Grid response control method, device, electronic equipment, HVAC system and storage medium for HVAC device

Abstract

The present invention discloses a grid response control method, device, electronic device, HVAC system and storage medium for a HVAC device, and relates to the field of HVAC control technology. The control method includes: determining a target shutdown temperature of the HVAC device in a target time period in response to a grid load control signal, the grid load control signal is used to determine the target load, the target shutdown temperature represents the corresponding water temperature when the HVAC device reaches the target load, and the target time period is the time period corresponding to the grid load control signal; determining a target startup temperature of the HVAC device in the target time period according to the target shutdown temperature; and controlling the operating state of the HVAC device in the target time period according to the target shutdown temperature and the target startup temperature. The technical solution provided by the present invention aims to solve the technical problem that the existing fixed-speed heat pump water heater cannot adjust the grid load.

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] Since constant-speed compressors are stable and highly reliable, heat pump water heaters in HVAC devices currently basically use constant-speed compressors. However, when the power grid system is in short supply, heat pump water heaters using constant-speed compressors cannot adjust the power consumption load of the heat pump system by adjusting the compressor speed. As a result, during peak hours of grid load, the operation of the HVAC device may increase the burden on the grid and fail to achieve peak-shaving and valley-filling control of the grid load. 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 fixed-speed heat pump water heater cannot adjust the grid load.

[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 shutdown temperature of the HVAC device in a target time period in response to a grid load control signal, the grid load control signal being used to determine the target load, the target shutdown temperature representing the corresponding water temperature when the HVAC device reaches the target load, and the target time period being the time period corresponding to the grid load control signal; determining a target startup temperature of the HVAC device in the target time period according to the target shutdown temperature; and controlling the operating state of the HVAC device in the target time period according to the target shutdown temperature and the target startup temperature.

[0006] Preferably, the grid load control signal includes a load control parameter, and the target shutdown temperature of the HVAC device in a target time period is determined in response to the grid load control signal, including: determining the target load according to the load control parameter and a benchmark load of the HVAC device; obtaining the current heat source temperature of the HVAC device; determining the target shutdown temperature according to the current heat source temperature, the target load and a preset relationship library, wherein the preset relationship library includes a matching relationship between the heat source temperature, load and water temperature of the HVAC device.

[0007] Preferably, the target shutdown temperature is determined based on the current heat source temperature, the target load and a preset relationship library, including: searching the preset relationship library for a first shutdown temperature corresponding to the current heat source temperature and the benchmark load; searching the preset relationship library for a second shutdown temperature corresponding to the current heat source temperature and the target load; and taking the minimum value of the first shutdown temperature and the second shutdown temperature as the target shutdown temperature.

[0008] Preferably, the method further comprises: acquiring a user set temperature as a third shutdown temperature; and taking a minimum value among the first shutdown temperature, the second shutdown temperature and the third shutdown temperature as the target shutdown temperature.

[0009] Preferably, determining the target startup temperature of the HVAC device in the target time period according to the target shutdown temperature includes: obtaining a preset startup hysteresis of the HVAC device; obtaining the target startup temperature according to the target shutdown temperature and the preset startup hysteresis, the target startup temperature being lower than the target shutdown temperature.

[0010] Preferably, the operating state of the HVAC device in the target time period is controlled according to the target shutdown temperature and the target startup temperature, including: controlling the HVAC device to be in a working state according to the current water temperature of the HVAC device being less than the target shutdown temperature and greater than or equal to the target startup temperature; controlling the HVAC device to be in a shutdown state according to the current water temperature of the HVAC device being greater than or equal to the target shutdown temperature.

[0011] Preferably, controlling the operating state of the HVAC device during the target time period according to the target shutdown temperature and the target startup temperature also includes: maintaining the current operating state of the HVAC device according to the current water temperature being less than the target startup temperature; or controlling the HVAC device to be in a working state in response to a heating instruction according to the current water temperature being less than the target startup temperature.

[0012] Preferably, the method also includes: based on the failure to receive the grid load control signal, searching a preset relationship library for a first shutdown temperature corresponding to the current heat source temperature and the benchmark load of the HVAC device; obtaining the user set temperature, and determining the target shutdown temperature based on the minimum value of the first shutdown temperature and the user set temperature.

