Photovoltaic residual power-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 residual power 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, and consuming the photovoltaic residual power which cannot be uploaded to a power grid through the hot water heating function. In this way, the photovoltaic residual power which cannot be uploaded to the power grid is consumed by controlling the heat pump to operate the hot water heating function, and waste of photovoltaic resources is avoided; when a user has a space heating demand, the heat pump for photovoltaic consumption switches 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 residual electricity. 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, a heat pump operation control method based on photovoltaic consumption usually sets the water temperature of a domestic hot water tank to an upper limit value (such as 70℃) when the photovoltaic surplus power reaches a certain threshold value, and simultaneously turns on the electric heating function in the water tank, so as to consume the photovoltaic electricity in the form of hot water energy storage. The part of the photovoltaic residual electricity that cannot be consumed by the heat pump can be uploaded to the power grid, thereby bringing additional benefits to the user.

[0004] The above control method still has disadvantages. For example, when the photovoltaic residual electricity consumption capacity of the heat pump is saturated and the excess photovoltaic residual electricity cannot be uploaded to the power grid, there is no consumption strategy for the photovoltaic residual electricity that cannot be uploaded to the power grid, so this part of the photovoltaic residual electricity has to be abandoned, thereby reducing the utilization rate of photovoltaic resources and causing waste of resources. 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 residual electricity.

[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 residual electricity, applied to a photovoltaic consumption system, wherein the photovoltaic consumption system comprises a photovoltaic assembly, an energy storage unit, a heat pump and an inverter. The photovoltaic assembly generates photovoltaic residual electricity and stores the photovoltaic residual electricity in the energy storage unit. When the inverter determines that the photovoltaic residual electricity cannot be uploaded to the power grid, the inverter controls the heat pump to consume the photovoltaic residual electricity that cannot be uploaded to the power grid. The method comprises the following steps:

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

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

[0010] Based on the first information, it is determined that there is no space heating demand, and the heat pump is controlled to run the hot water function, and the photovoltaic residual electricity that cannot be uploaded to the power grid is consumed through the hot water function.

[0011] In the above solution, the control of the heat pump switching 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, 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, then closing the electric heating function.

[0014] In the above solution, the control of the heat pump operating the hot water heating function comprises:

[0015] obtaining the 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, 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, then absorbing the photovoltaic excess electricity that cannot be uploaded to the power grid through the hot water heating function.

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

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

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

[0021] determining that the heat pump meets the first condition and the compressor of the heat pump cannot be started, 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, 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] wherein the first condition comprises:

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

[0025] the photovoltaic excess electricity cannot be uploaded to the power grid.

[0026] In the scheme, when the hot water heating function of the heat pump is determined to be in the running state, the photovoltaic excess electricity that cannot be uploaded to the power grid is consumed through the hot water heating function, including at least one of the following:

[0027] When the heat pump is determined to satisfy 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 that cannot be uploaded to the power grid is consumed through the hot water heating function.

[0028] When the heat pump is determined not to satisfy the first condition, the hot water heating function is run by using a compressor heating function and satisfies a second condition, the current set water temperature value of the hot water tank in the heat pump is restored to a target set water temperature value, the running state of the heat pump after a first preset time period is determined, and / or whether the space heating demand exists.

[0029] When the heat pump is determined not to satisfy the first condition, the hot water heating function is run by using an electric heating function and satisfies a third condition, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, the electric heating function is closed, the running state of the heat pump after the first preset time period is determined, and / or whether the space heating demand exists.

[0030] The first condition includes:

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

[0032] The photovoltaic excess electricity cannot be uploaded to the power grid.

[0033] The second condition includes:

[0034] The compressor has run for a second preset time period; and

[0035] The remaining capacity of the energy storage unit is less than an end capacity threshold value, and / or the power of the photovoltaic excess electricity is greater than or equal to a second power threshold value.

[0036] The third condition includes:

[0037] The remaining capacity of the energy storage unit is less than the end capacity threshold value, and / or the power of the photovoltaic excess electricity is greater than or equal to the second power threshold value.

[0038] In a second aspect, an embodiment of the present application provides a photovoltaic consumption system, which includes:

[0039] A photovoltaic assembly for generating photovoltaic excess electricity and storing in an energy storage unit;

[0040] a storage unit configured to store photovoltaic (PV) surplus power generated by the PV module; and a heat pump configured to operate a hot water heating function or a space heating function;

[0041] an inverter configured to determine that the PV surplus power cannot be uploaded to a power grid, control the heat pump to absorb the PV surplus power generated by the PV module in the storage unit and unable to be uploaded to the power grid, and perform steps of the method of the first aspect of the present application.

[0042] In the above solution, the heat pump further comprises a wire control device configured to receive an external instruction, determine whether there is a space heating demand according to the external instruction, and send first information to the inverter.

[0043] In the above solution, 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 a 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, and absorbs the PV surplus power unable to be uploaded to the power grid by operating the hot water heating function by using an electric heating function.

[0044] 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.

[0045] In the above solution, 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 a current set water temperature value of the hot water tank as an upper limit water temperature value and / or starting the compressor, and absorbs the PV surplus power unable to be uploaded to the power grid by operating the hot water heating function by using a compressor heating function.

