Hot water injection valve
By setting the drain pipe in the hot water injection valve on the inside of the connection corner between the inlet pipe and the outlet pipe, the water backflow and excessive volume caused by wear of the hot water injection valve is solved, and structural optimization, volume reduction and strength improvement are achieved, which helps to extend the service life.
Patent Information
- Application Number
- CN202422105108.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-29
AI Technical Summary
The existing hot water injection valve is prone to wear after long-term use, causing the water at the water consumption end to flow back into the water inlet pipe, contaminating the water source at the hot water supply end. At the same time, the overall volume of the hot water injection valve is large, and there may be insufficient strength, which affects the service life.
A heat injection valve is designed, and its drain pipe is arranged inside the connecting corner between the inlet pipe and the outlet pipe. The drain pipe is connected to the chamber between the first one-way valve and the second one-way valve to discharge accumulated water, optimize the internal flow passage and the overall structure, reduce the volume and space occupied, and improve the structural strength.
By optimizing the structure of the hot-injection water valve, the distance between the water inlet chamber and the drain chamber is shortened, the volume and space occupied are reduced, the structural strength is improved, which is conducive to extending the service life and preventing water backflow contamination.
Smart Images
Figure CN222992245U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hot water injection valves, in particular to a hot water injection valve. Background Art
[0002] A hot water injection valve is installed in the pipe for supplying hot water or warm water from a hot water supply device to a water-using end. Two one-way valve cores are arranged at intervals in the water outlet pipe of the hot water injection valve. Hot water enters the hot water injection valve through the pipe, and then flows through the two one-way valve cores and then flows from the water outlet of the water outlet pipe to the water-using end.
[0003] Since the one-way valve cores in the water outlet pipe are prone to wear and other conditions after long-term use, after the water supply in the water inlet pipe of the hot water injection valve stops, the water at the water-using end is likely to flow back into the water inlet pipe, polluting the water source at the hot water supply end. The internal pipeline of the existing drain pipe of the hot water injection valve is relatively complex and the length of the annular flow path is long, resulting in a relatively large overall volume of the hot water injection valve, and there may be a situation of insufficient strength, affecting the service life of the hot water injection valve. Content of the Utility Model
[0004] The purpose of the utility model is to provide a hot water injection valve to optimize the structure of the hot water injection valve, reduce the volume and occupied space of the hot water injection valve, and improve the structural strength of the hot water injection valve.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] A hot water injection valve, comprising:
[0007] A water inlet pipe for introducing hot water;
[0008] A water outlet pipe, which is cross-connected with the water inlet pipe for leading out hot water, and a first one-way valve and a second one-way valve are separately arranged in the water outlet pipe;
[0009] A switching valve group, which is arranged on the communication path between the water inlet pipe and the water outlet pipe for opening or closing the communication path;
[0010] A drain pipe for discharging the water accumulated between the first one-way valve and the second one-way valve, the drain pipe is arranged inside the connection corner between the water inlet pipe and the water outlet pipe, and the drain pipe is communicated with the chamber between the first one-way valve and the second one-way valve.
[0011] As an optional scheme of the hot water injection valve, the water outlet pipe is integrally connected with the drain pipe, a drainage channel is arranged between the water outlet pipe and the drain pipe, the chamber between the first one-way valve and the second one-way valve is communicated with the inlet of the drainage channel, a drainage chamber is arranged in the drain pipe, and the outlet of the drainage channel is communicated with the drainage chamber.
[0012] As an alternative to the hot water injection valve, the drainage channel is inclined downward from the inlet to the outlet, and the outlet of the drainage channel communicates with the bottom of the drainage cavity.
[0013] As an alternative to the hot water injection valve, the inclination angle of the drainage channel is 20° to 70°.
[0014] As an alternative to the hot water injection valve, the inclination angle of the drainage channel is 60°.
[0015] As an alternative to the hot water injection valve, a circular pipe is arranged along the extension direction of the outlet pipe at the connection of the outlet pipe and the inlet pipe, and the inlet pipe, the circular pipe and the outlet pipe are communicated; the switching valve group is located on the axis of the outlet pipe and can open or close the circular pipe.