[0013] Preferably, the method further comprises: controlling the HVAC device to be in a shutdown state according to the current load of the HVAC device exceeding the target load; the target load comprises one or more of a target voltage, a target current, a target power and a target power.

[0014] In a second aspect, the present invention further proposes a power grid response control device, the device comprising: a first processing module, for determining a target shutdown temperature of the HVAC device in a target time period in response to a power grid load control signal, the power grid load control signal being used to determine the target load, the target shutdown temperature representing the corresponding water temperature when the HVAC device reaches the target load, and the target time period being the time period corresponding to the power grid load control signal; a second processing module, for determining a target startup temperature of the HVAC device in the target time period based on the target shutdown temperature, the target startup temperature being lower than the target shutdown temperature; and a control module, for controlling the operating state of the HVAC device in the target time period based on the target shutdown temperature and the target startup temperature.

[0015] 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.

[0016] In a fourth aspect, the present invention further proposes a HVAC system, comprising a HVAC device and the control device described in the second aspect or the electronic device described in the third aspect.

[0017] Preferably, the HVAC device includes a heat pump water heater and a heat source system connected to the heat pump water heater; the heat source system is used to provide a heat source for the heat pump water heater; and the heat pump water heater is used to use the heat source to increase the water temperature in the water heater pipeline.

[0018] 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.

[0019] 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 maximum forced shutdown water temperature of the heat pump water heater can be reset according to the grid load control demand, so that the actual load of the heat pump water heater is controlled within the target range, corresponding to the grid load control demand. And the new startup water temperature can be determined according to the new forced shutdown water temperature, thereby realizing the flexible control of the start and stop of the heat pump water heater under different grid load control signals and different heat source temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] 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;

[0022] 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;

[0023] Figure 3 A schematic diagram of the structure of a power grid response control device provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application;

[0025] Figure 5 A schematic diagram of a storage medium provided in an embodiment of the present application is shown.

[0026] 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

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] A heat pump water heater is a device based on heat pump technology that converts low-temperature heat sources into high-temperature heat sources through a compressor. Since most of the compressors in current HVAC devices are fixed-speed compressors, the heat pump water heater cannot adjust the power consumption load of the heat pump system by adjusting the compressor speed. As a result, during peak hours of grid load, the operation of the HVAC device may increase the burden on the grid and fail to achieve peak shaving and valley filling control of the grid load.

[0033] In order to solve the above problems, the present invention provides a grid response control method for a HVAC device, which can flexibly adjust the working load of the heat pump water heater according to the grid load control signal, reset the maximum forced shutdown water temperature of the heat pump water heater according to the grid load control demand, and control the actual load of the heat pump water heater within the target range, corresponding to the grid load control demand. And the new startup water temperature can be determined according to the new forced shutdown water temperature, thereby realizing the flexible control of the start and stop of the heat pump water heater under different grid load control signals and different heat source temperatures.

[0034] The following is a description of the embodiments of the present application.

[0035] like Figure 1The 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:

[0036] S101 . Determine a target shutdown temperature of a HVAC device in a target period in response to a power grid load control signal.

[0037] 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.

[0038] 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.

[0039] 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 1000W, that is, 500W.

[0040] Before receiving the grid load control signal, the operating load and shutdown temperature of the HVAC device are determined based on the current heat source temperature and its own operating parameters. After receiving the grid load control signal, in order to make the output power of the HVAC device meet the grid load requirements, it is necessary to redetermine the target shutdown temperature based on the target load. The target shutdown temperature represents the corresponding water temperature when the HVAC device reaches the target load. That is to say, when the water temperature of the HVAC device reaches the target shutdown temperature, the load of the HVAC device has reached the target load, and the heat pump water heater can be controlled to stop working.

[0041] 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.

[0042] 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.

[0043] S102: Determine a target startup temperature of the HVAC device in a target period of time according to the target shutdown temperature.

[0044] After obtaining the target shutdown temperature in the above steps, in order to realize automatic start and shutdown control of the heat pump water heater, the target start-up temperature of the HVAC device in the target period is determined according to the target shutdown temperature, so that when the water temperature is lower than the target start-up temperature, the heat pump water heater can be started to ensure that the indoor temperature is comfortable.

