Grid Response Control Method, Device, Electronic Equipment, Heating, Ventilation and Air Conditioning (HVAC) System and Storage Medium of HVAC Device

Abstract

The present invention discloses a method, device, electronic device, heating, ventilation and air conditioning (HVAC) system, and storage medium for grid response control of an HVAC device, relating to the technical field of HVAC control. The method includes: in response to a grid load control signal, determining a target load of the HVAC device in a target period, where the target period is the period corresponding to the grid load control signal; and adjusting an operating parameter of the HVAC device according to a relationship between a current load and the target load of the HVAC device, where the operating parameter includes a compressor frequency of the HVAC device. The technical solution provided by the present invention aims to solve the technical problem that the existing HVAC devices are not flexible enough in responding to the grid load adjustment requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of HVAC control, and particularly to a method, device, electronic device, HVAC system and storage medium for grid response control of an HVAC device. Background Art

[0002] The HVAC device includes a heat pump water heater, which is a device that uses air, groundwater or underground heat energy for hot water supply to meet the heating needs of citizens.

[0003] Currently, the mainstream heat pump water heaters on the market basically operate and control 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 mainly focuses on the needs of users (i.e., maintaining a certain temperature of hot water supply) and does not consider the fluctuations of the grid load. Therefore, it cannot adjust in real time according to the grid load fluctuations. Especially, it cannot actively reduce power consumption during the peak grid load and cannot actively increase operation during the low valley, failing to respond well to the needs of grid load adjustment and not being able to support the peak shaving and valley filling control of the grid system well. Summary of the Invention

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

[0005] To achieve the above object, in a first aspect, the present invention proposes a method for grid response control of an HVAC device, including: responding to a grid load control signal, determining a target load of the HVAC device in a target period, where the target period is the period corresponding to the grid load control signal; adjusting the operating parameters of the HVAC device according to the relationship between the current load and the target load of the HVAC device, 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.

[0006] Preferably, the grid load control signal includes load control parameters. Determining the target load of the HVAC device in the target period includes: determining a reference load of the HVAC device according to preset operating parameters, where the reference load includes one or more of a reference voltage, a reference current, a reference power consumption, and a reference power; determining the target load according to the load control parameters and the reference load.

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

[0008] Preferably, reducing or increasing the operating parameters of the HVAC device when the current load of the HVAC device exceeds the target load range corresponding to the grid load control signal includes: reducing the operating parameters of the HVAC device when the grid load control signal is to control the power consumption load of the HVAC device not to exceed 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 when the grid load control signal is to control the power consumption load of the HVAC device not to be lower than the target load and the current load of the HVAC device is less than the target load.

[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 starting from the current compressor frequency at a preset frequency conversion rate, where the preset frequency conversion rate represents the frequency change amount 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 further includes: determining a target frequency according to the target load and the current operating parameters of the HVAC device; controlling the compressor of the HVAC device to operate at the target frequency.

[0011] Preferably, 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; determining the target frequency according to the target load, the current heat source temperature, the current water temperature, and a preset relationship library, where the preset relationship library includes the matching relationship among 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 and the target load of the HVAC device further includes: adjusting the current compressor frequency of the HVAC device according to the current load of the HVAC device 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 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 the reference 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 in the case that the grid load control signal is not received; controlling the operating state of the HVAC device according to the reference load.

[0014] Preferably, the method further includes: performing the step of adjusting the operating parameters of the HVAC device according to the HVAC device meeting the startup condition, where the startup condition includes at least one of the indoor temperature being lower than the set heating temperature value or receiving a startup instruction from the user; and controlling the HVAC device to stop operating according to the HVAC device meeting the shutdown condition, where the shutdown condition includes the startup operation duration of the HVAC device exceeding a preset duration.