[0016] As an alternative to the hot water injection valve, the switching valve group is an electromagnetic valve. When the electromagnetic valve is energized, it opens the circular pipe, and when the electromagnetic valve is de-energized, it closes the circular pipe.
[0017] As an alternative to the hot water injection valve, the switching valve group includes a housing, a moving iron core and a sealing seat; the housing is fixedly installed along the axial direction of the outlet pipe on the communication path between the inlet pipe and the outlet pipe; the moving iron core is movably arranged in the housing to drive the sealing seat to open or close the circular pipe.
[0018] As an alternative to the hot water injection valve, the drain pipe has a drain port, and a drainage component is movably arranged in the drain pipe, and the drainage component can open or close the drain port.
[0019] As an alternative to the hot water injection valve, the outlet pipe and the inlet pipe are orthogonally communicated, and the drain pipe is located inside the right-angle corner of the inlet pipe and the outlet pipe.
[0020] The beneficial effects of the present utility model are as follows:
[0021] For the hot water injection valve proposed by the present utility model, the drain pipe is arranged inside the connection corner of the inlet pipe and the outlet pipe, and the drain pipe communicates with the chamber between the first one-way valve and the second one-way valve to drain the water accumulated between the first one-way valve and the second one-way valve. By installing the drain pipe inside the connection corner of the inlet pipe and the outlet pipe, the distance between the water inlet chamber and the drainage chamber is shortened, the internal flow path and the overall structure of the hot water injection valve are optimized, thereby reducing the volume and occupied space of the hot water injection valve, improving the structural strength of the hot water injection valve, and being beneficial to extending the service life of the hot water injection valve. Description of the Drawings
[0022] Figure 1 It is a schematic structural diagram of the hot water injection valve provided by the embodiment of the present utility model;
[0023] Figure 2 It is a cross-sectional view of the hot water injection valve provided by an embodiment of the present utility model;
[0024] Figure 3 It is a schematic structural diagram of the pressure relief seat provided by an embodiment of the present utility model;
[0025] Figure 4 It is a schematic structural diagram of the drain valve core provided by an embodiment of the present utility model.
[0026] The names and labels of the components in the figure are as follows:
[0027] 1. Valve body; 10. Drainage channel; 11. Water inlet pipe; 111. Water inlet cavity; 112. Water inlet; 113. Pressure-bearing port; 12. Water outlet pipe; 121. Water outlet cavity; 122. Water outlet; 123. Circular pipe; 13. Drain pipe; 131. Main body pipe; 132. Pressure relief seat; 1321. Drainage port; 1322. Through hole; 1323. Pressure relief cavity; 13230. Ring groove; 1324. Release port; 14. Filter membrane; 21. First one-way valve; 22. Second one-way valve; 3. Drain valve core; 31. Sealing member; 32. Plug; 321. Rod portion; 322. Sealing gasket; 33. Elastic member; 4. Switch valve group; 41. Outer shell; 42. Moving iron core; 43. Sealing seat. Detailed implementation manners
[0028] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present utility model clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific implementation manners. It can be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the present utility model. In addition, it should be noted that, for the sake of convenience of description, only the parts related to the present utility model are shown in the drawings rather than all of them.
[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0031] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", "left", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operations, 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.
[0032] The technical solution of the present utility model will be further described below in conjunction with the drawings and through specific implementation manners.
[0033] This embodiment provides a hot water injection valve, which is mainly installed in the pipe of a hot water supply system to introduce the warm water of a hot water supply device into a bathtub. When the bathtub is set at a position higher than the hot water supply device, the hot water injection valve can prevent the sewage in the bathtub from flowing back into the tap water pipe.
