Drain Valve Assembly

Abstract

The present invention provides a drain valve assembly including: a connection seat (10) having a water inlet / outlet passage (11) and a solenoid valve (40), the solenoid valve (40) communicating with the water inlet / outlet passage (11); an intake valve (20) provided on the connection seat (10), the intake valve (20) having an openable / closable intake port (21), and communicating between the intake port (21) and the water inlet / outlet passage (11) when the intake port (21) is open; an anti-freeze valve (30) provided on the connection seat (10), the anti-freeze valve (30) having a drain passage (31) and an openable / closable drain port (32), and communicating between the drain port (32) and the drain passage (31) when the drain port (32) is open; and a solenoid valve (40) attached within a solenoid valve seat (44), the solenoid valve (40) used to connect or disconnect the solenoid valve passage (12) and the drain passage (31). By providing the intake valve (20), residual fluid in the water inlet / outlet passage (11) is transported to the anti-freeze valve (30) and then discharged from the drain valve assembly, preventing the residual fluid in the water inlet / outlet passage (11) from freezing in low temperature environments, and by providing the solenoid valve (40), a situation in which the anti-freeze valve (30) always drains when fluid is flowing in the water inlet / outlet passage (11) is avoided, improving the performance and reliability of the drain valve assembly.

Description

[Technical Field]

[0001] FIELD OF THE INVENTION This application relates to the field of drain valves, and more particularly to drain valve assemblies. [Background technology]

[0002] Currently, with the widespread application of drain valve assemblies, the requirements for their use are also becoming increasingly higher. In the prior art, the anti-freeze valve in a drain valve assembly may not completely drain after the drain valve assembly is used, resulting in the phenomenon that the water that cannot be drained freezes when the drain valve assembly is in a low-temperature environment, or the anti-freeze valve may constantly drain water during the use of the drain valve assembly, causing the fluid flowing through the drain valve assembly to be diverted, which affects the normal use of the drain valve assembly. Summary of the Invention

[0003] The present application provides a drain valve assembly that improves on the performance and reliability of prior art drain valve assemblies.

[0004] In order to solve the above problems, the present application provides a drain valve assembly including: a connecting seat having water inlet and outlet passages and a solenoid valve, the solenoid valve communicating with the water inlet and outlet passages; an intake valve provided on the connecting seat, the intake port being openable and closable, and communicating with the water inlet and outlet passages when the intake port is open; an anti-freeze valve provided on the connecting seat, the anti-freeze valve having a drain passage and an openable and closable drain port, and communicating with the drain port when the drain port is open; and a solenoid valve mounted within the solenoid valve, the solenoid valve being used to connect or disconnect the solenoid valve passage and the drain passage.

[0005] Furthermore, the intake valve is located above the water inlet and outlet passages, the anti-freeze valve is located below the water inlet and outlet passages, and the drain port is located at the lower end of the drain passage.

[0006] Furthermore, both the intake valve and the anti-freezing valve are provided vertically.

[0007] Furthermore, the solenoid valve is located below the water inlet and outlet passage, the solenoid valve is located above the anti-freezing valve, and the solenoid valve is provided horizontally.

[0008] Furthermore, the connection seat includes a connection block, an intake valve joint, an anti-freezing valve joint and two water inlet and outlet joints. Here, the intake valve joint is provided above the connection block, the anti-freezing valve joint is provided below the connection block, and the two water inlet and outlet joints are respectively provided on opposite sides of the connection block. Here, the solenoid valve is located within the connection block, the intake valve is attached to the intake valve joint, the solenoid valve is attached to the connection block, and the anti-freezing valve is attached to the anti-freezing valve joint.

[0009] Furthermore, the intake valve includes an intake valve seat and an intake valve core. The intake valve seat is connected to the connection seat. The intake valve seat has an intake port, an intake chamber and an exhaust port provided in order from top to bottom. The intake valve core is provided in the intake chamber so as to be vertically movable up and down. The exhaust port is communicated with the water inlet and outlet passage. Here, when the intake port is opened, the intake port, the intake chamber and the exhaust port are communicated in sequence.

[0010] Furthermore, the outer wall of the intake valve core and the inner wall of the intake chamber are clearance-fitted. Let the gravity of the intake valve core be G, the downward fluid pressure received by the upper side of the intake valve core be F1, and the upward fluid pressure received by the lower side of the intake valve core be F2. Here, when F2 - F1 > G, the intake valve core closes the intake port, and when F2 - F1 < G, the intake valve core opens the intake port.

[0011] Furthermore, the intake valve core includes a sealing head, a connecting segment, and a guide segment connected in order, the radial size of the guide segment is larger than the radial sizes of the sealing head and the connecting segment, the outer wall of the guide segment and the inner wall of the intake chamber are clearance-fitted, the sealing head has a first annular groove, and the intake valve further includes a first sealing ring, which is disposed in the first annular groove, and when the intake port is closed, the first sealing ring and the sealing head seal the intake port.

