Power grid response control method and device of heating and ventilation device, electronic equipment, heating and ventilation system and storage medium

Abstract

The invention discloses a power grid response control method and device of a heating and ventilation device, electronic equipment, a heating and ventilation system and a storage medium, and relates to the technical field of heating and ventilation control. The method comprises the steps that in response to a power grid load control signal, a target load of the heating and ventilation device in a target time period is determined, and the target time period is a time period corresponding to the power grid load control signal; according to the relation between the current load of the heating and ventilation device and the target load, operation parameters of the heating and ventilation device are adjusted, and the operation parameters comprise the compressor frequency of the heating and ventilation device. According to the technical scheme, the technical problem that an existing heating and ventilation device is not flexible enough in response to the power grid load adjustment requirement is solved.

Description

Technical Field

[0001] The present invention relates to the field of HVAC control technology, and in particular to a power grid response control method, device, electronic equipment, HVAC system and storage medium for a HVAC device. Background Art

[0002] HVAC equipment includes heat pump water heaters, which are devices that use air, groundwater or underground thermal energy to supply hot water, thereby meeting the heating needs of citizens.

[0003] At present, the mainstream heat pump water heaters in the market are basically operated and controlled according to the target water temperature. When the heat pump reaches the set target water temperature, it will automatically stop working or enter a low-power operation state to maintain the water temperature. This control mode focuses on the needs of users (i.e. maintaining a certain temperature of hot water supply) without considering the fluctuation of the grid load. Therefore, it cannot make real-time adjustments according to the load fluctuations of the grid, especially when the grid load is peak, it cannot actively reduce power consumption, nor can it actively increase operation during the valley. It fails to respond well to the needs of grid load adjustment and cannot well support the peak-shaving and valley-filling control of the grid system. Summary of the invention

[0004] The main purpose of the present invention is to provide a grid response control method, device, electronic equipment, HVAC system and storage medium for a HVAC device, aiming to solve the technical problem that the existing HVAC device is not flexible enough in responding to the grid load adjustment demand.

[0005] To achieve the above-mentioned objectives, in a first aspect, the present invention proposes a grid response control method for a HVAC device, comprising: determining a target load of the HVAC device in a target time period in response to a grid load control signal, wherein the target time period is a time period corresponding to the grid load control signal; and adjusting operating parameters of the HVAC device according to a relationship between a current load of the HVAC device and the target load so that the current load of the HVAC device is within a range corresponding to the target load, wherein the operating parameters include a compressor frequency of the HVAC device.

[0006] Preferably, the grid load control signal includes load control parameters, and determining the target load of the HVAC device in the target time period includes: determining a benchmark load of the HVAC device according to preset operating parameters, wherein the benchmark load includes one or more of a benchmark voltage, a benchmark current, a benchmark electrical quantity and a benchmark power; determining the target load according to the load control parameters and the benchmark load.

[0007] Preferably, adjusting the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load includes: maintaining the operating parameters of the HVAC device unchanged in accordance with the current load of the HVAC device being within the target load range corresponding to the power grid load control signal; and reducing or increasing the operating parameters of the HVAC device in accordance with the current load of the HVAC device exceeding the target load range corresponding to the power grid load control signal until the current load of the HVAC device is within the range corresponding to the target load.

[0008] Preferably, according to the current load of the HVAC device exceeding the target load range corresponding to the power grid load control signal, the operating parameters of the HVAC device are reduced or increased, including: according to the power grid load control signal, the power load of the HVAC device is controlled to be not higher than the target load, and the current load of the HVAC device is greater than the target load, and the operating parameters of the HVAC device are reduced; according to the power grid load control signal, the power load of the HVAC device is controlled to be not lower than the target load, and the current load of the HVAC device is less than the target load, and the operating parameters of the HVAC device are reduced.

[0009] Preferably, reducing or increasing the operating parameters of the HVAC device includes: obtaining the current compressor frequency of the HVAC device; controlling the HVAC device to gradually reduce or increase the compressor frequency according to a preset frequency conversion rate starting from the current compressor frequency, and the preset frequency conversion rate represents the frequency change per unit time.

[0010] Preferably, before controlling the HVAC device to gradually reduce or increase the compressor frequency starting from the current compressor frequency at a preset frequency conversion rate, the method also includes: determining the target frequency based on the target load and the current operating parameters of the HVAC device; and controlling the compressor of the HVAC device to operate at the target frequency.

[0011] Preferably, determining the target frequency based on the target load and the current operating parameters of the HVAC device includes: obtaining the current heat source temperature and the current water temperature of the HVAC device; determining the target frequency based on the target load, the current heat source temperature, the current water temperature and a preset relationship library, wherein the preset relationship library includes the matching relationship between the heat source temperature, load, water temperature and compressor frequency of the HVAC device.

