Drain valve set

Abstract

A drain valve assembly is provided comprising: a connecting base (10) provided with a water inlet and outlet channel (11) and an electromagnetic valve channel (12), wherein the electromagnetic valve channel (12) is connected to the water inlet and outlet channel (11); an air inlet valve (20) arranged on the connecting base (10) and provided with an air inlet (21) that can be opened and closed, wherein, in the case where the air inlet (21) is open, the air inlet (21) is connected to the water inlet and outlet channel (11); a freeze protection valve (30) which is arranged at the connection base (10) and is provided with a drain channel (31) and a drain opening (32) which can be opened and closed, wherein in a case in which the drain opening (32) is open the drain opening (32) is connected to the drain channel (31);and the electromagnetic valve (40), which is installed in an electromagnetic valve seat (44) and is used to enable an electromagnetic valve channel (12) to communicate with or disconnect from the drain channel (31). The arrangement of the air inlet valve (20) directs residual fluid in the water inlet and outlet channel (11) to the freeze protection valve (30) for draining from the drain valve assembly, thus preventing a situation in which the residual fluid in the water inlet and outlet channel (11) freezes in a low-temperature environment; and the arrangement of the electromagnetic valve channel (12) prevents a situation in which the freeze protection valve (30) is constantly draining water whenever fluid is flowing in the water inlet and outlet channel (11), thereby improving the performance and reliability of the drain valve assembly.

Description

Drain valve group Technical Field

[0001] The present application relates to the technical field of drain valves, and in particular to a drain valve group. Background Art

[0002] At present, with the widespread application of drain valve groups, the requirements for the use of drain valve groups are becoming higher and higher. The antifreeze valve in the drain valve group in the existing technology may not drain completely after the drain valve group is used. When the drain valve group is in a low temperature environment, the undrained water may freeze; or the antifreeze valve may continue to drain water during the use of the drain valve group, causing the fluid flowing through the drain valve group to be diverted, affecting the normal use of the drain valve group.

[0003] Summary of the Invention

[0004] The present application provides a drain valve group to improve the performance and reliability of the drain valve group in the prior art.

[0005] In order to solve the above problems, the present application provides a drain valve group, including: a connecting seat, the connecting seat having an inlet and outlet water channel and a solenoid valve, the solenoid valve and the inlet and outlet water channel are connected; an air intake valve, arranged on the connecting seat, the air intake valve has an openable and closable air intake port, and when the air intake port is open, the air intake port is connected to the inlet and outlet water channel; an antifreeze valve, arranged on the connecting seat, the antifreeze valve has a drain channel and an openable and closable drain port, and when the drain port is open, the drain port is connected to the drain channel; a solenoid valve, installed in the solenoid valve, the solenoid valve is used to connect or disconnect the solenoid valve channel and the drain channel.

[0006] Furthermore, the air intake valve is located above the water inlet and outlet channels, the antifreeze valve is located below the water inlet and outlet channels, and the drain port is located at the lower end of the drain channel.

[0007] Furthermore, the air intake valve and the antifreeze valve are both arranged vertically.

[0008] Furthermore, the solenoid valve is located below the water inlet and outlet channels, the solenoid valve is located above the antifreeze valve, and the solenoid valve is arranged horizontally.

[0009] Furthermore, the connecting seat includes a connecting block, an air intake valve joint, an antifreeze valve joint and two inlet and outlet water joints, wherein the air intake valve joint is arranged above the connecting block, the antifreeze valve joint is arranged below the connecting block, and the two inlet and outlet water joints are respectively arranged on opposite sides of the connecting block; wherein, the solenoid valve is located in the connecting block, the air intake valve is installed on the air intake valve joint, the solenoid valve is installed on the connecting block, and the antifreeze valve is installed on the antifreeze valve joint.

[0010] Furthermore, the air intake valve includes an air intake valve seat and an air intake valve core, the air intake valve seat is connected to the connecting seat, the air intake valve seat has an air inlet, an air inlet cavity and an air outlet arranged in sequence from top to bottom, the air intake valve core can be arranged in the air inlet cavity to float up and down, and the air outlet is connected to the inlet and outlet water channels; wherein, when the air inlet is open, the air inlet, the air inlet cavity and the air outlet are connected in sequence.

