Water tank structure and heat pump water heater

Abstract

The utility model relates to the technical field of hot water supply equipment, and discloses a water tank structure and a heat pump water heater, the water tank structure comprises a shell, and a water tank liner, a driving component, a transmission part and a cleaning component which are arranged in the shell, and the driving component is in transmission connection with the transmission part; the cleaning assembly is arranged in the water tank inner container and comprises a cleaning wheel connected with the transmission part, and the driving assembly drives the cleaning wheel to move in the axial direction of the water tank inner container through the transmission part; a plurality of protrusions are arranged on the peripheral face of the cleaning wheel and abut against the side wall of the water tank inner container. According to the heat pump water heater, the cleaning wheel, the transmission part and the driving assembly are matched, so that the protrusions on the cleaning wheel can effectively clean scale on the inner wall of the inner container of the water tank, and then the heating efficiency of the heat pump water heater is improved; in addition, only the transmission part and the cleaning wheel need to be arranged in the water tank inner container, the structure is simple, and the usable space in the water tank inner container is effectively enlarged.

Description

Technical Field

[0001] This utility model relates to the field of hot water supply equipment technology, and in particular to a water tank structure and a heat pump water heater. Background Technology

[0002] Heat pump water heaters, also known as air source heat pump water heaters, are widely used due to their energy efficiency. However, due to China's vast territory and complex water quality, scale easily forms in the water tank of heat pump water heaters during use, which affects the heating efficiency and accelerates the lifespan of the heat pump water heater. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a water tank structure that effectively solves the technical problem of low heating efficiency in heat pump water heaters caused by scale formation inside the water tank.

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

[0005] A water tank structure for a heat pump water heater, comprising:

[0006] The housing and a water tank liner disposed within the housing, a drive assembly, a transmission component, and a cleaning assembly, wherein the drive assembly is connected to the transmission component in a transmission manner;

[0007] The cleaning component is disposed inside the inner tank of the water tank. The cleaning component includes a cleaning wheel connected to the transmission component. The driving component drives the cleaning wheel to move axially along the inner tank of the water tank through the transmission component.

[0008] The outer circumferential surface of the cleaning wheel is provided with multiple protrusions, which abut against the side wall of the inner liner of the water tank.

[0009] The water tank structure has the beneficial effects that: the water tank of the heat pump water heater is composed of a shell, a water tank inner container, a driving assembly, a transmission member and a cleaning assembly, the internal components of the water tank are protected by the shell, and the water tank inner container is used to store hot water, the driving assembly is arranged outside the water tank inner container to avoid being damaged by directly contacting the hot water, the cleaning assembly is further arranged in the water tank inner container, the cleaning assembly comprises a cleaning wheel connected with the transmission member, a plurality of protrusions arranged on the outer periphery of the cleaning wheel abut against the side wall of the water tank inner container, so that the protrusions can be in contact with the inner wall of the water tank inner container to the maximum extent, the cleaning wheel exerts a force on the inner wall of the water tank inner container to fix the cleaning wheel in the water tank inner container, and the driving assembly provides a driving force, and the transmission member drives the cleaning wheel to move axially along the water tank inner container to clean the scale in the water tank inner container, the protrusions on the cleaning wheel can effectively clean the scale on the inner wall of the water tank inner container, and the heating efficiency of the heat pump water heater is improved, and the transmission member and the cleaning wheel are arranged in the water tank inner container, so that the structure is simple, and the available space in the water tank inner container is effectively improved.

[0010] In one embodiment, the cleaning wheel comprises a first cleaning wheel and a second cleaning wheel arranged in an upper and lower interval, and the plurality of protrusions on the outer periphery of the first cleaning wheel are arranged in an upper and lower staggered manner with the plurality of protrusions on the outer periphery of the second cleaning wheel.

[0011] Beneficial effects: the first cleaning wheel and the second cleaning wheel are arranged to work cooperatively to clean the water tank inner container, so that more comprehensive and efficient cleaning effect is achieved. The plurality of protrusions on the outer periphery of the first cleaning wheel are arranged in an upper and lower staggered manner with the plurality of protrusions on the outer periphery of the second cleaning wheel, so that the cleaning wheel can scrape the scale more comprehensively in the axial movement process, thereby improving the efficiency of scale removal, and the upper and lower staggered protrusions also have a certain flow disturbance effect, thereby improving the heat exchange efficiency of water flow.

