Control method of water heater, water heater and computer readable storage medium

Abstract

Embodiments of the present application provide a water heater control method, a water heater and a computer readable storage medium, comprising the following steps: receiving a load adjustment request instruction from a power grid; adjusting a working mode of the water heater according to the load adjustment request instruction; and adjusting a set temperature of the water heater according to the load adjustment request instruction. Therefore, embodiments of the present application can cope with the load adjustment request instruction and timely adjust the working mode and the set temperature to adjust the power consumption of the water heater, so that the test standard can be reached, and the supply-demand relationship of the power system can also be balanced.

Description

Technical Field

[0001] This application relates to the field of water heater technology, and in particular to a control method for a water heater, a water heater, and a computer-readable storage medium. Background Technology

[0002] In related technologies, some regions, such as North America, have an electricity market mechanism designed to balance the supply and demand of the power system by adjusting users' electricity consumption behavior. However, current water heaters lack the processing logic to respond to grid commands and are unlikely to pass the testing standards for water heater response functions. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a control method for a water heater, a water heater, and a computer-readable storage medium, aiming to provide a water heater processing logic capable of responding to power grid commands and meeting testing standards, in order to balance the supply and demand relationship of the power system.

[0004] In a first aspect, embodiments of this application provide a method for controlling a water heater, including:

[0005] Receive load adjustment request instructions from the power grid;

[0006] The operating mode of the water heater is adjusted according to the load adjustment request command;

[0007] Adjust the set temperature of the water heater according to the load adjustment request command.

[0008] According to some embodiments of this application, adjusting the operating mode of the water heater according to the load adjustment request instruction includes one of the following:

[0009] When the load adjustment request command is a reduction request command, the water heater's operating mode is adjusted to economy mode;

[0010] When the load adjustment request instruction is a load request instruction, the working mode of the water heater is adjusted to the economy mode;

[0011] When the load adjustment request command is an emergency power rationing request command, the working mode of the water heater is adjusted to heat pump mode, wherein the energy saving level of the heat pump mode is higher than that of the economy mode.

[0012] When the load adjustment request command is an emergency power abandonment request command, the working mode of the water heater is adjusted to standby mode.

[0013] According to some embodiments of this application, after adjusting the operating mode of the water heater to the economy mode, the control method further includes:

[0014] In the economic mode, the water temperature at the top of the water tank is obtained;

[0015] When the water temperature at the top of the water tank is equal to or greater than the preset temperature, hot water is produced by a heat pump device.

[0016] When the water temperature at the top of the water tank is lower than the preset temperature, hot water is produced by a heat pump device and an electric auxiliary heating device.

[0017] According to some embodiments of this application, after the water heater's operating mode is adjusted to heat pump mode, the control method further includes:

[0018] In the heat pump mode, hot water is produced by a heat pump device.

[0019] According to some embodiments of this application, adjusting the set temperature of the water heater according to the load adjustment request instruction includes one of the following:

[0020] When the load adjustment request instruction is a reduction request instruction, the set temperature of the water heater is reduced based on the first adjustment step size to obtain a first target set temperature, wherein the first target set temperature is greater than or equal to a first preset value;

[0021] When the load adjustment request instruction is a load request instruction, the set temperature of the water heater is increased based on the second adjustment step size to obtain a second target set temperature, wherein the second target set temperature is greater than or equal to a second preset value;

[0022] When the load adjustment request command is an emergency power rationing request command, the set temperature of the water heater is reduced based on the third adjustment step size to obtain a third target set temperature, wherein the third target set temperature is greater than or equal to a third preset value.

[0023] According to some embodiments of this application, the control method further includes:

[0024] Maintain the adjusted working mode and the set temperature unchanged until the preset time is reached.

[0025] According to some embodiments of this application, the control method further includes:

[0026] Receive a query command from the power grid;

[0027] The status parameters of the water heater are determined according to the query command, and the status parameters are fed back to the power grid.

[0028] According to some embodiments of this application, determining the status parameters of the water heater according to the query instruction includes:

[0029] When the query command is a power query command, the voltage and current parameters of the water heater are obtained;

[0030] The power parameters of the water heater are determined based on the voltage parameters and the current parameters.

[0031] According to some embodiments of this application, determining the status parameters of the water heater according to the query instruction includes:

[0032] When the query instruction is an available energy storage capacity query instruction, the recovery thermal efficiency of the water heater, the first water storage energy content of the water heater during the heating process, and the second water storage energy content after the heating is stopped are obtained.

[0033] The current available energy storage capacity of the water heater is determined based on the first water storage energy content, the second water storage energy content, and the recovery thermal efficiency.

