Control method of heat pump water heater and heat pump water heater

Abstract

The invention relates to the technical field of hot water supply equipment, and discloses a control method of a heat-pump water heater and the heat-pump water heater, and the control method comprises the following steps: controlling the heat-pump water heater to heat a water tank liner when the heat-pump water heater is in a heating mode and the first water temperature in the water tank liner is less than a target temperature; in response to the situation that the duration of heating the water tank inner container meets the first preset duration, the second water temperature in the water tank inner container is obtained, and a first difference value between the condensation temperature of the heat pump water heater and the second water temperature is determined; and the working mode of the heat-pump water heater is determined based on the first difference value, and work of the heat-pump water heater is controlled based on the determined working mode. The heat pump water heater is controlled to work according to the first difference value between the condensation temperature and the second water temperature and the determined working mode, so that related components of the heat pump water heater are controlled to work, the heat transfer efficiency of the condenser is effectively improved, the condenser is prevented from being in a high-temperature state for a long time, and the service life of the heat pump water heater is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of hot water supply equipment, and in particular to a control method for a heat pump water heater and a heat pump water heater. Background Art

[0002] Heat pump water heaters, also known as air source heat pump water heaters, are widely used because of their energy saving and high efficiency. Traditional heat pump water heaters often use static heating to work; when the inner wall of the water tank of the heat pump water heater is scaled, when using static heating, the scale will block the heat transferred from the condenser to the water tank, thereby reducing the heating efficiency of the heat pump water heater, and will also keep the condenser in a high temperature state, resulting in an increase in the power consumption of the heat pump water heater, and will also accelerate the consumption of the service life of the heat pump water heater. Summary of the invention

[0003] The technical problem solved by the present invention is to provide a control method for a heat pump water heater, which effectively solves the technical problems of high power consumption and low heating efficiency of the heat pump water heater.

[0004] The above technical problems are solved by the following technical solutions:

[0005] A control method for a heat pump water heater, the heat pump water heater comprising a water tank inner tank and a flow-turbulating cleaning device arranged in the water tank inner tank, the flow-turbulating cleaning device comprising a flow-turbulating cleaning wheel, the flow-turbulating cleaning wheel being movable along the axial direction of the water tank inner tank; the outer peripheral surface of the flow-turbulating cleaning wheel abuts against the side wall of the water tank inner tank; the method comprising:

[0006] When the heat pump water heater is in a heating mode and the first water temperature in the water tank inner tank is lower than the target temperature, controlling the heat pump water heater to heat the water tank inner tank;

[0007] In response to the time duration of heating the water tank inner tank meeting the first preset time duration, obtaining a second water temperature in the water tank inner tank, and determining a first difference between the condensing temperature of the heat pump water heater and the second water temperature;

[0008] The operating mode of the heat pump water heater is determined based on the first difference, and the operation of the heat pump water heater is controlled based on the determined operating mode, wherein the operating mode includes at least one of a static heating mode, a disturbance heating mode and a self-cleaning mode.

[0009] Compared with the background technology, the control method of the heat pump water heater described in the present invention has the following beneficial effects: when the water tank liner of the heat pump is severely scaled, it will affect the heat exchange between the condenser and the water tank liner. Therefore, the present invention provides a spoiler cleaning wheel that can move along the axial direction of the water tank liner in the water tank liner, and the outer peripheral surface of the spoiler cleaning wheel abuts against the side wall of the water tank liner, which can not only clean the water tank liner, but also disturb the water body, so that the heat pump water heater has a static heating mode, a disturbance heating mode and a self-cleaning mode, specifically: when the heat pump water heater is in the heating mode and detects that the first water temperature in the water tank liner is lower than the target temperature, the main controller of the heat pump water heater controls the condenser arranged outside the water tank liner to heat the water tank liner to increase the water temperature in the water tank liner. During the heating process, the main controller detects the heating time. When the heating time reaches the first preset time, the heat pump water heater operates stably. Further, the second water temperature in the water tank tank and the condensation temperature of the condenser are obtained by a temperature sensor arranged in the water tank tank, and the first difference between the condensation temperature and the second water temperature is calculated. The first difference can reflect the working state of the heat pump water heater, thereby judging whether the heat exchange efficiency of the heat pump water heater is normal. The working mode of the heat pump water heater is then determined according to the first difference, and the working mode is determined to control the working of the heat pump water heater, thereby controlling the working of the related components of the heat pump water heater, effectively improving the heat transfer efficiency of the condenser, improving the energy efficiency of the heat pump water heater, and at the same time, helping to increase the service life of the heat pump water heater.

[0010] In one embodiment, determining the operating mode of the heat pump water heater based on the first difference includes:

[0011] When the first difference is less than a first preset temperature, determining that the working mode of the heat pump water heater is a static heating mode;

[0012] When the first difference is between the first preset temperature and the second preset temperature, the operation mode of the heat pump water heater is determined to be a disturbance heating mode, and the second preset temperature is greater than the first preset temperature; the disturbance heating mode is characterized by heating the water tank inner tank while causing the water in the water tank inner tank to flow;

[0013] When the first difference is between the second preset temperature and the third preset temperature, the working mode of the heat pump water heater is determined to be the self-cleaning mode, and the third preset temperature is greater than the second preset temperature; the self-cleaning mode is characterized by cleaning the inside of the water tank.

[0014] Beneficial effect: When the first difference is less than the first preset temperature, the condensing temperature of the heat pump water heater and the water temperature of the water tank are close, which is within the normal heat transfer temperature difference range. The heat transfer efficiency of the condenser is relatively high. At this time, the working mode of the heat pump water heater is determined to be the static heating mode, so that the heat pump water heater continues to heat the water tank in a relatively stable state.

[0015] When the first difference is between the first preset temperature and the second preset temperature, it indicates that the heat transfer efficiency of the condenser is in a moderate range. At this time, the working mode of the heat pump water heater is determined to be the disturbance heating mode, and the relevant components in the water tank are controlled to work to disturb the water in the water tank so that the heat is more evenly distributed in the water, thereby improving the heating efficiency.

[0016] When the first difference is between the second preset temperature and the third preset temperature, it indicates that the heat transfer efficiency of the condenser is relatively low, and there may be factors that affect the heat transfer efficiency inside the water tank, such as scale inside the water tank. At this time, the working mode of the heat pump water heater is determined to be the self-cleaning mode, and the scale and other impurities inside the water tank are cleaned by turning on the self-cleaning mode to improve the performance of the heat pump water heater and ensure the subsequent heating efficiency and normal operation of the heat pump water heater.