[0046] In the above solution, 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.

[0047] 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;

[0048] 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 the hot water heating function to operating the space heating function.

[0049] The second control module is configured to determine, based on the first information, that there is no space heating demand, control the heat pump to operate the hot water heating function, and consume the photovoltaic residual power that cannot be uploaded to the power grid through the hot water heating function.

[0050] In a fourth aspect, an embodiment of the present application further provides a heat pump control device based on photovoltaic consumption, comprising a network interface, a memory and a processor; wherein the network interface is configured to realize connection and communication among components; the memory is configured to store a computer program capable of running on the processor; and the processor is configured to execute steps of the method in the first aspect of the present application when running the computer program.

[0051] In a fifth aspect, an embodiment of the present application provides a storage medium, and the storage medium stores a computer program. When the computer program is executed by a processor, steps of the method in the first aspect of the present application are realized.

[0052] The technical scheme provided by the embodiment of the present application is a heat pump control method based on photovoltaic residual power, applied to a photovoltaic consumption system. The photovoltaic consumption system comprises a photovoltaic component, an energy storage unit, a heat pump and an inverter. The photovoltaic component generates photovoltaic residual power and stores the photovoltaic residual power in the energy storage unit. When the inverter determines that the photovoltaic residual power cannot be uploaded to the power grid, the inverter controls the heat pump to consume the photovoltaic residual power that cannot be uploaded to the power grid. The method comprises the following steps: obtaining first information, wherein the first information is used to indicate whether there is a space heating demand; determining, based on the first information, that there is the space heating demand, and controlling the heat pump to switch from operating a hot water heating function to operating a space heating function; determining, based on the first information, that there is no space heating demand, and controlling the heat pump to operate the hot water heating function, and consuming the photovoltaic residual power that cannot be uploaded to the power grid through the hot water heating function. In this way, firstly, the photovoltaic residual power that cannot be uploaded to the power grid is consumed by controlling the heat pump to operate the hot water heating function, thereby avoiding waste of photovoltaic resources and improving utilization of photovoltaic resources. Secondly, when a user has a space heating demand, the heat pump operating the hot water heating function is switched to operating the space heating function, thereby meeting the space heating demand of the user, improving user comfort during photovoltaic consumption, and improving user experience. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 A flowchart of a heat pump control method based on photovoltaic residual power is provided for the embodiment of the present application;

[0054] Figure 2 A flowchart of a heat pump control method based on photovoltaic residual power is provided for the embodiment of the present application;

[0055] Figure 3 A structure diagram of a photovoltaic consumption system is provided for the embodiment of the present application;

[0056] Figure 4 A structural schematic diagram of an ATW heat pump provided for an embodiment of the present application;

[0057] Figure 5 A structural schematic diagram of a control device of a photovoltaic consumption system provided for an embodiment of the present application;

[0058] Figure 6 A structural schematic diagram of a heat pump control device based on photovoltaic consumption provided for an embodiment of the present application.

[0059] BRIEF DESCRIPTION OF DRAWINGS

[0060] 301, photovoltaic module; 302, energy storage unit; 303, inverter; 304, power distribution cabinet; 305, air-water ATW heat pump; 306, power sensor; 307, power grid;

[0061] 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

[0062] In the related art, a heat pump control method based on photovoltaic surplus power is provided. In the method, when it is determined that the photovoltaic surplus power reaches a certain threshold value, the electric heating function or the compressor heating function is started to run the hot water function, so as to raise the set water temperature in the hot water tank to an upper limit value (such as 70℃), and the energy is preferentially stored through the hot water function to consume the photovoltaic surplus power, so as to realize free electricity for hot water. However, the above method has the following problems:

[0063] Firstly, the photovoltaic surplus power can only be consumed through the hot water function after reaching a certain threshold value, and the consumption strategy of the photovoltaic surplus power does not consider the actual life demand of the user, and cannot switch from running the hot water function to running the space heating function to meet the space heating demand of the user when the user has a space heating demand, thereby causing the user's discomfort and reducing the user's experience;

[0064] Secondly, when the photovoltaic surplus power is consumed by running the hot water function, the user cannot freely choose to use 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 surplus power is greatly consumed when the hot water is heated by the electric heating function, thereby reducing the income of the photovoltaic surplus power on the grid;

[0065] Thirdly, when the photovoltaic surplus power cannot be put on the grid, the photovoltaic surplus power can only be abandoned, and there is no consumption strategy for the abandoned light.

[0066] Based on this, the application provides a heat pump control method based on photovoltaic residual electricity in various embodiments of the application, which is 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 residual electricity and storing the photovoltaic residual electricity in the energy storage unit, the inverter controlling the heat pump to consume the photovoltaic residual electricity that cannot be uploaded to a power grid when the inverter determines that the photovoltaic residual electricity cannot be uploaded to the power grid, and the method comprising: 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; 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, and consuming the photovoltaic residual electricity that cannot be uploaded to the power grid through the hot water heating function.

[0067] The application will be further described in detail below with reference to the embodiments.

