Water heater

Abstract

The water heater comprises a machine body, a blow-down valve, a cover body and a linkage assembly, and the machine body is provided with a water storage cavity and a drain outlet communicated with the water storage cavity; the blow-down valve is arranged on the machine body and is connected with the blow-down The cover body is movably mounted on the machine body and used for shielding the blow-down valve, and when the cover body is in an open state, the blow-down valve is exposed; the linkage assembly is configured to drive the blow-down valve to be opened when the cover body is in the open state. According to the water heater, when the cover body is opened, the blow-down valve can be opened at the same time, so that blow-down is achieved, operation is convenient, and use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a water heater. Background Art

[0002] After the electric water heater has been running for a long time, the magnesium slag produced after the surface of the magnesium rod is corroded will be deposited at the bottom of the inner tank. At the same time, scale is formed on the inner wall of the inner tank, and the scale falls off and is deposited at the bottom of the inner tank. The long-term deposition of magnesium slag and scale in the inner tank will affect the water quality and further affect the health of the user. For this reason, the existing electric water heater is generally provided with a drain valve, and the user can clean the magnesium slag, scale and stale water by opening the drain valve. In order to ensure aesthetics, in the related art, the electric water heater is provided with a cover body that covers the drain valve. However, when it is necessary to drain sewage, it is necessary to open the cover body first and then open the drain valve to drain sewage, which is cumbersome to operate and inconvenient to use. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a water heater, which can open the sewage valve at the same time when the cover is opened to achieve sewage discharge, and is easy to operate and use.

[0004] The water heater according to an embodiment of the present invention includes a body, provided with a water storage chamber and a sewage outlet connected to the water storage chamber; a sewage valve installed on the body and connected to the sewage outlet; a cover body, movably installed on the body and used to cover the sewage valve, when the cover body is in an open state, the sewage valve is exposed; and a linkage assembly, configured to drive the sewage valve to open when the cover body is in an open state.

[0005] The water heater according to the embodiment of the present invention has at least the following beneficial effects: by providing a cover to cover the drain valve, the aesthetics is improved, and the drain valve can be exposed when the cover is in an open state. At the same time, by providing a linkage component, when the cover is in an open state and the drain valve is exposed, the linkage component can open the drain valve. Therefore, when it is necessary to drain sewage, it is only necessary to open the cover to expose the drain valve, and the linkage component can open the drain valve at the same time, thereby achieving sewage discharge, so as to clean the magnesium slag, scale and stale water in the water storage chamber, etc., which is easy to operate and convenient to use.

[0006] According to some embodiments of the present invention, the sewage valve includes a valve body and a valve core, the valve body is provided with a sewage channel, the valve core is arranged in the sewage channel, the linkage assembly includes a first transmission member and a second transmission member, the first transmission member is connected to the valve core and is used to drive the valve core to open or block the sewage channel, the second transmission member is installed on the cover body and cooperates with the first transmission member in transmission, and the cover body is configured to drive the valve core to open the sewage channel when opened.

[0007] According to some embodiments of the present invention, the body further includes a cover body, which is disposed on the drain valve, and the cover body is provided with a through hole, and the through hole is configured to expose the drain valve to the outside of the cover body, and the cover body is movably connected to the cover body and is used to cover the through hole.

[0008] According to some embodiments of the present invention, the first transmission member is rotatably mounted on the valve body, the cover body is slidably mounted on the cover body, and the second transmission member is configured to slide along with the cover body to drive the first transmission member to rotate.

[0009] According to some embodiments of the present invention, one of the first transmission member and the second transmission member is provided with a first slide groove, and the other is provided with a connecting portion accommodated in the first slide groove, and the connecting portion is configured to slideably cooperate with the first slide groove along the length direction of the first slide groove.

[0010] According to some embodiments of the present invention, the water heater also includes a controller and a sensor, the sensor is used to detect the open state or closed state of the cover body, the controller is connected to the sensor signal, the controller includes a high-voltage power supply module and a low-voltage power supply module, the high-voltage power supply module is electrically connected to the heating element of the water heater, the low-voltage power supply module is electrically connected to the sensor, and the controller is used to obtain the signal from the sensor detecting that the cover body is in an open state to control the high-voltage power supply module to disconnect.

[0011] According to some embodiments of the present invention, the drain valve is configured as an electric valve, the linkage assembly includes a controller and a sensor, the controller is connected to the drain valve and the sensor signal, the sensor is used to detect the open state or closed state of the cover body, and the controller is used to obtain the signal when the sensor detects that the cover body is in the open state to control the opening of the drain valve.

[0012] According to some embodiments of the present invention, the controller includes a high-voltage power supply module and a low-voltage power supply module, the high-voltage power supply module is electrically connected to the heating element of the water heater, and the low-voltage power supply module is electrically connected to the drain valve and the sensor, and the controller is used to obtain the signal when the sensor detects that the cover body is in an open state to control the high-voltage power supply module to disconnect.

[0013] According to some embodiments of the present invention, the sewage valve includes a valve body, a valve core and a driving member, the valve body is provided with a sewage channel, the valve core is arranged in the sewage channel, the driving member is installed on the valve body and connected to the valve core, the driving member is used to drive the valve core to open or block the sewage channel, the inner wall of the sewage channel includes a sealing wall surface, the outer wall of the valve core includes an end face and a side surface arranged around the end face, and the side surface is sealed with the sealing wall surface.

[0014] According to some embodiments of the present invention, the valve core is slidably mounted on the valve body along the radial direction of the sewage discharge channel; or, the valve core is rotatably mounted on the valve body, and the rotation axis of the valve core is arranged along the radial direction of the sewage discharge channel.

[0015] According to some embodiments of the present invention, the valve core is configured as a plate-like structure or a columnar structure.

[0016] According to some embodiments of the present invention, the valve core is configured as a plate-like structure and is rotatably installed in the sewage channel, the rotation axis of the plate-like structure is perpendicular to the thickness direction of the plate-like structure, and the rotation axis of the plate-like structure is arranged along the radial direction of the sewage channel, and the side surface of the plate-like structure is configured to interfere with the inner wall of the sewage channel for sealing.

[0017] According to some embodiments of the present invention, the valve core is configured as a cylindrical structure, the sewage channel includes a main channel and an installation channel, the installation channel is arranged along the radial direction of the main channel and is connected to the main channel, the cylindrical structure is rotatably installed on the installation channel, the rotation axis of the cylindrical structure coincides with the center axis of the cylindrical structure and is arranged along the radial direction of the main channel, the outer circumferential wall of the cylindrical structure is configured to be in contact with the inner circumferential wall of the installation channel for sealing cooperation, the cylindrical structure is provided with a first flow hole, both ends of the first flow hole penetrate the outer circumferential wall of the cylindrical structure along the radial direction of the cylindrical structure, and the first flow hole is configured to make the main channel conductive when the sewage valve is opened.

