Water outlet valve and water heater

Abstract

The utility model discloses a water outlet valve and a water heater, and relates to the technical field of water heaters, the water outlet valve comprises a shell, a valve core and a sealing element, a valve hole is arranged in the shell, the outer wall of the shell is provided with a communicating hole, the communicating hole is positioned at the upper end of a motion path of the valve core, and the communicating hole is used for communicating the shell with a water inlet end of a water inlet valve of a water inlet pipe. When the water outlet pipe stops discharging water, the valve element can move upwards to close the valve hole and drive the sealing piece to move upwards to close the communicating hole, at the moment, the water inlet valve is not communicated with the water outlet valve, the water inlet valve is closed, and the water tank cannot supplement water. When the water tank leaks water, the water outlet end pressure of the water inlet valve is smaller than the water inlet end pressure due to the fact that the pressure in the water tank is reduced, the water inlet valve is kept in a closed state under the action of pressure difference, and the water tank cannot supplement water; after part of water leaks from the water tank, the pressure in the water tank is balanced with the atmospheric pressure, and the water tank stops leaking water, so that the problem of continuous water leakage of the water tank can be effectively inhibited.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a water outlet valve and a water heater. Background Art

[0002] Household appliances such as electric water heaters and heat pump water heaters have a water tank. The water tank's inlet pipe is connected to the tap water network, and the water tank's outlet pipe is connected to a water terminal with an on / off valve, such as a faucet or showerhead. When the on / off valve is opened, the terminal releases water from the tank through the outlet pipe. Since the pressure in the tank decreases and the water pressure in the tap water network is relatively constant, water is replenished into the tank through the inlet pipe. If the water tank leaks, the tap water network will continue to replenish the water tank, causing the tank to remain leaking. Utility Model Content

[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 outlet valve installed on the water outlet pipe, which can keep the water inlet valve installed on the water inlet pipe closed after the water terminal is closed, thereby restricting the water inlet pipe from replenishing water to the water tank, solving the problem of the water inlet pipe continuing to replenish water to the water tank after the water tank leaks.

[0004] The utility model also provides a water heater with the water outlet valve.

[0005] The water outlet valve according to the embodiment of the first aspect of the present invention is used for a water tank including a water inlet pipe and a water outlet pipe, comprising: a shell connected to the water outlet pipe, a valve hole being provided inside the shell; a valve core being provided in the shell and capable of moving in the up and down directions; a sealing member being fixedly connected to the upper end portion of the valve core; wherein the outer wall of the shell is provided with a connecting hole, the connecting hole being located at the upper end of the movement path of the valve core, the connecting hole connecting the interior of the shell and the water inlet end of the water inlet valve installed on the water inlet pipe; the valve core is configured to be able to move upward to close the valve hole and to close the connecting hole through the sealing member when the water outlet pipe stops discharging water, and to move downward to open the valve hole and drive the sealing member to open the connecting hole when water is discharging from the water outlet pipe.

[0006] The water outlet valve according to the embodiment of the utility model has at least the following beneficial effects:

[0007] The invention provides a housing, a valve core, and a sealing member located within the housing. The housing has a valve hole, and the outer wall of the housing has a connecting hole. The connecting hole is located at the upper end of the movement path of the valve core, and the connecting hole is used to connect the housing with the water inlet end of the water inlet valve of the water inlet pipe. When water flows out of the outlet pipe, the water flow in the outlet valve causes the valve core to move downward to open the valve hole, and drives the sealing member to move downward to open the connecting hole. At this time, the water inlet valve and the water outlet valve are connected, and the water in the water inlet valve flows toward the water outlet valve, thereby driving the water inlet valve to open, and the water tank is replenished with water through the water inlet pipe. When the water outlet pipe stops discharging water, the valve core can move upward to close the valve hole, and drives the sealing member to move upward to close the connecting hole. At this time, the water inlet valve and the water outlet valve are disconnected, the water inlet valve is closed, and the water tank cannot be replenished with water. When the water tank leaks, the pressure inside the water tank decreases, making the pressure at the outlet end of the water inlet valve lower than the pressure at the water inlet end. Therefore, the water inlet valve remains closed under the action of the pressure difference, and the water tank cannot be replenished with water. After the water tank leaks some water, the pressure inside the water tank is balanced with the atmospheric pressure, and the water tank stops leaking, thus effectively suppressing the problem of continuous leakage of the water tank.