[0012] Furthermore, the anti-freeze valve includes an anti-freeze valve seat, an anti-freeze valve core, and a thermostat, a drain passage is provided in the anti-freeze valve seat, a 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 the thermostat and the anti-freeze valve core are both movably provided within the drain passage so as to seal or open the drain port.

[0013] Furthermore, the solenoid valve includes a spindle structure, a first flow port and a second flow port that are connected to each other, the first flow port is connected to the water inlet / outlet passage, and the second flow port is connected to the water drain passage in an openable / closable manner, and the spindle structure is movable along a direction approaching or moving away from the second flow port so as to seal or open the second flow port.

[0014] Furthermore, the connecting seat further has an intake valve passage, a tilted passage and an anti-freeze valve passage, and the intake valve passage, water inlet / outlet passage, tilted passage, solenoid valve passage and anti-freeze valve passage are connected in sequence, where the intake valve passage is used to install the intake valve, and the anti-freeze valve passage is used to install the anti-freeze valve.

[0015] Furthermore, the intake valve passage is located above the water inlet and outlet passages, and the solenoid valve passage and the anti-freeze valve passage are located below the water inlet and outlet passages.

[0016] Furthermore, the water inlet and outlet passages are provided horizontally, the intake valve passage is provided vertically, and the anti-freeze valve passage is provided vertically.

[0017] Furthermore, the solenoid valve passage is located between the water inlet / outlet passage and the antifreeze valve passage, the solenoid valve passage is provided horizontally, and the inclined passage is provided inclined relative to the horizontal direction.

[0018] Furthermore, the intake valve passage and the anti-freeze valve passage are provided coaxially, and the solenoid valve passage is perpendicular to the water inlet and outlet passages.

[0019] Furthermore, the inner wall of the intake valve passage has a fourth annular groove, which is used to place a sealing ring; or the inner wall of the solenoid valve passage has a second annular groove, which is used to place a sealing ring; or the inner wall of the anti-freeze valve passage has a third annular groove, which is used to place a sealing ring.

[0020] Furthermore, the connecting seat further has an intake valve passage, which is used to attach the intake valve, and the intake valve passage has an internal thread, and the outer walls of the two water inlet and outlet joints both have external threads.

[0021] Furthermore, the connecting seat is of one piece construction.

[0022]

[0006] Applying the technical aspects of the present application, there is provided a drain valve assembly including: a connecting seat having water inlet and outlet passages and a solenoid valve, the solenoid valve communicating with the water inlet and outlet passages; an intake valve provided on the connecting seat, the intake valve having an openable and closable intake port, and communicating the water inlet and outlet passages when the intake port is open; an anti-freeze valve provided on the connecting seat, the anti-freeze valve having a drain passage and an openable and closable drain port, and communicating the water outlet and the drain passages when the drain port is open; and a solenoid valve attached within the solenoid valve, the solenoid valve used to connect or disconnect the solenoid valve passage and the drain passage. When this aspect is adopted, the intake port is disconnected from the water inlet and outlet passages, and in this case, fluid flows through the water inlet and outlet passages, and the fluid in the water inlet and outlet passages is not diverted by the intake valve. When the air inlet is open, the water inlet and outlet passages are connected, allowing air to enter the passages to equalize the internal and external pressures, and residual fluid in the passages flows to the anti-freeze valve by gravity. At the same time, when fluid is flowing through the passages, the passages are blocked by the solenoid valve and the drain passage. When no fluid is flowing through the passages, the passages are connected by the solenoid valve and the drain passage. With this design, the air inlet valve transports residual fluid in the passages to the anti-freeze valve and then discharges it from the drain valve assembly without affecting the performance of the passages. This prevents residual fluid in the passages from freezing in low-temperature environments, improving the performance and reliability of the drain valve assembly compared to prior art drain valve assemblies without an air inlet valve. At the same time, by providing a solenoid valve, the situation in the prior art where the anti-freeze valve in a drain valve assembly without a solenoid valve always drains when fluid is flowing in the water inlet and outlet passages is avoided, thereby improving the performance and reliability of the drain valve assembly. [Brief explanation of the drawings]

[0023] 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.

[0024] [Figure 1] 1 shows a structural schematic diagram of a drain valve assembly provided in an example of the present application. [Figure 2] 2 shows a cross-sectional view of another view of the drain valve assembly of FIG. 1; [Figure 3] The structural schematic diagram of the connecting seat in FIG. 1 is shown. [Figure 4] 4 shows a cross-sectional view of the connecting seat of FIG. 3. [Figure 5] Figure 1 shows a schematic diagram of the intake valve seat structure. [Figure 6] Figure 1 shows a schematic diagram of the intake valve core structure. [Figure 7] Figure 1 shows a schematic diagram of the intake valve structure. [Figure 8] Figure 1 shows a schematic diagram of the structure of the anti-freeze valve. [Figure 9] The structural schematic diagram of the solenoid valve in Figure 1 is shown. [Figure 10] Figure 9 shows a schematic diagram of the structure of the solenoid valve core.