[0011] Furthermore, the clearance between the outer wall of the intake valve core and the inner wall of the intake cavity is matched, the gravity of the intake valve core is G, the downward fluid pressure on the upper side of the intake valve core is F1, and the upward fluid pressure on the lower side of the intake valve core is F2. When F2-F1>G, the intake valve core closes the intake port; when F2-F1<G, the intake valve core opens the intake port.

[0012] Furthermore, the intake valve core includes a sealing head, a connecting section and a guide section connected in sequence. The radial dimension of the guide section is larger than the radial dimension of the sealing head and the connecting section. The outer wall of the guide section and the inner wall of the intake cavity are clearance-matched. The sealing head has a first annular groove. The intake valve also includes a first sealing ring, which is arranged in the first annular groove. When the air inlet is closed, the first sealing ring and the sealing head block the air inlet.

[0013] Furthermore, the antifreeze valve includes an antifreeze valve seat, an antifreeze valve core and a temperature bag. The drainage channel is arranged in the antifreeze valve seat, the drain port is arranged at one end of the antifreeze valve seat, one end of the temperature bag cooperates with the antifreeze valve core stopper, and the temperature bag and the antifreeze valve core can be movably arranged in the drainage channel to block or open the drain port.

[0014] Furthermore, the solenoid valve includes a valve needle structure and a first flow port and a second flow port that are interconnected. The first flow port is connected to the water inlet and outlet channels, and the second flow port is connected to the drainage channel in an openable and closable manner. The valve needle structure is movably arranged in a direction close to or away from the second flow port to block or open the second flow port.

[0015] Furthermore, the connecting seat also has an air intake valve channel, an oblique channel and an antifreeze valve channel. The air intake valve channel, the water inlet and outlet channels, the oblique channel, the solenoid valve channel and the antifreeze valve channel are connected in sequence, wherein the air intake valve channel is used to install the air intake valve, and the antifreeze valve channel is used to install the antifreeze valve.

[0016] Furthermore, the air intake valve channel is located above the water inlet and outlet channels, and the solenoid valve channel and the antifreeze valve channel are located below the water inlet and outlet channels.

[0017] Furthermore, the water inlet and outlet channels are arranged horizontally, the air intake valve channel is arranged vertically, and the antifreeze valve channel is arranged vertically.

[0018] Furthermore, the solenoid valve channel is located between the water inlet and outlet channels and the antifreeze valve channel, the solenoid valve channel is horizontally arranged, and the inclined channel is inclined relative to the horizontal direction.

[0019] Furthermore, the air intake valve channel and the antifreeze valve channel are coaxially arranged, and the solenoid valve channel is perpendicular to the water inlet and outlet channels.

[0020] Furthermore, the inner wall of the intake valve channel has a fourth annular groove, which is used to place the sealing ring; or, the inner wall of the solenoid valve channel has a second annular groove, which is used to place the sealing ring; or, the inner wall of the antifreeze valve channel has a third annular groove, which is used to place the sealing ring.

[0021] Furthermore, the connecting seat also has an air intake valve channel, which is used to install the air intake valve. The air intake valve channel has an internal thread, and the outer walls of the two inlet and outlet water joints both have external threads.

[0022] Furthermore, the connecting seat is an integrated structure.

[0023] The technical solution of the present application provides a drain valve assembly, comprising: a connecting seat having a water inlet and outlet channel and a solenoid valve, the solenoid valve and the water inlet and outlet channel being connected; an air inlet valve disposed on the connecting seat, the air inlet valve having an openable and closable air inlet, the air inlet and the water inlet and outlet channel being connected when the air inlet is open; an antifreeze valve disposed on the connecting seat, the antifreeze valve having a drain channel and an openable and closable drain outlet, the drain outlet and the drain channel being connected when the drain outlet is open; and a solenoid valve mounted within the solenoid valve, the solenoid valve being used to connect or disconnect the solenoid valve channel and the drain channel. With this solution, when the air inlet is closed, the air inlet and the water inlet and outlet channels are disconnected, allowing fluid in the water inlet and outlet channels to flow, and the fluid in the water inlet and outlet channels is not diverted by the air inlet valve. When the air inlet is open, the air inlet and the water inlet and outlet channels are connected, allowing air to enter the water inlet and outlet channels to balance the internal and external pressures, and residual fluid in the water inlet and outlet channels flows toward the antifreeze valve under the action of gravity. At the same time, when fluid is flowing in the inlet and outlet channels, the inlet and outlet channels are disconnected from the drain channel via the solenoid valve. When fluid is not flowing in the inlet and outlet channels, the inlet and outlet channels are connected to the drain channel via the solenoid valve. This arrangement, by providing an air inlet valve, allows residual fluid in the inlet and outlet channels to be transported to the antifreeze valve and then discharged from the drain valve assembly without affecting the performance of the inlet and outlet channels. Compared to drain valve assemblies without air inlet valves in the prior art, this prevents the residual fluid in the inlet and outlet channels from freezing in low-temperature environments, thereby improving the performance and reliability of the drain valve assembly. Furthermore, the provision of a solenoid valve prevents the antifreeze valve in prior art drain valve assemblies without solenoid valves from continuously draining when fluid is flowing in the inlet and outlet channels, thereby improving the performance and reliability of the drain valve assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0025] FIG1 shows a schematic structural diagram of a drain valve group provided in an embodiment of the present application;