[0008] According to some embodiments of the present utility model, the valve core includes a float valve and a float ball, the float ball is fixedly connected to the outer peripheral wall of the float valve, the float valve includes a guide part and an actuating part, the guide part is connected to the upper end of the actuating part, the guide part is provided with a flow channel for water to flow into the interior of the float valve, the actuating part is provided at the end of the flow channel, and the actuating part is provided with a water outlet hole for the water flow in the flow channel to be discharged from the outer peripheral wall of the actuating part.

[0009] According to some embodiments of the present invention, the valve hole is located on a side opposite to at least part of the outer peripheral wall of the float valve, the center line of the flow channel is arranged in the up and down directions and passes through the guide part, and the outer peripheral wall of the guide part is provided with a water hole that can connect the flow channel and the valve hole.

[0010] According to some embodiments of the present invention, a groove is provided on a side of the actuating portion facing the flow channel, and the groove is directly opposite to the end of the flow channel.

[0011] According to some embodiments of the present invention, the housing further includes a guide sleeve extending in an up-down direction, and the float valve is slidably connected in the guide sleeve.

[0012] According to some embodiments of the present invention, the housing further includes a lower limit portion, and when the valve core moves to an end away from the communicating hole, the float abuts against the lower limit portion.

[0013] According to some embodiments of the present invention, the water outlet pipe has an inlet end located in the water tank, and the upper end surface of the inlet end is higher than the upper end surface of the float.

[0014] According to some embodiments of the present invention, a recess is provided at the upper end of the sealing member, and a protrusion matching the recess is provided at the communicating hole inside the housing.

[0015] The water heater according to the second embodiment of the present invention includes a water tank and the water outlet valve described in the above embodiment, the water tank is connected to a water outlet pipe, and the water outlet valve is installed in the water outlet pipe.

[0016] The water heater according to the embodiment of the present invention has at least the following beneficial effects:

[0017] The outlet valve of the first embodiment is provided with a housing, a valve core, and a sealing member located within the housing. The housing is provided with a valve hole, and the outer wall of the housing is provided with a connecting hole. The connecting hole is located at the upper end of the valve core's movement path. The connecting hole is used to connect the housing with the water inlet end of the water inlet valve of the water inlet pipe. When water flows out of the water outlet pipe, the water flow in the water outlet valve causes the valve core to move downward to open the valve hole, and drives the sealing member to move downward to open the connecting hole. At this time, the water inlet valve and the water outlet valve are connected, and the water in the water inlet valve flows toward the water outlet valve, thereby driving the water inlet valve to open, and the water tank is replenished with water through the water inlet pipe. When the water outlet pipe stops discharging water, the valve core can move upward to close the valve hole, and drives the sealing member to move upward to close the connecting hole. At this time, the water inlet valve and the water outlet valve are disconnected, the water inlet valve is closed, and the water tank cannot be replenished with water. When the water tank leaks, the pressure inside the water tank decreases, making the pressure at the outlet end of the water inlet valve lower than the pressure at the water inlet end. Therefore, the water inlet valve remains closed under the action of the pressure difference, and the water tank cannot be replenished with water. After the water tank leaks some water, the pressure inside the water tank is balanced with the atmospheric pressure, and the water tank stops leaking, thus effectively suppressing the problem of continuous leakage of the water tank of the water heater.

[0018] According to some embodiments of the present invention, the water heater further includes a water inlet pipe connected to the water tank, a water inlet valve installed on the water inlet pipe, and a connecting pipe, wherein the connecting pipe is used to connect the water inlet end of the water inlet valve and the connecting hole.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a structural schematic diagram of a water outlet valve in an open state according to an embodiment of the present invention;

[0022] Figure 2 This is a structural schematic diagram of a water outlet valve in a closed state according to an embodiment of the present utility model;

[0023] Figure 3 for Figure 1 A magnified view of the structure of the middle valve core;

[0024] Figure 4 This is a structural diagram of a water heater according to an embodiment of the present invention, wherein the switch valve of the water terminal is in a closed state;

[0025] Figure 5 This is a structural diagram of a water heater according to an embodiment of the present invention, wherein the switch valve of the water terminal is in an open state.