[0015] In a second aspect, the present invention further provides a grid response control device, the device includes: a first processing module, configured to determine the target load of the HVAC device in a target period in response to a grid load control signal, where the target period is the period corresponding to the grid load control signal; a control module, configured to adjust the operating parameters of the HVAC device according to the relationship between the current load and the target load of the HVAC device, 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 provides an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; where 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 according to any one of the first aspect.

[0017] Fourth aspect, the present invention further provides a heating, ventilation and air conditioning (HVAC) system, including an HVAC device and a controller, wherein the controller includes the control device of the second aspect or the electronic device of the third aspect; the HVAC device includes a parameter detection module, a component control module and a signal interaction module which are electrically connected; the signal interaction module is used to receive a control signal from the 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 during 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 and the target load of the HVAC device, 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.

[0018] Fifth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, characterized in that the program is executed by a processor to implement the steps of the method according to any one of the first aspect.

[0019] In the technical solution of the present invention, by providing a method for controlling the response of an HVAC device to the power grid, the working load of a heat pump water heater can be flexibly adjusted according to a power grid load control signal, the target load of the heat pump water heater can be reset according to the power grid load control requirement, and the operating parameters such as the compressor frequency of the HVAC device can be adjusted according to the relationship between the current load and the target load of the HVAC device, so as to adjust the rotation speed of the compressor, and further adjust the overall load of the HVAC device, so that the overall load of the HVAC device corresponds to the target load, and the peak shaving and valley filling of the power grid can be realized, and the peak and valley loads of the power grid can be balanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0021] Figure 1 It is a flowchart of the steps of the method for controlling the response of an HVAC device to the power grid provided by the embodiment of the present invention;

[0022] Figure 2 It is another flowchart of the steps of the method for controlling the response of an HVAC device to the power grid provided by the embodiment of the present invention;

[0023] Figure 3Shows another flowchart of the power grid response control method provided in this embodiment;

[0024] Figure 4 Shows yet another flowchart of the power grid response control method provided in this embodiment;

[0025] Figure 5 Shows a schematic structural diagram of a power grid response control device provided in an embodiment of the present application;

[0026] Figure 6 Shows a schematic structural diagram of a heating, ventilation, and air conditioning (HVAC) system;

[0027] Figure 7 Schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0028] Figure 8 Shows a schematic diagram of a storage medium provided in an embodiment of the present application.

[0029] The realization, functional features, and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0035] 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 most of the current HVAC devices are 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 mainly focuses on the needs of users (i.e., maintaining a certain temperature of hot water supply) and does not consider the fluctuations of the power grid load. Therefore, it cannot adjust in real time according to the fluctuations of the power grid load. In particular, it cannot actively reduce power consumption during the peak load of the power grid, nor can it actively increase operation during the valley period, and fails to respond well to the demand for power grid load adjustment, and cannot well support the peak shaving and valley filling control of the power grid system.

[0036] To solve the above problems, the present invention provides a method for controlling the power grid response of an 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 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, so as to adjust the rotation speed of the compressor, and further adjust the overall load of the HVAC device, so that the overall load of the HVAC device corresponds to the target load, and can achieve power grid peak shaving and valley filling and balance the peak and valley loads of the power grid.

[0037] The embodiments of the present application will be described below.

[0038] As Figure 1 shown in the flowchart of the steps of a method for controlling the power grid response of an HVAC device provided by an embodiment of the present application, the execution subject of the embodiment of the present application can be an electronic device capable of executing the power grid response control method, and the electronic device can include, but is not limited to, a terminal or a server, etc. In this embodiment, the execution subject can be the controller of the heat pump water heater, and the power grid response control method includes:

[0039] S101. Determine the target load of the HVAC device during the target period in response to the grid load control signal.

[0040] In one example, the HVAC device can be electrically connected to the grid through a power line and can also be connected through a communication interface protocol. For example, the HVAC device receives the regulation signal of the grid through the CTA-2045 protocol to realize the communication between the grid and residential equipment for energy management. In this way, it can allow the heat pump water heater to respond to all different types of simulated grid signals in a timely and accurate manner, helping the grid reduce the peak-to-valley difference of the load and ensuring the stable operation of the grid.

