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 entitled "Drainage Structure", 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 entitled "Intake Valve", and 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 entitled "Anti-freeze Valve".

[0002] FIELD OF THE INVENTION This application relates to the field of drain valves, and more particularly to drain 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 damaging 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, the drain valve has difficulty in completely discharging the remaining water. Summary of the Invention

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

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

[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, with a communication groove facing the exhaust port at one end of the valve core away from the valve port, and a communication passage between the valve core and the side wall of the intake chamber, so that the valve port, communication passage, communication groove and exhaust port can be communicated with each other in sequence.

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

[0009] Furthermore, a plurality of communication grooves are provided in the valve body, and the communication grooves 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, with the communication grooves and the flow passages communicating with each other in a 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 gaps between the communicating cut surfaces and the inner wall of the intake chamber form flow passages.

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

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

[0014] Furthermore, each of the communication grooves is provided perpendicular to the communication cross section, and / or the extension lengths of each of the communication grooves are equal.

[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] Furthermore, the valve seat is provided with a blocking portion, which is provided at the exhaust port of the valve seat, and the blocking portion restricts 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. After being bent, the blocking portion is fastened and engaged with the bottom of the valve core, or there is a chamfered portion at one end of the valve core away from the exhaust port 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 formed therein, a mounting groove being formed between the first valve seat body and the second valve seat body, and a first sealing member being provided in the mounting groove.

[0019] Furthermore, 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] The valve core further includes a movably provided valve head for sealing or opening the valve port, and a valve body located in the intake chamber, connected to the valve head, with a second mounting groove provided between the valve head and the valve body, and a second sealing member 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] Furthermore, 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 within 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 near the drain port abuts the thermostat, and one end of the first elastic member near 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 abutting against the first positioning flange.

[0024] Furthermore, 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, the bottom cover has an attachment hole that fits the main body portion, and the attachment hole is fitted to the main body portion so that the bottom cover abuts against the first positioning flange.

[0025] Furthermore, 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 away from the drain outlet, and the guide surface and the extension direction of the guide sleeve are arranged at a predetermined angle so that the guide surface guides the thermostat.

[0028] Furthermore, a flow through hole is provided in the second guide segment, 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 anti-freeze 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 the fluid to flow from the chamber of the guide sleeve to the drain port.

[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] Furthermore, 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 abutting against the end surface of the anti-freeze valve core, and the other end of the second elastic member abutting against the bottom wall of the valve chamber.

