Control method of a circulation heat pump hot water system, hot water system and storage medium

Abstract

The application relates to the technical field of automatic control, and provides a control method of a circulating heat pump hot water system, the circulating heat pump hot water system and a storage medium. The control method of the circulating heat pump hot water system comprises the following steps: in the case that a first target time period is reached, it is determined whether there is a target water tank to be heated; the heating cost of the first target time period is less than the heating cost of other time periods except the first target time period; in the case that there is the target water tank to be heated, the system controls the water in the target water tank to be heated to be heated; and in the case that the water in the target water tank to be heated is heated, the target water tank to be heated is determined as a hot water tank. Since the volume of the water storage tank can be fully utilized to store the hot water required in the first target time period, and the heating cost of the first target time period is less than the heating cost of other time periods, the volume of the water storage tank and the time-of-use electricity supply policy can be fully utilized to reduce the hot water supply cost.

Description

Technical Field

[0001] This application relates to the field of automatic control technology, and in particular to a control method, hot water system and storage medium for a circulating heat pump hot water system. Background Technology

[0002] Because circulating heat pump units need to heat the water in the storage tank multiple times, in order to ensure a stable water supply temperature, the water in the two storage tanks generally needs to be heated alternately, resulting in the storage tank volume of the circulating heat pump water heating system being larger than that of the direct-heating heat pump water heating system.

[0003] In related technologies, the control method for a circulating heat pump water heating system includes: when the water level in the target water storage tank is detected to be lower than the minimum water level, switching to a hot water supply tank to replenish water to the target water storage tank; and after replenishment, controlling the system to heat the target water storage tank. Based on this, heat pump systems in related technologies typically use a flat-rate power supply.

[0004] However, the control methods of circulating heat pump water heating systems in related technologies cannot fully utilize the volume of the water storage tank and the time-of-use electricity pricing policy, which leads to the problem of high heating costs for circulating heat pump systems. Summary of the Invention

[0005] To help address the problem of high heating costs caused by the inability of circulating heat pump water heating systems to fully utilize the capacity of the storage tank and the time-of-use electricity pricing policy, this application provides a control method, a water heating system, and a storage medium for a circulating heat pump water heating system.

[0006] In a first aspect, this application provides a control method for a circulating heat pump water heating system, employing the following technical solution:

[0007] Within the first target time period, determine whether there is a water tank to be heated; the heating cost during the first target time period is less than the heating cost during other time periods outside the first target time period;

[0008] In the presence of the water tank to be heated, the system is controlled to heat the water in the target water tank.

[0009] Once the water in the target water tank to be heated has been heated, the target water tank to be heated is designated as a hot water supply tank.

[0010] By adopting the above technical solution, the problem of high heating costs caused by the inability of circulating heat pump water heating systems to fully utilize the capacity of the storage tank and the time-of-use electricity pricing policy can be solved. Since the existence of a target water tank to be heated is determined within the first target time period, and the water in the target water tank is heated when it exists, the required hot water can be fully stored in the storage tank within the first target time period. This helps reduce the heating demand of the system in other time periods, and the heating cost in the first target time period is lower than that in other time periods. Thus, while ensuring the supply of hot water, the capacity of the storage tank and the time-of-use electricity pricing policy can be fully utilized to reduce heating costs, thereby lowering the heating cost of the circulating heat pump water heating system.

[0011] Optionally, the system includes two or more water storage tanks, and when the water in the target water tank to be heated is heated, it further includes:

[0012] The number of remaining heating water tanks has decreased by one;

[0013] Whether to continue heating is determined based on the number of remaining heating water tanks;

[0014] If it is determined that heating will continue, return to the step of determining whether there is a water tank to be heated within the first target time period.

[0015] By adopting the above technical solution, the number of remaining heating tanks is reduced by one after the water in the target heating tank has been heated, and the decision to continue heating is based on the number of remaining heating tanks. In this way, the amount of hot water heated can be controlled by the number of remaining heating tanks, which helps to avoid the problem of wasting resources due to the amount of hot water heated exceeding the demand, and thus can reduce heating costs.

[0016] Optionally, the method further includes:

[0017] If the conditions for updating the number of remaining heating water tanks are met, update the number of remaining heating water tanks.

[0018] By adopting the above technical solution, the number of remaining heating water tanks can be updated automatically when the conditions for updating the number of remaining heating water tanks are met. This makes it easier to control the amount of hot water heated by the system based on the number of remaining heating water tanks.

[0019] Optionally, the other time periods include a second target time period and a third target time period, wherein the heating cost of the second target time period is lower than the heating cost of the third target time period, and the method further includes:

[0020] During the second target time period, it is determined whether to perform heating based on the number of remaining heating water tanks;

[0021] If heating is determined to be performed, determine whether the water tank to be heated exists;

[0022] In the presence of the water tank to be heated, the system is controlled to heat the water in the target water tank.

[0023] Once the water in the target water tank is heated, the target water tank is designated as the hot water supply tank, the number of remaining water tanks is reduced by one, and the process returns to the step of determining whether to heat water based on the number of remaining water tanks within the second target time period.

[0024] By adopting the above technical solution, since heating is determined based on the number of remaining heating tanks during the second target time period, and the water in the target heating tank is heated when heating is determined and there is a target heating tank, the required hot water can be fully stored in the storage tank during the second target time period. This helps to reduce the heating demand of the system during the third target time period. The heating cost during the second target time period is less than that during the third target time period. In this way, while ensuring the supply of hot water, the volume of the storage tank and the time-of-use electricity pricing policy can be fully utilized to reduce heating costs, thereby reducing the heating cost of the circulating heat pump water heating system.