[0025] Here, the above drawings include the following reference numerals: 10 connecting seat, 11 water inlet / outlet passage, 12 solenoid valve passage, 121 second annular groove, 13 connection block, 14 intake valve joint, 15 anti-freeze valve joint, 16 water inlet / outlet joint, 17 intake valve passage, 171 fourth annular groove, 18 inclined passage, 19 anti-freeze valve passage, 191 third annular groove, 20 intake valve, 21 intake port, 22 intake valve seat, 23 intake valve core, 231 sealing head, 232 connection segment, 233 guide segment, 24 intake chamber, 25 exhaust port, 26 first sealing ring, 27 retaining ring, 281 first intake port, 282 second intake port, 283 flow passage, 30 anti-freeze valve, 31 drain passage, 32 drain port, 33 anti-freeze valve seat, 34 anti-freeze valve core, 35 thermostat, 36 elastic member, 40 solenoid valve, 41 spindle structure, 42 first flow port, 43 second flow port, 44 solenoid valve seat, 45 solenoid valve core, 46 movable iron core, 47 fixed iron core. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, the technical aspects of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. However, it is clear that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. The description of at least one exemplary embodiment below is merely explanatory in nature and does not impose any restrictions on the present application and its application or use. Based on the embodiments of the present application, all other embodiments that can be obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present application.

[0027] As shown in Figures 1 to 10, an embodiment of the present application provides a drain valve assembly including: a connecting seat 10 having a water inlet and outlet passage 11 and a solenoid valve passage 12, the solenoid valve passage 12 communicating with the water inlet and outlet passage 11; an intake valve 20 provided on the connecting seat 10, the intake valve 20 having an openable and closable intake port 21, and communicating the air inlet and outlet passages 11 when the intake port 21 is open; an anti-freeze valve 30 provided on the connecting seat 10, the anti-freeze valve 30 having a drain passage 31 and an openable and closable drain port 32, and communicating the drain port 32 with the drain passage 31 when the drain port 32 is open; and a solenoid valve 40 installed in the solenoid valve passage 12, the solenoid valve 40 being used to connect or disconnect the solenoid valve passage 12 and the drain passage 31.

[0028] In this embodiment, when the intake port 21 is closed, the connection between the intake port 21 and the water inlet / outlet passage 11 is blocked, and in this case, fluid flows in the water inlet / outlet passage 11, and the fluid in the water inlet / outlet passage 11 is not diverted by the intake valve 20. When the intake port 21 is open, the intake port 21 and the water inlet / outlet passage 11 are connected, and in this case, the flow of fluid in the water inlet / outlet passage 11 stops, and the remaining fluid in the water inlet / outlet passage 11 flows to the anti-freeze valve 30 due to the action of the intake valve 20. At the same time, when fluid is flowing in the water inlet / outlet passage 11, the water inlet / outlet passage 11 is blocked by the solenoid valve 40 and the drain passage 31, and when no fluid is flowing in the water inlet / outlet passage 11, the water inlet / outlet passage 11 is connected by the solenoid valve 40 and the drain passage 31. With this design, the provision of intake valve 20 transports residual fluid in the water inlet and outflow passages 11 to the anti-freeze valve 30 and then discharges it from the drain valve assembly without affecting the performance of the water inlet and outflow passages 11, thereby preventing the residual fluid in the water inlet and outflow passages 11 from freezing in low-temperature environments and improving the performance and reliability of the drain valve assembly compared to prior art drain valve assemblies without intake valve 20. At the same time, the provision of solenoid valve 40 prevents the anti-freeze valve 30 in prior art drain valve assemblies without solenoid valve 40 from always discharging fluid when fluid is flowing in the water inlet and outflow passages 11, improving the performance and reliability of the drain valve assembly.

[0029] Specifically, the water inlet and outlet passages 11 can be directly connected to the main fluid circuit without the need for separate flow guiding equipment such as drain pipes, thereby saving pipeline space; and at the same time, the drain valve assembly is connected to the main fluid circuit, which allows for better sensing of the water temperature in the main circuit, making the anti-freeze valve activation temperature more accurate, thereby achieving more accurate anti-freeze and drainage at low temperatures, and preventing water leakage and unintentional drainage by the solenoid valve 40 at high temperatures.

[0030] 1 and 2, the intake valve 20 is located above the water inlet and outlet passage 11, the anti-freeze valve 30 is located below the water inlet and outlet passage 11, and the drain port 32 is located at the lower end of the drain passage 31. With this design, the intake valve 20 can take in air from a relatively high position relative to the anti-freeze valve 30 and the water inlet and outlet passage 11, so that the negative pressure inside and outside the water inlet and outlet passage 11 becomes more pronounced and the intake valve 20 can transport the water in the water inlet and outlet passage 11 into the anti-freeze valve 30 more easily.

