Hot water injection valve

Abstract

The utility model relates to the technical field of hot water injection valves, in particular to a hot water injection valve. The hot water injection valve comprises a water inlet pipe, a water outlet pipe, a switch valve set, a drainage valve seat and a drainage valve element. A first one-way valve and a second one-way valve are arranged in the water outlet pipe in a separated mode. The switch valve group is arranged on a communication path of the water inlet pipe and the water outlet pipe. The drainage valve seat is provided with a pressure measuring channel, a diaphragm chamber and a drainage cavity, the pressure measuring channel is obliquely arranged relative to the axial direction of the water inlet pipe, the communication path is communicated with the diaphragm chamber through the pressure measuring channel, and a cavity between the first one-way valve and the second one-way valve is communicated with the drainage cavity. The drainage valve element is movably arranged in the drainage cavity and blocks the diaphragm chamber, and when water enters the water inlet pipe, the drainage valve element closes the drainage cavity; when the water inlet pipe cuts off water, the drainage valve element opens the drainage cavity to drain water accumulated between the first one-way valve and the second one-way valve. The structure of the hot water injection valve is simplified, and the hot water injection valve is convenient to install and use.

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] Usually, a hot water injection valve is installed in the pipe that supplies hot water or warm water to the water-using end from the hot water supply device. Two one-way valves are arranged at intervals in the outlet pipe of the hot water injection valve. The hot water enters the hot water injection valve after passing through the pipe, and then flows from the outlet of the outlet pipe to the water-using end after passing through the two one-way valves.

[0003] In the existing hot water injection valve, the one-way valve in the water outlet pipe is prone to wear after long-term use. After the water inlet pipe stops supplying water, the water at the water end is prone to backflow, causing the water source at the hot water supply end to be polluted. Therefore, a flow sensor and a drain pipe are usually installed in the hot water injection valve. The water outlet pipe is connected to the drain pipe in the chamber between the two one-way valves. A drain valve core that can be opened and closed is installed in the drain pipe. When the flow sensor detects that the water in the water outlet pipe flows back, the drain valve core opens the drain pipe to discharge the water accumulated in the cavity between the two one-way valves through the drain pipe. The existing hot water injection valve has a complex structure, a large number of parts, and a large overall volume, which affects the installation and use of the hot water injection valve. Utility Model Content

[0004] The utility model aims to provide a hot water injection valve to solve the technical problems of the hot water injection valve in the prior art, such as complex structure, large volume and inconvenient installation and use.

[0005] To achieve this purpose, the technical solution adopted by the utility model is:

[0006] The hot water injection valve comprises a water inlet pipe, a water outlet pipe, a switch valve group, a drain valve seat and a drain valve core, wherein the water inlet pipe is used to introduce hot water; the water outlet pipe is cross-connected with the water inlet pipe to lead out hot water, and a first one-way valve and a second one-way valve are separately arranged in the water outlet pipe; the switch valve group is arranged on the communication path between the water inlet pipe and the water outlet pipe, and is used to open or cut off the communication path;

[0007] The drain valve seat is provided with a pressure measuring channel, a diaphragm chamber and a drain cavity, the pressure measuring channel is arranged to be inclined relative to the axial direction of the water inlet pipe, the communication path is communicated with the diaphragm chamber through the pressure measuring channel, and the cavity between the first one-way valve and the second one-way valve is communicated with the drain cavity;

[0008] The drain valve core is movably arranged in the drain cavity and blocks the diaphragm chamber. When water flows into the water inlet pipe, the drain valve core closes the drain cavity; when water stops flowing into the water inlet pipe, the drain valve core opens the drain cavity to discharge water accumulated between the first one-way valve and the second one-way valve.

[0009] As an optional solution for the hot water injection valve, the pressure measuring channel is arranged obliquely upward along the height direction of the drain valve seat.

[0010] As an optional solution for the hot water injection valve, the inclination angle of the pressure measuring channel relative to the axial direction of the water inlet pipe is 30° to 60°.