[0025] Optionally, the second time period includes nighttime and non-nighttime periods. The step of determining whether to heat water based on the remaining number of heating tanks when the second target time period is reached includes:

[0026] When the nighttime period is reached, the expected heating duration is determined based on the operating mode and the amount of remaining hot water;

[0027] Determine whether the expected heating time is greater than a preset heating time threshold, wherein the heating time threshold is determined based on the duration of the first target time period and the non-nighttime time period;

[0028] If the expected heating time exceeds the heating time threshold, it is determined whether to perform heating based on the number of remaining heating water tanks.

[0029] By adopting the above technical solution, since the nighttime temperature is lower than the non-nighttime temperature, the resources consumed by the system for heating at night will also increase. Therefore, heating is only determined based on the number of remaining heating water tanks when the expected heating time exceeds the heating time threshold. This can reduce the heating time at night, thereby helping to reduce the heating cost of the circulating heat pump water heating system.

[0030] Optionally, the method further includes:

[0031] The system detects whether the water volume in the target hot water tank is less than the preset minimum water volume threshold.

[0032] If the water volume in the target hot water tank is less than the minimum water volume threshold, the control system stops the water supply to the target hot water tank and replenishes the target hot water tank with water. After the water replenishment is completed, the target hot water tank is designated as the water tank to be heated.

[0033] By adopting the above technical solution, when the water volume in the target hot water tank is less than the minimum water volume threshold, the water supply to the target hot water tank is stopped, and after the target hot water tank is replenished, the target heating tank is identified as the water tank to be heated. This makes it easier for the control system to heat the water in the water tank to be heated within the planned time period, thereby improving the stability of the operation of the circulating heat pump hot water system.

[0034] Optionally, the method further includes:

[0035] Determine the remaining water supply demand if there is only one hot water tank.

[0036] If the remaining water supply demand exceeds the remaining water supply capacity of the hot water tank, the control system outputs an alarm and / or heats the water in the target hot water tank.

[0037] By adopting the above technical solution, when the remaining water supply demand exceeds the remaining water supply capacity of the water tank, the control system outputs an alarm and / or heats the water in the target water tank. This can prompt the user to take action and / or the control system to heat the water when the remaining water supply capacity of the hot water tank is about to be insufficient, thereby helping to ensure a stable hot water supply and improve the reliability of the circulating heat pump water heating system.

[0038] Optionally, before controlling the system to heat the water in the target water tank, the method further includes:

[0039] Determine whether the water temperature in the hot water tank is lower than the preset minimum heating temperature threshold.

[0040] If the water temperature in the hot water tank is lower than the minimum heating temperature threshold, the system is controlled to heat the water in the hot water tank.

[0041] By adopting the above technical solution, when the control system heats the water in the hot water tank, it determines that the water temperature in the hot water tank is lower than the minimum temperature threshold. This helps to ensure the water temperature in the hot water tank, thereby helping to guarantee the heating temperature of the system and improving the reliability of the circulating heat pump water heating system.

[0042] Secondly, this application provides a circulating heat pump water heating system, which adopts the following technical solution:

[0043] A circulating heat pump water heating system includes a water tank module, a heating module, a circulating pump, and a control module; the water tank module includes at least two tanks.

[0044] The water tank module includes a water storage tank, a first water inlet, a second water inlet, a first water outlet and a second water outlet, a first control valve, a second control valve, a third control valve, a fourth control valve, a temperature monitoring component and a water level monitoring component; the first water inlet, the second water inlet, the first water outlet and the second water outlet are disposed on the water storage tank;

[0045] The heating module includes a third water inlet, a heating source, and a third water outlet, wherein the third water inlet is connected to the third water outlet through the heating source;

[0046] The first water inlet is connected to an external water supply pipe via the first control valve; the first water outlet is connected to the third water inlet via the second control valve and the circulation pump in sequence; the third water outlet is connected to the second water inlet via the third control valve; and the second water outlet is connected to a hot water supply pipe via the fourth control valve.

[0047] The heating source, the first control valve, the second control valve, the third control valve, the fourth control valve, the circulation pump, the temperature monitoring component, and the water level monitoring component are respectively connected to the control module via signals.

[0048] The control module is used to execute any of the control methods for a circulating heat pump water heating system provided in the first aspect.

[0049] Thirdly, this application provides a computer-readable storage medium, which adopts the following technical solution:

[0050] A computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to perform a control method for any of the circulating heat pump water heating systems provided in the first aspect.

[0051] In summary, this application includes at least one of the following beneficial technical effects:

[0052] 1. Since it is determined whether there is a target water tank to be heated during the first target time period, and the water in the target water tank is heated when there is a target water tank to be heated, the volume of the storage tank can be fully utilized to store the required hot water during the first target time period. This can help reduce the heating demand of the system in other time periods. The heating cost in the first target time period is less than the heating cost in other time periods. In this way, while ensuring the supply of hot water, the volume of the storage tank and the time-of-use electricity pricing policy can be fully utilized to reduce heating costs, thereby reducing the heating cost of the circulating heat pump water heating system.