[0034] According to some embodiments of this application, determining the status parameters of the water heater according to the query instruction includes:

[0035] When the query instruction is a total energy storage capacity query instruction, the recovery thermal efficiency of the water heater, as well as the low-energy state energy content and high-energy state energy content of the stored water carried by the total energy storage capacity query instruction are obtained.

[0036] The current total energy storage capacity of the water heater is determined based on the low-energy state energy content of the stored water, the high-energy state energy content of the stored water, and the recovery thermal efficiency.

[0037] According to some embodiments of this application, the first water storage energy content is obtained through the following steps:

[0038] The average temperature rise of the upper and lower water temperatures in the water tank during the heating process is obtained, and the water tank capacity is determined based on the temperature rise.

[0039] Obtain the density, specific heat capacity, and first average values ​​of the water temperature at the top and bottom of the tank at multiple times;

[0040] The first water storage energy content is determined based on the water tank capacity, the density, the specific heat capacity, and the first average value.

[0041] According to some embodiments of this application, the second water storage energy content is obtained through the following steps:

[0042] Obtain the second average values ​​of the water tank capacity, water density and specific heat capacity, and the water temperature at the top and bottom of the tank after the heating is stopped;

[0043] The second water storage energy content is determined based on the water tank capacity, the density, the specific heat capacity, and the second average value.

[0044] According to some embodiments of this application, after receiving the load adjustment request instruction from the power grid, the control method further includes:

[0045] When the load adjustment request instruction is a reduction request instruction, obtain the third average value of the water tank capacity, water density and specific heat capacity, and the water temperature at the top and bottom of the water tank when the water heater starts heating.

[0046] The updated low-energy content of the stored water is determined based on the water tank capacity, the density, the specific heat capacity, and the third average value.

[0047] According to some embodiments of this application, after receiving the load adjustment request instruction from the power grid, the control method further includes:

[0048] When the load adjustment request instruction is a load request instruction, obtain the water tank capacity, water density and specific heat capacity, and the fourth average value of the water temperature at the top and bottom of the water tank when the water heater has completed heating.

[0049] The updated high-energy state content of the stored water is determined based on the water tank capacity, the density, the specific heat capacity, and the fourth average value.

[0050] Secondly, embodiments of this application provide a water heater, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor runs the computer program, it performs the water heater control method as described in the first aspect above.

[0051] According to some embodiments of this application, the water heater further includes a communication module, through which the water heater communicates with the power grid.

[0052] Thirdly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions for performing the water heater control method as described in the first aspect above.

[0053] According to the technical solution of this application embodiment, at least the following beneficial effects are achieved: First, this application embodiment receives a load adjustment request instruction from the power grid; then, this application embodiment adjusts the working mode of the water heater according to the load adjustment request instruction, and also adjusts the set temperature of the water heater according to the load adjustment request instruction. Therefore, this application embodiment can respond to the load adjustment request instruction and adjust the working mode and set temperature in a timely manner to adjust the power consumption of the water heater, thereby meeting the test standards and balancing the supply and demand relationship of the power system.

[0054] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0055] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0056] Figure 1 This is a schematic diagram of the structure of a water heater provided in one embodiment of this application;

[0057] Figure 2 This is a flowchart of a water heater control method provided in one embodiment of this application;

[0058] Figure 3 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0059] Figure 4 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0060] Figure 5 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0061] Figure 6 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0062] Figure 7 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0063] Figure 8 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0064] Figure 9 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0065] Figure 10This is a flowchart of a water heater control method provided in another embodiment of this application;

[0066] Figure 11 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0067] Figure 12 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0068] Figure 13 This is a flowchart of a water heater control method provided in another embodiment of this application;

[0069] Figure 14 This is a schematic diagram of a controller for performing a control method for a water heater according to an embodiment of this application. Detailed Implementation

[0070] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0071] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0072] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0073] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0074] In some regions, such as North America, there exists an electricity market mechanism designed to balance the supply and demand of the power system by adjusting users' electricity consumption behavior. However, current water heaters lack the logic to process grid commands and are unlikely to meet the testing standards for water heater response functions.

[0075] Specifically, Demand Response is an electricity market mechanism designed to balance the supply and demand of the power system by adjusting users' electricity consumption behavior. In the United States, the electricity market is managed by the Independent System Operator (ISO). The ISO formulates corresponding electricity market rules and directives based on the load conditions and generation capacity of the power system. When the power system is overloaded or generation capacity is insufficient, the ISO issues Demand Response directives to users, requiring them to reduce their electricity consumption to balance the supply and demand of the power system. These directives are usually communicated to users through power companies or third-party Demand Response service providers. Users can respond to these directives by reducing their electricity consumption or activating backup generation equipment. This can alleviate the load on the power system and prevent power system collapse or blackouts.