[0011] As an optional solution for the hot water injection valve, the pressure measuring channel includes a first channel and a second channel, the communicating path, the first channel, the second channel and the diaphragm chamber are sequentially connected, and the diameter of the first channel is smaller than the diameter of the second channel.

[0012] As an optional solution for the hot water injection valve, a circular tube is provided at the connection between the water outlet pipe and the water inlet pipe along the extension direction of the water outlet pipe, the circumferential outer side of the circular tube forms an annular space in the connecting path, the pressure measuring channel is connected to the annular space, the water inlet pipe, the annular space, the circular tube and the water outlet pipe are connected in sequence; the switch valve group is coaxially arranged with the circular tube to open or close the circular tube.

[0013] As an optional solution for the hot water injection valve, the circular tube is eccentrically arranged toward a side away from the water inlet pipe so that the switch valve group is close to the pressure measuring channel.

[0014] As an optional solution for the hot water injection valve, the drain valve seat includes:

[0015] A drain valve body, wherein the drain valve body, the water inlet pipe and the water outlet pipe are integrally formed, and the pressure measuring channel and the drain cavity are provided in the drain valve body;

[0016] A valve cover is sealingly mounted on the drain valve body, the diaphragm chamber and the pressure channel are opened in the valve cover, and the pressure measuring channel, the pressure channel and the diaphragm chamber are connected in sequence.

[0017] As an optional solution for the hot water injection valve, the water outlet pipe is orthogonally connected to the water inlet pipe, and the drain valve body is located beside the water outlet pipe.

[0018] As an optional solution for the hot water injection valve, the drain valve core includes a main valve core and an elastic member, and the main valve core is movably installed in the drain cavity through the elastic member and blocks the diaphragm chamber; when water flows into the water inlet pipe, the main valve core compresses the elastic member and closes the drain cavity; when water stops flowing into the water inlet pipe, the main valve core opens the drain cavity driven by the elastic member.

[0019] As an optional solution for the hot water injection valve, the main valve core includes:

[0020] A pressure pad, which is axially telescopically disposed in the drainage cavity and blocks the diaphragm chamber;

[0021] The plug is connected to the pressure pad; when water flows into the water inlet pipe, the pressure pad extends toward the drainage cavity to drive the plug to seal and close the drainage cavity; when water flows into the water inlet pipe, the plug compresses the pressure pad and opens the drainage cavity under the drive of the elastic member.

[0022] The beneficial effects of the utility model are:

[0023] The hot water injection valve proposed in the utility model includes a water inlet pipe, a water outlet pipe, a switch valve group, a drain valve seat and a drain valve core. The drain valve seat is provided with a pressure measuring channel, a diaphragm chamber and a drain cavity. The pressure measuring channel is arranged to be inclined relative to the axial direction of the water inlet pipe. The communication path is connected to the diaphragm chamber through the pressure measuring channel. The cavity between the first check valve and the second check valve is connected to the drain cavity. The drain valve core is movably arranged in the drain cavity and blocks the diaphragm chamber. When the water inlet pipe is filled with water, the drain valve core closes the drain cavity; when the water inlet pipe is cut off, the drain valve core opens the drain cavity to discharge the water accumulated between the first check valve and the second check valve. The water accumulated between the first check valve and the second check valve is discharged through the drain valve seat and the drain valve core. There is no need to install a flow sensor in the hot water injection valve, which simplifies the structure of the hot water injection valve, reduces the volume and occupied area of ​​the hot water injection valve, and realizes flexible installation and use of the hot water injection valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of a hot water injection valve provided by an embodiment of the utility model;

[0025] Figure 2 It is a cross-sectional view of a hot water injection valve provided in an embodiment of the utility model.