[0053] 2. Since heating is determined based on the number of remaining heating tanks during the second target time period, and the water in the target tank is heated when heating is determined and a target tank exists, the required hot water can be fully utilized within the storage tank during the second target time period. This helps reduce the heating demand of the system during the third target time period. The heating cost during the second target time period is lower than that during the third target time period. Thus, while ensuring the supply of hot water, the volume of the storage tank and the time-of-use electricity pricing policy can be fully utilized to reduce heating costs, thereby reducing the heating cost of the circulating heat pump water heating system. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of a circulating heat pump water heating system provided in an embodiment of this application;

[0055] Figure 2 This is another structural schematic diagram of a circulating heat pump water heating system provided in an embodiment of this application;

[0056] Figure 3 This is a schematic flowchart of a control method for a circulating heat pump water heating system provided in an embodiment of this application;

[0057] Figure 4 This is another schematic flowchart of a control method for a circulating heat pump water heating system provided in an embodiment of this application;

[0058] Figure 5 This is another schematic flowchart of a control method for a circulating heat pump water heating system provided in the embodiments of this application;

[0059] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0060] Explanation of reference numerals in the attached drawings: 110, Water tank module; 111, Water storage tank; 112, First water inlet; 113, Second water inlet; 114, First water outlet; 115, Second water outlet; 116, First control valve; 117, Second control valve; 118, Third control valve; 119, Fourth control valve; 110a, First water tank module; 110b, Second water tank module; 110c, Third water tank module; 120, Heating module; 121, Third water inlet; 122, Heating source; 123, Third water outlet; 130, Circulation pump; 141, Temperature monitoring component; 142, Water level monitoring component. Detailed Implementation

[0061] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-6 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0062] This application discloses a circulating heat pump water heating system. (Refer to...) Figure 1 The circulating heat pump water heating system includes: a water tank module 110, a heating module 120, a circulating pump 130, and a control module (not shown in the figure).

[0063] The water tank module 110 includes a water storage tank 111, a first inlet 112, a second inlet 113, a first outlet 114, a second outlet 115, a first control valve 116, a second control valve 117, a third control valve 118, a fourth control valve 119, a temperature monitoring component 141, and a water level monitoring component 142. The first inlet 112, the second inlet 113, the first outlet 114, and the second outlet 115 are located on the water storage tank 111.

[0064] The heating module 120 includes a third water inlet 121, a heating source 122 and a third water outlet 123. The third water inlet 121 is connected to the third water outlet 123 through the heating source 122.

[0065] The first water inlet 112 is connected to an external water supply pipe via the first control valve 116; the first water outlet 114 is connected to the third water inlet 121 via the second control valve 117 and the circulation pump 130; the third water outlet 123 is connected to the second water inlet 113 via the third control valve 118; and the second water outlet 115 is connected to the hot water supply pipe via the fourth control valve 119.

[0066] The circulation pump 130 is used to drive water to circulate between the water storage tank 111 and the heating module 120 when the second control valve 117 and the third control valve 118 are open, so that the water in the water storage tank can be heated by the heating module.

[0067] Thus, when the first control valve 116 is open, water from the external water supply pipe flows into the water storage tank 111 sequentially through the first control valve 116 and the first inlet 112; when the second control valve 117 is open, water from the water storage tank 111 flows into the heating source 122 sequentially through the first outlet 114, the second control valve 117, the circulation pump 130, and the second inlet 113; when the third control valve 118 is open, water from the heating source 122 flows into the water storage tank 111 sequentially through the third outlet 123, the third control valve 118, and the second inlet 113; when the fourth control valve 119 is open, water from the water storage tank 111 flows into the hot water supply pipe sequentially through the second outlet 115 and the fourth control valve 119.

[0068] The heating source 122 is used to prepare hot water. In this embodiment, the heating source 122 is an electric heating source, such as a heat pump unit, an electric water heater, or other components that can heat water. The heat pump unit can be a circulating heat pump unit or a direct-heating heat pump unit. This embodiment does not limit the type of heating source 122. For ease of description, this embodiment uses a circulating heat pump unit as an example for illustration.

[0069] Optionally, the volume of the water storage tank 111 is set based on the heating demand and the heating capacity of the heating source 122.

[0070] In one example, a day can be divided into off-peak, flat-price, and peak periods based on different electricity prices. The electricity price during off-peak periods is lower than that during flat-price periods, and the electricity price during flat-price periods is lower than that during peak periods. The volume of the water storage tank 111 is greater than or equal to the amount of hot water that the heating source 122 can produce during off-peak periods, so that hot water can be produced during off-peak periods can be fully utilized, thereby reducing heating costs.

[0071] Optionally, the water storage tank 111 can be installed indoors. Due to the high indoor temperature and low airflow, heat loss can be reduced, thus lowering heating costs. Furthermore, an insulation layer can be installed on the outer layer of the water storage tank 111 to further reduce heat loss and thus lower heating costs.

[0072] To facilitate monitoring of the water level in the water storage tank 111, the water tank module 110 also includes a water level monitoring component 142. The water level monitoring component 142 is installed inside the water storage tank 111 and is used to collect water level data in the water storage tank 111.

[0073] To facilitate monitoring of the outlet water temperature of the water storage tank 111, the water tank module 110 also includes a temperature monitoring component 141. In one example, the temperature monitoring component 141 is located at the first outlet 114 or the second outlet 115 to collect the outlet water temperature data of the water storage tank 111. In actual implementation, the temperature monitoring component 141 can also be installed in other locations within the water storage tank 111, such as on the inner wall of the water storage tank 111, as long as the water temperature in the water storage tank 111 can be measured. This embodiment does not limit the installation location of the temperature monitoring component 141.

[0074] In this embodiment, the heating source 122, the first control valve 116, the second control valve 117, the third control valve 118, the fourth control valve 119, the circulation pump 130, the temperature monitoring component 141, and the water level monitoring component 142 are respectively connected to the control module via signals. Thus, the control module can control the operation of the heating source and the flow direction in the water tank module to achieve the supply of hot water.

[0075] The control module can be a device with computing and storage functions, such as a computer, microcontroller unit (MCU), or single-chip microcomputer. This embodiment does not limit the type of control module.