[0026] Figure Number:

[0027] Water tank 100;

[0028] Water inlet pipe 200;

[0029] Outlet pipe 300; outlet pipe section 310; inlet end 320;

[0030] Water inlet valve 400; water inlet end 410; water outlet end 420;

[0031] Outlet valve 500; housing 510; valve hole 511; communicating hole 512; water inlet chamber 513; water outlet chamber 514; protrusion 515; guide sleeve 517; lower limit portion 518; water storage chamber 519; valve core 520; float valve 521; flow guide portion 5211; actuator 5212; water outlet hole 5213; groove 5214; water through hole 5215; float 522; guide block 523; sealing member 530; recess 531; flow channel 540; intermediate section 541;

[0032] Connecting pipe 600;

[0033] Water pipe 700;

[0034] Water use terminal 800; switch valve 810. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0037] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting 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.

[0039] Water heaters include heat pump water heaters, air energy water heaters, electric water heaters, and other types. Water heaters are commonly used to provide hot water for daily use such as showers and kitchens. They can also be used for heating, such as floor heating and heated towel racks. The water heater has a water tank 100. The water inlet of the water tank 100 is connected to the municipal water network through an inlet pipe 200. The water outlet of the water tank 100 is connected to a water terminal 800 through an outlet pipe 300. The water terminal 800 is generally a faucet, shower head, etc. The water terminal 800 has a switch valve 810. When the switch valve 810 is opened, the water terminal 800 releases the water in the water tank 100 through the outlet pipe 300. Since the pressure in the water tank 100 decreases and the water pressure in the water network is basically constant, water is replenished into the water tank 100 through the inlet pipe 200.

[0040] When the water tank 100 leaks, the tap water network will continue to replenish water to the water tank 100, causing the water tank 100 to remain in a leaking state. To solve the problem of continuous water leakage in the water tank 100, the embodiment of the utility model provides a water outlet valve 500 installed on the water outlet pipe 300. It can be used in conjunction with the water inlet valve 400 installed on the water inlet pipe 200. After the water terminal 800 is closed, the water inlet valve 400 can remain closed, thereby restricting the water inlet pipe 200 from replenishing water to the water tank 100, solving the problem of the water inlet pipe 200 continuously replenishing water to the water tank 100 after the water tank 100 leaks.

[0041] Reference Figure 1As shown, the outlet valve 500 of this embodiment includes a housing 510, a valve core 520, and a sealing member 530. The housing 510 can be connected to the outlet pipe 300 via pipe threads. The valve core 520 and the sealing member 530 are located within the housing 510. The sealing member 530 is fixed to the upper end of the valve core 520, and the valve core 520 moves in the up and down direction.

[0042] The outer wall of the housing 510 is provided with a connecting hole 512, which is located on the outer wall of the upper end of the housing 510 and at the upper end of the movement path of the valve core 520. The connecting hole 512 is used to connect the interior of the housing 510 with the water inlet end 410 of the water inlet valve 400. Figure 1 As shown, when the valve core 520 moves downward, the communication hole 512 is opened by driving the sealing member 530 downward; Figure 2 As shown, when the valve core 520 moves upward, the communication hole 512 is closed by driving the sealing member 530 to move upward. It is understandable that the sealing member 530 can be a sealing plug or a sealing ring, and the sealing member 530 can be made of sealing materials such as rubber and silicone.

[0043] The housing 510 is provided with a valve hole 511 inside, and the valve core 520 can move up and down to open or close the valve hole 511. Figure 1 and Figure 5 As shown, when the switch valve 810 of the water terminal 800 is opened, water flows out of the water outlet pipe 300, and the water flow in the shell 510 is driven to flow, so that the valve core 520 can move downward and drive the seal 530 to move downward, the valve hole 511 and the connecting hole 512 are opened, and the water inlet valve 400 is connected with the water outlet valve 500. The water in the water inlet valve 400 flows to the water outlet valve 500, thereby driving the water inlet valve 400 to open, and the water tank 100 is replenished with water through the water inlet pipe 200.

