Drainage structure

Abstract

The intake valve (10) comprises a valve seat (1) having an intake passage (11) and an intake chamber (12) communicating with the intake passage (11), the valve seat (1) having a valve port (121) at one end of the valve seat (1) remote from the intake passage (11), and a valve core (2) that is vertically movably mounted within the valve seat (1) and seals or opens the intake passage (11), the valve core (2) having a cylindrical structure. and a valve core (2) having a communicating cut surface (21) on its circumferential surface, which forms a flow passage (3) between the communicating cut surface (21) and a side wall of an intake chamber (12), and when the valve core (2) opens the intake passage (11), the gas in the intake passage (11) passes through the flow passage (3) and flows out of a valve port (121) from one end of the intake chamber (12) remote from the intake passage (11). This intake valve solves the problem of low drainage efficiency of drain valves in the prior art.

Description

[Technical field]

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of the People's Republic of China on September 1, 2022, bearing application number 202222321099.8 and titled "Drainage Structure", priority to a patent application filed with the State Intellectual Property Office of the People's Republic of China on July 20, 2022, bearing application number 202221880476.5 and titled "Intake Valve", and priority to a patent application filed with the State Intellectual Property Office of the People's Republic of China on July 29, 2022, bearing application number 202222028283.3 and titled "Anti-freeze Valve".

[0002] FIELD OF THE DISCLOSURE This application relates to the field of drain valves, and in particular to drainage structures. [Background technology]

[0003] When the outside air temperature is relatively low, the residual water in the pipeline system needs to be discharged through the drain valve to avoid the residual water freezing in the pipeline system and causing damage to the pipeline or other equipment.

[0004] However, conventional drain valves are not provided with an air intake structure, and when negative pressure occurs in the pipeline system, it is difficult for the drain valve to completely drain the remaining water. Summary of the Invention

[0005] A main object of the present application is to provide a drainage structure to solve the problem of low drainage efficiency of drain valves in the prior art.

[0006] The present application provides a drainage structure including a connector including a main pipeline and a drain pipeline that are connected and communicate with each other, an intake valve provided in the main pipeline, having an openable and closable valve port, and when the valve port is open, communicating between the valve port and the main pipeline, and a drainage valve provided in the drain pipeline, having an openable and closable drain port, and when the drain port is open, communicating between the drain port and the drain pipeline.

[0007] Furthermore, the intake valve includes a valve seat having an intake chamber therein, both ends of which are a valve port and an exhaust port, respectively, and a valve core that is arranged to be able to float up and down within the intake chamber and seals or opens the valve port, a communication groove facing the exhaust port is provided at one end of the valve core away from the valve port, and a flow passage exists between the valve core and a side wall of the intake chamber, so that the valve port, the flow passage, the communication groove and the exhaust port can be sequentially communicated with each other.

[0008] Furthermore, the communication groove is provided in the valve body, and there are a plurality of communication grooves, which are provided at intervals from one another.

[0009] Furthermore, the communication groove is provided in the valve body, and there are a plurality of communication grooves, which communicate with each other.

[0010] Furthermore, a plurality of communication grooves are provided at the bottom of the valve core, and a plurality of flow passages are provided between the valve core and the inner wall of the intake chamber, and the communication grooves communicate with the flow passages in one-to-one correspondence.

[0011] Furthermore, the circumferential wall surface of the valve core has a plurality of communicating cut surfaces provided at intervals, and the gap between the communicating cut surfaces and the inner wall of the intake chamber forms a flow passage.

[0012] Furthermore, the valve core has a cylindrical structure, the communicating cut surface is a plane, and the intersection line between the communicating cut surface and the circular end surface of the valve core is a tangent to the circular end surface of the valve core.

[0013] Furthermore, one end of each communication groove is used to communicate with a corresponding flow passage, and the other ends of each communication groove communicate with each other.

[0014] Furthermore, each of the communication grooves is provided perpendicular to the communication cut surface, and / or each of the communication grooves has an equal extending length.

[0015] Furthermore, a communication groove is provided on the communication cut surface, one end of the communication groove communicates with the valve port, and the other end of the communication groove communicates with the communication groove.

[0016] Further, the valve seat is provided with a blocking portion, the blocking portion being provided at the exhaust port of the valve seat, the blocking portion restricting the valve core within the intake chamber.

[0017] Furthermore, the blocking portion is bendable, and before being bent, the blocking portion is cylindrical and extends along the axis of the intake chamber, the inner diameter of the blocking portion is larger than the inner diameter of the intake chamber, and a step is formed between the inner wall of the blocking portion and the inner wall of the intake chamber, and after being bent, the blocking portion is fastened and engaged with the bottom of the valve core, or the end of the valve core remote from the exhaust port has a chamfered portion that abuts against the blocking portion.

[0018] Furthermore, the valve seat includes a first valve seat body having a valve port and an intake passage communicating with the valve port, and a second valve seat body connected to the first valve seat body and having at least a portion of the intake chamber provided therein, a mounting groove is provided between the first valve seat body and the second valve seat body, and a first sealing member is provided in the mounting groove.

[0019] Further, the valve core is made of a non-metallic material, or there are a plurality of intake passages, each of which communicates with the valve port, and each of which has an intake port at one end remote from the intake chamber.

[0020] Further, the valve core includes a valve head that is movably provided to seal or open the valve port, and a valve body that is located in the intake chamber, connected to the valve head, and has a second mounting groove between the valve head and the valve body, and a second sealing member is provided in the second mounting groove.

[0021] Furthermore, the drain valve includes an anti-freeze valve core, a thermostat, and an anti-freeze valve seat connected to the drain pipe, the drain port is provided at one end of the anti-freeze valve seat, one end of the thermostat is fastened and engaged with the anti-freeze valve core, and both the thermostat and the anti-freeze valve core are movably provided within the anti-freeze valve seat to seal or open the drain port.

[0022] Further, the anti-freeze valve seat has a valve chamber, the valve chamber is connected to the drain port, the drain valve further includes a first elastic member and a guide sleeve, the thermostat is movably arranged in the valve chamber, one end of the thermostat is engaged with the anti-freeze valve core, the first elastic member is fitted to the thermostat, the guide sleeve is fitted to the thermostat and the first elastic member, the guide sleeve extends along the extension direction of the valve chamber, at least a portion of the guide sleeve is in close contact with the inner wall of the valve chamber, one end of the guide sleeve close to the drain port abuts the thermostat, and one end of the first elastic member close to the drain port abuts the thermostat or the guide sleeve.

[0023] The thermostat further includes a main body and a first positioning flange connected to each other, the first positioning flange protruding from the main body, and one end of the guide sleeve close to the drain port abuts against the first positioning flange.

[0024] Further, the guide sleeve includes a cylindrical body and a bottom cover connected to each other, the cylindrical body and the main body portion are spaced apart, and the bottom cover is provided with a mounting hole that fits the main body portion, and the mounting hole is fitted to the main body portion so that the bottom cover abuts against the first positioning flange.