[0076] In one example, the first control valve 116, the second control valve 117, the third control valve 118 and / or the fourth control valve 119 are one-way valves. In this case, the control module can control the opening and closing of the first control valve 116, the second control valve 117, the third control valve 118 and / or the fourth control valve 119.

[0077] In another example, the first control valve 116, the second control valve 117, the third control valve 118 and / or the fourth control valve 119 are bidirectional valves, in which case the controller can control the conduction direction of the first control valve 116, the second control valve 117, the third control valve 118 and / or the fourth control valve 119.

[0078] In this embodiment, the water tank module 110 includes two or more, so that while the heating module 120 is used to heat the water in one water tank module 110, other water tank modules 110 can be used to heat the hot water supply pipe, thereby improving the stability of the hot water supply and thus improving the user experience.

[0079] In one instance, refer to Figure 2The water tank module 110 includes three modules: a first water tank module 110a, a second water tank module 110b, and a third water tank module 110c. The connection methods of the first water tank module 110a, the second water tank module 110b, and the third water tank module 110c with the heating module 120, the external water supply pipe, and the hot water supply pipe are the same as described above, and will not be repeated here in this embodiment.

[0080] The implementation principle of a circulating heat pump water heating system according to an embodiment of this application is as follows: The circulating heat pump water heating system includes a water tank module, a heating module, a circulating pump, and a control module; the water tank module includes a water storage tank, a first inlet, a second inlet, a first outlet, a second outlet, a first control valve, a second control valve, a third control valve, a fourth control valve, a temperature monitoring component, and a water level monitoring component; the first inlet, the second inlet, the first outlet, and the second outlet are installed on the water storage tank; the heating module includes a third inlet, a heating source, and a third outlet; the third inlet is connected to the third outlet through the heating source; the first inlet is connected to an external water supply pipe through the first control valve. The system is as follows: the first outlet is connected to the third inlet via the second control valve; the third outlet is connected to the second inlet via the third control valve; the second outlet is connected to the hot water supply pipe via the fourth control valve; the heating source, the first control valve, the second control valve, the third control valve, and the fourth control valve are respectively connected to the control module via signal connections. Thus, the control module can control the water inlet of the storage tank by controlling the first control valve, control the heating module to heat the water in the storage tank by controlling the second control valve, the heating source, and the third control valve, and control the storage tank to supply water to the hot water supply pipe by controlling the fourth control valve. This enables automated control of the circulating heat pump hot water system and reduces heating costs.

[0081] This application also discloses a control method for a circulating heat pump water heating system, used in an electronic device. This embodiment uses the control module of the aforementioned circulating heat pump water heating system as an example for illustration. In other embodiments, the electronic device may also be the control module of other circulating heat pump water heating systems or other devices connected to the control module of the circulating heat pump water heating system. This embodiment does not limit the type of electronic device. (Reference) Figure 3 The control method for a circulating heat pump water heating system includes the following steps:

[0082] Step 301: Within the first target time period, determine whether there is a water tank to be heated.

[0083] The heating cost during the first target time period is less than the heating cost during other time periods outside the first target time period.

[0084] In one example, the first target time period includes the daily low-end periods.

[0085] In one instance, the off-peak period is from 11:00 PM to 7:00 AM the following day.

[0086] Since the electricity price during off-peak hours is lower than that during off-peak hours and peak hours, the heating cost during the first target time period is lower than the heating cost during other time periods outside the first target time period.

[0087] In this embodiment, for ease of description, the water storage tank is divided into a water tank to be heated and a hot water supply tank based on the state of the water in the tank. For example, the water storage tank is divided into a water tank to be heated and a hot water supply tank based on the temperature of the water in the tank. Specifically, after water is added to the water storage tank through an external water supply pipe, the water storage tank is designated as a water tank to be heated, at which point the water in the water storage tank awaits heating. After the water in the water tank to be heated is heated, the water storage tank is designated as a hot water supply tank, at which point the water storage tank can supply water to the hot water supply pipeline. If the remaining water in the hot water supply tank is less than the preset minimum water volume, the water supply to the heating pipeline is stopped, and water is added through an external water supply pipe, after which the water storage tank is designated as a water tank to be heated.

[0088] It should be noted that in this embodiment, the water tank to be heated and the hot water supply tank are only descriptions of the state of the water storage tank. That is, the same water storage tank can be a hot water supply tank or a water tank to be heated at different times.

[0089] Optionally, the number of water storage tanks can be one, or two or more; this embodiment does not limit the number of water storage tanks. In one example, refer to... Figure 2 There are three water storage tanks, so that while water in one tank is being heated, the other tanks can be used for heating, thus ensuring the stability of the hot water supply and improving the user experience.

[0090] Step 302: If a water tank to be heated exists, the control system heats the water in the target water tank.

[0091] In one example, the target water tank to be heated refers to the water tank with the longest waiting time among all the water tanks to be heated. Specifically, if there is only one water tank to be heated, then that water tank is the target water tank to be heated; if there are two or more water tanks to be heated, then the water tank that is first identified as the water tank to be heated is designated as the target water tank to be heated.

[0092] In actual implementation, the target water tank to be heated can be any one of the various water tanks to be heated, and this embodiment does not limit this.

[0093] Step 303: Once the water in the target water tank to be heated has been heated, the target water tank to be heated is designated as the hot water supply tank.

[0094] Optionally, determining whether the target water tank has completed heating can be achieved by: determining whether the water temperature in the target water tank has reached a preset starting heating temperature threshold; and determining that the target water tank has completed heating if the water temperature in the target water tank has reached the preset starting heating temperature threshold. Since determining whether the target water tank has completed heating is based on the water temperature in the target water tank improves the accuracy of the judgment, thereby enhancing the stability of the heating system.