[0041] That is to say, the HVAC device can receive the grid load control signal from the grid. Specifically, the receiving method can be network communication, port state change, voltage change, current change, etc., which are ways that can carry information transmission.

[0042] In this embodiment, the grid load control signal is used to determine the target load. The control target of the grid load control signal can be quantified indicators such as power, current, and operation time. Specifically, the grid load control signal includes load control parameters, 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 1000 W, and the load control parameter is 50%. Then the target load is 50% of 1000 W, that is, 500 W. 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, making the application scenarios of the HVAC device wider.

[0043] The target period of this embodiment is the 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. Then the period when the grid communication port state of the water heater is 1 is the target period.

[0044] In another example, when the grid load control signal contains specific operation time, the target period refers to the period corresponding to the operation time. For example, the operation time is from 19:00 to 22:00 every day.

[0045] S102. Adjust the operation parameters of the HVAC device according to the relationship between the current load and the target load of the HVAC device.

[0046] 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. In this way, the HVAC device can respond to the grid load control signal.

[0047] In one example, the operating parameters to be adjusted can be the compressor frequency of the HVAC device, the rotational speed of the fan of the HVAC device, or the operating power of the electric auxiliary heating in the HVAC device, etc., which are parameters affecting the load of the HVAC device.

[0048] Adjusting the load of the HVAC device by adjusting the compressor frequency is applicable to the scenario of variable-frequency water heaters. In this way, the variable-frequency HVAC system can dynamically adjust the working state of the compressor according to the load change, so that the current load of the HVAC device is within the range corresponding to the target load, reduce the peak value of the grid load, improve the grid stability, better adapt to the load change, and can also achieve more precise indoor temperature control and reduce temperature fluctuations.

[0049] The grid response control method of 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, 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, and flexibly adjust the working load of the heat pump water heater, so as to optimize the grid load distribution, improve the energy utilization efficiency, make the overall load of the HVAC device correspond to the target load, realize the peak shaving and valley filling of the grid, balance the peak and valley loads of the grid, and contribute to the stable operation of the grid and the conservation of energy.

[0050] Furthermore, the grid load control signal includes load control parameters. Determining the target load of the HVAC device during the target period includes: determining the reference load of the HVAC device according to the preset operating parameters, where the reference load includes one or more of the reference voltage, reference current, reference power consumption, and reference power; determining the target load according to the load control parameters and the reference load.

[0051] In this embodiment, the preset operating parameters refer to the parameters corresponding to the actual performance of the HVAC device under normal conditions. For example, in the case of no intervention by the grid load control signal, the voltage, current, compressor frequency, etc. when the HVAC device operates normally according to the temperature set by the user.

[0052] The reference load of the HVAC device determined according to the preset operating parameters refers to the rated load or maximum load of the heat pump water heater for the grid determined according to its actual performance. Parameters such as the maximum input power, maximum current, average power, or average current of the heat pump water heater that can represent the power consumption of the heat pump water heater can be used to represent the reference load.

[0053] In this embodiment, the control targets of the power grid load control signal can be quantified indicators such as power, current, and operating time. Correspondingly, the reference load includes one or more of reference voltage, reference current, reference power consumption, and reference power to enable the HVAC device to respond to more control signals and improve the applicable range of the HVAC device in this embodiment.

[0054] 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 power grid load control signal is controlled by the percentage (A%) of the power consumption not exceeding the reference power, then the load control parameter is A%.

[0055] In this embodiment, the target load of the HVAC device is determined according to the product of the load control parameter and the reference load of the HVAC device, and the relationship can be expressed by the formula:

[0056] Formula 1

[0057] In Formula 1: PL is the target load, is the reference load of the HVAC device, is the load control parameter.