[0044] Reference Figure 2 and Figure 4 As shown, when the switch valve 810 of the water terminal 800 is closed, the water outlet pipe 300 stops discharging water, the water flow in the shell 510 stops flowing, the valve core 520 can move upward and drive the seal 530 to move upward, the valve hole 511 is closed, and the connecting hole 512 is closed by the seal 530. At this time, the water inlet valve 400 is not connected to the water outlet valve 500, the water inlet valve 400 is closed, and the water tank 100 cannot be replenished with water through the water inlet pipe 200.

[0045] When the water tank 100 leaks, the pressure inside the water tank 100 decreases, making the pressure at the water outlet end 420 of the water inlet valve 400 lower than the pressure at the water inlet end 410. Therefore, under the action of the pressure difference, the water inlet valve 400 remains closed, and the water tank 100 cannot be replenished with water. After the water tank 100 leaks some water, the pressure inside the water tank 100 is balanced with the atmospheric pressure, and the water tank 100 stops leaking, thereby effectively suppressing the problem of continuous leakage of the water tank 100.

[0046] Reference Figure 1 、 Figure 2 and Figure 3 As shown, the valve core 520 of one embodiment of the present invention includes a float valve 521 and a floating ball 522, which are located within the housing 510. The floating ball 522 is annular and fixedly connected to the outer peripheral wall of the float valve 521. The floating ball 522 is used to drive the valve core 520 to float upward when water in the housing 510 is not flowing. The float valve 521 is used to drive the valve core 520 to move downward when water in the housing 510 is flowing.

[0047] The float valve 521 includes a flow guide portion 5211 and an actuator portion 5212. The float valve 521 is in the shape of a vertically extending strip. The flow guide portion 5211 and the actuator portion 5212 are arranged vertically. The flow guide portion 5211 is connected to the upper end of the actuator portion 5212, and the seal 530 is connected to the upper end of the flow guide portion 5211. The flow guide portion 5211 defines a flow channel 540 for allowing water to flow into the float valve 521. The flow channel 540 includes a middle section 541 extending vertically. The starting point of the flow channel 540 can be configured to pass through the upper end of the flow guide portion 5211 or through the outer peripheral wall of the flow guide portion 5211, thereby guiding the water flowing within the housing 510 to the middle section 541.

[0048] The actuator 5212 is located at the end of the flow channel 540. After flowing through the intermediate section 541, the water impacts the actuator 5212 at the end of the flow channel 540, providing a force for the float valve 521 to move downward. The force exerted by the water on the float valve 521 is greater than the buoyancy of the float ball 522, enabling the valve core 520 to move downward under the influence of the flowing water. The outer wall of the actuator 5212 is provided with a water outlet hole 5213, which is connected to the intermediate section 541. The water outlet hole 5213 is used to discharge the water from the flow channel 540 from the outer wall of the actuator 5212, allowing the water from the flow channel 540 to flow radially out of the float valve 521. It is understood that multiple water outlet holes 5213 can be provided, and the multiple water outlet holes 5213 are evenly distributed along the circumference of the actuator 5212 to facilitate force balance on the float valve 521.

[0049] A groove 5214 is provided on the side of the actuator 5212 facing the flow channel 540, and the groove 5214 is opposite to the end of the flow channel 540. Water flows into the groove 5214 and then flows out through the water outlet 5213, which can concentrate the force of the water flow on the actuator 5212 and make the force on the float valve 521 more uniform.

[0050] Reference Figure 1 、 Figure 2 and Figure 3 As shown, in a water outlet valve 500 according to an embodiment of the present invention, a valve hole 511 is located on a side opposite at least a portion of the outer peripheral wall of a float valve 521. The housing 510 forms a water inlet chamber 513 and a water outlet chamber 514 at both ends of the valve hole 511. The centerline of the flow channel 540 is arranged in the vertical direction. The flow channel 540 passes through the guide portion 5211, that is, the starting end of the flow channel 540 is located at the upper end of the guide portion 5211, and the end of the flow channel 540 is located at the lower end of the guide portion 5211. The outer peripheral wall of the guide portion 5211 is provided with a water through hole 5215, which is connected to the middle section 541 of the guide portion 5211. Water flows out of the valve hole 511 through the water through hole 5215. When water flows through the water outlet valve 500, the valve core 520 moves downward under the impact of the water flow. At this time, the valve hole 511 is opened, that is, the water hole 5215 and the valve hole 511 are at least partially aligned. After the water flows into the flow channel 540, part of the water flows out through the water hole 5215 and the valve hole 511, and the other part of the water flows out through the water outlet hole 5213. The two streams of water converge in the shell 510 and then discharge from the water outlet valve 500.

