Hot water system and control method thereof, and computer readable storage medium

Abstract

The application discloses a hot water system, a control method thereof, and a computer readable storage medium. The control method of the hot water system comprises the following steps: presetting a first starting condition, a second starting condition and a third starting condition; determining whether a third heat storage water tank meets a target heat storage water requirement according to a third heat storage water tank temperature; if the third heat storage water tank does not meet the target heat storage water requirement, controlling a cycle control component to start next time when the hot water system meets the first starting condition and the second starting condition; and if the third heat storage water tank meets the target heat storage water requirement, controlling the cycle control component to start next time when the hot water system meets the first starting condition, the second starting condition and the third starting condition. According to the control method of the hot water system, the multiple heat storage water tanks can be basically filled with hot water.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of closed pressure hot water system, in particular to a hot water system, a control method thereof and a computer readable storage medium. BACKGROUND

[0002] The hot water system comprises a heat pump, a heating water tank and a heat storage water tank, and is a hot water supply system capable of heating domestic water.

[0003] In the related art, the hot water system can comprise multiple heat storage water tanks, but the circulation heating control scheme adopted in the related art often causes individual heat storage water tanks in the multiple heat storage water tanks to be unable to store hot water, and cannot actually meet a large amount of hot water demand. SUMMARY

[0004] The present application provides a hot water system, a control method thereof and a computer readable storage medium, and multiple heat storage water tanks can basically store hot water.

[0005] In a first aspect, the present application provides a hot water system control method, which is used for a hot water system, and the hot water system comprises a heating water tank, a first heat storage water tank, a second heat storage water tank, a third heat storage water tank, a circulation pipeline and a circulation control assembly. The second heat storage water tank is connected between the first heat storage water tank and the third heat storage water tank. The upper part of the heating water tank is connected to the first heat storage water tank. The circulation pipeline connects the third heat storage water tank and the heating water tank. The circulation control assembly is arranged on the circulation pipeline. When the circulation control assembly is turned on, the circulation pipeline inputs circulating water to the heating water tank. When the circulation control assembly is turned off, the circulation pipeline stops inputting the circulating water to the heating water tank. The hot water system control method comprises the following steps: presetting a first opening condition, a second opening condition and a third opening condition. The first opening condition is that the temperature difference between the upper part of the heating water tank and the temperature of the first heat storage water tank is greater than or equal to a first preset temperature difference. The second opening condition is that the temperature of the upper part of the heating water tank is greater than or equal to a first preset temperature value. The third opening condition is that the temperature of the second heat storage water tank is less than or equal to a second preset temperature value. Whether the third heat storage water tank meets a target heat storage water requirement is determined according to the temperature of the third heat storage water tank. If the third heat storage water tank does not meet the target heat storage water requirement, the circulation control assembly is controlled to be turned on next time when the hot water system meets the first opening condition and the second opening condition. If the third heat storage water tank has met the target heat storage water requirement, the circulation control assembly is controlled to be turned on next time when the hot water system meets the first opening condition, the second opening condition and the third opening condition.

[0006] According to the aforementioned embodiment of the first aspect of the present invention, the hot water system control method further includes: presetting a first closing condition, a second closing condition and a third closing condition, the first closing condition being that the temperature difference between the upper temperature of the heating water tank and the temperature of the first hot water storage tank is less than a second preset temperature difference, the second closing condition being that the upper temperature of the heating water tank is less than a third preset temperature value, and the third closing condition being that the temperature of the third hot water storage tank is greater than a fourth preset temperature value; if the hot water system satisfies the first closing condition and / or the second closing condition, and does not satisfy the third closing condition, the circulation control component is controlled to be closed, and the circulation control component is controlled to be opened next time when the hot water system simultaneously satisfies the first opening condition and the second opening condition; if the hot water system satisfies the third closing condition, the circulation control component is controlled to be closed, and the circulation control component is controlled to be opened next time when the hot water system simultaneously satisfies the first opening condition, the second opening condition and the third opening condition.

[0007] According to the aforementioned embodiment of the first aspect of the present invention, the hot water system also includes a first temperature sensor arranged on the upper part of the heating water tank, and the first temperature sensor can detect the heating water tank to obtain a first detection temperature. In the first opening condition, the second opening condition, the first closing condition, and the second closing condition, the first detection temperature is used as the upper temperature of the heating water tank.

[0008] According to any of the aforementioned embodiments of the first aspect of the present invention, the hot water system also includes a second temperature sensor arranged at the lower part of the heating water tank, and the second temperature sensor can detect the heating water tank to obtain a second detection temperature. In the first opening condition, the second opening condition, the first closing condition, and the second closing condition, the upper temperature of the heating water tank is obtained by adding the second detection temperature to a third preset temperature difference.