[0045] S103, controlling the operating state of the HVAC device in the target time period according to the target shutdown temperature and the target startup temperature.

[0046] In this embodiment, the target startup temperature is lower than the target shutdown temperature. Taking the fully automatic control of the heat pump water heater as an example, when the water temperature of the heat pump water heater is lower than the target startup temperature, the heat pump water heater starts; when the water temperature of the heat pump water heater is higher than the target shutdown temperature, the heat pump water heater stops running.

[0047] The grid response control method for the HVAC device provided in this embodiment can respond to the grid load control signal. It does not need to change the compressor speed of the heat pump controller, so as to optimize the grid load distribution and improve the energy utilization efficiency. It can redetermine the target shutdown temperature and target startup temperature based on the grid load control signal, and realize dynamic adjustment of the operating state of the HVAC device, which helps to achieve stable operation of the grid and energy conservation.

[0048] Furthermore, the grid load control signal includes a load control parameter, and in response to the grid load control signal, a target shutdown temperature of the HVAC device in a target time period is determined, including: determining the target load based on the load control parameter and a baseline load of the HVAC device; obtaining the current heat source temperature of the HVAC device; determining the target shutdown temperature based on the current heat source temperature, the target load and a preset relationship library, wherein the preset relationship library includes a matching relationship between the heat source temperature, the load and the water temperature of the HVAC device.

[0049] In this embodiment, the benchmark load of the HVAC device 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 parameters of the power consumption of the heat pump water heater.

[0050] The target load is determined by multiplying the load control parameter by the base load of the HVAC device, which can be expressed as follows:

[0051] Formula 1

[0052] In formula 1: PL is the target load, is the base load of the HVAC equipment, is the load control parameter.

[0053] In one example, the current heat source temperature of the HVAC device can be obtained by setting a temperature sensor in the heat source system. 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 heat pump water heater pipeline and the workload. In this embodiment, the relationship between the three is stored in a preset relationship library, which can be a relationship table. Then, the water temperature corresponding to the current heat source temperature and the target load can be obtained by looking up the table, that is, the maximum shutdown temperature. After obtaining the maximum shutdown temperature, the maximum shutdown temperature can be used as the target shutdown temperature. The target shutdown temperature can also be determined according to the temperature set by the user or other temperature parameters.

[0054] The matching relationship between the heat source temperature, load and water temperature of the HVAC device can be expressed by the following formula:

[0055] Formula 2

[0056] In formula 2: is the heat pump load, Ta is the heat source temperature, Tw is the water temperature, Indicates the heat source temperature Ta and heat pump load When determined, the corresponding water temperature Tw.

[0057] When the heat pump load ( ) is equal to the target load (PL) required by the power grid, then the corresponding water temperature (Tw) can be determined to be the maximum shutdown temperature (Twstopmax), which can be expressed as:

[0058] Formula 3

[0059] In formula 3: PL is the target load of the power grid, Ta is the heat source temperature, and Twstopmax is the maximum shutdown temperature.

[0060] In an example, the preset relationship library may be shown in Table 1 below:

[0061] Table 1:

[0062]

[0063] Assuming that the target load is 50% of the base load and the heat source temperature is 44°C, the corresponding target shutdown temperature is 50°C according to Table 1.

[0064] The above-mentioned embodiment can realize fast and accurate determination of the maximum shutdown temperature that can be set for the HVAC device based on the current target load based on load control parameters and a preset relationship library. The maximum shutdown temperature is used to determine the target shutdown temperature, which can not only improve energy efficiency and reduce costs, but also enhance the intelligence level of the system.

[0065] Furthermore, the target shutdown temperature is determined according to the current heat source temperature, the target load and the preset relationship library, including: searching the preset relationship library for a first shutdown temperature corresponding to the current heat source temperature and the reference load; searching the preset relationship library for a second shutdown temperature corresponding to the current heat source temperature and the target load; and taking the minimum value of the first shutdown temperature and the second shutdown temperature as the target shutdown temperature.

[0066] In one example, the current heat source temperature is 44°C, and the benchmark load is the normal working load when the heat pump water heater does not receive the grid load control signal. The proportion interval is (95%, +∞), and according to Table 1, the corresponding first shutdown temperature is 65°C.