[0068] Figure 1 A flowchart of a heat pump control method based on photovoltaic residual electricity provided by an embodiment of the application is shown in FIG. 1. Figure 1 As shown in FIG. 1, the method comprises:

[0069] Step 101: obtaining first information, the first information being used to indicate whether there is a space heating demand;

[0070] Step 102: 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;

[0071] Step 103: 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, and consuming the photovoltaic residual electricity that cannot be uploaded to the power grid through the hot water heating function.

[0072] Specifically, the method is 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 residual electricity and storing the photovoltaic residual electricity in the energy storage unit, the inverter controlling the heat pump to consume the photovoltaic residual electricity that cannot be uploaded to a power grid when the inverter determines that the photovoltaic residual electricity cannot be uploaded to the power grid; the inverter obtaining first information, determining whether there is a space heating demand based on the first information, and controlling the photovoltaic consumption system to operate a hot water heating function to consume the photovoltaic residual electricity that cannot be uploaded to the power grid according to the space heating demand.

[0073] In a possible implementation, the method can be applied to an inverter integrated in a photovoltaic consumption system, and the inverter can receive and send information through a built-in communication module for controlling the heat pump to consume the photovoltaic 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.

[0074] In a possible implementation, the method can also be used for a controller that is not integrated in the photovoltaic consumption system, to control the heat pump to consume the photovoltaic surplus electricity.

[0075] 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 refer to heat energy that is 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 refer to heat energy that is 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.

[0076] In a possible implementation, according to different environmental heat exchange media, the heat pump can include but is not limited to a water-water (WTW, water to water) heat pump, a water-air (WTA, water to air) heat pump, an air-water (ATW, air to water) heat pump, and an air-air (ATA, air to air) heat pump.

[0077] In a possible implementation, the heat pump in the photovoltaic consumption system can adopt an ATW heat pump, which absorbs air and compresses the air into a high-temperature and high-pressure liquid as a heat source. The functions of the ATW heat pump can include but are not limited to space heating and hot water heating. The space heating can include but is not limited to air conditioning and floor heating, and is used to control the ambient temperature. The hot water heating function can include but is not limited to electric heating and compressor heating, and is used to heat the water in the hot water tank.

[0078] 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 an electric heating assembly in the water tank, which generates heat in the powered state and transfers the heat to the surrounding water, thereby increasing the water temperature. The compressor is provided in the ATW heat pump, and the compressor heating function can be realized by: the compressor compresses air at normal temperature and low pressure into high-temperature and high-pressure gas, which heats the water to be heated in the water tank; then the compressor condenses the high-temperature and high-pressure gas into liquid, which enters the evaporator in the compressor to absorb heat and evaporate into gas, and then becomes high-pressure and low-temperature gas through 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 demand.

[0079] 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.

[0080] In some embodiments, the control of the heat pump from running the hot water heating function to running the space heating function comprises:

[0081] 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,

[0082] determining that the hot water tank in the heat pump has started the electric heating function, and then closing the electric heating function.

[0083] 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;

[0084] 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 started, it indicates that the ATW heat pump is currently in a state of running the hot water heating function by the electric heating function, and the ATW heat pump needs to be controlled to close 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 running the space heating function;

[0085] 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 started, it indicates that the ATW heat pump is currently in a state of running the hot water heating function by 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 running the space heating function.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] Adjusting the current set water temperature value to the target set water temperature value can be in the form of cooling or heating. Cooling can be by turning off the hot water heating function and waiting for the water in the tank to cool down. Heating can be by 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 to heat the current set water temperature value to the target set water temperature value can be set according to actual application requirements, which are not specifically limited in specific applications.

[0090] Through 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.

[0091] In some embodiments, the control of the heat pump to run the hot water heating function comprises:

[0092] Obtaining the running state of the hot water heating function of the heat pump;

[0093] If the hot water heating function of the heat pump is in a standby state, the hot water heating function of the heat pump is turned on.

[0094] determining that the hot water heating function of the heat pump is in a running state, and then dissipating the off-grid photovoltaic residual power through the hot water heating function.

[0095] Specifically, when it is determined according to the first information that the user does not have a space heating demand, a current running state of a hot water heating function of the ATW heat pump is determined, and if the hot water heating function of the ATW heat pump is in a standby state, the hot water heating function is started, and the off-grid photovoltaic residual power is dissipated 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 dissipate the off-grid photovoltaic residual power until the photovoltaic residual power is exhausted, and then the hot water heating function stops running.

[0096] Through the above method, when the user does not have a space heating demand, the ATW heat pump continuously runs the hot water heating function to dissipate and store the off-grid photovoltaic residual power, which can improve the efficiency of the ATW heat pump in dissipating photovoltaic power and reduce energy loss caused by multiple startings and stoppings of the hot water heating function of the ATW heat pump.

[0097] In some embodiments, 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, includes at least one of:

[0098] 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;

[0099] determining that the heat pump has started an electric heating function of a hot water tank, and then stopping the electric heating function;

[0100] 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;

[0101] 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 the upper limit water temperature value;

[0102] The first condition includes:

[0103] a remaining capacity of the energy storage unit is greater than or equal to a starting capacity threshold; and

[0104] the photovoltaic residual power cannot be uploaded to a power grid.