[0031] Furthermore, both the intake valve 20 and the anti-freeze valve 30 are installed vertically. This design improves the intake performance of the intake valve 20, increases the transport capacity of residual fluid in the water inlet / outlet passage 11, and improves the drainage efficiency of the drain valve assembly. Furthermore, installing the anti-freeze valve 30 vertically allows the fluid in the anti-freeze valve 30 to flow out under its own weight, improving the drainage performance of the anti-freeze valve 30.

[0032] Alternatively, the intake valve 20 and the anti-freeze valve 30 are arranged coaxially, which makes the structure of the drain valve assembly more compact, reduces the difficulty of processing, and further improves the drain efficiency of the drain valve assembly.

[0033] Specifically, the solenoid valve 40 is located below the water inlet and outlet passage 11, the solenoid valve 40 is located above the anti-freeze valve 30, and the solenoid valve 40 is installed horizontally. With this design, the solenoid valve 40 is located between the water inlet and outlet passage 11 and the anti-freeze valve 30, which makes better use of space, reduces the overall weight and height of the drain valve assembly, and does not affect the fluid flow within the water inlet and outlet passage 11. At the same time, the solenoid valve 40 can control whether the anti-freeze valve 30 communicates with or blocks the drain passage 31 and the water inlet and outlet passage 11, thereby improving the reliability of the drain valve assembly.

[0034] 3 and 4, the connecting seat 10 includes a connection block 13, an intake valve joint 14, an anti-freeze valve joint 15, and two water inlet and outlet joints 16, where the intake valve joint 14 is located above the connection block 13 and the anti-freeze valve joint 15 is located below the connection block 13, and the two water inlet and outlet joints 16 are located on opposite sides of the connection block 13, with the solenoid valve passage 12 located within the connection block 13, the intake valve 20 attached to the intake valve joint 14, the solenoid valve 40 attached to the connection block 13, and the anti-freeze valve 30 attached to the anti-freeze valve joint 15. With this design, the connecting seat 10 organically integrates the functions of the drain valve assembly, achieving functional integration and ensuring the reliability of the drain valve assembly. At the same time, the internal structure of the drain valve assembly is made more compact, eliminating the need to separately install the intake valve 20, the solenoid valve 40, etc., thereby reducing the corresponding assembly steps and processing costs of the drain valve assembly.

[0035] As shown in Figures 5 to 7, the intake valve 20 includes an intake valve seat 22 and an intake valve core 23. The intake valve seat 22 is connected to the connecting seat 10. The intake valve seat 22 has an intake port 21, an intake chamber 24, and an exhaust port 25 arranged in this order from top to bottom. The intake valve core 23 is arranged so that it can float up and down within the intake chamber 24. The exhaust port 25 is connected to the water inlet and outlet passages 11. When the intake port 21 is opened, the intake port 21, the intake chamber 24, and the exhaust port 25 are connected in this order.

[0036] In this embodiment, the intake valve 20 has a first intake hole 281, which is not only connected to the air outside the drain valve assembly, but also connected to the intake chamber 24 through the intake port 21. The up and down movement of the intake valve core 23 can open or close the intake port 21, and even realize the communication or blocking between the first intake hole 281 and the intake chamber 24.

[0037] Specifically, the outer wall of the intake valve core 23 and the inner wall of the intake chamber 24 are clearance - fitted. Taking the gravity of the intake valve core 23 as G, the downward fluid pressure received by the upper side of the intake valve core 23 as F1, and the upward fluid pressure received by the lower side of the intake valve core 23 as F2. Here, when F2 - F1>G, the intake valve core 23 closes the intake port 21; when F2 - F1<G, the intake valve core 23 opens the intake port 21. Designed in this way, due to the internal and external differential pressure received by the intake valve core 23, the movement of the intake valve core 23 is realized, and further, the opening and closing of the intake port 21 are controlled, improving the degree of automation of the drain valve assembly. And the intake valve 20 is vertically installed, and no other component forces are generated due to its own gravity G, so it is easier to open the intake valve 20, avoiding the situation where the intake valve 20 cannot be opened alone after closing or needs to be opened with the help of other equipment, improving the automation performance and reliability of the intake valve assembly.

[0038] Furthermore, the intake valve core 23 includes a sealing head 231, a connecting segment 232, and a guide segment 233 connected in sequence. The radial size of the guide segment 233 is larger than the radial sizes of the sealing head 231 and the connecting segment 232. The outer wall of the guide segment 233 and the inner wall of the intake chamber 24 are clearance - fitted. The sealing head 231 has a first annular groove, and the intake valve 20 further includes a first sealing ring 26. The first sealing ring 26 is provided in the first annular groove. When the intake port 21 is closed, the first sealing ring 26 and the sealing head 231 seal the intake port 21. Designed in this way, the clearance - fit between the guide segment 233 and the intake chamber 24 ensures the reliability of the movement of the intake valve core 23 within the intake valve seat 22, preventing the situation of displacement during the movement of the intake valve core 23. By providing the first sealing ring 26 to seal the intake port 21, the reliability of the seal is ensured.