[0076] The CTA-2045 communication module is a standard developed by the Consumer Technology Association (CTA) for communication between smart grid devices and energy management systems. It supports bidirectional communication between devices such as smart thermostats, electric vehicles, and solar panels and the power grid. The module employs a secure and reliable communication protocol, ensuring the safety and efficiency of the power grid. It can monitor and control energy usage in real time, helping consumers save on utility bills and reduce their carbon footprint.

[0077] In order to meet the local power grid response requirements, North American residential heat pump water heaters need to be equipped with a CTA-2045 module that enables bidirectional communication with the power grid. This module acts as a bridge between the power grid and the water heater, receiving instructions from the power grid and transmitting them to the water heater so that it can take appropriate measures. At the same time, the water heater's measures or results can be sent back to the communication module, which then transmits them to the power grid.

[0078] Based on the above, this application proposes a water heater control method, a water heater, and a computer-readable storage medium, aiming to provide a water heater processing logic that can respond to power grid commands and meet testing standards, so as to balance the supply and demand relationship of the power system.

[0079] The various embodiments of the water heater of this application will be further described below with reference to the accompanying drawings.

[0080] like Figure 1 As shown, Figure 1This is a schematic diagram of the structure of a water heater provided in one embodiment of this application.

[0081] In one embodiment, the water heater 100 of this application includes a communication module 110, wherein the water heater 100 communicates with the power grid through the communication module 110.

[0082] It should be noted that the water heater 100 can receive instructions or data from the power grid through the communication module 110, and at the same time, the water heater 100 can also send instructions and data to the power grid through the communication module 110.

[0083] Based on the hardware structure of the water heater in the above embodiments, the following are various embodiments of the control method of the water heater of this application.

[0084] like Figure 2 As shown, Figure 2 This is a flowchart of a water heater control method according to an embodiment of this application. The water heater control method may include, but is not limited to, steps S210, S220, and S230.

[0085] Step S210: Receive a load adjustment request command from the power grid;

[0086] Step S220: Adjust the working mode of the water heater according to the load adjustment request command;

[0087] Step S230: Adjust the set temperature of the water heater according to the load adjustment request command.

[0088] In one embodiment, after the water heater receives a load adjustment request instruction from the power grid through the communication module, it will adjust the water heater's operating mode and set temperature based on the load adjustment request instruction.

[0089] It should be noted that the working mode of the water heater in this application embodiment may include heat pump mode, economy mode, electric auxiliary heating mode, heat pump and electric auxiliary heating hybrid mode, or other modes. This application embodiment does not specifically limit this mode.

[0090] Among them, heat pump mode refers to the working mode of water heater that produces hot water only through heat pump.

[0091] In addition, the economic mode refers to the working mode in which hot water is produced solely through a heat pump once the water temperature reaches a certain level, and simultaneously through both a heat pump and electric auxiliary heating before the water temperature reaches a certain level.

[0092] In addition, electric auxiliary heating mode refers to the working mode of the water heater that produces hot water only through electric auxiliary heating.

[0093] In addition, the heat pump and electric auxiliary heating hybrid mode refers to the working mode of the water heater that produces hot water simultaneously through heat pump and electric auxiliary heating.

[0094] It is worth noting that for the four operating modes mentioned above, the energy-saving effect of heat pump mode, economy mode, electric auxiliary heating mode, and heat pump-electric auxiliary heating hybrid mode gradually decreases. That is, the energy-saving effect of heat pump mode is higher than that of economy mode, economy mode is higher than that of electric auxiliary heating mode, and electric auxiliary heating mode is higher than that of heat pump-electric auxiliary heating hybrid mode.

[0095] Additionally, it is worth noting that for the four operating modes mentioned above, the hot water recovery speed of heat pump mode, economy mode, electric auxiliary heating mode, and heat pump-electric auxiliary heating hybrid mode increases progressively. That is, the hot water recovery speed of heat pump mode is less than that of economy mode, economy mode is less than that of electric auxiliary heating mode, and electric auxiliary heating mode is less than that of heat pump-electric auxiliary heating hybrid mode.

[0096] It should be noted that the load adjustment request instruction in the embodiments of this application may include a reduction request instruction, a load request instruction, an emergency power curtailment request instruction, an emergency power abandonment request instruction, or other types of request instructions, and the embodiments of this application do not specifically limit this.

[0097] It should be noted that both the power reduction request order and the emergency power restriction request order refer to requests to reduce the power consumption of water heaters. However, the emergency power restriction request order is more stringent than the power reduction request order. In other words, the power reduction required by the emergency power restriction request order is greater than the power reduction request order.