[0051] Reference Figure 1 and Figure 2 As shown, in the water outlet valve 500 of an embodiment of the present invention, the connecting hole 512 is located at the lower end of the shell 510, and a recess 531 is provided at the lower end of the sealing member 530. The shell 510 forms a convex portion 515 at the connecting hole 512. When the valve core 520 moves upward and drives the sealing member 530 to the position of sealing the connecting hole 512, the recess 531 and the convex portion 515 are adapted to each other, thereby improving the sealing effect of the sealing member 530 on the connecting hole 512.

[0052] It can be understood that the connecting hole 512 is set on the outer wall of the water inlet chamber 513 or the outer wall of the water outlet chamber 514, that is, it connects the water inlet chamber 513 or the water outlet chamber 514. The specific design can be based on the structure of the actual product and is no longer specifically limited here.

[0053] Reference Figure 1 and Figure 2As shown, a water outlet valve 500 according to one embodiment of the present invention includes a guide sleeve 517 within the housing 510. The guide sleeve 517 extends in the vertical direction, and a float valve 521 is slidably connected within the guide sleeve 517. The guide sleeve 517 guides and limits the vertical movement of the float valve 521, thereby improving the movement stability of the float valve 521. A guide block 523 is provided on the outer peripheral wall of the float valve 521. The guide block 523 slidably cooperates with the inner wall of the guide sleeve 517 to improve the movement reliability of the float valve 521.

[0054] Continue to refer to Figure 1 and Figure 2 As shown, the housing 510 further includes a lower limit portion 518, which can be fixedly connected to the guide sleeve 517. When the valve core 520 moves to the end away from the communication hole 512, the float 522 abuts against the lower limit portion 518, which helps prevent the bottom of the valve core 520 from colliding with the housing 510 and causing damage.

[0055] Reference Figure 1 As shown, the shell 510 has a downwardly extending water storage chamber 519, which can store a certain amount of water. At least part of the structure of the valve core 520 is located in the water storage chamber 519, so as to ensure that when the water flow in the shell 510 stops flowing, the valve core 520 can rely on the buoyancy of the water in the water storage chamber 519 to move upward and close the connecting hole 512; and when the water tank 100 leaks, the valve core 520 can also rely on the buoyancy of the water in the water storage chamber 519 to keep the connecting hole 512 closed, thereby suppressing the water tank 100 from continuing to leak.

[0056] Reference Figure 1 and Figure 4 As shown, the water outlet pipe 300 has an inlet end 320 located in the water tank 100, and the upper end surface of the inlet end 320 is higher than the upper end surface of the float 522. Therefore, when the water flow in the water outlet pipe 300 stops, the valve core 520 can move upward due to the buoyancy of the water in the housing 510, thereby sealing the communication hole 512. Moreover, when the water tank 100 leaks, a certain amount of water still remains in the housing 510, and the valve core 520 can also rely on the buoyancy of the remaining water in the housing 510 to maintain the sealing of the communication hole 512, thereby preventing the water tank 100 from leaking.

[0057] Reference Figure 4 and Figure 5As shown, the water heater of the present invention includes a water tank 100 and the water outlet valve 500 described in the above embodiment. The water outlet valve 500 is installed in the water outlet pipe 300. The water tank 100 is connected to a water inlet pipe 200 and a water outlet pipe 300. One end of the water inlet pipe 200 is connected to a tap water pipe 700, and the other end of the water inlet pipe 200 is connected to the interior of the water tank 100. The end of the water inlet pipe 200 near the tap water pipe 700 has a certain water pressure, and the tap water pipe 700 replenishes water to the water tank 100 through the water inlet pipe 200. One end of the water outlet pipe 300 is connected to a water terminal 800, and the other end of the water outlet pipe 300 is connected to the interior of the water tank 100. Water in the water tank 100 is discharged to the water terminal 800 through the water outlet pipe 300.