[0039] Optionally, the intake valve 20 further includes a retaining ring 27, and an annular limiting groove is provided on one side of the intake chamber 24 close to the exhaust port 25, and the retaining ring 27 is provided in the annular limiting groove, and the inner diameter of the retaining ring 27 is smaller than the outer diameter of the valve core, and the lower end of the intake valve core 23 is retained and engaged with the retaining ring 27, thereby limiting the lowest position of the intake valve core 23 and preventing the intake valve core 23 from coming out of the intake valve seat 22, and ensuring the reliability of the intake valve 20.

[0040] Alternatively, the guide segment 233 has a flow passage 283, the connecting segment 232 of the intake valve core 23 has a second intake hole 282, the flow passage 283 is connected to the intake chamber by the second intake hole 282, the first intake hole 281 is provided in the intake valve seat 22, the first intake hole 281 is located above the intake port 21 and is connected to the intake port 21, and the flow area of ​​the first intake hole 281 is larger than the flow area of ​​the second intake hole 282, i.e., the flow capacity of the fluid passing through the first intake hole 281 is higher than the flow capacity of the fluid passing through the second intake hole 282. Specifically, immediately after the fluid in the water inlet / outlet passage 11 begins to flow, the fluid impacts the intake valve 20, which is in the open state, and then flows through the exhaust port 25 and enters the intake chamber 24, impacting the intake valve core 23. Some of the fluid passes through the second intake port 282, the intake port 21 and the first intake port 281 in sequence and is discharged from the drain valve assembly. Because the flow capacity of the first intake port 281 is higher than that of the second intake port 282, most of the fluid mainly impacts the intake valve core 23, and the upward fluid pressure F2 received by the lower side of the intake valve core 23 becomes greater than the sum of the downward fluid pressure F1 received by the upper side of the intake valve core 23 and the gravity G of the intake valve core 23 itself. Furthermore, the intake valve core 23 moves toward the intake port 21 due to the action of the fluid, and finally closes the intake valve 20. When the flow of fluid in the water inlet and outlet passage 11 is stopped, the upward fluid pressure F2 received by the lower side of the intake valve core 23 becomes smaller than the sum of the downward fluid pressure F1 received by the upper side of the intake valve core 23 and the gravity G of the intake valve core 23 itself, and the intake valve core 23 moves in a direction away from the intake port 21 due to the action of its own gravity G and the pressure difference between the upper and lower sides, thereby opening the intake port 21 and connecting the first intake hole 281, intake port 21, intake chamber 24, first intake hole 281 and circulation passage 283, thereby realizing open intake of the intake valve 20.

[0041] As shown in Figure 8, the anti-freeze valve 30 includes an anti-freeze valve seat 33, an anti-freeze valve core 34, and a thermostat 35, the drain passage 31 is provided in the anti-freeze valve seat 33, the drain port 32 is provided at one end of the anti-freeze valve seat 33, one end of the thermostat 35 is fastened and engaged with the anti-freeze valve core 34, and the thermostat 35 and the anti-freeze valve core 34 are both movably provided within the drain passage 31 so as to seal or open the drain port 32.

[0042] In this embodiment, the anti-freeze valve 30 includes an elastic member 36, which is fitted into the anti-freeze valve core 34, and both ends of the elastic member 36 abut against the anti-freeze valve core 34 and one side of the anti-freeze valve seat 33 that is close to the drain port 32. The thermostat 35 is movable in response to changes in ambient temperature, and when the ambient temperature is relatively high or normal, the thermostat 35 is heated and expands, moving against the anti-freeze valve 34 and toward the drain port 32 until it seals the drain port 32, in which case the elastic member 36 is compressed. When the ambient temperature is relatively low, the thermostat 35 cools and contracts, and the thermostat 35 contracts and moves toward one end away from the drain outlet 32, creating a gap between the thermostat 35 and the anti-freeze valve core 34. In this case, the elastic member 36 is stretched, pressing the anti-freeze valve core 34 toward the gap so that the anti-freeze valve core 34 opens the drain outlet 32.

[0043] As shown in Figures 9 and 10, the solenoid valve 40 includes a spindle structure 41, a first flow port 42 and a second flow port 43 that are connected to each other, the first flow port 42 is connected to the water inlet / outlet passage 11, and the second flow port 43 is connected to the drain passage 31 in an openable / closable manner, and the spindle structure 41 is movable along a direction approaching or moving away from the second flow port 43 so as to seal or open the second flow port 43.