[0098] Additionally, it should be noted that a load request command refers to the current allowance of the power grid to supply electricity to the water heater's energy storage, but there are certain requirements regarding electricity consumption. Load request commands can include basic load request commands or advanced load request commands. Under a basic load request command, the amount of electricity the power grid is allowed to supply to the water heater will be lower than the amount of electricity the power grid is allowed to supply to the water heater under an advanced load request command.

[0099] Additionally, it should be noted that the emergency power cut-off request instruction refers to a request instruction to stop the water heater from using electricity.

[0100] It is worth noting that in this embodiment, different load adjustment request commands correspond to different operating modes. Therefore, the implementation of adjusting the operating mode of the water heater in step S220 may include, but is not limited to, the following situations:

[0101] The first implementation scenario: When the load adjustment request command is a reduction request command, the water heater's operating mode is adjusted to the economy mode.

[0102] The second implementation scenario: When the load adjustment request command is a loading request command, the water heater's operating mode is adjusted to economy mode. It should be noted that since the power consumption corresponding to the loading request command also has certain requirements, the electric auxiliary heating mode or the heat pump electric auxiliary heating hybrid mode cannot be used; only economy mode can be used.

[0103] The third implementation scenario: When the load adjustment request command is an emergency power rationing request command, the water heater's operating mode is adjusted to heat pump mode, where the energy-saving effect of heat pump mode is higher than that of economy mode.

[0104] The fourth implementation scenario: When the load adjustment request command is an emergency power abandonment request command, the water heater's working mode is adjusted to standby mode.

[0105] In addition, it is worth noting that the implementation of adjusting the set temperature of the water heater in step S230 above includes, but is not limited to, the following situations:

[0106] The first implementation scenario: When the load adjustment request command is a reduction request command, the set temperature of the water heater is reduced based on the first adjustment step size to obtain the first target set temperature, wherein the first target set temperature is greater than or equal to the first preset value;

[0107] The second implementation scenario: When the load adjustment request command is a loading request command, the set temperature of the water heater is increased based on the second adjustment step size to obtain the second target set temperature, wherein the second target set temperature is greater than or equal to the second preset value;

[0108] The third implementation scenario: When the load adjustment request command is an emergency power rationing request command, the set temperature of the water heater is reduced based on the third adjustment step to obtain the third target set temperature, wherein the third target set temperature is greater than or equal to the third preset value.

[0109] It is understood that the first adjustment step, the second adjustment step, and the third adjustment step mentioned above can be preset. The values ​​of these three adjustment step steps can be the same or different. This application embodiment does not specifically limit this.

[0110] In addition, it is understood that the first target set temperature, the second target set temperature and the third target set temperature mentioned above can be preset. The values ​​of the target set temperatures of these three can be the same or different. This application embodiment does not make specific limitations in this regard.

[0111] In addition, such as Figure 3 As shown, Figure 3 This is a flowchart of a water heater control method provided in another embodiment of this application. After adjusting the water heater's operating mode to the economy mode, the water heater control method of this embodiment may also include, but is not limited to, steps S310, S320, and S330.

[0112] Step S310: In economy mode, obtain the water temperature at the top of the water tank;

[0113] Step S320: When the water temperature at the top of the water tank is equal to or greater than the preset temperature, hot water is produced by the heat pump device.

[0114] Step S330: When the water temperature at the top of the water tank is lower than the preset temperature, hot water is produced by the heat pump device and the electric auxiliary heating device.

[0115] In one embodiment, the economic mode refers to a working mode in which hot water is produced solely by a heat pump once the water temperature reaches a certain level, and simultaneously by a heat pump and an electric auxiliary heating method before the water temperature reaches a certain level.

[0116] Specifically, if the water heater is operating in economy mode, it will use a temperature sensor to detect the water temperature at the top of the tank in real time. Then, it will compare the water temperature at the top of the tank with the preset temperature to obtain a comparison result. If the comparison result indicates that the water temperature at the top of the tank is equal to or greater than the preset temperature, the water heater will only use the heat pump device to produce hot water. If the comparison result indicates that the water temperature at the top of the tank is less than the preset temperature, the water heater will use both the heat pump device and the electric auxiliary heating device to produce hot water.

[0117] It is understood that the aforementioned preset temperature can be pre-set, and the embodiments of this application do not specifically limit the value of the preset temperature.

[0118] In addition, such as Figure 4 As shown, Figure 4 This is a flowchart of a water heater control method provided in another embodiment of this application. After adjusting the water heater's operating mode to heat pump mode, the water heater control method of this embodiment may also include, but is not limited to, steps S410 and S420.

[0119] Step S410: Determine that the water heater is in heat pump mode;

[0120] Step S420: In heat pump mode, hot water is produced by the heat pump device.