[0012] Preferably, adjusting the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load also includes: adjusting the current compressor frequency of the HVAC device according to the current load of the HVAC device being within the range corresponding to the target load; adjusting the current compressor frequency of the HVAC device includes: maintaining the current compressor frequency of the HVAC device unchanged according to the current compressor frequency of the HVAC device being within a preset frequency range; increasing the compressor frequency of the HVAC device according to the current compressor frequency of the HVAC device being less than the preset frequency range until the compressor frequency is equal to the preset frequency.

[0013] Preferably, the method further includes: determining a benchmark load of the HVAC device according to the current heat source temperature, the current water temperature, the preset operating frequency of the compressor and a preset relationship library based on the failure to receive the grid load control signal; and controlling the operating state of the HVAC device according to the benchmark load.

[0014] Preferably, the method also includes: based on the HVAC device satisfying a startup condition, executing the step of adjusting the operating parameters of the HVAC device, the startup condition including at least one of the indoor temperature being lower than a set heating temperature value or receiving a startup instruction from a user; and based on the HVAC device satisfying a shutdown condition, controlling the HVAC device to stop running, wherein the shutdown condition includes that the startup operation time of the HVAC device exceeds a preset time.

[0015] In a second aspect, the present invention further proposes a power grid response control device, which includes: a first processing module, used to determine the target load of a HVAC device in a target time period in response to a power grid load control signal, wherein the target time period is a time period corresponding to the power grid load control signal; a control module, used to adjust the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load, so that the current load of the HVAC device is within the range corresponding to the target load, and the operating parameters include the compressor frequency of the HVAC device.

[0016] In a third aspect, the present invention further proposes an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the control method described in any one of the first aspects.

[0017] In a fourth aspect, the present invention further proposes a HVAC system, comprising a HVAC device and a controller, wherein the controller comprises the control device of the second aspect or the electronic device described in the third aspect; the HVAC device comprises an electrically connected parameter detection module, a component control module and a signal interaction module; the signal interaction module is used to receive a control signal from a power grid; the parameter detection module is used to detect operating parameters of the HVAC device, wherein the operating parameters include one or more of a compressor frequency, a fan speed and an electrically auxiliary thermal power; the controller is used to determine a target load of the HVAC device in a target period in response to a power grid load control signal, and adjust the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load, so that the current load of the HVAC device is within the range corresponding to the target load; the component control module is used to control the operation of each component of the HVAC device according to the adjusted operating parameters. In a fifth aspect, the present invention further proposes a computer-readable storage medium having a computer program stored thereon, characterized in that the program is executed by a processor to implement the steps of the method as described in any one of the first aspects.

[0018] In the technical solution of the present invention, by providing a grid response control method for a HVAC device, the working load of the heat pump water heater can be flexibly adjusted according to the grid load control signal, and the target load of the heat pump water heater can be reset according to the grid load control demand. According to the relationship between the current load and the target load of the HVAC device, the operating parameters such as the compressor frequency of the HVAC device are adjusted to achieve the adjustment of the compressor speed, and then the overall load of the HVAC device is adjusted, so that the overall load of the HVAC device corresponds to the target load, which can realize the peak shifting and valley filling of the grid and balance the peak and valley loads of the grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A flowchart of the steps of a power grid response control method for a HVAC device provided in an embodiment of the present invention; Figure 2 Another step flow chart of the method for controlling the power grid response of a HVAC device provided by an embodiment of the present invention; Figure 3 Another step flow chart of the power grid response control method provided by this embodiment is shown; Figure 4Another step flow chart of the power grid response control method provided by this embodiment is shown; Figure 5 A schematic diagram showing the structure of a power grid response control device provided in an embodiment of the present application is shown; Figure 6 A structural schematic diagram of a HVAC system is shown; Figure 7 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application; Figure 8 A schematic diagram of a storage medium provided in an embodiment of the present application is shown.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] A heat pump water heater is a device based on heat pump technology that converts a low-temperature heat source into a high-temperature heat source through a compressor. Since the current HVAC devices are basically operated and controlled according to the target water temperature, when the heat pump reaches the set target water temperature, it will automatically stop working or enter a low-power operation state to maintain the water temperature. This control mode focuses on the needs of users (i.e. maintaining a certain temperature of hot water supply) without considering the fluctuation of the grid load. Therefore, it cannot be adjusted in real time according to the load fluctuation of the grid, especially when the grid load is peak, it cannot actively reduce power consumption, nor can it actively increase operation during the valley. It fails to respond well to the needs of grid load adjustment and cannot well support the peak-shaving and valley-filling control of the grid system.

[0028] In order to solve the above problems, the present invention provides a power grid response control method for a HVAC device, which can flexibly adjust the working load of the heat pump water heater according to the power grid load control signal, reset the target load of the heat pump water heater according to the power grid load control demand, and adjust the operating parameters of the HVAC device such as the compressor frequency according to the relationship between the current load and the target load of the HVAC device to achieve the adjustment of the compressor speed, and then adjust the overall load of the HVAC device, so that the overall load of the HVAC device corresponds to the target load, which can realize peak shifting and valley filling of the power grid and balance the peak and valley loads of the power grid.

[0029] The following is a description of the embodiments of the present application.