[0058] In the above embodiment, the reference load of the HVAC device is first calculated, and on the basis of the reference load, the target load required to respond to the power grid load control signal is calculated, which 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 and can also respond to the power grid demand, and can more precisely control the operating state of the HVAC device.

[0059] Furthermore, according to the relationship between the current load and the target load of the HVAC device, the operating parameters of the HVAC device are adjusted, including: when the current load of the HVAC device is within the target load range corresponding to the power grid load control signal, maintaining the operating parameters of the HVAC device unchanged; when the current load of the HVAC device exceeds the target load range corresponding to the power grid load control signal, reducing or increasing the operating parameters of the HVAC device until the current load of the HVAC device is within the corresponding range of the target load.

[0060] In one example, if the power grid load control signal is to control the power consumption of the HVAC device not to exceed the target load, and taking the compressor frequency as the operating parameter, then, when the current load PL HP is less than or equal to PL , that is PL HP ≤ PL in this case, maintain the existing control and keep the compressor frequency of the HVAC device unchanged.

[0061] In one example, if the grid load control signal is to control the power consumption load of the HVAC device to be not lower than the target load, then, at the current load of the HVAC device PL HP greater than or equal to PL , that is PL HP ≥PL , maintain the existing control and keep the compressor frequency of the HVAC device unchanged.

[0062] 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.

[0063] Specifically, according to the current load of the HVAC device exceeding the target load range corresponding to the grid load control signal, reducing or increasing the operating parameters of the HVAC device includes: when the grid load control signal is to control the power consumption load of the HVAC device to be not 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; when the grid load control signal is to control the power consumption load of the HVAC device to be not lower than the target load and the current load of the HVAC device is less than the target load, reducing the operating parameters of the HVAC device.

[0064] Continuing the above example, if the grid load control signal is to control the power consumption load of the HVAC device to be not higher than the target load, at the current load PL of the HVAC device HP greater than PL, that is PL HP >PL, reduce the compressor frequency of the HVAC device until the current load PL HP is less than or equal to PL.

[0065] If the grid load control signal is to control the power consumption load of the HVAC device to be not lower than the target load, then at the current load PL of the HVAC device HP less than PL, that is PL HP <PL, increase the compressor frequency of the HVAC device until the current load PL HP is greater than or equal to PL.

[0066] This embodiment can flexibly adjust the compressor frequency according to the current load of the HVAC device, with a simple algorithm, and can achieve dynamic adjustment of the power consumption load of the HVAC device within the target time period. Through this adjustment control strategy of the load operating parameters, the HVAC device can flexibly respond to the grid load control signal.

[0067] Specifically, 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 starting from the current compressor frequency at a preset frequency conversion rate, where the preset frequency conversion rate represents the frequency change amount per unit time.

[0068] In one example, the preset frequency conversion rate is, for example, 2Hz / 10S. Then, if reducing the compressor frequency of the HVAC device, control the compressor frequency to decrease at a rate of 2Hz / 10S, and if increasing the compressor frequency of the HVAC device, control the compressor frequency to increase at a rate of 2Hz / 10S.

[0069] This embodiment sets the preset frequency conversion rate so that the compressor frequency gradually decreases or increases according to the frequency change amount per unit time, which can reduce the current impact caused by sudden frequency fluctuations and improve the stability of the power grid.

[0070] 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 further includes: determining a target frequency according to the target load and the current operating parameters of the HVAC device; controlling the compressor of the HVAC device to operate at the target frequency.

[0071] It can be understood that the operating parameters of the HVAC device directly affect its power consumption load. After determining the target load, this embodiment determines the target frequency corresponding to the target load through the target load.

[0072] For example, at the water temperature and ambient temperature corresponding to the current operating parameters, when the power consumption load of the HVAC device is the reference load, the current operating frequency is 60Hz, and the target frequency required for the power consumption load of the HVAC device to be the target load is 50Hz, then directly control the compressor to operate at the target frequency of 50Hz.