[0121] In one embodiment, heat pump mode refers to the operating mode in which the water heater produces hot water solely through a heat pump. Specifically, if the water heater is operating in heat pump mode, it will only produce hot water through the heat pump device.

[0122] In addition, such as Figure 5 As shown, Figure 5 This is a flowchart of a water heater control method provided in another embodiment of this application. Steps S210 to S230 may specifically include, but are not limited to, steps S510, S520, and S530.

[0123] Step S510: Receive a load adjustment request command from the power grid;

[0124] Step S520: Adjust the working mode of the water heater according to the load adjustment request command, and maintain the adjusted working mode unchanged until the preset time is reached;

[0125] Step S530: Adjust the set temperature of the water heater according to the load adjustment request command, and maintain the adjusted set temperature unchanged until the preset time is reached.

[0126] In one embodiment, after the water heater receives a load adjustment request instruction from the power grid through the communication module, it will adjust the water heater's operating mode and set temperature based on the load adjustment request instruction, and will maintain the adjusted operating mode and set temperature unchanged until a preset time is reached.

[0127] It should be noted that since the power consumption adjustment of the water heater has a certain time requirement, the adjusted working mode and set temperature need to be maintained for a certain period of time.

[0128] It is understood that the aforementioned preset duration can be pre-set, and the embodiments of this application do not specifically limit the value of the preset duration.

[0129] In addition, such as Figure 6 As shown, Figure 6 This is a flowchart of a water heater control method provided in another embodiment of this application. The water heater control method of this application embodiment may also include, but is not limited to, steps S610 and S620.

[0130] Step S610: Receive a query command from the power grid;

[0131] Step S620: Determine the status parameters of the water heater according to the query command, and feed the status parameters back to the power grid.

[0132] In one embodiment, after the water heater receives a query command sent by the power grid through the communication module, it will acquire or calculate the status parameters of the water heater based on the query command and send the obtained status parameters to the power grid.

[0133] It should be noted that the aforementioned query commands may include, but are not limited to, power query commands, available energy storage capacity query commands, or total energy storage capacity query commands. The execution steps for different types of query commands often differ; please refer to the following for details. Figures 7 to 9 As shown.

[0134] like Figure 7 As shown, Figure 7 This is a flowchart of a water heater control method provided in another embodiment of this application. The determination of the water heater's status parameters based on the query instruction in step S620 may include, but is not limited to, steps S710 and S720.

[0135] Step S710: When the query command is a power query command, obtain the voltage and current parameters of the water heater;

[0136] Step S720: Determine the power parameters of the water heater based on the voltage and current parameters.

[0137] In one embodiment, after the water heater receives a power query command sent by the power grid through the communication module, the water heater will obtain the voltage and current parameters of the water heater based on the power query command, and then calculate the power parameters of the water heater based on the voltage and current parameters, and feed the calculated power parameters back to the power grid.

[0138] In addition, such as Figure 8 As shown, Figure 8 This is a flowchart of a water heater control method provided in another embodiment of this application. The determination of the water heater's status parameters based on the query instruction in step S620 may include, but is not limited to, steps S810 and S820.

[0139] Step S810: When the query instruction is an available energy storage capacity query instruction, obtain the water heater's recovery thermal efficiency, the first water storage energy content during the heating process, and the second water storage energy content after the heating is stopped.

[0140] Step S820: Determine the current available energy storage capacity of the water heater based on the first water storage energy content, the second water storage energy content, and the recovery thermal efficiency.

[0141] In one embodiment, after the water heater receives the available energy storage capacity query instruction sent by the power grid through the communication module, the water heater will obtain the water heater's recovery thermal efficiency, the first water storage energy content during the heating process, and the second water storage energy content after the heating is stopped based on the available energy storage capacity query instruction. Then, based on the first water storage energy content, the second water storage energy content, and the recovery thermal efficiency, the water heater's current available energy storage capacity is calculated, and the calculated current available energy storage capacity is fed back to the power grid.

[0142] In addition, such as Figure 9 As shown, Figure 9 This is a flowchart of a water heater control method provided in another embodiment of this application. The determination of the water heater's status parameters based on the query command in step S620 may include, but is not limited to, steps S910 and S920.

[0143] Step S910: When the query instruction is a total energy storage capacity query instruction, obtain the water heater's recovery thermal efficiency, as well as the low-energy state energy content and high-energy state energy content of the stored water carried by the total energy storage capacity query instruction.

[0144] Step S920: Determine the current total energy storage capacity of the water heater based on the low-energy state energy content, high-energy state energy content, and recovery thermal efficiency of the stored water.