[0012] In one embodiment, the plurality of protrusions are arranged in an interval on the outer periphery of the cleaning wheel, a groove is formed between the two adjacent protrusions, and the length of the protrusion in the circumferential direction is greater than or equal to the length of the groove in the circumferential direction.

[0013] Beneficial effects: By setting a groove between two adjacent protrusions, that is, setting multiple grooves on the outer circumferential side of the cleaning wheel, the outer circumference of the cleaning wheel is not a continuous smooth surface. When the cleaning wheel moves axially, the protrusions on the first cleaning wheel first scrape and clean the inner wall of the water tank liner; secondly, the protrusions on the second cleaning wheel scrape and clean the inner wall of the water tank liner opposite the groove of the first cleaning wheel, thereby comprehensively cleaning the inner wall of the water tank liner, and the scraped scale can fall to the bottom of the water tank liner according to its own weight through the groove to ensure the cleaning effect. By setting the length of the protrusion to be greater than or equal to the length of the groove, sufficient scraping of the inner wall of the water tank liner opposite the groove can be ensured, and residual scale on the inner wall of the water tank liner can be avoided.

[0014] In one of the embodiments, it further includes a water inlet pipe, a water outlet pipe and a drain pipe, all of which are in communication with the water tank liner;

[0015] The cleaning wheel is provided with multiple water passing holes, and the total cross-sectional area of the multiple water passing holes is at least a target multiple of the cross-sectional area of any one of the water inlet pipe, the water outlet pipe and the drain pipe.

[0016] Beneficial effects: By setting the water inlet pipe, the water outlet pipe and the drain pipe, and respectively communicating with the water tank liner, the normal entry, exit and discharge of water flow can be ensured, so that the heat pump water heater can operate normally. Further, multiple water passing holes are provided on the cleaning wheel, which can not affect the normal flow of water during cleaning. By setting the total cross-sectional area of the water passing holes, the obstruction of the water flow by the cleaning wheel can be reduced, the water flow can smoothly pass through the area where the cleaning wheel is located, and the scale can also pass through the water passing holes to fall to the bottom of the water tank liner, which ensures the cleaning function of the cleaning wheel and does not affect the normal water inlet, water outlet and drainage functions of the water tank; moreover, the water passing holes also have a certain flow disturbance effect, effectively improving the heat exchange efficiency of the water flow, reducing the operation time of the condensing temperature, reducing the service period load time of the heat pump water heater, and thereby improving the service life of the heat pump water heater.

[0017] In one of the embodiments, the transmission member includes a transmission screw rod, the transmission screw rod is connected with the driving assembly, and the cleaning wheel is threadedly sleeved on the transmission screw rod and moves axially along the transmission screw rod.

[0018] Beneficial effects: The transmission screw rod is connected with the driving assembly, and the driving assembly provides rotary power for the transmission screw rod. The cleaning wheel is provided with a thread in the middle position, and the cleaning wheel is threadedly sleeved on the transmission screw rod. Since the protrusions have a pressing force against the water tank liner to limit the rotation of the cleaning wheel following the transmission screw rod, when the transmission screw rod rotates, the cleaning wheel moves axially along the water tank liner, thereby cleaning the inner wall of the water tank liner in the axial direction, to realize the function of cleaning the inner wall of the water tank liner.

[0019] In one of the embodiments, the water tank liner comprises a cylindrical segment and an arc segment arranged at both ends of the cylindrical segment, the two ends of the cylindrical segment are respectively provided with a first limiting structure and a second limiting structure, and the cleaning wheel is arranged between the first limiting structure and the second limiting structure.

[0020] Beneficial effects: The first limiting structure and the second limiting structure are respectively arranged at the two ends of the cylindrical segment, and the cleaning wheel is arranged between the first limiting structure and the second limiting structure, which can ensure that the cleaning wheel cleans the inside of the water tank liner in a regular cylindrical segment. The first limiting structure and the second limiting structure arranged at the two ends of the cylindrical segment can ensure that the cleaning action of the cleaning wheel can be continuously and stably performed, avoiding the movement of the cleaning wheel to the arc segment, thereby avoiding damage to other components in the water tank liner due to excessive movement of the cleaning wheel.

[0021] In one of the embodiments, the first limiting structure is arranged at the top end of the cylindrical segment and is sleeved on the transmission member and fixedly connected with the transmission member.