[0095] The threshold temperature for starting heating is pre-stored in the electronic device and can be preset by the user according to the actual situation.

[0096] In actual implementation, the heating of the target water tank can also be determined in other ways, such as whether the heating time of the target water tank has reached the expected single heating time of the target water tank. This embodiment does not limit the method of determining whether the heating of the target water tank has been completed.

[0097] Optionally, the system includes two or more water tanks. In this case, step 104, after the water in the target water tank to be heated has been heated, also includes: reducing the number of remaining water tanks by one; determining whether to continue heating based on the number of remaining water tanks; if it is determined to continue heating, returning to the step of determining whether there is a water tank to be heated in the first target time period, and executing step 101.

[0098] The remaining number of heating water tanks refers to the number of remaining water tanks that need to be heated.

[0099] In one example, determining whether to continue heating based on the number of remaining heating tanks includes: determining whether the number of remaining heating tanks is greater than 0; if so, determining to continue heating; otherwise, determining not to continue heating.

[0100] In the above technical solution, since the number of remaining heating tanks is reduced by one after the water in the target heating tank is heated, and whether to continue heating is determined based on the number of remaining heating tanks, the amount of hot water heated can be controlled by the number of remaining heating tanks. This helps to avoid the problem of wasting resources due to heating more hot water than needed, and thus can reduce heating costs.

[0101] Optionally, the control method for the circulating heat pump water heating system provided in this embodiment further includes: updating the number of remaining heating water tanks when the conditions for updating the number of remaining heating water tanks are met.

[0102] The conditions for updating the number of remaining heating water tanks can be either reaching a predetermined update time or receiving an update instruction from the user.

[0103] In the above technical solution, since the number of remaining heating water tanks is updated when the conditions for updating the number of remaining heating water tanks are met, the number of remaining heating water tanks can be automatically updated, which makes it easier to control the amount of hot water heated by the system based on the number of remaining heating water tanks.

[0104] Optionally, the conditions for updating the number of remaining heating water tanks include reaching a predetermined update time and / or receiving an update instruction from the target user. This embodiment does not limit the content of the conditions for updating the number of remaining heating water tanks.

[0105] In one example, reaching the preset update time includes reaching the start time of the first time period. For instance, if the first time period is from 23:00 to 7:00 the next day, then the update condition for the number of remaining heating water tanks includes reaching 23:00 each day. This facilitates the planning of the system's heating.

[0106] Optionally, update the number of remaining heating water tanks, including updating the number of remaining heating water tanks based on the system's operating mode.

[0107] The operating mode is preset by the user and stored in the electronic device.

[0108] The working mode includes the preset total number of water tanks to be heated. The preset total number of water tanks to be heated may be the same or different for different working modes.

[0109] Accordingly, the remaining number of heating water tanks is updated based on the system's working mode, including: determining the total number of preset heating water tanks corresponding to the working mode as the remaining number of heating water tanks.

[0110] In one example, the operating modes include a low-level operating mode and a standard operating mode. The total number of preset water tank heaters corresponding to the low-level operating mode is less than the total number of preset water tank heaters corresponding to the standard operating mode.

[0111] In one example, the sum of the maximum water storage capacities of all the storage tanks in the system can meet the maximum daily hot water supply demand. In this case, the expected number of heating tanks is less than or equal to the number of storage tanks in the system. This allows for full utilization of the initial heating period, thereby further reducing hot water supply costs.

[0112] In actual implementation, if the sum of the maximum water storage capacity of all the water storage tanks included in the system is less than the maximum hot water supply demand for one day, the number of heating water tanks can be greater than the number of water storage tanks included in the system, which can help ensure a sufficient supply of hot water.

[0113] Optionally, the control method for the circulating heat pump water heating system further includes: detecting whether the water volume in the target hot water tank is less than a preset minimum water volume threshold; if the water volume in the target hot water tank is less than the minimum water volume threshold, the control system stops the water supply to the target hot water tank and replenishes the target hot water tank with water; after the water replenishment is completed, the target hot water tank is identified as the water tank to be heated.

[0114] The target hot water tank refers to the hot water tank that is currently supplying water to the heating pipeline.

[0115] Optionally, the minimum water volume threshold can be zero or other values ​​set by the user according to the actual situation. This embodiment does not limit the minimum water volume threshold.

[0116] In one example, during the process of replenishing water into a tank, it can be determined whether the replenishment is complete based on whether the water level in the tank has reached the expected storage level.

[0117] The expected water storage capacity is less than the maximum water storage capacity of the water tank.

[0118] Optionally, the expected water storage capacity can be determined based on the system's operating mode. Different operating modes may correspond to the same or different expected water storage capacities, which facilitates adjusting the water tank's storage capacity based on the operating mode. In actual implementation, the expected water storage capacity can also be preset; this embodiment does not limit the method for determining the expected water storage capacity.

[0119] In one example, the expected water storage capacity is represented by the water level in the storage tank.

[0120] In actual implementation, it is also possible to determine whether water replenishment is complete based on whether the water replenishment time has reached the preset water replenishment time threshold. This embodiment does not limit the method of determining whether water replenishment is complete.

[0121] In the above technical solution, when the water volume in the target hot water tank is less than the minimum water volume threshold, the water supply to the target hot water tank is stopped, and after the target hot water tank is replenished, the target heating tank is designated as the water tank to be heated. This makes it easier for the control system to heat the water in the water tank to be heated within the planned time period, thereby improving the stability of the operation of the circulating heat pump water heating system.

[0122] Optionally, the control method for the circulating heat pump water heating system further includes: determining the remaining water supply demand when there is only one hot water supply tank; and outputting an alarm prompt and / or heating the water in the target hot water tank when the remaining water supply demand is greater than the remaining water supply of the hot water supply tank.