[0145] In one embodiment, after the water heater receives a total energy storage capacity query command sent by the power grid through the communication module, the water heater will obtain the water heater's recovery thermal efficiency, as well as the low-energy state energy content and high-energy state energy content of the stored water carried by the total energy storage capacity query command. Then, based on the low-energy state energy content, high-energy state energy content and recovery thermal efficiency, the water heater's current total energy storage capacity will be calculated, and the calculated current total energy storage capacity will be fed back to the power grid.

[0146] In addition, such as Figure 10 As shown, Figure 10 This is a flowchart of a water heater control method provided in another embodiment of this application. The process of obtaining the energy content of the first stored water may include, but is not limited to, steps S1010, S1020, and S1030.

[0147] Step S1010: Obtain the average temperature rise of the upper water temperature and the lower water temperature during the heating process, and determine the water tank capacity based on the temperature rise.

[0148] Step S1020: Obtain the density, specific heat capacity, and first average values ​​of the water temperature at the top and bottom of the tank at multiple times;

[0149] Step S1030: Determine the first water storage energy content based on the water tank capacity, density, specific heat capacity, and first average value.

[0150] In one embodiment, the process of obtaining the first water storage energy content is as follows: First, the average values ​​of the water temperature at the top and bottom of the tank during the heating process are obtained, and the temperature rise of the average value is calculated. Then, the tank capacity is determined based on the temperature rise. Next, in this embodiment, the density, specific heat capacity, and the first average values ​​of the water temperature at the top and bottom of the tank at multiple times are also obtained. Then, the first water storage energy content of the water heater is calculated based on the tank capacity, density, specific heat capacity, and the first average value, and the calculated first water storage energy content is fed back to the power grid.

[0151] In addition, such as Figure 11 As shown, Figure 11 This is a flowchart of a water heater control method provided in another embodiment of this application. The process of obtaining the energy content of the second water storage may include, but is not limited to, steps S1110 and S1120.

[0152] Step S1110: Obtain the water tank capacity, water density and specific heat capacity, and the second average values ​​of the water temperature at the top and bottom of the water tank after the heating is stopped;

[0153] Step S1120: Determine the energy content of the second water storage tank based on the tank capacity, density, specific heat capacity, and the second average value.

[0154] In one embodiment, the process of obtaining the second water storage energy content is as follows: First, this embodiment of the application obtains the water tank capacity, water density and specific heat capacity, and the second average value of the water temperature at the top and bottom of the water tank after the heating is stopped; then, the second water storage energy content of the water heater is calculated based on the water tank capacity, density, specific heat capacity and the second average value, and the calculated second water storage energy content is fed back to the power grid.

[0155] In addition, such as Figure 12 As shown, Figure 12 This is a flowchart of a water heater control method provided in another embodiment of this application. This embodiment also updates the low-energy content of the water stored in the water heater, and the updating process may include, but is not limited to, steps S1210 and S1220.

[0156] Step S1210: When the load adjustment request command is a reduction request command, obtain the water tank capacity, water density and specific heat capacity, and the third average value of the water temperature at the top and bottom of the water tank when the water heater starts heating.

[0157] Step S1220: Determine the updated low-energy state energy content of the stored water based on the water tank capacity, density, specific heat capacity, and third average value.

[0158] In one embodiment, after receiving a reduction request instruction, this embodiment of the application obtains the water tank capacity, water density and specific heat capacity, and a third average value of the water temperature at the top and bottom of the water tank when the water heater starts heating. Then, based on the water tank capacity, density, specific heat capacity and the third average value, the low-energy content of the water stored in the water heater is calculated, and the calculated low-energy content of the water stored in the water is fed back to the power grid.

[0159] In addition, such as Figure 13 As shown, Figure 13 This is a flowchart of a water heater control method provided in another embodiment of this application. This embodiment also updates the high-energy content of the water stored in the water heater, and the updating process may include, but is not limited to, steps S1310 and S1320.

[0160] Step S1310: When the load adjustment request instruction is a load request instruction, obtain the water tank capacity, water density and specific heat capacity, and the fourth average value of the water temperature at the top and bottom of the water tank when the water heater has completed heating.

[0161] Step S1320: Determine the updated high-energy state content of the stored water based on the water tank capacity, density, specific heat capacity, and fourth average value.

[0162] In one embodiment, after receiving the loading request instruction, this embodiment of the application will obtain the water tank capacity, water density and specific heat capacity, and the fourth average value of the water temperature at the top and bottom of the water tank when the water heater has completed heating. Then, based on the water tank capacity, density, specific heat capacity and the fourth average value, the high-energy content of the water stored in the water heater will be calculated, and the calculated high-energy content of the water stored in the water will be fed back to the power grid.

[0163] Based on the water heater control methods of the above embodiments, the overall embodiments of the water heater control method of this application are presented below.