[0034] As Figure 1 and Figure 2 shown, the hot water injection valve includes a valve body 1 and a switching valve group 4. The valve body 1 includes a water inlet pipe 11 and a water outlet pipe 12. The water inlet pipe 11 is used for introducing hot water. The water outlet pipe 12 intersects and communicates with the water inlet pipe 11 for leading out hot water. A first check valve 21 and a second check valve 22 are separately arranged in the water outlet pipe 12. The switching valve group 4 is arranged on the communication path between the water inlet pipe 11 and the water outlet pipe 12 for opening or closing the communication path. Specifically, the water inlet pipe 11 has a water inlet cavity 111 and a water inlet 112 communicating with the water inlet cavity 111. A filter membrane 14 is installed at a part of the water inlet cavity 111 close to the water inlet 112 to filter the water in the water inlet pipe 11. The water outlet pipe 12 has a water outlet cavity 121 and a water outlet 122 communicating with the water outlet cavity 121. The first check valve 21 and the second check valve 22 are installed at intervals in the water outlet cavity 121 to enable the water in the water outlet pipe 12 to flow unidirectionally towards the water outlet 122.
[0035] As Figure 2As shown, one end of the water outlet pipe 12 is integrally connected to one end of the water inlet pipe 11 far from the water inlet 112 at a right angle. The switching valve group 4 is installed on the communication path between the water outlet pipe 12 and the water inlet pipe 11. A circular pipe 123 is arranged along the extension direction (i.e., the axial direction) of the water outlet pipe 12 at the connection between the water outlet pipe 12 and the water inlet pipe 11. The water inlet pipe 11, the circular pipe 123 and the water outlet pipe 12 are communicated. The switching valve group 4 is located on the axis of the water outlet pipe 12 and can open or close the circular pipe 123.
[0036] The switching valve group 4 in this embodiment is a solenoid valve. When the solenoid valve is energized, it opens the circular pipe 123. When the solenoid valve is de-energized, it closes the circular pipe 123. The structure of the solenoid valve is simple and it is convenient for installation and maintenance. By controlling the solenoid valve, the automatic opening and closing of the circular pipe 123 is realized, thereby realizing the automatic opening and closing of the hot water injection valve.
[0037] Specifically, the switching valve group 4 includes a housing 41, a moving iron core 42 and a sealing seat 43. Among them, the housing 41 is fixedly installed on the communication path between the water outlet pipe 12 and the water inlet pipe 11 through fasteners such as bolts. The moving iron core 42 is movably arranged in the housing 41. The sealing seat 43 is hermetically installed on the inner wall at the intersection of the water outlet pipe 12 and the water inlet pipe 11 and blocks the opening of the circular pipe 123. An electromagnetic coil is installed in the housing 41. When the electromagnetic coil is de-energized, the moving iron core 42 extends out of the housing 41 and abuts against the sealing seat 43 to block the circular pipe 123, so as to isolate the water inlet pipe 11 and the water outlet pipe 12, thereby closing the hot water injection valve. When the electromagnetic coil is energized, the moving iron core 42 retracts into the housing 41, and the sealing seat 43 opens the circular pipe 123 under the action of the water pressure in the water inlet pipe 11, so that the water inlet pipe 11 and the water outlet pipe 12 are communicated, thereby opening the hot water injection valve. Since the solenoid valve is a prior art, the specific structure and working process of the solenoid valve will not be elaborated.
[0038] At present, the check valve in the water outlet pipe 12 is prone to wear during long-term use. When the water supply in the water inlet pipe 11 stops, the water at the water-using end is likely to flow back into the water inlet pipe 11, which may pollute the water source at the water supply end. In the existing hot water injection valves, the internal pipeline of the drain pipe is relatively complex and the length of the annular flow path is relatively long, resulting in a relatively large overall volume of the hot water injection valve, and there may be a situation where the strength is insufficient, which affects the service life of the hot water injection valve.
[0039] To solve the above problems, as Figure 2As shown, the hot water injection valve further includes a drain pipe 13. The drain pipe 13 is used to drain the water accumulated between the first check valve 21 and the second check valve 22. The drain pipe 13 is arranged inside the connection corner of the water inlet pipe 11 and the water outlet pipe 12, and the drain pipe 13 communicates with the chamber between the first check valve 21 and the second check valve 22. By installing the drain pipe 13 inside the connection corner of the water inlet pipe 11 and the water outlet pipe 12, the distance between the water inlet chamber 111 and the drain chamber is shortened, the internal flow path and the overall structure of the hot water injection valve are optimized, thereby reducing the volume and occupied space of the hot water injection valve, improving the structural strength of the hot water injection valve, and being beneficial to extending the service life of the hot water injection valve.