[0026] The names and numbers of the components in the figure are as follows:

[0027] 1. Water inlet pipe; 2. Water outlet pipe; 3. Switch valve group; 31. Solenoid valve; 32. Gland assembly; 4. Drain valve seat; 41. Drain valve body; 411. Pressure measuring channel; 4111. First channel; 4112. Second channel; 412. Drain cavity; 413. Drain port; 414. Ring groove; 415. Sealing groove; 42. Valve cover; 421. Diaphragm chamber; 422. Pressure channel; 5. Drain valve core; 51. Main valve core; 511. Pressure pad; 512. Plug; 52. Elastic member; 6. First one-way valve; 7. Second one-way valve; 8. Round pipe; 80. Annular space; 9. Sealing ring. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0033] like Figure 1 and Figure 2As shown, this embodiment proposes a hot water injection valve, which is mainly installed in the piping of the hot water supply device to supply hot water or warm water to the water-using end, so as to introduce the warm water of the hot water supply device into the bathtub. When the bathtub is set at a higher position 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. The hot water injection valve includes an inlet pipe 1, an outlet pipe 2 and a switch valve group 3, and the inlet pipe 1 is used to introduce hot water. The outlet pipe 2 is cross-connected with the inlet pipe 1 for leading out hot water, and the outlet pipe 2 is separated by a first one-way valve 6 and a second one-way valve 7. The switch valve group 3 is arranged on the communication path between the inlet pipe 1 and the outlet pipe 2, and is used to open or cut off the communication path.

[0034] Specifically, one end of the water inlet pipe 1 is integrally connected to one end of the water outlet pipe 2 at a right angle, so that the water outlet pipe 2 is orthogonally connected to the water inlet pipe 1. The end of the water inlet pipe 1 away from the water outlet pipe 2 has a water inlet, and a filter membrane is installed in the water inlet to filter the water entering the water inlet pipe 1. The end of the water outlet pipe 2 away from the water inlet pipe 1 has a water outlet, and the first one-way valve 6 is arranged at the end of the water outlet pipe 2 close to the water inlet pipe 1, and the second one-way valve 7 is arranged below the first one-way valve 6 at intervals. By installing two one-way valves in the water outlet pipe 2, the water in the water outlet pipe 2 always keeps a one-way flow toward the water outlet to avoid backflow.

[0035] like Figure 2 As shown, a circular tube 8 is provided at the connection between the outlet pipe 2 and the inlet pipe 1 along the extension direction of the outlet pipe 2, and an annular space 80 is formed on the outer side of the circular tube 8 in the circumferential direction in the communication path, that is, an annular space 80 is provided at the connection between the outlet pipe 2 and the inlet pipe 1, and the inlet pipe 1, the annular space 80, the circular tube 8 and the outlet pipe 2 are sequentially connected. The switch valve group 3 is coaxially arranged with the circular tube 8 to open or close the circular tube 8. Since the circular tube 8 is eccentrically arranged relative to the axial direction of the outlet pipe 2, and the switch valve group 3 is coaxially arranged with the circular tube 8, the switch valve group 3 is eccentrically arranged relative to the axial direction of the outlet pipe 2, and the switch valve group 3 does not need to be coaxially arranged with the outlet pipe 2, so that the flexible arrangement of the switch valve group 3 is achieved.

[0036] In this embodiment, the switch valve group 3 includes a solenoid valve 31 and a gland assembly 32. The solenoid valve 31 includes a housing and a moving iron core. The housing is fixedly installed on the communication path between the water inlet pipe 1 and the water outlet pipe 2 by fasteners such as bolts. The moving iron core is movably arranged in the housing. The gland assembly 32 is sealed and installed in the communication path and blocks the opening of the round tube 8. An electromagnetic coil is installed in the housing of this embodiment. When the electromagnetic coil is energized, the moving iron core can be retracted into the housing. The gland assembly 32 moves toward the housing under the action of the water pressure in the water inlet pipe 1 and opens the opening of the round tube 8, so that the water inlet pipe 1 is connected with the round tube 8 and the water outlet pipe 2 in sequence through the annular space 80. When the electromagnetic coil is de-energized, the moving iron core extends out of the housing and presses the gland assembly 32 against the opening of the round tube 8, thereby isolating the water inlet pipe 1 from the water outlet pipe 2.