[0030] like Figure 1 The flowchart of the steps of a grid response control method for a HVAC device provided by an embodiment of the present application is shown. The execution subject of the embodiment of the present application may be an electronic device capable of executing the grid response control method, and the electronic device may include but is not limited to a terminal or a server. In this embodiment, the execution subject may be a controller of a heat pump water heater, and the grid response control method includes: S101 . Determine a target load of a HVAC device in a target period in response to a power grid load control signal.

[0031] In one example, the HVAC device can be electrically connected to the grid via a power cord and can also be connected via a communication interface protocol. For example, the HVAC device receives control signals from the grid via the CTA-2045 protocol, enabling communication between the grid and residential equipment for energy management. This allows the heat pump water heater to respond to all different types of analog grid signals in a timely and accurate manner, helping the grid reduce load peaks and valleys and ensuring stable operation of the grid.

[0032] That is to say, the HVAC device can receive the grid load control signal from the grid, and the specific receiving method can be network communication, port status change, voltage change, current change and other methods that can carry information transmission.

[0033] In this embodiment, the grid load control signal is used to determine the target load, and the control target of the grid load control signal can be a quantitative index such as power, current, and operation time. Specifically, the grid load control signal includes a load control parameter, and the load control parameter is a percentage control parameter. For example, under normal circumstances, the maximum operating load of the heat pump water heater is 1000W, and the load control parameter is 50%, then the target load is 50% of 1000 W, that is, 500W. It can be seen that for different grid load control signals, different target loads can be obtained, and then the HVAC device can be controlled according to different target loads, so that the application scenarios of the HVAC device are wider.

[0034] The target time period of this embodiment is the time period corresponding to the grid load control signal. For example, when the heat pump water heater is operating normally and does not receive the grid load control signal, the grid communication port state of the water heater is 0. After receiving the grid load control signal, the grid communication port state of the water heater is 1. When the grid cancels the grid load control signal, the grid communication port state of the water heater becomes 0 again. The time period when the grid communication port state of the water heater is 1 is the target time period.

[0035] In another example, when the power grid load control signal includes a specific operation time, the target time period refers to a time period corresponding to the operation time, for example, the operation time is from 19:00 to 22:00 every day. S102: Adjust operating parameters of the HVAC device according to the relationship between the current load and the target load of the HVAC device.

[0036] According to the relationship between the current load and the target load of the HVAC device, the purpose of adjusting the operating parameters of the HVAC device is to control the current load of the HVAC device to be less than or equal to the target load, so that the HVAC device can respond to the power grid load control signal.

[0037] In one example, the regulated operating parameter may be the compressor frequency of the HVAC device, the speed of the fan of the HVAC device, the operating power of the electric auxiliary heating in the HVAC device, or other parameters that affect the load of the HVAC device.

[0038] Adjusting the load of the HVAC device by adjusting the compressor frequency is suitable for scenarios with variable frequency water heaters. In this way, the variable frequency HVAC system can dynamically adjust the working state of the compressor according to load changes so that the current load of the HVAC device is within the range corresponding to the target load, reducing the peak load of the power grid, improving the stability of the power grid, and better adapting to load changes. It can also achieve more precise indoor temperature control and reduce temperature fluctuations.

[0039] The grid response control method for the HVAC device provided in this embodiment can respond to the grid load control signal, reset the target load of the heat pump water heater, adjust the operating parameters such as the compressor frequency of the HVAC device according to the relationship between the current load and the target load of the HVAC device, and flexibly adjust the working load of the heat pump water heater, thereby optimizing the grid load distribution and improving energy utilization efficiency. The overall load of the HVAC device corresponds to the target load, and can achieve peak shifting and valley filling of the grid, balance the peak and valley loads of the grid, and help to achieve stable operation of the grid and energy conservation.

[0040] Furthermore, the grid load control signal includes load control parameters to determine the target load of the HVAC device in the target time period, including: determining a benchmark load of the HVAC device based on preset operating parameters, wherein the benchmark load includes one or more of a benchmark voltage, a benchmark current, a benchmark electrical quantity and a benchmark power; and determining the target load based on the load control parameters and the benchmark load.

[0041] In this embodiment, the preset operating parameters refer to the parameters corresponding to the actual performance of the HVAC device under normal conditions, such as the voltage, current, compressor frequency and other parameters when the HVAC device operates normally according to the temperature set by the user without the intervention of the grid load control signal.

[0042] The benchmark load of the HVAC device determined according to preset operating parameters refers to its rated load or maximum load on the power grid determined based on the actual performance of the heat pump water heater, such as the maximum input power, maximum current, average power or average current of the heat pump water heater, which can represent the power consumption of the heat pump water heater.

[0043] In this embodiment, the control target of the power grid load control signal may be a quantitative index such as power, current, operation time, etc. Correspondingly, the reference load includes one or more of reference voltage, reference current, reference quantity and reference power, so as to enable the HVAC device to respond to more control signals and improve the application scope of the HVAC device in this embodiment.