[0025] Further, the cylinder has a first guide segment and a second guide segment connected to each other, the second guide segment is connected to the bottom cover, the first guide segment is in close contact with the inner wall of the valve chamber, and the second guide segment is spaced apart from the inner wall of the valve chamber.

[0026] Furthermore, a second positioning flange is formed between the first guide segment and the second guide segment, and the first elastic member abuts against the second positioning flange.

[0027] Furthermore, a guide surface is provided at one end of the first guide segment remote from the drain outlet, and the guide surface and the extending direction of the guide sleeve are provided at a predetermined angle so that the guide surface guides the thermostat.

[0028] Furthermore, the second guide segment has a flow through hole, and the gap between the second guide segment and the inner wall of the valve chamber forms a first flow passage, the flow through hole connects the chamber of the guide sleeve to the first flow passage, the first positioning flange and the inner wall of the valve chamber are spaced apart to form a second flow passage, and the freeze-proof valve core and the inner wall of the valve chamber are spaced apart to form a third flow passage, and the first flow passage connects the second flow passage to the third flow passage, allowing fluid to flow from the chamber of the guide sleeve to the drain outlet.

[0029] Furthermore, an avoidance groove is provided on the inner wall of the freeze prevention valve seat, and the second flow passage communicates with the third flow passage via the avoidance groove.

[0030] In addition, the drain valve further includes a second elastic member, which is fitted to the anti-freeze valve core, one end of the second elastic member abuts against the end surface of the anti-freeze valve core, and the other end of the second elastic member abuts against the bottom wall of the valve chamber.

[0031] Furthermore, the drain hole is located at one end of the valve chamber, the other end of the valve chamber is a communication hole, a restricting member is attached to the communication hole, and one end of the first elastic member close to the communication hole abuts against the restricting member.

[0032] Compared with the prior art, the beneficial technical effects of the present application are as follows: By integrating the intake valve and the drain valve into one unit, the present application ensures that when the drain valve drains water, the pipeline is automatically sucked in by the intake valve, so that a certain pressure is maintained in the pipeline, thereby avoiding the generation of negative pressure inside the pipeline, and ensuring that the residual water in the pipeline can be completely discharged by the drain valve. In the present application, by providing a plurality of circulation passages and a plurality of communicating grooves, and by aligning the communicating grooves one-to-one with the circulation passages, the flow of gas during inhalation is facilitated, the amount of intake air is increased, and at the same time, the guide role is performed well. [Brief description of the drawings]

[0033] The drawings in the specification that form a part of this application are intended to provide a further understanding of the application, and the schematic examples and their explanations are intended to interpret the application and are not intended to unduly limit the application.

[0034] [Figure 1] 1 is a schematic diagram showing an internal configuration of an intake valve according to a first embodiment of the present invention; [Diagram 2] FIG. 2 is a schematic diagram showing the internal configuration of the intake valve according to the first embodiment of the present application from another perspective. [Diagram 3] 1 is a schematic diagram showing the configuration of an intake valve core according to a first embodiment of the present application. [Figure 4] FIG. 2 is a front view of the intake valve core of the first embodiment of the present application. [Diagram 5] 1 is a cross-sectional view of an intake valve core according to a first embodiment of the present application. [Figure 6] FIG. 2 shows a bottom view of the valve core of the intake valve according to the first embodiment of the present application. [Figure 7] 1 is a schematic diagram showing the configuration of a drainage structure according to a first embodiment of the present application. [Figure 8] 1 is a schematic diagram showing the internal configuration of a drainage structure according to a first embodiment of the present application. [Figure 9] FIG. 9 shows a cross-sectional view in the A-A direction of the drainage structure of the first embodiment of the present application in FIG. 8 . [Figure 10] 1 is a schematic diagram showing one view of the internal configuration of a connector of a drainage structure according to a first embodiment of the present application; [Figure 11] 1 is a schematic diagram showing the internal configuration of the connector of the drainage structure according to the first embodiment of the present application from another perspective; FIG. [Figure 12] 1 is a schematic diagram showing the configuration of a drain valve of a drain structure according to a first embodiment of the present application. [Figure 13] FIG. 13 is a schematic diagram showing an internal configuration of an intake valve according to a second embodiment of the present invention. [Figure 14] FIG. 13 is a schematic diagram showing the internal configuration of the intake valve according to the second embodiment of the present invention from another perspective. [Figure 15] FIG. 13 is a schematic diagram showing the internal configuration of a valve seat of an intake valve according to a second embodiment of the present invention. [Figure 16] FIG. 13 is a schematic diagram showing the configuration of a valve seat of an intake valve according to a second embodiment of the present invention. [Figure 17] FIG. 13 is a schematic diagram showing the configuration of an intake valve core according to a second embodiment of the present invention. [Figure 18] FIG. 13 is a front view of an intake valve core according to a second embodiment of the present application. [Figure 19] FIG. 19 is a cross-sectional view of the B-B portion of the intake valve core of the second embodiment of the present invention. [Figure 20] FIG. 13 is a schematic diagram showing the structure of closing the valve port of the freeze prevention valve provided by Example 3 of the present application. [Figure 21] FIG. 2 shows a cross-sectional view of a valve seat provided by Example 3 of the present application. [Figure 22] FIG. 1 shows a top view of a valve seat provided by Example 3 of the present application. [Figure 23] FIG. 13 shows a schematic diagram of a configuration of a guide sleeve provided by Example 3 of the present application. [Figure 24] 1 shows a cross-sectional view of a guide sleeve provided by Example 3 of the present application. [Diagram 25] FIG. 2 shows a front view of a valve core provided by Example 3 of the present application. [Figure 26] FIG. 2 shows a top view of a valve core provided by Example 3 of the present application. [Figure 27] FIG. 2 shows a cross-sectional view of a valve seat provided by Example 3 of the present application. [Figure 28] FIG. 2 shows a schematic diagram of a thermostat provided by Example 3 of the present application. [Figure 29] FIG. 13 shows a cross-sectional view of the anti-freeze valve provided by Example 3 of the present application in one direction to open the valve port. [Diagram 30] FIG. 13 is a cross-sectional view of the anti-freeze valve provided by Example 3 of the present application in another direction of opening the valve port.

[0035] Here, the above drawings include the following reference numbers: 1 valve seat, 11 intake passage, 111 intake port, 12 intake chamber, 121 valve port, 13 cutoff portion, 14 exhaust port, 15 first mounting groove, 16 first sealing member, 101 first valve seat body, 102 second valve seat body, 2 valve core, 201 valve head, 202 valve body, 21 communicating cut surface, 22 communicating groove, 23 second sealing member, 24 chamfered portion, 25 second mounting groove, 3 distribution passage, 4 connector, 41 main pipe, 411 attachment port, 42 drain pipe, 5 Drain valve, 51 Anti-freeze valve core, 52 Thermostat, 521 Main body, 522 First positioning flange, 53 Anti-freeze valve seat, 531 Valve chamber, 532 Drain port, 533 Avoidance groove, 534 Communication port, 54 First elastic member, 55 Guide sleeve, 551 Cylinder, 5511 First guide segment, 5512 Second guide segment, 55121 Flow through hole, 552 Bottom cover, 553 Second positioning flange, 554 Guide surface, 56 Second elastic member, 561 Guide inclined surface, 57 Restriction member, 571 Flow port. 10 Intake valve. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] It should be noted that, unless contradictory, the embodiments and features in the embodiments in the present application can be combined with each other. The present application will be described in detail below in conjunction with the embodiments with reference to the drawings.