[0026] FIG2 shows a cross-sectional view of the drain valve assembly of FIG1 from another perspective;

[0027] FIG3 shows a schematic structural diagram of the connecting base in FIG1 ;

[0028] FIG4 shows a cross-sectional view of the connecting base of FIG3 ;

[0029] FIG5 shows a schematic structural diagram of the intake valve seat of FIG1 ;

[0030] FIG6 shows a schematic structural diagram of the intake valve core of FIG1 ;

[0031] FIG7 shows a schematic structural diagram of the intake valve of FIG1 ;

[0032] FIG8 shows a schematic structural diagram of the antifreeze valve of FIG1 ;

[0033] FIG9 shows a schematic structural diagram of the solenoid valve of FIG1 ;

[0034] FIG10 shows a schematic structural diagram of the solenoid valve core of FIG9 .

[0035] The above drawings include the following reference numerals:

[0036] 10. Connecting seat; 11. Water inlet and outlet channels; 12. Solenoid valve channel; 121. Second annular groove; 13. Connecting block; 14. Inlet valve connector; 15. Antifreeze valve connector; 16. Water inlet and outlet connectors; 17. Inlet valve channel; 171. Fourth annular groove; 18. Oblique channel; 19. Antifreeze valve channel; 191. Third annular groove;

[0037] 20. Inlet valve; 21. Inlet port; 22. Inlet valve seat; 23. Inlet valve core; 231. Sealing head; 232. Connecting section; 233. Guide section; 24. Inlet cavity; 25. Outlet port; 26. First sealing ring; 27. Retaining ring; 281. First inlet hole; 282. Second inlet hole; 283. Flow channel;

[0038] 30. Antifreeze valve; 31. Drain channel; 32. Drain port; 33. Antifreeze valve seat; 34. Antifreeze valve core; 35. Temperature bulb; 36. Elastic part;

[0039] 40. Solenoid valve; 41. Valve needle structure; 42. First flow port; 43. Second flow port; 44. Solenoid valve seat; 45. Solenoid valve core; 46. Moving iron core; 47. Static iron core. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] As shown in Figures 1 to 10, an embodiment of the present application provides a drain valve group, including: a connecting seat 10, the connecting seat 10 has an inlet and outlet water channel 11 and a solenoid valve channel 12, and the solenoid valve channel 12 is connected to the inlet and outlet water channel 11; an air intake valve 20, arranged on the connecting seat 10, the air intake valve 20 has an openable and closable air intake port 21, and when the air intake port 21 is open, the air intake port 21 is connected to the inlet and outlet water channel 11; an antifreeze valve 30, arranged on the connecting seat 10, the antifreeze valve 30 has a drain channel 31 and an openable and closable drain port 32, and when the drain port 32 is open, the drain port 32 is connected to the drain channel 31; a solenoid valve 40, installed in the solenoid valve channel 12, the solenoid valve 40 is used to connect or disconnect the solenoid valve channel 12 and the drain channel 31.

