Heat pump control method, device and system based on photovoltaic residual electricity and storage medium

Abstract

The invention discloses a heat pump control method, device and system based on photovoltaic waste electricity and a storage medium, and the method comprises the steps that first information is obtained, and the first information is used for indicating whether a space heating demand exists or not; determining that the space heating requirement exists on the basis of the first information, and controlling the heat pump to be switched from a running water heating function to a running space heating function; and based on the first information, it is determined that the space heating requirement is not met, the heat pump is controlled to operate the water heating function, and the photovoltaic waste electricity which cannot be uploaded to the power grid is consumed through the water heating function. Thus, photovoltaic residual electricity which cannot be uploaded to a power grid is consumed by controlling the heat pump to operate a hot water making function, and waste of photoelectric resources is avoided; when a user generates a space heating demand, the heat pump for photovoltaic absorption is switched from a running water heating function to a running space heating function, so that the space heating demand of the user is met, the comfort of the user during photovoltaic absorption is improved, and the use experience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the field of heating control technology, and in particular to a heat pump control method, device, system and storage medium based on photovoltaic surplus power. Background Art

[0002] Heat pumps generally refer to air energy heat pumps or air source heat pumps, which can convert low-level thermal energy that cannot be directly used (such as the heat contained in the air) into high-level thermal energy that can be used, thereby achieving the purpose of energy saving.

[0003] In the related technology, the heat pump operation control method based on photovoltaic absorption usually increases the water temperature of the domestic hot water tank to an upper limit (such as 70°C) when the photovoltaic surplus power reaches a certain threshold, and turns on the electric heating function in the water tank at the same time, so that the photovoltaic electricity is absorbed in the form of hot water energy storage; part of the photovoltaic surplus electricity that cannot be absorbed by the heat pump can be uploaded to the power grid, bringing additional benefits to users.

[0004] The above control method still has disadvantages. For example, when the photovoltaic surplus power absorption capacity of the heat pump is saturated and the excess photovoltaic surplus power cannot be uploaded to the grid, since there is no absorption strategy for the photovoltaic surplus power that cannot be uploaded to the grid, this part of the photovoltaic surplus power can only be discarded, thereby reducing the utilization rate of photovoltaic resources and causing waste of resources. Summary of the invention

[0005] In order to solve the existing technical problems, the embodiments of the present invention provide a heat pump control method, device, system and storage medium based on photovoltaic surplus power.

[0006] The technical solution of the present invention is achieved in this way:

[0007] In a first aspect, an embodiment of the present invention provides a heat pump control method based on photovoltaic surplus power, which is applied to a photovoltaic consumption system, wherein the photovoltaic consumption system comprises: a photovoltaic component, an energy storage unit, a heat pump and an inverter, wherein the photovoltaic component generates photovoltaic surplus power and stores it in the energy storage unit, and when the inverter determines that the photovoltaic surplus power cannot be uploaded to the grid, the heat pump is controlled to consume the photovoltaic surplus power that cannot be uploaded to the grid; the method comprises:

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

[0009] Determining that there is the space heating demand based on the first information, controlling the heat pump to switch from operating a hot water heating function to operating 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 operate the hot water making function, so as to absorb the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water making function.

[0011] In the above solution, the step of controlling the heat pump to switch from operating the hot water production function to operating the space heating function includes:

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

[0013] If it is determined that the electric heating function of the hot water tank in the heat pump has been turned on, the electric heating function is turned off.

[0014] In the above solution, controlling the heat pump to operate the hot water making function includes:

[0015] Acquiring the operating status of the hot water making function of the heat pump;

[0016] Determining that the hot water making function of the heat pump is in a standby state, then turning on the hot water making function of the heat pump;

[0017] If it is determined that the hot water making function of the heat pump is in operation, the surplus photovoltaic power that cannot be uploaded to the power grid is consumed by the hot water making function.

[0018] In the above solution, the step of determining that the hot water making function of the heat pump is in a standby state and then starting the hot water making function of the heat pump includes at least one of the following:

[0019] If it is determined that 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;

[0020] Determining that the electric heating function of the hot water tank in the heat pump has been turned on, then turning off the electric heating function;

[0021] If it is determined that the heat pump satisfies the first condition and the compressor of the heat pump cannot be turned on, the current set water temperature value of the hot water tank in the heat pump is set as the upper limit water temperature value, and the electric heating function is turned on;

[0022] Determining that the heat pump satisfies the first condition and the compressor of the heat pump can be turned on, setting the current set water temperature value of the hot water tank in the heat pump as the upper limit water temperature value;

[0023] The first condition includes:

[0024] The remaining capacity of the energy storage unit is greater than or equal to the start capacity threshold; and

[0025] The photovoltaic surplus power cannot be uploaded to the power grid.

[0026] In the above scheme, the step of determining that the hot water making function of the heat pump is in operation and absorbing the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water making function includes at least one of the following:

[0027] 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 as the upper limit water temperature value, and the photovoltaic surplus power that cannot be uploaded to the grid is consumed by the hot water making function;

[0028] If it is determined that the heat pump does not meet the first condition, the compressor heating function is used to operate the hot water function and the second condition is met, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, and the operating state of the heat pump after the first preset time is determined, and / or whether there is the space heating demand;

[0029] If it is determined that the heat pump does not meet the first condition, the electric heating function is used to operate the hot water function and the third condition is met, 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 is determined, and / or whether there is the space heating demand;

[0030] The first condition includes:

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

[0032] The photovoltaic surplus power cannot be uploaded to the grid;

[0033] The second condition includes:

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

[0035] The remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power taken from the photovoltaic surplus power is greater than or equal to the second power threshold;

[0036] The third condition includes:

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

[0038] In a second aspect, an embodiment of the present invention provides a photovoltaic consumption system, the system comprising:

[0039] A photovoltaic module, wherein the photovoltaic module is used to generate surplus photovoltaic electricity and store it in an energy storage unit;

[0040] An energy storage unit, the energy storage unit is used to store the photovoltaic surplus electricity generated by the photovoltaic module; a heat pump, the heat pump is used to operate a hot water function or a space heating function;

[0041] An inverter is used to determine that the photovoltaic surplus power cannot be uploaded to the power grid, control the heat pump to absorb the photovoltaic surplus power generated by the photovoltaic components in the energy storage unit that cannot be uploaded to the power grid, and execute the steps of the method described in the first aspect of the embodiment of the present application.