[0037] Specifically, the gland assembly 32 has an elastic pad and a pressure head. The circumferential edge of the elastic pad is installed on the valve seat portion of the housing installed on the communication path. The pressure head moves with the elastic pad, so that the moving iron core can press against or release the pressure head. The elastic pad can be a rubber pad or a pad made of other elastic materials. The solenoid valve 31 is a prior art, and the specific structure and working process of the solenoid valve 31 are not described in detail.

[0038] In the existing hot water injection valve, the one-way valve in the water outlet pipe is prone to wear after long-term use. After the water inlet pipe stops supplying water, the water at the water end is prone to backflow, causing the water source at the hot water supply end to be polluted. Therefore, a flow sensor and a drain pipe are usually installed in the hot water injection valve. The water outlet pipe is connected to the drain pipe in the chamber between the two one-way valves. A drain valve core that can be opened and closed is installed in the drain pipe. When the flow sensor detects that the water in the water outlet pipe flows back, the drain valve core opens the drain pipe to discharge the water accumulated in the cavity between the two one-way valves through the drain pipe. The existing hot water injection valve has a complex structure, a large number of parts, and a large overall volume, which affects the installation and use of the hot water injection valve.

[0039] To solve the above problems, Figure 2 As shown, the hot water injection valve further includes a drain valve seat 4 and a drain valve core 5. The drain valve seat 4 is provided with a pressure measuring channel 411, a diaphragm chamber 421 and a drain cavity 412. The pressure measuring channel 411 is arranged to be inclined relative to the axial direction of the water inlet pipe 1. The communication path is connected to the diaphragm chamber 421 through the pressure measuring channel 411. The cavity between the first check valve 6 and the second check valve 7 is connected to the drain cavity 412. The drain valve core 5 is movably arranged in the drain cavity 412 and blocks the diaphragm chamber 421. When the water inlet pipe 1 is flowing, the drain valve core 5 closes the drain cavity 412; when the water inlet pipe 1 is not flowing, the drain valve core 5 opens the drain cavity 412 to discharge the water accumulated between the first check valve 6 and the second check valve 7. The water accumulated between the first check valve 6 and the second check valve 7 is discharged through the drain valve seat 4 and the drain valve core 5. There is no need to install a flow sensor in the hot water injection valve, which simplifies the structure of the hot water injection valve, reduces the volume and occupied area of ​​the hot water injection valve, and realizes flexible installation and use of the hot water injection valve.

[0040] Specifically, Figure 1 and Figure 2As shown, the drain valve seat 4 includes a drain valve body 41 and a valve cover 42. The drain valve body 41, the water inlet pipe 1 and the water outlet pipe 2 are integrally formed. A pressure measuring channel 411 and a drain cavity 412 are provided in the drain valve body 41. The valve cover 42 is sealed and installed on the drain valve body 41. A diaphragm chamber 421 and a pressure channel 422 are provided in the valve cover 42. The pressure measuring channel 411, the pressure channel 422 and the diaphragm chamber 421 are connected in sequence. By setting the drain valve seat 4 as a split structure, it is convenient to install the drain valve core 5, and the processing difficulty of the pressure measuring channel 411, the diaphragm chamber 421 and the drain cavity 412 is reduced. At the same time, the drain valve body 41, the valve seat part where the solenoid valve 31 is installed on the communication path, the water inlet pipe 1 and the water outlet pipe 2 are integrally formed, which improves the processing efficiency of the hot water injection valve.

[0041] like Figure 2 As shown, a sealing groove 415 is provided on the drain valve body 41 around the pressure measuring channel 411, and a sealing ring 9 is installed in the sealing groove 415, so that when the valve cover 42 is installed on the drain valve body 41, the pressure measuring channel 411 and the pressure channel 422 maintain sealed communication to avoid water leakage.