[0044] In one example, the load control parameter is used to indicate the relationship between the target load and the reference load. For example, if the grid load control signal is to control the power usage to be no higher than a percentage (A%) of the reference power, then the load control parameter is A%.

[0045] In this embodiment, the benchmark load of the HVAC device determines the target load according to the product of the load control parameter and the benchmark load of the HVAC device, which can be expressed as follows: Formula 1 In formula 1: PL is the target load, is the base load of the HVAC equipment, is the load control parameter.

[0046] The above embodiment first calculates the benchmark load of the HVAC device, and then calculates the target load required to respond to the grid load control signal based on the benchmark load. This can improve the calculation accuracy of the target load, that is, it can achieve load control within the energy efficiency range of the HVAC device, respond to grid demand, and more accurately control the operating status of the HVAC device.

[0047] Furthermore, based on the relationship between the current load of the HVAC device and the target load, the operating parameters of the HVAC device are adjusted, including: based on the current load of the HVAC device being within the target load range corresponding to the power grid load control signal, the operating parameters of the HVAC device are maintained unchanged; based on the current load of the HVAC device exceeding the target load range corresponding to the power grid load control signal, the operating parameters of the HVAC device are reduced or increased until the current load of the HVAC device is within the range corresponding to the target load.

[0048] In one example, if the grid load control signal is to control the power load of the HVAC device not to be higher than the target load, taking the operating parameter as the compressor frequency, then, at the current load of the HVAC device PL HP Less than or equal to PL ,Right now PL HP ≤ PL In this case, maintain the existing control and keep the compressor frequency of the HVAC unit unchanged.

[0049] In one example, if the grid load control signal is to control the power load of the HVAC device to be not less than the target load, then, at the current load of the HVAC device PL HP Greater than or equal to PL ,Right now PL HP ≥PL In this case, maintain the existing control and keep the compressor frequency of the HVAC unit unchanged.

[0050] When the current load of the HVAC device exceeds the target load range corresponding to the grid load control signal, it indicates that the operating parameters of the HVAC device need to be adjusted so that the current load is within the target load range corresponding to the grid load control signal.

[0051] Specifically, according to the current load of the HVAC device exceeding the target load range corresponding to the power grid load control signal, the operating parameters of the HVAC device are reduced or increased, including: according to the power grid load control signal, the power load of the HVAC device is controlled to be not higher than the target load, and the current load of the HVAC device is greater than the target load, so the operating parameters of the HVAC device are reduced; according to the power grid load control signal, the power load of the HVAC device is controlled to be not lower than the target load, and the current load of the HVAC device is less than the target load, so the operating parameters of the HVAC device are reduced.

[0052] Continuing with the above example, if the grid load control signal is to control the power load of the HVAC device not to exceed the target load, the current load PL of the HVAC device HP Greater than PL, that is, PL HP >PL, reduce the compressor frequency of the HVAC unit until the current load PL HP Less than or equal to PL.

[0053] If the grid load control signal is to control the power load of the HVAC device to be not lower than the target load, then the current load PL of the HVAC device HP Less than PL, that is, PL HP When the load is less than PL, the compressor frequency of the HVAC system is increased until the current load PL HP Greater than or equal to PL.

[0054] This embodiment can flexibly adjust the compressor frequency according to the current load of the HVAC device. The algorithm is simple and can realize dynamic adjustment of the power load of the HVAC device within the target period. Through this load operation parameter adjustment control strategy, the HVAC device can flexibly respond to the power grid load control signal.

[0055] Specifically, lowering or increasing the operating parameters of the HVAC device includes: obtaining the current compressor frequency of the HVAC device; controlling the HVAC device to gradually reduce or increase the compressor frequency according to a preset frequency conversion rate starting from the current compressor frequency, and the preset frequency conversion rate represents the frequency change per unit time.

[0056] In one example, the preset frequency conversion rate is, for example, 2 Hz / 10S. If the compressor frequency of the HVAC device is reduced, the compressor frequency is controlled to be reduced at a rate of 2 Hz / 10S. If the compressor frequency of the HVAC device is increased, the compressor frequency is controlled to be increased at a rate of 2 Hz / 10S.

[0057] This embodiment sets a preset frequency conversion rate so that the compressor frequency gradually decreases or increases according to the frequency change per unit time, which can reduce the current impact caused by sudden frequency fluctuations and improve the stability of the power grid.

[0058] In another example, before controlling the HVAC device to gradually reduce or increase the compressor frequency starting from the current compressor frequency at a preset frequency conversion rate, the method of this embodiment also includes: determining the target frequency based on the target load and the current operating parameters of the HVAC device; and controlling the compressor of the HVAC device to operate at the target frequency.

[0059] It is understandable that the operating parameters of the HVAC device directly affect its power load. After the target load is determined, this embodiment determines the target frequency corresponding to the target load through the target load.

[0060] For example, under the water temperature and ambient temperature corresponding to the current operating parameters, when the HVAC device power load is the benchmark load, the corresponding current operating frequency is 60Hz, and the target frequency required for the HVAC device power load to be the target load is 50Hz, then the compressor is directly controlled to operate at the target frequency of 50Hz.