[0022] Beneficial effects: By arranging the first limiting structure at the top end of the cylindrical segment, when the cleaning wheel moves to the first limiting structure, the first limiting structure prevents the cleaning wheel from continuing to move upward and further adjusts the direction of the cleaning wheel, controls the movement of the cleaning wheel away from the first limiting structure, and prevents damage to other components in the water tank liner due to excessive upward movement of the cleaning wheel. Moreover, the first limiting structure is sleeved on the transmission member and fixedly connected with the transmission member, and rotates with the rotation of the transmission member, so that the first limiting structure does not need to be arranged too large, effectively reducing the volume of the first limiting structure, thereby increasing the capacity of the water tank liner.

[0023] In one of the embodiments, a fixing member is further arranged at the bottom of the water tank liner, the second limiting structure is arranged at the bottom of the cylindrical segment and fixedly arranged on the fixing member, and a through hole matched with the transmission member is arranged on the second limiting structure, and the transmission member is arranged in the through hole and abuts against the inner wall of the through hole.

[0024] Beneficial effects: The fixing member is arranged at the bottom of the water tank liner and fixedly connected with the water tank liner, and the second limiting structure is fixedly arranged on the fixing member, so that the second limiting structure is arranged at the bottom of the cylindrical segment. When the cleaning wheel moves to the second limiting structure, the second limiting structure prevents the cleaning wheel from continuing to move downward and further adjusts the direction of the cleaning wheel, controls the movement of the cleaning wheel away from the second limiting structure, thereby ensuring that the cleaning action of the cleaning wheel can be continuously and stably performed, avoiding excessive downward movement of the cleaning wheel to damage other components in the water tank liner.

[0025] Further, a through hole matched with the transmission member is arranged on the second limiting structure, when the transmission member is installed in the through hole, the transmission member can be smoothly placed in the through hole, so that the position of the transmission member is relatively fixed. Then, the transmission member abuts against the inner wall of the through hole, so that the position of the transmission member in the through hole is more accurate, and the transmission member is prevented from deviating during movement.

[0026] In one of the embodiments, a filter is further arranged inside the inner container of the water tank and connected with the water outlet pipe, and the height of the lower end of the filter is not lower than the height of the lower end of the first limiting structure.

[0027] Beneficial effects: By arranging the filter inside the inner container of the water tank and connecting the filter with the water outlet pipe, the water flowing out of the inner container of the water tank passes through the filter before entering the water outlet pipe. In the heat pump water heater, when the hot water flows from the inner container of the water tank to the water outlet pipe through the filter, the filter can intercept the scale or other solid impurities generated in the inner container of the water tank, prevent the impurities in the hot water from blocking the pipeline or affecting the use experience of the hot water, so that the quality of the hot water used by the user can be ensured. The height of the lower end of the filter is set to be not lower than the height of the lower end of the first limiting structure, so that when the cleaning wheel moves to the first limiting structure, the surface of the filter is cleaned by the first cleaning wheel, and the filter can also be prevented from being damaged due to the movement of the cleaning wheel.

[0028] On the other hand, the utility model also provides a kind of heat pump water heater, comprising: the water tank structure as described above. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0030] Figure 1 It is a perspective view of the water tank structure of the utility model embodiment;

[0031] Figure 2 It is Figure 1 It is the front view of the water tank structure shown in the figure;

[0032] Figure 3 It is Figure 1 It is the local enlarged view of part A in the figure.

[0033] EXPLANATION OF REFERENCE NUMERALS:

[0034] 10, shell; 11, water tank liner; 111, cleaning wheel; 1111, first cleaning wheel; 1112, second cleaning wheel; 1113, protrusion; 1114, water passing hole; 1115, groove; 112, first limiting structure; 113, second limiting structure; 114, transmission member; 115, filter; 116, temperature sensor; 117, fixing member; 118, cylindrical segment; 119, camber segment; 12, driving assembly; 13, water outlet pipe; 131, water outlet pipe electromagnetic valve; 14, water inlet pipe; 141, water inlet pipe electromagnetic valve; 142, water flow sensor; 15, drain pipe; 151, drain pipe electromagnetic valve; 16, condenser; 17, breathing pipe; 171, breathing pipe electromagnetic valve. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] The terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0038] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. Figures 1 to 3The embodiment of the utility model discloses.