[0042] In the above solution, the heat pump further includes: a wired 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.

[0043] In the above scheme, the heat pump further includes: a hot water tank and a water tank electric heating component, the water tank electric heating component is located in the hot water tank, the inverter controls the heat pump to start the hot water function by setting the current set water temperature value of the hot water tank as the upper limit water temperature value, and / or turning on the water tank electric heating component, and the hot water function is operated by using the electric heating function to consume the photovoltaic surplus power that cannot be connected to the Internet;

[0044] The inverter controls the heat pump to turn off the hot water making function by restoring the upper limit water temperature value of the hot water tank to the target set water temperature value and / or turning off the water tank electric heating component.

[0045] In the above scheme, the heat pump also includes: a heat pump outdoor unit, in which the compressor is located, and the inverter controls the heat pump to start the hot water making function by setting the current set water temperature value of the hot water tank as the upper limit water temperature value, and / or turning on the compressor, and operating the hot water making function by adopting the compressor heating function to absorb the photovoltaic surplus electricity that cannot be connected to the Internet.

[0046] In the above solution, the heat pump further includes: an electric three-way valve, and the inverter controls the heat pump to switch between the hot water making function and the space heating function through the electric three-way valve.

[0047] In a third aspect, an embodiment of the present invention provides a control device for a photovoltaic consumption system, the device comprising: an acquisition module, a first control module and a second control module; wherein the acquisition module is used to acquire first information, the first information being used to indicate whether there is a space heating demand;

[0048] The first control module is used 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 used to determine that there is no space heating demand based on the first information, control the heat pump to operate the hot water making function, and absorb the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water making function.

[0050] In the fourth aspect, an embodiment of the present invention further provides a heat pump control device based on photovoltaic absorption, comprising a network interface, a memory and a processor; wherein the network interface is used to realize connection and communication between components; the memory is used to store a computer program that can be run on the processor; and the processor is used to execute the steps of the method described in the first aspect of the embodiment of the present application when running the computer program.

[0051] In a fifth aspect, an embodiment of the present application provides a storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first aspect of the embodiment of the present application are implemented.

[0052] The technical solution provided by the embodiment of the present invention is a heat pump control method based on photovoltaic surplus power, which is applied to a photovoltaic absorption system. The photovoltaic absorption system includes: photovoltaic components, energy storage units, heat pumps and inverters. The photovoltaic components generate photovoltaic surplus power and store it in the energy storage unit. When the inverter determines that the photovoltaic surplus power cannot be uploaded to the power grid, the heat pump is controlled to absorb the photovoltaic surplus power that cannot be uploaded to the power grid; the method includes: 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 there is the space heating demand, and the heat pump is controlled to switch from running the hot water heating function to running the 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 run the hot water heating function to absorb the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water heating function. In this way, firstly, by controlling the heat pump to operate the hot water making function, the surplus photovoltaic power that cannot be uploaded to the power grid is absorbed, thereby avoiding the waste of photovoltaic resources and improving the utilization rate of photovoltaic resources. Secondly, when the user has a demand for space heating, the heat pump that performs photovoltaic absorption switches from operating the hot water making function to operating the space heating function, thereby meeting the user's space heating demand, improving the user's comfort during photovoltaic absorption, and improving the user's usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic flow chart of a heat pump control method based on photovoltaic surplus power provided by an embodiment of the present invention;

[0054] Figure 2 A schematic flow chart of a heat pump control method based on photovoltaic surplus power provided by an application embodiment of the present invention;

[0055] Figure 3 A schematic diagram of the structure of a photovoltaic consumption system provided by an embodiment of the present invention;

[0056] Figure 4 A schematic diagram of the structure of an ATW heat pump provided by an embodiment of the present invention;

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

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

[0059] Description of reference numerals:

[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. Integral ATW heat pump outdoor unit; 402. Wired controller; 403. Domestic hot water tank; 404. Electric water tank heating; 405. Electric three-way valve; 406. Balancing 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 this method, when it is determined that the photovoltaic surplus power reaches a certain threshold, the electric heating function or the compressor heating function can be turned on to operate the hot water function to increase the set water temperature in the hot water tank to the upper limit (such as 70°C), and the hot water function is used to store energy to consume the photovoltaic surplus power, thereby realizing the use of free electricity to make hot water. However, the above method has the following problems:

[0063] First, when the PV surplus power reaches a certain threshold, it can only be absorbed through the hot water function. The absorption strategy of PV surplus power does not take into account the actual living needs of users. When users have space heating needs, it is impossible to switch from running the hot water function to running the space heating function to meet the user's space heating needs, which causes user discomfort and reduces the user experience.

[0064] Second, when absorbing the excess photovoltaic power by running the hot water function, users 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. When the electric heating function is used to make hot water, it will cause a large loss of excess photovoltaic power, thereby reducing the benefits of connecting the excess photovoltaic power to the grid;

[0065] Third, when the surplus photovoltaic power cannot be connected to the grid, it can only be abandoned, and there is no strategy to absorb the abandoned power.

[0066] Based on this, various embodiments of the present invention provide a heat pump control method based on photovoltaic surplus power, which is applied to a photovoltaic absorption system. The photovoltaic absorption system includes: a photovoltaic component, an energy storage unit, a heat pump and an inverter. The photovoltaic component generates photovoltaic surplus power and stores it in the energy storage unit. When the inverter determines that the photovoltaic surplus power cannot be uploaded to the power grid, the heat pump is controlled to absorb the photovoltaic surplus power that cannot be uploaded to the power grid. The method includes: 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 there is the space heating demand, and the heat pump is controlled to switch from running the hot water heating function to running the 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 run the hot water heating function to absorb the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water heating function.

