Water heater

Abstract

The invention discloses a water heater, and relates to the technical field of water heaters. The water heater comprises a machine body and a blow-down valve, an inner container of the machine body is located in a shell, the machine body is provided with a blow-down connector communicated with the inner container, a valve body of the blow-down valve is connected with the blow-down connector in a sealed mode, a valve element is located in a blow-down channel of the valve body, and a driving piece can drive the valve element to move so that the valve element can be switched between the sealing state and the drainage state. When sewage needs to be discharged, the valve element is driven by the driving piece to be switched to the drainage state, the sewage discharging channel is opened, and water is discharged through the sewage discharging connector and the sewage discharging channel. When drainage is not needed, the valve element is driven by the driving piece to be switched to the sealing state so as to seal the drainage channel. As at least one of the first matching surface of the valve core and the second matching surface of the sewage discharge channel is provided with the sealing layer, the valve core can be in sealing fit with the sewage discharge channel through the sealing layer, so that the requirement on the manufacturing precision of the valve core and the sewage discharge channel is not high, effective sealing can be realized, and the production cost is low.

Description

Technical Field

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

[0002] Since the inner tank of the water heater is made of iron material, it is easy to form a galvanic cell with impurities in the water and be corroded as an anode. In order to protect the inner tank, a magnesium rod is usually set in the inner tank. Magnesium is more active than iron and can be corroded before iron. The magnesium slag after the reaction of the magnesium rod will be deposited at the bottom of the inner tank, and the original impurities in the water will also be deposited at the bottom of the inner tank to form scale. Therefore, it is necessary to set a drain joint at the bottom of the inner tank, and the drain joint is connected to the drain valve. When it is necessary to drain sewage, open the drain valve, and the sewage can be discharged along the drain joint. The drain valve in the related technology is usually a ball valve, which has high processing accuracy requirements and high cost. When the processing accuracy is insufficient, it is easy to cause water leakage, and the user experience is poor. 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, the drain valve of which has a good sealing effect, has low manufacturing precision requirements and is low in cost.

[0004] According to an embodiment of the present invention, the water heater comprises: a body, comprising an outer shell and an inner tank, the inner tank is arranged inside the outer shell, the body is provided with a drain joint, the inner cavity of the drain joint is connected to the inner cavity of the inner tank; a drain valve, comprising a valve body, a valve core and a driving member, the valve body is sealed and connected to the drain joint, the valve body is provided with a drain channel, one end of the drain channel is connected to the inner cavity of the drain joint, and the other end of the drain channel passes through the outer wall surface of the valve body, the valve core is arranged in the drain channel, the driving member is inserted in the valve body and is used to drive the valve core to move or rotate; wherein, the valve core has a first mating surface, the drain channel has a second mating surface, at least one of the first mating surface or the second mating surface is provided with a sealing layer, the valve core has a sealing state and a drainage state, when the valve core is in the sealing state, the first mating surface is sealed and matched with the sealing layer and the second mating surface to seal the drain channel, when the valve core is in the drainage state, the valve core opens the drain channel.

[0005] The water heater according to the embodiment of the present invention has at least the following beneficial effects: The inner tank of the fuselage is arranged inside the outer shell, and the fuselage is provided with a sewage connection joint connected to the inner tank, the valve body of the sewage valve is sealed and connected to the sewage connection joint, the valve core is located in the sewage channel of the valve body, and the driving member can drive the valve core to move, so that the valve core switches between the sealing state and the drainage state. When sewage needs to be discharged, the valve core is driven to switch to the drainage state by the driving member, and the sewage channel is connected, so that the water inside the inner tank is discharged through the sewage connection joint and the sewage channel, which can promote the cleaning of the sediment in the inner tank and prevent the sediment from affecting the bathing water flow or damaging the water heater. When drainage is not required, the valve core is driven to switch to the sealing state by the driving member to seal the sewage channel. Since at least one of the first mating surface of the valve core or the second mating surface of the sewage channel is provided with a sealing layer, the valve core can be sealed and matched with the sewage channel through the sealing layer, so the manufacturing precision requirements of the valve core and the sewage channel are not high, and effective sealing can be achieved, the user experience is good, and the production cost is low.