[0017] In one embodiment, the heat pump water heater further comprises a transmission member disposed in the water tank inner tank, the transmission member is disposed along the axial direction of the water tank inner tank, and the spoiler cleaning wheel is sleeved on the transmission member;

[0018] The step of controlling the operation of the heat pump water heater based on the determined operation mode comprises:

[0019] In response to the working mode being the self-cleaning mode, controlling the spoiler cleaning wheel to move axially along the transmission member a first target number of times;

[0020] Acquiring a third water temperature in the water tank, and determining a second difference between the condensing temperature of the heat pump water heater and the third water temperature;

[0021] In response to the second difference being between the second preset temperature and the third preset temperature, the operation mode of the heat pump water heater is again determined to be the self-cleaning mode.

[0022] Beneficial effects: When the working mode is determined to be the self-cleaning mode, the spoiler cleaning wheel is controlled to move along the axial direction of the transmission member; the spoiler cleaning wheel moves from the preset position to a direction away from the preset position, and then returns to the preset position, and the spoiler cleaning wheel moves along the axial direction of the transmission member once; by allowing the spoiler cleaning wheel to move along the axial direction for a certain number of times, the protrusions on the outer peripheral side of the spoiler cleaning wheel can fully clean the inner tank of the water tank and effectively remove impurities such as scale. Moreover, as the spoiler cleaning wheel moves, the spoiler cleaning wheel can also disturb the water in the inner tank of the water tank, so that the heat is more evenly distributed in the water, thereby improving the heating efficiency.

[0023] After the number of movements meets the first target number, the third water temperature in the water tank liner is detected, and the second difference between the condensing temperature of the heat pump water heater and the third water temperature is calculated, so as to detect whether the heat exchange effect of the condenser is improved after the water tank liner is cleaned. If the second difference is still between the second preset temperature and the third preset temperature, it means that although a cleaning has been performed, the heat exchange effect of the condenser has not reached the ideal state, and there may still be factors affecting the heat exchange inside the water tank liner, then the working mode of the heat pump water heater is determined to be the self-cleaning mode again, so as to further clean the inside of the water tank liner until the heat exchange effect of the condenser returns to the normal range, so as to further ensure the subsequent heating efficiency and the normal operation of the heat pump water heater.

[0024] In one embodiment, the heat pump water heater further includes a water outlet pipe, a water outlet pipe solenoid valve, a water inlet pipe, a water inlet pipe solenoid valve, a drain pipe and a drain pipe solenoid valve; the water outlet pipe, the water inlet pipe and the drain pipe are respectively connected to the water tank inner tank, the water outlet pipe solenoid valve is arranged on the water outlet pipe, and is used to control the on-off of the water outlet pipe, the water inlet pipe solenoid valve is arranged on the water inlet pipe, and is used to control the on-off of the water inlet pipe, and the drain pipe solenoid valve is arranged on the drain pipe, and is used to control the on-off of the drain pipe;

[0025] The method further comprises:

[0026] In response to the second difference being less than the second preset temperature, controlling the heat pump water heater to turn off the heating mode;

[0027] The water outlet pipe solenoid valve and the water inlet pipe solenoid valve are controlled to be closed, and the drain pipe solenoid valve is controlled to be opened, so as to discharge the water in the water tank through the drain pipe.

[0028] Beneficial effect: When the second difference is less than the second preset temperature, it indicates that the heat exchange efficiency of the condenser has reached a relatively ideal state after cleaning, and the water containing impurities in the water tank needs to be discharged at this time. First, control the heat pump water heater to turn off the heating mode to avoid excessive energy consumption; secondly, close the outlet pipe solenoid valve and the inlet pipe solenoid valve to prevent new water from entering the water tank during the drainage process and to prevent the hot water in the water tank from accidentally flowing out to the user end. Finally, open the drain pipe solenoid valve to drain the water containing impurities in the water tank through the drain pipe. By draining the water containing impurities in the water tank through the drain pipe, the cleanliness of the water flow in the water tank can be ensured when the water heater is used next time, thereby improving the user's water experience.

[0029] In one embodiment, after controlling the drain pipe solenoid valve to open, the method further includes:

[0030] Controlling the spoiler cleaning wheel to move axially along the transmission member a second target number of times;

[0031] In response to the drainage time satisfying the second preset time length, controlling the water inlet pipe solenoid valve to open, and controlling the water inlet pipe solenoid valve to close again after the water inlet pipe solenoid valve opening time satisfies the third preset time length;

[0032] In response to the closing time of the water inlet pipe solenoid valve meeting a fourth preset time length, controlling the drain pipe solenoid valve to close, and controlling the water inlet pipe solenoid valve to open again;

[0033] In response to the water volume in the water tank satisfying the target flow rate, the water outlet pipe solenoid valve is controlled to open, and the heat pump water heater is controlled to enter the heating mode again.

[0034] Beneficial effect: After the drain pipe solenoid valve is controlled to open, the spoiler cleaning wheel is moved along the axial direction of the transmission member for the second target number of times, so that the inner tank of the water tank can be cleaned again during the drainage process, and the power of the water flow is used to assist in cleaning the inner tank of the water tank. When the water is discharged from the drain pipe, the movement of the spoiler cleaning wheel can more thoroughly scrape off the impurities and scale remaining on the inner wall of the water tank and discharge them with the water flow.

[0035] When the drainage time meets the second preset time, most of the water in the water tank has been drained, but the scale and other impurities that have fallen to the bottom of the water tank may not be completely drained; at this time, the water inlet pipe solenoid valve is opened to pass running water into the water tank, thereby stirring the impurities that have fallen to the bottom of the water tank to further rinse the water tank so that the impurities inside are fully drained. After the water inlet pipe solenoid valve opening time meets the third preset time, the water inlet pipe solenoid valve is closed again to control the amount of water entering the water tank, and the water in the water tank continues to be drained.

[0036] Since the drain pipe is in a continuous drainage state, after the closing time of the water inlet pipe solenoid valve meets the fourth preset time, it indicates that the drain pipe drainage time has continued to discharge sewage for the fourth preset time since the water inlet pipe solenoid valve was closed. At this time, the water and impurities in the water tank inner tank are basically discharged, and then the drain pipe solenoid valve is closed and the water inlet pipe solenoid valve is opened to allow water to flow into the water tank inner tank again to ensure that there is enough water in the water tank inner tank for subsequent heating and other operations.