[0067] The present invention will be further described in detail below in conjunction with the embodiments.

[0068] Figure 1 A schematic flow chart of a heat pump control method based on photovoltaic surplus power provided by an embodiment of the present invention; Figure 1 As shown, the method includes:

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

[0070] Step 102: determining that there is a 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: based on the first information, determine that there is no space heating demand, control the heat pump to operate the hot water making function, and use the hot water making function to absorb the photovoltaic surplus power that cannot be uploaded to the grid.

[0072] Specifically, the method is applied to a photovoltaic absorption system, which includes: photovoltaic components, energy storage units, heat pumps and inverters. The photovoltaic components generate photovoltaic surplus power and store it in the energy storage unit. When the inverter determines that the photovoltaic surplus power cannot be uploaded to the power grid, it controls the heat pump to absorb the photovoltaic surplus power that cannot be uploaded to the power grid; the inverter obtains first information, determines whether there is a space heating demand based on the first information, and controls the photovoltaic absorption system to operate a hot water function according to the space heating demand to absorb the photovoltaic surplus power that cannot be uploaded to the power grid.

[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 to control a heat pump to consume 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, etc.

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

[0075] Here, a heat pump may be a mechanical device that obtains low-grade thermal energy from the air, water or soil in nature and converts it into high-grade thermal energy by consuming electricity to do work; low-grade thermal energy may refer to thermal energy that is difficult to utilize, and low-grade thermal energy may include but is not limited to: seawater thermal energy, geothermal thermal energy, solar energy, etc., and high-grade thermal energy may refer to thermal energy that is easily utilized, and high-grade thermal energy may include but is not limited to: solid fuel thermal energy, electric power thermal energy, mechanical work thermal energy, etc.

[0076] In one possible implementation method, depending on the environmental heat exchange medium, the heat pump may include but is not limited to: water-to-water (WTW) heat pump, water-to-air (WTA) heat pump, air-to-water (ATW) heat pump and air-to-air (ATA) heat pump.

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

[0078] Among them, the ATW heat pump is connected to or provided with a hot water tank (for storing water to be heated). The electric heating function can be achieved by: setting a water tank electric heating component in the water tank, which generates heat when powered on and transfers it to the surrounding water, thereby raising the water temperature. A compressor is provided in the ATW heat pump, and the compressor heating function can be achieved by: the compressor compresses the air at normal temperature and low pressure into high-temperature and high-pressure gas, 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 passes through the compressor to become high-pressure and low-temperature gas. The energy efficiency of the compressor heating function is greater than that of the electric heating function. The use of the compressor heating function can more efficiently meet the user's hot water needs.

[0079] In addition, during the operation of the ATW heat pump, the ATW heat pump cannot operate the space heating function and the hot water making function at the same time; when the space heating function is operating, the hot water making function is in standby state; when the hot water making function is operating, the space heating function is in standby state; users with space heating needs can send external instructions to control the ATW heat pump to switch from operating the hot water making function to operating the space heating function.

[0080] In some embodiments, controlling the heat pump to switch from operating a hot water production function to operating a space heating function includes:

[0081] Determining that the current set water temperature value of the hot water tank in the heat pump is the upper limit water temperature value, then restoring the current set water temperature value of the hot water tank to the target set water temperature value; and / or,

[0082] If it is determined that the electric heating function of the hot water tank in the heat pump has been turned on, the electric heating function is turned off.

[0083] Specifically, upon receiving the first information that there is a space heating demand, the inverter determines whether the current set water temperature value of the hot water tank in the ATW heat pump is the upper limit water temperature value, and / or whether the hot water tank has turned on 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 turned on, it indicates that the ATW heat pump is currently in the state of operating the hot water function through the electric heating function. It is necessary to control the ATW heat pump 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 function, and switch to 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 turned on, it indicates that the ATW heat pump is currently in the state of operating the hot water function through the compressor heating function. It is necessary to control the ATW heat pump to restore the current set water temperature value to the target set water temperature value, exit the hot water function, and switch to 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 function and is directly running the space heating function.

[0087] Here, the currently set water temperature value in the hot water tank can be the temperature that the user can set for the ATW heat pump, or can be a pre-set temperature value. The ATW heat pump heats the water stored in the hot water tank according to the currently set water temperature value. In the embodiment of the present invention, there is no specific limitation on the value of the currently set water temperature value, and it can be set according to actual application requirements. For example, the currently set water temperature value can be 40 degrees Celsius; the target set water temperature value can be the default value of the currently set water temperature value, and the upper limit water temperature value can be the temperature value of the currently 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, and 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; 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] The current set water temperature value can be adjusted to the target set water temperature value by cooling or heating. Cooling can be achieved by turning off the hot water function and waiting for the water in the water tank to cool down. Heating can be achieved by continuing to run the hot water function and heating the current set water temperature value to the target set water temperature value. The method of heating the current set water temperature value to the target set water temperature value can be set according to actual application requirements, and is not specifically limited in specific applications.

[0090] Through the above method, no matter whether the hot water making function of the ATW heat pump is in operation or 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 making function is turned on, the hot water making function is turned off) and run the space heating function, ensuring that the ATW heat pump can adjust the operating status according to user needs at any time, so that the ATW heat pump can immediately meet the user's space heating needs and improve the user experience.

[0091] In some embodiments, controlling the heat pump to operate the hot water production function includes:

[0092] Acquiring the operating status of the hot water making function of the heat pump;

[0093] Determining that the hot water making function of the heat pump is in a standby state, then turning on the hot water making function of the heat pump;

[0094] If it is determined that the hot water making function of the heat pump is in operation, the surplus photovoltaic power that cannot be connected to the grid is consumed by the hot water making function.