[0044] In this embodiment, the solenoid valve 40 enables or blocks communication between the water inlet and outlet passage 11 and the anti-freeze valve 30. Specifically, when fluid is flowing in the water inlet and outlet passage 11, the spindle structure 41 seals the second flow port 43, preventing the fluid in the water inlet and outlet passage 11 from passing through the first flow port 42 and the second flow port 43 and entering the drain passage 31. When no fluid is flowing in the water inlet and outlet passage 11, the spindle structure 41 opens the second flow port 43 in combination with the open intake valve 20, allowing the fluid remaining in the water inlet and outlet passage 11 to pass through the first flow port 42 and the second flow port 43 and enter the drain passage 31, and then be discharged from the drain valve assembly, thereby preventing the remaining fluid in the water inlet and outlet passage 11 from freezing in a low-temperature environment and affecting the performance of the drain valve assembly.

[0045] Optionally, the solenoid valve 40 includes a solenoid valve seat 44 and a solenoid valve core 45, the solenoid valve core 45 is disposed through the solenoid valve seat 44, the spindle structure 41 is movably disposed within the solenoid valve core 45, and the solenoid valve 40 further includes a movable iron core 46 and a fixed iron core 47, and the second flow port 43 is sealed by the attraction between the movable iron core 46 and the fixed iron core 47.

[0046] As shown in Figures 3 and 4, the connecting seat further has an intake valve passage 17, an inclined passage 18 and an anti-freeze valve passage 19, where the intake valve passage 17 is used to install the intake valve 20, the solenoid valve passage 12 is used to install the solenoid valve 40, and the anti-freeze valve passage 19 is used to install the anti-freeze valve 30.

[0047] In this embodiment, the connecting seat is provided with an intake valve passage 17, a water inlet / outlet passage 11, a solenoid valve passage 12, and an anti-freeze valve passage 19. By installing corresponding valves in the corresponding passages, the functions of each valve are integrated into a single connecting seat, achieving functional integration and making the structure of the connecting seat connected to multiple different valves more compact and compact. Compared to the prior art, which required separate valves and main pipelines, this design in this embodiment reduces the number of processes, such as welding the circumscribing pipelines, and reduces processing and assembly costs. The inclined passage 18 connects the water inlet / outlet passage 11 and the solenoid valve passage 12, organically saving space on the connecting seat and making the structure more compact. Furthermore, this design allows the intake valve 20 in the intake valve passage 17 to discharge residual fluid from the water inlet / outlet passage 11 without affecting the normal flow of fluid within the passage, thereby preventing residual fluid from remaining in the passage. The solenoid valve 40 in the solenoid valve passage 12 controls the communication or blocking between the anti-freeze valve passage 19 and the solenoid valve passage 12, thereby avoiding a situation where the anti-freeze valve located in the anti-freeze valve passage 19 is constantly draining water during the use of the drain valve assembly.

[0048] Specifically, the intake valve passage 17 is located above the water inlet / outlet passage 11, and the solenoid valve passage 12 and the anti-freeze valve passage 19 are located below the water inlet / outlet passage 11. This design improves the intake performance of the intake valve installed in the intake valve passage 17 and improves the drainage efficiency of the drain valve assembly.

[0049] 3 and 4, the water inlet and outlet passages 11 are arranged horizontally, the intake valve passage 17 is arranged vertically, and the anti-freeze valve passage 19 is also arranged vertically. This design further improves the intake performance of the intake valve 20 located in the intake valve passage 17, and also increases the transport capacity for residual fluid in the water inlet and outlet passages 11, improving the drainage efficiency of the drain valve assembly. The vertical arrangement of the anti-freeze valve passage 19 allows the fluid in the anti-freeze valve 30 located in the anti-freeze valve passage 19 to flow out by its own weight, improving the drainage performance of the anti-freeze valve 30.

[0050] As shown in Figure 4, the solenoid valve passage 12 is located between the water inlet and outlet passage 11 and the anti-freeze valve passage 19, with the solenoid valve passage 12 arranged horizontally and the inclined passage 18 arranged at an angle relative to the horizontal. In this embodiment, the solenoid valve passage 12 is located between the water inlet and outlet passage 11 and the anti-freeze valve passage 19, which makes better use of space and does not affect the function of each valve in the drain valve assembly, while making the structure of the drain valve assembly more compact and reducing the overall weight and height of the drain valve assembly. Furthermore, the inclined passage 18 is arranged at an angle relative to the horizontal, which not only improves the fluid flow rate from the water inlet and outlet passage 11 to the solenoid valve passage 12, but also saves the overall space of the connecting seat.

[0051] Specifically, the intake valve passage 17 and the anti-freeze valve passage 19 are arranged coaxially, and the solenoid valve passage 12 is perpendicular to the water inlet / outlet passage 11. This design makes the structure of the drain valve assembly more compact, reduces the difficulty of processing, and further improves the drainage efficiency of the drain valve assembly.

[0052] 4, the inner wall of the intake valve passage 17 has a fourth annular groove 171, which is used to dispose a sealing ring. With this design, the sealing ring located in the fourth annular groove 171 provides a seal for the intake valve 20 installed in the intake valve passage 17, preventing the intake valve passage 17 from still having a gap communicating with the outside even after the intake valve 20 is installed, which would affect the performance of the intake valve.