[0164] In one embodiment, in order to satisfy ENERGY Connected Residential Water Heaters Test Method to Validate Demand Response, Version 1.2. According to North American local standards, developed North American heat pump water heaters must have corresponding response logic algorithms and be able to pass this test standard to determine if the product meets the requirements of the Residential Water Heater Response (DR) function in Energy Star Specification Version 5.0.

[0165] Common grid commands in testing standards include: ① sending a general load shedding request, ② sending a basic load or advanced load shedding request, ③ sending an emergency load shedding request, ④ sending an emergency power curtailment request, and ⑤ sending power / demand, current available energy storage capacity, and, if possible, providing a query for the current total energy storage capacity. When a heat pump water heater receives these commands, it needs to output corresponding response logic algorithms.

[0166] The handling strategies for the various commands issued by the power grid are shown in Table 1 below:

[0167] Table 1

[0168]

[0169] Among them, the working modes of heat pump water heaters mainly include: heat pump mode, economy mode, electric auxiliary heating mode, and heat pump + electric auxiliary heating hybrid mode. The energy saving of electricity consumption gradually decreases, but the hot water recovery speed gradually increases.

[0170] Furthermore, the logical algorithms for the current available energy storage capacity and the current total energy storage capacity are shown in Table 2 below:

[0171] Table 2

[0172]

[0173] Based on the control methods for water heaters described in the above embodiments, the following presents various embodiments of the controller, water heater, and computer-readable storage medium of this application.

[0174] like Figure 14 As shown, Figure 14 This is a schematic diagram of the structure of a controller for performing a control method for a water heater according to an embodiment of this application. The controller 200 implemented in this application includes: a processor 210, a memory 220, and a computer program stored in the memory 220 and executable on the processor 210, wherein... Figure 14 The example uses a processor 210 and a memory 220.

[0175] The processor 210 and the memory 220 can be connected via a bus or other means. Figure 14 Taking the example of a connection between China and Israel via a bus.

[0176] Memory 220, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 220 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 220 may optionally include remotely located memories 220 relative to processor 210, which can be connected to controller 200 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0177] Those skilled in the art will understand that Figure 14 The device structure shown does not constitute a limitation on the controller 200 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0178] exist Figure 14 In the controller 200 shown, the processor 210 can be used to call the water heater control program stored in the memory 220, thereby implementing the water heater control method described above. Specifically, the non-transitory software program and instructions required to implement the water heater control method of the above embodiment are stored in the memory 220. When executed by the processor 210, the water heater control method of the above embodiment is executed.

[0179] It is worth noting that since the controller 200 of this application embodiment can execute the water heater control method of any of the above embodiments, the specific implementation method and technical effects of the controller 200 of this application embodiment can be referred to the specific implementation method and technical effects of the water heater control method of any of the above embodiments.

[0180] In addition, one embodiment of this application also provides a water heater, including the controller described in the above embodiment.

[0181] It is worth noting that, since the water heater in this application embodiment includes the controller of the above embodiment, and the controller of the above embodiment can execute the control method of the water heater in any of the above embodiments, the specific implementation method and technical effect of the water heater in this application embodiment can refer to the specific implementation method and technical effect of the control method of the water heater in any of the above embodiments.

[0182] Furthermore, one embodiment of this application also provides a computer-readable storage medium storing computer-executable instructions for performing the aforementioned water heater control method. Exemplarily, the above-described method is executed... Figures 2 to 13 The methods and steps in the text.

[0183] It is worth noting that, since the computer-readable storage medium of this application embodiment can execute the water heater control method of any of the above embodiments, the specific implementation and technical effects of the computer-readable storage medium of this application embodiment can be referred to the specific implementation and technical effects of the water heater control method of any of the above embodiments.

[0184] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0185] The above provides a detailed description of the preferred embodiments of this application. However, this application is not limited to the above-described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A control method of a water heater, characterized by, include: Receive load adjustment request instructions from the power grid; The operating mode of the water heater is adjusted according to the load adjustment request command; Adjust the set temperature of the water heater according to the load adjustment request command; The control method further includes: receiving a query command from the power grid; determining the status parameters of the water heater according to the query command; and feeding the status parameters back to the power grid. In addition, determining the status parameters of the water heater according to the query instruction includes: when the query instruction is an available energy storage capacity query instruction, obtaining the recovery thermal efficiency of the water heater, the first water storage energy content of the water heater during the heating process, and the second water storage energy content after the heating is stopped; and determining the current available energy storage capacity of the water heater according to the first water storage energy content, the second water storage energy content, and the recovery thermal efficiency. In addition, the first water storage energy content is obtained through the following steps: obtaining the temperature rise of the average water temperature at the top and bottom of the water tank during the heating process, and determining the water tank capacity based on the temperature rise; obtaining the water density, specific heat capacity, and the first average water temperature at the top and bottom of the water tank at multiple times; and determining the first water storage energy content based on the water tank capacity, the density, the specific heat capacity, and the first average value. In addition, the second water storage energy content is obtained through the following steps: obtaining the water tank capacity, water density and specific heat capacity, and the second average value of the water temperature at the top and bottom of the water tank after the heating is stopped; and determining the second water storage energy content based on the water tank capacity, the density, the specific heat capacity and the second average value.