[0031] Furthermore, the drain port is located at one end of the valve chamber, the other end of the valve chamber is a communication port, a restricting member is attached to the communication port, and one end of the first elastic member close to the communication port 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 allows the pipeline to automatically draw air in through the intake valve when the drain valve drains, ensuring that a certain pressure is maintained within the pipeline, thereby avoiding the generation of negative pressure within the pipeline and ensuring that the remaining water in the pipeline can be completely discharged through the drain valve. In the present application, by providing a plurality of circulation passages and a plurality of communicating grooves, and by making the communicating grooves correspond 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 also performed well. [Brief explanation 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 descriptions thereof are intended to aid in the interpretation of 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; [Figure 2] 2 is a schematic diagram showing the internal configuration of the intake valve according to the first embodiment of the present invention from another perspective. FIG. [Figure 3] 1 is a schematic diagram showing the structure of a valve core of an intake valve according to a first embodiment of the present application. [Figure 4] FIG. 2 is a front view of the valve core of the intake valve according to the first embodiment of the present application. [Figure 5] 1 shows a cross-sectional view of a valve core of an intake valve according to a first embodiment of the present application. [Figure 6] 1 shows a bottom view of the valve core of the intake valve of Example 1 of the present application. [Figure 7] 1 shows a schematic diagram of the 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] 8 shows a cross-sectional view of the drainage structure of Example 1 of the present application taken along the line A-A. [Figure 10] 1 is a schematic diagram showing the internal configuration of a connector of a drainage structure according to a first embodiment of the present application from one perspective; [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. [Figure 12] 1 shows a schematic diagram of the configuration of a drain valve of a drain structure according to a first embodiment of the present application. [Figure 13] FIG. 10 is a schematic diagram showing an internal configuration of an intake valve according to a second embodiment of the present invention. [Figure 14] FIG. 10 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] 10 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] 10 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] 10 is a schematic diagram showing the configuration of a valve core of an intake valve according to a second embodiment of the present invention. [Figure 18] FIG. 10 is a front view of an intake valve core according to a second embodiment of the present invention. [Figure 19] FIG. 19 is a cross-sectional view of the B-B portion of the intake valve core of the second embodiment in FIG. [Figure 20] FIG. 10 shows a schematic diagram of the structure of closing the valve port of the anti-freeze valve provided by Example 3 of the present application. [Figure 21] 1 shows a cross-sectional view of a valve seat provided by Example 3 of the present application. [Figure 22] 1 shows a top view of a valve seat provided by Example 3 of the present application. [Figure 23] 10 shows a schematic diagram of the configuration of a guide sleeve provided by Example 3 of the present application. [Figure 24] 10 shows a cross-sectional view of a guide sleeve provided by Example 3 of the present application. [Figure 25] FIG. 1 shows a front view of a valve core provided by Example 3 of the present application. [Figure 26] 1 shows a top view of a valve core provided by Example 3 of the present application. [Figure 27] 1 shows a cross-sectional view of a valve seat provided by Example 3 of the present application. [Figure 28] 1 shows a schematic diagram of the configuration of a thermostat provided by Example 3 of the present application. [Figure 29] FIG. 10 shows a cross-sectional view of the anti-freeze valve provided by Example 3 of the present application, with the valve port opened in one direction. [Figure 30] 10 shows 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 numerals: 1 valve seat, 11 intake passage, 111 intake port, 12 intake chamber, 121 valve port, 13 blocking 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 INVENTION

[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 first embodiment includes a connector 4 including a main pipeline 41 and a drain pipeline 42 connected and communicating with each other, an intake valve 10 provided in the main pipeline 41, having an openable / closable valve port 121, which communicates 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 / closable drain port, which communicates with the drain pipeline 42 when the drain port is open. With the above configuration, the intake valve 10 and the drain valve 5 are integrated, so that when the drain valve 5 drains, the intake valve 10 automatically draws air into the pipeline, maintaining a constant pressure in the pipeline and preventing negative pressure from occurring inside the pipeline. This ensures that the drain valve 5 can completely discharge any remaining water in the pipeline, thereby resolving the problem of the 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 movably mounted within the intake chamber 12 to open and close the valve port 121, a plurality of communicating grooves 22 located at the bottom of the valve core 2 and communicating with each other, and a plurality of communication passages 3 that exist between the valve core 2 and the inner wall of the intake chamber 12 and communicate with the communicating grooves 22 in one-to-one correspondence. Thus, by providing a plurality of communication passages 3 and a plurality of communicating grooves 22 and aligning the communicating grooves 22 with the communication passages 3 in one-to-one correspondence, the flow of gas during intake is facilitated, increasing the amount of intake air and also effectively fulfilling its guiding role.

[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, and the valve core 2 of the intake valve 10 opens 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 face of the valve core 2 is a tangent to the circular end face of the valve core 2.

[0042] In order to improve intake efficiency, Intake In the structure, please refer to FIGS.

[0043] Referring to Figures 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 are connected to each other.