[0040] According to the embodiment of the utility model, on one hand, as Figure 1 The utility model discloses a water tank structure applied to a heat pump water heater, which comprises a shell 10, a water tank inner container 11 arranged in the shell 10, a driving assembly 12, a transmission member 114 and a cleaning assembly, the driving assembly 12 is in transmission connection with the transmission member 114, the driving assembly 12 is arranged at the top of the water tank inner container 110, the cleaning assembly is arranged inside the water tank inner container 11, the cleaning assembly comprises a cleaning wheel 111 connected with the transmission member 114, the driving assembly 12 drives the cleaning wheel 111 to move along the axial direction of the water tank inner container 11 through the transmission member 114, and the outer circumferential surface of the cleaning wheel 111 is provided with a plurality of protrusions 1113.

[0041] In the embodiment, the water tank of the heat pump water heater is composed of the shell 10, the water tank inner container 11, the driving assembly 12, the transmission member 114 and the cleaning assembly, the internal components of the water tank are protected through the shell 10, and the water tank inner container 11 is used to store hot water, a condenser 16 is further arranged outside the water tank inner container 11 and is used to transfer heat to the water in the water tank inner container 11, the driving assembly 12 is arranged outside the water tank inner container 11, for example, at the top of the water tank inner container 11, so that the driving assembly 12 can be prevented from being damaged by directly contacting hot water, the transmission member 114 is arranged inside the water tank inner container 11, and the power of the driving assembly 12 is transmitted to the cleaning assembly inside the water tank inner container 11 through the transmission member 114.

[0042] The cleaning assembly further comprises the cleaning wheel 111 connected with the transmission member 114, the plurality of protrusions 1113 arranged on the outer circumferential surface of the cleaning wheel 111 abut against the side wall of the water tank inner container 11, so that the protrusions 1113 can be in contact with the inner wall of the water tank inner container 11 to the maximum extent, the cleaning wheel 111 can exert force on the inner wall of the water tank inner container 11, and the cleaning wheel 111 is fixed inside the water tank inner container 11, the driving assembly 12 provides driving force, and the cleaning wheel 111 is driven to move along the axial direction of the water tank inner container 11 through the transmission member 114, so as to clean the scale in the water tank inner container 11, wherein the cleaning wheel 111 can be made of high-thermal-insulation material, the protrusions 1113 on the cleaning wheel 111 can effectively clean the scale on the inner wall of the water tank inner container 11 through the cooperation of the cleaning wheel 111, the transmission member 114 and the driving assembly 12, and the heating efficiency of the heat pump water heater is improved, and only the transmission member 114 and the cleaning wheel 111 need to be arranged inside the water tank inner container 11, so that the structure is simple and the available space inside the water tank inner container 11 is effectively improved.

[0043] In one of the possible implementation manners, the driving assembly 12 can be a stepper motor, an output shaft of the stepper motor is connected with the transmission member 114, and the transmission member 114 can be controlled to rotate clockwise or counterclockwise through the stepper motor. The output shaft of the stepper motor, the transmission member 114, the cleaning wheel 111 and the water tank inner container 11 are coaxially arranged, which can enhance the stability of power transmission and better drive the movement of the cleaning assembly.

[0044] As shown in Figure 2 、 Figure 3 In one of the embodiments, the cleaning wheel 111 includes a first cleaning wheel 1111 and a second cleaning wheel 1112 arranged in an up-down interval, and a plurality of protrusions 1113 on the outer circumferential surface of the first cleaning wheel 1111 are arranged in an up-down staggered manner with the plurality of protrusions 1113 on the outer circumferential surface of the second cleaning wheel 1112.

[0045] In the embodiment, the first cleaning wheel 1111 and the second cleaning wheel 1112 are arranged to work cooperatively to clean the water tank inner container 11, so as to achieve a more comprehensive and efficient cleaning effect. The plurality of protrusions 1113 on the outer circumferential surface of the first cleaning wheel 1111 are arranged in an up-down staggered manner with the plurality of protrusions 1113 on the outer circumferential surface of the second cleaning wheel 1112, so that the cleaning wheel 111 can clean the inner wall of the water tank inner container 11 more comprehensively during the axial movement, thereby improving the efficiency of scale removal. Moreover, the up-down staggered protrusions 1113 also have a certain flow disturbance effect, which can disturb the water in the water tank inner container 11 during the movement of the cleaning wheel 111, thereby improving the heat exchange efficiency of the water flow.