[0073] This embodiment can directly control the compressor of the HVAC device to directly change from the current operating frequency to the target frequency for operation, which can quickly respond to the power grid load control signal and improve the power grid signal response efficiency.

[0074] Specifically, 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 current water temperature of the HVAC device; determining the target frequency according to the target load, current heat source temperature, current water temperature, and a preset relationship library, where the preset relationship library includes the matching relationship among the heat source temperature, load, water temperature, and compressor frequency of the HVAC device.

[0075] 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. Here, the heat source temperature refers to the ambient temperature that provides heat 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 pipeline 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 among the ambient temperature of the heat pump water heater, the water temperature in the pipeline of the heat pump water heater, the compressor operating frequency, and the power consumption load. In this embodiment, the relationship among the four is stored in a preset relationship library, and the preset relationship library 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.

[0076] The matching relationship among the heat source temperature, load, water temperature, and compressor frequency of the HVAC device can be expressed by the following formula:

[0077] Formula 2

[0078] In Formula 2: is the power consumption load of the heat pump, Ta is the heat source temperature, Tw is the water temperature, and Fr is the compressor operating frequency. represents the power consumption load of the heat pump corresponding to the determined heat source temperature Ta, water temperature Tw, and compressor operating frequency Fr. .

[0079] That is to say, the compressor operating frequency has the following relationship with the heat source temperature, load, and water temperature: , then when the power consumption load of the heat pump is equal to the target load PL required by the power grid, that is, , the corresponding compressor operating frequency, that is, the target frequency, can be determined.

[0080] The above embodiment can quickly and accurately determine the target frequency based on the target load and the preset relationship library, thereby enabling the HVAC device to quickly respond to the power grid load control signal, improving the power grid response rate, and enhancing the intelligent level of the system.

[0081] In one example, according to the relationship between the current load and the target load of the HVAC device, adjusting the operating parameters of the HVAC device further includes: adjusting the current compressor frequency of the HVAC device according to the current load of the HVAC device 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 the preset compressor frequency range, improving the system stability.

[0082] Among them, 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 within the preset frequency range; increasing the compressor frequency of the HVAC device until the compressor frequency is equal to the preset frequency according to the current compressor frequency of the HVAC device being less than the preset frequency range.

[0083] For example, if the grid load control signal is to control the power consumption load of the HVAC device not to exceed the target load, then 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 greater than or equal to the preset frequency; increase the compressor frequency step by step starting from the current compressor frequency until the current compressor frequency of the HVAC device is equal to the preset frequency 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.

[0084] 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 through 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, improving the system stability.

[0085] Furthermore, the method of this embodiment further includes: determining the reference load of the HVAC device according to the absence of receiving the grid load control signal, the current heat source temperature, the current water temperature, the preset operating frequency of the compressor, and the preset relationship library; controlling the operating state of the HVAC device according to the reference load.

[0086] When the heat pump water heater does not receive the grid load control signal, it indicates that the heat pump water heater operates according to the reference load. At this time, the reference load corresponding to the current performance of the heat pump water heater can be found in the preset relationship library according to 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 is controlled according to the reference load.

[0087] That is to say, when the heat pump water heater does not receive the grid load control signal, it operates normally according to the reference 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 consumption load of the HVAC device can be flexibly adjusted according to the actual power usage situation and the grid condition to adapt to different operating conditions.

[0088] Further, the method of this embodiment further includes: performing the step of adjusting the operating parameters of the HVAC device according to the HVAC device meeting the startup condition; and controlling the HVAC device to stop operating according to the HVAC device meeting the shutdown condition, where the shutdown condition includes that the startup operation duration of the HVAC device exceeds a preset duration.