[0009] According to any of the aforementioned embodiments of the first aspect of the present invention, the third preset temperature difference is in the range of 4 degrees Celsius to 6 degrees Celsius.

[0010] According to any of the aforementioned embodiments of the first aspect of the present invention, the hot water system control method further includes: performing a temperature sensing fault self-check on the second temperature sensor after the circulation control component is continuously turned on for a first preset time period.

[0011] According to any of the aforementioned embodiments of the first aspect of the present invention, the hot water system also includes a heat pump, a heat pump water inlet pipe and a heat pump water outlet pipe, the heat pump water inlet pipe and the heat pump water outlet pipe are both connected between the heat pump and the heating water tank, the heat pump water inlet pipe is connected to the lower part of the heating water tank, and the self-test of the temperature sensing fault of the second temperature sensor includes: if the temperature difference between the second detection temperature and the inlet temperature of the liquid in the heat pump water inlet pipe is less than or equal to a fourth preset temperature difference for a second consecutive preset time, it is determined that the temperature sensing of the second temperature sensor is normal; if the temperature difference between the second detection temperature and the inlet temperature of the liquid in the heat pump water inlet pipe is greater than the fourth preset temperature difference for a second consecutive preset time, it is determined that the second temperature sensor has a temperature sensing fault.

[0012] According to any of the aforementioned embodiments of the first aspect of the present invention, the second preset time length is set to be greater than 4 seconds; and the fourth preset temperature difference is set to be within 3 degrees Celsius.

[0013] According to any of the aforementioned embodiments of the first aspect of the present invention, the hot water system also includes a first temperature sensor arranged on the upper part of the heating water tank, and the first temperature sensor can detect the heating water tank to obtain a first detection temperature. After determining that the temperature sensing of the second temperature sensor is normal, the hot water system control method also includes: performing a temperature sensing fault self-test on the first temperature sensor, wherein, if the first detection temperature is less than the difference between the second detection temperature and the fifth preset temperature value, it is determined that the first temperature sensor has a temperature sensing fault.

[0014] According to any of the aforementioned implementations of the first aspect of the present invention, the value of the first preset time length is greater than 120 seconds.

[0015] According to any of the aforementioned embodiments of the first aspect of the present invention, the hot water system has a set temperature that can accept a setting, wherein the first preset temperature value is obtained by subtracting a first hysteresis value from the preset temperature; the second preset temperature value is obtained by subtracting a second hysteresis value from the preset temperature; the third preset temperature value is obtained by subtracting a third hysteresis value from the preset temperature; and the fourth preset temperature value is obtained by subtracting a fourth hysteresis value from the preset temperature.

[0016] In a second aspect, an embodiment of the present invention provides a hot water system, which includes a controller, the controller including a memory and at least one processor, the memory storing instructions, and the at least one processor calling the instructions in the memory so that the controller executes the hot water system control method according to any of the aforementioned embodiments of the first aspect of the present invention.

[0017] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having instructions stored thereon, which, when executed by a processor, implements a hot water system control method according to any of the aforementioned embodiments of the first aspect of the present invention.

[0018] According to an embodiment of the present invention, a hot water system control method comprises a second hot water storage tank connected between a first hot water storage tank and a third hot water storage tank. The third hot water storage tank is, for example, the last stage of a multi-stage hot water storage tank. Whether the third hot water storage tank meets a target hot water storage requirement is determined based on the temperature of the third hot water storage tank. After the third hot water storage tank meets the target hot water storage requirement, the next activation of the circulation control component requires that the first, second, and third activation conditions are simultaneously met. If the third hot water storage tank does not meet the target hot water storage requirement, the hot water system can be activated by simultaneously meeting the first and second activation conditions, without satisfying the third activation condition. This allows the circulation control component to be activated again if the third hot water storage tank is not yet fully filled with hot water and the circulation control component is already closed. This allows the circulation control component to be activated again, thereby circulating water into the heating water tank. The heated water continues to replenish the third hot water storage tank, ensuring that the third hot water storage tank is also fully filled with hot water. According to this solution, when the third hot water storage tank is the last stage of a multi-stage hot water storage tank, all the hot water storage tanks can be substantially fully filled with hot water, improving the utilization rate of the hot water storage tanks and facilitating the meeting of large-scale hot water demand. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 This is a schematic structural diagram of an embodiment of a hot water system of the present invention;

[0021] Figure 2 This is a flow chart of an embodiment of a hot water system control method of the present invention;

[0022] Figure 3 It is a structural schematic diagram of an alternative embodiment of the hot water system of the present invention;

[0023] Figure 4 Schematic diagram of the hardware structure of a controller in an embodiment of a hot water system of the present invention.