[0105] 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 satisfies a first condition, if the ATW heat pump does not satisfy the first condition, the hot water heating function cannot be run; if the ATW heat pump satisfies the first condition, it is further determined whether the compressor of the ATW heat pump can be started, if the compressor can be started, the hot water heating function is run through the compressor heating function; if the compressor cannot be started, the hot water heating function is run through the electric heating function.

[0106] 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 to run the hot water heating function or the space heating function can be generated by a photovoltaic assembly (such as a solar panel) and stored in the energy storage unit; the photovoltaic assembly is specifically used to convert solar energy into electrical energy, and store the generated electrical energy (i.e. photovoltaic excess electricity) in the energy storage unit for use by the ATW heat pump and / or uploading to the power grid (i.e. uploading to the power grid).

[0107] The remaining capacity of the energy storage unit can refer to the amount of photovoltaic excess electricity remaining in the energy storage unit after uploading the photovoltaic excess electricity to the grid, when the remaining capacity of the energy storage unit is greater than or equal to the starting capacity threshold, it indicates that the current amount of electricity in the energy storage unit is sufficient; when the photovoltaic excess electricity cannot be uploaded to the grid, it can be used by the ATW heat pump, and the excess electricity that has not been consumed by the ATW heat pump can only be abandoned by the photovoltaic consumption system.

[0108] Abandoning light can mean that the grid is saturated with electricity and no longer receives photovoltaic excess electricity from the battery (or battery assembly), i.e. there is excess photovoltaic excess electricity in the battery (or battery assembly) that is not received by the grid.

[0109] For example, 5000 watts of photovoltaic excess electricity is generated by the photovoltaic assembly, and the ATW heat pump can consume 4000 watts of photovoltaic excess electricity, leaving 1000 watts of photovoltaic excess electricity. If the grid does not abandon light, the remaining 1000 watts of photovoltaic excess electricity can be uploaded to the grid, and if the grid abandons light, the grid does not receive 1000 watts of photovoltaic excess electricity, i.e. the photovoltaic excess electricity cannot be uploaded to the grid, i.e. the photovoltaic consumption system abandons light.

[0110] The battery of the ATW heat pump has a remaining capacity greater than or equal to the starting capacity threshold and the photovoltaic excess electricity cannot be uploaded to the grid, i.e. it satisfies the first condition, indicating that the current amount of electricity in the battery is sufficient and cannot be uploaded to the grid, at this time the photovoltaic excess electricity that is to be abandoned (i.e. cannot be uploaded to the grid) can be used to store hot water for free (i.e. run the hot water heating function).

[0111] In a possible implementation, when the ATW heat pump does not satisfy the first condition, representing that the photovoltaic residual power in the current energy storage unit is insufficient or can be uploaded to the power grid, and the ATW heat pump cannot run the hot water heating function to consume the photovoltaic residual power, 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.

[0112] In a possible implementation, when the ATW heat pump satisfies the first condition, representing that the photovoltaic residual power in the current energy storage unit is sufficient and cannot be uploaded to the power grid, and the ATW heat pump can consume the photovoltaic residual power that cannot be uploaded to the power grid 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.

[0113] 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. In the process of running 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 residual power 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 residual power is sufficient), and at this time, the water temperature in the ATW heat pump is equal to the upper limit water temperature value.

[0114] 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 residual power can be consumed while the hot water is stored, and the photovoltaic residual power that cannot be uploaded to the power grid is fully consumed.

[0115] In some embodiments, the determining that the hot water heating function of the heat pump is in a running state, and then consuming the photovoltaic residual power that cannot be uploaded to the power grid by the hot water heating function, includes at least one of the following:

[0116] The determining that the heat pump satisfies the first condition, and then 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 residual power that cannot be uploaded to the power grid by the hot water heating function.

[0117] determining that the heat pump does not satisfy the first condition, the heat pump runs the hot water heating function in the compressor heating mode and satisfies the second condition, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, the running state of the heat pump after a first preset time period is determined, and / or whether the space heating demand exists;

[0118] determining that the heat pump does not satisfy the first condition, the heat pump runs the hot water heating function in the electric heating mode and satisfies the third condition, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, the electric heating function is turned off, the running state of the heat pump after a first preset time period is determined, and / or whether the space heating demand exists;

[0119] The first condition includes:

[0120] The remaining capacity of the energy storage unit is greater than or equal to an opening capacity threshold; and

[0121] The photovoltaic excess electricity cannot be uploaded to the power grid;

[0122] The second condition includes:

[0123] The compressor has run for a second preset time period; and

[0124] The remaining capacity of the energy storage unit is less than an ending capacity threshold, and / or the power of the photovoltaic excess electricity is greater than or equal to a second power threshold;

[0125] The third condition includes:

[0126] The remaining capacity of the energy storage unit is less than an ending capacity threshold, and / or the power of the photovoltaic excess electricity is greater than or equal to a second power threshold.