[0037] The amount of water entering the water tank is further counted through a water flow sensor installed on the water inlet pipe. When the water amount in the water tank meets the target flow, the water outlet pipe solenoid valve is controlled to open, and the heat pump water heater is controlled to enter the heating mode again, thus forming a complete cycle of drainage, cleaning, water intake and reheating, ensuring that the water tank can continue to provide users with hot water of suitable temperature and quality.

[0038] In one embodiment, the heat pump water heater further comprises a breathing tube and a breathing tube solenoid valve, one end of the breathing tube is connected to the water tank inner tank, and the other end is connected to the external environment, and the breathing tube solenoid valve is arranged on the breathing tube to control the on and off of the breathing tube;

[0039] After the control of closing the water outlet pipe solenoid valve and the water inlet pipe solenoid valve, the method further includes:

[0040] Control the breathing tube solenoid valve to open.

[0041] Beneficial effect: When the outlet pipe solenoid valve and the inlet pipe solenoid valve are closed, the air pressure inside the water tank will change due to the cessation of water flow. By opening the breathing tube solenoid valve, external air can enter the water tank through the breathing tube, thereby balancing the internal and external air pressures and preventing the water tank from being damaged by the pressure difference; and by opening the breathing tube solenoid valve, the drainage speed of the water tank can be accelerated, thereby improving the cleaning efficiency.

[0042] In one embodiment, the method further comprises:

[0043] When the amount of water in the water tank inner container meets the target flow rate and the fifth preset time is met, the solenoid valve of the breathing tube is controlled to be closed.

[0044] Beneficial effect: When the amount of water flowing into the water tank inner tank meets the target flow rate, the breathing tube solenoid valve is not closed immediately; instead, the breathing tube solenoid valve is closed after the fifth preset delay time, so that the air pressure inside the water tank inner tank has enough time to return to normal, avoiding closing the breathing tube solenoid valve too early and causing abnormal air pressure inside the water tank inner tank, thereby affecting the performance of the heat pump water heater.

[0045] In one embodiment, controlling the operation of the heat pump water heater based on the determined operation mode includes:

[0046] In response to the working mode being the disturbance heating mode, controlling the disturbance cleaning wheel to move axially along the transmission member;

[0047] A fourth water temperature in the water tank inner container is obtained, and when the fourth water temperature is greater than or equal to the target temperature, the spoiler cleaning wheel is controlled to move to a preset position.

[0048] Beneficial effect: In the disturbance heating mode, the water in the water tank needs to flow to improve the heating efficiency. The control cleaning wheel will change the flow state of the water in the water tank during the axial movement of the transmission part, so that the hot water and cold water are better mixed, and the heat is evenly distributed in the water, thereby improving the heating efficiency. At the same time, the spoiler cleaning wheel will also clean the scale on the inner wall of the water tank during the movement, further improving the heat transfer efficiency of the condenser. Further detect the fourth water temperature in the water tank. When it is detected that the fourth water temperature in the water tank is greater than or equal to the target temperature, the hot water in the water tank meets the use requirements; further control the spoiler cleaning wheel to move to the preset position, and clear the movement steps of the stepper motor; for example, control the spoiler cleaning wheel to move to the second limit structure. Placing the spoiler cleaning wheel at the second limit structure can make the hot water above the spoiler cleaning wheel flow from the outlet pipe to the water end when the user uses hot water, thereby ensuring the stability of the hot water supply.

[0049] In one embodiment, the heat pump water heater further includes a display panel, and the method further includes:

[0050] generating a control instruction based on the display panel;

[0051] In response to the control instruction, the heat pump water heater is controlled to enter the self-cleaning mode.

[0052] Beneficial effects: By setting a display panel on the heat pump water heater, the user can operate on the display panel to generate a control instruction. The main controller of the heat pump water heater receives the control instruction generated according to the display panel, thereby controlling the heat pump water heater to enter the self-cleaning mode and controlling the spoiler cleaning wheel to clean the inside of the water tank. By setting the display panel, the user can actively control the heat pump water heater to enter the self-cleaning mode, which can effectively improve the user experience.

[0053] On the other hand, the present invention further provides a heat pump water heater, comprising: a memory, a processor, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus;

[0054] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the control method of the heat pump water heater as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A schematic flow chart of a control method for a heat pump water heater according to an embodiment of the present invention;

[0057] Figure 2 A three-dimensional diagram of a control method for a heat pump water heater according to an embodiment of the present invention;

[0058] Figure 3 for Figure 3 A front view of the water tank structure shown;

[0059] Figure 4 for Figure 3 A partial enlarged view of part A;

[0060] Figure 5 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0061] Figure 6 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0062] Figure 7 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0063] Figure 8 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0064] Fig. 9 A schematic flow chart of a control method for a heat pump water heater according to another embodiment of the present invention;

[0065] Fig.10 The figure is a schematic structural diagram of a heat pump water heater according to another embodiment of the present invention.

[0066] Description of reference numerals:

[0067] 10. Shell; 11. Water tank liner; 111. Turbine cleaning wheel; 1111. First turbulent cleaning wheel; 1112. Second turbulent cleaning wheel; 1113. Protrusion; 1114. Water hole; 112. First limiting structure; 113. Second limiting structure; 114. Transmission member; 115. Filter; 116. Temperature sensor; 117. Fixing member; 118. Cylindrical section; 119. Arc section; 12. Driving assembly; 13. Water outlet pipe; 131. Water outlet pipe solenoid valve; 14. Water inlet pipe; 141. Water inlet pipe solenoid valve; 142. Water flow sensor; 15. Drain pipe; 151. Drain pipe solenoid valve; 16. Condenser; 17. Breathing pipe; 171. Breathing pipe solenoid valve. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0069] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0071] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] Combine the following Figures 1 to 10 , describing an embodiment of the present invention.

[0073] According to an embodiment of the present invention, on the one hand, Figures 2 to 4 As shown, a heat pump water heater is provided, comprising a shell 10 and a water tank liner 11, a driving assembly 12, a transmission member 114 and a turbulence cleaning device arranged in the shell 10; the driving assembly 12 is arranged on the top of the water tank liner 11, and the transmission member 114 is arranged inside the water tank liner 11; the driving assembly 12 is in transmission connection with the transmission member 114; the turbulence cleaning device is arranged inside the water tank liner 11, and the turbulence cleaning device comprises a turbulence cleaning wheel 111 connected to the transmission member 114, and the driving assembly 12 drives the turbulence cleaning wheel 111 to move axially along the water tank liner 11 through the transmission member 114; a plurality of protrusions 1113 are arranged on the outer peripheral surface of the turbulence cleaning wheel 111, and the protrusions 1113 abut against the side wall of the water tank liner 11; a condenser 16 is also arranged outside the water tank liner 11 for transferring heat to the water in the water tank liner 11.

