belongs to the same concept, and the specific implementation process is described in the method embodiment, which is not described herein again. Figure 1 The method embodiment shown in the method embodiment belongs to the same concept, and the specific implementation process is described in the method embodiment, which is not described herein again. Figure 1 The method embodiment shown in the method embodiment belongs to the same concept, and the specific implementation process is described in the method embodiment, which is not described herein again.

[0197] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented by other manners. The apparatus embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed components can be through some interfaces, indirect coupling or communication connection between the devices or units can be electrical, mechanical or other forms.

[0198] The units described above as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place or distributed on a plurality of network units; part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0199] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be a single unit, or two or more units can be integrated in one unit; the integrated unit can be realized in the form of hardware or in the form of hardware plus software function unit.

[0200] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware, and the foregoing program can be stored in a computer readable storage medium, and the program executes the steps of the above-mentioned method embodiments when executed; and the foregoing storage medium includes mobile storage equipment, read-only memory (ROM), random access memory (RAM), magnetic disc or optical disc and various storage program codes.

[0201] Alternatively, the integrated unit of the present application can be stored in a computer readable storage medium if it is realized in the form of a software function module and sold or used as an independent product. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be an inverter) to execute all or part of the methods described in the embodiments of the present application. The foregoing storage medium includes mobile storage equipment, ROM, RAM, magnetic disc or optical disc and various storage program codes.

[0202] It should be noted that "first", "second" and the like are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0203] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0204] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for controlling a heat pump based on photovoltaic accommodation, characterized in that, The application is applied to a photovoltaic consumption system, and the photovoltaic consumption system comprises a photovoltaic assembly, an energy storage unit, a heat pump and an inverter, the photovoltaic assembly generates photovoltaic residual power and stores the photovoltaic residual power in the energy storage unit, and the inverter controls the heat pump to consume the photovoltaic residual power; the method comprises the following steps: Obtaining first information, the first information is used to indicate whether there is a space heating demand; Based on the first information, it is determined that the space heating demand is met, and the heat pump is controlled to switch from operating a hot water heating function to operating a space heating function; Based on the first information, it is determined that the space heating demand is not met, and the heat pump is controlled to operate the hot water heating function; The control of the heat pump from operating the hot water heating function to operating the space heating function comprises: If it is determined that the current set water temperature value of the hot water tank in the heat pump is an upper limit water temperature value, the current set water temperature value of the hot water tank is restored to a target set water temperature value; and / or, If it is determined that the hot water tank in the heat pump has started an electric heating function, the electric heating function is turned off.

2. The method of claim 1, wherein, The control of the heat pump operating the hot water heating function comprises: Obtaining the operating state of the hot water heating function of the heat pump; If it is determined that the hot water heating function of the heat pump is in a standby state, the hot water heating function of the heat pump is started; If it is determined that the hot water heating function of the heat pump is in an operating state, the photovoltaic residual power is consumed through the hot water heating function.

3. The method of claim 2, wherein, The determination that the hot water heating function of the heat pump is in a standby state, and the starting of the hot water heating function of the heat pump, comprises: If it is determined that the heat pump does not meet a first condition, the current set water temperature of the hot water tank in the heat pump is restored to a target set water temperature; and / or, If it is determined that the hot water tank in the heat pump has started an electric heating function, the electric heating function is turned off; If it is determined that the heat pump meets the first condition and the compressor of the heat pump cannot be started, the current set water temperature value of the hot water tank in the heat pump is set to an upper limit water temperature value, and the electric heating function is started; If it is determined that the heat pump meets the first condition and the compressor of the heat pump can be started, the current set water temperature value of the hot water tank in the heat pump is set to an upper limit water temperature value; The first condition comprises: The remaining capacity of the energy storage unit is greater than or equal to a starting capacity threshold; and The grid-connected power of the photovoltaic residual power is greater than or equal to a first power threshold.