[0037] 1 to 12, the drainage structure of the present embodiment 1 includes a connector 4 including a main pipeline 41 and a drain pipeline 42 connected to each other, an intake valve 10 provided in the main pipeline 41, having an openable valve port 121, and communicating the valve port 121 with the main pipeline 41 when the valve port 121 is open, and a drain valve 5 provided in the drain pipeline 42, having an openable drain port, and communicating the drain port with the drain pipeline 42 when the drain port is open. By using the above configuration, the intake valve 10 and the drain valve 5 are integrated together, so that when the drain valve 5 drains, the pipeline automatically draws in air through the intake valve 10, and a certain pressure is maintained in the pipeline, thereby avoiding the generation of negative pressure inside the pipeline and ensuring that the residual water in the pipeline can be completely discharged by the drain valve 5, thereby solving the problem of low drainage efficiency of the drain valve 5 in the prior art.

[0038] In the drainage structure of this embodiment, the intake valve 10 includes a valve seat 1 having an intake chamber 12 therein, a valve port 121 located at one end of the intake chamber 12, and an exhaust port 14 at the other end of the intake chamber 12, a valve core 2 that is provided in the intake chamber 12 so as to be able to float up and down and opens and closes the valve port 121, a plurality of communication grooves 22 provided at the bottom of the valve core 2 and communicating with each other, and a plurality of circulation passages 3 that exist between the valve core 2 and the inner wall of the intake chamber 12 and communicate with the communication grooves 22 in one-to-one correspondence. In this way, by providing a plurality of circulation passages 3 and a plurality of communication grooves 22 and corresponding the communication grooves 22 to the circulation passages 3 in one-to-one correspondence, the flow of gas during intake is facilitated, the amount of intake air is increased, and the guide role is also well performed.

[0039] In some embodiments, the connector 4 is provided with a mounting port 411 and the intake valve 10 is removably mounted to the mounting port 411 .

[0040] In some embodiments, the intake valve 10 is attached to the top of the drain valve 5, the valve core 2 of the intake valve 10 is opened by its own weight, and the intake valve realizes the intake function when negative pressure occurs in the water pressure.

[0041] 1 to 6, the valve core 2 has a cylindrical structure, the communicating cross section 21 is a plane, and the intersection line between the communicating cross section 21 and the circular end surface of the valve core 2 is a tangent to the circular end surface of the valve core 2 .

[0042] In order to improve the intake efficiency, in the most recent structure of this embodiment, please refer to Figs. 1 to 6.

[0043] 1 to 6, in this embodiment, one end of each communicating groove 22 is used to communicate with the flow passage 3 corresponding to each communicating groove 22, and the other ends of each communicating groove 22 communicate with each other.

[0044] 1 to 6, in some embodiments, each communication groove 22 is provided perpendicular to the communication cut surface 21, and the extension lengths of each communication groove 22 are equal. This allows the gas to pass through the shortest path, thereby reducing the effect of the gas flow on the structure of the intake valve 10.

[0045] The intake valve of this embodiment may have a communication groove provided on the communication cut surface 21 , one end of the communication groove communicating with the valve port 121 and the other end of the communication groove communicating with the communication groove 22 .

[0046] 1 to 6, the valve seat 1 is provided with a blocking portion 13 , which is provided at an exhaust port 14 of the valve seat 1 , and the blocking portion 13 confines the valve core 2 within the intake chamber 12 .

[0047] The valve seat 1 includes a first valve seat body 101 having a valve port 121 and an intake passage 11 communicating with the valve port 121, and a second valve seat body 102 connected to the first valve seat body 101 and having at least a portion of the intake chamber 12 provided therein. There is a mounting groove between the first valve seat body 101 and the second valve seat body 102, and a first sealing member 16 is provided in the mounting groove.

[0048] Referring to Figures 1 to 12, the drain valve 5 includes an anti-freeze valve core 51, a thermostat 52, and an anti-freeze valve seat 53 connected to the drain pipe 42, the drain port is provided at one end of the anti-freeze valve seat 53, one end of the thermostat 52 is fastened and engaged with the anti-freeze valve core 51, and the thermostat 52 and the anti-freeze valve core 51 are both movably provided within the anti-freeze valve seat 53 to seal or open the drain port.

[0049] In some embodiments, the connector 4 is made of metal materials such as brass and aluminum alloys, which have good thermal conductivity and can conduct the heat of the main water pipe to the thermostat 52 well, and can more accurately prevent freezing, and can immediately open the valve to drain water when the water temperature is low, and immediately close the valve when the water temperature is high. Non-metallic materials are not suitable for connectors because of their low thermal conductivity, and stainless steel materials have relatively low thermal conductivity, so when they are used as materials for the connector 4, it is necessary to check the temperature difference between the water temperature of the main water pipe and the temperature of the thermostat 52, otherwise there is a risk of it being opened accidentally in a low temperature environment. On the other hand, materials with good thermal conductivity such as brass and aluminum alloys are suitable materials because they can ensure a low temperature difference between the main water pipe and the thermostat 52.

[0050] In some embodiments, the intake valve 10 and the connector 4 are connected by a removable structure such as a screw, thereby realizing a replaceable structure.

[0051] The drainage structure of this embodiment integrates an intake valve 10 and a drain valve 5, the water inlet of the drain valve 5 and the connector 4 are connected to each other, and the intake valve 10 and the connector 4 are connected to each other. The intake valve 10 can realize the air supply function when negative pressure occurs in the system. When there is water pressure, the intake valve is in a closed state. When the water temperature approaches 0°C, the drain valve 5 automatically opens to realize anti-freezing.

[0052] The drainage structure of this embodiment will be described below. The drainage structure can automatically suck in air when it is necessary to drain, and completely drain the water in the pipeline. The intake valve 10 is attached to the top of the drainage structure, so that the intake from the top can be realized when sucking in air, so that the negative pressure is more prominent and the drainage is smoother, while the water does not flow out automatically when there is no pressure difference. The valve core 2 of the intake valve 10 opens the valve by its own weight, and when there is water pressure, the valve core 2 moves upward under the action of the water pressure to close the valve, and when the water pressure drops to a certain level or negative pressure occurs in the valve, the valve core 2 moves downward under the action of its own weight and negative pressure difference to open the valve, thereby realizing intake. The intake valve 10 and the main pipeline 41 are connected by a screw, which realizes the maintenance and replacement function, and can facilitate replacement and maintenance without removing the entire valve.