[0018] According to some embodiments of the present invention, the valve body is provided with a second slide groove, which is located on a radial side of the sewage channel and is connected to the sewage channel. The valve core is slidably installed in the second slide groove so that the side surface of the valve core contacts or moves away from the inner wall of the sewage channel, and the end face of the valve core is sealed with the inner wall of the second slide groove.

[0019] According to some embodiments of the present invention, the inner wall of the sewage discharge channel is provided with a groove, the valve core is accommodated in the groove, and the side surface of the valve core contacts the groove wall of the groove to form a sealing fit.

[0020] According to some embodiments of the present invention, the driving member is threadedly connected to the valve body, an end of the driving member is rotationally matched with the valve core, and a rotation axis of the driving member is arranged along a sliding direction of the valve core.

[0021] According to some embodiments of the present invention, the valve body includes a partition located in the sewage channel, the partition divides the sewage channel into a first channel and a second channel, the sewage channel also includes a second flow hole provided on the partition, the second flow hole connects the first channel and the second channel, the valve body is provided with a third slide groove, the third slide groove is located on a radial side of the sewage channel and is connected to the first channel or the second channel, and the valve core is slidably installed in the third slide groove to block or open the second flow hole.

[0022] According to some embodiments of the present invention, the side wall of the valve core is configured as a conical surface and contacts the inner wall of the second flow hole to form a sealing fit, and the small end of the conical surface is closer to the second flow hole than the large end.

[0023] According to some embodiments of the present invention, the driving member is threadedly connected to the valve body, and the rotation axis of the driving member is arranged along the sliding direction of the valve core, and the driving member is fixedly connected or rotationally matched with the valve body.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 is a bottom view of a water heater according to an embodiment of the present invention; Figure 2 is a cross-sectional view of a water heater according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a cover body in an embodiment of the present invention; Figure 4 It is a schematic diagram of the partial structure of the water heater in the embodiment of the present invention when the linkage assembly is a mechanical linkage structure and the cover is in a closed state; Figure 5 It is a schematic diagram of the partial structure of the water heater in the embodiment of the present invention when the linkage assembly is a mechanical linkage structure and the cover is in an open state; Figure 6 It is a schematic diagram of the partial structure of the water heater in the embodiment of the present invention when the linkage assembly is an electric control linkage structure and the cover is in a closed state; Figure 7 It is a schematic diagram of the partial structure of the water heater in the embodiment of the present invention when the linkage assembly is an electric control linkage structure and the cover is in an open state; Figure 8 is a cross-sectional view of the drain valve in a closed state when the drain valve is a butterfly valve in an embodiment of the present invention; Fig. 9is a cross-sectional view of the drain valve in an open state when the drain valve is a butterfly valve in an embodiment of the present invention; Fig.10 is a cross-sectional view of a valve body when the sewage valve is a plug valve in an embodiment of the present invention; Fig.11 is a cross-sectional view of the drain valve in the embodiment of the present invention when the drain valve is a plug valve and the drain valve is in a closed state; Fig.12 is a cross-sectional view of the drain valve in an open state when the drain valve is a plug valve in an embodiment of the present invention; Fig.13 is a cross-sectional view of the drain valve in a closed state when the drain valve is a gate valve in an embodiment of the present invention; Fig.14 is a cross-sectional view of the drain valve in an open state when the drain valve is a gate valve in an embodiment of the present invention; Fig.15 is a cross-sectional view of the drain valve in the embodiment of the present invention when the drain valve is a stop valve and the drain valve is in a closed state; Fig.16 It is a cross-sectional view of the drain valve in the embodiment of the present invention when the drain valve is a stop valve and the drain valve is in an open state.

[0026] Body 100; water storage chamber 110; heating element 120; water inlet pipe 130; water outlet pipe 140; water inlet connector 150; water outlet connector 160; Drain valve 200; valve body 210; drain channel 211; main channel 2111; installation channel 2112; groove 2113; second slide groove 2114; first channel 2115; second channel 2116; second flow hole 2117; sealing wall 2118; third slide groove 2119; partition 220; valve core 230; end surface 231; side surface 232; first flow hole 233; driving member 240; Outer cover assembly 300; cover body 310; through hole 311; avoidance hole 312; cover body 320; Linkage assembly 400 ; first transmission member 410 ; first slide slot 411 ; second transmission member 420 ; connection portion 421 ; sensor 430 . DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 invention.

[0029] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, assembling, and matching should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] After the electric water heater has been running for a long time, the magnesium slag produced after the surface of the magnesium rod is corroded will be deposited at the bottom of the inner tank. At the same time, scale is formed on the inner wall of the inner tank, and the scale falls off and is deposited at the bottom of the inner tank. The long-term deposition of magnesium slag and scale in the inner tank will affect the water quality and further affect the health of the user. For this reason, the existing electric water heater is generally provided with a drain valve, and the user can clean the magnesium slag, scale and stale water by opening the drain valve. In order to ensure aesthetics, the existing electric water heater is provided with a cover body covering the drain valve. However, when it is necessary to drain sewage, it is necessary to open the cover body first and then open the drain valve to drain sewage, which is cumbersome to operate and inconvenient to use.

[0032] For this purpose, refer to Figures 1 to 16 As shown, an embodiment of the present invention provides a water heater, which is an electric water heater. The water heater includes a body 100, a drain valve 200, an outer cover assembly 300 and a linkage assembly 400. Reference Figure 1 and Figure 2As shown, it can be understood that the body 100 is roughly cylindrical and arranged horizontally, that is, the central axis of the cylindrical body 100 is arranged horizontally. The body 100 is provided with a water storage chamber 110 and a drain outlet. The water storage chamber 110 is an inner tank and is used to store hot water. The drain outlet is used to clean up stale water, scale, magnesium slag, etc. The drain outlet is arranged at the bottom of the body 100 and communicated with the water storage chamber 110, so as to better clean up stale water, scale, magnesium slag and other foreign matter. The drain valve 200 is installed at the bottom of the body 100 and connected to the drain outlet. The drain valve 200 can be a valve body 210 such as a ball valve, a butterfly valve, a plug valve, a gate valve, a stop valve, etc. When the drain valve 200 is opened, the stale water, scale, magnesium slag and other foreign matter in the water storage chamber 110 can be cleaned out through the drain outlet and the drain valve 200. It is easy to understand that during the operation of the water heater, the drain valve 200 is in a closed state to avoid water leakage.