[0006] According to some embodiments of the present invention, the sealing layer is made of one of plastic, rubber or silicone.

[0007] According to some embodiments of the present invention, the sewage channel includes a first sewage section, an installation section and a second sewage section, the first sewage section is connected to the inner cavity of the sewage joint, the second sewage section and the first sewage section are arranged at intervals and pass through the end surface of the valve body, the installation section is located between the first sewage section and the second sewage section, the valve core is installed on the installation section, the end surface of the valve core facing the first sewage section is the first mating surface, and the side of the installation section facing the first mating surface is the second mating surface, the valve core is provided with a flow hole, and when the valve core is in the drainage state, the two ends of the flow hole are connected to the first sewage section and the second sewage section.

[0008] According to some embodiments of the present invention, the driving member is connected to the valve core, and the driving member is configured to be able to drive the valve core to translate so that the valve core switches between the sealing state and the drainage state.

[0009] According to some embodiments of the present invention, the driving member is fixedly connected to the valve core, and the driving member is configured to drive the valve core to rotate in the installation section so that the valve core switches between the sealing state and the drainage state.

[0010] According to some embodiments of the present invention, the sewage channel is extended in the up-down direction, the sewage channel includes a sealing section, the cross-sectional area of ​​the sealing section gradually decreases in the up-down direction, the inner wall of the sealing section is the second mating surface, the valve body is provided with a connecting portion located at the lower end of the sewage channel, the driving member is connected to the connecting portion and inserted in the sewage channel, and the driving member is configured to be able to drive the valve core to move in the down-to-up direction to open the sewage channel.

[0011] According to some embodiments of the present invention, the driving member is threadedly connected to the connecting portion.

[0012] According to some embodiments of the present invention, the connecting portion includes a connecting block and a plurality of legs, the connecting block and the lower end of the sewage channel are spaced apart, the plurality of legs are spaced apart along the circumference of the connecting block and both ends are connected to the end of the valve body and the connecting block, a drain outlet is formed between adjacent legs, and the connecting block is provided with a first threaded hole connected to the driving member.

[0013] According to some embodiments of the present invention, the valve core is spherical; or, the valve core includes a truncated cone portion, and the side wall of the truncated cone portion is configured to be able to seal and cooperate with the inner wall of the sealing section.

[0014] According to some embodiments of the present invention, the sewage discharge channel is extended in the up-down direction, and the sewage discharge channel includes a third sewage discharge section and a fourth sewage discharge section that are connected to each other. The fourth sewage discharge section is located at the lower end of the third sewage discharge section, and the inner diameter of the third sewage discharge section is larger than the inner diameter of the fourth sewage discharge section. The second mating surface is formed between the third sewage discharge section and the fourth sewage discharge section, and the first mating surface is provided on the side of the valve core facing the second mating surface, and the first mating surface can be sealed and matched with the second mating surface.

[0015] According to some embodiments of the present invention, when the valve core is in the sealing state, the driving member is separated from the valve core, and when the valve core is in the drainage state, the driving member abuts against and lifts the valve core.

[0016] According to some embodiments of the present invention, a sealing ring is provided between the valve body and the end of the sewage discharge joint, and the sealing ring is arranged around the inlet end of the sewage discharge channel.

[0017] 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

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1is a structural cross-sectional view of a water heater according to an embodiment of the present invention; Figure 2 is a top view of a sewage valve according to a first embodiment of the present invention; Figure 3 is a cross-sectional view of a sewage valve in a sealed state according to a first embodiment of the present invention; Figure 4 is a cross-sectional view of a sewage valve according to a first embodiment of the present invention in a drainage state; Figure 5 is a cross-sectional view of a valve core according to an embodiment of the present invention; Figure 6 is a top view of a sewage valve in a sealed state according to a second embodiment of the present invention; Figure 7 is a top view of a sewage valve in an open state according to a second embodiment of the present invention; Figure 8 is a cross-sectional view of a sewage valve in an open state according to a second embodiment of the present invention; Fig. 9 is a schematic structural diagram of a sewage discharge valve according to a third embodiment of the present invention; Fig.10 is a cross-sectional view of a sewage valve in a sealed state according to a third embodiment of the present invention; Fig.11 is a cross-sectional view of a sewage valve in an open state according to a third embodiment of the present invention; Fig.12 is a cross-sectional view of a sewage valve in a sealed state according to a fourth embodiment of the present invention; Fig.13 is a cross-sectional view of a sewage valve in an open state according to a fourth embodiment of the present invention; Fig.14 is a cross-sectional view of a sewage valve in a fifth embodiment of the present invention in a sealed state; Fig.15 It is a cross-sectional view of a sewage valve in an open state according to a fifth embodiment of the present invention.