[0046] In one of the embodiments, the plurality of protrusions 1113 are arranged in an interval on the outer circumferential surface of the cleaning wheel 111, a groove 1115 is formed between two adjacent protrusions 1113, and the length of the protrusion 1113 in the circumferential direction is greater than or equal to the length of the groove 1115 in the circumferential direction.

[0047] In the embodiment, the outer periphery of the cleaning wheel 111 is not a continuous smooth surface by setting a groove 1115 between two adjacent protrusions 1113, i.e. multiple grooves 1115 are arranged at intervals on the outer periphery of the cleaning wheel 111. For example, the outer periphery of the cleaning wheel 111 can be jagged. When the cleaning wheel 111 moves axially, the protrusions 1113 on the first cleaning wheel 1111 first scrape and clean the inner wall of the water tank inner container 11; secondly, the protrusions 1113 on the second cleaning wheel 1112 scrape and clean the inner wall of the water tank inner container 11 opposite the groove 1115 of the first cleaning wheel 1111, thereby comprehensively cleaning the inner wall of the water tank inner container 11, and the scraped scale can fall to the bottom of the water tank inner container 11 through the groove 1115 according to its own weight to ensure the cleaning effect. By setting the length of the protrusion 1113 to be greater than or equal to the length of the groove 1115, sufficient scraping of the inner wall of the water tank inner container 11 opposite the groove 1115 can be ensured, and residual scale on the inner wall of the water tank inner container 11 can be avoided.

[0048] In one of the embodiments, the water inlet pipe 14, the water outlet pipe 13 and the drain pipe 15 are further included, all of which are in communication with the water tank inner container 11; the cleaning wheel 111 is provided with multiple water passing holes 1114, and the total cross-sectional area of the multiple water passing 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.

[0049] In the embodiment, the drain pipe 15 is arranged at the bottom of the water tank inner container 11 and is in communication with the water tank inner container 11, for draining the water flow and impurities in the water tank inner container 11; the drain pipe 15 is further provided with a drain pipe electromagnetic valve 151 for controlling the opening and closing of the drain pipe 15. The water inlet pipe 14 is arranged above the drain pipe 15 and is in communication with the water tank inner container 11, for introducing cold water into the water tank inner container 11; the water inlet pipe 14 is further provided with a water inlet pipe electromagnetic valve 141 for controlling the opening and closing of the water inlet pipe 14. The water outlet pipe 13 is arranged at the top of the water tank inner container 11 and is in communication with the water tank inner container 11, for transmitting the water flow in the water tank inner container 11 to the water use end; the water outlet pipe 13 is further provided with a water outlet pipe electromagnetic valve 131 for controlling the opening and closing of the water outlet pipe 13. By arranging the water inlet pipe 14, the water outlet pipe 13 and the drain pipe 15 and respectively communicating them with the water tank inner container 11, the normal inlet and outlet and discharge of the water flow can be ensured, so that the heat pump water heater can operate normally. Further, the water inlet pipe 14 is further provided with a water flow sensor 142 for calculating the water flow into the water tank inner container 11; the water tank inner container 11 is further provided with a temperature sensor 116 for detecting the water temperature of the water tank inner container 11; and the water temperature and the water flow are fed back to the heat pump water heater for subsequent decision-making.

[0050] A plurality of water passing holes 1114 are arranged on the cleaning wheel 111, which can not affect the normal flow of water during the cleaning process. The target multiple can be 1.5 times, 2 times, 2.5 times, 3 times, etc., which can be set according to actual use requirements, and is not limited specifically. By setting the total cross-sectional area of the water passing holes 1114, the water flow can be smoothly passed through the area where the cleaning wheel 111 is located, and the water scale can also pass through the water passing holes 1114 to fall to the bottom of the inner tank 11 of the water tank, which not only ensures the cleaning function of the cleaning wheel 111, but also does not affect the normal water inlet, water outlet and drainage functions of the water tank. Moreover, the water passing holes 1114 also have a certain flow disturbance effect, effectively improving the heat exchange efficiency of the water flow, reducing the operation time of the condensation temperature, reducing the use period load time of the heat pump water heater, and thereby improving the use period life of the heat pump water heater.