[0033] Reference Figure 2 As shown, it can be understood that, generally speaking, a heating element 120 is installed in the water storage chamber 110, and the heating element 120 is used to heat the water in the water storage chamber 110. The body 100 is also provided with a water inlet and a water outlet, the water inlet and the water outlet are located on one side of the sewage outlet, and the water inlet and the water outlet are both arranged at the bottom of the body 100 and communicated with the water storage chamber 110. Among them, an upwardly extending water inlet pipe 130 is installed at the water inlet, and an upwardly extending water outlet pipe 140 is installed at the water outlet, the upper end of the water inlet pipe 130 extends to the middle height position of the water storage chamber 110, and the upper end of the water outlet pipe 140 extends to a position close to the top of the water storage chamber 110, and the upper end of the water outlet pipe 140 is higher than the upper end of the water inlet pipe 130.

[0034] Reference Figure 1 and Figure 2 As shown, it can be understood that a water inlet joint 150 and a water outlet joint 160 are also installed at the bottom of the body 100, wherein the water inlet joint 150 is located at the water inlet and connected to the water inlet pipe 130, and the water outlet joint 160 is located at the water outlet and connected to the water outlet pipe 140. The water inlet joint 150 is used to connect to the tap water supply end, and the water outlet joint 160 is used to connect to the faucet, shower, etc. at the user end. Therefore, cold water can be supplied to the water storage chamber 110 through the water inlet joint 150 and the water inlet pipe 130, and hot water can be transported to the faucet, shower, etc. at the user end through the water outlet pipe 140 and the water outlet joint 160, so as to realize the supply of hot water.

[0035] Reference Figure 1 and Figure 2As shown, it can be understood that the outer cover assembly 300 is installed at the bottom of the fuselage 100. Specifically, the outer cover assembly 300 includes a cover body 310 and a cover body 320, wherein the cover body 310 opens upward and is fixedly connected to the fuselage 100, for example, the cover body 310 is fixedly connected to the fuselage 100 by a snap-fit ​​structure, screws, etc. The cover body 310 is covered on the drain valve 200, and the cover body 310 is provided with a through hole 311, and the through hole 311 is arranged corresponding to the drain valve 200 in the up and down direction, and the drain valve 200 is exposed to the outside of the cover body 310 through the through hole 311.

[0036] Reference Figures 2 to 5 As shown, it can be understood that the cover 320 is movably connected to the cover 310 and is located at the through hole 311. For example, the cover 320 is slidably connected to the cover 310, or the cover 320 is rotatably connected to the cover 310. The cover 320 is used to cover the through hole 311, that is, the cover 320 serves as a switch door structure at the through hole 311. When the cover 320 is closed, the cover 320 covers the through hole 311, so that the drain valve 200 is hidden in the cover 310, thereby improving the aesthetics. When the cover 320 is opened, the drain valve 200 is exposed to the outside of the cover 310 through the through hole 311. After the drain valve 200 is opened, the stale water, scale, magnesium slag and other foreign matter in the water storage chamber 110 can be discharged to the outside of the water heater through the drain valve 200 and the through hole 311.

[0037] Reference Figure 2 As shown, it can be understood that, in order to further improve the aesthetics, the cover body 310 is also provided with two avoidance holes 312, the two avoidance holes 312 are located on one side of the through hole 311, and the water inlet joint 150 and the water outlet structure are respectively correspondingly penetrated through the two avoidance holes 312, so that a part of the structure of the water inlet joint 150 and a part of the structure of the water outlet joint 160 are hidden in the cover body 310, and another part of the water inlet joint 150 and another part of the structure of the water outlet joint 160 are respectively extended out of the cover body 310 through the two avoidance holes 312, so that the water inlet joint 150 and the water outlet joint 160 are respectively connected to the water pipe. Therefore, under the premise of not affecting the connection between the water inlet joint 150 and the water outlet joint 160 and the water pipe, the cover body 310 and the cover body 320 cover the drain valve 200, a part of the structure of the water inlet joint 150 and a part of the structure of the water outlet joint 160, so that the bottom of the water heater is more regular, which is conducive to improving the aesthetics.

[0038] In other embodiments, it is understandable that the outer cover assembly 300 may only include a cover body 320, and the cover body 320 is movably connected to the fuselage 100, for example, the cover body 320 is slidably or rotatably installed on the fuselage 100 to cover the drain valve 200 or expose the drain valve 200 when the cover body 320 is opened.

[0039] It is understandable that the linkage assembly 400 is used to link the opening and closing state of the cover body 320 with the opening and closing state of the drain valve 200. Specifically, when the cover body 320 is in the open state, the linkage assembly 400 opens the drain valve 200 to clean up foreign matter such as stale water, scale, and magnesium slag. Generally speaking, when the cover body 320 is in the closed state, the linkage assembly 400 closes the drain valve 200 to prevent water leakage.

[0040] It can be understood that the linkage assembly 400 can be a mechanical linkage structure and connected between the cover body 320 and the drain valve 200. For example, the cover body 320 and the valve of the drain valve 200 are connected by multiple connecting rods. In the process of opening the cover body 320, the cover body 320 moves and drives the valve to move through the connecting rod to open the drain valve 200. In the process of closing the cover body 320, the cover body 320 drives the valve to reset through the connecting rod to close the drain valve 200.

[0041] It is understandable that the linkage assembly 400 can also be an electrically controlled linkage structure, that is, the switch of the drain valve 200 is controlled by detecting the opening and closing signal of the cover body 320. For example, the drain valve 200 is set as a solenoid valve, the opening and closing signal of the cover body 320 is detected by the sensor, and the opening and closing signal of the cover body 320 is obtained by the control system of the water heater to control the switch of the drain valve 200. When the sensor detects that the cover body 320 is opened, the control system controls the drain valve 200 to open, and when the sensor detects that the cover body 320 is closed, the control system controls the drain valve 200 to close.

[0042] Therefore, when sewage needs to be discharged, it is only necessary to open the cover body 320 so that the sewage valve 200 is exposed through the through hole 311 on the cover body 310, and the sewage valve 200 can be opened at the same time by relying on the linkage assembly 400. There is no need to manually open the sewage valve 200, so that the stale water, scale, magnesium slag and other foreign matters in the water storage chamber 110 are discharged through the sewage valve 200 and the through hole 311, thereby cleaning the water storage chamber 110. The operation is convenient and easy to use.

[0043] Reference Figure 2 , Figure 8 and Fig. 9 As shown, it can be understood that the sewage valve 200 includes a valve body 210, a valve core 230 and a driving member 240, wherein the valve body 210 is provided with a sewage channel 211, and the sewage channel 211 is communicated with the water storage chamber 110. The valve core 230 is arranged in the sewage channel 211, and the driving member 240 is a rod-shaped structure and is installed with the valve body 210. The driving member 240 is connected to the valve core 230 and is used to drive the valve core 230 to open or block the sewage channel 211.