[0074] Furthermore, the heat pump water heater also includes a water outlet pipe 13, a water outlet pipe solenoid valve 131, a water inlet pipe 14, a water inlet pipe solenoid valve 141, a drain pipe 15 and a drain pipe solenoid valve 151; the water outlet pipe 13, the water inlet pipe 14 and the drain pipe 15 are respectively connected to the water tank inner tank 11; the water outlet pipe 13 is arranged at the top of the water tank inner tank 11, and the water outlet pipe solenoid valve 131 is arranged on the water outlet pipe 13, for controlling the on-off of the water outlet pipe 13; the drain pipe 15 is arranged at the bottom of the water tank inner tank 11, and the drain pipe solenoid valve 151 is arranged on the drain pipe 15, for controlling the on-off of the drain pipe 15; the water inlet pipe 14 is arranged at the bottom of the water tank inner tank 11 and is located above the drain pipe 15, and the water inlet pipe solenoid valve 141 is arranged on the water inlet pipe 14, for controlling the on-off of the water inlet pipe 14.

[0075] Furthermore, the spoiler cleaning wheel 111 is provided with a plurality of water holes 1114, and the sum of the cross-sectional areas of the plurality of water holes 1114 is at least a target multiple of the cross-sectional area of ​​any one of the water inlet pipe 14, the water outlet pipe 13 and the drain pipe 15. The plurality of water holes 1114 are provided on the spoiler cleaning wheel 111, so that the normal flow of water is not affected during the cleaning process. The target multiple can be 1.5 times, 2 times, 2.5 times, 3 times, etc., and can be set according to actual use requirements without specific restrictions. By setting a suitable total cross-sectional area of ​​the water holes 1114, the obstruction of the spoiler cleaning wheel 111 to the water flow can be reduced, the water flow can smoothly pass through the area where the spoiler cleaning wheel 111 is located, and the scale can also pass through the water holes 1114 to fall to the bottom of the water tank inner tank 11, which not only ensures the cleaning function of the spoiler cleaning wheel 111, but also does not affect the normal water inlet, outlet and drainage functions of the water tank; and the water holes 1114 also have a certain spoiler effect, which effectively improves the heat exchange efficiency of the water flow, reduces the operating time of the condensing temperature, and reduces the load time of the heat pump water heater during its service life, thereby increasing the service life of the heat pump water heater.

[0076] In one achievable manner, the sum of the cross-sectional areas of the water holes 1114 is at least twice the cross-sectional area of ​​any one of the water inlet pipe 14, the water outlet pipe 13 and the drain pipe 15, or the sum of the cross-sectional areas of the water holes 1114 is at least twice the sum of the cross-sectional areas of the water inlet pipe 14, the water outlet pipe 13 and the drain pipe 15. If the cross-sectional area of ​​the water holes 1114 is too small, the spoiler cleaning wheel 111 may cause a large obstruction to the water flow during the normal water inlet, outlet or drainage process of the water tank liner 11. For example, assuming that the cross-sectional area of ​​the water inlet pipe 14 is S, and the sum of the cross-sectional areas of the water holes 1114 is 0.5S, then when water enters the water tank liner 11 from the water inlet pipe 14 at a certain flow rate, the spoiler cleaning wheel 111 will hinder the water flow, causing the water inlet speed to slow down, and may even cause abnormal changes in the water pressure inside the water tank. If the sum of the cross-sectional areas of the water holes 1114 is twice the cross-sectional area of ​​the water inlet pipe 14, the obstruction of the water flow by the spoiler cleaning wheel 111 will be small, and water can smoothly pass through the area where the spoiler cleaning wheel 111 is located, thereby ensuring the cleaning function of the spoiler cleaning wheel 111 without affecting the normal water inlet, outlet and drainage functions of the water tank.

[0077] Furthermore, the spoiler cleaning wheel 111 includes a first spoiler cleaning wheel 1111 and a second spoiler cleaning wheel 1112 spaced apart from each other, and a plurality of protrusions 1113 on the outer circumference of the first spoiler cleaning wheel 1111 and a plurality of protrusions 1113 on the outer circumference of the second spoiler cleaning wheel 1112 are staggered in the upper and lower directions.

[0078] Furthermore, a plurality of protrusions 1113 are arranged at intervals on the outer circumference of the spoiler cleaning wheel 111, and a groove 1115 is formed between two adjacent protrusions 1113, and the length of the protrusion 1113 is greater than or equal to the length of the groove 1115. By arranging the plurality of protrusions 1113 on the outer circumference of the first spoiler cleaning wheel 1111 and the plurality of protrusions 1113 on the outer circumference of the second spoiler cleaning wheel 1112 in an up-down staggered manner, and setting the length of the protrusion 1113 to be greater than or equal to the length of the groove 1115, it can be ensured that during the axial movement of the spoiler cleaning wheel 111, the inner wall of the water tank liner 11 is firstly scraped and cleaned according to the protrusions 1113 on the first spoiler cleaning wheel 1111; secondly, the protrusions 1113 on the second spoiler cleaning wheel 1112 scrape and clean the inner wall of the water tank liner 11 opposite to the groove 1115 of the first spoiler cleaning wheel 1111, thereby comprehensively cleaning the inner wall of the water tank liner 11. By setting the length of the protrusion 1113 to be greater than or equal to the length of the groove 1115, it can be ensured that the inner wall of the water tank liner 11 opposite to the groove 1115 is fully scraped to avoid scale residue on the inner wall of the water tank liner 11.

[0079] Furthermore, the water tank liner 11 includes a cylindrical section 118 and arcuate sections 119 arranged at both ends of the cylindrical section 118; a first limiting structure 112 is provided at the top of the cylindrical section 118, and the first limiting structure 112 is sleeved on the transmission member 114 and fixedly connected to the transmission member 114, and the first limiting structure 112 rotates with the transmission of the transmission member 114.

[0080] Furthermore, a fixing member 117 is also provided in the water tank liner 11, and the fixing member 117 is fixedly arranged at the bottom of the water tank liner 11. A second limiting structure 113 is provided at the bottom end of the cylindrical section 118 and fixedly arranged on the fixing member 117. A through hole matching the transmission member 114 is provided on the second limiting structure 113, and the transmission member 114 is arranged in the through hole and abuts against the inner wall of the through hole. The through hole on the second limiting structure 113 is used to prevent the radial displacement of the transmission member 114 when it rotates, so that the rotational movement of the transmission member 114 is more stable, and it is ensured that the spoiler cleaning wheel 111 can better move along the axial direction of the transmission member 114.