[0053] Specifically, the inner wall of the solenoid valve passage 12 has a second annular groove 121, which is used to place a sealing ring. With this design, the sealing ring located in the second annular groove 121 can seal the solenoid valve 40 installed in the solenoid valve passage 12, preventing the fluid flowing from the water inlet and outlet passages 11 into the solenoid valve passage 12 from flowing out through the gap between the solenoid valve passage 12 and the solenoid valve 40, thereby ensuring the performance of the drain valve assembly.

[0054] Furthermore, the inner wall of the anti-freeze valve passage 19 has a third annular groove 191, which is used to place a sealing ring. With this design, the sealing ring located in the third annular groove 191 provides a seal for the anti-freeze valve 30 installed in the anti-freeze valve passage 19, preventing fluid that has flowed from the solenoid valve passage 12 into the anti-freeze valve passage 19 from flowing out through the gap between the anti-freeze valve passage 19 and the anti-freeze valve 30, and ensuring the performance of the drain valve assembly.

[0055] As shown in Figure 3, the connection seat includes a connection block 13, an intake valve joint 14, an anti-freeze valve joint 15, and two water inlet and outlet joints 16, where the intake valve joint 14 is arranged above the connection block 13, the anti-freeze valve joint 15 is arranged below the connection block 13, and the two water inlet and outlet joints 16 are arranged on opposite sides of the connection block 13, respectively, where the intake valve passage 17 is located within the intake valve joint 14 and the connection block 13, the water inlet and outlet passage 11 is located within the two water inlet and outlet joints 16 and the connection block 13, the inclined passage 18 and the solenoid valve passage 12 are located within the connection block 13, and the anti-freeze valve passage 19 is located within the anti-freeze valve joint 15 and the connection block 13. In this embodiment, the intake valve joint 14 is located above the connection block 13, thereby enabling the intake valve in the intake valve joint 14 to rapidly intake air into the anti-freeze valve 30 in the anti-freeze valve joint 15, and enabling rapid drainage of the anti-freeze valve 30 in the anti-freeze valve joint 15.

[0056] Specifically, the intake valve passage 17 has a female thread, the outer walls of the two water inlet and outlet joints 16 both have male threads, and the connecting seat is an integral structure. This design makes it easy to install the intake valve 20; specifically, the outer wall of the intake valve 20 has a male thread, and the intake valve 20 and the intake valve passage 17 are screwed together. The fact that the outer walls of the two water inlet and outlet joints 16 both have male threads makes it easy to connect the water inlet and outlet joints 16 to the circumscribed main pipeline. Furthermore, the integral structure of the connecting seat eliminates the need for additional pipeline installation work, facilitating centralized maintenance.

[0057] 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 within the protection scope of the present application.

Claims

1. a connecting seat (10) having a water inlet / outlet passage (11) and an electromagnetic valve passage (12), the electromagnetic valve passage (12) and the water inlet / outlet passage (11) being in communication with each other; an intake valve (20) provided on the connecting seat (10), the intake valve (20) having an intake port (21) that can be opened and closed, and when the intake port (21) is opened, the intake port (21) and the water inlet and outlet passages (11) are in communication with each other; an anti-freeze valve (30) provided on the connecting seat (10), the anti-freeze valve (30) having a drain passage (31) and an openable / closable drain outlet (32), and when the drain outlet (32) is opened, the drain outlet (32) and the drain passage (31) are in communication with each other; A drain valve assembly including: a solenoid valve (40) mounted in the solenoid valve passage (12), the solenoid valve (40) being used to connect or disconnect the solenoid valve passage (12) and the drain passage (31).

2. 2. The drain valve assembly of claim 1, wherein the intake valve (20) is located above the water inlet and outlet passage (11), the anti-freeze valve (30) is located below the water inlet and outlet passage (11), and the drain port (32) is located at the lower end of the drain passage (31).

3. The drain valve assembly of claim 1, wherein the intake valve (20) and the anti-freeze valve (30) are both vertically mounted.

4. 2. The drain valve assembly according to claim 1, wherein the solenoid valve (40) is located below the water inlet / outlet passage (11), the solenoid valve (40) is located above the anti-freeze valve (30), and the solenoid valve (40) is installed horizontally.

5. The connection seat (10) includes a connection block (13), an intake valve joint (14), an anti-freeze valve joint (15), and two water inlet and outlet joints (16), wherein the intake valve joint (14) is provided above the connection block (13), the anti-freeze valve joint (15) is provided below the connection block (13), and the two water inlet and outlet joints (16) are provided on opposite sides of the connection block (13), respectively; 2. The drain valve assembly of claim 1, wherein the solenoid valve passage (12) is located within the connection block (13), the intake valve (20) is attached to the intake valve joint (14), the solenoid valve (40) is attached to the connection block (13), and the anti-freeze valve (30) is attached to the anti-freeze valve joint (15).