[0019] Reference numerals: Body 100; liner 110; water storage chamber 111; outer shell 120; water inlet connector 130; water inlet pipe 131; water outlet connector 140; water outlet pipe 141; sewage connector 150; Drain valve 200; valve body 210; sealing ring 211; second threaded hole 212; valve core 220; sealing layer 221; flow hole 222; first matching surface 223; frustum portion 224; driving member 230; connecting rod 231; actuating portion 232; drain channel 240; first drain section 241; second drain section 242; mounting section 243; sealing section 244; third drain section 245; fourth drain section 246; second matching surface 247; connecting portion 250; connecting block 251; supporting leg 252; drain outlet 253; first threaded hole 254. DETAILED DESCRIPTION

[0020] 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.

[0021] In the description of the present invention, it is necessary to understand that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the 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 cannot be understood as a limitation on the present invention.

[0022] 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.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. 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.

[0024] Reference Figure 1As shown, a water heater according to an embodiment of the present invention may be an electric water heater, a solar water heater, an air energy water heater, etc. The water heater comprises a body 100, the body 100 comprises an inner tank 110 and an outer shell 120, the inner tank 110 is arranged inside the outer shell 120 and forms a water storage chamber 111. The outer shell 120 plays a role in protecting the inner tank 110 and improving the safety of the inner tank 110. An insulation layer is arranged between the outer shell 120 and the inner tank 110, and the insulation layer is usually made of a foam material, and the foam material is polyurethane, which has good thermal insulation performance, can effectively reduce heat loss, and is safe and reliable, and has a long service life. The body 100 is provided with a water inlet joint 130 and a water outlet joint 140. For example, the water inlet joint 130 is connected to the lower end of the inner tank 110. The water inlet joint 130 is connected to a water inlet pipe 131, and the water inlet pipe 131 is arranged inside the inner tank 110 and extends in the up and down directions. The water outlet joint 140 is connected to the lower end of the inner tank 110, and the water outlet joint 140 is connected to a water outlet pipe 141, which is also located inside the inner tank 110 and extends in the up-down direction. Therefore, the water inlet pipe 131 of the water inlet pipe 131 and the water outlet pipe 141 of the water outlet pipe 141 are both far away from the bottom of the inner tank 110, effectively reducing the sediment at the bottom of the inner tank 110 from entering the water outlet pipe 141 and the water inlet pipe 131, so as to reduce adverse effects such as blockage and deterioration of water quality.

[0025] The inner liner 110 is usually made of iron material, which is easy to form a primary battery with impurities in the water and be corroded as an anode. Therefore, a magnesium rod is usually set in the inner liner 110. Magnesium is more active than iron and can be corroded before iron. The magnesium slag after the reaction of the magnesium rod will be deposited at the bottom of the inner liner 110, and the original impurities in the water will also be deposited at the bottom of the inner liner 110 to form scale. Therefore, it is necessary to set a sewage connector 150 at the bottom of the inner liner 110, and the inner cavity of the sewage connector 150 is connected to the water storage chamber 111 of the inner liner 110. The sewage connector 150 is connected to the sewage valve 200. When sewage needs to be discharged, the sewage valve 200 is opened, and the sewage can be discharged along the sewage connector 150.