[0058] According to an embodiment of the present invention, a water heater employs the water outlet valve 500 of the above-described embodiment. The water outlet valve 500 comprises a housing 510, a valve core 520 located within the housing 510, and a sealing member 530. The housing 510 defines a valve hole 511, and the outer wall of the housing 510 defines a communication hole 512. The communication hole 512 is located at the upper end of the movement path of the valve core 520. The communication hole 512 is used to connect the housing 510 with the water inlet end 410 of the water inlet valve 400 of the water inlet pipe 200. When water flows out of the water outlet pipe 300, the water flow within the water outlet valve 500 causes the valve core 520 to move downward to open the valve hole 511, and drives the sealing member 530 to move downward to open the communication hole 512. At this time, the water inlet valve 400 is connected to the water outlet valve 500, and the water in the water inlet valve 400 flows toward the water outlet valve 500, thereby driving the water inlet valve 400 to open, and the water tank 100 is replenished with water through the water inlet pipe 200. When the outlet pipe 300 stops discharging water, the valve core 520 can move upward to close the valve hole 511, and drive the seal 530 to move upward to close the connecting hole 512. At this time, the water inlet valve 400 and the water outlet valve 500 are disconnected, the water inlet valve 400 is closed, and the water tank 100 cannot be refilled with water. When the water tank 100 leaks, the pressure in the water tank 100 decreases, making the pressure at the water outlet end 420 of the water inlet valve 400 lower than the pressure at the water inlet end 410. Therefore, due to the pressure difference, the water inlet valve 400 remains closed, and the water tank 100 cannot be refilled. After the water tank 100 leaks some water, the pressure in the water tank 100 balances with the atmospheric pressure, and the water tank 100 stops leaking. This effectively prevents the water tank 100 from continuously leaking.

[0059] Since the water heater of the embodiment of the present utility model adopts all the technical solutions of the water outlet valve 500 of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described in detail here.

[0060] Reference Figure 4 and Figure 5As shown, the water heater of the present invention includes a water inlet valve 400, a water outlet valve 500, and a connecting pipe 600. The water inlet valve 400 is installed in the water inlet pipe 200, and one end of the water inlet valve 400 can be installed in the water inlet pipe 200 via a pipe thread. In this embodiment, one end of the water inlet pipe 200 is inserted into the water tank 100, and the other end of the water inlet pipe 200 extends outward from the water tank 100. One end of the water inlet valve 400 is connected to the other end of the water inlet pipe 200, and the other end of the water inlet valve 400 is connected to the tap water pipe 700. Alternatively, the water inlet pipe 200 can also include multiple water inlet pipe 200 sections, with the water inlet valve 400 installed between two water inlet pipe 200 sections. The water outlet valve 500 is installed in the water outlet pipe 300, and the water outlet valve 500 can be installed in the water outlet pipe 300 via a pipe thread. In this embodiment, the water outlet pipe 300 includes multiple water outlet pipe sections 310. One end of the water outlet pipe section 310 is inserted into the water tank 100 and extends outward from the water tank 100. Another end of the water outlet pipe section 310 is connected to the water terminal 800. The water outlet valve 500 is installed between the two water outlet pipe sections 310. The connecting pipe 600 is connected between the water inlet valve 400 and the water outlet valve 500. The connecting pipe 600 can be a rigid pipe or a flexible pipe.