[0040] Specifically, a pressure-bearing port 113 communicating with the water inlet chamber 111 is provided in the water inlet pipe 11. The drain pipe 13 has a drain chamber and a drain port 1321. Both ends of the drain chamber communicate with the drain port 1321 and the pressure-bearing port 113 respectively, and the drain chamber also communicates with the water outlet chamber 121. A drain assembly is movably arranged in the drain pipe 13, and the drain assembly can open or close the drain port 1321. The drain assembly in this embodiment is a drain valve core 3. The drain valve core 3 is movably installed in the drain chamber. One end of the drain valve core 3 plugs the pressure-bearing port 113, and the other end of the drain valve core 3 closes the drain port 1321 when the water inlet pipe 11 is supplying water or opens the drain port 1321 when the water inlet pipe 11 stops supplying water.
[0041] When the water inlet pipe 11 is supplying water, the water pressure in the water inlet chamber 111 exerts a downward pressure on the drain valve core 3 through the pressure-bearing port 113, so that the drain valve core 3 plugs the drain port 1321, preventing the water in the water outlet chamber 121 from being discharged from the drain port 1321. When the water inlet pipe 11 stops supplying water, the water pressure in the water inlet chamber 111 is basically zero. After the water at the water-using end flows back into the drain chamber, the flowing-back water pushes the drain valve core 3 open to open the drain port 1321 and quickly discharge through the drain port 1321.
[0042] As Figure 2 shown, the water outlet pipe 12 is integrally connected to the drain pipe 13. A drain passage 10 is provided between the water outlet pipe 12 and the drain pipe 13. The chamber between the first check valve 21 and the second check valve 22 communicates with the inlet of the drain passage 10, and the outlet of the drain passage 10 communicates with the drain chamber. The water accumulated in the chamber between the first check valve 21 and the second check valve 22 enters the drain chamber through the drain passage 10 and then flows out from the drain port 1321. Since the water inlet pipe 11, the water outlet pipe 12 and the drain pipe 13 are integrally formed, the water inlet pipe 11 and the water outlet pipe 12 are orthogonally connected, and the drain pipe 13 is located at the right-angle bend of the water inlet pipe 11 and the water outlet pipe 12, so that the water inlet pipe 11, the water outlet pipe 12 and the drain pipe 13 form a right-angle support frame structure, improving the structural strength and installation stability of the hot water injection valve.
[0043] It should be noted that as Figure 2As shown, the drainage channel 10 is inclined downward from the inlet to the outlet, and the outlet of the drainage channel 10 is communicated with the bottom of the drainage cavity. The inlet of the drainage channel 10 in this embodiment is located in the water outlet cavity 121 between the first one-way valve 21 and the second one-way valve 22, so that the water flowing back to the water outlet pipe 12 flows directly into the bottom of the drainage cavity through the drainage channel 10.
[0044] Furthermore, the inclination angle of the drainage channel 10 in this embodiment is 20° to 70°. Specifically, the inclination angle of the drainage channel 10 can be 20°, 30°, 40°, 50°, 60° or 70°, etc. The drainage channel 10 can flexibly adjust the inclination angle according to its own axial length, as long as it is ensured that the outlet of the drainage channel 10 is communicated with the bottom of the drainage cavity.