[0044] 1 to 6, in some embodiments, each of the communication grooves 22 is provided perpendicular to the communication cross section 21, and the extension lengths of each of the communication grooves 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 formed in 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 the 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 an intake chamber 12 provided therein. An attachment groove is provided between the first valve seat body 101 and the second valve seat body 102, and a first sealing member 16 is provided in the attachment 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, connector 4 is made of a metal material, such as brass or aluminum alloy, which has good thermal conductivity and can effectively transfer heat from the main water pipe to thermostat 52 for more accurate freeze prevention, allowing the valve to immediately open to drain water when the water temperature is low and immediately close when the water temperature is high. Non-metallic materials are not suitable for connectors due to their low thermal conductivity. Stainless steel has relatively low thermal conductivity, so if stainless steel is used for connector 4, it is necessary to check the temperature difference between the water temperature in the main water pipe and the temperature of thermostat 52, otherwise there is a risk of it opening accidentally in low-temperature environments. On the other hand, materials with good thermal conductivity, such as brass or aluminum alloy, are suitable because they can ensure a low temperature difference between the main water pipe and 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 drainage valve 5, the water inlet of the drainage 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 closed, and when the water temperature approaches 0°C, the drainage valve 5 automatically opens to prevent freezing.

[0052] The drainage structure of this embodiment will be described below. The drainage structure automatically draws in air when drainage is required, allowing the water in the pipeline to be completely discharged. By attaching the intake valve 10 to the top of the drainage structure, air can be drawn in from the top during intake, creating a more pronounced negative pressure for smoother drainage, while preventing water from automatically flowing out when there is no pressure differential. The valve core 2 of the intake valve 10 opens under its own weight. When water pressure is present, the valve core 2 moves upward under the action of water pressure to close the valve. When the water pressure drops to a certain level or negative pressure develops within the valve, the valve core 2 moves downward under the action of its own weight and the negative pressure differential to open the valve, thereby allowing air to be drawn in. The threaded connection between the intake valve 10 and the main pipeline 41 allows for easy maintenance and replacement, eliminating the need to remove the entire valve.

[0053] The drain valve 5 is directly connected to the drain pipe 42 of the connector 4, which saves pipeline space and eliminates the need to run a separate drain pipe. At the same time, the drain valve is connected to the drain pipeline, which allows it to better sense the water temperature in the drain pipeline, making the start-up temperature of the drain valve more accurate and providing more accurate anti-freezing protection, allowing for immediate drainage when the water temperature is low and drainage is necessary, and preventing water leakage and accidental 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, anti-freeze requirements can be achieved.

[0055] 13 to 19, the intake valve of Example 2 of the present application includes a valve seat 1 having an intake chamber 12 therein, the intake chamber 12 having a valve port 121 and an exhaust port 14 at both ends, and a valve core 2 floating up and down within the intake chamber 12 to seal or open the valve port 121, the valve core 2 having a communicating groove 22 facing the exhaust port 14 at one end away from the valve port 121, a flow passage 3 between the valve core 2 and the side wall of the intake chamber 12, and the valve port 121, the flow passage 3, the communicating groove 22, and the exhaust port 14 communicating in sequence. With this configuration, when the intake valve core 2 of the intake valve opens the intake passage 11 under its own weight, it is sufficient to provide the communicating groove 22 in the valve core 2 to ensure the flow passage 3 between the valve core 2 and the intake chamber 12 in advance, thereby simplifying 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 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 tubular 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 pass the valve core 2 through the central passage of the blocking part 13 and insert it into the intake chamber, then bend the blocking part 13 so that the blocking part 13 restricts the valve core 2 by crimping, 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 ensures the bending position of the blocking part 13, preventing uncertainty in the bending position of the blocking part 13 from causing it to tighten against the valve core 2.

[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 causing pinching or catching on the valve core 2.

[0061] Referring to Figures 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 blocking portion 13. The chamfered portion 24 can further prevent the valve core 2 from being clamped after the blocking portion 13 is crimped, thereby providing 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] Referring to Figures 16 to 19, the intake valve of this embodiment has multiple intake passages 11, each of which is connected to a valve port 121, and each of which has an intake port 111 at one end away from the intake chamber 12.