[0042] In this embodiment, when the air inlet 21 is closed, the air inlet 21 and the water inlet and outlet channels 11 are disconnected. At this time, the fluid in the water inlet and outlet channels 11 flows, and the fluid in the water inlet and outlet channels 11 is not diverted by the air inlet valve 20. When the air inlet 21 is open, the air inlet 21 and the water inlet and outlet channels 11 are connected. At this time, the fluid in the water inlet and outlet channels 11 stops flowing, and the remaining fluid in the water inlet and outlet channels 11 flows toward the antifreeze valve 30 under the action of the air inlet valve 20. At the same time, when fluid is flowing in the water inlet and outlet channels 11, the water inlet and outlet channels 11 are disconnected from the drain channel 31 via the solenoid valve 40. When no fluid is flowing in the water inlet and outlet channels 11, the water inlet and outlet channels 11 are connected to the drain channel 31 via the solenoid valve 40. This arrangement, by providing the air inlet valve 20, allows residual fluid in the water inlet and outlet channels 11 to be transported to the antifreeze valve 30 and then discharged from the drain valve assembly without affecting the performance of the water inlet and outlet channels 11. Compared to prior art drain valve assemblies without the air inlet valve 20, this arrangement prevents the residual fluid in the water inlet and outlet channels 11 from freezing in low-temperature environments, thereby improving the performance and reliability of the drain valve assembly. Furthermore, the provision of the solenoid valve 40 prevents the antifreeze valve 30 in prior art drain valve assemblies without the solenoid valve 40 from continuously draining water even when fluid is flowing in the water inlet and outlet channels 11, thereby improving the performance and reliability of the drain valve assembly.

[0043] Specifically, the inlet and outlet water channels 11 can be directly connected to the main fluid circuit, eliminating the need for separate drainage pipes and other drainage equipment, saving pipeline space. At the same time, the drain valve group is connected to the main fluid circuit, which can better sense the water temperature of the main circuit, making the starting temperature of the antifreeze valve more accurate, and achieving more accurate antifreeze drainage at low temperatures, while preventing water leakage and accidental drainage through the solenoid valve 40 at high temperatures.

[0044] As shown in Figures 1 and 2 , the air intake valve 20 is located above the water inlet and outlet channels 11, the antifreeze valve 30 is located below the channels 11, and the drain port 32 is located at the lower end of the drain channel 31. This arrangement allows the air intake valve 20 to take in air from a higher position relative to the antifreeze valve 30 and the water inlet and outlet channels 11, resulting in a more pronounced negative pressure inside and outside the water inlet and outlet channels 11, making it easier for the air intake valve 20 to transfer water from the water inlet and outlet channels 11 to the antifreeze valve 30.

[0045] Furthermore, both the air intake valve 20 and the antifreeze valve 30 are arranged vertically. This arrangement improves the air intake performance of the air intake valve 20, thereby increasing the ability to transport residual fluid within the inlet and outlet channels 11 and enhancing the drainage efficiency of the drainage valve assembly. Furthermore, the vertical arrangement of the antifreeze valve 30 allows the fluid within the antifreeze valve 30 to flow out by its own weight, improving its drainage performance.

[0046] Optionally, the air intake valve 20 and the antifreeze valve 30 are coaxially arranged, which makes the structure of the drain valve group more compact, reduces the processing difficulty, and further improves the drainage efficiency of the drain valve group.

[0047] Specifically, the solenoid valve 40 is located below the water inlet and outlet channels 11 and above the antifreeze valve 30, with the solenoid valve 40 being arranged horizontally. This arrangement places the solenoid valve 40 between the water inlet and outlet channels 11 and the antifreeze valve 30, making better use of space and reducing the overall weight and height of the drain valve assembly. This ensures that the solenoid valve 40 controls the connection or disconnection between the drain channel 31 of the antifreeze valve 30 and the water inlet and outlet channels 11 without affecting the fluid flow within the water inlet and outlet channels 11, thereby improving the reliability of the drain valve assembly.

[0048] As shown in Figures 3 and 4, the connection base 10 includes a connection block 13, an air intake valve connector 14, an antifreeze valve connector 15, and two water inlet and outlet connectors 16. The air intake valve connector 14 is located above the connection block 13, the antifreeze valve connector 15 is located below the connection block 13, and the two water inlet and outlet connectors 16 are located on opposite sides of the connection block 13. The solenoid valve passage 12 is located within the connection block 13, the air intake valve 20 is mounted on the air intake valve connector 14, the solenoid valve 40 is mounted on the connection block 13, and the antifreeze valve 30 is mounted on the antifreeze valve connector 15. This arrangement, through the provision of the connection base 10, organically integrates the various functions of the drain valve assembly, achieving functional integration, ensuring the reliability of the drain valve assembly, and making the internal structure of the drain valve assembly more compact. Separate arrangements of the air intake valve 20 and solenoid valve 40 are no longer necessary, reducing the corresponding assembly steps and lowering the processing cost of the drain valve assembly.