[0026] In order to reduce the manufacturing cost of the drain valve 200 and improve its sealing performance, refer to Figure 1 , Figure 2 and Figure 3 As shown, a water heater according to an embodiment of the present invention further includes a drain valve 200, which includes a valve body 210, a valve core 220 and a driving member 230. The valve body 210 is sealed and connected to the drain connector 150, so as to prevent water from leaking out from between the valve body 210 and the drain connector 150. The valve body 210 is provided with a drain channel 240, one end of which is connected to the inner cavity of the drain connector 150, and the other end of the drain channel 240 passes through the outer wall of the valve body 210. The valve core 220 is provided in the drain channel 240, and the driving member 230 is inserted into the valve body 210 and is used to drive the valve core 220 to move or rotate. Figure 3 and Figure 5As shown, the valve core 220 has a first mating surface 223, and the sewage channel 240 has a second mating surface 247. At least one of the first mating surface 223 or the second mating surface 247 is provided with a sealing layer 221. For example, only the first mating surface 223 is provided with a sealing layer 221, or only the second mating surface 247 is provided with a second sealing layer 221, or both the first mating surface 223 and the second mating surface 247 are provided with a sealing layer 221. The valve core 220 is made of a metal inner core and a sealing layer. The metal inner core is made of a metal material with a high density and not easy to corrode and rust, such as stainless steel. The sealing layer 221 can be made of plastic, rubber or silicone material. The plastic can be polytetrafluoroethylene. Polytetrafluoroethylene has an extremely low friction coefficient, which can reduce wear when the valve core 220 contacts the valve seat and improve the smoothness of the valve core 220 when it moves or rotates. Polytetrafluoroethylene reduces the opening and closing torque through its own lubricating properties, and can also produce a certain degree of elastic deformation under pressure to ensure that the sealing surface fits tightly. When rubber or silicone is used, because rubber and silicone materials have a certain elastic deformation, they can also ensure the close fit of the sealing surface.

[0027] The valve core 220 has a sealing state and a drainage state, and the state of the valve core 220 can be switched by the driving member 230. When the valve core 220 is in the sealing state, for example Figure 3 As shown, the first mating surface 223 and the second mating surface 247 are sealed and matched through the sealing layer 221, thereby sealing the sewage channel 240 to prevent the water in the sewage connector 150 from being discharged. When the valve core 220 is in the drainage state, for example Figure 4 As shown, the valve core 220 opens the drain passage 240 , so that the water in the drain connector 150 is discharged through the drain passage 240 .

[0028] By adopting the above scheme, when it is necessary to drain sewage, the valve core 220 is driven by the driving member 230 to switch to the drainage state, and the sewage channel 240 is connected, so that the water inside the inner tank 110 is discharged through the sewage connector 150 and the sewage channel 240, which can promote the cleaning of the sediment in the inner tank 110 and prevent the sediment from affecting the bathing water flow or damaging the water heater. When it is not necessary to drain, the valve core 220 is driven by the driving member 230 to switch to the sealing state to seal the sewage channel 240. Since at least one of the first mating surface 223 of the valve core 220 or the second mating surface 247 of the sewage channel 240 is provided with a sealing layer 221, the valve core 220 can be sealed and matched with the sewage channel 240 through the sealing layer 221, so the manufacturing precision requirements of the valve core 220 and the sewage channel 240 are not high, and effective sealing can be achieved, the user experience is good, and the production cost is low.

[0029] Reference Figure 2 and Figure 3 As shown, Figure 2The dotted line in the figure represents the structure of the blocked valve core 220. In the first embodiment of the present invention, the sewage channel 240 includes a first sewage section 241, a mounting section 243 and a second sewage section 242. One end of the first sewage section 241 is connected to the inner cavity of the sewage connector 150. The second sewage section 242 and the first sewage section 241 are arranged at intervals and pass through the end surface of the valve body 210. The mounting section 243 is located between the first sewage section 241 and the second sewage section 242. For example, the first sewage section 241, the mounting section 243 and the second sewage section 242 are arranged in sequence from top to bottom. The valve core 220 is installed in the mounting section 243, and the end surface of the valve core 220 facing the first sewage section 241 is the first matching surface 223, and the side of the mounting section 243 facing the first matching surface 223 is the second matching surface 247. The valve core 220 is provided with a flow hole 222, and the flow hole 222 passes through the upper and lower end surfaces of the valve core 220. When the valve core 220 is in a sealed state, refer to Figure 3 As shown, the first mating surface 223 is sealed with the sealing layer 221 and the first mating surface 223, and the first mating surface 223 seals the lower end of the first sewage discharge section 241. When the valve core 220 is in the drainage state, refer to Figure 4 As shown, the two ends of the flow hole 222 are connected to the first sewage section 241 and the second sewage section 242 respectively, so that the water flows through the first sewage section 241, the flow hole 222 and the second sewage section 242 in sequence, and finally discharges the sewage valve 200. By providing the flow hole 222 on the valve core 220, it is beneficial for the water to be discharged through the flow hole 222. When the aperture of the flow hole 222 is the same as that of the first sewage section 241 and the second sewage section 242, the drainage efficiency can be improved.