[0024] Description of reference numerals:

[0025] 110-heating water tank;

[0026] 121-first hot water storage tank, 122-second hot water storage tank, 123-third hot water storage tank;

[0027] 130-circulation pipeline;

[0028] 140-circulation control assembly; 141-water valve; 142-water pump;

[0029] 150-heat pump; 151-heat pump water inlet pipe; 152-heat pump water outlet pipe;

[0030] 160-water supply pipeline;

[0031] 171 - first temperature sensor; 172 - second temperature sensor;

[0032] 181 - first heat storage temperature sensor; 182 - second heat storage temperature sensor; 183 - third heat storage temperature sensor;

[0033] 190-water supply pipeline;

[0034] 191 - memory; 192 - processor; 193 - communication interface; 194 - bus.

[0035] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the descriptions involving "first", "second" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0039] The embodiment of the present application provides a hot water system control method, which is used for a hot water system.

[0040] Figure 1 The structure diagram of an embodiment of the hot water system of the present application. The hot water system is, for example, a closed pressure-bearing hot water system. The hot water system comprises a heating water tank 110, a first heat storage water tank 121, a second heat storage water tank 122, a third heat storage water tank 123, a circulating pipeline 130 and a circulating control assembly 140.

[0041] The second heat storage water tank 122 is communicated between the first heat storage water tank 121 and the third heat storage water tank 123. The upper part of the heating water tank 110 is communicated with the first heat storage water tank 121. The circulating pipeline 130 communicates the third heat storage water tank 123 with the heating water tank 110, and the circulating control assembly 140 is arranged on the circulating pipeline 130. When the circulating control assembly 140 is opened, the circulating pipeline 130 inputs circulating water to the heating water tank 110, and when the circulating control assembly 140 is closed, the circulating pipeline 130 stops inputting circulating water to the heating water tank 110.

[0042] In some embodiments, other heat storage water tanks can be connected between the first heat storage water tank 121 and the second heat storage water tank 122. In some embodiments, other heat storage water tanks can also be connected between the second heat storage water tank 122 and the third heat storage water tank 123. That is, the number of heat storage water tanks connected in sequence in the hot water system is not limited to three, but can also be four, five, six, or other numbers. In addition, when the hot water system includes a plurality of heat storage water tanks connected in sequence, the first heat storage water tank 121 can be the heat storage water tank closest to the heating water tank 110 in the heat storage water tank connection structure, the third heat storage water tank 123 can be the heat storage water tank farthest from the heating water tank 110 in the heat storage water tank connection structure, and the second heat storage water tank 122 can be the heat storage water tank arranged in the middle in the heat storage water tank connection structure. When the heat storage water tank connection structure of the hot water system includes an odd number of heat storage water tanks, the data of the heat storage water tank in the middle of the heat storage water tank connection structure can be taken as the data of the second heat storage water tank 122, and when the heat storage water tank connection structure of the hot water system includes an even number of heat storage water tanks, the average of the data of the two heat storage water tanks in the middle of the heat storage water tank connection structure can be taken as the data of the second heat storage water tank 122.

[0043] The hot water system can also include a water replenishment pipeline 190 in communication with the third heat storage water tank 123, capable of replenishing water to the third heat storage water tank 123. In some embodiments, the water replenishment pipeline 190 can be connected to an external water source or a user end return water end.

[0044] In some embodiments, the hot water system further includes a heat pump 150, a heat pump water inlet pipeline 151, and a heat pump water outlet pipeline 152, both of which are connected between the heat pump 150 and the heating water tank 110, and the heat pump water inlet pipeline 151 is connected to the lower part of the heating water tank 110. The heat pump 150 is in communication with the heating water tank 110, for example, through two pipelines. The hot water system can also include a water supply pipeline 160 in communication with the upper part of the heating water tank 110 and the first heat storage water tank 121, so that the heating water tank 110 and / or the first heat storage water tank 121 can supply hot water externally via the water supply pipeline 160.

[0045] In some embodiments, the circulation control assembly 140 includes a water passing valve 141 and a water passing pump 142. When the water passing valve 141 and the water passing pump 142 are opened, the circulation control assembly 140 is opened, and when the water passing valve 141 and the water passing pump 142 are closed, the circulation control assembly 140 is closed.

[0046] Figure 2 A flowchart of an embodiment of the hot water system control method of the present application. The hot water system control method can include steps S110 to S140.

[0047] In step S110, a first activation condition, a second activation condition, and a third activation condition are preset. The first activation condition is that the temperature difference between the upper portion of the heating water tank 110 and the temperature of the first hot water storage tank 121 is greater than or equal to a first preset temperature difference. The second activation condition is that the upper portion of the heating water tank 110 is greater than or equal to a first preset temperature value. The third activation condition is that the temperature of the second hot water storage tank 122 is less than or equal to a second preset temperature value.