[0065] 16 to 18, in the intake valve of this embodiment, 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 plurality of communication grooves 22 are provided in the valve body, and the plurality of communication grooves 22 are provided at intervals from each other, or the plurality of communication grooves 22 are provided and communicate with each other. This improves 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, which can further prevent rust.

[0068] In this embodiment, the valve core 2 communicates with the side wall of the valve seat 1 via the flow passage 3. The valve seat 1 is provided with an intake passage 11. When the valve is open, gas passes through the intake passage 11, flows through the valve port 121, and then flows through the intake valve core 2 to achieve gas intake. When the valve needs to be closed, the pressure in the intake chamber 12 exceeds the external pressure. At the beginning of valve closing, the water in the intake chamber 12 flows through the connecting 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. If the pressure difference is insufficient, the valve core 2 will not be able to overcome its own weight and frictional force, and the intake valve will continue to drain. In this case, unless a pressure difference is established in the valve core 2, the internal and external pressure differential cannot be fully utilized. Therefore, when the flow capacity of the valve port 121 is smaller than that of the intake passage 11 during operation, the main pressure drop of the water is applied to the valve core 2, allowing the valve core 2 to close with a lower pressure difference and preventing excessive water flow. The lighter the material of the valve core 2, the smaller the valve closing pressure difference and the stronger the ability to prevent water overflow.

[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, which is also equipped with an anti-freeze valve. When the pressure in the intake chamber is low or lower than the external pressure, the valve core 2 moves downward under the combined action of its own weight and the pressure difference, opening the valve and injecting air into the valve, preventing air from entering the pipeline and causing the pressure in the pipeline to become too low. In low-temperature environments, the anti-freeze valve automatically opens, allowing residual water in the pipeline to be discharged through the anti-freeze valve. Therefore, the intake valve of this embodiment achieves pressure balance between the inside and outside of the pipeline, allowing the anti-freeze valve to drain smoothly.

[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 connecting 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, and an O-ring is placed therein to provide a more secure 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, making it easy to assemble the valve core 2.

[0077] The step of the intake valve in this embodiment is located 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 causing tightening or catching on the valve core 2.

[0078] 20 to 30 , Example 3 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 within the valve chamber 531 to open and close the drain port 532. The thermostat 52 is movably disposed within 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 to 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 near the drain port 532 abuts against the thermostat 52, and one end of the first elastic member 54 near the drain port 532 abuts against the thermostat 52 or the guide sleeve 55.

[0079] In the drain valve 5 provided in this embodiment, by fitting the guide sleeve 55 to the thermostat 52 and the first elastic member 54, i.e., by having both the thermostat 52 and the first elastic member 54 positioned within the chamber of the guide sleeve 55 and at least a portion of the guide sleeve 55 in close contact with the inner wall of the valve chamber 531, the movement of the thermostat 52 can be effectively guided by the guide sleeve 55, preventing misalignment during movement of the thermostat 52 and ensuring good concentricity with the anti-freeze valve seat 53 as the thermostat 52 moves up and down, improving the reliability and coaxiality of the movement of the thermostat 52 within the anti-freeze valve seat 53, improving the positioning effect of the thermostat 52 relative to the anti-freeze valve core 51, ensuring the anti-freeze valve core 51 can move up and down, and ensuring reliable sealing of the drain port 532. Therefore, the anti-freeze valve provided in this embodiment solves the technical problem of low sealing reliability of the drain port 532 of the drain valve 5 in the prior art.

[0080] It should be noted 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 smooth and stable 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 protruding 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 this structural setting facilitates positioning relative to the guide sleeve 55, improves the positioning stability of the guide sleeve 55, and also facilitates movement of the guide sleeve 55 by the thermostat 52, allowing the thermostat 52 to move smoothly along the extension direction of the valve chamber 531 under the guiding action 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, 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 abuts against the first positioning flange 522. With this structure, 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 of the guide sleeve 55.