4. The method of claim 2, wherein, The determination that the hot water heating function of the heat pump is in an operating state, and the consumption of the photovoltaic residual power through the hot water heating function, comprises: If it is determined that the heat pump meets the first condition, the current set water temperature value of the hot water tank in the heat pump is set to an upper limit water temperature value, and the photovoltaic residual power is consumed through the hot water heating function; If it is determined that the heat pump does not meet the first condition, meets a second condition and the current set water temperature value of the hot water tank is an upper limit water temperature value, the current set water temperature value of the hot water tank is restored to a target set water temperature; and / or, If it is determined that the hot water tank in the heat pump has started an electric heating function, the electric heating function is turned off; The first condition comprises: The remaining capacity of the energy storage unit is greater than or equal to a starting capacity threshold; and The grid-connected power of the photovoltaic residual power is greater than or equal to a first power threshold. The grid-connected power of the photovoltaic residual power is greater than or equal to a first power threshold value; The second condition comprises at least one of the following: The remaining capacity of the energy storage unit is less than an ending capacity threshold value; The power of the photovoltaic residual power is greater than or equal to a second power threshold value.

5. A photovoltaic accommodation system, characterized in that, Comprise: A photovoltaic assembly for generating photovoltaic residual power and storing in an energy storage unit; An energy storage unit for storing the photovoltaic residual power generated by the photovoltaic assembly; A heat pump for operating a hot water heating function or a space heating function; An inverter for controlling the heat pump to consume the photovoltaic residual power generated by the photovoltaic assembly in the energy storage unit, and executing the method of any one of claims 1 to 4.

6. The PV hosting system of claim 5, wherein, The heat pump further comprises a wire controller, which receives an external instruction, determines whether there is a space heating demand according to the external instruction, and sends first information to the inverter.

7. The PV hosting system of claim 5, wherein, The heat pump comprises a hot water tank and a water tank electric heating assembly located in the hot water tank, and the inverter controls the heat pump to start the hot water heating function by setting the current set water temperature value of the hot water tank to an upper limit water temperature value, and / or starting the water tank electric heating assembly. The inverter controls the heat pump to stop the hot water heating function by restoring the upper limit water temperature value of the hot water tank to a target set water temperature value, and / or stopping the water tank electric heating assembly.

8. The PV hosting system of claim 5, wherein, The heat pump further comprises a heat pump outdoor unit, and a compressor is located in the heat pump outdoor unit, and the inverter controls the heat pump to start the hot water heating function by setting the current set water temperature value of the hot water tank to an upper limit water temperature value, and / or starting the compressor.

9. The PV hosting system of claim 5, wherein, The heat pump further comprises an electric three-way valve, and the inverter controls the heat pump to switch between the hot water heating function and the space heating function through the electric three-way valve.

10. A control device of a photovoltaic accommodation system according to any one of claims 5 to 9, characterized in that, The device comprises an acquisition module, a first control module and a second control module; wherein, The acquisition module is configured to acquire first information, the first information being used to indicate whether there is a space heating demand; The first control module is configured to determine that there is the space heating demand based on the first information, and control the heat pump to switch from operating a hot water heating function to operating a space heating function; The second control module is configured to determine that there is no space heating demand based on the first information, and control the heat pump to operate the hot water heating function; The first control module is specifically configured to determine that the current set water temperature value of a hot water tank in the heat pump is an upper limit water temperature value, and then restore the current set water temperature value of the hot water tank to a target set water temperature value; and / or Determine that the electric heating function of the hot water tank in the heat pump has been started, and then stop the electric heating function.

11. A photovoltaic accommodation based heat pump control device, characterized by, The device comprises a network interface, a memory and a processor; wherein the network interface is configured to realize the connection and communication between components; the memory is configured to store a computer program capable of running on the processor; and the processor is configured to execute the method of any one of claims 1 to 4 when running the computer program.

12. A computer storage medium, characterized in that The computer storage medium stores a computer program which, when executed by at least one processor, implements the method according to any one of claims 1 to 4.

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