[0081] Furthermore, the transmission member 114 includes a transmission screw, which is connected to the driving assembly 12 , and the spoiler cleaning wheel 111 is threadedly sleeved on the transmission screw and moves axially along the transmission screw.

[0082] Furthermore, it also includes a filter 115, which is arranged inside the water tank liner 11 and is connected to the water outlet pipe 13. The height of the lower end of the filter 115 is the same as the height of the lower end of the first limiting structure 112; the surface of the spoiler cleaning wheel 111 opposite to the filter 115 is also provided with a brush for cleaning the scale on the filter 115. When hot water flows from the water tank liner 11 to the water outlet pipe 13 through the filter 115, the filter 115 can intercept the scale or other solid impurities generated in the water tank liner 11. The height of the lower end of the filter 115 is set to the same height as the lower end of the first limiting structure 112, so that when the spoiler cleaning wheel 111 moves to the first limiting structure 112, the surface of the filter 115 can be cleaned by the first spoiler cleaning wheel 1111.

[0083] According to an embodiment of the present invention, on the one hand, Figure 1 As shown, a control method for a heat pump water heater is provided, comprising the following steps:

[0084] Step S100: when the heat pump water heater is in a heating mode and the first water temperature in the water tank inner tank 11 is lower than the target temperature, control the heat pump water heater to heat the water tank inner tank 11;

[0085] Step S200, in response to the time length of heating the water tank inner tank 11 meeting the first preset time length, obtaining the second water temperature in the water tank inner tank 11, and determining a first difference between the condensing temperature of the heat pump water heater and the second water temperature;

[0086] Step S300, determining an operating mode of the heat pump water heater based on the first difference, and controlling the operation of the heat pump water heater based on the determined operating mode, wherein the operating mode includes at least one of a static heating mode, a disturbance heating mode and a self-cleaning mode.

[0087] In this embodiment, when the heat pump water heater is in the on state, the heat pump water heater is in the heating mode; the first water temperature in the water tank liner 11 is detected by the temperature sensor 116 arranged in the water tank liner 11. When it is detected that the first water temperature in the water tank liner 11 is lower than the target temperature, the main controller of the heat pump water heater controls the condenser 16 arranged outside the water tank liner 11 to heat the water tank liner 11 to increase the water temperature in the water tank liner 11. During the heating process, the main controller will detect the heating time. When the heating time reaches the first preset time, the heat pump water heater operates stably, and further obtains the second water temperature in the water tank liner 11 through the temperature sensor 116 arranged in the water tank liner 11. Among them, the first preset time can be 8 minutes, 10 minutes, 12 minutes, etc., and there is no specific limitation, which can be set according to the use requirements.

[0088] Further, the condensation temperature of the condenser 16 is obtained, and the first difference between the condensation temperature and the second water temperature is calculated. The first difference can reflect the working state of the heat pump water heater, so as to judge whether the heat exchange efficiency of the heat pump water heater is normal. Then the working mode of the heat pump water heater is determined according to the first difference. For example, if the first difference is small, it indicates that the heating efficiency of the heat pump water heater is good. At this time, the original working mode can be maintained to continue heating the water tank liner 11; if the first difference is large, it indicates that the heating efficiency of the heat pump water heater is poor. At this time, the original working mode needs to be changed to improve the heating efficiency of the heat pump water heater. Finally, the work of the heat pump water heater is controlled by the determined working mode, so as to control the work of the relevant components of the heat pump water heater, effectively improve the heat transfer efficiency of the condenser 16, improve the energy efficiency of the heat pump water heater, and help to improve the service life of the heat pump water heater.

[0089] like Figure 5 As shown, in one embodiment, step S300 includes the following steps:

[0090] Step S310: When the first difference is less than the first preset temperature, determine that the working mode of the heat pump water heater is a static heating mode.

[0091] In step S310, when the first difference is less than the first preset temperature, the condensing temperature of the heat pump water heater is close to the water temperature of the water tank liner 11, which is within the normal heat transfer temperature difference range. The heat transfer efficiency of the condenser 16 is relatively high, and the working mode of the heat pump water heater is determined to be the static heating mode, so that the heat pump water heater continues to heat the water tank liner 11 in a relatively stable state.

[0092] Step S320, when the first difference is between the first preset temperature and the second preset temperature, determine that the working mode of the heat pump water heater is the disturbance heating mode, and the second preset temperature is greater than the first preset temperature; the disturbance heating mode is characterized by heating the water tank inner tank 11 while causing the water in the water tank inner tank 11 to flow.

[0093] In step S320, when the first difference is between the first preset temperature and the second preset temperature, it indicates that the heat transfer efficiency of the condenser 16 is in a moderate range. At this time, the operation mode of the heat pump water heater is determined to be the disturbance heating mode, and the relevant components in the water tank liner 11 are controlled to work to disturb the water in the water tank liner 11, so that the heat is more evenly distributed in the water, thereby improving the heating efficiency.

[0094] Step S330, when the first difference is between the second preset temperature and the third preset temperature, determine that the working mode of the heat pump water heater is the self-cleaning mode, and the third preset temperature is greater than the second preset temperature; the self-cleaning mode is characterized by cleaning the inside of the water tank liner 11.

[0095] In step S330, when the first difference is between the second preset temperature and the third preset temperature, it indicates that the heat transfer efficiency of the condenser 16 is relatively low, and there may be factors that affect the heat transfer efficiency inside the water tank liner 11, such as scale inside the water tank liner 11. At this time, the working mode of the heat pump water heater is determined to be the self-cleaning mode, and the scale and other impurities inside the water tank liner 11 are cleaned by turning on the self-cleaning mode to improve the performance of the heat pump water heater and ensure the subsequent heating efficiency and normal operation of the heat pump water heater. Among them, the first preset temperature can be 4°C, 5°C, 6°C, etc., the second preset temperature can be 9°C, 10°C, 11°C, etc., and the third preset temperature can be 14°C, 15°C, 16°C, etc.; the first preset temperature, the second preset temperature and the third preset temperature are not specifically limited and can be set according to the use requirements.