[0053] The drain valve 5 is directly connected to the drain pipe 42 of the connector 4, which saves the space of the pipeline and eliminates the need to pull out the drain pipe separately. At the same time, the drain valve is connected to the drain pipeline, which can better sense the water temperature of the drain pipeline, and the starting temperature of the drain valve is more accurate, which can more accurately prevent freezing, and can immediately drain water when the water temperature is low and needs to be drained, and prevent water leakage and erroneous drainage when the water temperature is high.

[0054] In some embodiments, the drainage structure has a thermostat 52 that can sense temperature, and when the temperature drops to a set temperature, the thermostat 52 contracts to open the valve, and when the temperature of the thermostat 52 rises to the set temperature, the thermostat 52 expands to close the valve. By setting the opening temperature close to 0°C, the requirement of anti-freeze can be realized.

[0055] 13 to 19, the intake valve of the second embodiment of the present application includes a valve seat 1 having an intake chamber 12 therein, both ends of which are a valve port 121 and an exhaust port 14, and a valve core 2 that is provided in the intake chamber 12 so as to be able to float up and down to seal or open the valve port 121, a communication groove 22 facing the exhaust port 14 is provided at one end of the valve core 2 away from the valve port 121, a flow passage 3 exists between the valve core 2 and the side wall of the intake chamber 12, and the valve port 121, the flow passage 3, the communication groove 22 and the exhaust port 14 can be sequentially communicated with each other. With the above configuration, when the valve core 2 of the intake valve opens the intake passage 11 under the action of its own weight, it is only necessary to provide the communication groove 22 in the valve core 2 and secure the flow passage 3 between the valve core 2 and the intake chamber 12 in advance, which simplifies the structure of the intake valve.

[0056] Specifically, in this embodiment, the flow passage 3 may be formed by a clearance fit between the valve core 2 and the side wall of the intake chamber 12, or the flow passage 3 may be formed by providing a groove on the outer periphery of the valve core 2 or by providing a groove on the side wall of the intake chamber 12.

[0057] 13 and 14, in the intake valve of this embodiment, a blocking portion 13 is provided at the edge of the exhaust port 14, and the blocking portion 13 restricts the valve core 2 within the intake chamber 12. In this embodiment, a bendable blocking portion 13 is provided, and when in use, the blocking portion 13 can restrict the valve core 2 by crimping, which simplifies the assembly of the valve core 2.

[0058] In the intake valve of this embodiment, referring to Figures 13 and 14, the blocking portion 13 is bendable, and before bending, the blocking portion 13 is cylindrical extending along the axis of the intake chamber 12, the inner diameter of the blocking portion is larger than the inner diameter of the intake chamber 12, and a step is formed between the inner wall of the blocking portion 13 and the inner wall of the intake chamber 12, and after bending, the blocking portion 13 is fastened and engaged with the bottom of the valve core 2.

[0059] When installing the valve core 2, first, the valve core 2 is passed through the central passage of the cutoff part 13 and inserted into the intake chamber, and then the cutoff part 13 is bent so that the cutoff part 13 restricts the valve core 2 by crimping, thereby preventing the valve core 2 from falling out of the intake chamber. The above configuration makes it easier to install the valve core 2. The step in this embodiment can ensure the bending position of the cutoff part 13, and avoid the uncertainty of the bending position of the cutoff part 13 causing the valve core 2 to be clamped.

[0060] In some embodiments, the step of the intake valve is provided at the crimping position of the blocking portion 13, thereby limiting the bending deformation area of ​​the blocking portion 13 and preventing the blocking portion 13 from bending in other areas and becoming pinched or caught on the valve core 2.

[0061] 13 to 15, in the intake valve of this embodiment, the valve seat 1 includes a first valve seat body 101 having an intake passage 11 communicating with a valve port 121 provided therein, and a second valve seat body 102 connected to the first valve seat body 101, with at least a portion of the valve port 121 provided within the intake passage 11.

[0062] 16 to 18, in the intake valve of this embodiment, one end of the valve core 2 away from the exhaust port has a chamfered portion 24 that abuts against the cutoff portion 13. The chamfered portion 24 can further prevent the valve core 2 from being clamped after the cutoff portion 13 is crimped, thereby playing a protective role for the valve core 2.

[0063] In the intake valve of this embodiment, referring to Figures 16 to 18, there is a first mounting groove 15 between the first valve seat body 101 and the second valve seat body 102, and a first sealing member 16 is provided in the first mounting groove 15.

[0064] 16 to 19, in the intake valve of this embodiment, there are multiple intake passages 11, each of which is connected to a valve port 121, and each of the multiple intake passages 11 has an intake port 111 at one end away from the intake chamber 12.

[0065] In the intake valve of this embodiment, referring to Figures 16 to 18, the valve core 2 includes a valve head 201 that is movably arranged to seal or open the valve port 121, and a valve body 202 that is located in the intake chamber 12, connected to the valve head 201, and has a second mounting groove 25 between it and the valve head 201, and a second sealing member 23 is provided in the second mounting groove 25.

[0066] 16 to 19, in the intake valve of this embodiment, a communication groove 22 is provided in the valve body, and there are a plurality of communication grooves 22, and the plurality of communication grooves 22 are provided at intervals from each other, or there are a plurality of communication grooves 22, and the plurality of communication grooves 22 communicate with each other. This can improve the exhaust efficiency of the intake valve.

[0067] In the intake valve of this embodiment, the valve core 2 is made of a non-metallic material. By using the valve core 2 made of a non-metallic material, the occurrence of rust can be further prevented.

[0068] In this embodiment, the valve core 2 realizes the flow through the flow passage 3 between the valve seat 1 and the side wall, and the valve seat 1 is provided with an intake passage 11. When the valve is opened, the gas passes through the intake passage 11, flows through the valve port 121, and then flows through the intake valve core 2 to realize the intake of gas. When the valve needs to be closed, the pressure in the intake chamber 12 becomes greater than the external pressure, and at the beginning of the valve closing, the water in the intake chamber 12 flows through the communication groove 22 of the valve core 2, then through the flow passage 3, flows through the valve port 121, and finally flows out through the intake passage 11. When the pressure difference is insufficient, the valve core 2 is insufficient to overcome its own weight and friction force, and the intake valve will constantly drain water. In this case, if the pressure difference is not established in the valve core 2, the inside and outside pressure difference cannot be fully utilized. Therefore, during the operation of the intake valve, when the flow capacity of the valve port 121 is smaller than that of the intake passage 11, the main pressure drop of the water is applied to the valve core 2, so that the valve core 2 can close the valve with a lower pressure difference, thereby preventing excessive water flow. The lighter the material of the valve core 2 is, the smaller the closing pressure difference is, and the stronger the ability to prevent water overflow is.

[0069] Since the operation is simple, only the communicating groove 22 needs to be provided on the valve core 2 .