[0044] Reference Figure 8 and Fig. 9As shown, it can be understood that, specifically, the driving member 240 is rotatably mounted on the valve body 210, and the rotation axis of the driving member 240 is arranged along the radial direction of the sewage channel 211, specifically, the rotation axis of the driving member 240 is arranged along the left-right direction. The valve core 230 is fixedly connected to the driving member 240 and rotatably arranged in the sewage channel 211. Therefore, by driving the valve core 230 to rotate at different angles through the driving member 240, the valve core 230 can open or block the sewage channel 211.

[0045] In other embodiments, the driving member 240 is connected to the valve body 210 by threads, that is, the valve core 230 and the valve body 210 are also rotationally matched, and the valve core 230 and the driving member 240 are rotationally matched. Therefore, when the driving member 240 is rotated, the driving member 240 drives the valve core 230 to extend into or move out of the sewage channel 211 to open or block the sewage channel 211.

[0046] Reference Figure 4 and Figure 5 As shown, it can be understood that the linkage assembly 400 is a mechanical linkage structure. The linkage assembly 400 includes a first transmission member 410 and a second transmission member 420, both of which are roughly rod-shaped structures, wherein the first transmission member 410 is fixedly connected to the driving member 240, or the first transmission member 410 and the driving member 240 are an integral structure, and the length direction of the first transmission member 410 is perpendicular to the rotation axis of the driving member 240, that is, the first transmission member 410 is rotatably installed on the valve body 210 through the driving member 240. The first transmission member 410 is connected to the valve core 230 through the driving member 240, so that the first transmission member 410 can drive the valve core 230 to move to open or block the sewage discharge channel 211.

[0047] Reference Figure 4 and Figure 5 As shown, it can be understood that the cover body 320 is slidably mounted on the cover body 310 along the front-to-back direction, and the cover body 320 can slide forward to open the through hole 311, and the cover body 320 can slide backward to close the through hole 311, which is convenient for operation. For example, the cover body 310 is provided with slide grooves arranged along the front-to-back direction and respectively located on the left and right sides of the through hole 311, and the left and right sides of the cover body 320 are respectively provided with protrusions, and the protrusions are slidably matched with the slide grooves, so as to realize the sliding match between the cover body 320 and the cover body 310.

[0048] Reference Figures 3 to 5As shown, it can be understood that the second transmission member 420 is installed on the upper side of the cover body 320, and the second transmission member 420 is in transmission cooperation with the first transmission member 410. Specifically, the first transmission member 410 is provided with a first slide groove 411, and the first slide groove 411 is arranged along the length direction of the first transmission member 410. The second transmission member 420 is fixedly installed on the upper side of the cover body 320, and the second transmission member 420 is provided with a connecting portion 421 protruding in the left and right direction, and the connecting portion 421 is accommodated in the first slide groove 411 and can slide along the first slide groove 411.

[0049] Therefore, when sewage needs to be discharged, the cover body 320 is pulled forward to open the cover body 320, and the second transmission member 420 moves forward with the cover body 320, and the second transmission member 420 pulls the first transmission member 410 forward, and drives the first transmission member 410 to rotate by cooperating with the connecting portion 421 and the first slide groove 411, and the first transmission member 410 further drives the member 240 and the valve core 230 to rotate, so that the valve core 230 opens the sewage discharge channel 211, and the stale water, scale, magnesium slag and other foreign matters in the water storage chamber 110 can be discharged through the sewage discharge channel 211 and the through hole 311, so as to clean the water storage chamber 110, which is easy to operate and convenient to use.

[0050] After cleaning is completed, the cover body 320 is pushed backwards, and the cover body 320 drives the first transmission member 410 to rotate in the opposite direction through the second transmission member 420. The first transmission member 410 further drives the driving member 240 and the valve core 230 to rotate in the opposite direction, so that the valve core 230 is reset and the sewage channel 211 is blocked to prevent water leakage.

[0051] Therefore, when sewage discharge is required or completed, only the cover body 320 needs to be operated, and there is no need to operate the sewage discharge valve 200, which is convenient to operate.

[0052] It is understandable that in order to avoid the problem that the drain valve 200 is opened in the initial stage of pulling out the cover 320, which causes the cover 320 to hinder the draining, the opening process of the drain valve 200 has a certain hysteresis. For example, the width of the first slide groove 411 is set wider and larger than the width of the connecting portion 421, so that in the initial stage of pulling out the cover 320, the second transmission member 420 does not drive the first transmission member 410 to rotate, until the drain valve 200 is completely exposed from the through hole 311, and the cover 320 is further pulled out, and the second transmission member 420 drives the first transmission member 410 and the valve core 230 to rotate, so as to open the drain valve 200.

[0053] In other embodiments, the driving member 240 can be slidably mounted on the valve body 210 along the front-to-back direction, and the first transmission member 410 and the valve core 230 are respectively fixedly connected to the driving member 240, that is, the first transmission member 410 is slidably mounted on the valve body 210 through the driving member 240. Therefore, the first transmission member 410 can drive the valve core 230 to slide along the front-to-back direction to extend into or move out of the sewage channel 211, so as to open or block the sewage channel 211. The cover body 320 is slidably mounted on the cover body 310 along the front-to-back direction, and the second transmission member 420 is fixedly connected to the first transmission member 410. Therefore, when the cover 320 is pulled forward, the cover 320 drives the first transmission member 410 to move forward through the second transmission member 420, and the first transmission member 410 further drives the valve core 230 to move forward to move out of the sewage channel 211, thereby opening the sewage channel 211; when the cover 320 is pushed back, the cover 320 drives the valve core 230 to move backward through the second transmission member 420 and the first transmission member 410, and the valve core 230 extends into the sewage channel 211 and blocks the sewage channel 211. In this way, the cover 320 and the sewage valve 200 can be linked, which is convenient for operation.

[0054] In other embodiments, the driving member 240 is rotatably mounted on the valve body 210, the cover body 320 is rotatably mounted on the cover body 310, and both ends of the second transmission member 420 are respectively hinged to the first transmission member 410 and the cover body 320. Therefore, when the cover body 320 is opened or closed, the valve core 230 can be driven to rotate by the second transmission member 420 and the first transmission member 410 to open or block the sewage channel 211, which is easy to operate.

[0055] Reference Figure 4 and Figure 5 As shown, it can be understood that the water heater also includes a controller and a sensor 430, the sensor 430 is installed on the cover 310 and is located at the rear end of the left or right side of the through hole 311, and the sensor 430 is configured as an induction switch and has contacts. When the cover 320 is in a closed state, the cover 320 abuts against the contacts of the sensor 430, and when the cover 320 is pulled out, the cover 320 leaves the contacts. In other words, the sensor 430 is used to detect the open state or closed state of the cover 320. The controller can be a control system of the water heater, and the controller includes a high-voltage power supply module and a low-voltage power supply module, wherein the high-voltage power supply module is electrically connected to the heating element 120 to realize power supply to the heating element 120, the low-voltage power supply module is electrically connected to the sensor 430 to realize power supply to the sensor 430, and the controller is connected to the sensor 430 signal to receive the electrical signal fed back by the sensor 430.