[0048] In the above embodiment, the first preset temperature difference is the allowable water flow temperature difference. The hot water system has a set temperature that can be set. The first preset temperature value is obtained by subtracting the first hysteresis value from the preset temperature. Specifically, the first preset temperature value is obtained by subtracting the hysteresis value of the upper part of the water tank, which allows water flow. The second preset temperature value is obtained by subtracting the second hysteresis value from the preset temperature. Specifically, the second preset temperature value is obtained by subtracting the hysteresis value of the middle part of the water tank, which allows water flow. In one example, the first preset temperature difference is 2°C, the first hysteresis value is 3°C, and the second hysteresis value is 5°C.

[0049] In step S120, a determination is made based on the temperature of the third hot water storage tank to determine whether the third hot water storage tank meets the target hot water storage requirement. In one example, determining whether the third hot water storage tank meets the target hot water storage requirement based on the temperature of the third hot water storage tank may be as follows: if the temperature of the third hot water storage tank is greater than a fourth preset temperature value, the third hot water storage tank has met the target hot water storage requirement; and if the temperature of the third hot water storage tank is less than or equal to the fourth preset temperature value, the third hot water storage tank has not met the target hot water storage requirement. In some embodiments, the hot water system has an acceptable set temperature, and the fourth preset temperature value is obtained by subtracting a fourth differential value from the preset temperature. For example, the fourth differential value is 3°C.

[0050] In step S130, if the third hot water storage tank does not meet the target hot water storage requirement, the circulation control component is controlled to start next time when the hot water system meets both the first start condition and the second start condition.

[0051] In step S140, if the third hot water storage tank has met the target hot water storage requirement, the circulation control component is controlled to start next time when the hot water system meets the first start condition, the second start condition and the third start condition at the same time.

[0052] According to an embodiment of the hot water system control method of the present invention, the second hot water storage tank 122 is connected between the first hot water storage tank 121 and the third hot water storage tank 123. The third hot water storage tank 123 is, for example, the last stage of a multi-stage hot water storage tank. Whether the third hot water storage tank 123 meets the target hot water storage requirement is determined based on the temperature of the third hot water storage tank 123. After the third hot water storage tank 123 meets the target hot water storage requirement, the next activation of the circulation control component 140 must simultaneously meet the first activation condition, the second activation condition, and the third activation condition. If the third hot water storage tank 123 does not meet the target hot water storage requirement, the hot water system can be activated by simultaneously meeting the first activation condition and the second activation condition when determining whether to activate the circulation control component 140 next time. This allows the circulation control component 140 to be activated again if it is already closed when the third hot water storage tank 123 is not yet fully filled with hot water, thereby circulating water to the heating water tank 110. The heated water continues to replenish the third hot water storage tank 123, ensuring that the third hot water storage tank 123 is also fully filled with hot water. According to the above solution, when the third heat storage tank 123 is the last stage of the multi-stage heat storage tank, multiple heat storage tanks can be basically filled with hot water, thereby improving the utilization rate of the heat storage tanks and meeting the demand for large amounts of hot water.

[0053] In some embodiments, the hot water system control method may further include the following steps:

[0054] A first shut-off condition, a second shut-off condition, and a third shut-off condition are preset. The first shut-off condition is that the temperature difference between the upper portion of the heating water tank 110 and the temperature of the first hot water storage tank 121 is less than a second preset temperature difference. The second shut-off condition is that the upper portion of the heating water tank 110 is less than a third preset temperature value. The third shut-off condition is that the temperature of the third hot water storage tank 123 is greater than a fourth preset temperature value. There is no order restriction between the steps of presetting the first, second, and third shut-off conditions and step S110.

[0055] If the hot water system satisfies the first closing condition and / or the second closing condition and does not satisfy the third closing condition, the control circulation control component 140 is closed, and when the hot water system satisfies the first opening condition and the second opening condition at the same time, the control circulation control component 140 is opened next time.

[0056] If the hot water system meets the third closing condition, the circulation control component 140 is controlled to be closed, and if the hot water system meets the first opening condition, the second opening condition and the third opening condition at the same time, the circulation control component 140 is controlled to be opened next time.

[0057] During operation of the hot water system, the circulation control component 140 is opened and closed cyclically according to the above opening and closing conditions.