[0070] The intake valve of this embodiment is usually installed in a pipeline, and an anti-freeze valve is installed in the pipeline at the same time. When the pressure in the intake chamber is small or the pressure is smaller than the external pressure, the valve core 2 moves downward under the combined action of its own weight and pressure difference to realize the opening of the valve, thereby injecting air into the valve, and avoiding the air entering the pipeline and the pressure in the pipeline becoming too small; in a low temperature environment, the anti-freeze valve automatically opens, and the remaining water in the pipeline is discharged through the anti-freeze valve. Therefore, the intake valve of this embodiment can realize the pressure balance inside and outside the pipeline, and the drainage of the anti-freeze valve can be smooth.

[0071] In some embodiments, the intake valve is provided with a valve core 2 and a valve seat 1, the valve core 2 is provided with a sealing ring, the intake valve core is restricted by crimping, a communicating groove 22 is provided at the bottom of the valve core 2, a through hole is provided in the valve seat 1, the flow area of ​​the valve seat exhaust port 14 is larger than the flow area of ​​the valve seat port 121, and a step is provided at the crimping point of the valve seat 1 to prevent the valve core 2 from getting caught due to deformation of the guide surface during crimping.

[0072] In some embodiments, the outer diameter of the intake valve core 2 is smaller than the inner diameter of the valve seat 1, and communication is achieved by a gap between the valve core 2 and the valve seat 1.

[0073] In some embodiments, the head of the intake valve is provided with an O-ring groove, where an O-ring is placed to provide a more reliable seal.

[0074] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0075] In the intake valve of this embodiment, when the valve core 2 of the intake valve opens the intake passage 11 under the action of its own weight, it is sufficient to provide a communicating groove 22 in the valve core 2 and ensure in advance the flow passage 3 between the valve core 2 and the intake chamber 12, thereby simplifying the structure of the intake valve.

[0076] The intake valve of this embodiment is provided with a bendable blocking portion 13, and when in use, the blocking portion 13 can restrict the valve core 2 by crimping, so that assembly of the valve core 2 is simplified.

[0077] The step of the intake valve in this embodiment is provided at the crimping position of the blocking portion 13, thereby limiting the bending deformation area of ​​the blocking portion 13 and preventing the blocking portion 13 from bending in other areas and becoming pinched or caught on the valve core 2.

[0078] 20 to 30, the third embodiment of the present application provides a drain valve 5 including an anti-freeze valve seat 53, an anti-freeze valve core 51, a thermostat 52, a first elastic member 54 and a guide sleeve 55, the anti-freeze valve seat 53 has a valve chamber 531 and a drain port 532 communicating with the valve chamber 531, the anti-freeze valve core 51 is movably disposed in the valve chamber 531 to open and close the drain port 532. The thermostat 52 is movably disposed in the valve chamber 531, one end of the thermostat 52 is engaged with the anti-freeze valve core 51, and the first elastic member 54 is fitted to the thermostat 52. The guide sleeve 55 is fitted into the thermostat 52 and the first elastic member 54, the guide sleeve 55 extends along the extension direction of the valve chamber 531, the guide sleeve 55 is in close contact with the inner wall of the valve chamber 531, one end of the guide sleeve 55 close to the drain port 532 abuts against the thermostat 52, and one end of the first elastic member 54 close to the drain port 532 abuts against the thermostat 52 or the guide sleeve 55.

[0079] The drain valve 5 provided in this embodiment can be used by fitting the guide sleeve 55 to the thermostat 52 and the first elastic member 54, that is, by making the thermostat 52 and the first elastic member 54 both located in the chamber of the guide sleeve 55, and making at least a part of the guide sleeve 55 closely contact the inner wall of the valve chamber 531, the movement of the thermostat 52 can be effectively guided by the guide sleeve 55, the occurrence of deviation during the movement of the thermostat 52 can be avoided, the concentricity of the thermostat 52 with the anti-freeze valve seat 53 can be ensured when the thermostat 52 moves up and down, the reliability and concentricity of the movement of the thermostat 52 in the anti-freeze valve seat 53 can be improved, the positioning action of the thermostat 52 with respect to the anti-freeze valve core 51 can be improved, the anti-freeze valve core 51 can be ensured to move up and down, and the reliability of the sealing of the drain port 532 can be ensured. Therefore, the anti-freeze valve provided in this embodiment can solve the technical problem of the low sealing reliability of the drain port 532 of the drain valve 5 in the prior art.

[0080] It should be explained that in this embodiment, "at least a portion of the guide sleeve 55 is in close contact with the inner wall of the valve chamber 531" does not mean that at least a portion of the guide sleeve 55 is in complete contact with the inner wall of the valve chamber 531, and there may be a slight gap between at least a portion of the guide sleeve 55 and the inner wall of the valve chamber 531, but this slight gap does not affect the inner wall of the valve chamber 531 guiding the position of the guide sleeve 55 along the extension direction of the inner wall of the valve chamber 531, so as to effectively ensure the smoothness and stability of the guiding of the guide sleeve 55.

[0081] In this embodiment, the thermostat 52 includes a main body 521 and a first positioning flange 522 connected to each other, the first positioning flange 522 is provided to protrude from the main body 521, and one end of the guide sleeve 55 close to the drain port 532 abuts against the first positioning flange 522. Using such a structural setting makes it easy to position the thermostat 52 relative to the guide sleeve 55, improves the positioning stability of the guide sleeve 55, and also makes it easy to move the guide sleeve 55 by the thermostat 52, so that the thermostat 52 can be smoothly moved along the extension direction of the valve chamber 531 under the guiding effect of the guide sleeve 55.

[0082] Specifically, the guide sleeve 55 in this embodiment includes a cylindrical body 551 and a bottom cover 552 connected to each other, the cylindrical body 551 and the main body 521 are spaced apart from each other, and the bottom cover 552 is provided with an attachment hole that fits the main body 521, and the attachment hole is fitted into the main body 521 so that the bottom cover 552 and the first positioning flange 522 abut against each other. When such a structure is used, the abutment between the bottom cover 552 and the first positioning flange 522 increases the contact area between the bottom cover 552 and the first positioning flange 522, and further effectively improves the positioning stability for the guide sleeve 55.

[0083] In this embodiment, the cylinder 551 has a first guide segment 5511 and a second guide segment 5512 connected to each other, the second guide segment 5512 is located on the side of the first guide segment 5511 closer to the drain port 532, and the second guide segment 5512 is connected to the bottom cover 552, the first guide segment 5511 is in close contact with the inner wall of the valve chamber 531, and the second guide segment 5512 is spaced apart from the inner wall of the valve chamber 531. Using such a structural setting, it is easy to improve the guide stability for the guide sleeve 55 by the first guide segment 5511, and it is easy to reduce the guide resistance of the guide sleeve 55 by avoiding the inner wall of the valve chamber 531 by the second guide segment 5512.