2. A method for controlling a water heater, characterized in that, include: Receive load adjustment request instructions from the power grid; The operating mode of the water heater is adjusted according to the load adjustment request command; Adjust the set temperature of the water heater according to the load adjustment request command; The control method further includes: receiving a query command from the power grid; determining the status parameters of the water heater according to the query command; and feeding the status parameters back to the power grid. In addition, determining the state parameters of the water heater according to the query instruction includes: when the query instruction is a total energy storage capacity query instruction, obtaining the recovery thermal efficiency of the water heater, as well as the low-energy state energy content and high-energy state energy content of the stored water carried by the total energy storage capacity query instruction; and determining the current total energy storage capacity of the water heater according to the low-energy state energy content, the high-energy state energy content of the stored water, and the recovery thermal efficiency. In addition, the low-energy content of the stored water is obtained through the following steps: when the load adjustment request command is a reduction request command, the water tank capacity, water density and specific heat capacity, and the third average value of the water temperature at the top and bottom of the water tank when the water heater starts heating are obtained; the updated low-energy content of the stored water is determined based on the water tank capacity, the density, the specific heat capacity and the third average value. In addition, the high-energy content of the stored water is obtained through the following steps: when the load adjustment request instruction is a loading request instruction, the water tank capacity, water density and specific heat capacity, and the fourth average value of the water temperature at the top and bottom of the water tank when the water heater has completed heating are obtained; the updated high-energy content of the stored water is determined based on the water tank capacity, the density, the specific heat capacity and the fourth average value.

3. The control method according to claim 1 or 2, characterized in that, Adjusting the operating mode of the water heater according to the load adjustment request command includes one of the following: When the load adjustment request command is a reduction request command, the water heater's operating mode is adjusted to economy mode; When the load adjustment request instruction is a load request instruction, the working mode of the water heater is adjusted to the economy mode; When the load adjustment request command is an emergency power rationing request command, the working mode of the water heater is adjusted to heat pump mode, wherein the energy saving level of the heat pump mode is higher than that of the economy mode. When the load adjustment request command is an emergency power abandonment request command, the working mode of the water heater is adjusted to standby mode.

4. The control method according to claim 3, characterized in that, After adjusting the water heater's operating mode to economy mode, the control method further includes: In the economic mode, the water temperature at the top of the water tank is obtained; When the water temperature at the top of the water tank is equal to or greater than the preset temperature, hot water is produced by a heat pump device. When the water temperature at the top of the water tank is lower than the preset temperature, hot water is produced by a heat pump device and an electric auxiliary heating device.

5. The control method according to claim 3, characterized in that, After the water heater's operating mode is adjusted to heat pump mode, the control method further includes: In the heat pump mode, hot water is produced by a heat pump device.

6. The control method according to claim 1 or 2, characterized in that, Adjusting the set temperature of the water heater according to the load adjustment request command includes one of the following: When the load adjustment request instruction is a reduction request instruction, the set temperature of the water heater is reduced based on the first adjustment step size to obtain a first target set temperature, wherein the first target set temperature is greater than or equal to a first preset value; When the load adjustment request instruction is a load request instruction, the set temperature of the water heater is increased based on the second adjustment step size to obtain a second target set temperature, wherein the second target set temperature is greater than or equal to a second preset value; When the load adjustment request command is an emergency power rationing request command, the set temperature of the water heater is reduced based on the third adjustment step size to obtain a third target set temperature, wherein the third target set temperature is greater than or equal to a third preset value.

7. The control method according to claim 1 or 2, characterized in that, The control method further includes: Maintain the adjusted working mode and the set temperature unchanged until the preset time is reached.

8. The control method according to claim 1 or 2, characterized in that, Determining the status parameters of the water heater according to the query instruction includes: When the query command is a power query command, the voltage and current parameters of the water heater are obtained; The power parameters of the water heater are determined based on the voltage parameters and the current parameters.

9. A water heater, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method as described in any one of claims 1 to 8 when running the computer program.

10. The water heater according to claim 9, characterized in that, The water heater also includes a communication module, through which it communicates with the power grid.

11. A computer-readable storage medium, characterized in that: The device stores computer-executable instructions for performing the control method as described in any one of claims 1 to 8.

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