[0058] According to the hot water system control method in the above embodiment, the second heat storage water tank 122 is connected between the first heat storage water tank 121 and the third heat storage water tank 123, and the third heat storage water tank 123 is, for example, the last stage of the multi-stage heat storage water tank. When judging whether the circulation control component 140 is closed, if the first closing condition and / or the second closing condition are met and the third closing condition is not met, the circulation control component 140 is controlled to be closed, and when judging whether the circulation control component 140 is opened next time, the hot water system does not need to meet the third opening condition. In this way, when the second heat storage water tank 122 stores part of the hot water and the third heat storage water tank 123 has not been filled with hot water, the circulation control component 140 can still be opened, so that the circulating water is input into the heating water tank 110, and the heated water continues to supplement the third heat storage water tank 123, so that the third heat storage water tank 123 can also be filled with hot water. When judging whether the circulation control component 140 is closed, if the hot water system meets the third closing condition, it indicates that the third heat storage water tank 123 has been filled with hot water, and the circulation control component 140 is controlled to be closed, and when judging whether the circulation control component 140 is opened next time, the hot water system needs to meet the first opening condition, the second opening condition and the third opening condition at the same time. According to the above scheme, when the third heat storage water tank 123 is the last stage of the multi-stage heat storage water tank, it means that the plurality of heat storage water tanks can be basically filled with hot water, so that the utilization rate of the heat storage water tank is improved, and the demand for a large amount of hot water can be met. According to the hot water system control method in the embodiment of the present application, the timeliness and accuracy of inputting the circulating water into the heating water tank 110 can be ensured, so that the comfort and stability of the user's water use can be ensured.

[0059] As Figure 1 In some embodiments, the hot water system further comprises a first temperature sensor 171 arranged at the upper portion of the heating water tank 110, and the first temperature sensor 171 can detect a first detection temperature of the heating water tank 110. In the hot water system control method, the first detection temperature is taken as the upper portion temperature of the heating water tank 110 in the first opening condition, the second opening condition, the first closing condition and the second closing condition. Optionally, the heating water tank 110 comprises a hot water outlet at the upper portion of the heating water tank 110, and the hot water outlet is connected with the first heat storage water tank 121 and the water supply pipeline 160. The first temperature sensor 171 can be arranged at the hot water outlet, so that the first detection temperature basically represents the hot water outlet temperature of the heating water tank 110.

[0060] In the above embodiment, the first preset temperature difference is the allowed overwater temperature difference, and the second preset temperature difference is the stop overwater temperature difference.

[0061] In some embodiments, the hot water system has a set temperature that can be set. The first preset temperature value is obtained by subtracting the first hysteresis value from the preset temperature. Specifically, the first preset temperature value is obtained by subtracting the hysteresis value of the upper part of the water tank that allows water to flow from the preset temperature. The second preset temperature value is obtained by subtracting the second hysteresis value from the preset temperature. Specifically, the second preset temperature value is obtained by subtracting the hysteresis value of the middle part of the water tank that allows water to flow from the preset temperature. The third preset temperature value is obtained by subtracting the third hysteresis value from the preset temperature. Specifically, the third preset temperature value is obtained by subtracting the hysteresis value of the upper part of the water tank that stops water flow from the preset temperature. The fourth preset temperature value is obtained by subtracting the fourth hysteresis value from the preset temperature. Specifically, the third preset temperature value is obtained by subtracting the hysteresis value of the lower part of the water tank that stops water flow from the preset temperature.

[0062] In one example, the first preset temperature difference is 2°C, the second preset temperature difference is -20°C, the first return difference value is 3°C, the second return difference value is 5°C, the third return difference value is 7°C, and the fourth return difference value is 3°C.

[0063] Figure 3 This is a schematic diagram of the structure of an alternative embodiment of a hot water system according to the present invention. The hot water system includes a heating water tank 110, a first hot water storage tank 121, a second hot water storage tank 122, a third hot water storage tank 123, a circulation pipeline 130, and a circulation control assembly 140. The second hot water storage tank 122 is connected between the first hot water storage tank 121 and the third hot water storage tank 123. The upper portion of the heating water tank 110 is connected to the first hot water storage tank 121. The circulation pipeline 130 connects the third hot water storage tank 123 and the heating water tank 110. The circulation control assembly 140 is disposed on the circulation pipeline 130. When the circulation control assembly 140 is turned on, the circulation pipeline 130 supplies circulating water to the heating water tank 110. When the circulation control assembly 140 is turned off, the circulation pipeline 130 stops supplying circulating water to the heating water tank 110.