[0096] In one embodiment, the driving assembly 12 can be a stepper motor, and the transmission screw is connected to the output shaft of the stepper motor; the stepper motor provides driving force for the transmission screw, thereby driving the spoiler cleaning wheel 111 to move along the axial direction of the transmission screw. Figure 6 As shown, step S300 also includes the following steps:

[0097] Step S340, in response to the working mode being the self-cleaning mode, controlling the spoiler cleaning wheel 111 to move axially along the transmission member 114 a first target number of times;

[0098] In step S340, when the working mode is determined to be the self-cleaning mode, the spoiler cleaning wheel 111 is controlled to move axially along the transmission member 114; the spoiler cleaning wheel 111 moves from the preset position to a direction away from the preset position, and then returns to the preset position, and the spoiler cleaning wheel 111 is recorded to move axially along the transmission member 114 once. For example, the preset position is the second limiting structure 113, which is set at the bottom of the water tank liner 11, and the first target number is 3 times; the spoiler cleaning wheel 111 starts from the second limiting structure 113 of the water tank liner 11, moves axially upward along the transmission member 114, moves to the first limiting structure 112 set at the top of the water tank liner 11, and then returns to the second limiting structure 113; during the movement of the spoiler cleaning wheel 111, the protrusions 1113 on the outer peripheral side of the spoiler cleaning wheel 111 will clean the inner wall of the water tank liner 11, thereby scraping off the scale on the inner wall of the water tank liner 11. By controlling the spoiler cleaning wheel 111 to move back and forth three times, the inner wall of the water tank liner 11 can be cleaned more comprehensively. Moreover, as the spoiler cleaning wheel 111 moves, the spoiler cleaning wheel 111 can also disturb the water in the water tank liner 11, so that the heat is more evenly distributed in the water, thereby improving the heating efficiency.

[0099] Step S350, obtaining a third water temperature in the water tank 11, and determining a second difference between the condensing temperature of the heat pump water heater and the third water temperature;

[0100] In step S350, after the number of exercises meets the first target number, the third water temperature in the water tank liner 11 is detected by the temperature sensor 116, and the second difference between the condensing temperature of the heat pump water heater and the third water temperature is calculated, so as to detect whether the heat exchange effect of the condenser 16 is improved after the water tank liner 11 is cleaned.

[0101] Step S360: in response to the second difference being between the second preset temperature and the third preset temperature, determining again that the operating mode of the heat pump water heater is the self-cleaning mode.

[0102] In step S360, if the second difference is still between the second preset temperature and the third preset temperature, it means that although a cleaning has been performed, the heat exchange effect of the condenser 16 has not reached the ideal state, and there may still be factors affecting the heat exchange inside the water tank liner 11. Then, the working mode of the heat pump water heater is determined to be the self-cleaning mode again, so as to further clean the inside of the water tank liner 11 until the heat exchange effect of the condenser 16 returns to the normal range, so as to further ensure the subsequent heating efficiency and the normal operation of the heat pump water heater.

[0103] like Figure 7As shown, in one embodiment, the following steps are also included:

[0104] Step 361: In response to the second difference being less than the second preset temperature, controlling the heat pump water heater to turn off the heating mode;

[0105] Step 362 , control the water outlet pipe solenoid valve 131 and the water inlet pipe solenoid valve 141 to be closed, and control the drain pipe solenoid valve 151 to be opened, so as to discharge the water in the water tank liner 11 through the drain pipe 15 .

[0106] In this embodiment, when the second difference is less than the second preset temperature, it indicates that the heat exchange efficiency of the condenser 16 has reached a relatively ideal state after cleaning, and the water containing impurities in the water tank liner 11 needs to be discharged at this time. First, the heat pump water heater is controlled to turn off the heating mode to avoid excessive energy consumption; secondly, the outlet pipe solenoid valve 131 and the inlet pipe solenoid valve 141 are closed to prevent new water from entering the water tank liner 11 during the drainage process and to prevent the hot water in the water tank liner 11 from accidentally flowing out to the user end. Finally, the drain pipe solenoid valve 151 is opened to drain the water containing impurities in the water tank liner 11 through the drain pipe 15. By draining the water containing impurities in the water tank liner 11 through the drain pipe 15, the cleanliness of the water flow in the water tank liner 11 can be ensured when the water heater is used next time, thereby improving the user's water experience.

[0107] like Figure 8 As shown, in one embodiment, after step 362, the method further includes:

[0108] Step 363 , controlling the spoiler cleaning wheel 111 to move axially along the transmission member 114 a second target number of times.

[0109] In step 363, after the drain pipe solenoid valve 151 is controlled to open, the spoiler cleaning wheel 111 is moved axially along the transmission member 114 for the second target number of times, so that the water tank liner 11 can be cleaned again during the drainage process, and the power of the water flow can be used to assist in cleaning the water tank liner 11. When water is discharged from the drain pipe 15, the movement of the spoiler cleaning wheel 111 can more thoroughly scrape off the impurities, scale, etc. remaining on the inner wall of the water tank liner 11 and discharge them with the water flow. Among them, the second target number of times can be 2 times, 3 times, 4 times, etc., and the second target number of times can be consistent with the first target number of times, which can be set according to the use requirements.

[0110] Step 364, in response to the drainage time satisfying the second preset time length, the water inlet pipe solenoid valve 141 is controlled to be opened, and the water inlet pipe solenoid valve 141 is controlled to be closed again after the opening time of the water inlet pipe solenoid valve 141 satisfies the third preset time length.

[0111] In step 364, when the drainage time meets the second preset time, most of the water in the water tank liner 11 has been drained, but the scale and other impurities that have fallen to the bottom of the water tank liner 11 may not be completely drained; at this time, the water inlet pipe solenoid valve 141 is opened, and live water is introduced into the water tank liner 11, thereby stirring the impurities that have fallen to the bottom of the water tank liner 11, so as to further rinse the water tank liner 11 and fully drain the impurities inside. After the opening time of the water inlet pipe solenoid valve 141 meets the third preset time, the water inlet pipe solenoid valve 141 is closed again to control the amount of water entering the water tank liner 11, and the water in the water tank liner 11 continues to be drained. Among them, the second preset time can be 45 minutes, 50 minutes, 55 minutes, etc.; the third preset time can be 4 minutes, 5 minutes, 6 minutes, etc.; the second preset time and the third preset time can be set according to the use requirements.