[0127] 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, the heat pump runs in the compressor heating mode, and the second condition is not satisfied, the heat pump runs normally. If the ATW heat pump does not satisfy the first condition, the heat pump runs in the compressor heating mode, and the second condition is satisfied, the hot water heating function is turned off, and the hot water heating function or the space heating function of the ATW heat pump is run after a first preset time period. If the ATW heat pump does not satisfy the first condition, the heat pump runs in the electric heating mode, and the second condition is not satisfied, the heat pump runs normally. If the ATW heat pump does not satisfy the first condition, the heat pump runs in the electric heating mode, and the second condition is satisfied, the hot water heating function is turned off, and the hot water heating function or the space heating function of the ATW heat pump is run after a first preset time period.

[0128] Here, the second condition refers to that the compressor has run for a second preset time length and the remaining capacity of the energy storage unit is less than an end capacity threshold, and / or, the power of the photovoltaic surplus electricity taken from the power grid is greater than or equal to a second power threshold; the remaining capacity less than the end capacity threshold can represent that the photovoltaic surplus electricity in the energy storage unit that cannot be fed into the grid is insufficient, and the water heating function cannot continue to run to consume the photovoltaic surplus electricity; the power taken from the power grid can refer to the power of the photovoltaic consumption system taken from the power grid, and the power taken from the power grid greater than or equal to the second power threshold represents that the current photovoltaic surplus electricity that cannot be fed into the grid is insufficient, and the photovoltaic consumption system starts to take power from the power grid.

[0129] The first preset time length can be a time length from a current running time, and in the embodiment of the present application, the value of the first preset time length is not specifically limited and can be set according to actual application requirements, for example, the first preset time length can be 15 minutes.

[0130] The photovoltaic consumption system waits for the first preset time length before running the water heating function or the space heating function of the ATW heat pump, which can avoid the state from being frequently switched due to the insufficient power of abandoned light entering and exiting the mode when the ATW heat pump runs the water heating function.

[0131] The second preset time length can be a time length from a current running time, and in the embodiment of the present application, the value of the second preset time length is not specifically limited and can be set according to actual application requirements, for example, the second preset time length can be 5 minutes.

[0132] The determination of the compressor running for the second preset time length before exiting the water heating function can guarantee the reliability and the determined running life of the compressor.

[0133] In one possible implementation, the ATW heat pump satisfies the first condition, which can represent that the photovoltaic surplus electricity in the energy storage unit of the photovoltaic consumption system is sufficient and there is abandoned light, and can support the ATW heat pump to run the water heating function through the electric heating function or the compressor heating function to consume the abandoned photovoltaic surplus electricity.

[0134] In one possible implementation, the ATW heat pump satisfies the first condition, adopts the compressor heating function, and does not satisfy the second condition, which can represent that the photovoltaic surplus electricity in the energy storage unit of the photovoltaic consumption system is still sufficient, and can support the ATW heat pump to continue to run the water heating function through the compressor heating function to consume the abandoned photovoltaic surplus electricity.

[0135] In a possible implementation, the ATW heat pump meets the first condition, adopts the compressor heating function, and meets the second condition, which can represent that the compressor has been running for a first preset time length, and the photovoltaic residual power capacity in the energy storage unit is insufficient to continue supporting the ATW heat pump to run the hot water function through the compressor heating function, and if the running continues, power needs to be taken from the power grid; if the ATW heat pump meets the first condition, adopts the compressor heating function, and meets the second condition, the current set water temperature value of the hot water tank is restored to the target set water temperature value.

[0136] In a possible implementation, the ATW heat pump meets the first condition, adopts the compressor heating function, and does not meet the second condition, which can represent that the compressor of the ATW heat pump has not been running for a first preset time length or the photovoltaic residual power capacity in the energy storage unit can continue to support the ATW heat pump to run the hot water function through the compressor heating function, and then the ATW heat pump normally runs the hot water function through the compressor heating function.

[0137] In a possible implementation, the ATW heat pump meets the first condition, adopts the electric heating function, and meets the third condition, which can represent that the photovoltaic residual power capacity in the energy storage unit is insufficient to continue supporting the ATW heat pump to run the hot water function through the electric heating function, and if the running continues, power needs to be taken from the power grid; if the ATW heat pump meets the first condition, adopts the electric heating function, and meets the third condition, the current set water temperature value is restored to the target set water temperature value, and the hot water function or the space heating function of the ATW heat pump is run again after waiting for a first preset time length.

[0138] In a possible implementation, the ATW heat pump meets the first condition, adopts the electric heating function, and does not meet the third condition, which can represent that the photovoltaic residual power in the energy storage unit of the photovoltaic consumption system is still sufficient, and can support the ATW heat pump to continue to run the hot water function through the electric heating function to consume the abandoned photovoltaic residual power.

[0139] The method provided by the embodiment of the application can use the photovoltaic residual power to run the hot water function or the space heating function of the ATW heat pump when there is photovoltaic residual power that cannot be connected to the network and the remaining capacity of the battery is greater than a certain threshold, so that the free power is fully utilized; when the user has a space heating demand, the running state is immediately adjusted to switch from running the hot water function to running the space heating function, so that the comfort of the user is ensured and the user experience is improved; the consumption strategy is proposed for the abandoned photovoltaic residual power, so that the waste of the photovoltaic residual power is avoided; in addition, the photovoltaic consumption system needs to wait for a first preset time length before exiting the hot water function, so that the state of the photovoltaic consumption system is not frequently switched, and the photovoltaic consumption is more stable.