[0067] Assuming the target load is 50% of the base load, the corresponding The ratio interval is (45%, 55%], and according to Table 1, the corresponding second shutdown temperature is 50°C.

[0068] The minimum value between the first shutdown temperature and the second shutdown temperature is used as the target shutdown temperature, that is, the target shutdown temperature is 50°C.

[0069] The above embodiment can flexibly adjust the shutdown temperature according to different current heat source temperatures and different target load conditions to adapt to different grid requirements. Selecting a lower temperature as the target shutdown temperature can further reduce the operating power of the heat pump water heater and reduce the burden on the grid.

[0070] In an embodiment of the present application, the method further includes: obtaining a user set temperature as a third shutdown temperature; and taking the minimum value among the first shutdown temperature, the second shutdown temperature and the third shutdown temperature as the target shutdown temperature.

[0071] That is, according to the user-set water temperature, the maximum water temperature limit that the heat pump can reach at the current heat source temperature, and the maximum shutdown water temperature corresponding to the target load, the minimum value is taken as the new shutdown water temperature of the heat pump water heater during grid load control. The calculation rule is expressed as follows:

[0072] Formula 4

[0073] In formula 4, Twstop is the shutdown water temperature (target shutdown temperature), Ts is the shutdown water temperature set by the user, and Twmax is the maximum water temperature limit that the heat pump can reach under the current ambient temperature (determined according to the characteristics of the heat pump system). is the maximum shutdown temperature corresponding to the target load.

[0074] This embodiment takes user needs into consideration and adds the user-set temperature condition into the process of determining the target shutdown temperature, which can improve user experience and satisfaction.

[0075] In an embodiment of the present application, a target startup temperature of the HVAC device in a target period is determined according to a target shutdown temperature, including: obtaining a preset startup hysteresis of the HVAC device; and obtaining a target startup temperature according to the target shutdown temperature and the preset startup hysteresis.

[0076] In this embodiment, the preset start-up hysteresis refers to the temperature range for turning the HVAC on and off. The preset start-up hysteresis can be set according to the performance of the heat source equipment, the capacity of the indoor terminal equipment and the energy-saving standard. It is pre-set and stored. After obtaining the target shutdown temperature, this embodiment can obtain the target start-up temperature based on the difference between the target shutdown temperature and the preset hysteresis.

[0077] Right now: Formula 5

[0078] In formula 5: Twstart is the startup water temperature, Treset is the preset startup hysteresis, is the shutdown water temperature (target shutdown temperature). Among them, the target startup temperature is lower than the target shutdown temperature.

[0079] Continuing with the above example, is 50℃, assuming Treset is 5℃, then is 45℃.

[0080] By setting a preset startup hysteresis and determining the target startup temperature accordingly, it is possible to improve energy efficiency and reduce costs while ensuring indoor comfort, and it is also convenient to control the start-up of the heat pump water heater according to the target startup temperature.

[0081] In an embodiment of the present application, the operating state of the HVAC device in the target time period is controlled according to the target shutdown temperature and the target startup temperature, including: controlling the HVAC device to be in a working state according to the current water temperature of the HVAC device being less than the target shutdown temperature and greater than or equal to the target startup temperature; controlling the HVAC device to be in a shutdown state according to the current water temperature of the HVAC device being greater than or equal to the target shutdown temperature.

[0082] Continuing with the above example, during the target period, the heat pump water heater collects the water temperature Tw in real time. When Tw does not reach 50°C, the heat pump water heater of the HVAC device is controlled to be in working state, and the water temperature in the pipeline is increased until the water temperature is greater than or equal to 50°C.

[0083] In one example, the user can set the working mode of the water heater to automatic mode, that is, when the temperature is lower than the target startup temperature, it automatically starts, and when the temperature is greater than or equal to the target shutdown temperature, it automatically stops.

[0084] That is to say, when 45℃≤Tw<50℃, the HVAC device is controlled to be in working state, and when 50℃≤Tw, the HVAC device is controlled to be in shutdown state.

[0085] In this way, the HVAC equipment can provide normal hot water or heating, providing convenience for users, and can also meet the grid load requirements, ensuring indoor comfort while improving energy efficiency.