[0095] Specifically, when it is determined according to the first information that the user does not have a space heating demand, the current operating status of the hot water making function of the ATW heat pump is determined; if the hot water making function of the ATW heat pump is in standby mode, the hot water making function is turned on to consume the photovoltaic surplus power that cannot be uploaded to the grid; if the hot water making function of the ATW heat pump is already in operation, the hot water making function continues to operate to consume the photovoltaic surplus power that cannot be uploaded to the grid, and the hot water making function is stopped until the photovoltaic surplus power is exhausted.

[0096] Through the above method, when the user has no space heating demand, the ATW heat pump is controlled to continuously operate the hot water making function to absorb and store the photovoltaic surplus power that cannot be uploaded to the power grid. This can improve the efficiency of the ATW heat pump in photovoltaic absorption and reduce the energy loss caused by the repeated start and stop of the ATW heat pump's hot water making function.

[0097] In some embodiments, determining that the hot water making function of the heat pump is in a standby state, and then starting the hot water making function of the heat pump, includes at least one of the following:

[0098] If it is determined that 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;

[0099] Determining that the electric heating function of the hot water tank in the heat pump has been turned on, then turning off the electric heating function;

[0100] If it is determined that the heat pump satisfies the first condition and the compressor of the heat pump cannot be turned on, the current set water temperature value of the hot water tank in the heat pump is set as the upper limit water temperature value, and the electric heating function is turned on;

[0101] Determining that the heat pump satisfies the first condition and the compressor of the heat pump can be turned on, setting the current set water temperature value of the hot water tank in the heat pump as the upper limit water temperature value;

[0102] The first condition includes:

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

[0104] The photovoltaic surplus power cannot be uploaded to the power grid.

[0105] Specifically, when the hot water making function of the ATW heat pump is in 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 making function cannot be operated; 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 making function is operated through the compressor heating function; if the compressor cannot be turned on, the hot water making function is operated through the electric heating function.

[0106] Here, the ATW heat pump is connected to an energy storage unit (such as a battery), and the electricity consumed by the ATW heat pump to operate the hot water function or the space heating function can be generated by photovoltaic components (such as solar panels) and stored in the energy storage unit; the photovoltaic components are specifically used to convert solar energy into electrical energy, and the generated electrical energy (i.e., photovoltaic surplus electricity) is stored in the energy storage unit for use by the ATW heat pump and / or to be connected to the Internet (i.e., uploaded to the power grid).

[0107] The remaining capacity of the energy storage unit may refer to: the amount of photovoltaic surplus power remaining in the energy storage unit after the photovoltaic surplus power is connected to the grid. When the remaining capacity of the energy storage unit is greater than or equal to the start-up capacity threshold, it indicates that there is sufficient power in the current energy storage unit. When the photovoltaic surplus power cannot be connected to the grid, it can be used for the ATW heat pump. The surplus power that has not been fully absorbed by the ATW heat pump can only be abandoned by the photovoltaic absorption system.

[0108] Abandonment of solar power may mean that when the power grid is saturated, it no longer accepts the surplus photovoltaic power in the battery (or battery module) for grid connection, that is, there is surplus photovoltaic power in the battery (or battery module) because the power grid does not accept it.

[0109] For example, if 5000 watts of photovoltaic surplus power is generated by photovoltaic modules, the ATW heat pump can consume 4000 watts of photovoltaic surplus power, leaving 1000 watts of photovoltaic surplus power. If the grid does not abandon the photovoltaic power, the remaining 1000 watts of photovoltaic surplus power can be connected to the grid. If the grid abandons the photovoltaic power, the grid will not receive the 1000 watts of photovoltaic surplus power, that is, the photovoltaic surplus power cannot be uploaded to the grid, which means that the photovoltaic consumption system has abandoned the photovoltaic power.

[0110] The remaining battery capacity of the ATW heat pump is greater than or equal to the start-up capacity threshold and the photovoltaic surplus power cannot be uploaded to the grid, that is, the first condition is met, indicating that the current battery has sufficient power and cannot be uploaded to the grid. At this time, the photovoltaic surplus power to be abandoned (that is, cannot be uploaded to the grid) can be used to store hot water for free (that is, operate the hot water making function).

[0111] In one possible implementation, when the ATW heat pump does not meet the first condition, indicating that the photovoltaic surplus power in the current energy storage unit is insufficient or the photovoltaic surplus power can be uploaded to the power grid, and the ATW heat pump cannot operate the hot water making function to consume the photovoltaic surplus 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 has the electric heating function turned on, the electric heating function is turned off.

[0112] In one possible implementation, when the ATW heat pump meets the first condition, indicating that there is sufficient photovoltaic surplus power in the current energy storage unit and that the photovoltaic surplus power cannot be uploaded to the grid, the ATW heat pump can consume the photovoltaic surplus power that cannot be uploaded to the grid by running the hot water making function, and further determine whether the compressor in the photovoltaic consumption system can be turned on. If the compressor can be turned on, the hot water making function is operated by turning on 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 turned on, the hot water making function is operated by turning on 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 turned on.

[0113] In one possible implementation, the ATW heat pump sets the current set water temperature value as the upper limit water temperature value, and the ATW heat pump operates the hot water making function through the electric heating function or the compressor heating function; in the process of operating the hot water making function, the ATW heat pump may stop operating the hot water making function because it does not meet the first condition (i.e., insufficient photovoltaic surplus power), and at this time the water temperature in the ATW heat pump is not equal to the upper limit water temperature value; the ATW heat pump may continue to operate the hot water making function because it continues to meet the first condition (i.e., sufficient photovoltaic surplus power), and at this time the water temperature in the ATW heat pump is equal to the upper limit water temperature value.

[0114] Through the above method, it is possible to determine whether the compressor can be turned on. If the compressor can be turned on, the hot water making function is only operated through the relatively more energy-efficient compressor heating function. This can reduce the loss of photovoltaic surplus power while storing heat through hot water making, and fully absorb part of the photovoltaic surplus power that cannot be connected to the grid.