[0045] As Figure 2 and Figure 3 As shown, the drain pipe 13 includes a main pipe 131 and a pressure relief seat 132. The main pipe 131 has a drainage cavity, and the main pipe 131 is integrally connected with the water inlet pipe 11. The pressure relief seat 132 is hermetically sleeved in the main pipe 131. A pressure relief cavity 1323 communicated with the drainage cavity is arranged in the pressure relief seat 132. The drainage cavity is communicated with the drainage channel 10. A release port 1324 coaxially communicated with the drain port 1321 is opened at the inner bottom of the pressure relief cavity 1323. The drain valve core 3 is movably installed in the pressure relief cavity 1323. The drain valve core 3 blocks the release port 1324 when the water inlet pipe 11 intakes water to close the drain port 1321; the drain valve core 3 opens the release port 1324 when the water inlet pipe 11 stops supplying water to open the drain port 1321. The drain pipe 13 is set as a split structure of the main pipe 131 and the pressure relief seat 132, so that the water inlet pipe 11, the water outlet pipe 12 and the main pipe 131 are integrally formed, which is convenient for the disassembly and replacement of the drain valve core 3. Two symmetrically arranged through holes 1322 are opened on the pressure relief seat 132, so that the drainage cavity is communicated with the pressure relief cavity 1323 through the two through holes 1322. The water flowing in through the drainage channel 10 flows through the drainage cavity, the through holes 1322 and the pressure relief cavity 1323 in sequence and then enters the release port 1324, and finally is discharged from the drain port 1321.
[0046] The release port 1324 and the drain port 1321 in this embodiment are coaxially arranged, that is, the water flow does not change direction during the process of flowing from the release port 1324 to the drain port 1321, so as to realize smooth drainage and avoid residual water in the drain pipe 13. Specifically, the aperture of the release port 1324 is smaller than the aperture of the drain port 1321, so that the opening area of the release port 1324 is smaller, which improves the blocking effect of the drain valve core 3 on the release port 1324 and avoids water leakage due to the too large aperture of the release port 1324 resulting in poor sealing.
[0047] As Figure 2 and Figure 4As shown in the figure, the drain valve core 3 includes a seal 31, a plug 32, and an elastic member 33. The circumferential edge of the seal 31 is clamped between the inner wall of the main pipe 131 and the top end of the pressure relief seat 132, and the seal 31 seals the pressure bearing port 113. The seal 31 is elastically supported at one end of the plug 32, and the other end of the plug 32 can block or open the release port 1324. One end of the elastic member 33 abuts against one end of the plug 32 close to the seal 31, and the other end of the elastic member 33 abuts against the inner bottom wall of the pressure relief chamber 1323. By sealing the pressure bearing port 113 with the seal 31, the water in the water inlet pipe 11 is prevented from directly entering the drain chamber. The elastic member 33 is compressively installed on the plug 32, so that the plug 32 always has a tendency to move upward to the initial position (the position where the release port 1324 is opened) to ensure that when the water inlet pipe 11 stops supplying water, the plug 32 is driven to move to the initial position, so that the plug 32 opens the release port 1324 when the water inlet pipe 11 stops supplying water.
[0048] In this embodiment, the seal 31 is a rubber bowl. The circumferential edge of the rubber bowl is clamped between the inner wall of the main pipe 131 and the top end of the pressure relief seat 132 to achieve good sealing of the pressure bearing port 113. The pressure-bearing area of the rubber bowl on the side facing the water inlet pipe 11 at the pressure bearing port 113 is larger than the pressure-bearing area of the rubber bowl on the side facing the drain pipe 13. When water enters the water inlet pipe 11, the rubber bowl is affected by the pressure difference and extends toward the drain pipe 13 and compresses the elastic member 33 to drive the plug 32 to block the release port 1324. After the water inlet pipe 11 stops supplying water, under the action of the restoring force of the elastic member 33, the rubber bowl contracts and drives the plug 32 to open the release port 1324.
[0049] In this embodiment, the elastic member 33 is a spring, and the structure of the spring is simple and convenient for installation. A ring groove 13230 is provided on the inner bottom wall of the pressure relief chamber 1323 around the circumference of the release port 1324. The spring is sleeved on the plug 32, and the other end of the spring abuts against the ring groove 13230. The ring groove 13230 plays a role in limiting the installation of the spring and improves the stability of the spring installation.