[0140] Figure 2 A flowchart of a heat pump control method based on photovoltaic residual power is provided for the application embodiment of the application; as shown inFigure 2 The method comprises the following steps:

[0141] Step 201, determining that the ATW heat pump is in a space heating operation state, and entering step 205.

[0142] Step 202, determining that the ATW heat pump is in a space heating standby state and there is a space heating demand, and entering step 205.

[0143] Step 203, determining that the ATW heat pump is in a heating water standby state and there is no space heating demand, and entering step 206.

[0144] Step 204, determining that the ATW heat pump is in a heating water operation state and there is a space heating demand, and entering step 210.

[0145] Step 205, if the strategy has adjusted the heating water operation state, restoring the heating water state.

[0146] Here, the inverter can determine whether Ts (equivalent to the current set water temperature value) of the ATW heat pump is equal to Ts_max (equivalent to the upper limit water temperature value), 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.

[0147] Step 206, determining whether the ATW heat pump meets the condition of abandoning light and the battery SOC ≥ SOC_on (equivalent to the first condition). If yes, entering step 207, and if no, entering step 205.

[0148] Step 207, determining whether the compressor of the ATW heat pump can be turned on. If yes, entering step 208, and if no, entering step 209.

[0149] Step 208, Ts = Ts_max.

[0150] 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 for heating (equivalent to operating the heating water function), and absorbs the photovoltaic residual electricity that cannot be uploaded to the power grid.

[0151] Step 209, Ts = Ts_max and turning on the electric heating.

[0152] 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 for heating (equivalent to operating the heating water function), and absorbs the photovoltaic residual electricity that cannot be uploaded to the power grid.

[0153] Step 210, determine whether the ATW heat pump meets the condition of abandoning light and battery SOC≥SOC_on. If yes, go to step 211, if not, go to step 212.

[0154] Step 211, set Ts=Ts_max.

[0155] Specifically, the ATW heat pump can set the current set water temperature value to the upper limit water temperature value, and start the compressor heating function or the electric heating function for heating, and consume the excess electricity of the photovoltaic power which cannot be uploaded to the power grid.

[0156] Step 212, determine whether the ATW heat pump uses the compressor heating function to heat the current water temperature to the upper limit water temperature. If yes, go to step 213, if not, go to step 214.

[0157] Step 213, determine whether the ATW heat pump meets the condition of compressor running for 5 min, battery SOC<SOC_off, and / or, power taken from the grid≥Pfrom_grid(corresponding to the second condition). If yes, go to step 215, if not, go to step 216.

[0158] Step 214, determine whether the ATW heat pump meets the condition of battery SOC<SOC_off, and / or, power taken from the grid≥Pfrom_grid(corresponding to the third condition). If yes, go to step 217, if not, go to step 218.

[0159] Step 215, restore the heating water state, and continue to execute the program after waiting for 15 min.

[0160] Specifically, if Ts=Ts_max, set Ts=Ts_0, and determine the running state of the ATW heat pump and / or whether there is a space heating demand after 15 min(corresponding to the first preset time length).

[0161] Step 216, continue to run normally.

[0162] Specifically, if the ATW heat pump sets Ts=Ts_max, and starts the compressor heating function for heating, the operation remains unchanged; if the ATW heat pump does not perform any operation, no operation is performed.

[0163] Step 217, restore the heating water state, and continue to execute the program after waiting for 15 min.

[0164] Specifically, if Ts=Ts_max, set Ts=Ts_0, if the electric heating function is started, turn off the electric heating function, and determine the running state of the ATW heat pump and / or whether there is a space heating demand after the first preset time length.

[0165] Step 218: Run as usual.

[0166] Specifically, if the ATW heat pump sets Ts = Ts_max and turns on the electric heating function, the operation remains unchanged; if the ATW heat pump does not perform any operation, then no operation will be performed either.

[0167] 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,

[0168] 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.

[0169] The energy storage unit 302 is used to store the electrical energy generated by the photovoltaic module;

[0170] The inverter 303 is used to perform Figure 1 The method shown;

[0171] 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.

[0172] The air-water ATW heat pump 305 can be used as follows: Figure 4 An ATW heat pump device is shown;

[0173] 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.

[0174] Grid 307 is used to receive surplus photovoltaic power uploaded by the photovoltaic absorption system, or to transmit power to the photovoltaic absorption system.

[0175] 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,

[0176] 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, through the built-in compressor to run the compressor heating function to heat water, and the photovoltaic surplus electricity that cannot be uploaded to the power grid is consumed;

[0177] 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 heating water function and the space heating function according to the first information;

[0178] 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 built-in water tank electric heating assembly 404 is used to run the electric heating function to heat water, and the photovoltaic surplus electricity that cannot be uploaded to the power grid is consumed;

[0179] The water tank electric heating assembly 404 is used for heating the water stored in the domestic hot water tank 403 through the electric heating function;

[0180] The electric three-way valve 405 is used for controlling the ATW heat pump to switch between the heating water function and the space heating function through the inverter 303.

[0181] 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.

[0182] 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 thermal expansion and cold contraction of water 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.

[0183] 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 to meet the space heating demand of the user.

[0184] 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 intelligent electronic devices such as inverters; 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.