[0061] This embodiment can directly control the compressor of the HVAC device to change from the current operating frequency directly to the target frequency operation, can quickly respond to the power grid load control signal, and improve the power grid signal response efficiency.

[0062] Specifically, the target frequency is determined according to the target load and the current operating parameters of the HVAC device, including: obtaining the current heat source temperature and the current water temperature of the HVAC device; determining the target frequency according to the target load, the current heat source temperature, the current water temperature and a preset relationship library, wherein the preset relationship library includes the matching relationship between the heat source temperature, load, water temperature and compressor frequency of the HVAC device.

[0063] In one example, the current heat source temperature and the current water temperature of the HVAC device can be obtained by setting a temperature sensor in the heat source system, wherein the heat source temperature refers to the ambient temperature that provides the heat source for the heat pump water heater, and the water temperature refers to the temperature of the object heated by the heat source, that is, the water temperature in the pipe of the heat pump water heater. Based on the working principle of the heat pump water heater, it can be known that for the heat pump water heater, the heat source temperature is equivalent to the ambient temperature of the heat pump water heater, and there is a corresponding relationship between the ambient temperature of the heat pump water heater, the water temperature in the pipe of the heat pump water heater, the compressor operating frequency and the power load. In this embodiment, the relationship between the four is stored in a preset relationship library, which can be a relationship table. Then, the compressor operating frequency corresponding to the target load, the current heat source temperature and the current water temperature can be obtained by looking up the table, that is, the target frequency.

[0064] The matching relationship between the heat source temperature, load, water temperature and compressor frequency of the HVAC device can be expressed by the following formula: Formula 2 In formula 2: is the heat pump power load, Ta is the heat source temperature, Tw is the water temperature, Fr is the compressor operating frequency, Indicates the corresponding heat pump power load when the heat source temperature Ta, water temperature Tw and compressor operating frequency Fr are determined. .

[0065] That is, the compressor operating frequency The following relationships exist between heat source temperature, load, and water temperature: , then when the heat pump power load It is equal to the target load PL required by the power grid, that is, When , the corresponding compressor operating frequency, that is, the target frequency, can be determined.

[0066] The above-mentioned embodiment can realize fast and accurate determination of the target frequency based on the target load based on the target load and the preset relationship library, thereby enabling the HVAC device to quickly respond to the grid load control signal, thereby improving the grid response rate and enhancing the intelligence level of the system.

[0067] In one example, the operating parameters of the HVAC device are adjusted according to the relationship between the current load of the HVAC device and the target load, which also includes: adjusting the current compressor frequency of the HVAC device according to the current load of the HVAC device being within the range corresponding to the target load. In this way, when the current load of the HVAC device meets the target load requirement, the HVAC device can still operate within a preset compressor frequency range, thereby improving system stability.

[0068] Among them, the current compressor frequency of the HVAC device is adjusted, including: based on the current compressor frequency of the HVAC device being within a preset frequency range, maintaining the current compressor frequency of the HVAC device unchanged; based on the current compressor frequency of the HVAC device being less than the preset frequency range, increasing the compressor frequency of the HVAC device until the compressor frequency is equal to the preset frequency.

[0069] For example, if the grid load control signal is to control the power load of the HVAC device to be no higher than the target load, then based on the current load of the HVAC device being less than or equal to the target load, and the current compressor frequency of the HVAC device being greater than or equal to the preset frequency, the current compressor frequency of the HVAC device is maintained unchanged; based on the current load of the HVAC device being less than or equal to the target load, and the current compressor frequency of the HVAC device being less than the preset frequency, the compressor frequency is gradually increased starting from the current compressor frequency until the current compressor frequency of the HVAC device is equal to the preset frequency.

[0070] That is to say, in this embodiment, when the current load of the HVAC device meets the target load requirement, the compressor frequency is also regulated by the relationship between the current compressor frequency and the preset frequency range, so that the HVAC device can not only meet the grid load control requirements, but also operate within the preset compressor frequency range, thereby improving system stability.

[0071] Furthermore, the method of this embodiment also includes: determining a benchmark load of the HVAC device based on the current heat source temperature, the current water temperature, the preset operating frequency of the compressor and a preset relationship library in response to not receiving a grid load control signal; and controlling the operating state of the HVAC device based on the benchmark load.

[0072] When the heat pump water heater does not receive the grid load control signal, it indicates that the heat pump water heater is operating according to the benchmark load. At this time, the benchmark load corresponding to the current performance of the heat pump water heater can be found in the preset relationship library based on the current heat source temperature, the current water temperature, the preset operating frequency of the compressor and the preset relationship library, and the operating state of the HVAC device can be controlled according to the benchmark load.

[0073] That is to say, when the heat pump water heater does not receive the grid load control signal, it operates normally according to the benchmark load. When the heat pump water heater receives the grid load control signal, it responds to the grid load control signal. In this way, the power load of the HVAC device can be flexibly adjusted according to the actual power usage and grid conditions to adapt to different operating conditions.