[0042] It should be noted that the drain valve body 41 is located beside the water outlet pipe 2, specifically, the drain valve body 41 is located at the non-right angle corner between the water inlet pipe 1 and the water outlet pipe 2. The drain valve body 41 is arranged opposite to the water outlet pipe 2 and is located on the left and right sides of the water outlet pipe 2. The circular tube 8 is eccentrically arranged toward the side away from the water inlet pipe 1 so that the switch valve group 3 is close to the pressure measuring channel 411. Specifically, the shell of the solenoid valve 31 is located on the water outlet pipe 2, and the shell is eccentrically arranged relative to the axial direction of the water outlet pipe 2, so that the valve seat part of the shell installed on the communication path is closer to the drain valve body 41, so as to shorten the distance between the valve seat part of the shell installed and the drain valve body 41, so that the structure of the hot water injection valve is more compact and the volume is smaller.

[0043] like Figure 2 As shown, the drain valve core 5 includes a main valve core 51 and an elastic member 52. The main valve core 51 is movably installed in the drain cavity 412 through the elastic member 52 and blocks the diaphragm chamber 421. When water enters the water inlet pipe 1, the main valve core 51 compresses the elastic member 52 and closes the drain cavity 412. When water is cut off from the water inlet pipe 1, the main valve core 51 opens the drain cavity 412 under the drive of the elastic member 52. Specifically, the drain valve body 41 has a drain port 413 parallel to the axial direction of the water outlet pipe 2. When the main valve core 51 opens the drain cavity 412, the drain cavity 412 is connected with the drain port 413, and the water accumulated between the first check valve 6 and the second check valve 7 enters the drain cavity 412 and is discharged from the drain port 413. When the main valve core 51 closes the drain cavity 412, the drain cavity 412 is disconnected from the drain port 413 to keep the drain cavity 412 closed.

[0044] Specifically, the pressure measuring channel 411 is connected with the annular space 80. When water enters the water inlet pipe 1, part of the water passes through the annular space 80 and the pressure measuring channel 411 in sequence and enters the diaphragm chamber 421, and the other part of the water enters the water outlet pipe 2 through the circular tube 8 and is discharged. The small part of the water entering the water outlet pipe 2 fills the drainage chamber 412, so that the main valve core 51 is subjected to water pressure on both the diaphragm chamber 421 side and the drainage chamber 412 side, and the water pressure of the main valve core 51 on the diaphragm chamber 421 side is greater than the water pressure on the drainage chamber 412 side. Under the action of the pressure difference, the main valve core 51 compresses the elastic member 52 and closes the drainage chamber 412. When the water inlet pipe 1 stops, the main valve core 51 is no longer affected by the pressure difference, and the main valve core 51 opens the drainage chamber 412 under the action of the restoring force of the elastic member 52.

[0045] In this embodiment, an annular groove 414 is provided in the drain valve body 41, and the elastic member 52 is a spring, which has a simple structure and is easy to install. The spring is compressed and installed in the annular groove 414, and one end of the spring abuts against the inner bottom wall of the annular groove 414, and the other end of the spring abuts against the main valve core 51, so that the main valve core 51 always has a movement tendency to open the drain cavity 412, so as to ensure that the main valve core 51 opens the drain cavity 412 when the water inlet pipe 1 stops flowing.

[0046] Specifically, the main valve core 51 includes a pressure pad 511 and a plug 512. The pressure pad 511 is axially retractable and arranged in the drainage cavity 412 to block the diaphragm chamber 421. The plug 512 is connected to the pressure pad 511. When water flows into the water inlet pipe 1, the pressure pad 511 stretches toward the drainage cavity 412 to drive the plug 512 to block and close the drainage cavity 412. When water flows into the water inlet pipe 1, the plug 512 compresses the pressure pad 511 and opens the drainage cavity 412 under the drive of the elastic member 52. The pressure pad 511 of this embodiment is a rubber bowl, and the circumferential edge of the rubber bowl is tightly installed between the drainage valve body 41 and the valve cover 42 to achieve a good seal of the diaphragm chamber 421. The top end of the plug 512 is sleeved in the rubber bowl. When water flows into the water inlet pipe 1, the rubber bowl protrudes downward under the action of the pressure difference so that the plug 512 blocks the drainage cavity 412. When the water inlet pipe 1 stops flowing, the rubber bowl drives the plug 512 to return to the initial position under the action of the restoring force of the elastic member 52 and opens the drainage cavity 412 .