[0056] It can be understood that the controller is used to obtain the signal detected by the sensor 430 that the cover 320 is in the open state to control the high-voltage power supply module to disconnect. Specifically, when sewage discharge is required, when the cover 320 is pulled out to open the cover 320, the cover 320 leaves the contact of the sensor 430, and the sensor 430 feeds back the signal that the cover 320 is in the open state to the controller. The controller controls the high-voltage power supply module to cut off the power, thereby stopping the power supply to the heating element 120, reducing the risk of electric shock to maintenance personnel or users, and improving safety. Generally speaking, at this time, the low-voltage power supply module is normally conducting to ensure the normal operation of the sensor 430.

[0057] It is easily understood that when the cover 320 is closed, the cover 320 abuts against the contact of the sensor 430, and the sensor 430 feeds back the signal that the cover 320 is in the closed state to the controller. The controller controls the high-voltage power supply module to conduct, so as to re-power the heating element 120 to meet the heating function requirements of the water heater.

[0058] Refer to Figure 6 and Figure 7 As shown, it can be understood that in some other embodiments, the sewage discharge valve 200 is configured as an electric valve, such as a solenoid valve or an electric pneumatic valve, etc., and the linkage assembly 400 can also be an electric control linkage structure. Specifically, the linkage assembly 400 includes a controller and a sensor 430. Similarly, the sensor 430 is installed on the cover 310 and is located at the left or right rear end of the through hole 311. The sensor 430 is configured as a sensing switch and has a contact. When the cover 320 is in the closed state, the cover 320 abuts against the contact of the sensor 430, and when the cover 320 is pulled out, the cover 320 leaves the contact. That is to say, the sensor 430 can detect the open state or closed state of the cover 320.

[0059] Refer to Figure 6 and Figure 7 As shown, it can be understood that the controller can be the control system of the water heater. The controller includes a high-voltage power supply module and a low-voltage power supply module. Among them, the high-voltage power supply module is electrically connected to the heating element 120 to supply power to the heating element 120, and the low-voltage power supply module is electrically connected to the sensor 430 and the sewage discharge valve 200 to supply power to the sensor 430 and the sewage discharge valve 200. And the controller is also signal-connected to the sensor 430 and the sewage discharge valve 200, so as to control the on-off state of the sewage discharge valve 200 through the controller according to the electrical signal fed back by the sensor 430.

[0060] Refer to Figure 6 and Figure 7As shown, it can be understood that the controller is used to obtain the signal of the sensor 430 detecting that the cover 320 is in the open state to control the drain valve 200 to open. Specifically, when it is necessary to drain sewage, when the cover 320 is pulled out to open the cover 320, the cover 320 leaves the contact point of the sensor 430, and the sensor 430 feeds back the signal that the cover 320 is in the open state to the controller, and the controller controls the drain valve 200 to open, so that the stale water, scale, magnesium slag and other foreign matters in the water storage chamber 110 can be discharged through the drain valve 200 and the through hole 311, so as to clean the water storage chamber 110, and there is no need to manually open the drain valve 200, which is convenient to operate and easy to use.

[0061] After cleaning is completed, the cover 320 is pushed backward to close the cover 320, and the cover 320 contacts the contact point of the sensor 430. The sensor 430 feeds back a signal that the cover 320 is in a closed state to the controller, and the controller controls the drain valve 200 to close to avoid water leakage.

[0062] Reference Figure 6 and Figure 7 As shown, it can be understood that, similarly, the controller is used to obtain the signal that the sensor 430 detects that the cover 320 is in the open state to control the high-voltage power supply module to disconnect. Specifically, when sewage needs to be discharged, when the cover 320 is pulled out to open the cover 320, the cover 320 leaves the contact of the sensor 430, and the sensor 430 feeds back the signal that the cover 320 is in the open state to the controller, and the controller controls the high-voltage power supply module to cut off the power, thereby stopping the power supply to the heating element 120, reducing the risk of electric shock for maintenance personnel or users, and improving safety. Generally speaking, at this time, the low-voltage power supply module is normally turned on to ensure that the sensor 430 and the sewage valve 200 work normally.

[0063] It is easy to understand that when the cover 320 is closed, the cover 320 contacts the contact of the sensor 430, and the sensor 430 feeds back a signal that the cover 320 is in a closed state to the controller. The controller controls the high-voltage power supply module to turn on to re-power the heating element 120 to meet the heating function requirements of the water heater.

[0064] It is easy to understand that, similarly, in order to avoid the drawback that the drain valve 200 is opened in the initial stage of pulling out the cover body 320, which causes the cover body 320 to hinder the draining, the opening process of the drain valve 200 has a certain hysteresis. For example, the controller can be set to delay the control of the drain valve 200 to open. When it is necessary to drain sewage, when the cover body 320 is pulled out to open the cover body 320, the cover body 320 leaves the contact point of the sensor 430, and the sensor 430 feeds back the signal that the cover body 320 is in the open state to the controller. The controller does not immediately control the drain valve 200 to open, but controls the drain valve 200 to open after a delay of one second, two seconds or several seconds, so that the drain valve 200 is fully exposed from the through hole 311, and then the drain valve 200 is opened to achieve normal draining.

[0065] It is easy to understand that the linkage assembly 400 is an electrically controlled linkage structure, which uses electrical signals to control the opening and closing of the drain valve 200, and the control is sensitive. At the same time, there is no connection structure between the cover body 320 and the driving member 240 of the drain valve 200, which effectively reduces the resistance when opening the cover body 320, and the operation is smoother and more convenient.

[0066] Reference Figures 8 to 16 As shown, it can be understood that, in this embodiment, the outer wall of the valve core 230 of the sewage valve 200 includes an end face 231 and a side face 232 arranged around the end face 231. For example, the shape of the valve core 230 is a non-spherical shape such as a plate, a cylinder, a truncated cone, or a cone. The inner wall of the sewage channel 211 includes a sealing wall surface 2118, and the side face 232 of the valve core 230 is sealed with the sealing wall surface 2118.

[0067] It is easy to understand that in order to ensure the sealing effect between the valve core 230 and the valve body 210, it is necessary to ensure that the sealing surface between the valve core 230 and the valve body 210 has a high processing accuracy. By setting the valve core 230 to a non-spherical structure such as a plate, a cylinder, a truncated cone, or a cone, the valve core 230 is only sealed with the sealing wall 2118 of the sewage channel 211 through the side 232 to avoid water leakage. When processing the valve core 230, it is only necessary to ensure that the side 232 of the valve core 230 has a high processing accuracy, which effectively reduces the processing requirements for the valve core 230, thereby helping to reduce the processing cost.