[0030] Reference Figure 2As shown, in the first embodiment of the present invention, the valve core 220 is square or horizontally cylindrical, and the shape of the mounting section 243 is adapted to the shape of the valve core 220. The driving member 230 is connected to the valve core 220, and the driving member 230 is configured to drive the valve core 220 to translate, so that the valve core 220 switches between the sealing state and the drainage state. It should be noted that the driving member 230 is connected to the valve core 220, and the driving member 230 and the valve core 220 can be fixedly connected, or the driving member 230 and the valve core 220 are rotatably connected. For example, when the driving member 230 and the valve core 220 are fixedly connected, the driving member 230 is inserted into the side wall of the valve body 210 and is slidably connected to the valve body 210, and the driving member 230 is pulled or pushed along the axial direction of the driving member 230, which can drive the valve core 220 to translate in the mounting section 243 to switch the working state of the valve core 220, and the working state includes the drainage state and the sealing state. By adopting the scheme of directly pulling or pushing the driving member 230, the sewage valve 200 can be quickly switched on and off, and the operation is convenient. When the driving member 230 and the valve core 220 are rotatably connected, the driving member 230 is threadedly connected to the valve body 210, and the relative position of the driving member 230 and the valve body 210 is changed by forward or reverse rotation, thereby driving the valve core 220 to translate to switch the working state of the valve core 220. The scheme of threaded connection between the driving member 230 and the valve body 210 can ensure the stability and reliability of the valve core 220 when sealing the sewage channel 240, and effectively avoid the leakage caused by the displacement of the valve core 220 due to vibration. In another embodiment of the present invention, when the valve core 220 is in a horizontal cylindrical shape, in addition to the translation method, the driving member 230 can also drive the valve core 220 to rotate around the axis of the valve core 220, and the valve core 220 can also be switched between the sealing state and the drainage state.

[0031] Reference Figure 6 and Figure 7 As shown, Figure 6 and Figure 7The dotted line in the figure represents the structure of the blocked valve core 220. In the second embodiment of the present invention, the structure of the sewage channel 240 is similar to that of the sewage channel 240 in the first embodiment, and the main difference is that the shape of the mounting section 243 is different. The valve core 220 of this embodiment is in the shape of a round cake and can rotate around its own axis. Therefore, the shape of the mounting section 243 is adapted to the shape of the valve core 220, and the flow hole 222 and the center of the valve core 220 are arranged radially spaced. The driving member 230 is fixedly connected to the valve core 220, and the driving member 230 is configured to drive the valve core 220 to rotate around its own axis in the mounting section 243, so that the valve core 220 switches between the sealing state and the drainage state. The side wall of the valve body 210 is provided with an arc groove extending in the circumferential direction, and the driving member 230 is inserted in the arc groove and fixedly connected to the valve core 220. The driving member 230 can be controlled by external force to swing along the extension direction of the arc groove, thereby driving the valve core 220 to rotate. When the valve core 220 is in a sealing state, the end surface of the valve core 220 facing the first sewage discharge section 241 seals the lower end of the first sewage discharge section 241. When the valve core 220 is in a drainage state, the first sewage discharge section 241 is connected to the second sewage discharge section 242 through the flow hole 222, so that water passes through the first sewage discharge section 241, the flow hole 222, and the second sewage discharge section 242 in sequence, and finally discharges the sewage valve 200. The scheme of rotating the valve core 220 to switch the working state can realize the rapid opening and closing of the sewage valve 200, and the drainage efficiency is high.