[0074] Furthermore, the method of this embodiment also includes: executing the step of adjusting the operating parameters of the HVAC device based on the HVAC device satisfying the startup conditions; and controlling the HVAC device to stop running based on the HVAC device satisfying the shutdown conditions, wherein the shutdown conditions include that the startup operation time of the HVAC device exceeds a preset time.

[0075] In one example, after obtaining the grid load control signal, it is possible to detect whether the HVAC device is in the on state. If it is in the on state, the method shown in the above steps S101~S102 is executed. If it is not in the on state, the HVAC device is continuously detected to see whether it meets the start-up conditions.

[0076] For example, the power-on condition may be that the indoor temperature is lower than the set heating temperature value, that a power-on command from the user is received, that a set power-on time is reached, etc.

[0077] In one example, after the HVAC device adjusts the power load within the target load range in response to the grid load control signal, it also continuously detects whether the HVAC device meets the shutdown conditions. If the shutdown conditions are met, the HVAC device is controlled to stop running to save energy.

[0078] In one example, the shutdown condition may be that the HVAC device's startup operation time exceeds a preset time limit, the indoor temperature reaches a set comfort temperature, an equipment failure occurs, or the total energy consumption within a set time period exceeds a preset energy consumption, etc.

[0079] In the above embodiment, when the heating and ventilation device meets the startup conditions or shutdown conditions, timely and accurate control of the heating and ventilation device startup and shutdown can avoid unnecessary energy waste and significantly reduce energy consumption. Avoiding the equipment from running unnecessarily for a long time or running under inappropriate conditions can reduce the wear of the equipment and extend its service life.

[0080] The above embodiment is described below with a specific example. Figure 2 Another step flow chart of a power grid response control method provided by an embodiment of the present application is shown as follows: Figure 2 As shown: In one example, the load control parameter grid load is percentage control, for example, the base load of the heat pump water heater is 1000 W, the grid load control parameter is 50%, and the current ambient temperature (heat source temperature) is 44°C, then the control method according to the present invention is: S1: Receive the grid load control signal.

[0081] The heat pump water heater detects that the grid load control is effective through the grid signal port status, and the control target is a power input not exceeding 50% (load control parameter).

[0082] S2: Determine the target load according to the grid load control signal.

[0083] The heat pump water heater determines the target load according to the grid load control signal and the benchmark load transmitted by the grid. .

[0084] Assume that the grid load control signal is to control the power load of the HVAC device not to exceed the target load, that is, to control the power load of the HVAC device not to exceed .

[0085] S3: Adjust the operation control strategy of the HVAC device according to the current load and target load of the HVAC device.

[0086] In this embodiment, different operation control strategies are used for different grid load control signals and different current loads, as shown in the following example: Figure 3 and Figure 4 Steps shown.

[0087] S4: Detect whether the grid load control signal is cancelled / terminated.

[0088] It is detected that the grid load control signal is cancelled, and the control method before the grid load control signal takes effect is restored.

[0089] S5: Detect that the grid load control signal is cancelled / terminated, exit the grid response control, and control the HVAC device according to the reference load.

[0090] like Figure 3 As shown, Figure 3 Another step flow chart of the power grid response control method provided by this embodiment is shown.

[0091] By detecting whether the HVAC unit is in the on state, if it is in the on state, the operation control strategy of the HVAC device is adjusted according to the current load and target load of the HVAC device. If it is not in the on state, the HVAC device is continuously detected to see whether it meets the start-up conditions.

[0092] When the unit is powered on, check whether the current power P of the unit is greater than the control target of 500W. If P>500W, reduce the compressor frequency Fr at a rate of 2Hz / 10S, and continue to detect the current power P of the unit until P≤500W. If the current power P is less than or equal to the control target of 500W, check whether the current compressor frequency of the compressor is less than the target frequency (preset frequency) of the compressor under normal control. If the current compressor frequency is greater than or equal to the preset frequency, maintain the current compressor frequency of the HVAC device unchanged; according to the current load of the HVAC device being less than or equal to the target load, and the current compressor frequency of the HVAC device being less than the preset frequency, increase the compressor frequency of the HVAC device so that the current compressor frequency reaches the target frequency.

[0093] At the same time, it also detects whether the HVAC device meets the shutdown conditions. If the shutdown conditions are met, the HVAC device is controlled to stop running. The shutdown conditions include that the startup running time of the HVAC device exceeds the preset time, that is, when the preset maximum heating time is reached, the HVAC device is controlled to stop running.

[0094] This embodiment can quickly respond to the grid load control signal and flexibly adjust the compressor frequency according to the current load of the HVAC device. The algorithm is simple and can realize dynamic adjustment of the power load of the HVAC device within the target time period. Through this load operation parameter adjustment control strategy, the HVAC device can flexibly respond to the grid load control signal.

[0095] like Figure 4 As shown, Figure 4 Another step flow chart of the power grid response control method provided in this embodiment is shown.