[0089] In one example, after obtaining the grid load control signal, it is possible to detect whether the HVAC device is in the startup state. If it is in the startup state, the method shown in steps S101 to S102 above is executed. If it is not in the startup state, it is continuously detected whether the HVAC device meets the startup condition.

[0090] For example, the startup condition can be that the indoor temperature is lower than the set heating temperature value, that a startup instruction from the user is received, that the set startup time is reached, etc.

[0091] In one example, after the HVAC device adjusts its power consumption to be within the target load range in response to the grid load control signal, it also continuously detects whether the HVAC device meets the shutdown condition. When the shutdown condition is met, the HVAC device is controlled to stop operating to save energy consumption.

[0092] In one example, the shutdown condition can be that the startup operation duration of the HVAC device exceeds the preset time limit, that the indoor temperature reaches the set comfortable temperature, that a device failure occurs, that the total energy consumption within a set time period exceeds the preset energy consumption, etc.

[0093] In the above embodiment, when the device meets the startup condition or the shutdown condition, the startup and shutdown of the HVAC device can be accurately controlled in a timely manner, which can avoid unnecessary energy waste and can significantly reduce energy consumption. Avoiding the device from running pointlessly for a long time or running under unsuitable conditions can reduce the wear of the device and extend its service life.

[0094] The above embodiment will be described below with a specific example. Figure 2 Another step flowchart showing a grid response control method provided by an embodiment of the present application is as Figure 2 shown:

[0095] In one example, the load control parameter of the grid load is percentage control. For example, the reference load of a 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, according to the control method of the present invention:

[0096] S1: Receive the grid load control signal.

[0097] The heat pump water heater detects that the grid load control takes effect through the grid signal port state, and the control target is a power input not exceeding 50% (load control parameter).

[0098] S2: Determine the target load according to the grid load control signal.

[0099] The heat pump water heater determines the target load according to the grid load control signal and the reference load transmitted from the grid, where the target load .

[0100] Assume that the grid load control signal is to control the power consumption load of the HVAC device not to be higher than the target load, that is, to control the power consumption load of the HVAC device not to exceed .

[0101] S3: Adjust the operation control strategy of the HVAC device according to the current load and the target load of the HVAC device.

[0102] In this embodiment, for different grid load control signals and different current loads, there are different operation control strategies, specifically as Figure 3 and Figure 4 shown in the steps.

[0103] S4: Detect whether the grid load control signal is cancelled / terminated.

[0104] When it is detected that the grid load control signal is cancelled, restore the control method before the grid load control signal becomes effective.

[0105] S5: When it is detected that the grid load control signal is cancelled / terminated, exit the grid response control and control the HVAC device according to the reference load.

[0106] As Figure 3 shown, Figure 3 shows another step flow chart of the grid response control method provided by this embodiment.

[0107] By detecting whether the unit of the HVAC device is in the startup state, if it is in the startup state, then adjust the operation control strategy of the HVAC device according to the current load and the target load of the HVAC device, if it is not in the startup state, then continuously detect whether the HVAC device meets the startup conditions.

[0108] When the unit is powered on, detect 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 continuously 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, detect 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, keep 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.

[0109] At the same time, it also detects whether the HVAC device meets the shutdown conditions. When the shutdown conditions are met, control the HVAC device to stop running. Among them, the shutdown conditions include that the startup running duration of the HVAC device exceeds the preset duration, that is, when the preset maximum heating time is reached, control the HVAC device to stop running.

[0110] This embodiment can quickly respond to the grid load control signal, flexibly adjust the compressor frequency according to the current load of the HVAC device, has a simple algorithm, and can achieve dynamic adjustment of the power consumption load of the HVAC device within the target period. Through this adjustment control strategy of the load operation parameters, the HVAC device can flexibly respond to the grid load control signal.

[0111] As Figure 4 shown, Figure 4 Fig. shows another step flowchart of the grid response control method provided by this embodiment.