[0032] Reference Fig. 9 , Fig.10 and Fig.11 As shown, in the third embodiment of the present invention, the drain channel 240 is extended in the up-down direction, and the drain channel 240 includes a sealing section 244, and the cross-sectional area of ​​the sealing section 244 gradually decreases in the up-to-down direction. The inner wall of the sealing section 244 is the second mating surface 247, the valve core 220 is spherical and the outer wall is the first mating surface 223, the first mating surface 223 is sealed by the sealing layer 221 and the second mating surface 247, and the sealing layer 221 is arranged on the first mating surface 223 as an example for explanation. The valve body 210 is provided with a connecting portion 250, and the connecting portion 250 is located at the lower end of the drain channel 240. The driving member 230 is connected to the connecting portion 250 and inserted into the drain channel 240, and the driving member 230 is configured to be able to drive the valve core 220 to move in the down-to-up direction, thereby opening the drain channel 240. It can be understood that when drainage is required, such as Fig.11 As shown, the driving member 230 is rotated or pushed to move upward, thereby lifting the valve core 220 so that the valve core 220 and the inner wall of the sealing section 244 are separated, and the water in the sewage channel 240 can pass through the sealing section 244 and then be discharged. Fig.10As shown, by rotating the driving member 230 or pulling the driving member 230 to move downward, the valve core 220 can move downward under the action of water pressure and its own gravity and seal with the inner wall of the sealing section 244, thereby blocking the sewage discharge channel 240. With the above solution, the water pressure is used to assist the valve core 220 in sealing the sewage discharge channel 240, which can improve the sealing performance of the valve core 220 and ensure that the sealing layer 221 always elastically abuts against the second mating surface 247 of the sealing section 244, thereby achieving a better sealing effect.

[0033] Reference Fig. 9 and Fig.10 As shown, in an embodiment of the present invention, the driving member 230 is threadedly connected to the connecting portion 250. Therefore, by rotating the driving member 230, the relative position of the driving member 230 and the valve body 210 can be changed, so that the driving member 230 can move in the up and down directions, thereby driving the valve body 210 to move. The driving member 230 includes a connecting rod 231 and an actuating portion 232, the connecting rod 231 is threadedly connected to the connecting portion 250, and the actuating portion 232 is fixedly connected to the lower end of the connecting rod 231. The actuating portion 232 is constructed in a nut shape, so that it is convenient to use a tool such as a wrench to drive the driving member 230 to rotate. With the above scheme, the driving member 230 can be used to adjust the valve core 220 to move to different positions, thereby adjusting the water flow during drainage, meeting the use requirements in different situations, and improving the user experience.

[0034] Reference Fig. 9 As shown, in the embodiment of the present invention, the connection part 250 includes a connection block 251 and a plurality of legs 252, the connection block 251 and the lower end of the drain channel 240 are arranged at intervals, and the plurality of legs 252 are arranged at intervals along the circumference of the connection block 251 and the two ends are connected to the end of the valve body 210 and the connection block 251. For example, there are three legs 252, and the three legs 252 are evenly spaced along the circumference of the connection block 251. A drain port 253 is formed between adjacent legs 252, and the drain port 253 is connected to the lower end of the drain channel 240. The connection block 251 is provided with a first threaded hole 254 threadedly connected to the connecting rod 231. Therefore, when the drain channel 240 is draining, it can be discharged through the drain port 253, and the provision of a plurality of drain ports 253 can improve the drainage efficiency.

[0035] Reference Fig.12 and Fig.13As shown, in the fourth embodiment of the present invention, the structure of the sewage valve 200 of the fourth embodiment is basically similar to that of the sewage valve 200 of the third embodiment, and the beneficial effects of similar structures are also similar, which will not be repeated here. The main difference is that the valve core 220 of the fourth embodiment includes a truncated cone portion 224, and the side surface of the truncated cone portion 224 is an inclined surface with the same inclination angle as the sealing section 244. The side surface of the truncated cone portion 224 is a first mating surface 223, which can be sealed with the second mating surface 247 of the sealing section 244. When the sewage valve 200 is in a sealed state, refer to Fig.12 As shown, the valve core 220 moves downward under the action of water pressure and its own gravity, so that the first mating surface 223 of the truncated cone 224 and the second mating surface 247 of the sealing section 244 are sealed and matched through the sealing layer 221, thereby blocking the sewage channel 240. When the sewage valve 200 is in the drainage state, refer to Fig.13 As shown, the driving member 230 lifts the valve core 220, so that the valve core 220 and the inner wall of the sealing section 244 are spaced apart, thereby opening the sewage discharge channel 240, which is conducive to the discharge of sewage. The valve core 220 includes a truncated cone portion 224. Since the side surface of the truncated cone portion 224 and the inner wall of the sealing section 244 have the same inclination angle and direction, the two have a larger contact area and a better sealing effect.