[0068] Reference Figure 8 and Fig. 9As shown, it can be understood that the drain valve 200 is configured as a butterfly valve. Specifically, the drain valve 200 includes a valve body 210, a valve core 230 and a driving member 240, wherein the valve body 210 is provided with a drain channel 211 arranged in the up-down direction, and the drain channel 211 is connected to the water storage chamber 110. The cross section of the drain channel 211 is circular, and the valve core 230 is configured as a plate-like structure and a circular plate structure. The wall surfaces at both ends of the circular plate structure in the thickness direction are the end faces 231 of the valve core 230, and the peripheral wall of the circular plate structure is the side surface 232 of the valve core 230. The valve core 230 is located in the drain channel 211, and the driving member 240 is handle-shaped and rotatably mounted on the valve body 210, and the driving member 240 is fixedly connected to the valve core 230, so that the valve core 230 is rotatably mounted in the drain channel 211. The rotation axis of the valve core 230 is perpendicular to the thickness direction of the circular plate and passes through the center of the circular plate structure. In the drain channel 211, the rotation axis of the valve core 230 is arranged along the radial direction of the drain channel 211, specifically, along the left-right direction.

[0069] Therefore, the valve core 230 of the circular plate structure can be driven to rotate by the driving member 240 to change the angle between the thickness direction of the circular plate structure and the radial direction of the sewage channel 211, so as to open or block the sewage channel 211. When the thickness direction of the circular plate structure is perpendicular to the radial direction of the sewage channel 211, the circumferential wall of the circular plate structure (i.e., the side surface 232 of the valve core 230) contacts and seals with the inner circumferential wall of the sewage channel 211, and the inner circumferential wall of the sewage channel 211 that contacts the circumferential wall of the circular plate structure is the sealing wall surface 2118 of the sewage channel 211. In this way, the valve core 230 blocks the sewage channel 211, that is, the sewage valve 200 is closed. The circular plate structure is driven to rotate by the driving member 240, and when the angle between the thickness direction of the circular plate structure and the radial direction of the sewage channel 211 becomes an acute angle, the circumferential wall of the circular plate structure is separated from the sealing wall surface 2118 of the sewage channel 211, so as to open the sewage channel 211, that is, the sewage valve 200 is opened. The valve core 230 of the circular plate structure is sealed with the sealing wall 2118 of the sewage channel 211 only through the peripheral wall. When processing the valve core 230, only the processing accuracy of the peripheral wall needs to be ensured, which is conducive to reducing the processing difficulty of the valve core 230 and thus reducing the processing cost.

[0070] Reference Figures 10 to 12As shown, it can be understood that in other embodiments, the drain valve 200 is configured as a plug valve. Specifically, the drain channel 211 includes a main channel 2111 and a mounting channel 2112, the main channel 2111 is arranged in the up-down direction, the mounting channel 2112 is arranged along the radial direction of the main channel 2111, and the mounting channel 2112 extends along the radial direction of the main channel 2111 to both sides of the main channel 2111, and the mounting channel 2112 is connected to the main channel 2111. Generally speaking, the cross-sections of the main channel 2111 and the mounting channel 2112 are both circular. The peripheral wall of the mounting channel 2112 is the sealing wall 2118 of the drain channel 211.

[0071] Reference Figures 10 to 12 As shown, it can be understood that the valve core 230 is configured as a cylindrical structure, the wall surfaces at both ends of the cylindrical structure along the direction of the central axis are the end faces 231 of the valve core 230, and the peripheral wall of the cylindrical structure is the side face 232 of the valve core 230. The valve core 230 is rotatably installed in the installation channel 2112, the rotation axis of the valve core 230 coincides with the central axis of the cylindrical structure, and the rotation axis of the valve core 230 is arranged along the radial direction of the main channel 2111, specifically, the rotation axis of the valve core 230 is arranged along the left and right direction. The valve core 230 is provided with a first flow hole 233, and the two ends of the first flow hole 233 penetrate the side face 232 of the valve core 230 along the radial direction of the cylindrical structure. Rotating the valve core 230 can change the arrangement direction of the first flow hole 233 relative to the main channel 2111.

[0072] Reference Figures 10 to 12As shown, it can be understood that the driving member 240 is rotatably mounted on the valve body 210 and fixedly connected to the valve core 230. Therefore, the driving member 240 can drive the cylindrical valve core 230 to rotate, so as to change the arrangement direction of the first flow hole 233 relative to the main channel 2111, so as to open or block the main channel 2111. When the arrangement direction of the first flow hole 233 is arranged in the up-down direction, that is, the arrangement direction of the first flow hole 233 is the same as that of the main channel 2111, or the angle between the arrangement direction of the first flow hole 233 and that of the main channel 2111 is small, the first flow hole 233 makes the main channel 2111 conductive, that is, the sewage valve 200 is opened. The valve core 230 is driven to rotate by the driving member 240. When the angle between the arrangement direction of the first flow hole 233 and the arrangement direction of the main channel 2111 is large, for example, the arrangement direction of the first flow hole 233 is perpendicular to the arrangement direction of the main channel 2111, and the side 232 of the valve core 230 closes the main channel 2111, the side 232 of the valve core 230 is sealed with the inner peripheral wall of the installation channel 2112 (i.e., the sealing wall 2118 of the sewage channel 211), that is, the main channel 2111 is blocked, and the sewage valve 200 is closed. The valve core 230 of the cylindrical structure is sealed with the sealing wall 2118 of the sewage channel 211 only through the outer peripheral wall. When processing the valve core 230, only the processing accuracy of the outer peripheral wall needs to be guaranteed, which is conducive to reducing the processing difficulty of the valve core 230, thereby reducing the processing cost.

[0073] Reference Fig.13 and Fig.14 As shown, it can be understood that in other embodiments, the sewage valve 200 is configured as a gate valve. Specifically, the sewage channel 211 is arranged in the up-down direction, and the valve body 210 is further provided with a second slide groove 2114, which is located on one radial side of the sewage channel 211 and extends along the radial direction of the sewage channel 211, and the second slide groove 2114 is connected to the sewage channel 211.

[0074] Reference Fig.13 and Fig.14 As shown, it can be understood that the valve core 230 is configured as a plate structure, the wall surfaces at both ends of the plate structure in the thickness direction are the end surfaces 231 of the valve core 230, and the side walls of the plate structure are the side surfaces 232 of the valve core 230. The valve core 230 is slidably installed in the second slide groove 2114 along the radial direction of the sewage channel 211, and the valve core 230 of the plate structure is perpendicular to the arrangement direction of the sewage channel 211.