[0115] In some embodiments, the determining that the hot water making function of the heat pump is in operation, and absorbing the photovoltaic surplus power that cannot be uploaded to the grid through the hot water making function, includes at least one of the following:

[0116] 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 as the upper limit water temperature value, and the photovoltaic surplus power that cannot be uploaded to the grid is consumed by the hot water making function;

[0117] If it is determined that the heat pump does not meet the first condition, the compressor heating function is used to operate the hot water function and the second condition is met, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, and the operating state of the heat pump after the first preset time is determined, and / or whether there is the space heating demand;

[0118] If it is determined that the heat pump does not meet the first condition, the electric heating function is used to operate the hot water function and the third condition is met, 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 is determined, and / or whether there is the space heating demand;

[0119] The first condition includes:

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

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

[0122] The second condition includes:

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

[0124] The remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power taken from the photovoltaic surplus power is greater than or equal to the second power threshold;

[0125] The third condition includes:

[0126] The remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power taken from the photovoltaic surplus power is greater than or equal to the second power threshold.

[0127] Specifically, when the ATW heat pump is in operation, it is determined whether the ATW heat pump satisfies the first condition. If the first condition is met, the currently set water temperature value of the hot water tank in the heat pump is set as the upper limit water temperature value; if the ATW heat pump does not meet the first condition, uses the compressor heating function and does not meet the second condition, it operates as usual; if the ATW heat pump does not meet the first condition, uses the compressor heating function and meets the second condition, then turns off the hot water function, waits for the first preset time before running the hot water function or space heating function of the ATW heat pump; if the ATW heat pump does not meet the first condition, uses the electric heating function and does not meet the second condition, it operates as usual; if the ATW heat pump does not meet the first condition, uses the electric heating function and meets the second condition, then turns off the hot water function, waits for the first preset time before running the hot water function or space heating function of the ATW heat pump.

[0128] Here, the second condition refers to that the compressor has been running for a second preset time and the remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power consumption of the photovoltaic surplus power is greater than or equal to the second power threshold; the remaining capacity is less than the end capacity threshold, which can indicate that the photovoltaic surplus power capacity that cannot be connected to the Internet in the energy storage unit is insufficient, and the hot water making function cannot continue to operate to absorb the photovoltaic surplus power; the power consumption may refer to the power that the photovoltaic absorption system draws from the power grid, and the power consumption power is greater than or equal to the second power threshold to indicate that the photovoltaic surplus power capacity that cannot be connected to the Internet is insufficient, and the photovoltaic absorption system starts to draw power from the power grid.

[0129] The first preset duration may be a period of time starting from the current running time. In the embodiment of the present invention, there is no specific limitation on the value of the first preset duration and it may be set according to actual application requirements. For example, the first preset duration may be 15 minutes.

[0130] The photovoltaic consumption system waits for the first preset time before running the hot water making function or space heating function of the ATW heat pump, which can avoid the ATW heat pump entering the exit mode due to insufficient abandoned light power when running the hot water making function, resulting in frequent state switching.

[0131] The second preset duration may be a period of time starting from the current running time. In the embodiment of the present invention, the value of the second preset duration is not specifically limited and can be set according to actual application requirements. For example, the second preset duration may be 5 minutes.

[0132] Determining that the compressor has run for the second preset time before exiting the hot water making function can ensure the reliability of the compressor operation and determine the operating life.

[0133] In one possible implementation, the ATW heat pump meets the first condition, which can indicate that there is sufficient photovoltaic surplus power in the energy storage unit of the current photovoltaic absorption system and there is abandoned photovoltaic power. The ATW heat pump can be supported to operate the hot water making function through the electric heating function or the compressor heating function to absorb the abandoned photovoltaic surplus power.

[0134] In one possible implementation, the ATW heat pump meets the first condition, uses the compressor heating function and does not meet the second condition, which can indicate that the photovoltaic surplus power in the current photovoltaic absorption system energy storage unit is still sufficient, and can support the ATW heat pump to continue to operate the hot water function through the compressor heating function to absorb the abandoned photovoltaic surplus power.

[0135] In one possible implementation, the ATW heat pump meets the first condition, uses the compressor heating function and meets the second condition, which can indicate that the compressor has been running for a first preset time, and the photovoltaic surplus power capacity in the energy storage unit is insufficient to continue to support the ATW heat pump to operate the hot water function through the compressor heating function. If it continues to run, it needs to draw electricity from the power grid; if the ATW heat pump meets the first condition, uses 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 one possible implementation, the ATW heat pump meets the first condition, uses the compressor heating function and does not meet the second condition, which can indicate that the compressor of the ATW heat pump has not run for the first preset time or the photovoltaic surplus 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. In this case, the ATW heat pump runs the hot water function through the compressor heating function as usual.

[0137] In one possible implementation, the ATW heat pump meets the first condition, adopts the electric heating function and meets the third condition, which can indicate that the photovoltaic surplus power capacity in the energy storage unit is insufficient to continue to support the ATW heat pump to operate the hot water function through the electric heating function. If it continues to operate, it needs to draw electricity 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 ATW heat pump's hot water function or space heating function is operated after waiting for the first preset time.

[0138] In one possible implementation, the ATW heat pump meets the first condition, uses the electric heating function, and does not meet the third condition. This indicates that the photovoltaic surplus power in the energy storage unit of the current photovoltaic absorption system is still sufficient, and the ATW heat pump can continue to operate the hot water function through the electric heating function to absorb the abandoned photovoltaic surplus power.

[0139] The method provided in the embodiment of the present invention can use the photovoltaic surplus power for the ATW heat pump to operate the hot water making function or the space heating function when there is photovoltaic surplus power that cannot be connected to the Internet and the remaining battery capacity is greater than a certain threshold, thereby making full use of this part of free electricity; when the user has a demand for space heating, the operating state is adjusted in real time, and the operation is switched from the hot water making function to the space heating function, thereby ensuring the user's comfort and improving the user experience; a consumption strategy is proposed for the abandoned photovoltaic surplus power, thereby avoiding the waste of this part of the photovoltaic surplus power; in addition, the photovoltaic consumption system needs to wait for a first preset time before exiting the hot water making function, thereby avoiding frequent state switching in the photovoltaic consumption system, thereby making the photovoltaic consumption more stable.