[0123] The remaining water supply demand can be determined based on the target water supply and the water supply already supplied corresponding to the system's working mode, or it can be determined based on the remaining heating cycles, or it can be determined based on historical water supply. This embodiment does not limit the method of determining the remaining water supply demand.

[0124] The target water supply for each operating mode can be determined based on the number of heating water tanks and / or the expected water storage capacity corresponding to that operating mode, or it can be set separately. This embodiment does not limit the method for determining the target water supply for each operating mode. Different operating modes correspond to different target water supply volumes.

[0125] In one example, the operating modes include a low-level operating mode and a standard operating mode, where the target water supply for the low-level operating mode is less than the target water supply for the standard operating mode.

[0126] It should be noted that when the remaining water supply demand is greater than the remaining water supply of the hot water tank, the system can directly control the water in the target water tank to be heated, without considering whether the current time period is the first target time period. In this way, the system can promptly control the heating to supplement hot water when the remaining hot water supply is about to be insufficient.

[0127] In the above technical solution, when the remaining water supply demand exceeds the remaining water supply capacity of the water tank, the control system outputs an alarm and / or heats the water in the target water tank. This can prompt the user to take action and / or the control system to heat the water when the remaining water supply capacity of the hot water tank is about to be insufficient, thereby helping to ensure a stable hot water supply and improve the reliability of the circulating heat pump water heating system.

[0128] Optionally, before the control system heats the water in the target water tank, it further includes: determining whether the water temperature in the hot water supply tank is greater than a preset minimum heating temperature threshold; if the water temperature in the hot water supply tank is greater than or equal to the minimum heating temperature threshold, the control system heats the water in the target water tank; if the water temperature in the hot water supply tank is less than the minimum heating temperature threshold, the control system heats the water in the hot water supply tank.

[0129] The minimum heating temperature threshold is pre-stored in the electronic device and can be preset by the user according to the actual situation.

[0130] In one example, there are two or more hot water tanks. In this case, determining whether the water temperature in the hot water tank is greater than the preset minimum heating temperature threshold includes: determining whether the water temperature in each hot water tank is greater than the preset minimum temperature threshold.

[0131] In the above technical solution, before the system heats the water in the target water tank, it determines whether the water temperature in the hot water supply tank is lower than the preset minimum heating temperature threshold. If the water temperature in the hot water supply tank is determined to be lower than the minimum temperature threshold, the control system heats the water in the hot water supply tank. This helps to ensure the water temperature in the hot water supply tank, thereby helping to ensure the heating temperature of the system and improving the reliability of the circulating heat pump water heating system.

[0132] In practice, the heating system can also be controlled by manual intervention, which makes it easier to manually adjust the system's heating to meet the user's expectations.

[0133] The implementation principle of the control method for a circulating heat pump water heating system provided in this application embodiment is as follows: When a first target time period is reached, it is determined whether a target water tank to be heated exists; the heating cost of the first target time period is less than the heating cost of other time periods outside the first target time period; if a target water tank to be heated exists, the control system heats the water in the target water tank; once the water in the target water tank is heated, the target water tank is designated as the hot water supply tank. This solves the problem of high heating costs in circulating heat pump water heating systems due to the lack of planning for heating time. Because the existence of a target water tank to be heated is determined within the first target time period, and the water in the target water tank is heated when it exists, the required hot water can be fully stored in the storage tank within the first target time period. This helps reduce the heating demand of the system in other time periods. Since the heating cost of the first target time period is less than the heating cost of other time periods, the system can ensure the supply of hot water while fully utilizing the storage tank's capacity and time-of-use electricity pricing policies to reduce heating costs, thereby lowering the heating cost of the circulating heat pump water heating system.

[0134] Based on the above technical solution, optionally, other time periods besides the first target time period include a second target time period and a third target time period. The heating cost of the second target time period is lower than the heating cost of the third target time period. In this case, refer to... Figure 4 The control method for a circulating heat pump water heating system also includes the following steps:

[0135] Step 401: During the second target time period, determine whether to heat water based on the number of remaining heating water tanks.

[0136] In one example, a day can be divided into off-peak, flat-price, and peak periods based on different electricity prices. The electricity price during off-peak periods is lower than that during flat-price periods, and the electricity price during flat-price periods is lower than that during peak periods. In this case, the first target period is the off-peak period, the second target period is the flat-price period, and the third period is the peak period. Since the electricity price during flat-price periods is lower than that during peak periods, the heating cost during the second target period is lower than the heating cost during the third period.

[0137] In one example, determining whether to heat water based on the number of remaining heating tanks includes: determining whether the number of remaining heating tanks is greater than 0; if so, determining to heat water; otherwise, determining not to heat water.

[0138] Step 402: If heating is determined, determine whether a water tank to be heated exists.

[0139] Step 403: If a water tank to be heated exists, the control system heats the water in the target water tank.

[0140] Step 404: If the water in the target water tank to be heated is heated, the target water tank to be heated is identified as the hot water supply tank, the number of remaining water tanks is reduced by one, and the process returns to the step of determining whether to heat water based on the number of remaining water tanks within the second target time period, that is, returning to the execution of step 401.

[0141] The implementation methods of steps 402 to 404 are the same as those of steps 301 to 303 above, and will not be repeated here.

[0142] In the above technical solution, since heating is determined based on the number of remaining heating tanks during the second target time period, and the water in the target heating tank is heated when heating is determined and there is a target heating tank, the required hot water can be fully stored in the storage tank during the second target time period. This helps to reduce the heating demand of the system during the third target time period. The heating cost during the second target time period is less than the heating cost during the third target time period. Thus, while ensuring the supply of hot water, the volume of the storage tank and the time-of-use electricity pricing policy can be fully utilized to reduce heating costs, thereby reducing the heating cost of the circulating heat pump water heating system.