[0086] In an embodiment of the present application, the operating state of the HVAC device in the target time period is controlled according to the target shutdown temperature and the target startup temperature, and also includes: maintaining the current operating state of the HVAC device according to the current water temperature being less than the target startup temperature; or controlling the HVAC device to be in a working state in response to a heating instruction according to the current water temperature being less than the target startup temperature.

[0087] Continuing with the above example, when 50℃≤Tw, the HVAC device is in a shutdown state. As time goes by, the water temperature will drop. When Tw drops to 45℃, if there is no need to start the device, the HVAC device will remain in the current shutdown state.

[0088] When there is a need to start up, that is, when there is a temperature increase instruction, the HVAC device is controlled to be in working state, thereby increasing the water temperature in the heat pump water heater.

[0089] In one example, the temperature increase instruction may be when the heat pump water heater is in automatic adjustment mode and Tw < 45° C., which automatically triggers the issuance of the temperature increase instruction, or it may be a received user adjustment demand.

[0090] This embodiment can realize that the heat pump water heater is turned on only when needed, thereby reducing unnecessary energy consumption and improving energy utilization efficiency.

[0091] The method of the embodiment of the present application also includes: based on the failure to receive the grid load control signal, searching the preset relationship library for a first shutdown temperature corresponding to the current heat source temperature and the benchmark load of the HVAC device; obtaining the user set temperature, and determining the target shutdown temperature based on the minimum value of the first shutdown temperature and the user set temperature.

[0092] 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 first shutdown temperature corresponding to the current heat source temperature can be obtained according to the current heat source temperature, the benchmark load of the HVAC device and the preset relationship library (Table 1 above). Continuing with the above example, the current heat source temperature is 44°C, and the benchmark load is the normal working load when the heat pump water heater does not receive the grid load control signal. The proportion interval is (95%, +∞), and according to Table 1, the corresponding first shutdown temperature is 65°C.

[0093] If the user set temperature is 70°C, the target shutdown temperature is determined based on the minimum value of the first shutdown temperature and the user set temperature, that is:

[0094] Target shutdown water temperature

[0095] Start water temperature

[0096] That is to say, when no grid load control signal is received, the shutdown water temperature of the heat pump water heater is , the startup water temperature is When the water temperature Tw≥65℃, the heat pump water heater shuts down; when the water temperature Tw<60℃ in the shutdown state, the heat pump water heater will start if there is a need to start, and maintain the status quo if there is no need to start.

[0097] The above-mentioned embodiment can realize the control of the heat pump water heater when no grid load control signal is received, which helps to improve the efficiency, reliability and user satisfaction of the HVAC system.

[0098] In an embodiment of the present application, the above method also includes: controlling the HVAC device to be in a shutdown state based on the current load of the HVAC device exceeding the target load; the target load includes one or more of target voltage, target current, target power and target power.

[0099] This embodiment can improve the control flexibility of the HVAC device by setting multiple target load parameters, avoid equipment overload due to excessive load, and extend the service life of the equipment.

[0100] For example, the power of the HVAC device within a preset time period is obtained. When the power exceeds the preset target power, it indicates that the power of the heat pump water heater is too large and continued heating may affect the normal operation of the power grid. In this case, the heat pump water heater of the HVAC device is controlled to shut down. This can avoid using too much electricity during peak electricity price periods, thereby reducing energy costs. The target load can be flexibly adjusted according to the actual power usage and power grid conditions to adapt to different operating conditions.

[0101] 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:

[0102] 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 target is 50%, and the current ambient temperature (heat source temperature) is 44°C, then the control method according to the present invention is:

[0103] S1: Receive the grid load control signal.

[0104] 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).

[0105] S2: Determine the target shutdown temperature corresponding to the target load according to the grid load control signal.

[0106] The heat pump water heater determines the shutdown water temperature corresponding to the load according to the target load transmitted by the power grid. The shutdown water temperature is determined as follows:

[0107] According to the actual performance of the heat pump water heater, its benchmark load for the power grid is determined as PL0=1000 (W);

[0108] Determine the target load based on the load control parameters ;

[0109] Determine the water temperature based on the actual performance of the heat pump water heater, the heat pump power consumption and the ambient temperature To facilitate software calculation and reading, the relationship is output as a corresponding table for standby use, such as Table 1 in the above embodiment.