[0036] Reference Fig.14 and Fig.15 As shown, in the fifth embodiment of the present invention, the sewage channel 240 is extended in the up-down direction, and the sewage channel 240 includes a third sewage section 245 and a fourth sewage section 246 which are connected. The fourth sewage section 246 is located at the lower end of the third sewage section 245. The inner diameter of the third sewage section 245 is larger than the inner diameter of the fourth sewage section 246. A second mating surface 247 is formed between the third sewage section 245 and the fourth sewage section 246. A first mating surface 223 is provided on the side of the valve core 220 facing the second mating surface 247. The first mating surface 223 can be sealed with the second mating surface 247 through the sealing layer 221. It can be understood that since the inner diameters of the third sewage section 245 and the fourth sewage section 246 are different, a step is formed between the two. The step surface constitutes the second mating surface 247, which can be abutted and sealed with the first mating surface 223 of the valve core 220. When the sewage valve 200 is in a sealed state, such as Fig.14 As shown, under the action of water pressure, the first mating surface 223 and the second mating surface 247 are sealed and matched, so that the valve core 220 seals the sewage channel 240. When the sewage valve 200 is in the drainage state, as shown in FIG. Fig.15 As shown, the driving member 230 lifts the valve core 220, so that the valve core 220 and the second matching surface 247 are separated, which is conducive to the discharge of water from the sewage channel 240. With the above solution, the valve body 210 and the valve core 220 are simple and convenient to manufacture, and the sealing effect is good.

[0037] Reference Figures 10 to 15 As shown, in an embodiment of the present invention, when the valve core 220 is in a drainage state, the driving member 230 abuts against and lifts the valve core 220, so that the valve core 220 opens the sewage channel 240, which is conducive to the discharge of sewage. When the valve core 220 is in a sealed state, the driving member 230 and the valve core 220 are separated, and the valve core 220 automatically seals the sewage channel 240 under the action of water pressure. Therefore, the valve core 220 and the driving member 230 are not fixedly connected, which is conducive to the valve core 220 being able to automatically seal the sewage channel 240 under the action of water pressure when switching to the sealing state, and also can fine-tune the radial position of the valve core 220 under the action of water pressure, so as to achieve a better sealing effect. In another embodiment of the present invention, the driving member 230 can also be fixedly connected to the valve core 220, so as to avoid the situation where the valve core 220 is misaligned and the sewage channel 240 cannot be sealed. The appropriate solution is selected according to the actual situation.

[0038] Reference Fig.10 and Fig.12 As shown, in the embodiment of the present invention, the upper end of the valve body 210 is provided with a second threaded hole 212 communicating with the drain channel 240, the bottom of the second threaded hole 212 is provided with a sealing ring 211, the second threaded hole 212 is threadedly connected to the drain connector 150, the sealing ring 211 abuts against the lower end of the drain connector 150, and is arranged around the inlet end of the drain channel 240. The valve body 210 and the drain connector 150 are threadedly connected, which can improve the installation efficiency of the valve body 210 and the drain connector 150, and the provision of the sealing ring 211 can effectively prevent water from seeping out from the gap between the drain connector 150 and the valve body 210, thereby improving the waterproof performance of the drain valve 200.