[0075] Reference Fig.13 and Fig.14As shown, it can be understood that the driving member 240 is threadedly connected to the valve body 210, that is, the driving member 240 is rotationally matched with the valve body 210, and the end of the driving member 240 extends into the second slide groove 2114 and rotates with the valve core 230, and the rotation axis of the driving member 240 is arranged along the sliding direction of the valve core 230. Therefore, by rotating the driving member 240, the valve core 230 can be driven to move along the second slide groove 2114, so that the valve core 230 extends into the sewage channel 211 and contacts the inner wall of the sewage channel 211 or the valve core 230 is separated from the inner wall of the sewage channel 211, thereby realizing opening or blocking the sewage channel 211. When the valve core 230 extends into the drain channel 211, and the side surface 232 of the valve core 230 contacts the inner peripheral wall of the drain channel 211, the side surface 232 of the valve core 230 and the inner peripheral wall of the drain channel 211 are sealed and matched, and the inner peripheral wall of the drain channel 211 that contacts the side surface 232 of the valve core 230 is the sealing wall surface 2118 of the drain channel 211. At this time, the two end surfaces 231 of the valve core 230 are respectively sealed and matched with the inner wall of the second slide groove 2114, so that the valve core 230 blocks the drain channel 211, and the drain valve 200 is closed. The driving member 240 is rotated in the reverse direction, and the driving member 240 drives the valve core 230 to separate from the sealing wall surface 2118 of the drain channel 211, the drain channel 211 is connected, and the drain valve 200 is opened. The valve core 230 of the plate structure is sealed with the sealing wall 2118 of the sewage channel 211 only through the side wall. When processing the valve core 230, only the processing accuracy of the side wall needs to be ensured, which is conducive to reducing the processing difficulty of the valve core 230 and thus reducing the processing cost.

[0076] Reference Fig.13 and Fig.14 As shown, it can be understood that the inner circumferential wall of the sewage channel 211 is provided with a groove 2113, which is arranged along the circumference of the sewage channel 211 and opens toward the center of the sewage channel 211, and the groove 2113 is connected with the second slide groove 2114. When the sewage valve 200 is closed, the valve core 230 is accommodated in the groove 2113, and the side 232 of the valve core 230 abuts against the bottom wall of the groove 2113 and seals, and the bottom wall of the groove 2113 is the sealing wall surface 2118 of the sewage channel 211. And the end face 231 of the valve core 230 abuts against the groove walls on both sides of the groove 2113. In this way, the sealing area between the valve core 230 and the sewage channel 211 can be increased, and the sealing effect can be improved.

[0077] It is understandable that in other embodiments, the driving member 240 is slidably mounted on the valve body 210 along the radial direction of the sewage channel 211, and the sliding direction of the driving member 240 is the same as the sliding direction of the valve core 230 of the plate structure. Therefore, by moving the driving member 240, the valve core 230 can be driven to move along the second slide groove 2114, so that the valve core 230 extends into the sewage channel 211 and contacts the inner wall of the sewage channel 211, or the valve core 230 is separated from the inner wall of the sewage channel 211, thereby realizing opening or blocking the sewage channel 211.

[0078] Reference Fig.15 and Fig.16 As shown, it can be understood that in other embodiments, the sewage valve 200 is configured as a stop valve. Specifically, the valve body 210 includes a partition 220 disposed in the sewage channel 211, the partition 220 is arranged in the up-down direction and divides the sewage channel 211 into a first channel 2115 and a second channel 2116, and the lower part of the first channel 2115 and the upper part of the second channel 2116 are arranged in the left-right direction. The sewage channel 211 also includes a second flow hole 311, which is provided on the partition 220 and connects the lower part of the first channel 2115 with the upper part of the second channel 2116.

[0079] Reference Fig.15 and Fig.16 As shown, it can be understood that the valve body 210 is also provided with a third slide groove 2119, the third slide groove 2119 is located on the radial side of the sewage channel 211 and extends radially along the sewage channel 211, the third slide groove 2119 and the partition 220 are arranged correspondingly in the radial direction of the sewage channel 211, the third slide groove 2119 is connected to the upper part of the second channel 2116, or the third slide groove 2119 is connected to the lower part of the first channel 2115.

[0080] Reference Fig.15 and Fig.16As shown, it can be understood that the valve core 230 is installed in the third slide groove 2119 along the radial direction of the sewage channel 211, and the driving member 240 is threadedly connected with the valve body 210, that is, the driving member 240 and the valve body 210 are rotationally matched, and the rotation axis of the driving member 240 is arranged along the sliding direction of the valve core 230. One end of the driving member 240 extending into the third slide groove 2119 is fixedly connected to the valve core 230. Therefore, the driving member 240 can be rotated to drive the valve core 230 to move along the third slide groove 2119 to achieve blocking or opening the second flow hole 2117, thereby making the sewage channel 211 conductive or blocking the sewage channel 211. When the driving member 240 is rotated to drive the valve core 230 to move toward the second flow hole 2117 and block the second flow hole 2117, the first channel 2115 and the second channel 2116 are blocked, the sewage channel 211 is blocked, and the sewage valve 200 is closed. The driving member 240 is rotated in the reverse direction to move the valve core 230 away from the second flow hole 2117 , so that the first channel 2115 is connected with the second channel 2116 , the sewage channel 211 is connected, and the sewage valve 200 is opened.

[0081] It is understandable that, in other embodiments, the driving member 240 is slidably mounted on the valve body 210 along the radial direction of the sewage channel 211, and the sliding direction of the driving member 240 is the same as the sliding direction of the valve core 230. Therefore, by moving the driving member 240, the valve core 230 can be driven to move along the third slide groove 2119, so that the valve core 230 moves toward the second flow hole 2117 and blocks the second flow hole 2117, or the valve core 230 moves away from the second flow hole 2117, thereby realizing opening or blocking the sewage channel 211.

[0082] Reference Fig.15 and Fig.16 As shown, it can be understood that the valve core 230 is configured as a truncated cone structure or a conical structure, and the side 232 of the valve core 230 is a conical surface. The small end of the valve core 230 is closer to the second flow hole 2117 than the large end. The inner peripheral wall of the second flow hole 2117 is the sealing wall surface 2118 of the sewage discharge channel 211, and the inner peripheral wall of the second flow hole 2117 matches the side 232 of the valve core 230. Therefore, when the sewage valve 200 is closed, the side 232 of the valve core 230 contacts the inner peripheral wall of the second flow hole 2117 and seals. Since the side 232 of the valve core 230 is a conical surface, as the valve core 230 approaches the second flow hole 2117, the force between the side 232 of the valve core 230 and the inner peripheral wall of the second flow hole 2117 can be continuously increased, thereby improving the sealing effect.