[0051] In one of the possible ways, the total cross-sectional area of the water passing holes 1114 is at least 2 times the cross-sectional area of any one of the water inlet pipe 14, the water outlet pipe 13 and the drainage pipe 15, or the total cross-sectional area of the water passing holes 1114 is at least 2 times the total cross-sectional area of the water inlet pipe 14, the water outlet pipe 13 and the drainage pipe 15. If the cross-sectional area of the water passing holes 1114 is too small, the cleaning wheel 111 can hinder the water flow during the normal water inlet, water outlet or drainage of the water tank inner tank 11. For example, assuming that the cross-sectional area of the water inlet pipe 14 is S, and the total cross-sectional area of the water passing holes 1114 is 0.5S, when water enters the water tank inner tank 11 from the water inlet pipe 14 at a certain flow rate, the cleaning wheel 111 will hinder the water flow, causing the water inlet speed to slow down, and even possibly causing abnormal changes in the water pressure inside the water tank. If the total cross-sectional area of the water passing holes 1114 is 2 times the cross-sectional area of the water inlet pipe 14, the cleaning wheel 111 will have little hindrance to the water flow, and the water can smoothly pass through the area where the cleaning wheel 111 is located, which not only ensures the cleaning function of the cleaning wheel 111, but also does not affect the normal water inlet, water outlet and drainage functions of the water tank.

[0052] In one embodiment, the transmission member 114 includes a transmission screw rod, the transmission screw rod is connected with the driving assembly 12, and the cleaning wheel 111 is threadedly sleeved on the transmission screw rod and moves axially along the transmission screw rod.

[0053] In the embodiment, one end of the transmission member 114 is connected with the output shaft of the stepping motor, and the other end is connected with the second limiting device; the transmission screw is connected with the driving assembly 12, and the transmission screw is provided with rotating power by the driving assembly 12. The transmission member 114 is a transmission screw, and the transmission screw is provided with external threads; the middle position of the cleaning wheel 111 is provided with threads and matched with the external threads of the transmission screw; the cleaning wheel 111 is threadedly sleeved on the transmission screw, and the cleaning wheel 111 is prevented from rotating along with the transmission screw due to the abutting force between the protrusion 1113 and the water tank inner container 11, so that when the transmission screw rotates, the cleaning wheel 111 moves along the axial direction of the water tank inner container 11, thereby cleaning the inner wall of the water tank inner container 11 in the axial direction, so as to realize the function of cleaning the inner wall of the water tank inner container 11.

[0054] In one of the embodiments, the water tank inner container 11 includes a cylindrical segment 118 and arc segments 119 arranged at both ends of the cylindrical segment 118, and the two ends of the cylindrical segment 118 are respectively provided with the first limiting structure 112 and the second limiting structure 113, and the cleaning wheel 111 is arranged between the first limiting structure 112 and the second limiting structure 113.

[0055] In the embodiment, the first limiting structure 112 and the second limiting structure 113 are arranged at the two ends of the cylindrical segment 118 respectively, and the cleaning wheel 111 is arranged between the first limiting structure 112 and the second limiting structure 113, so as to ensure that the cleaning wheel 111 cleans the inside of the water tank inner container 11 in the regular cylindrical segment 118, and the first limiting structure 112 and the second limiting structure 113 arranged at the two ends of the cylindrical segment 118 can ensure that the cleaning action of the cleaning wheel 111 can be continuously and stably performed, so as to avoid that the cleaning wheel 111 moves to the arc segment 119, thereby avoiding that other components in the water tank inner container 11 are damaged due to excessive movement of the cleaning wheel 111.

[0056] In one of the embodiments, the first limiting structure 112 is arranged at the top end of the cylindrical segment 118 and is sleeved on the transmission member 114 and fixedly connected with the transmission member 114.

[0057] In the embodiment, the first limiting structure 112 is arranged at the top end of the cylindrical segment 118, when the cleaning wheel 111 moves to the first limiting structure 112, the first limiting structure 112 prevents the cleaning wheel 111 from continuing to move upward, and further adjusts the direction of the cleaning wheel 111, controls the cleaning wheel to move away from the first limiting structure 112, and prevents other components in the water tank inner container 11 from being damaged due to excessive upward movement of the cleaning wheel 111. Moreover, the first limiting structure 112 is sleeved on the transmission member 114 and fixedly connected with the transmission member 114, and rotates along with the rotation of the transmission member 114, so that the first limiting structure 112 does not need to be arranged too large, the volume of the first limiting structure 112 is effectively reduced, and the capacity of the water tank inner container 11 is increased.