[0143] Generally, there are parity periods between low and high price periods. In this case, based on the adjacency relationship between the parity periods and the low price periods, the parity periods can be divided into adjacent parity periods that are adjacent to the low price periods and interval parity periods that are not adjacent to the low price periods. Furthermore, adjacent parity periods can be divided into preceding adjacent parity periods that are before the low price periods and following adjacent parity periods that are after the low price periods.

[0144] In one example, the off-peak period is from 23:00 to 7:00 the next day; the parity period is from 7:00 to 8:30, 11:30 to 14:30, 17:30 to 19:00, and 21:00 to 23:00; the peak period is from 8:30 to 11:30, 14:30 to 17:30, and 19:00 to 21:00. In this case, within the parity period, adjacent parity periods are from 7:00 to 8:30 and from 21:00 to 23:00, and the intervals between parity periods are from 11:30 to 14:30 and from 17:30 to 19:00.

[0145] Optionally, the second target time period includes the next adjacent second target time period. In this case, if the second target time period is reached, it is determined whether to heat water based on the number of remaining heating water tanks, including: if the next adjacent second target time period is reached, it is determined whether to heat water based on the number of remaining heating water tanks.

[0146] The next adjacent second target time period refers to the time period in the second target time period that is adjacent to the first target time period and is located after the first target time period.

[0147] The second duration threshold refers to the sum of the lengths of the first target time period and the adjacent second target time period.

[0148] In one example, the next adjacent second target time period is the parity time period that is adjacent to the trough time period and located after the trough time period, i.e., the aforementioned next adjacent parity time period.

[0149] Since the longer the heating source continues to heat, the lower the heating cost, it is possible to determine whether to heat based on the number of remaining heating tanks after the second target time period is reached. This allows for continuous heating in both the first target time period and the second target time period, thus reducing heating costs while ensuring the supply of hot water and thereby lowering the heating cost of the circulating heat pump water heating system.

[0150] Optionally, the second target time includes nighttime and non-nighttime periods. In this case, when the second target time period is reached, it is determined whether to heat water based on the number of remaining heating tanks, including: when the nighttime period is reached, determining the expected heating duration based on the working mode and the amount of remaining hot water; determining whether the expected heating duration is greater than a preset heating duration threshold; and if the expected heating duration is greater than the heating duration threshold, determining whether to heat water based on the number of remaining heating tanks.

[0151] The heating duration threshold is determined based on the duration of the first target time period and the non-nighttime period. In one example, the heating duration threshold is the sum of the durations of the first target time period and the non-nighttime period.

[0152] The remaining hot water volume refers to the sum of the water volume in all hot water supply tanks.

[0153] In one example, the second target time period includes four time periods: 7:00 to 8:30, 11:30 to 14:30, 17:30 to 19:00, and 21:00 to 23:00 daily. In this case, 7:00 to 8:30, 11:30 to 14:30, and 17:30 to 19:00 are non-nighttime periods, while 21:00 to 23:00 is the nighttime period.

[0154] In practice, the nighttime and non-nighttime periods can be divided based on the actual situation of the system deployment location, and this embodiment does not limit this.

[0155] Since the nighttime temperature is lower than the daytime temperature, the system consumes more resources for heating at night. Therefore, heating is only determined based on the number of remaining heating tanks when the expected heating time exceeds the heating time threshold. This can reduce the nighttime heating time and thus help reduce the heating cost of the circulating heat pump water heating system.

[0156] Optionally, the expected heating time is determined based on the working mode and the remaining hot water volume, including: determining the expected heating water volume by the difference between the target water supply volume corresponding to the working mode and the remaining hot water volume; and determining the expected heating time based on the expected heating water volume and the heating time per unit water volume.

[0157] The reference unit water volume heating time can be determined based on historical heating water volume and heating time, such as the heating water volume and heating time of the previous day, or it can be preset according to current environmental information, such as by month, or it can be determined in other ways. This embodiment does not limit the method of determining the reference unit water volume.

[0158] In one example, the reference unit water volume heating time is determined based on the heating water volume and heating time of the previous day. Since the temperature difference between the previous day and the current day is usually small, the difference in the unit water volume heating time of the heat pump unit is not large, which can improve the accuracy of the reference unit water volume heating time.

[0159] Optionally, the expected heating time is determined based on the expected heating water volume and the heating time per unit water volume, including: determining the expected heating time by multiplying the expected heating water volume by the heating time per unit water volume.

[0160] This application also provides an electronic device, which can be used for... Figure 1 The control module of the circulating heat pump water heating system shown is as follows: Figure 6 As shown, Figure 6 The illustrated electronic device 600 includes a processor 601 and a memory 603. The processor 601 and the memory 603 are connected, for example, via a bus 602. Optionally, the electronic device 600 may also include a transceiver 604. It should be noted that in practical applications, the transceiver 604 is not limited to one type, and the structure of this electronic device 600 does not constitute a limitation on the embodiments of this application.

[0161] Processor 601 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 601 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0162] Bus 602 may include a pathway for transmitting information between the aforementioned components. Bus 602 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 602 can be divided into address bus, data bus, control bus, etc. For ease of representation... Figure 6 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0163] The memory 603 may be a ROM (Read Only Memory) or other type of static storage device capable of storing static information and instructions, RAM (Random Access Memory) or other type of dynamic storage device capable of storing information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.

[0164] The memory 603 stores application code that executes the scheme of this application, and its execution is controlled by the processor 601. The processor 601 executes the application code stored in the memory 603 to implement the content shown in the foregoing method embodiments.