[0047] It should be noted that the pressure area of ​​the pressure pad 511 in the diaphragm chamber 421 is larger than the pressure area of ​​the pressure pad 511 in the drainage chamber 412, so that when water enters the water inlet pipe 1, there is a pressure difference between the diaphragm chamber 421 and the drainage chamber 412 of the pressure pad 511, so as to ensure that the plug 512 stably blocks the drainage chamber 412 and avoids water leakage in the drainage chamber 412 when the hot water injection valve normally delivers hot water.

[0048] like Figure 2As shown, the pressure measuring channel 411 is arranged obliquely upward along the height direction (up and down direction in the figure) of the drain valve seat 4. Through the above arrangement, the pressure measuring channel 411 can be away from the annular groove 414 and the drain cavity 412 in the drain valve body 41, which can not only avoid the interference between the pressure measuring channel 411 and the annular groove 414 or the drain cavity 412, but also ensure the installation of the sealing ring 9 and the pressure pad 511, and realize the reasonable distribution of the pressure measuring channel 411, the sealing groove 415, the annular groove 414 and the drain cavity 412 in the drain valve body 41.

[0049] Furthermore, the inclination angle of the pressure measuring channel 411 relative to the axial direction of the water inlet pipe 1 is 30° to 60°. The inclination angle of the pressure measuring channel 411 of this embodiment can be 30°, 40°, 50° or 60°, etc. When the inclination angle of the pressure measuring channel 411 is less than 30°, the distance between the pressure measuring channel 411 and the annular groove 414 and the drainage cavity 412 in the drain valve body 41 is relatively close, which is not conducive to the arrangement of the sealing groove 415. When the inclination angle of the pressure measuring channel 411 is greater than 60°, the height of the pressure measuring channel 411 in the up and down direction is relatively large, which increases the volume of the drain valve body 41, thereby increasing the difficulty of installing the hot water injection valve.

[0050] like Figure 2 As shown, the pressure measuring channel 411 includes a first channel 4111 and a second channel 4112, and the communication path, the first channel 4111, the second channel 4112 are sequentially connected to the diaphragm chamber 421, and the diameter of the first channel 4111 is smaller than the diameter of the second channel 4112. By setting the pressure measuring channel 411 as a stepped channel structure, the water flow pressure in the first channel 4111 is increased to accelerate the flow rate into the second channel 4112, so as to achieve rapid water inflow into the pressure measuring channel 411, so that the diaphragm chamber 421 is filled with water as soon as possible, so as to ensure that when the water inlet pipe 1 is normally inflowing, the drainage valve core 5 can quickly close the drainage chamber 412 under the action of the pressure difference, so as to prevent the water in the water outlet pipe 2 from leaking from the drainage chamber 412, and realize the normal use of the hot water injection valve.

[0051] It should be noted that the first channel 4111 and the second channel 4112 are both circular channels, and the diameters of the first channel 4111 and the second channel 4112 can be determined according to requirements and are not specifically limited herein.

[0052] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Hot water injection valve, characterized in that: The utility model comprises a water inlet pipe (1), a water outlet pipe (2), a switch valve group (3), a drain valve seat (4) and a drain valve core (5); the water inlet pipe (1) is used for introducing hot water; the water outlet pipe (2) is cross-connected with the water inlet pipe (1) for leading out hot water; a first one-way valve (6) and a second one-way valve (7) are separately arranged in the water outlet pipe (2); the switch valve group (3) is arranged on the communication path between the water inlet pipe (1) and the water outlet pipe (2) and is used for opening or closing the communication path; The drain valve seat (4) is provided with a pressure measuring channel (411), a diaphragm chamber (421) and a drain cavity (412); the pressure measuring channel (411) is arranged to be inclined relative to the axial direction of the water inlet pipe (1); the communication path is connected to the diaphragm chamber (421) through the pressure measuring channel (411); and the cavity between the first one-way valve (6) and the second one-way valve (7) is connected to the drain cavity (412); The drain valve core (5) is movably arranged in the drain cavity (412) and blocks the diaphragm chamber (421); when water flows into the water inlet pipe (1), the drain valve core (5) closes the drain cavity (412); when water flows out of the water inlet pipe (1), the drain valve core (5) opens the drain cavity (412) to discharge water accumulated between the first one-way valve (6) and the second one-way valve (7).