6. 2. The drain valve assembly of claim 1, wherein the intake valve (20) includes an intake valve seat (22) and an intake valve core (23), the intake valve seat (22) is connected to the connecting seat (10), the intake valve seat (22) has the intake port (21), an intake chamber (24), and an exhaust port (25) arranged in this order from top to bottom, the intake valve core (23) is arranged in the intake chamber (24) so ​​as to be able to float up and down, the exhaust port (25) and the water inlet and outlet passages (11) are connected, and when the intake port (21) is opened, the intake port (21), the intake chamber (24), and the exhaust port (25) are connected in this order.

7. The outer wall of the intake valve core (23) and the inner wall of the intake chamber (24) are clearance-fitted, and the gravity of the intake valve core (23) is G, the downward fluid pressure received by the upper side of the intake valve core (23) is F1, and the upward fluid pressure received by the lower side of the intake valve core (23) is F2, where: When F2-F1>G, the intake valve core (23) closes the intake port (21); The drain valve assembly of claim 6, wherein the intake valve wick (23) opens the intake port (21) when F2-F1<G.

8. 7. The drain valve assembly of claim 6, wherein the intake valve core (23) includes a sealing head (231), a connecting segment (232), and a guide segment (233) connected in this order, the radial size of the guide segment (233) being larger than the radial sizes of the sealing head (231) and the connecting segment (232), a clearance fit between an outer wall of the guide segment (233) and an inner wall of the intake chamber (24), the sealing head (231) having a first annular groove, the intake valve (20) further including a first sealing ring (26), the first sealing ring (26) being disposed in the first annular groove, and the first sealing ring (26) and the sealing head (231) sealing the intake port (21) when the intake port (21) is closed.

9. 2. The drain valve assembly of claim 1, wherein the anti-freeze valve (30) includes an anti-freeze valve seat (33), an anti-freeze valve core (34), and a thermostat (35), the drain passage (31) is disposed within the anti-freeze valve seat (33), the drain port (32) is disposed at one end of the anti-freeze valve seat (33), one end of the thermostat (35) is fastened and engaged with the anti-freeze valve core (34), and the thermostat (35) and the anti-freeze valve core (34) are both movably disposed within the drain passage (31) to seal or open the drain port (32).

10. 2. The drain valve assembly of claim 1, wherein the solenoid valve (40) includes a spindle structure (41), a first flow port (42) and a second flow port (43) that are connected to each other, the first flow port (42) being connected to the water inlet / outlet passage (11), and the second flow port (43) being connected to the drain passage (31) in an openable / closable manner, and the spindle structure (41) is movable along a direction approaching or moving away from the second flow port (43) so as to seal or open the second flow port (43).

11. 2. The drain valve assembly according to claim 1, wherein the connecting seat further includes an intake valve passage (17), a sloped passage (18), and an anti-freeze valve passage (19), and the intake valve passage (17), the water inlet / outlet passage (11), the sloped passage (18), the solenoid valve passage (12), and the anti-freeze valve passage (19) are sequentially connected to each other, and the intake valve passage (17) is used to install the intake valve (20), and the anti-freeze valve passage (19) is used to install the anti-freeze valve (30).

12. 12. The drain valve assembly according to claim 11, wherein the intake valve passage (17) is located above the water inlet / outlet passage (11), and the solenoid valve passage (12) and the anti-freeze valve passage (19) are located below the water inlet / outlet passage (11).

13. 13. The drain valve assembly of claim 12, wherein the water inlet and outlet passages (11) are horizontally arranged, the air intake valve passages (17) are vertically arranged, and the anti-freeze valve passages (19) are vertically arranged.

14. 12. The drain valve assembly according to claim 11, wherein the solenoid valve passage (12) is located between the water inlet / outlet passage (11) and the anti-freeze valve passage (19), the solenoid valve passage (12) is arranged horizontally, and the inclined passage (18) is arranged inclined relative to the horizontal direction.

15. 14. The drain valve assembly according to claim 13, wherein the intake valve passage (17) and the anti-freeze valve passage (19) are arranged coaxially, and the solenoid valve passage (12) is perpendicular to the water inlet / outlet passage (11).

16. The inner wall of the intake valve passage (17) has a fourth annular groove (171), which is used to place a sealing ring; or The inner wall of the solenoid valve passage (12) has a second annular groove (121), which is used to place a sealing ring; or 12. The drain valve assembly according to claim 11, wherein the anti-freeze valve passage (19) has an inner wall having a third annular groove (191), the third annular groove (191) being used to place a sealing ring.

17. 6. The drain valve assembly according to claim 5, wherein the connecting seat further has an intake valve passage (17), the intake valve passage (17) is used to attach the intake valve (20), the intake valve passage (17) has an internal thread, and the outer walls of the two water inlet and outlet joints (16) both have external threads.

18. The drain valve assembly of claim 11 , wherein the connecting seat is of unitary construction.

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