[0110] Determine the maximum shutdown water temperature required by the current heat source temperature and the current grid target load through Table 1 =50 (℃);

[0111] Determine the maximum water temperature limit corresponding to the current heat source temperature and benchmark load through Table 1 is 65℃.

[0112] Calculate the target shutdown water temperature based on the user-set water temperature (e.g. 70°C), the maximum shutdown water temperature of 50°C determined by the grid load, and the maximum water temperature limit of 65°C determined by the current operating parameters. .

[0113] S3: Determine the target startup temperature according to the target shutdown temperature.

[0114] According to the newly determined shutdown water temperature The corresponding startup water temperature is determined by the preset startup differential (e.g. 5°C) .

[0115] S4: Control the start and stop of the heat pump water heater according to the newly determined target shutdown temperature and startup temperature.

[0116] When the heat pump water heater is in operation, when the water temperature Tw≥50℃, the heat pump water heater will shut down;

[0117] When the heat pump water heater is in shutdown state, when the water temperature Tw is less than 45°C, the heat pump water heater will be turned on if there is a need to turn it on, and will maintain the status quo if there is no need to turn it on.

[0118] S5: 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.

[0119] If the grid load control signal is canceled / terminated, that is, the heat pump water heater receives or detects the grid load control cancellation or termination signal, the shutdown water temperature and startup water temperature settings before the grid load control signal takes effect are restored, that is, the maximum shutdown water temperature Twstopmax calculation calculated according to the grid target load is canceled, and the start and stop control of the heat pump water heater is performed in the state without the grid control signal:

[0120] Shutdown water temperature

[0121] Start water temperature

[0122] That is, when the heat pump water heater is in operation, when the water temperature Tw≥65℃, the heat pump water heater will shut down; when the water temperature Tw<60℃ in the shutdown state, the heat pump water heater will start if there is a need to start, and maintain the status quo if there is no need to start.

[0123] 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 maximum forced shutdown water temperature of the heat pump water heater according to the grid load control demand, and control the actual load of the heat pump water heater within the target range, corresponding to the grid load control demand. And the new startup water temperature can be determined according to the new forced shutdown water temperature, thereby realizing the flexible control of the start and stop of the heat pump water heater under different grid load control signals and different heat source temperatures.

[0124] Figure 3 A schematic diagram of the structure of a power grid response control device provided in an embodiment of the present application is shown. Figure 3 As shown, the power grid response control device 300 includes:

[0125] The first processing module 301 is used to determine the target shutdown temperature of the HVAC device in the target time period in response to the grid load control signal, the grid load control signal is used to determine the target load, the target shutdown temperature represents the corresponding water temperature when the HVAC device reaches the target load, and the target time period is the time period corresponding to the grid load control signal;

[0126] A second processing module 302 is used to determine a target startup temperature of the HVAC device in the target period according to the target shutdown temperature, wherein the target startup temperature is lower than the target shutdown temperature;

[0127] The control module 303 is used to control the operating state of the HVAC device in the target time period according to the target shutdown temperature and the target startup temperature.

[0128] 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.

[0129] 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.

[0130] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown. Figure 4As 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] This embodiment provides a HVAC system, characterized in that it includes a HVAC device and the above-mentioned grid response control device or electronic equipment.

[0136] Among them, the HVAC device includes a heat pump water heater and a heat source system connected to the heat pump water heater; the heat source system is used to provide a heat source for the heat pump water heater; the heat pump water heater is used to use the heat source to increase the water temperature in the water heater pipeline.

[0137] 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.

[0138] 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 5, 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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 a power grid load control signal, determining a target shutdown temperature of the HVAC device in a target period, the power grid load control signal being used to determine the target load, the target shutdown temperature representing a corresponding water temperature when the HVAC device reaches the target load, and the target period being a period corresponding to the power grid load control signal; Determining a target startup temperature of the HVAC device in the target time period according to the target shutdown temperature; Controlling the operating state of the HVAC device in the target time period according to the target shutdown temperature and the target startup temperature; Wherein, determining the target shutdown temperature of the HVAC device in the target period includes: Obtain the current heat source temperature of the HVAC device; search a preset relationship library for a first shutdown temperature corresponding to the current heat source temperature and a reference load of the HVAC device; search the preset relationship library for a second shutdown temperature corresponding to the current heat source temperature and the target load; take the minimum value of the first shutdown temperature and the second shutdown temperature as the target shutdown temperature; the preset relationship library includes a matching relationship among the heat source temperature, load and water temperature of the HVAC device.