[0049] As shown in Figures 5 to 7, the air intake valve 20 includes an air intake valve seat 22 and an air intake valve core 23. The air intake valve seat 22 is connected to the connecting seat 10. The air intake valve seat 22 has an air intake port 21, an air intake cavity 24 and an air outlet 25 arranged in sequence from top to bottom. The air intake valve core 23 can be arranged in the air intake cavity 24 to float up and down, and the air outlet 25 is connected to the inlet and outlet water channels 11; wherein, when the air intake port 21 is open, the air intake port 21, the air intake cavity 24 and the air outlet 25 are connected in sequence.

[0050] In this embodiment, the air intake valve 20 has a first air intake hole 281, which is connected to the air outside the drainage valve group and is connected to the air intake cavity 24 through the air intake port 21. The air intake port 21 can be opened or blocked by floating the air intake valve core 23 up and down, thereby realizing the connection or disconnection between the first air intake hole 281 and the air intake cavity 24.

[0051] Specifically, the outer wall of the intake valve core 23 and the inner wall of the intake chamber 24 form a clearance fit. The weight of the intake valve core 23 is G, the downward fluid pressure on the upper side of the intake valve core 23 is F1, and the upward fluid pressure on the lower side of the intake valve core 23 is F2. 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. This arrangement uses the internal and external pressure differentials acting on the intake valve core 23 to achieve movement of the intake valve core 23, thereby controlling the closing and opening of the intake port 21 and improving the automation level of the drain valve assembly. Furthermore, since the intake valve 20 is vertically positioned, its own weight G generates no other force components, making it easier to open the intake valve 20. This avoids situations where the intake valve 20 cannot open on its own after closing or requires assistance from other equipment, thereby improving the automation performance and reliability of the intake valve assembly.

[0052] Furthermore, the intake valve core 23 includes a sealing head 231, a connecting section 232, and a guide section 233, which are connected in sequence. The radial dimension of the guide section 233 is larger than that of the sealing head 231 and the connecting section 232. The outer wall of the guide section 233 is clearance-matched with the inner wall of the intake chamber 24. The sealing head 231 has a first annular groove. The intake valve 20 also includes a first sealing ring 26, which is disposed within 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. This arrangement, through the clearance fit between the guide section 233 and the intake chamber 24, ensures the reliable movement of the intake valve core 23 within the intake valve seat 22 and prevents the intake valve core 23 from deviating during movement. The provision of the first sealing ring 26 to seal the intake port 21 ensures reliable sealing.

[0053] Optionally, the intake valve 20 also includes a retaining ring 27. An annular limit groove is provided on the side of the intake cavity 24 close to the air outlet 25. The retaining ring 27 is arranged in the annular limit groove. The inner diameter of the retaining ring 27 is smaller than the outer diameter of the valve core. The lower end of the intake valve core 23 cooperates with the retaining ring 27 stopper to limit the lowest position of the intake valve core 23, prevent the intake valve core 23 from falling out of the intake valve seat 22, and ensure the reliability of the intake valve 20.

[0054] Optionally, a circulation channel 283 is provided in the guide section 233, and the connecting section 232 of the intake valve core 23 has a second intake hole 282. The circulation channel 283 is connected to the intake cavity through the second intake hole 282. The first intake hole 281 is provided on 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. The flow area of ​​the first intake hole 281 is greater than the flow area of ​​the second intake hole 282, that is, the flow capacity of the fluid passing through the first intake hole 281 is greater than the flow capacity of the fluid passing through the second intake hole 282. Specifically, when the fluid in the water inlet and outlet channels 11 just starts to flow, the fluid will impact the air inlet valve 20 in the open valve state, the fluid will flow through the air outlet 25 into the air inlet cavity 24 and impact the air inlet valve core 23, and a small portion of the fluid will be discharged from the drain valve group through the second air inlet hole 282, the air inlet 21 and the first air inlet hole 281 in sequence. Since the flow capacity of the first air inlet hole 281 is greater than the flow capacity of the second air inlet hole 282, most of the fluid mainly impacts the air inlet valve core 23, so that the upward fluid pressure F2 on the lower side of the air inlet valve core 23 is greater than the total of the downward fluid pressure F1 on the upper side of the air inlet valve core 23 and the air inlet valve core 23's own gravity G. and, thereby causing the intake valve core 23 to move toward the air inlet 21 under the action of the fluid, and finally closing the intake valve 20; when the fluid in the inlet and outlet water channels 11 stops flowing, the upward fluid pressure F2 on the lower side of the intake valve core 23 is less than the sum of the downward fluid pressure F1 on the upper side of the intake valve core 23 and the weight G of the intake valve core 23 itself. The intake valve core 23 moves away from the air inlet 21 under the action of its own weight G and the pressure difference between the upper and lower sides, thereby opening the air inlet 21, connecting the first air inlet hole 281, the air inlet 21, the air inlet cavity 24, the first air inlet hole 281 and the circulation channel 283, thereby realizing the opening of the valve of the intake valve 20 for air intake.