[0083] In this embodiment, the cylindrical body 551 has a first guide segment 5511 and a second guide segment 5512 connected to each other, the second guide segment 5512 being located on the side of the first guide segment 5511 closer to the drain port 532 and connected to the bottom cover 552, the first guide segment 5511 being in close contact with the inner wall of the valve chamber 531, and the second guide segment 5512 being spaced apart from the inner wall of the valve chamber 531. Using such a structural setting can facilitate improving the guiding stability of the guide sleeve 55 by the first guide segment 5511, and can facilitate reducing the guiding resistance of the guide sleeve 55 by allowing the second guide segment 5512 to avoid the inner wall of the valve chamber 531.

[0084] In this embodiment, a second positioning flange 553 is provided on the cylindrical body 551 of the guide sleeve 55, and the second positioning flange 553 protrudes from the inner wall of the cylindrical body 551, and the first elastic member 54 abuts against the second positioning flange 553. Using this structural setting makes it easy to effectively position the first elastic member 54, allowing the first elastic member 54 to compress or expand along the extension direction of the valve chamber 531, and improving the stability of the role of the first elastic member 54. 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 form a predetermined angle so that the guide surface 554 guides the first elastic member 54. Using this structural setting, the first elastic member 54 protruding from the guide sleeve 55 can be easily compressed smoothly into the chamber of the guide sleeve 55 under the guiding action of the guide surface 554, thereby improving the stability of the function of the elastic member.

[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, which connects 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, and the freeze-proof valve core 51 and the inner wall of the valve chamber 531 are spaced apart to form a third through-hole, which connects the second through-hole with the third through-hole, allowing fluid to flow from the chamber of the guide sleeve 55 to the drain port 532. This structural configuration allows fluid to smoothly flow from the inner wall of the guide sleeve 55 to the drain port 532 when the drain valve 5 is operating, ensuring smooth operation of the drain valve 5.

[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 the structure is simple and it is easy to produce, manufacture and realize.

[0089] Specifically, the anti-freeze valve core 51 has a cylindrical body with arc-shaped structures cut out on both sides, and the cut-out arc 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, if the outer diameter of the freeze prevention valve core 51 is D and the inner diameter of the second elastic member 56 is d, then dD≧0.4 mm, that is, a certain gap is ensured between the second elastic member and the freeze prevention 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, to which a restricting member 57 is attached, and the restricting member 57 is crimped to the communication port 534, and the restricting member 57 is provided with a flow port 571.

[0093] By abutting the 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, by movably inserting the main body 521 of the thermostat 52 into the flow port 571 of the restricting member 57, it becomes easier to ensure that the thermostat 52 has sufficient expansion and contraction space. Alternatively, by abutting the end of the first elastic member 54 close to the communication port 534 against the restricting member 57, it becomes easier to ensure that the thermostat 52 has sufficient expansion and contraction space.

[0094] It should be noted that "the main body 521 of the thermostat 52 is movably inserted into the flow port 571 of the restricting member 57" does not necessarily mean that the main body 521 of the thermostat 52 is inserted into the flow port 571 of the restricting member 57, but rather means that when the length of the thermostat 52 changes due to a temperature change, the first elastic member 54 can be compressed and inserted into the flow port 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, and the guide sleeve 55 is a valve seat 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, fulfilling the role of positioning. Inside the guide sleeve 55 is a first elastic member 54, and at its end is provided a spring guide surface 554, which serves as a spring guide.

[0097] In this embodiment, the flow path is designed so that one or more circulation through-holes 55121 are provided at the lower end of the guide sleeve 55 to allow fluid flow, 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 circulation 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 communication through-holes 55121 of the guide sleeve 55 are perpendicular to the movement direction of the guide sleeve 55, the number of communication through-holes of the guide sleeve 55 is multiple, and the communication through-holes 55121 are spaced apart along the periphery of the guide sleeve 55. Specifically, the number of communication 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, which are spaced apart along the periphery of the valve chamber 531. Specifically, the number of avoidance grooves 533 may be four.