[0039] 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 fuselage comprises an outer shell and an inner liner, wherein the inner liner is arranged inside the outer shell, and the fuselage is provided with a sewage discharge joint, wherein the inner cavity of the sewage discharge joint is connected to the inner cavity of the inner liner; A sewage valve, comprising a valve body, a valve core and a driving member, wherein the valve body is sealed and connected to the sewage connector, the valve body is provided with a sewage channel, one end of the sewage channel is communicated with the inner cavity of the sewage connector, and the other end of the sewage channel passes through the outer wall of the valve body, the valve core is arranged in the sewage channel, and the driving member is inserted into the valve body and used to drive the valve core to move or rotate; Wherein, the valve core has a first mating surface, and the sewage discharge channel has a second mating surface. At least one of the first mating surface or the second mating surface is provided with a sealing layer. The valve core has a sealing state and a drainage state. When the valve core is in the sealing state, the first mating surface is sealed with the sealing layer and the second mating surface to seal the sewage discharge channel. When the valve core is in the drainage state, the valve core opens the sewage discharge channel.

2. The water heater according to claim 1, characterized in that: The sealing layer is made of one of plastic, rubber or silicone.

3. The water heater according to claim 1, characterized in that: The sewage discharge channel includes a first sewage discharge section, an installation section and a second sewage discharge section, the first sewage discharge section is connected to the inner cavity of the sewage discharge joint, the second sewage discharge section and the first sewage discharge section are arranged at intervals and pass through the end surface of the valve body, the installation section is located between the first sewage discharge section and the second sewage discharge section, the valve core is installed on the installation section, the side of the valve core facing the first sewage discharge section is the first mating surface, and the side of the installation section facing the first mating surface is the second mating surface, the valve core is provided with a flow hole, when the valve core is in the drainage state, the two ends of the flow hole are connected to the first sewage discharge section and the second sewage discharge section.

4. The water heater according to claim 3, characterized in that: The driving member is connected to the valve core, and the driving member is configured to drive the valve core to translate, so that the valve core switches between the sealing state and the drainage state.

5. The water heater according to claim 3, characterized in that: The driving member is fixedly connected to the valve core, and the driving member is configured to be able to drive the valve core to rotate in the installation section, so that the valve core switches between the sealing state and the drainage state.

6. The water heater according to claim 1, characterized in that: The sewage discharge channel is extended in the up-down direction, and the sewage discharge channel includes a sealing section, and the cross-sectional area of ​​the sealing section gradually decreases in the up-to-down direction. The inner wall of the sealing section is the second mating surface, and the valve body is provided with a connecting portion located at the lower end of the sewage discharge channel, and the driving member is connected to the connecting portion and inserted in the sewage discharge channel, and the driving member is configured to be able to drive the valve core to move in the down-to-up direction to open the sewage discharge channel.

7. The water heater according to claim 6, characterized in that: The driving member is threadedly connected to the connecting portion.

8. The water heater according to claim 7, characterized in that: The connecting portion includes a connecting block and a plurality of legs, the connecting block and the lower end of the sewage channel are spaced apart, the plurality of legs are spaced apart along the circumference of the connecting block and both ends are connected to the end of the valve body and the connecting block, a drain port is formed between adjacent legs, and the connecting block is provided with a first threaded hole connected to the driving member.

9. The water heater according to claim 7, characterized in that: The valve core is spherical; or, the valve core includes a truncated cone portion, and the side wall of the truncated cone portion is configured to be able to seal and cooperate with the inner wall of the sealing section.

10. The water heater according to claim 1, characterized in that: The sewage discharge channel is extended in the up-down direction, and the sewage discharge channel includes a third sewage discharge section and a fourth sewage discharge section that are connected. The fourth sewage discharge section is located at the lower end of the third sewage discharge section. The inner diameter of the third sewage discharge section is larger than the inner diameter of the fourth sewage discharge section. The second mating surface is formed between the third sewage discharge section and the fourth sewage discharge section. The first mating surface is provided on the side of the valve core facing the second mating surface, and the first mating surface can be sealed and matched with the second mating surface.

11. The water heater according to any one of claims 6 to 10, characterized in that: When the valve core is in the sealing state, the driving member is separated from the valve core, and when the valve core is in the drainage state, the driving member abuts against and lifts the valve core.

12. The water heater according to claim 1, characterized in that: A sealing ring is provided between the valve body and the end of the sewage discharge joint, and the sealing ring is arranged around the inlet end of the sewage discharge channel.

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