[0140] Figure 2 A schematic flow chart of a heat pump control method based on photovoltaic surplus power provided by an application embodiment of the present invention; Figure 2 As shown, the method includes:

[0141] Step 201 , determine that the ATW heat pump is in the space heating operation state, and proceed to step 205 .

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

[0143] Step 203 : Determine that the ATW heat pump is in a hot water standby state and there is no space heating demand, and then proceed to step 206 .

[0144] Step 204 : Determine that the ATW heat pump is in a hot water production operation state and there is a space heating demand, and then proceed to step 210 .

[0145] Step 205: If the policy has adjusted the hot water operation state, restore the hot water state.

[0146] Here, the inverter can determine whether the ATW heat pump's Ts (equivalent to the current set water temperature value) 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), then Ts will be restored to Ts_0 (equivalent to the target set water temperature value). If the electric heating function is turned on, then the electric heating function will be turned off.

[0147] Step 206: Determine whether the ATW heat pump meets the solar power abandonment condition and the battery SOC≥SOC_on (equivalent to the first condition). If so, proceed to step 207; if not, proceed to step 205.

[0148] Step 207: Determine whether the compressor of the ATW heat pump can be turned on. If it can be turned on, proceed to step 208; if it cannot be turned on, proceed to step 209.

[0149] Step 208: Set Ts=Ts_max.

[0150] Specifically, the ATW heat pump sets the current set water temperature value as the upper limit water temperature value, and can use the compressor heating function for heating (equivalent to running the hot water making function) to absorb the photovoltaic surplus power that cannot be uploaded to the power grid.

[0151] Step 209: Set Ts=Ts_max and start electric heating.

[0152] Specifically, the ATW heat pump can set the current set water temperature value as the upper limit water temperature value, and use the electric heating function for heating (equivalent to running the hot water function) to absorb the photovoltaic surplus power that cannot be uploaded to the power grid.

[0153] Step 210: Determine whether the ATW heat pump meets the requirement of solar curtailment and the battery SOC≥SOC_on. If the ATW heat pump meets the requirement, proceed to step 211; if not, proceed to step 212.

[0154] Step 211, let Ts=Ts_max.

[0155] Specifically, the ATW heat pump can set the current set water temperature value as the upper limit water temperature value, and turn on the compressor heating function or the electric heating function for heating, so as to absorb the photovoltaic surplus power that 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, proceed to step 213; if no, proceed to step 214.

[0157] Step 213: Determine whether the ATW heat pump meets the following conditions: the compressor has been running for 5 minutes, the battery SOC is less than SOC_off, and / or the power taken is greater than or equal to Pfrom_grid (equivalent to the second condition). If so, proceed to step 215; if not, proceed to step 216.

[0158] Step 214: Determine whether the ATW heat pump satisfies the battery SOC<SOC_off and / or the power taken ≥Pfrom_grid (equivalent to the third condition). If so, proceed to step 217; if not, proceed to step 218.

[0159] Step 215, restore the hot water state, wait for 15 minutes and then continue the program.

[0160] Specifically, if Ts=Ts_max, then let Ts=Ts_0 to determine the operating status of the ATW heat pump after 15 minutes (equivalent to the first preset time) and / or whether there is a space heating demand.

[0161] Step 216: Run as usual.

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

[0163] Step 217, restore the hot water state, wait for 15 minutes and then continue the program.

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

[0165] Step 218: Run as usual.

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

[0167] Figure 3 A schematic diagram of the structure of a photovoltaic consumption system provided by an embodiment of the present invention; Figure 3 As shown, the system includes: photovoltaic components 301, energy storage units 302, inverters 303, power distribution cabinets 304, air-to-water ATW heat pumps 305, power sensors 306 and power grids 307; wherein,

[0168] The photovoltaic assembly 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 absorption system from short circuits and control the fault range when a fault occurs in the photovoltaic absorption system;

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

[0173] The power sensor 306 is used to determine the online power when the inverter 303 controls the photovoltaic consumption system to upload the photovoltaic surplus power to the power grid 307, and to determine the power taken by the photovoltaic consumption system when taking power from the power grid 307;

[0174] The power grid 307 is used to receive the photovoltaic surplus power uploaded by the photovoltaic consumption system, or to transmit power to the photovoltaic consumption system.

[0175] Figure 4 A schematic diagram of the structure of an ATW heat pump provided in an embodiment of the present invention; Figure 4 As shown, the ATW heat pump comprises: an integrated ATW heat pump external unit 401, a wire controller 402, a domestic hot water tank 403, a water tank electric heating component 404 and an electric three-way valve 405; wherein,

[0176] The integrated ATW heat pump external unit 401 is used for the gas circulation of the ATW heat pump, that is, absorbing the air at room temperature and low pressure and discharging the gas at low temperature and high pressure. When the current set water temperature value of the domestic hot water tank 403 is the upper limit water temperature value, the built-in compressor can operate the compressor heating function to produce hot water, and the photovoltaic surplus electricity that cannot be uploaded to the power grid can be consumed;

[0177] The wire controller 402 is used to sense and adjust the temperature, can receive external instructions, determine whether there is a space heating demand according to the external instructions, and send first information to the inverter 303. The inverter 303 controls the ATW heat pump to switch between the hot water function and the space heating function according to the first information;

[0178] The domestic hot water tank 403 is used to store water and keep the water warm. When the current set water temperature value is the upper limit water temperature value, the built-in water tank electric heating component 404 operates the electric heating function to produce hot water, and absorbs the photovoltaic surplus electricity that cannot be uploaded to the grid;

[0179] The water tank electric heating component 404 is used to heat the water stored in the domestic hot water tank 403 through an electric heating function;

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

[0181] For example, Figure 4 As shown, the ATW heat pump may further include a balancing water tank 406, and the balancing water tank 406 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 and protective role for the ATW heat pump.