[0084] In this embodiment, the cylindrical body 551 of the guide sleeve 55 is provided with a second positioning flange 553, which is provided to protrude from the inner wall of the cylindrical body 551, and the first elastic member 54 abuts against the second positioning flange 553. Using such a structural setting, it is easy to effectively position the first elastic member 54, so that the first elastic member 54 is compressed or expanded along the extension direction of the valve chamber 531, and the stability of the role of the first elastic member 54 can be improved. Specifically, the second positioning flange 553 is formed between the first guide segment 5511 and the second guide segment 5512, and the first elastic member 54 abuts against the second positioning flange 553.

[0085] Specifically, in this embodiment, a guide surface 554 is provided at one end of the guide sleeve 55 away from the drainage port 532, and the guide surface 554 and the extending direction of the guide sleeve 55 are provided at a predetermined angle so that the guide surface 554 guides the first elastic member 54. By using such a structural setting, it is easy to smoothly compress the first elastic member 54 protruding from the guide sleeve 55 into the chamber of the guide sleeve 55 under the guiding action of the guide surface 554, and the stability of the role of the elastic member can be improved.

[0086] In this embodiment, the second guide segment 5512 is provided with a through-hole 55121, and the gap between the second guide segment 5512 and the inner wall of the valve chamber 531 forms a first through-hole, the through-hole 55121 communicates the chamber of the guide sleeve 55 with the first through-hole, the first positioning flange 522 and the inner wall of the valve chamber 531 are spaced apart to form a second through-hole, the freeze-proof valve core 51 and the inner wall of the valve chamber 531 are spaced apart to form a third through-hole, and the first through-hole communicates with the second through-hole and the third through-hole, so that the fluid flows from the chamber of the guide sleeve 55 to the drain port 532. With this structural setting, when the drain valve 5 is operating, the fluid can smoothly flow from the inner wall of the guide sleeve 55 to the drain port 532, so that the drain valve 5 can operate smoothly.

[0087] Specifically, an avoidance groove 533 is provided on the inner wall of the anti-freeze valve seat 53, and the second flow gap is connected to the third flow gap through the avoidance groove 533, thereby optimizing the structural layout and facilitating flow through the second flow gap and the third flow gap, thereby enabling the fluid to flow smoothly.

[0088] In this embodiment, the anti-freeze valve core 51 has an avoidance portion, which is arranged to avoid the inner wall of the valve chamber 531 to form a third flow gap, so that the structure is simple and it is easy to produce, manufacture and realize.

[0089] Specifically, the freeze prevention valve core 51 is a cylinder having arc-shaped structures cut out on both sides thereof, and the cut-out arc-shaped structures can form avoidance sections.

[0090] In this embodiment, the drain valve 5 further includes a second elastic member 56, which is fitted into the anti-freeze valve core 51, one end of the second elastic member 56 abuts against the end face of the anti-freeze valve core 51, and the other end of the second elastic member 56 abuts against the bottom wall of the valve chamber 531, so as to ensure that the anti-freeze valve core 51 returns smoothly.

[0091] Specifically, in this embodiment, the outer diameter of the freeze-proof valve core 51 is D, and the inner diameter of the second elastic member 56 is d, dD≧0.4 mm, that is, a certain gap is ensured between the second elastic member and the freeze-proof valve core 51. By using such a structural setting, the flow capacity of the drain valve 5 can be effectively ensured.

[0092] Specifically, in this embodiment, the drain port 532 is located at one end of the valve chamber 531, and the other end of the valve chamber 531 is a communication port 534, a restricting member 57 is attached to the communication port 534, the restricting member 57 is crimped to the communication port 534, and a flow port 571 is provided in the restricting member 57.

[0093] By abutting one end of the first elastic member 54 close to the communication port 534 against the restricting member 57, the stability of the role of the first elastic member 54 can be improved. Alternatively, the main body 521 of the thermostat 52 is movably inserted into the flow port 571 of the restricting member 57, making it easy for the thermostat 52 to have a sufficient expansion and contraction space. Alternatively, one end of the first elastic member 54 close to the communication port 534 is abutted against the restricting member 57, making it easy for the thermostat 52 to have a sufficient expansion and contraction space.

[0094] It should be clarified that "the main body 521 of the thermostat 52 is movably inserted into the flow opening 571 of the restricting member 57" here does not necessarily mean that the main body 521 of the thermostat 52 is inserted into the flow opening 571 of the restricting member 57, but rather means that when the length of the thermostat 52 changes due to a change in temperature, the first elastic member 54 can be compressed and inserted into the flow opening 571 of the restricting member 57.

[0095] In this embodiment, the first elastic member 54 and the second elastic member 56 may both have a spring structure.

[0096] The drain valve 5 is composed of an anti-freeze valve seat 53, a thermostat 52, a guide sleeve 55, a first elastic member 54, an anti-freeze valve core 51, a second elastic member 56, etc., the guide sleeve 55 is provided on the outside of the thermostat 52 and the first elastic member 54, the guide sleeve 55 is guided and engaged with the valve group, the inside of the guide sleeve 55 is clearance-fitted to the thermostat 52, and the bottom of the guide sleeve 55 is in flat contact with the thermostat 52, playing a role in positioning. The inside of the guide sleeve 55 is the first elastic member 54, and the end is provided with a spring guide surface 554, which plays the role of a spring guide.

[0097] In this embodiment, the flow path is designed so that one or more flow through holes 55121 are provided at the lower end of the guide sleeve 55 to realize the flow of fluid, and the fluid flows through the inside of the guide sleeve 55, the through holes of the guide sleeve 55, the gap between the thermostat 52 and the anti-freeze valve seat 53, the flow holes of the anti-freeze valve seat 53, the side of the anti-freeze valve core 51, the gap between the anti-freeze valve core 51 and the anti-freeze valve seat 53, and the drain port 532.

[0098] Specifically, the flow through hole 55121 of the guide sleeve 55 is perpendicular to the moving direction of the guide sleeve 55, the number of flow through holes of the guide sleeve 55 is multiple, and the multiple flow through holes 55121 are provided at intervals along the periphery of the guide sleeve 55. Specifically, the number of flow through holes 55121 may be six. The anti-freeze valve seat 53 is provided with an avoidance groove 533, and there may be multiple avoidance grooves 533, and the multiple avoidance grooves 533 are provided at intervals along the periphery of the valve chamber 531. Specifically, the number of avoidance grooves 533 may be four.

[0099] In order to ensure flow capacity, the difference in diameter between the outer diameter of the freeze prevention valve core 51 and the inner diameter of the second elastic member 56 is set to ≧0.4 mm. In this embodiment, the lower end surface of the first elastic member 54 contacts the guide sleeve 55, the contact surface is higher than the through hole of the guide sleeve 55, the upper end surface of the first elastic member 54 contacts the gasket, the gasket is crimped and fixed to the freeze prevention valve seat 53, the inner diameter of the gasket is larger than the diameter of the thermostat 52, and the guide sleeve 55 is provided with a guide inclined surface 561 for guiding the spring.