[0058] In one of the embodiments, the fixing member 117 is fixedly arranged at the bottom of the water tank inner container 11, and the second limiting structure 113 is arranged at the bottom of the cylindrical segment 118 and fixedly arranged on the fixing member 117; the second limiting structure 113 is provided with a through hole matched with the transmission member 114, and the transmission member 114 is arranged in the through hole and abuts against the inner wall of the through hole.

[0059] In the embodiment, the fixing member 117 is arranged at the bottom of the water tank inner container 11 and fixedly connected with the water tank inner container 11, and the second limiting structure 113 is fixedly arranged on the fixing member 117, so that the second limiting structure 113 is arranged at the bottom of the cylindrical segment 118. When the cleaning wheel 111 moves to the second limiting structure 113, the cleaning wheel 111 is prevented from continuing to move downward by the blocking of the second limiting structure 113, and the direction of the cleaning wheel 111 is further adjusted to control the cleaning wheel 111 to move away from the second limiting structure 113. Thus, the cleaning action of the cleaning wheel 111 can be continuously and stably performed, and the cleaning wheel 111 is prevented from excessively moving downward to damage other components in the water tank inner container 11.

[0060] Further, the through hole matched with the transmission member 114 is arranged on the second limiting structure 113, so that when the transmission member 114 is installed in the through hole, the transmission member 114 can be smoothly placed in the through hole, thereby ensuring that the position of the transmission member 114 is relatively fixed. The transmission member 114 abuts against the inner wall of the through hole to ensure that the position of the transmission member 114 in the through hole is more accurate and prevent the transmission member 114 from deviating during movement. For example, when the transmission member 114 is driven, the transmission member 114 abutting against the inner wall of the through hole can limit the displacement of the transmission member 114 in the radial direction, so that the rotational movement of the transmission member 114 is more stable, thereby ensuring that the cleaning wheel 111 can better move along the axial direction of the transmission member 114.

[0061] Further, since the driving assembly 12 is a stepping motor, when the cleaning wheel 111 is controlled to reach the first limiting structure 112, the cleaning wheel 111 cannot continue to move upward, at this time, the number of steps counted by the stepping motor is reset to zero, and then the cleaning wheel 111 is controlled to move away from the first limiting structure 112. Similarly, when the cleaning wheel 111 is controlled to reach the second limiting structure 113, the number of steps counted by the stepping motor is also reset to zero, and then the cleaning wheel 111 is controlled to move away from the second limiting structure 113. By resetting the number of steps counted by the stepping motor when the cleaning wheel 111 moves to the first limiting structure 112 or the second limiting structure 113, the accuracy of the number of steps can be corrected to prevent cumulative errors.

[0062] In one of the embodiments, a filter 115 is further included, which is arranged inside the water tank inner container 11 and communicates with the water outlet pipe 13, and the lower end of the filter 115 is not lower than the lower end of the first limiting structure 112.

[0063] In the embodiment, the filter 115 is arranged inside the water tank inner container 11 and communicates with the water outlet pipe 13, so that the water flowing out of the water tank inner container 11 passes through the filter 115 before entering the water outlet pipe 13; in the heat pump water heater, when the hot water flows from the water tank inner container 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 inner container 11, so as to prevent the impurities in the hot water from blocking the pipeline or affecting the use experience of the hot water, thereby ensuring the quality of the hot water used by the user. The lower end of the filter 115 is arranged to be not lower than the lower end of the first limiting structure 112, so that when the cleaning wheel 111 moves to the first limiting structure 112, the surface of the filter 115 is cleaned by the first cleaning wheel 1111, and the filter 115 can also be prevented from being damaged due to the movement of the cleaning wheel 111.

[0064] Further, a breathing pipe 17 and a breathing pipe electromagnetic valve 171 are further included, the breathing pipe electromagnetic valve 171 is arranged on the breathing pipe 17 and is used for controlling the opening and closing of the breathing pipe 17. One end of the breathing pipe 17 communicates with the water outlet pipe 13, and the other end communicates with the atmosphere; when the water is drained through the drain pipe 15, the breathing pipe 17 is opened to accelerate the drainage speed.

[0065] In one of the embodiments, the surface of the cleaning wheel 111 opposite to the filter 115 is further provided with a brush for cleaning the scale on the filter 115.