[0182] For example, Figure 4 As shown, the ATW heat pump may further include an expansion tank 407, and the expansion tank 407 is used for stabilizing pressure and unloading, reducing the impact of thermal expansion and contraction of water in the ATW heat pump, ensuring stable water pressure, and avoiding the ATW heat pump from starting and stopping frequently due to unstable water pressure.

[0183] For example, Figure 4 As shown, the ATW heat pump may further include floor heating 408, and the floor heating 408 is used to operate the space heating function to meet the user's space heating needs.

[0184] Figure 5 A schematic diagram of a control device for a photovoltaic consumption system provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, 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 used 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 used to determine that there is a 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;

[0187] The second control module 503 is used to determine that there is no space heating demand based on the first information, control the heat pump to operate the hot water making function, and absorb the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water making function.

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

[0189] If it is determined that the electric heating function of the hot water tank in the heat pump has been turned on, the electric heating function is turned off.

[0190] Specifically, the second control module 503 is used to obtain the operating state of the hot water making function of the heat pump;

[0191] Determining that the hot water making function of the heat pump is in a standby state, then turning on the hot water making function of the heat pump;

[0192] If it is determined that the hot water making function of the heat pump is in operation, the surplus photovoltaic power that cannot be uploaded to the power grid is consumed by the hot water making function.

[0193] Specifically, the second control module 503 is used to determine that the heat pump does not meet the first condition, and then restore the current set water temperature of the hot water tank in the heat pump to the target set water temperature;

[0194] Determining that the electric heating function of the hot water tank in the heat pump has been turned on, then turning off the electric heating function;

[0195] If it is determined that the heat pump satisfies the first condition and the compressor of the heat pump cannot be turned on, the current set water temperature value of the hot water tank in the heat pump is set as the upper limit water temperature value, and the electric heating function is turned on;

[0196] Determining that the heat pump satisfies the first condition and the compressor of the heat pump can be turned on, setting the current set water temperature value of the hot water tank in the heat pump as the 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 the start capacity threshold; and

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

[0200] Specifically, the second control module 503 is used to determine that the heat pump meets the first condition, then set the current set water temperature value of the hot water tank in the heat pump as the upper limit water temperature value, and consume the photovoltaic surplus power that cannot be uploaded to the grid through the hot water function;

[0201] If it is determined that the heat pump does not meet the first condition, the compressor heating function is used to operate the hot water function and the second condition is met, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, and the operating state of the heat pump after the first preset time is determined, and / or whether there is the space heating demand;

[0202] If it is determined that the heat pump does not meet the first condition, the electric heating function is used to operate the hot water function and the third condition is met, 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 is determined, and / or whether there is the space heating demand;

[0203] The first condition includes:

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

[0205] The photovoltaic surplus power cannot be uploaded to the grid;

[0206] The second condition includes:

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

[0208] The remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power taken from the photovoltaic surplus power is greater than or equal to the second power threshold;

[0209] The third condition includes:

[0210] The remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power taken from the photovoltaic surplus power is greater than or equal to the second power threshold.

[0211] It should be noted that: the control device of the photovoltaic consumption system provided in the above embodiment only uses the division of the above program modules as an example to illustrate when implementing the corresponding photovoltaic surplus power based heat pump control method. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the above-described processing. Figure 1 The embodiments of the method shown belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be repeated here.

[0212] To implement the method of the embodiment of the present invention, the embodiment of the present invention also provides a heat pump control device based on photovoltaic absorption, such as Figure 6 As shown, the device 60 includes: a processor 601 and a memory 602 for storing a computer program that can be run on the processor; when the processor 601 is used to run the computer program, it executes: obtaining first information, the first information is used to indicate whether there is a space heating demand; based on the first information, determining that there is the space heating demand, controlling the heat pump to switch from running the hot water function to running the space heating function; based on the first information, determining that there is no space heating demand, controlling the heat pump to run the hot water function, and absorbing the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water function. Specifically, the device can also perform the following Figure 1 The method shown, and Figure 1 The method embodiments shown belong to the same concept, and their specific implementation processes are detailed in the method embodiments, which will not be repeated here.

[0213] In actual application, the device 60 may further include: at least one network interface 603. The various components in the device 60 are coupled together via a bus system 604. It is understood that the bus system 604 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 604 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 6 In the figure, various buses are marked as bus system 604. There may be at least one processor 601. The network interface 603 is used for wired or wireless communication between the apparatus 60 and other devices.

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

[0215] The method disclosed in the above embodiment of the present invention can be applied to the processor 601, or implemented by the processor 601. The processor 601 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 601 or the instruction in the form of software. The above processor 601 may be a general processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor 601 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiment of the present invention. The general processor may be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present invention, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 602. The processor 601 reads the information in the memory 602 and completes the steps of the above method in combination with its hardware.

[0216] In an exemplary embodiment, the device 60 can be implemented by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD), field programmable gate array (FPGA), general processor, controller, microcontroller (MCU), microprocessor, or other electronic components to execute the aforementioned method.

[0217] The embodiment of the present invention also provides a computer-readable storage medium having a computer program stored thereon; when the computer program is executed by a processor, the following is performed: 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 the hot water heating function to running the 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, so as to absorb the photovoltaic surplus electricity that cannot be uploaded to the power grid through the hot water heating function. Specifically, the computer program can also perform the following operations: Figure 1 The method shown, and Figure 1The method embodiments shown belong to the same concept, and their specific implementation processes are detailed in the method embodiments, which will not be repeated here.

[0218] In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple 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, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

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

[0220] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0221] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), disks or optical disks, etc. Various media that can store program codes.