[0112] Step 365: in response to the closing time of the water inlet pipe solenoid valve 141 satisfying the fourth preset time, controlling the drain pipe solenoid valve 151 to close, and controlling the water inlet pipe solenoid valve 141 to open again;

[0113] In step 365, since the drain pipe 15 is in a continuous drainage state, after the closing time of the water inlet pipe solenoid valve 141 meets the fourth preset time, it indicates that the drainage time of the drain pipe 15 continues to discharge sewage for the fourth preset time after the water inlet pipe solenoid valve 141 is closed. At this time, the water and impurities in the water tank liner 11 are basically discharged, and then the drain pipe solenoid valve 151 is closed and the water inlet pipe solenoid valve 141 is opened to pass water into the water tank liner 11 again to ensure that there is enough water in the water tank liner 11 for subsequent heating and other operations. Among them, the fourth preset time can be 7 minutes, 8 minutes, 9 minutes, etc., which can be set according to the use requirements.

[0114] Step 366: In response to the water volume in the water tank 11 meeting the target flow rate, the water outlet pipe solenoid valve 131 is controlled to open, and the heat pump water heater is controlled to enter the heating mode again.

[0115] In step 366, the amount of water entering the water tank liner 11 is further counted by the water flow sensor 142 arranged on the water inlet pipe 14. When the amount of water in the water tank liner 11 meets the target flow, the water outlet pipe solenoid valve 131 is controlled to open, so that hot water can be smoothly supplied to the user after the heating is completed, reducing the time for the user to wait for hot water. Then the heat pump water heater is controlled to enter the heating mode again to heat the cold water flowing into the water tank liner 11, so as to meet the user's demand for hot water. Through a complete cycle of drainage, cleaning, water intake and reheating, it is ensured that the water tank liner 11 can continue to provide users with hot water of suitable temperature and quality. Among them, the target flow can be set to 80%, 90%, 100% of the capacity of the water tank liner 11, etc., which can be set according to the actual use needs, without specific limitation.

[0116] In one embodiment, the heat pump water heater further includes a breathing tube 17 and a breathing tube solenoid valve 171, one end of the breathing tube 17 is connected to the water tank liner 11, and the other end is connected to the external environment, and the breathing tube solenoid valve 171 is arranged on the breathing tube 17 to control the on and off of the breathing tube 17. After step 362, it also includes: controlling the breathing tube solenoid valve 171 to open.

[0117] In this embodiment, when the water outlet solenoid valve 131 and the water inlet solenoid valve 141 are closed, the air pressure inside the water tank liner 11 will change due to the cessation of water flow. By opening the breathing tube solenoid valve 171, external air can enter the water tank liner 11 through the breathing tube 17, thereby balancing the internal and external air pressures and preventing the water tank liner 11 from being damaged due to the air pressure difference; and by opening the breathing tube solenoid valve 171, the drainage speed of the water tank liner 11 can be accelerated, thereby improving the cleaning efficiency.

[0118] In one of the embodiments, the method further includes: when the amount of water in the water tank inner liner 11 meets the target flow rate and the fifth preset time, controlling the solenoid valve of the breathing tube 17 to close.

[0119] In this embodiment, when the amount of water introduced into the water tank liner 11 meets the target flow rate, the breathing tube solenoid valve 171 is not closed immediately; instead, the breathing tube solenoid valve 171 is closed after a delay of the fifth preset time, so that the air pressure inside the water tank liner 11 has enough time to return to a normal state, avoiding premature closing of the breathing tube solenoid valve 171, which may cause abnormal air pressure inside the water tank liner 11, thereby affecting the performance of the heat pump water heater. The fifth preset time may be 10s, 15s, 20s, etc., and may be set according to actual usage requirements without specific limitation.

[0120] like Fig. 9 As shown, in one embodiment, step S300 further includes the following steps:

[0121] Step S370 , in response to the working mode being the disturbance heating mode, controlling the disturbance cleaning wheel 111 to move axially along the transmission member 114 .

[0122] In step S370, in the disturbance heating mode, the water in the water tank liner 11 needs to flow to improve the heating efficiency. The flow state of the water in the water tank liner 11 is changed by controlling the flow cleaning wheel 111 to move along the axial direction of the transmission member 114, so that the hot water and the cold water are better mixed, and the heat is evenly distributed in the water, thereby improving the heating efficiency. At the same time, the flow cleaning wheel 111 will also clean the scale on the inner wall of the water tank liner 11 during the movement, further improving the heat transfer efficiency of the condenser 16.

[0123] Step S380, obtaining a fourth water temperature in the water tank inner container, and when the fourth water temperature is greater than or equal to the target temperature, controlling the spoiler cleaning wheel 111 to move to a preset position.

[0124] In step S380, the fourth water temperature in the water tank liner 11 is detected by the temperature sensor 116. When it is detected that the fourth water temperature in the water tank liner 11 is greater than or equal to the target temperature, the hot water in the water tank liner 11 meets the use demand; the spoiler cleaning wheel 111 is further controlled to move to the second limiting structure 113, and the movement steps of the stepper motor are cleared. Placing the spoiler cleaning wheel 111 at the second limiting structure 113 can make the hot water above the spoiler cleaning wheel 111 flow from the water outlet pipe 13 to the water use end when the user uses hot water, thereby ensuring the stability of the hot water supply.

[0125] In one embodiment, the heat pump water heater further comprises a display panel, and further comprises:

[0126] generating control instructions based on the display panel;

[0127] In response to the control instruction, the heat pump water heater is controlled to enter a self-cleaning mode.

[0128] In this embodiment, a display panel is provided on the heat pump water heater, and the user can operate on the display panel and generate control instructions through buttons or touch screens on the display panel. The main controller of the heat pump water heater receives the control instructions generated according to the display panel, thereby controlling the heat pump water heater to enter the self-cleaning mode and controlling the spoiler cleaning wheel 111 to clean the inside of the water tank liner 11. By providing a display panel, the user can actively control the heat pump water heater to enter the self-cleaning mode, which can effectively improve the user experience. Among them, the display panel can also display various status information of the heat pump water heater, such as water temperature, working mode, fault information, etc. The user can intuitively understand the operation of the heat pump water heater through the display panel and issue corresponding operation instructions according to their needs.

[0129] Fig.10 The schematic diagram of the structure of the heat pump water heater provided in the embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the heat pump water heater.

[0130] like Fig.10 As shown, the heat pump water heater may include: a processor 502 , a communications interface 504 , a memory 506 , and a communications bus 508 .

[0131] The processor 502, the communication interface 504, and the memory 506 communicate with each other via the communication bus 508. The communication interface 504 is used to communicate with other devices such as a client or other server network elements. The processor 502 is used to execute the program 510, which can specifically execute the relevant steps in the above-mentioned control method embodiment for the heat pump water heater.