[0064] In an alternative embodiment, the hot water system further includes a second temperature sensor 172 disposed at the lower portion of the heating water tank 110. The second temperature sensor 172 is capable of detecting the second detected temperature of the heating water tank 110. In this case, in the first on condition, the second on condition, the first off condition, and the second off condition, the upper temperature of the heating water tank 110 is obtained by adding the second detected temperature to a third preset temperature difference. This third preset temperature difference is within a range of 4 to 6 degrees Celsius. For example, under normal circumstances, the temperature difference between the upper and lower portions of the heating water tank 110 is approximately 5 degrees Celsius. In this case, the third preset temperature difference is set to 5 degrees Celsius. Accordingly, the first on condition is defined as the lower temperature of the heating water tank 110 plus 5 degrees Celsius minus the temperature of the first hot water storage tank 121, which is greater than or equal to the first preset temperature difference. The same applies to the second on condition, the first off condition, and the second off condition.

[0065] In some embodiments, the hot water system control method further includes: performing a temperature sensing fault self-test on the second temperature sensor 172 after the circulation control component 140 is continuously turned on for a first preset time period.

[0066] In some embodiments, the hot water system also includes a heat pump 150, a heat pump water inlet pipe 151 and a heat pump water outlet pipe 152. The heat pump water inlet pipe 151 and the heat pump water outlet pipe 152 are both connected between the heat pump 150 and the heating water tank 110, and the heat pump water inlet pipe 151 is connected to the lower part of the heating water tank 110.

[0067] In some embodiments, the temperature sensing fault self-test of the second temperature sensor 172 includes: if the temperature difference between the second detection temperature and the inlet temperature of the liquid in the heat pump water inlet pipe 151 is less than or equal to a fourth preset temperature difference for a second consecutive preset time period, it is determined that the second temperature sensor 172 is sensing the temperature normally; if the temperature difference between the second detection temperature and the inlet temperature of the liquid in the heat pump water inlet pipe 151 is greater than the fourth preset temperature difference for a second consecutive preset time period, it is determined that the second temperature sensor 172 has a temperature sensing fault.

[0068] In the above embodiment, the second preset time length is set to be greater than 4 seconds; and the fourth preset temperature difference is set to be within 3 degrees Celsius.

[0069] In the above embodiment, the first preset duration is set to be greater than 120 seconds.

[0070] For example, the hot water system control method includes: after the circulation control component 140 is continuously turned on for 150 seconds, the second temperature sensor 172 performs a self-test on the heating water tank 110 to detect a temperature sensing fault. Specifically, if the temperature difference between the second detected temperature and the inlet temperature of the circulating water in the circulation pipeline 130 is less than or equal to 3 degrees Celsius for 5 consecutive seconds, the heating water tank 110 is determined to be normal in terms of temperature sensing. If the temperature difference between the second detected temperature and the inlet temperature of the circulating water in the circulation pipeline 130 is greater than 3 degrees Celsius for 5 consecutive seconds, the heating water tank 110 is determined to have a temperature sensing fault.

[0071] In the above embodiment, after the circulation control assembly 140 is continuously activated for the first preset duration, the water circuit has been circulated. If the second temperature sensor 172 senses temperature normally, the second detected temperature, i.e., the temperature at the lower portion of the heating water tank 110, is close to the inlet temperature of the liquid in the heat pump inlet pipe 151. For example, the temperature difference is less than or equal to 3 degrees Celsius. If this condition is met, the second detected temperature of the second temperature sensor 172 can properly represent the temperature at the lower portion of the heating water tank 110. The second detected temperature can then be added to the third preset temperature difference to obtain the upper temperature of the heating water tank 110. If the second temperature sensor 172 is damaged, this can be detected by program detection. If the second temperature sensor 172 is dropped, the silicone grease hardens and has poor thermal conductivity, etc., the second detected temperature measured by the second temperature sensor 172 may be close to the ambient temperature, and the temperature difference between the second detected temperature and the inlet temperature of the liquid in the heat pump inlet pipe 151 may be large. Therefore, the above-described temperature sensing fault self-test step can promptly detect any temperature sensing fault in the second temperature sensor 172. When it is detected that the second temperature sensor 172 is damaged or has a temperature sensing fault, the subsequent control of the circulation control component 140 can ignore the conditions involving the temperature of the second temperature sensor 172, thereby temporarily ensuring the stable operation of the hot water system.

[0072] In some embodiments, the hot water system further includes a first temperature sensor 171 disposed on an upper portion of the heating water tank 110 . The first temperature sensor 171 can detect the heating water tank 110 to obtain a first detected temperature.