[0099] To ensure flow capacity, the difference in diameter between the outer diameter of the anti-freeze 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 being higher than the through-hole of the guide sleeve 55, the upper end surface of the first elastic member 54 contacts the gasket, and the gasket is fixed by crimping to the anti-freeze 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 that guides the spring.

[0100] Specifically, the guide sleeve 55 is provided on the outside of the thermostat 52 and the first elastic member 54, and the guide sleeve 55 is seatThe 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, which serves as a positioning function. The good engagement between the guide sleeve 55 and the anti-freeze valve seat 53 ensures effective guidance, and the slight clearance fit between the inside of the guide sleeve 55 and the thermostat 52 ensures a certain degree of coaxiality. The close contact between the bottom of the guide sleeve 55 and the thermostat 52 ensures a certain degree of verticality, ensuring that the thermostat 52 and the guide sleeve 55 are tightly fitted and positioned. The reliable guide movement between the guide sleeve 55 and the anti-freeze valve seat 53 up and down ensures 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. This improves the role of positioning the thermostat 52 relative to the anti-freeze valve core 51, ensuring that the anti-freeze valve core 51 can move up and down, and ensuring reliable 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, which compensates in advance when the thermostat 52 moves upward so that it does not get caught on the inner ring of the spring, ensuring more reliable guidance. The anti-freeze valve core 51 is provided with a guide inclined surface 561 of the second elastic member 56, and the guiding 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 551, the first gap, and the gap between the thermostat 52 and the anti-freeze valve seat 53. No. The fluid flows through the second flow gap, the groove 533 of the anti-freeze valve seat 53, the gap between the end face of the anti-freeze valve core 51 and the valve seat, the third flow gap, and the drain port 532. diameteris sufficiently large, ensuring the flow capacity, improving the flow capacity Kv value when the drain valve 5 is open, and increasing the drainage capacity. By providing a guide sleeve 55 to ensure reliable guiding and improving the flow path, the guide does not require a clearance fit between the thermostat 52 and the anti-freeze valve seat 53, so the gap between the thermostat 52 and the anti-freeze valve seat 53 can be increased, and a significant improvement in the flow capacity can be achieved.

[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 particular embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular also intends to include the plural unless the context clearly dictates otherwise, and it should also be understood that when the terms "comprise" and / or "comprises" are used herein, it means that features, steps, operations, devices, assemblies, and / or combinations thereof are present.

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

[0106] In the description of this application, orientations or positional relationships expressed by directional terms such as "front, rear, top, bottom, left, right," "lateral, longitudinal, vertical, horizontal," and "top, bottom" 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 directional terms do not necessarily indicate or imply that the devices or elements shown have a specific orientation or are constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of this application, and directional terms such as "inside, outside" refer to the inside and outside of the contours of each member itself.

[0107] For convenience of description, spatially relative terms such as "above," "upper," "on top of," "above," etc. may be used herein to describe the spatial location of one device or feature relative to another device or feature, as shown in the figures. It should be understood that 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 were 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 encompass two orientations: "above" and "below." The device can also be oriented in other different ways (rotated 90 degrees or positioned at other orientations) and a corresponding interpretation given to the spatially relative descriptions used herein.

[0108] It should be further explained that the use of terms such as "first" and "second" to define components is merely for distinguishing corresponding components, and unless otherwise specified, the terms do not have any 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, and 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 shall be included in the protection scope of the present application.

Claims

1. a connector (4) including a main pipe (41) and a drain pipe (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), such that when the valve port (121) is open, the valve port (121) communicates with the main pipe (41); a drain valve (5) provided in the drain pipe (42), having an openable / closable drain outlet (532), and when the drain outlet (532) is open, the drain outlet (532) communicates with the drain pipe (42); Including, The intake valve (10) a valve seat (1) having an intake chamber (12) therein, the intake chamber (12) having a valve port (121) and an exhaust port (14) at both ends thereof; a valve core (2) that is provided in the intake chamber (12) so as to be able to float up and down and seal or open 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) away from the valve port (121), a flow passage (3) existing between the valve core (2) and a 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; Including, The drainage structure has a plurality of communicating grooves (22) provided in the valve body, the communicating grooves (22) being in communication with each other.