[0185] The acquisition module 501 is configured to acquire first information, where the first information is used to indicate whether there is a space heating demand.

[0186] 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 heating water function to operating a space heating function.

[0187] 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 heating water function, and consume the photovoltaic excess electricity that cannot be uploaded to the power grid through the heating water function.

[0188] Specifically, the first control module 502 is configured to determine that a current set water temperature value of a heating water tank in the heat pump is an upper limit water temperature value, and then restore the current set water temperature value of the heating water tank to a target set water temperature value; and / or,

[0189] determine that the heating water tank in the heat pump has started an electric heating function, and then close the electric heating function.

[0190] Specifically, the second control module 503 is configured to acquire an operating state of the heating water function of the heat pump.

[0191] determine that the heating water function of the heat pump is in a standby state, and then start the heating water function of the heat pump.

[0192] determine that the heating water function of the heat pump is in an operating state, and then consume the photovoltaic excess electricity that cannot be uploaded to the power grid through the heating water function.

[0193] 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 heating water tank in the heat pump to a target set water temperature.

[0194] determine that the heating water tank in the heat pump has started an electric heating function, and then close the electric heating function.

[0195] 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 heating water tank in the heat pump to an upper limit water temperature value, and start the electric heating function.

[0196] 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 heating water tank in the heat pump to an upper limit water temperature value.

[0197] The first condition includes:

[0198] The remaining capacity of the energy storage unit is greater than or equal to an opening capacity threshold; and

[0199] The photovoltaic excess electricity cannot be uploaded to the power grid.

[0200] Specifically, the second control module 503 is configured to: when it is determined 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 excess electricity that cannot be uploaded to the power grid by using the hot water heating function;

[0201] When it is determined that the heat pump does not satisfy the first condition, the hot water heating function is operated by using a compressor heating function, and a second condition is satisfied, the current set water temperature value of the hot water tank in the heat pump is restored to a target set water temperature value, and the operating state of the heat pump after a first preset time period and / or whether the space heating demand exists are determined.

[0202] When it is determined that the heat pump does not satisfy the first condition, the hot water heating function is operated by using an electric heating function, and a third condition is satisfied, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, the electric heating function is turned off, and the operating state of the heat pump after the first preset time period and / or whether the space heating demand exists are determined.

[0203] The first condition comprises:

[0204] The remaining capacity of the energy storage unit is greater than or equal to an opening capacity threshold; and

[0205] The photovoltaic excess electricity cannot be uploaded to the power grid.

[0206] The second condition comprises:

[0207] The compressor has operated for a second preset time period; and

[0208] The remaining capacity of the energy storage unit is less than an ending capacity threshold, and / or the power of the photovoltaic excess electricity is greater than or equal to a second power threshold.

[0209] The third condition comprises:

[0210] The remaining capacity of the energy storage unit is less than an ending capacity threshold, and / or the power of the photovoltaic excess electricity is greater than or equal to a second power threshold.

[0211] It should be noted that the control device of the photovoltaic consumption system provided in the above embodiments, when implementing the corresponding photovoltaic residual electricity based heat pump control method, is only exemplified by the above division of the program modules, and in actual application, the above processing 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 described processing. In addition, the device provided in the above embodiments and the corresponding Figure 1 Embodiments of the method shown belong to the same concept, and the specific implementation process is described in the method embodiments, which will not be repeated here.

[0212] To implement the method of the embodiments of the present application, the embodiments of the present application also provide a photovoltaic consumption based heat pump control device, as shown in Figure 6 The device 60 includes a processor 601 and a memory 602 for storing computer programs capable of running on the processor; when the processor 601 runs the computer programs, it performs: obtaining first information, the first information being used to indicate whether there is a space heating demand; based on the first information, determining that there is the space heating demand, and controlling the heat pump to switch from running a heating water function to running a space heating function; based on the first information, determining that there is no space heating demand, and controlling the heat pump to run the heating water function, and consuming the photovoltaic residual electricity that cannot be uploaded to the power grid through the heating water function. Specifically, the device can also perform the method as shown in Figure 1 The method embodiments shown belong to the same concept, and the specific implementation process is described in the method embodiments, which will not be repeated here. Figure 1

[0213] In actual application, the device 60 can also include at least one network interface 603. The various components in the device 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 a data bus in addition to a power 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 device 60 and other devices.

[0214] The memory 602 in the embodiments of the present application is used to store various types of data to support the operation of the device 60.

[0215] ​The method disclosed in the embodiments of the present application can be applied to the processor 601 or implemented by the processor 601. The processor 601 can be an integrated circuit chip having a signal processing capability. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 601 or an instruction in the form of software. The processor 601 described above can be a general 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 present application. The general processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiments of the present application, the foregoing method can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding 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 foregoing method.

[0216] In the 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, micro controllers (MCUs), microprocessors (Microprocessors), or other electronic elements, for executing the foregoing method.

[0217] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program; when the computer program is run by a processor, the following steps are executed: 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 heating water 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 heating water function, and absorbing the photovoltaic excess electricity that cannot be uploaded to the power grid through the heating water function. Specifically, the computer program can also execute the method shown in Figure 1 and the method shown in Figure 1The method embodiments shown belong to the same concept, and the specific implementation process is described in the method embodiments, which will not be repeated here.