[0073] Optionally, after determining that the second temperature sensor 172 is sensing normal temperature, the hot water system control method may further include: performing a temperature sensing fault self-test on the first temperature sensor 171. If the first detected temperature is less than the difference between the second detected temperature and a fifth preset temperature value, then the first temperature sensor 171 is determined to have a temperature sensing fault. For example, the fifth preset temperature value is 3°C. If the first temperature sensor 171 is damaged, this can be detected by program detection. If the first detected temperature is less than the difference between the second detected temperature and the fifth preset temperature value, then the first temperature sensor 171 may have fallen, hardened silicone grease may have poor thermal conductivity, or the first detected temperature may not accurately represent the upper temperature of the heating water tank 110. In this case, in conditions involving the upper temperature of the heating water tank 110, such as the first on condition, the second on condition, the first off condition, and the second off condition, the upper temperature of the heating water tank 110 is obtained by adding the third preset temperature difference to the second detected temperature, thereby ensuring the hot water system's operating temperature.

[0074] In some embodiments, the hot water system further includes a first heat storage temperature sensor 181, a second heat storage temperature sensor 182, and a third heat storage temperature sensor 183. The first heat storage temperature sensor 181 is disposed in the first hot water storage tank 121 and is used to obtain the temperature of the first hot water storage tank 121. The second heat storage temperature sensor 182 is disposed in the second hot water storage tank 122 and is used to obtain the temperature of the second hot water storage tank 122. The third heat storage temperature sensor 183 is disposed in the third hot water storage tank 123 and is used to obtain the temperature of the third hot water storage tank 123.

[0075] An embodiment of the present invention provides a hot water system, which is, for example, the hot water system of any of the above-mentioned embodiments. In addition, the hot water system further includes a controller.

[0076] Figure 4 This is a schematic diagram of the hardware structure of a controller in one embodiment of a hot water system according to the present invention. The controller includes a memory 191 and at least one processor 192. The memory 191 stores instructions, and the at least one processor 192 invokes the instructions in the memory 191, causing the controller to execute the hot water system control method according to any of the aforementioned embodiments of the present invention.

[0077] Specifically, the processor 192 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured as one or more integrated circuits for implementing the embodiments of the present invention.

[0078] The memory 191 may include a large-capacity memory for data or instructions. By way of example and not limitation, the memory 191 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 191 may include removable or non-removable (or fixed) media. Where appropriate, the memory 191 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 191 is a non-volatile solid-state memory. In a specific embodiment, the memory 191 includes a read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0079] In one example, the controller of the hot water system may further include a communication interface 193 and a bus 194. The processor 192, the memory 191, and the communication interface 193 are connected via the bus 194 and communicate with each other.

[0080] The communication interface 193 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present invention.

[0081] Bus 194 includes hardware, software or both, and couples the components of the online data traffic metering device to each other. For example, and not limitation, the bus may include an accelerated graphics port (AGP) or other graphics bus, an enhanced industry standard architecture (EISA) bus, a front-side bus (FSB), a hypertransport (HT) interconnect, an industry standard architecture (ISA) bus, an infinite bandwidth interconnect, a low pin count (LPC) bus, a memory 191 bus, a microchannel architecture (MCA) bus, a peripheral component interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a serial advanced technology attachment (SATA) bus, a video electronics standard association local (VLB) bus or other suitable buses or a combination of two or more of these. Where appropriate, bus 194 may include one or more buses. Although the embodiments of the present invention describe and illustrate specific buses, the present invention contemplates any suitable bus or interconnect.

[0082] In addition, in conjunction with the hot water system control method in the above embodiments, embodiments of the present invention may provide a computer-readable storage medium for implementation. The computer-readable storage medium stores instructions that, when executed by a processor, implement any of the hot water system control methods in the above embodiments.

[0083] The present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present invention is not limited to the specific steps described and illustrated. Those skilled in the art may make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present invention.

[0084] The functional blocks shown in the above structured block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, a plug-in unit, a function card or the like. When implemented in software, the elements of the present invention are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0085] It should also be noted that the exemplary embodiments described herein describe methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the steps described above. In other words, the steps may be performed in the order described in the embodiments, or in a different order, or several steps may be performed simultaneously.

[0086] The above description is only a specific embodiment of the present invention. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention.

Claims

1. A hot water system control method, used in a hot water system, characterized in that: The hot water system includes a heating water tank, a first hot water storage tank, a second hot water storage tank, a third hot water storage tank, a circulation pipeline and a circulation control component. The second hot water storage tank is connected between the first hot water storage tank and the third hot water storage tank. The upper part of the heating water tank is connected to the first hot water storage tank. The circulation pipeline connects the third hot water storage tank and the heating water tank. The circulation control component is arranged on the circulation pipeline. When the circulation control component is turned on, the circulation pipeline inputs circulating water to the heating water tank. When the circulation control component is turned off, the circulation pipeline stops inputting circulating water to the heating water tank. The hot water system control method comprises: A first start condition, a second start condition, and a third start condition are preset, wherein the first start condition is that the temperature difference between the upper temperature of the heating water tank and the temperature of the first hot water storage tank is greater than or equal to a first preset temperature difference, the second start condition is that the upper temperature of the heating water tank is greater than or equal to a first preset temperature value, and the third start condition is that the temperature of the second hot water storage tank is less than or equal to a second preset temperature value; determining whether the third hot water storage tank meets a target hot water storage requirement according to the temperature of the third hot water storage tank; If the third hot water storage tank does not meet the target hot water storage requirement, controlling the circulation control component to start when the hot water system simultaneously meets the first start condition and the second start condition; If the third hot water storage tank has met the target hot water storage requirement, the circulation control component is controlled to be turned on when the hot water system simultaneously meets the first start-up condition, the second start-up condition and the third start-up condition.