[0055] As shown in Figure 8, the antifreeze valve 30 includes an antifreeze valve seat 33, an antifreeze valve core 34 and a temperature bulb 35. The drainage channel 31 is arranged in the antifreeze valve seat 33, and the drain port 32 is arranged at one end of the antifreeze valve seat 33. One end of the temperature bulb 35 cooperates with the antifreeze valve core 34 stopper. The temperature bulb 35 and the antifreeze valve core 34 can be movably arranged in the drainage channel 31 to block or open the drain port 32.

[0056] In this embodiment, the antifreeze valve 30 includes an elastic member 36, which is mounted on the antifreeze valve core 34. The two ends of the elastic member 36 respectively abut the antifreeze valve core 34 and the antifreeze valve seat 33 on the side near the drain outlet 32. The thermal bulb 35 can move according to changes in the ambient temperature. When the ambient temperature is relatively hot or normal, the thermal bulb 35 expands due to heat, and the thermal bulb 35 moves against the antifreeze valve core 34 toward the drain outlet 32, until the drain outlet 32 ​​is blocked. At this time, the elastic member 36 compresses. When the ambient temperature is relatively low, the thermal bulb 35 contracts due to cold, and the thermal bulb 35 moves toward the end away from the drain outlet 32, forming a gap between the thermal bulb 35 and the antifreeze valve core 34. At this time, the elastic member 36 expands, pushing the antifreeze valve core 34 toward the gap, causing the antifreeze valve core 34 to open the drain outlet 32.

[0057] As shown in Figures 9 and 10, the solenoid valve 40 includes a valve needle structure 41 and 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 and outlet channels 11, and the second flow port 43 is connected to the drainage channel 31 in an openable and closable manner. The valve needle structure 41 is movably arranged in a direction close to or away from the second flow port 43 to block or open the second flow port 43.

[0058] In this embodiment, the solenoid valve 40 is used to connect or disconnect the water inlet and outlet channels 11 and the antifreeze valve 30. Specifically, when fluid flows in the water inlet and outlet channels 11, the valve needle structure 41 blocks the second flow port 43 to prevent the fluid in the water inlet and outlet channels 11 from entering the drainage channel 31 through the first flow port 42 and the second flow port 43; when no fluid flows in the water inlet and outlet channels 11, the valve needle structure 41 opens the second flow port 43, and combined with the open air intake valve 20, the fluid remaining in the water inlet and outlet channels 11 enters the drainage channel 31 through the first flow port 42 and the second flow port 43, and then is discharged from the drainage valve group, thereby avoiding the situation where the residual fluid in the water inlet and outlet channels 11 freezes in a low temperature environment and affects the performance of the drainage valve group.

[0059] Optionally, the solenoid valve 40 includes a solenoid valve seat 44 and a solenoid valve core 45. The solenoid valve core 45 is arranged through the solenoid valve seat 44. The valve needle structure 41 is movably arranged in the solenoid valve core 45. The solenoid valve 40 also includes a moving iron core 46 and a static iron core 47. The second flow port 43 is blocked by the attraction between the moving iron core 46 and the static iron core 47.

[0060] As shown in Figures 3 and 4, the connecting seat also has an intake valve channel 17, an inclined channel 18 and an antifreeze valve channel 19, wherein the intake valve channel 17 is used to install the intake valve 20, the solenoid valve channel 12 is used to install the solenoid valve 40, and the antifreeze valve channel 19 is used to install the antifreeze valve 30.