[0061] Reference Figure 4 As shown, in this embodiment of the present invention, the connecting pipe 600 is used to connect the connecting hole 512 and the water inlet end 410 of the water inlet valve 400, thereby connecting the water inlet valve 400 and the water outlet valve 500. When the switch valve 810 of the water terminal 800 is in the closed state, the water outlet pipe 300 stops discharging water, the housing 510 is filled with water and the water flow stops, the valve core 520 can move upward and drive the sealing member 530 to move upward, the valve hole 511 is closed, the connecting hole 512 is closed by the sealing member 530, the water outlet valve 500 remains in the state of closing the connecting hole 512, the pressure in the inner cavity of the water inlet valve 400 is balanced, and the water inlet valve 400 is in the closed state. When water tank 100 leaks, the pressure inside tank 100 decreases, and the pressure at the water outlet 420 of inlet valve 400 decreases, while the pressure at the water inlet 410 of inlet valve 400 remains unchanged. Therefore, due to the pressure differential, inlet valve 400 remains closed, and water tank 100 cannot be replenished through inlet pipe 200. When some water leaks from tank 100, the pressure inside tank 100 equalizes with atmospheric pressure. That is, the pressure inside and outside the leaking hole of tank 100 equalizes, preventing water from leaking out through the hole. At this point, the leaking of tank 100 stops. Therefore, the water heater of this embodiment effectively prevents the problem of continuous water leakage from tank 100.

[0062] Reference Figure 5As shown, in the water heater of the embodiment of the present invention, when the switch valve 810 of the water terminal 800 is opened, water flows out of the water outlet pipe 300, and the water flow in the shell 510 is driven to flow, so that the valve core 520 can move downward and drive the seal 530 to move downward, the valve hole 511 and the connecting hole 512 are opened, and the water at the water inlet end 410 of the water inlet valve 400 flows into the shell 510, and the water flow in the water inlet valve 400 is driven to flow, so that the water inlet valve 400 is in an open state, and water is replenished into the water tank 100 through the water inlet valve 400.

[0063] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A water outlet valve for a water tank comprising an inlet pipe and an outlet pipe, characterized in that: include: A shell connected to the water outlet pipe, wherein a valve hole is provided inside the shell; A valve core is disposed in the housing and is capable of moving in an up-down direction; a sealing member fixedly connected to the upper end portion of the valve core; The outer wall of the housing is provided with a communication hole, the communication hole is located at the upper end of the movement path of the valve core, and the communication hole communicates with the interior of the housing and the water inlet end of the water inlet valve installed on the water inlet pipe; The valve core is configured to move upward to close the valve hole and close the communicating hole through the sealing member when the water outlet pipe stops discharging water, and to move downward to open the valve hole and drive the sealing member to open the communicating hole when the water outlet pipe discharges water.

2. The water outlet valve according to claim 1, characterized in that: The valve core includes a float valve and a float ball, the float ball is fixedly connected to the outer peripheral wall of the float valve, the float valve includes a guide part and an actuating part, the guide part is connected to the upper end of the actuating part, the guide part is provided with a flow channel for water to flow into the interior of the float valve, the actuating part is provided at the end of the flow channel, and the actuating part is provided with a water outlet hole for the water flow in the flow channel to be discharged from the outer peripheral wall of the actuating part.

3. The water outlet valve according to claim 2, characterized in that: The valve hole is located on a side opposite to at least part of the outer peripheral wall of the float valve. The center line of the flow channel is arranged in the up and down direction and passes through the guide part. The outer peripheral wall of the guide part is provided with a water hole that can connect the flow channel and the valve hole.

4. The water outlet valve according to claim 2, characterized in that: A groove is provided on a side of the actuating portion facing the flow channel, and the groove is directly opposite to the end of the flow channel.

5. The water outlet valve according to claim 2, characterized in that: The housing further comprises a guide sleeve extending in an up-down direction, and the float valve is slidably connected in the guide sleeve.

6. The water outlet valve according to claim 2, characterized in that: The housing further includes a lower limit portion, and when the valve core moves to an end away from the communicating hole, the float abuts against the lower limit portion.

7. The water outlet valve according to claim 2, characterized in that: The water outlet pipe has an inlet end located in the water tank, and the upper end surface of the inlet end is higher than the upper end surface of the float.

8. The water outlet valve according to claim 1, characterized in that: A recess is provided at the upper end of the sealing member, and a protrusion matched with the recess is provided at the communicating hole inside the housing.

9. A water heater, characterized in that: include: a water tank connected to a water outlet pipe; The water outlet valve according to any one of claims 1 to 8 is installed in the water outlet pipe.

10. The water heater according to claim 9, characterized in that: The water heater further comprises a water inlet pipe connected to the water tank, a water inlet valve installed on the water inlet pipe, and a connecting pipe, wherein the connecting pipe is used to connect the water inlet end of the water inlet valve and the connecting hole.

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