2. The hot water system control method according to claim 1, wherein: The hot water system control method further includes: A first closing condition, a second closing condition, and a third closing condition are preset, wherein the first closing condition is that the temperature difference between the upper temperature of the heating water tank and the temperature of the first hot water storage tank is less than a second preset temperature difference, the second closing condition is that the upper temperature of the heating water tank is less than a third preset temperature value, and the third closing condition is that the temperature of the third hot water storage tank is greater than a fourth preset temperature value; If the hot water system satisfies the first shut-down condition and / or the second shut-down condition, and does not satisfy the third shut-down condition, controlling the circulation control component to shut down, and controlling the circulation control component to start up next time when the hot water system satisfies both the first start-up condition and the second start-up condition; If the hot water system meets the third closing condition, the circulation control component is controlled to be closed, and if the hot water system meets the first opening condition, the second opening condition and the third opening condition at the same time, the circulation control component is controlled to be opened next time.

3. The hot water system control method according to claim 2, wherein: The hot water system further includes a first temperature sensor disposed on the upper portion of the heating water tank, wherein the first temperature sensor can detect the first detection temperature of the heating water tank. In the first opening condition, the second opening condition, the first closing condition, and the second closing condition, the first detected temperature is used as the upper temperature of the heating water tank.

4. The hot water system control method according to claim 2, wherein: The hot water system further includes a second temperature sensor disposed at the lower portion of the heating water tank, the second temperature sensor being capable of detecting a second detection temperature of the heating water tank. In the first opening condition, the second opening condition, the first closing condition, and the second closing condition, the upper temperature of the heating water tank is obtained by adding the second detected temperature to the third preset temperature difference.

5. The hot water system control method according to claim 4, characterized in that: The third preset temperature difference is within the range of 4 degrees Celsius to 6 degrees Celsius.

6. The hot water system control method according to claim 4, wherein: The hot water system control method further includes: After the circulation control component is continuously turned on for a first preset time period, a temperature sensing fault self-check is performed on the second temperature sensor.

7. The hot water system control method according to claim 6, wherein: The hot water system further includes a heat pump, a heat pump water inlet pipe and a heat pump water outlet pipe. The heat pump water inlet pipe and the heat pump water outlet pipe are both connected between the heat pump and the heating water tank. The heat pump water inlet pipe is connected to the lower part of the heating water tank. The performing a temperature sensing fault self-test on the second temperature sensor includes: If the temperature difference between the second detected temperature and the inlet temperature of the liquid in the heat pump inlet pipe is less than or equal to a fourth preset temperature difference for a second consecutive preset time period, it is determined that the second temperature sensor is sensing temperature normally; If the temperature difference between the second detected temperature and the inlet temperature of the liquid in the heat pump inlet pipe is greater than the fourth preset temperature difference for a second consecutive preset time period, it is determined that the second temperature sensor has a temperature sensing fault.

8. The hot water system control method according to claim 7, wherein: The second preset duration is set to be greater than 4 seconds; The fourth preset temperature difference is within 3 degrees Celsius.

9. The hot water system control method according to claim 7, wherein: The hot water system further includes a first temperature sensor disposed on the upper portion of the heating water tank, wherein the first temperature sensor can detect the first detection temperature of the heating water tank. After determining that the second temperature sensor senses temperature normally, the hot water system control method further includes: A temperature sensing fault self-test is performed on the first temperature sensor, wherein if the first detected temperature is less than a difference between the second detected temperature and a fifth preset temperature value, it is determined that a temperature sensing fault exists in the first temperature sensor.

10. The hot water system control method according to claim 6, wherein: The first preset duration is set to be greater than 120 seconds.

11. A hot water system, characterized in that: The hot water system includes a controller, the controller includes a memory and at least one processor, the memory stores instructions, The at least one processor calls the instructions in the memory, so that the controller executes the hot water system control method according to any one of claims 1 to 10.

12. A computer-readable storage medium having instructions stored thereon, characterized in that: When the instructions are executed by a processor, the hot water system control method according to any one of claims 1 to 10 is implemented.

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