[0218] In several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can be in another division manner, for example, a plurality of units or components can be combined or 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 various components shown or discussed can be indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or in other forms.

[0219] The units described above as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on multiple network units; some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0220] In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be realized in the form of hardware or in the form of hardware plus software functional unit.

[0221] 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 above-mentioned program can be stored in a computer readable storage medium, and the program executes the steps including the above-mentioned method embodiments when executed; and the above-mentioned storage medium includes mobile storage device, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and various storage program codes.

[0222] Alternatively, the above-mentioned integrated unit of the present application, if realized in the form of a software function module and sold or used as an independent product, can also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be an inverter, etc.) to execute all or part of the method described in the embodiments of the present application. The foregoing storage medium includes: a mobile storage device, a ROM, a RAM, a magnetic disk or an optical disk, and various media that can store program codes.

[0223] It should be noted that "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0224] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0225] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within 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 surplus electricity, characterized in that, The application 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 electricity and stores the photovoltaic residual electricity in the energy storage unit, when the inverter determines that the photovoltaic residual electricity cannot be uploaded to a power grid, the inverter controls the heat pump to consume the photovoltaic residual electricity which cannot be uploaded to the power grid, and the method comprises the following steps: Obtaining first information, the first information is used to indicate whether there is a space heating demand or not; Based on the first information, it is determined that there is the space heating demand, 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 there is no space heating demand, and the heat pump is controlled to operate the hot water heating function, and the hot water heating function is used to consume the photovoltaic residual electricity which cannot be uploaded to the power grid; The control of the heat pump from operating the hot water heating function to operating the space heating function comprises: If the current set water temperature value of the hot water tank in the heat pump is the upper limit water temperature value, the current set water temperature value of the hot water tank is restored to the target set water temperature value; and / or, If the electric heating function of the hot water tank in the heat pump has been started, 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 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 the hot water heating function of the heat pump is in an operating state, the hot water heating function is used to consume the photovoltaic residual electricity which cannot be uploaded to the power grid.

3. The method of claim 2, wherein, The control of the heat pump from operating the hot water heating function to operating the space heating function comprises: If the heat pump does not meet the first condition, the current set water temperature of the hot water tank in the heat pump is restored to the target set water temperature; If the electric heating function of the hot water tank in the heat pump has been started, the electric heating function is turned off; If 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 the upper limit water temperature value, and the electric heating function is started; If 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 the upper limit water temperature value; The first condition comprises: The remaining capacity of the energy storage unit is greater than or equal to the starting capacity threshold; and The photovoltaic residual electricity cannot be uploaded to the power grid.

4. The method of claim 2, wherein, The control of the heat pump from operating the hot water heating function to operating the space heating function comprises: If 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 the upper limit water temperature value, and the hot water heating function is used to consume the photovoltaic residual electricity which cannot be uploaded to the power grid. determining that the heat pump does not meet the first condition, the heat pump runs the hot water heating function in the compressor heating mode and meets the second condition, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, the running state of the heat pump is determined after a first preset time period, and / or whether there is a space heating demand; determining that the heat pump does not meet the first condition, the heat pump runs the hot water heating function in the electric heating mode and meets the third condition, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, the electric heating function is turned off, the running state of the heat pump is determined after a first preset time period, and / or whether there is a space heating demand; wherein the first condition comprises: the remaining capacity of the energy storage unit is greater than or equal to the start capacity threshold; and the photovoltaic residual electricity cannot be uploaded to the power grid; the second condition comprises: the compressor has been running for a second preset time period; and the remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power of the photovoltaic residual electricity is greater than or equal to the second power threshold; the third condition comprises: the remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power of the photovoltaic residual electricity is greater than or equal to the second power threshold.

5. A photovoltaic hosting system, characterized by, comprises: a photovoltaic assembly for generating photovoltaic residual electricity and storing in an energy storage unit; an energy storage unit for storing the photovoltaic residual electricity generated by the photovoltaic assembly; a heat pump for running a hot water heating function or a space heating function; an inverter for determining that the photovoltaic residual electricity cannot be uploaded to the power grid, controlling the heat pump to absorb the photovoltaic residual electricity generated by the photovoltaic assembly in the energy storage unit which cannot be uploaded to the power grid, 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, the water tank electric heating assembly is located in the hot water tank, 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, and absorbs the photovoltaic residual electricity which cannot be uploaded to the power grid by running the hot water heating function in the electric heating mode; 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 turning off 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, a compressor is located in the heat pump outdoor unit, 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, and absorbs the photovoltaic residual electricity which cannot be uploaded to the power grid by running the hot water heating function in the compressor heating mode.

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, based on the first information, that there is the space heating demand, and control the heat pump to switch from operating the hot water heating function to operating the space heating function; 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 and consume the photovoltaic excess electricity that cannot be uploaded to the power grid through the hot water heating function; The first control module is specifically 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, determine that the hot water tank in the heat pump has started an electric heating function, and then turn off 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 connection and communication among 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 in 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, and when the computer program is executed by at least one processor, the method in any one of claims 1 to 4 is realized.

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