[0100] Specifically, the guide sleeve 55 is provided on the outside of the thermostat 52 and the first elastic member 54, the guide sleeve 55 is guided and engaged with the valve group, the inside of the guide sleeve 55 is clearance-fitted into the thermostat 52, and the bottom of the guide sleeve 55 is in flat contact with the thermostat 52, playing a positioning role. The good engagement between the guide sleeve 55 and the anti-freeze valve seat 53 ensures effective guiding, while the slight clearance fit between the inside of the guide sleeve 55 and the thermostat 52 ensures a certain degree of coaxiality, and the close contact between the bottom of the guide sleeve 55 and the thermostat 52 ensures a certain degree of verticality, so that the thermostat 52 and the guide sleeve 55 are firmly in close contact and positioned, and the guide sleeve 55 and the anti-freeze valve seat 53 are reliably guided to move up and down, ensuring good concentricity with the anti-freeze valve seat 53 when the thermostat 52 moves up and down, greatly improving the reliability and coaxiality of the movement of the thermostat 52 within the anti-freeze valve seat 53, improving the role of positioning the thermostat 52 relative to the anti-freeze valve core 51, ensuring that the anti-freeze valve core 51 moves up and down, and ensuring the reliability of the sealing of the drain port 532.

[0101] The upper end of the guide sleeve 55 is provided with a guide inclined surface 561 for guiding the spring, so that when the thermostat 52 moves upward, it is corrected in advance so as not to be caught by the inner ring of the spring, and the guiding is more reliable. The freeze prevention valve core 51 is provided with a guide inclined surface 561 of the second elastic member 56, and the guide action between the guide inclined surface and the spring ensures stability during the movement of the guide sleeve.

[0102] In this embodiment, the fluid flows through the inside of the guide sleeve 55, the through-hole 55121, the first flow gap, the second flow gap between the thermostat 52 and the antifreeze valve seat 53, the avoidance groove 533 of the antifreeze valve seat 53, the gap between the end face of the antifreeze valve core 51 and the valve seat, the third flow gap, and the drain port 532. Since the flow diameter of each part is sufficiently large, the flow capacity is ensured, the flow capacity Kv value when the drain valve 5 is opened is improved, and the drain capacity is increased. By providing the guide sleeve 55 to perform a reliable guide and improving the flow path, the guide does not require a clearance fit between the thermostat 52 and the antifreeze valve seat 53, so that the gap between the thermostat 52 and the antifreeze valve seat 53 can be enlarged to realize a significant improvement in the flow capacity.

[0103] From the above description, it can be seen that the above embodiments of the present application achieve the technical effect of improving the reliability of the thermostat's function.

[0104] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and further, when the terms "comprise" and / or "comprise" are used herein, it is to be understood that features, steps, operations, devices, assemblies, and / or combinations thereof are present.

[0105] Unless otherwise specifically described, the relative arrangement of the components and steps, the formulas and values ​​described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for convenience of description, the dimensions of each part shown in the drawings are not drawn in actual proportion. Detailed descriptions of techniques, methods and equipment already known to those skilled in the art may be omitted, but the techniques, methods and equipment should be considered as part of the approved specification, as necessary. In all examples shown and described herein, any specific values ​​should be interpreted as being merely illustrative and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar symbols and letters represent similar things in the following drawings, so that once something is defined in one drawing, there is no need to further describe it in the subsequent drawings.

[0106] In the description of this application, orientations or positional relationships expressed by orientation terms such as "front, back, up, down, left, right", "lateral, longitudinal, vertical, horizontal", "top, bottom", etc. are generally based on the orientations or positional relationships shown in the drawings, but this is merely for the ease and simplicity of the description of this application, and unless otherwise stated, these orientation terms do not indicate or imply that the devices or elements shown necessarily have a specific orientation or are constructed and operated in a specific orientation, and should not be understood as limiting the scope of protection of this application, and orientation terms such as "inside, outside" are inside and outside with respect to the contour of each member itself.

[0107] For ease of description, spatially relative terms such as "above," "upper," "on top of," "above," and the like may be used herein to describe the spatial location of one device or feature relative to another device or feature as depicted in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations during use or operation other than the orientation depicted in the figures of the device. For example, if a device in the figures is turned upside down, a device described as "above other devices or structures" or "on top of other devices or structures" would then be positioned "below other devices or structures" or "below other devices or structures." Thus, the exemplary term "above" can include two orientations: "above" and "below." The device can also be positioned in other different ways (rotated 90 degrees or positioned in other orientations) and a corresponding interpretation made of the spatially relative descriptions used herein.

[0108] It should be further explained that the use of terms such as "first", "second", etc. to define parts is merely intended to distinguish corresponding parts, and unless otherwise specified, the above terms have no special meaning and should not be understood as limiting the scope of protection of the present application.

[0109] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. a connector (4) including a main line (41) and a drain line (42) connected to each other and communicating with each other; an intake valve (10) provided in a main pipe (41), having an openable and closable valve port (121), the valve port (121) communicating with the main pipe (41) when the valve port (121) is open; a drain valve (5) provided in the drain pipe (42), having an openable and closable drain outlet (532), and communicating the drain outlet (532) with the drain pipe (42) when the drain outlet (532) is open; Drainage structures, including:

2. The intake valve (10) is A valve seat (1) having an intake chamber (12) therein, the intake chamber (12) being provided at both ends with a valve port (121) and an exhaust port (14), a valve core (2) that is provided in an intake chamber (12) so as to be capable of floating up and down and seals or opens the valve port (121), the valve core (2) having a communication groove (22) facing the exhaust port (14) at one end of the valve core (2) remote from the valve port (121), a flow passage (3) existing between the valve core (2) and a side wall of the intake chamber (12), the valve port (121), the flow passage (3), the communication groove (22) and the exhaust port (14) being able to communicate in sequence; The drainage structure of claim 1 , comprising:

3. The drainage structure according to claim 2, wherein the communication groove (22) is provided in the valve body, the communication groove (22) is provided in a plurality of grooves, and the plurality of communication grooves (22) are provided at intervals from each other.

4. The drainage structure according to claim 2 , wherein the communication groove (22) is provided in the valve body, the communication groove (22) is provided in a plurality of grooves, and the plurality of communication grooves (22) communicate with each other.

5. The drainage structure according to claim 3 or 4, wherein a plurality of the communication grooves (22) are provided at the bottom of the valve core (2), a plurality of the flow passages (3) are provided between the valve core (2) and the inner wall of the intake chamber (12), and the communication grooves (22) and the flow passages (3) are connected in a one-to-one correspondence.

6. The drainage structure according to claim 4, wherein the circumferential wall surface of the valve core (2) has a plurality of communicating cut surfaces (21) spaced apart, and the gap between the communicating cut surfaces (21) and the inner wall of the intake chamber (12) constitutes the flow passage (3).

7. 7. The drainage structure according to claim 6, wherein the valve core (2) is a cylindrical structure, the communicating cut surface (21) is a plane, and the intersection line between the communicating cut surface (21) and the circular end surface of the valve core (2) is a tangent to the circular end surface of the valve core (2).