[0096] Figure 4 and Figure 3The difference is that when it is detected that the current power P of the unit is greater than the control target 500W, that is, P>500W, the target frequency is determined according to the target load and the current operating parameters of the HVAC device, and the compressor of the HVAC device is controlled to operate at the target frequency. For example, the target load is 1, then according to the compressor operating frequency The target frequency is obtained by the relationship between the heat source temperature, load, and water temperature. ,For example, 50Hz, then at the current compressor frequency > In the case of Adjust to , it can quickly respond to the grid load control needs, and then continue to detect whether the current power of the unit is greater than the control target of 500W.

[0097] This embodiment can directly control the compressor of the HVAC device to change from the current operating frequency directly to the target frequency operation, can quickly respond to the power grid load control signal, and improve the power grid signal response efficiency.

[0098] The grid response control method for the HVAC device provided by the present invention can flexibly adjust the working load of the heat pump water heater according to the grid load control signal, reset the target load of the heat pump water heater according to the grid load control demand, and adjust the operating parameters such as the compressor frequency of the HVAC device according to the relationship between the current load and the target load of the HVAC device to achieve the adjustment of the compressor speed, and then adjust the overall load of the HVAC device, so that the overall load of the HVAC device corresponds to the target load, which can realize the peak shifting and valley filling of the grid and balance the peak and valley loads of the grid.

[0099] Figure 5 A schematic diagram of the structure of a power grid response control device provided in an embodiment of the present application is shown. Figure 5 As shown, the power grid response control device 300 includes: The first processing module 301 is used to determine the target load of the HVAC device in a target period in response to the grid load control signal, where the target period is the period corresponding to the grid load control signal; The control module 302 is used to adjust the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load so that the current load of the HVAC device is within the range corresponding to the target load, and the operating parameters include the compressor frequency of the HVAC device.

[0100] The power grid response control device provided in the above-mentioned embodiment of the present application and the power grid response control method provided in the embodiment of the present application are based on the same application concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0101] This embodiment provides a HVAC system. Figure 6 A schematic diagram of the structure of a HVAC system is shown. Figure 6 The HVAC system 600 includes a HVAC device 602 and a controller 601. The controller 601 includes the control device or electronic device of the above-mentioned embodiment. In one example, the HVAC device of this embodiment is a heat pump water heater.

[0102] Furthermore, the HVAC device 601 includes an electrically connected parameter detection module 603, a component control module 604 and a signal interaction module 605; the signal interaction module 605 is used to receive the control signal of the power grid; the parameter detection module 603 is used to detect the operating parameters of the HVAC device, and the operating parameters include one or more of the compressor frequency, the fan speed and the electric auxiliary thermal power; the controller 602 is used to respond to the power grid load control signal, determine the target load of the HVAC device in the target time period, and adjust the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load, so that the current load of the HVAC device is within the range corresponding to the target load; the component control module 604 is used to control the operation of each component of the HVAC device according to the adjusted operating parameters.

[0103] The HVAC system provided in the above-mentioned embodiment of the present application and the power grid response control method provided in the embodiment of the present application are based on the same application concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0104] This embodiment provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned power grid response control method.

[0105] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown. Figure 7 As shown, the electronic device 20 includes: a processor 200, a memory 201, a bus 202 and a communication interface 203, and the processor 200, the communication interface 203 and the memory 201 are connected via the bus 202; the memory 201 stores a computer program that can be run on the processor 200, and the processor 200 executes the method provided in any of the aforementioned embodiments of the present application when running the computer program.

[0106] The memory 201 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 203 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0107] The bus 202 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory 201 is used to store programs, and the processor 200 executes the programs after receiving the execution instructions. The power grid response control method of the HVAC device disclosed in any implementation of the embodiment of the present application may be applied to the processor 200, or implemented by the processor 200.

[0108] The processor 200 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 or software instructions in the processor 200. The above processor 200 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a readily available programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 201, and the processor 200 reads the information in the memory 201 and completes the steps of the above method in combination with its hardware.

[0109] The electronic device provided in the above-mentioned embodiments of the present application and the power grid response control method provided in the embodiments of the present application are based on the same application concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0110] The present application also provides a computer-readable storage medium corresponding to the power grid response control method of the HVAC device provided in the above embodiment. Figure 8 , which shows a computer-readable storage medium 30, which may be an optical disc, on which a program product is stored, which may be an operating system, application software, game, tool software, etc. The program product includes a computer program, which usually exists in source code or compiled binary form. When the computer program is run by a processor, it will execute the power grid response control method provided by any of the aforementioned embodiments.

[0111] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical or magnetic storage media, which are not listed here one by one.

[0112] The computer-readable storage medium provided in the above-mentioned embodiments of the present application and the power grid response control method of the HVAC device provided in the embodiments of the present application are based on the same application concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0113] In the above text, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0114] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, 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 (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0115] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A power grid response control method for a HVAC device, characterized in that: include: In response to the grid load control signal, determining the target load of the HVAC device in a target period, the target period being the period corresponding to the grid load control signal; According to the relationship between the current load of the HVAC device and the target load, the operating parameters of the HVAC device are adjusted so that the current load of the HVAC device is within the range corresponding to the target load, and the operating parameters include the compressor frequency of the HVAC device.