2. The method according to claim 1, characterized in that The power grid load control signal includes a load control parameter. After responding to the power grid load control signal, the method includes: The target load is determined according to the load control parameter and the reference load of the HVAC device.

3. The method according to claim 1, characterized in that The method further comprises: Obtain the user set temperature as the third shutdown temperature; The minimum value among the first shutdown temperature, the second shutdown temperature and the third shutdown temperature is used as the target shutdown temperature.

4. The method according to claim 1, characterized in that Determining the target startup temperature of the HVAC device in the target time period according to the target shutdown temperature includes: Obtaining a preset startup hysteresis of the HVAC device; The target startup temperature is obtained according to the target shutdown temperature and the preset startup hysteresis, and the target startup temperature is less than the target shutdown temperature.

5. The method according to claim 1, characterized in that Controlling the operating state of the HVAC device in the target time period according to the target shutdown temperature and the target startup temperature includes: According to the current water temperature of the HVAC device being lower than the target shutdown temperature and higher than or equal to the target startup temperature, controlling the HVAC device to be in a working state; According to the current water temperature of the HVAC device being greater than or equal to the target shutdown temperature, the HVAC device is controlled to be in a shutdown state.

6. The method according to claim 5, characterized in that Controlling the operating state of the HVAC device in the target time period according to the target shutdown temperature and the target startup temperature also includes: According to the current water temperature being lower than the target startup temperature, maintaining the current operating state of the HVAC device; or, According to the current water temperature being lower than the target startup temperature, in response to a temperature increase instruction, the HVAC device is controlled to be in a working state.

7. The method according to claim 1, characterized in that The method further comprises: According to the failure to receive the grid load control signal, searching a preset relationship library for a first shutdown temperature corresponding to the current heat source temperature and the reference load of the HVAC device; A user set temperature is obtained, and the target shutdown temperature is determined according to a minimum value between the first shutdown temperature and the user set temperature.

8. The method according to claim 1, characterized in that The method further comprises: According to the current load of the HVAC device exceeding the target load, controlling the HVAC device to be in a shutdown state; The target load includes one or more of a target voltage, a target current, a target amount of electricity and a target power.

9. A power grid response control device, characterized in that: The device comprises: A first processing module, configured to determine a target shutdown temperature of the HVAC device in a target period in response to a power grid load control signal, wherein the power grid load control signal is used to determine a target load, the target shutdown temperature represents a water temperature corresponding to when the HVAC device reaches the target load, and the target period is a period corresponding to the power grid load control signal; A second processing module is used to determine a target startup temperature of the HVAC device in the target time period according to the target shutdown temperature, wherein the target startup temperature is lower than the target shutdown temperature; A control module, used for controlling the operating state of the HVAC device in the target time period according to the target shutdown temperature and the target startup temperature; Among them, determining the target shutdown temperature of the HVAC device in the target period includes: Obtain the current heat source temperature of the HVAC device; search a preset relationship library for a first shutdown temperature corresponding to the current heat source temperature and a reference load of the HVAC device; search the preset relationship library for a second shutdown temperature corresponding to the current heat source temperature and the target load; take the minimum value of the first shutdown temperature and the second shutdown temperature as the target shutdown temperature; the preset relationship library includes a matching relationship among the heat source temperature, load and water temperature of the HVAC device.

10. 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 8.

11. A HVAC system, characterized in that: It comprises a HVAC device and the control device according to claim 9 or the electronic device according to claim 10.

12. The HVAC system according to claim 11, characterized in that: The HVAC device includes a heat pump water heater and a heat source system connected to the heat pump water heater; The heat source system is used to provide a heat source for the heat pump water heater; The heat pump water heater is used to utilize the heat source to increase the water temperature in the water heater pipeline.

13. 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 8.

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