[0066] In the embodiment, after the heat pump water heater is operated for a period of time, scale is easily formed on the surface of the filter 115, and then gradually blocks the filter screen of the filter 115, thereby affecting the filtering effect. In the embodiment, the brush is arranged on the surface of the cleaning wheel 111 opposite to the filter 115, so that when the cleaning wheel 111 moves to the first limiting structure 112 in the working process, the brush moves together with the cleaning wheel 111 in a circular motion manner to sweep the surface of the filter 115, so as to brush off the scale on the surface of the filter 115. The filter 115 is cleaned by the brush on the cleaning wheel 111, so that the frequency of manual cleaning of the filter 115 can be reduced. Moreover, since the brush is integrated with the cleaning wheel 111, the filter 115 can be cleaned at the same time when the water tank inner container 11 is cleaned, so that the cleaning work is more efficient and convenient.

[0067] According to the embodiments of the utility model, on the other hand, a heat pump water heater is further provided, including: the water tank structure as above.

[0068] In the specific contents of the foregoing specific embodiments, each technical feature can be combined arbitrarily without contradiction. In order to make the description simple, all possible combinations of the foregoing technical features are not described, however, as long as the combination of the technical features does not exist contradiction, it should be considered that it is within the scope of the description.

[0069] The specific contents of the foregoing specific embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A water tank structure for a heat pump water heater, characterized by, The shell (10) and the water tank liner (11), the drive assembly (12), the transmission member (114) and the cleaning assembly arranged in the shell, the drive assembly (12) is in transmission connection with the transmission member (114); The cleaning assembly is arranged inside the water tank liner (11), the cleaning assembly includes a cleaning wheel (111) connected with the transmission member (114), and the drive assembly (12) drives the cleaning wheel (111) to move along the axial direction of the water tank liner (11) through the transmission member (114); The outer circumferential surface of the cleaning wheel (111) is provided with a plurality of protrusions (1113), and the protrusions (1113) abut against the side wall of the water tank liner (11). The cleaning wheel (111) includes a first cleaning wheel (1111) and a second cleaning wheel (1112) arranged in an upper and lower spaced manner, the plurality of protrusions (1113) on the outer circumferential surface of the first cleaning wheel (1111) are arranged in an upper and lower staggered manner with the plurality of protrusions (1113) on the outer circumferential surface of the second cleaning wheel (1112).

2. The water tank structure according to claim 1, characterized by A plurality of the protrusions (1113) are arranged in a spaced manner on the outer circumferential surface of the cleaning wheel (111), and a groove (1115) is formed between adjacent two protrusions (1113), and the length of the protrusion (1113) in the circumferential direction is greater than or equal to the length of the groove (1115) in the circumferential direction.

3. The water tank structure according to claim 2, characterized by The transmission member (114) includes a transmission screw rod connected with the drive assembly (12), the cleaning wheel (111) is threadedly sleeved on the transmission screw rod and moves axially along the transmission screw rod.

4. The water tank structure according to claim 1, characterized by The water tank liner (11) includes a cylindrical segment (118) and an arc segment (119) arranged at both ends of the cylindrical segment (118), the two ends of the cylindrical segment (118) are respectively provided with a first limiting structure (112) and a second limiting structure (113), and the cleaning wheel (111) is arranged between the first limiting structure (112) and the second limiting structure (113).

5. The water tank structure according to claim 1, characterized by The first limiting structure (112) is arranged at the top end of the cylindrical segment (118) and is sleeved on the transmission member (114) and fixedly connected with the transmission member (114).

6. The water tank structure according to claim 5, characterized by Further comprising a fixing member (117) fixedly arranged at the bottom of the water tank liner (11), the second limiting structure (113) is arranged at the bottom of the cylindrical segment (118) and fixedly arranged on the fixing member (117); the second limiting structure (113) is provided with a through hole matched with the transmission member (114), the transmission member (114) is arranged in the through hole and abuts against the inner wall of the through hole.

7. The water tank structure according to claim 5, characterized by Further comprising a water inlet pipe (14), a water outlet pipe (13) and a drain pipe (15) all in communication with the water tank liner (11); 8. The water tank structure according to claim 5, characterized by The cleaning wheel (111) is provided with a plurality of water passing holes (1114), and the sum of the cross-sectional areas of the plurality of water passing 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). ​ 9. The water tank structure according to claim 8, characterized by The water tank further comprises a filter (115) arranged inside the inner container (11) and connected to the water outlet pipe (13), and the lower end of the filter (115) is not lower than the lower end of the first limiting structure (112).

10. A heat pump water heater, characterized by, The water tank structure according to any one of claims 1 to 9. The water tank structure according to any one of claims 1 to 9.

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