[0083] It is understandable that in other embodiments, the valve body 210 is rotationally matched with the driving member 240. Therefore, when the valve core 230 contacts the inner peripheral wall of the second flow hole 2117, the valve core 230 is prevented from rotating relative to the partition plate 220, the friction between the valve core 230 and the inner peripheral wall of the second flow hole 2117 is reduced, the wear of the valve core 230 is reduced, and the service life of the valve core 230 is extended.

[0084] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A water heater, characterized in that: include: The body is provided with a water storage cavity and a sewage outlet connected to the water storage cavity; A sewage valve, installed on the machine body and connected to the sewage outlet; A cover body, movably mounted on the body and used to cover the drain valve, when the cover body is in an open state, the drain valve is exposed; The linkage assembly is configured to drive the drain valve to open when the cover is in the open state.

2. The water heater according to claim 1, characterized in that: The sewage valve includes a valve body and a valve core, the valve body is provided with a sewage channel, the valve core is arranged in the sewage channel, the linkage assembly includes a first transmission member and a second transmission member, the first transmission member is connected to the valve core and is used to drive the valve core to open or block the sewage channel, the second transmission member is installed on the cover body and cooperates with the first transmission member in transmission, and the cover body is configured to drive the valve core to open the sewage channel when it is opened.

3. The water heater according to claim 2, characterized in that: The body includes a cover body, which is arranged on the drain valve. The cover body is provided with a through hole, and the through hole is configured to expose the drain valve outside the cover body. The cover body is movably connected to the cover body and is used to cover the through hole.

4. The water heater according to claim 3, characterized in that: The first transmission member is rotatably mounted on the valve body, the cover body is slidably mounted on the cover body, and the second transmission member is configured to slide along with the cover body to drive the first transmission member to rotate.

5. The water heater according to claim 4, characterized in that: One of the first transmission member and the second transmission member is provided with a first slide groove, and the other is provided with a connecting portion accommodated in the first slide groove, and the connecting portion is configured to slideably cooperate with the first slide groove along the length direction of the first slide groove.

6. The water heater according to claim 1, characterized in that: The water heater also includes a controller and a sensor, wherein the sensor is used to detect the open state or closed state of the cover body, and the controller is connected to the sensor signal. The controller includes a high-voltage power supply module and a low-voltage power supply module, wherein the high-voltage power supply module is electrically connected to the heating element of the water heater, and the low-voltage power supply module is electrically connected to the sensor, and the controller is used to obtain a signal from the sensor detecting that the cover body is in an open state to control the high-voltage power supply module to disconnect.

7. The water heater according to claim 1, characterized in that: The drain valve is configured as an electric valve, and the linkage component includes a controller and a sensor. The controller is connected to the drain valve and the sensor signal. The sensor is used to detect the open state or closed state of the cover body. The controller is used to obtain the signal from the sensor detecting that the cover body is in the open state to control the opening of the drain valve.

8. The water heater according to claim 6, characterized in that: The controller includes a high-voltage power supply module and a low-voltage power supply module. The high-voltage power supply module is electrically connected to the heating element of the water heater, and the low-voltage power supply module is electrically connected to the drain valve and the sensor. The controller is used to obtain the signal from the sensor detecting that the cover is in an open state to control the high-voltage power supply module to disconnect.

9. The water heater according to claim 1, characterized in that: The sewage valve includes a valve body, a valve core and a driving member. The valve body is provided with a sewage channel. The valve core is arranged in the sewage channel. The driving member is installed on the valve body and connected to the valve core. The driving member is used to drive the valve core to open or block the sewage channel. The inner wall of the sewage channel includes a sealing wall surface. The outer wall of the valve core includes an end surface and a side surface arranged around the end surface. The side surface is sealed with the sealing wall surface.

10. The water heater according to claim 9, characterized in that: The valve core is slidably mounted on the valve body along the radial direction of the sewage discharge passage; or, the valve core is rotatably mounted on the valve body, and the rotation axis of the valve core is arranged along the radial direction of the sewage discharge passage.

11. The water heater according to claim 9, characterized in that: The valve core is configured as a plate-shaped structure or a columnar structure.

12. The water heater according to claim 9, characterized in that: The valve core is configured as a plate-like structure and is rotatably installed in the sewage channel. The rotation axis of the plate-like structure is perpendicular to the thickness direction of the plate-like structure, and the rotation axis of the plate-like structure is arranged along the radial direction of the sewage channel. The side surface of the plate-like structure is configured to contact with the inner wall of the sewage channel for sealing.

13. The water heater according to claim 9, characterized in that: The valve core is configured as a cylindrical structure, the sewage channel includes a main channel and an installation channel, the installation channel is arranged along the radial direction of the main channel and is connected to the main channel, the cylindrical structure is rotatably installed on the installation channel, the rotation axis of the cylindrical structure coincides with the central axis of the cylindrical structure and is arranged along the radial direction of the main channel, the outer circumferential wall of the cylindrical structure is configured to be in contact with the inner circumferential wall of the installation channel for sealing cooperation, the cylindrical structure is provided with a first flow hole, both ends of the first flow hole pass through the outer circumferential wall of the cylindrical structure along the radial direction of the cylindrical structure, and the first flow hole is configured to make the main channel conductive when the sewage valve is opened.

14. The water heater according to claim 9, characterized in that: The valve body is provided with a second slide groove, which is located on a radial side of the sewage channel and is connected to the sewage channel. The valve core is slidably installed in the second slide groove so that the side surface of the valve core contacts or moves away from the inner wall of the sewage channel, and the end face of the valve core is sealed with the inner wall of the second slide groove.

15. The water heater according to claim 14, characterized in that: The inner wall of the sewage discharge channel is provided with a groove, the valve core is accommodated in the groove, and the side surface of the valve core contacts with the groove wall of the groove to form a sealing fit.

16. The water heater according to claim 14, characterized in that: The driving member is threadedly connected to the valve body, an end of the driving member is rotationally matched with the valve core, and a rotation axis of the driving member is arranged along a sliding direction of the valve core.

17. The water heater according to claim 9, characterized in that: The valve body includes a partition located in the sewage channel, the partition divides the sewage channel into a first channel and a second channel, the sewage channel also includes a second flow hole arranged on the partition, the second flow hole connects the first channel and the second channel, the valve body is provided with a third slide groove, the third slide groove is located on one radial side of the sewage channel and is connected to the first channel or the second channel, and the valve core is slidably installed in the third slide groove to block or open the second flow hole.

18. The water heater according to claim 17, characterized in that: The side wall of the valve core is configured as a conical surface and contacts with the inner wall of the second flow hole to form a sealing fit, and the small end of the conical surface is closer to the second flow hole than the large end.

19. The water heater according to claim 17, characterized in that: The driving member is threadedly connected to the valve body, and the rotation axis of the driving member is arranged along the sliding direction of the valve core. The driving member is fixedly connected or rotationally matched with the valve body.

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