2. A drainage structure as described in claim 1, wherein the multiple communicating grooves (22) are arranged at intervals from each other.

3. A drainage structure as described in claim 1 or 2, 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 present 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.

4. The drainage structure of claim 1, 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).

5. The drainage structure according to claim 4, wherein the valve core (2) is a cylindrical structure and the communicating cut surface (21) is a plane.

6. The drainage structure according to claim 5, 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 the communicating grooves (22) communicate with each other.

7. Each of the communication grooves (22) is provided perpendicular to the communication cut surface (21), and / or 5. The drainage structure according to claim 4, wherein the communicating grooves (22) have the same extending length.

8. The drainage structure according to any one of claims 1 to 2 and 4 to 7, 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).

9. The drainage structure of claim 8, wherein the blocking portion (13) is bendable, the blocking portion (13) before bending 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), 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).

10. A drainage structure as described in Claim 8, wherein one end of the valve core (2) away from the exhaust port (14) has a chamfered portion (24) that abuts against the blocking portion (13).

11. The valve seat (1) 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, 8. The drainage structure according to claim 1, wherein a mounting groove is provided 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.

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

13. The valve core (2) is a valve head (201) that is movably provided to seal 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) formed between the valve body (202) and the valve head (201); Including, 8. The drainage structure according to any one of claims 1 to 2 and 4 to 7, wherein the second mounting groove (25) is provided with a second sealing member (23).

14. 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 outlet (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 both the thermostat (52) and the anti-freeze valve core (51) are movably provided within the anti-freeze valve seat (53) to seal or open the drain outlet (532). A drain structure as described in any one of claims 1 to 2 and 4 to 7.

15. A connector (4) including a main pipe (41) and a drain pipe (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), such that when the valve port (121) is open, the valve port (121) communicates with the main pipe (41); a drain valve (5) provided in the drain pipe (42), having an openable / closable drain outlet (532), and when the drain outlet (532) is open, the drain outlet (532) communicates with the drain pipe (42); Including, 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); The anti-freeze valve seat (53) has a valve chamber (531), and the valve chamber (531) communicates with the drain port (532). 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 anti-freeze valve core (51), and the first elastic member (54) is fitted to the thermostat (52); A drainage structure in which 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 outlet (532) abuts against the thermostat (52), and one end of the first elastic member (54) close to the drain outlet (532) abuts against the thermostat (52) or the guide sleeve (55).

16. The drainage structure described in claim 15, 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).

17. The drainage structure of claim 16, 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, the bottom cover (552) has an attachment hole that fits the main body portion (521), and the attachment hole is fitted to the main body portion (521) so that the bottom cover (552) and the first positioning flange (522) abut against each other.

18. The drainage structure described in claim 17, wherein the cylindrical body (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).

19. A drainage structure as described in claim 18, 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).

20. 20. The drainage structure according to claim 18, wherein the first guide segment (5511) is provided with a guide surface (554) at one end thereof remote from the drainage opening (532).

21. The drainage structure of claim 19, wherein the second guide segment (5512) has a flow through hole (55121), and the 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, and 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, allowing fluid to flow from the chamber of the guide sleeve (55) to the drain port (532).

22. 22. The drainage structure according to claim 21, wherein an avoidance groove (533) is provided on the inner wall of the anti-freeze valve seat (53), and the second flow passage communicates with the third flow passage via the avoidance groove (533).

23. The drain valve (5) further includes a second elastic member (56), The drainage structure described in claim 15, 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 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).

24. The drainage structure of claim 15, 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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