[0112] Figure 4 Differing from Figure 3 , when it is detected that the current power P of the unit is greater than the control target of 500W, that is, P > 500W, determine the target frequency according to the target load and the current operating parameters of the HVAC device, and control the compressor of the HVAC device to operate at the target frequency. For example, if the target load is 1, the target frequency can be obtained according to the relationship between the compressor operating frequency and the heat source temperature, load, and water temperature . For example, if it is 50Hz, then when the current compressor frequency > , directly adjust to , which can quickly respond to the grid load control demand, and then continuously detect whether the current power of the unit is greater than the control target of 500W.

[0113] In this embodiment, the compressor of the HVAC device can be directly controlled to change from the current operating frequency to the target frequency, which can quickly respond to the grid load control signal and improve the grid signal response efficiency.

[0114] The grid response control method of 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, so as to adjust the rotational speed of the compressor, and further adjust the overall load of the HVAC device, so that the overall load of the HVAC device corresponds to the target load, and the peak shaving and valley filling of the grid can be realized, and the peak and valley loads of the grid can be balanced.

[0115] Figure 5 The structure diagram of a grid response control device provided by an embodiment of the present application is shown, as Figure 5 shown, the grid response control device 300 includes:

[0116] The first processing module 301 is configured to determine the target load of the HVAC device in the target period in response to the grid load control signal, where the target period is the period corresponding to the grid load control signal;

[0117] The control module 302 is configured to adjust the operating parameters of the HVAC device according to the relationship between the current load and the target load of the HVAC device, 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.

[0118] The grid response control device provided by the above embodiment of the present application and the grid response control method provided by 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.

[0119] This embodiment provides a HVAC system, Figure 6 The structure diagram of a HVAC system is shown, referring to Figure 6 , the HVAC system 600 includes a HVAC device 602 and a controller 601, and the controller 601 includes the control device or electronic device of the above embodiment. In one example, the HVAC device of this embodiment is a heat pump water heater.

[0120] Further, the HVAC device 601 includes a parameter detection module 603, a component control module 604, and a signal interaction module 605 that are electrically connected; the signal interaction module 605 is configured to receive a control signal from the power grid; the parameter detection module 603 is configured 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 heating power; the controller 602 is configured to determine the target load of the HVAC device during the target period in response to the power grid load control signal, and adjust the operating parameters of the HVAC device according to the relationship between the current load and the target load of the HVAC device, so that the current load of the HVAC device is within the range corresponding to the target load; the component control module 604 is configured to control the operation of each component of the HVAC device according to the adjusted operating parameters.

[0121] The HVAC system provided in the above 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.

[0122] This embodiment provides an electronic device, including: 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 to enable the at least one processor to execute the above-mentioned power grid response control method.

[0123] Figure 7 The structural schematic diagram of an electronic device provided in an embodiment of the present application is shown, as Figure 7 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 through the bus 202; a computer program that can run on the processor 200 is stored in the memory 201, and when the processor 200 runs the computer program, it executes the method provided in any of the foregoing embodiments of the present application.

[0124] Among them, the memory 201 may include a high-speed random access memory (RAM: Random Access Memory), and may also include a non-volatile memory, such as at least one disk memory. Through at least one communication interface 203 (which can be wired or wireless), the communication connection between this system network element and at least one other network element can be realized, and the Internet, wide area network, local area network, metropolitan area network, etc. can be used.

[0125] The bus 202 can be an ISA bus, a PCI bus, an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. Among them, the memory 201 is used to store programs. After receiving an execution instruction, the processor 200 executes the program. Any implementation manner of the grid response control method of the HVAC device disclosed in any implementation manner of the embodiments of the present application can be applied to or implemented by the processor 200.

[0126] 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 integrated logic circuit in the hardware of the processor 200 or the instructions in the form of software. The above-mentioned processor 200 can be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. 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 combination with the embodiments of the present application can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the art 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. This storage medium is located in the memory 201, and the processor 200 reads the information in the memory 201 and combines its hardware to complete the steps of the above method.