[0165] Electronic devices include, but are not limited to: mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), and in-vehicle terminals (such as in-vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Servers can also be included. Figure 6 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0166] This application also provides a computer-readable storage medium storing a computer program thereon. When the computer program is executed in a computer, it causes the computer to execute the control method of the circulating heat pump water heating system provided in the above embodiments.

[0167] It should be understood that although the steps in the flowcharts in the accompanying drawings are shown sequentially as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise expressly stated herein, there is no strict order in which these steps are performed, and they may be performed in other orders.

[0168] The above are only some embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A control method for a circulating heat pump water heating system, characterized in that, The system has two or more water storage tanks, and the method includes: Within the first target time period, determine whether there is a water tank to be heated; the heating cost during the first target time period is less than the heating cost during other time periods outside the first target time period; In the presence of the water tank to be heated, the system is controlled to heat the water in the target water tank. Once the water in the target water tank to be heated has been heated, the target water tank to be heated is designated as a hot water supply tank. The process further includes, once the water in the target water tank has been heated, including: The number of remaining heated water tanks is reduced by one, whereby the number of remaining heated water tanks indicates the number of remaining water tanks that need to be heated; Whether to continue heating is determined based on the number of remaining heating water tanks; If it is determined that heating should continue, return to the step of determining whether there is a water tank to be heated within the first target time period; The other time periods include a second target time period and a third target time period, wherein the heating cost of the second target time period is lower than the heating cost of the third target time period, and the method further includes: During the second target time period, it is determined whether to perform heating based on the number of remaining heating water tanks; If heating is determined to be performed, determine whether the water tank to be heated exists; In the presence of the water tank to be heated, the system is controlled to heat the water in the target water tank. If the water in the target water tank to be heated is heated, the target water tank to be heated is identified as the hot water supply tank, the number of remaining water tanks is reduced by one, and the process returns to the step of determining whether to heat water based on the number of remaining water tanks within the second target time period. The second target time period includes the next adjacent second target time period. When the second target time period is reached, it is determined whether to heat water based on the number of remaining heating water tanks. This includes: when the next adjacent second target time period is reached, it is determined whether to heat water based on the number of remaining heating water tanks. The next adjacent second target time period is the time period in the second target time period that is adjacent to the first target time period and is located after the first target time period. The second target time period includes nighttime and non-nighttime periods. Determining whether to heat water within the second target time period based on the remaining number of heating tanks includes: When the nighttime period is reached, the expected heating time is determined based on the working mode and the remaining hot water volume. The working mode includes a low-level operation mode and a standard operation mode. The total number of preset water tanks to be heated in the low-level operation mode is less than the total number of preset water tanks to be heated in the standard operation mode. Determine whether the expected heating time is greater than a preset heating time threshold, wherein the heating time threshold is the sum of the duration of the first target time period and the duration of the non-nighttime period; If the expected heating time exceeds the heating time threshold, it is determined whether to perform heating based on the number of remaining heating water tanks.

2. The method according to claim 1, characterized in that, The method further includes: If the conditions for updating the number of remaining heating water tanks are met, update the number of remaining heating water tanks.

3. The method according to claim 1, characterized in that, The method further includes: The system detects whether the water volume in the target hot water tank is less than the preset minimum water volume threshold. If the water volume in the target hot water tank is less than the minimum water volume threshold, the control system stops the water supply to the target hot water tank and replenishes the target hot water tank with water. After the water replenishment is completed, the target hot water tank is designated as the water tank to be heated.

4. The method according to claim 1, characterized in that, The method further includes: Determine the remaining water supply demand if there is only one hot water tank. If the remaining water supply demand exceeds the remaining water supply capacity of the hot water tank, the control system outputs an alarm and / or heats the water in the target hot water tank.

5. The method according to claim 1, characterized in that, Before the system heats the water in the target water tank, the method further includes: Determine whether the water temperature in the hot water tank is lower than the preset minimum heating temperature threshold. If the water temperature in the hot water tank is lower than the minimum heating temperature threshold, the system is controlled to heat the water in the hot water tank.

6. A circulating heat pump hot water system, characterized in that, The circulating heat pump water heating system includes a water tank module (110), a heating module (120), a circulating pump (130), and a control module; the water tank module (110) includes at least two. The water tank module (110) includes a water storage tank (111), a first inlet (112), a second inlet (113), a first outlet (114) and a second outlet (115), a first control valve (116), a second control valve (117), a third control valve (118), a fourth control valve (119), a temperature monitoring component (141), and a water level monitoring component (142); the first inlet (112), the second inlet (113), the first outlet (114), and the second outlet (115) are disposed on the water storage tank (111); The heating module (120) includes a third water inlet (121), a heating source (122), and a third water outlet (123). The third water inlet (121) is connected to the third water outlet (123) through the heating source (122). The first water inlet (112) is connected to an external water supply pipe through the first control valve (116); the first water outlet (114) is connected to the third water inlet (121) in sequence through the second control valve (117) and the circulating pump (130); the third water outlet (123) is connected to the second water inlet (113) through the third control valve (118); the second water outlet (115) is connected to the hot water supply pipe through the fourth control valve (119); The heating source (122), the first control valve (116), the second control valve (117), the third control valve (118), the fourth control valve (119), the circulating pump (130), the temperature monitoring component (141), and the water level monitoring component (142) are respectively connected to the control module via signal connection; The control module is used to execute the control method of the circulating heat pump water heating system according to any one of claims 1 to 5.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed in the computer, it causes the computer to perform the control method of the circulating heat pump water heating system according to any one of claims 1 to 5.

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