[0050] As Figure 4 shown in the figure, the plug 32 includes a rod portion 321 and a sealing gasket 322. The seal 31 elastically supports one end of the rod portion 321. The sealing gasket 322 is arranged at the other end of the rod portion 321, and the sealing gasket 322 can block or open the release port 1324. The sealing gasket 322 in this embodiment is a rubber gasket. When the plug 32 blocks the release port 1324, the sealing gasket 322 is pressed tightly at the release port 1324 to achieve sealing of the release port 1324. Specifically, a positioning groove is formed at the other end of the rod portion 321, and the sealing gasket 322 is snap-fitted and installed in the positioning groove, so that the sealing gasket 322 is stably installed on the rod portion 321. At the same time, when the sealing gasket 322 is worn or damaged, it is convenient to quickly replace the sealing gasket 322.
[0051] The above embodiments only illustrate the basic principles and characteristics of the present utility model. The present utility model is not limited by the above embodiments. Without departing from the spirit and scope of the present utility model, there are various changes and modifications to the present utility model, and these changes and modifications all fall within the scope of the present utility model claimed. The scope of protection claimed for the present utility model is defined by the appended claims and their equivalents.
Claims
1. Hot water injection valve, characterized in that: include: A water inlet pipe (11) for introducing hot water; A water outlet pipe (12) cross-connected with the water inlet pipe (11) for drawing out hot water, wherein a first one-way valve (21) and a second one-way valve (22) are separately arranged in the water outlet pipe (12); A switch valve group (4), arranged on the communication path between the water inlet pipe (11) and the water outlet pipe (12), and used for opening or closing the communication path; A drain pipe (13) is used to discharge water accumulated between the first one-way valve (21) and the second one-way valve (22); the drain pipe (13) is arranged on the inner side of the connection corner between the water inlet pipe (11) and the water outlet pipe (12); the drain pipe (13) is connected to the chamber between the first one-way valve (21) and the second one-way valve (22).
2. The hot water injection valve according to claim 1, characterized in that: The water outlet pipe (12) is integrally connected to the drain pipe (13); a drainage channel (10) is provided between the water outlet pipe (12) and the drain pipe (13); a chamber between the first one-way valve (21) and the second one-way valve (22) is communicated with the inlet of the drainage channel (10); a drainage cavity is provided in the drain pipe (13); and an outlet of the drainage channel (10) is communicated with the drainage cavity.
3. The hot water injection valve according to claim 2, characterized in that: The drainage channel (10) is arranged to be inclined downward from the inlet to the outlet, and the outlet of the drainage channel (10) is communicated with the bottom of the drainage cavity.
4. The hot water injection valve according to claim 3, characterized in that: The inclination angle of the drainage channel (10) is 20° to 70°.
5. The hot water injection valve according to claim 4, characterized in that: The inclination angle of the drainage channel (10) is 60°.
6. The hot water injection valve according to claim 1, characterized in that: A circular tube (123) is provided at the connection between the water outlet pipe (12) and the water inlet pipe (11) along the extension direction of the water outlet pipe (12); the water inlet pipe (11), the circular tube (123) and the water outlet pipe (12) are in communication; the switch valve group (4) is located on the axis of the water outlet pipe (12) and is capable of opening or closing the circular tube (123).
7. The hot water injection valve according to claim 6, characterized in that: The switch valve group (4) is a solenoid valve, which opens the circular tube (123) when the solenoid valve is powered on, and closes the circular tube (123) when the solenoid valve is powered off.
8. The hot water injection valve according to claim 7, characterized in that: The switch valve group (4) comprises a housing (41), a moving iron core (42) and a sealing seat (43); the housing (41) is fixedly installed on the communication path between the water inlet pipe (11) and the water outlet pipe (12) along the axial direction of the water outlet pipe (12); the moving iron core (42) is movably arranged in the housing (41) to drive the sealing seat (43) to open or close the circular pipe (123).
9. The hot water injection valve according to any one of claims 1 to 8, characterized in that: The drain pipe (13) has a drain port (1321), and a drain component is movably arranged in the drain pipe (13), and the drain component can open or close the drain port (1321).
10. The hot water injection valve according to any one of claims 1 to 8, characterized in that: The water outlet pipe (12) is orthogonally connected to the water inlet pipe (11), and the drainage pipe (13) is located inside the right-angled corner between the water inlet pipe (11) and the water outlet pipe (12).