[0222] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be an inverter, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

[0223] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to 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 embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A heat pump control method based on photovoltaic surplus power, characterized in that: Applied to a photovoltaic consumption system, the photovoltaic consumption system includes: a photovoltaic module, an energy storage unit, a heat pump and an inverter. The photovoltaic module generates photovoltaic surplus electricity and stores it in the energy storage unit. When the inverter determines that the photovoltaic surplus electricity cannot be uploaded to the power grid, the heat pump is controlled to consume the photovoltaic surplus electricity that cannot be uploaded to the power grid. The method includes: Acquire first information, where the first information is used to indicate whether there is a space heating demand; Determining that there is the space heating demand based on the first information, controlling the heat pump 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 making function, so as to absorb the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water making function.

2. The method according to claim 1, characterized in that The controlling the heat pump to switch from operating a hot water production function to operating a space heating function includes: Determining that the current set water temperature value of the hot water tank in the heat pump is the upper limit water temperature value, then restoring the current set water temperature value of the hot water tank to the target set water temperature value; and / or, If it is determined that the electric heating function of the hot water tank in the heat pump has been turned on, the electric heating function is turned off.

3. The method according to claim 1, characterized in that The controlling the heat pump to operate the hot water production function includes: Acquiring the operating status of the hot water making function of the heat pump; Determining that the hot water making function of the heat pump is in a standby state, then turning on the hot water making function of the heat pump; If it is determined that the hot water making function of the heat pump is in operation, the surplus photovoltaic power that cannot be uploaded to the power grid is consumed by the hot water making function.

4. The method according to claim 3, characterized in that Determining that the hot water making function of the heat pump is in a standby state, and then starting the hot water making function of the heat pump, includes at least one of the following: If it is determined that 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; Determining that the electric heating function of the hot water tank in the heat pump has been turned on, then turning off the electric heating function; If it is determined that the heat pump satisfies the first condition and the compressor of the heat pump cannot be turned on, the current set water temperature value of the hot water tank in the heat pump is set as the upper limit water temperature value, and the electric heating function is turned on; Determining that the heat pump satisfies the first condition and the compressor of the heat pump can be turned on, setting the current set water temperature value of the hot water tank in the heat pump as the upper limit water temperature value; The first condition includes: The remaining capacity of the energy storage unit is greater than or equal to the start capacity threshold; and The photovoltaic surplus power cannot be uploaded to the power grid.

5. The method according to claim 3, characterized in that: Determining that the hot water making function of the heat pump is in operation, and absorbing the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water making function, includes at least one of the following: 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 as the upper limit water temperature value, and the photovoltaic surplus power that cannot be uploaded to the grid is consumed by the hot water making function; If it is determined that the heat pump does not meet the first condition, the compressor heating function is used to operate the hot water function and the second condition is met, the current set water temperature value of the hot water tank in the heat pump is restored to the target set water temperature value, and the operating state of the heat pump after the first preset time is determined, and / or whether there is the space heating demand; If it is determined that the heat pump does not meet the first condition, the electric heating function is used to operate the hot water function and the third condition is met, 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 is determined, and / or whether there is the space heating demand; The first condition includes: The remaining capacity of the energy storage unit is greater than or equal to the start capacity threshold; and The photovoltaic surplus power cannot be uploaded to the grid; The second condition includes: 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 taken from the photovoltaic surplus power is greater than or equal to the second power threshold; The third condition includes: The remaining capacity of the energy storage unit is less than the end capacity threshold, and / or the power taken from the photovoltaic surplus power is greater than or equal to the second power threshold.

6. A photovoltaic consumption system, characterized in that: include: A photovoltaic module, wherein the photovoltaic module is used to generate surplus photovoltaic electricity and store it in an energy storage unit; An energy storage unit, the energy storage unit is used to store the photovoltaic surplus electricity generated by the photovoltaic assembly; A heat pump, wherein the heat pump is used to operate a hot water function or a space heating function; An inverter is used to determine that the photovoltaic surplus power cannot be uploaded to the power grid, control the heat pump to absorb the photovoltaic surplus power generated by the photovoltaic components in the energy storage unit that cannot be uploaded to the power grid, and execute the method described in any one of claims 1 to 5.

7. The photovoltaic consumption system according to claim 6, characterized in that: The heat pump further includes 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.

8. The photovoltaic consumption system according to claim 6, characterized in that: The heat pump comprises: a hot water tank and a water tank electric heating component, wherein the water tank electric heating component is located in the hot water tank, and the inverter controls the heat pump to start the hot water function by setting the current set water temperature value of the hot water tank as the upper limit water temperature value and / or turning on the water tank electric heating component, and the hot water function is operated by using the electric heating function to absorb the photovoltaic surplus power that cannot be uploaded to the power grid; The inverter controls the heat pump to turn off the hot water making function by restoring the upper limit water temperature value of the hot water tank to the target set water temperature value and / or turning off the water tank electric heating component.

9. The photovoltaic consumption system according to claim 6, characterized in that: The heat pump also includes a heat pump external unit, in which a compressor is located. The inverter controls the heat pump to start the hot water making function by setting the current set water temperature value of the hot water tank as an upper limit water temperature value and / or turning on the compressor, and operates the hot water making function by using the compressor heating function to absorb the photovoltaic surplus power that cannot be uploaded to the power grid.

10. The photovoltaic consumption system according to claim 6, characterized in that: The heat pump further includes an electric three-way valve, and the inverter controls the heat pump to switch between the hot water making function and the space heating function through the electric three-way valve.

11. A control device for a photovoltaic consumption system according to any one of claims 6 to 10, characterized in that: The device comprises: an acquisition module, a first control module and a second control module; wherein, The acquisition module is used to acquire first information, where the first information is used to indicate whether there is a space heating demand; The first control module is used 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; The second control module is used to determine that there is no space heating demand based on the first information, control the heat pump to operate the hot water making function, and absorb the photovoltaic surplus power that cannot be uploaded to the power grid through the hot water making function.

12. A heat pump control device based on photovoltaic consumption, characterized in that: The device includes a network interface, a memory and a processor; wherein the network interface is used to realize connection communication between components; the memory is used to store a computer program that can be run on the processor; and the processor is used to execute the method described in any one of claims 1 to 5 when running the computer program.

13. 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 according to any one of claims 1 to 5 is implemented.

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