2. The method according to claim 1, characterized in that The grid load control signal includes a load control parameter, and determining the target load of the HVAC device in the target period includes: Determine the reference load of the HVAC device according to preset operating parameters, wherein the reference load includes one or more of a reference voltage, a reference current, a reference quantity and a reference power; The target load is determined according to the load control parameter and the reference load.

3. The method according to claim 1, characterized in that The adjusting the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load includes: Maintaining the operating parameters of the HVAC device unchanged within the target load range corresponding to the power grid load control signal according to the current load of the HVAC device; According to the current load of the HVAC device exceeding the target load range corresponding to the power grid load control signal, the operating parameters of the HVAC device are reduced or increased until the current load of the HVAC device is within the range corresponding to the target load.

4. The method according to claim 3, characterized in that According to the current load of the HVAC device exceeding the target load range corresponding to the power grid load control signal, reducing or increasing the operating parameters of the HVAC device, including: According to the power grid load control signal, the power load of the HVAC device is controlled not to be higher than the target load, and the current load of the HVAC device is greater than the target load, reducing the operating parameters of the HVAC device; According to the grid load control signal, the power load of the HVAC device is controlled to be not lower than the target load, and the current load of the HVAC device is less than the target load, so that the operating parameters of the HVAC device are reduced.

5. The method according to claim 3 or 4, characterized in that The lowering or increasing of the operating parameters of the HVAC device includes: Obtaining a current compressor frequency of the HVAC device; The HVAC device is controlled to gradually reduce or increase the compressor frequency according to a preset frequency conversion rate starting from the current compressor frequency, wherein the preset frequency conversion rate represents the frequency change amount per unit time.

6. The method according to claim 5, characterized in that Before controlling the HVAC device to gradually reduce or increase the compressor frequency at a preset frequency conversion rate starting from the current compressor frequency, the method further includes: Determining a target frequency according to the target load and current operating parameters of the HVAC device; The compressor of the HVAC device is controlled to operate according to the target frequency.

7. The method according to claim 6, characterized in that The step of determining the target frequency according to the target load and the current operating parameters of the HVAC device includes: Obtaining the current heat source temperature and the current water temperature of the HVAC device; The target frequency is determined according to the target load, the current heat source temperature, the current water temperature and a preset relationship library, wherein the preset relationship library includes matching relationships among the heat source temperature, load, water temperature and compressor frequency of the HVAC device.

8. The method according to claim 3, characterized in that The adjusting the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load also includes: adjusting the current compressor frequency of the HVAC device within the range corresponding to the target load according to the current load of the HVAC device; The adjusting the current compressor frequency of the HVAC device includes: maintaining the current compressor frequency of the HVAC device unchanged according to the current compressor frequency of the HVAC device being within a preset frequency range; According to the current compressor frequency of the HVAC device being less than the preset frequency range, the compressor frequency of the HVAC device is increased until the compressor frequency is equal to the preset frequency.

9. The method according to claim 1, characterized in that The method further comprises: According to the failure to receive the grid load control signal, the reference load of the HVAC device is determined according to the current heat source temperature, the current water temperature, the preset operating frequency of the compressor and the preset relationship library; The operating state of the HVAC device is controlled according to the reference load.

10. The method according to claim 1, characterized in that The method further comprises: According to the HVAC device satisfying the startup condition, performing the step of adjusting the operating parameters of the HVAC device, the startup condition comprising at least one of the indoor temperature being lower than the set heating temperature value or receiving a startup instruction from the user; and According to the HVAC device satisfying the shutdown condition, the HVAC device is controlled to stop running, wherein the shutdown condition includes that the startup running time of the HVAC device exceeds a preset time.

11. A power grid response control device, characterized in that: The device comprises: A first processing module, configured to determine a target load of the HVAC device in a target period in response to a power grid load control signal, wherein the target period is a period corresponding to the power grid load control signal; A control module is used to adjust the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load so that the current load of the HVAC device is within the range corresponding to the target load, and the operating parameters include the compressor frequency of the HVAC device.

12. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the control method according to any one of claims 1 to 10.

13. A HVAC system, characterized in that: It comprises a HVAC device and a controller, wherein the controller comprises the control device according to claim 11 or the electronic device according to claim 12; The HVAC device includes an electrically connected parameter detection module, a component control module and a signal interaction module; The signal interaction module is used to receive a control signal from a power grid; The parameter detection module is used to detect the operating parameters of the HVAC device, and the operating parameters include one or more of compressor frequency, fan speed and electric auxiliary heating power; The controller is used to determine the target load of the HVAC device in the target period in response to the grid load control signal, and adjust the operating parameters of the HVAC device according to the relationship between the current load of the HVAC device and the target load so that the current load of the HVAC device is within the range corresponding to the target load; The component control module is used to control the operation of each component of the HVAC device according to the adjusted operating parameters.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the steps of the method according to any one of claims 1 to 10.

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