[0132] Specifically, the program 510 may include program code including computer-executable instructions.

[0133] The processor 502 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the heat pump water heater may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0134] The memory 506 is used to store the program 510. The memory 506 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0135] The program 510 may be specifically called by the processor 502 to enable the heat pump water heater to execute the relevant steps in the above-mentioned control method embodiment for the heat pump water heater.

[0136] It can be understood by those skilled in the art that Fig.10 The structure shown is only for illustration and does not limit the structure of the above-mentioned device. Fig.10 More or fewer components as shown, or with Fig.10 Different configurations are shown.

[0137] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0138] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0139] The specific contents of the above specific embodiments only express several embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A control method for a heat pump water heater, characterized in that: The heat pump water heater comprises a water tank inner tank and a flow-turbulating cleaning device arranged in the water tank inner tank, the flow-turbulating cleaning device comprises a flow-turbulating cleaning wheel, and the flow-turbulating cleaning wheel can move along the axial direction of the water tank inner tank; the outer peripheral surface of the flow-turbulating cleaning wheel abuts against the side wall of the water tank inner tank; the method comprises: When the heat pump water heater is in a heating mode and the first water temperature in the water tank inner tank is lower than the target temperature, controlling the heat pump water heater to heat the water tank inner tank; In response to the time duration of heating the water tank inner tank meeting the first preset time duration, obtaining a second water temperature in the water tank inner tank, and determining a first difference between the condensing temperature of the heat pump water heater and the second water temperature; The operating mode of the heat pump water heater is determined based on the first difference, and the operation of the heat pump water heater is controlled based on the determined operating mode, wherein the operating mode includes at least one of a static heating mode, a disturbance heating mode and a self-cleaning mode.

2. The control method of the heat pump water heater according to claim 1, characterized in that: The determining the operating mode of the heat pump water heater based on the first difference includes: When the first difference is less than a first preset temperature, determining that the working mode of the heat pump water heater is a static heating mode; When the first difference is between the first preset temperature and the second preset temperature, the operation mode of the heat pump water heater is determined to be a disturbance heating mode, and the second preset temperature is greater than the first preset temperature; the disturbance heating mode is characterized by heating the water tank inner tank while causing the water in the water tank inner tank to flow; When the first difference is between the second preset temperature and the third preset temperature, the working mode of the heat pump water heater is determined to be the self-cleaning mode, and the third preset temperature is greater than the second preset temperature; the self-cleaning mode is characterized by cleaning the inside of the water tank.

3. The control method of the heat pump water heater according to claim 2, characterized in that: The heat pump water heater further comprises a transmission member, which is arranged in the water tank inner tank, the transmission member is arranged along the axial direction of the water tank inner tank, and the spoiler cleaning wheel is sleeved on the transmission member; The step of controlling the operation of the heat pump water heater based on the determined operation mode comprises: In response to the working mode being the self-cleaning mode, controlling the spoiler cleaning wheel to move axially along the transmission member a first target number of times; Acquiring a third water temperature in the water tank, and determining a second difference between the condensing temperature of the heat pump water heater and the third water temperature; In response to the second difference being between the second preset temperature and the third preset temperature, the operation mode of the heat pump water heater is again determined to be the self-cleaning mode.

4. The control method of the heat pump water heater according to claim 3, characterized in that: The heat pump water heater further comprises a water outlet pipe, a water outlet pipe solenoid valve, a water inlet pipe, a water inlet pipe solenoid valve, a drain pipe and a drain pipe solenoid valve; the water outlet pipe, the water inlet pipe and the drain pipe are respectively connected to the water tank inner tank, the water outlet pipe solenoid valve is arranged on the water outlet pipe, and is used to control the on-off of the water outlet pipe, the water inlet pipe solenoid valve is arranged on the water inlet pipe, and is used to control the on-off of the water inlet pipe, and the drain pipe solenoid valve is arranged on the drain pipe, and is used to control the on-off of the drain pipe; The method further comprises: In response to the second difference being less than the second preset temperature, controlling the heat pump water heater to turn off the heating mode; The water outlet pipe solenoid valve and the water inlet pipe solenoid valve are controlled to be closed, and the drain pipe solenoid valve is controlled to be opened, so as to discharge the water in the water tank through the drain pipe.

5. The control method of the heat pump water heater according to claim 4, characterized in that: After the control of opening the drain pipe solenoid valve, the method further comprises: Controlling the spoiler cleaning wheel to move axially along the transmission member a second target number of times; In response to the drainage time satisfying the second preset time length, controlling the water inlet pipe solenoid valve to open, and controlling the water inlet pipe solenoid valve to close again after the water inlet pipe solenoid valve opening time satisfies the third preset time length; In response to the closing time of the water inlet pipe solenoid valve meeting a fourth preset time length, controlling the drain pipe solenoid valve to close, and controlling the water inlet pipe solenoid valve to open again; In response to the water volume in the water tank satisfying the target flow rate, the water outlet pipe solenoid valve is controlled to open, and the heat pump water heater is controlled to enter the heating mode again.

6. The control method of the heat pump water heater according to claim 5, characterized in that: The heat pump water heater further comprises a breathing tube and a breathing tube solenoid valve, one end of the breathing tube is connected to the water tank inner tank, and the other end is connected to the external environment, and the breathing tube solenoid valve is arranged on the breathing tube and is used to control the on and off of the breathing tube; After the control of closing the water outlet pipe solenoid valve and the water inlet pipe solenoid valve, the method further includes: Control the breathing tube solenoid valve to open.

7. The control method of the heat pump water heater according to claim 6, characterized in that: The method further comprises: When the amount of water in the water tank inner container meets the target flow rate and the fifth preset time is met, the solenoid valve of the breathing tube is controlled to be closed.

8. The control method of the heat pump water heater according to claim 3, characterized in that: The step of controlling the operation of the heat pump water heater based on the determined operation mode comprises: In response to the working mode being the disturbance heating mode, controlling the disturbance cleaning wheel to move axially along the transmission member; A fourth water temperature in the water tank inner container is obtained, and when the fourth water temperature is greater than or equal to the target temperature, the spoiler cleaning wheel is controlled to move to a preset position.

9. The control method of the heat pump water heater according to claim 2, characterized in that: The heat pump water heater further includes a display panel, and the method further includes: generating a control instruction based on the display panel; In response to the control instruction, the heat pump water heater is controlled to enter the self-cleaning mode.

10. A heat pump water heater, characterized in that: include: A memory, a processor, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the control method of the heat pump water heater according to any one of claims 1 to 9.

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