2. The hot water injection valve according to claim 1, characterized in that: The pressure measuring channel (411) is arranged obliquely upward along the height direction of the drain valve seat (4).

3. The hot water injection valve according to claim 2, characterized in that: The inclination angle of the pressure measuring channel (411) relative to the axial direction of the water inlet pipe (1) is 30° to 60°.

4. The hot water injection valve according to claim 1, characterized in that: The pressure measuring channel (411) comprises a first channel (4111) and a second channel (4112); the connecting path, the first channel (4111), and the second channel (4112) are connected to the diaphragm chamber (421) in sequence, and the diameter of the first channel (4111) is smaller than the diameter of the second channel (4112).

5. The hot water injection valve according to claim 1, characterized in that: A circular tube (8) is provided at the connection between the water outlet pipe (2) and the water inlet pipe (1) along the extension direction of the water outlet pipe (2); the outer side of the circular tube (8) in the circumferential direction forms an annular space (80) in the communication path; the pressure measuring channel (411) is connected to the annular space (80); the water inlet pipe (1), the annular space (80), the circular tube (8) and the water outlet pipe (2) are connected in sequence; the switch valve group (3) is coaxially arranged with the circular tube (8) to open or close the circular tube (8).

6. The hot water injection valve according to claim 5, characterized in that: The circular tube (8) is eccentrically arranged toward a side away from the water inlet pipe (1), so that the switch valve group (3) is close to the pressure measuring channel (411).

7. The hot water injection valve according to any one of claims 1 to 6, characterized in that: The drain valve seat (4) comprises: A drainage valve body (41), wherein the drainage valve body (41), the water inlet pipe (1) and the water outlet pipe (2) are integrally formed, and the drainage valve body (41) is provided with the pressure measuring channel (411) and the drainage cavity (412); A valve cover (42), the valve cover (42) is sealingly mounted on the drain valve body (41), the valve cover (42) is provided with the diaphragm chamber (421) and the pressure channel (422), and the pressure measuring channel (411) and the pressure channel (422) are sequentially connected to the diaphragm chamber (421).

8. The hot water injection valve according to claim 7, characterized in that: The water outlet pipe (2) is orthogonally connected to the water inlet pipe (1), and the water discharge valve body (41) is located beside the water outlet pipe (2).

9. The hot water injection valve according to any one of claims 1 to 6, characterized in that: The drain valve core (5) comprises a main valve core (51) and an elastic member (52); the main valve core (51) is movably installed in the drain cavity (412) through the elastic member (52) and blocks the diaphragm chamber (421); when water flows into the water inlet pipe (1), the main valve core (51) compresses the elastic member (52) and closes the drain cavity (412); when water stops flowing into the water inlet pipe (1), the main valve core (51) opens the drain cavity (412) under the drive of the elastic member (52).

10. The hot water injection valve according to claim 9, characterized in that: The main valve core (51) comprises: A pressure pad (511), the pressure pad (511) is axially telescopically disposed in the drainage cavity (412) and blocks the diaphragm chamber (421); A plug (512), the plug (512) being connected to the pressure pad (511); when water flows into the water inlet pipe (1), the pressure pad (511) extends toward the drainage cavity (412) to drive the plug (512) to seal and close the drainage cavity (412); when water flows out of the water inlet pipe (1), the plug (512) compresses the pressure pad (511) and opens the drainage cavity (412) under the drive of the elastic member (52).

Images