[0127] The electronic device provided in the above embodiments of the present application and the grid response control method provided in the embodiments of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0128] The embodiments of the present application also provide a computer-readable storage medium corresponding to the grid response control method of the HVAC device provided in the foregoing embodiments. Please refer to Figure 8 which shows a computer-readable storage medium 30. The computer-readable storage medium 30 can be an optical disc, on which a program product is stored. The program product can be an operating system, an application software, a game, a tool software, etc. The program product includes a computer program, and the computer program usually exists in the form of source code or compiled binary. When the computer program is run by a processor, it will execute the grid response control method provided in any of the foregoing embodiments.

[0129] 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 and magnetic storage media, which will not be elaborated here one by one.

[0130] The computer-readable storage medium provided by the above embodiments of the present application and the grid response control method of the HVAC device provided by the embodiments of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run, or implemented by the application programs stored therein.

[0131] In the above text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be noted that the scope of the methods and devices in the embodiments 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 a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0132] Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions for causing a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present application.

[0133] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is 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, adjusting the operating parameters of the HVAC device so that the current load of the HVAC device is within the range corresponding to the target load, the operating parameters including the compressor frequency of the HVAC device; The method further includes: according to the current load of the HVAC device being within the range corresponding to the target load and the current compressor frequency of the HVAC device being less than a preset frequency range, increasing the compressor frequency of the HVAC device until the compressor frequency is equal to the preset frequency; 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 according to the current load of the HVAC device being within the target load range corresponding to the power grid load control signal; reducing or increasing the operating parameters 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, until the current load of the HVAC device is within the range corresponding to the target load; The lowering or increasing the operating parameters of the HVAC device includes: controlling the HVAC device to gradually lower 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; 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 further includes: determining a target frequency according to the target load and the current operating parameters of the HVAC device; controlling the compressor of the HVAC device to operate at the target frequency; 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.

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 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 as to improve the operating parameters of the HVAC device.

4. 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 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.

5. 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.

6. 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.

7. 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, configured 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; and further configured to increase the compressor frequency of the HVAC device until the compressor frequency is equal to the preset frequency according to the current load of the HVAC device being within the range corresponding to the target load and the current compressor frequency of the HVAC device being less than a preset frequency range; The control module is further used to maintain the operating parameters of the HVAC device unchanged according to the current load of the HVAC device within the target load range corresponding to the power grid load control signal; reduce or increase the operating parameters 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, until the current load of the HVAC device is within the range corresponding to the target load; the reducing or increasing the operating parameters of the HVAC device includes: controlling the HVAC device to gradually reduce or increase the compressor frequency starting from the current compressor frequency according to a preset frequency conversion rate, wherein the preset frequency conversion rate represents the frequency change amount per unit time; Before 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, the control module is also used to obtain the current heat source temperature and the current water temperature of the HVAC device; determine 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; and control the compressor of the HVAC device to operate according to the target frequency.

8. 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 6.

9. A HVAC system, characterized in that: It comprises a HVAC device and a controller, wherein the controller comprises the control device according to claim 7 or the electronic device according to claim 8; 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 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; and to increase the compressor frequency of the HVAC device until the compressor frequency is equal to the preset frequency according to the current load of the HVAC device being within the range corresponding to the target load and the current compressor frequency of the HVAC device being less than a preset frequency range; and to maintain 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, reducing or increasing the operating parameters of the HVAC device until the current load of the HVAC device is within the range corresponding to the target load; The lowering or increasing the operating parameters of the HVAC device includes: controlling the HVAC device to gradually lower 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; 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 control module is further used to obtain the current heat source temperature and the current water temperature of the HVAC device; determine 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; and control the compressor of the HVAC device to operate according to the target frequency; The component control module is used to control the operation of each component of the HVAC device according to the adjusted operating parameters.

10. 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 6.

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