8. The drainage structure according to claim 7, wherein one end of each of the communicating grooves (22) is used to communicate with each of the flow passages (3) corresponding to each of the communicating grooves (22), and the other ends of each of the communicating grooves (22) communicate with each other.

9. Each of the communication grooves (22) is provided perpendicular to the communication cut surface (21), and / or The drainage structure according to claim 6, wherein the extending lengths of the communicating grooves (22) are all equal.

10. The drainage structure according to claim 6, wherein a communication groove is provided in the communicating cut surface (21), one end of the communication groove is connected to the valve port (121), and the other end of the communication groove is connected to the communicating groove (22).

11. The drainage structure according to any one of claims 2 to 4 and 6 to 10, wherein the valve seat (1) is provided with a blocking portion (13), the blocking portion (13) is provided at an exhaust port (14) of the valve seat (1), and the blocking portion (13) restricts the valve core (2) within the intake chamber (12).

12. The blocking portion (13) is bendable, and the blocking portion (13) before bending is cylindrical and extends along the axis of the intake chamber (12), the inner diameter of the blocking portion is larger than the inner diameter of the intake chamber (12), and a step is formed between the inner wall of the blocking portion (13) and the inner wall of the intake chamber (12), and the blocking portion (13) after bending is fastened and engaged with the bottom of the valve core (2), or The drainage structure according to claim 11, wherein the valve core (2) has a chamfered portion (24) at one end remote from the exhaust port (14) that abuts against the blocking portion (13).

13. The valve seat (1) is a first valve seat body (101) provided with the valve port (121) and an intake passage (11) communicating with the valve port (121); a second valve seat body (102) connected to the first valve seat body (101) and having at least a portion of the intake chamber (12) disposed therein; Including, The drainage structure according to any one of claims 2 to 4 and 6 to 10, wherein there is a mounting groove between the first valve seat body (101) and the second valve seat body (102), and a first sealing member (16) is provided in the mounting groove.

14. The drainage structure according to claim 13, wherein there are a plurality of the intake passages (11), each of the plurality of intake passages (11) communicates with the valve port (121), and each of the plurality of intake passages (11) is provided with an intake port (111) at one end remote from the intake chamber (12).

15. The valve core (2) is a valve head (201) that is movably provided to close or open the valve port (121); a valve body (202) located in the intake chamber (12), connected to the valve head (201), and having a second mounting groove (25) between the valve body (202) and the valve head (201); Including, A drainage structure according to any one of claims 2 to 4 and 6 to 10, wherein the second mounting groove (25) is provided with a second sealing member (23).

16. The drain valve (5) includes an anti-freeze valve core (51), a thermostat (52), and an anti-freeze valve seat (53) connected to the drain pipe (42), the drain port (532) is provided at one end of the anti-freeze valve seat (53), one end of the thermostat (52) is fastened and engaged with the anti-freeze valve core (51), and the thermostat (52) and the anti-freeze valve core (51) are both movably provided within the anti-freeze valve seat (53) to seal or open the drain port (532), according to any one of claims 1 to 4 and 6 to 10.

17. The freeze prevention valve seat (53) has a valve chamber (531), the valve chamber (531) is in communication with the drain port (532), and the drain valve (5) further includes a first elastic member (54) and a guide sleeve (55); The thermostat (52) is movably provided in the valve chamber (531), one end of the thermostat (52) is engaged with the freeze prevention valve core (51), and the first elastic member (54) is fitted to the thermostat (52); The drainage structure described in claim 16, wherein the guide sleeve (55) is fitted to the thermostat (52) and the first elastic member (54), the guide sleeve (55) extends along the extension direction of the valve chamber (531), at least a portion of the guide sleeve (55) is in close contact with the inner wall of the valve chamber (531), one end of the guide sleeve (55) close to the drain port (532) abuts against the thermostat (52), and one end of the first elastic member (54) close to the drain port (532) abuts against the thermostat (52) or the guide sleeve (55).

18. The drainage structure described in claim 17, wherein the thermostat (52) includes a main body portion (521) and a first positioning flange (522) connected to each other, the first positioning flange (522) protruding from the main body portion (521), and one end of the guide sleeve (55) close to the drainage port (532) abuts against the first positioning flange (522).

19. The drainage structure described in claim 18, wherein the guide sleeve (55) includes a cylindrical body (551) and a bottom cover (552) connected to each other, the cylindrical body (551) and the main body portion (521) are spaced apart from each other, the bottom cover (552) has an attachment hole that fits the main body portion (521), and the attachment hole is fitted into the main body portion (521) so that the bottom cover (552) and the first positioning flange (522) abut against each other.

20. The drainage structure described in claim 19, wherein the cylinder (551) has a first guide segment (5511) and a second guide segment (5512) connected to each other, the second guide segment (5512) is connected to the bottom cover (552), the first guide segment (5511) is in close contact with the inner wall of the valve chamber (531), and the second guide segment (5512) is spaced apart from the inner wall of the valve chamber (531).

21. The drainage structure of claim 20, wherein a second positioning flange (553) is formed between the first guide segment (5511) and the second guide segment (5512), and the first elastic member (54) abuts against the second positioning flange (553).

22. The drainage structure described in claim 20, wherein a guide surface (554) is provided at one end of the first guide segment (5511) away from the drainage port (532), and the guide surface (554) and the extension direction of the guide sleeve (55) are provided at a predetermined angle so that the guide surface (554) guides the thermostat (52).

23. The drainage structure of claim 21, wherein the second guide segment (5512) is provided with a flow through hole (55121), and a gap between the second guide segment (5512) and the inner wall of the valve chamber (531) forms a first flow passage, the flow through hole (55121) connects the chamber of the guide sleeve (55) to the first flow passage, the first positioning flange (522) and the inner wall of the valve chamber (531) are spaced apart to form a second flow passage, the freeze-proof valve core (51) and the inner wall of the valve chamber (531) are spaced apart to form a third flow passage, and the first flow passage connects the second flow passage to the third flow passage, thereby allowing fluid to flow from the chamber of the guide sleeve (55) to the drainage port (532).

24. 24. The drainage structure according to claim 23, wherein an avoidance groove (533) is provided on an inner wall of the freeze prevention valve seat (53), and the second flow passage communicates with the third flow passage via the avoidance groove (533).

25. The drain valve (5) further includes a second elastic member (56), The drainage structure described in claim 17, wherein the second elastic member (56) is fitted to the anti-freeze valve core (51), one end of the second elastic member (56) abuts against an end face of the anti-freeze valve core (51), and the other end of the second elastic member (56) abuts against a bottom wall of the valve chamber (531).

26. The drainage structure described in claim 17, wherein the drainage port (532) is located at one end of the valve chamber (531), the other end of the valve chamber (531) is a communication port (534), a restricting member (57) is attached to the communication port (534), and one end of the first elastic member (54) close to the communication port (534) abuts against the restricting member (57).

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