[0061] In this embodiment, by arranging the air intake valve channel 17, the water inlet and outlet channels 11, the solenoid valve channel 12 and the antifreeze valve channel 19 on the connecting seat, and installing corresponding valves on the corresponding channels, the functions of each valve are organically integrated on one connecting seat, thereby realizing functional integration, making the structure of the connecting seat connected to multiple different valves more compact and smaller. Compared with the situation in the prior art where each valve and the main line need to be arranged separately, this arrangement of the present scheme reduces the welding and other processes of the external pipeline, thereby reducing the processing and assembly costs; the water inlet and outlet channels 11 and the solenoid valve channel 12 are connected through the inclined channel 18, which more organically saves the space of the connecting seat and makes the structure more compact. Moreover, with such an arrangement, the air intake valve 20 of the air intake valve channel 17 realizes the discharge of the residual fluid in the water inlet and outlet channels 11 without affecting the normal flow of the fluid in the water inlet and outlet channels 11, thereby avoiding the situation where there is residual fluid in the water inlet and outlet channels 11; the solenoid valve 40 of the solenoid valve channel 12 realizes the control of the connection or disconnection between the antifreeze valve channel 19 and the solenoid valve channel 12, thereby avoiding the situation where the antifreeze valve at the position of the antifreeze valve channel 19 is always draining water during the use of the drain valve group.

[0062] Specifically, the air intake valve passage 17 is located above the water inlet and outlet passages 11, and the solenoid valve passage 12 and the antifreeze valve passage 19 are located below the water inlet and outlet passages 11. This arrangement improves the air intake performance of the air intake valve arranged in the air intake valve passage 17 and improves the drainage efficiency of the drainage valve group.

[0063] As shown in Figures 3 and 4 , the water inlet and outlet channels 11 are arranged horizontally, the air intake valve channel 17 is arranged vertically, and the antifreeze valve channel 19 is also arranged vertically. This arrangement further improves the air intake performance of the air intake valve 20 at the location of the air intake valve channel 17, thereby increasing the ability to transport residual fluid within the water inlet and outlet channels 11 and improving the drainage efficiency of the drain valve assembly. The vertical arrangement of the antifreeze valve channel 19 allows the fluid within the antifreeze valve 30 at the location of the antifreeze valve channel 19 to flow out by its own weight, improving the drainage performance of the antifreeze valve 30.

[0064] As shown in Figure 4, the solenoid valve channel 12 is located between the water inlet and outlet channels 11 and the antifreeze valve channel 19. The solenoid valve channel 12 is arranged horizontally, while the inclined channel 18 is tilted relative to the horizontal. In this embodiment, the solenoid valve channel 12 is located between the water inlet and outlet channels 11 and the antifreeze valve channel 19, which better utilizes space. This makes the drain valve assembly more compact while maintaining the functions of the individual valves in the drain valve assembly, reducing its overall weight and height. Furthermore, the inclined channel 18 relative to the horizontal not only improves the fluid flow from the water inlet and outlet channels 11 to the solenoid valve channel 12, but also saves space in the connector.

[0065] Specifically, the air intake valve channel 17 and the antifreeze valve channel 19 are coaxially arranged, and the solenoid valve channel 12 is perpendicular to the water inlet and outlet channels 11. This arrangement makes the drain valve group structure more compact, reduces the processing difficulty, and further improves the drainage efficiency of the drain valve group.

[0066] As shown in Figure 4 , the inner wall of the intake valve passage 17 has a fourth annular groove 171 for receiving a sealing ring. This arrangement, through the sealing ring positioned in the fourth annular groove 171 , seals the intake valve 20 installed within the intake valve passage 17 , preventing a gap in the intake valve passage 17 from remaining in communication with the outside after the intake valve 20 is installed, thereby affecting the performance of the intake valve.

[0067] Specifically, the inner wall of the solenoid valve channel 12 has a second annular groove 121 for receiving a sealing ring. This arrangement, through the sealing ring located in the second annular groove 121, seals the solenoid valve 40 installed within the solenoid valve channel 12, preventing fluid flowing into the solenoid valve channel 12 from the water inlet and outlet channels 11 from escaping through the gap between the solenoid valve channel 12 and the solenoid valve 40, thereby ensuring the performance of the drain valve assembly.

[0068] Furthermore, the inner wall of the antifreeze valve passage 19 has a third annular groove 191 for receiving a sealing ring. This arrangement, through the sealing ring located in the position of the third annular groove 191, seals the antifreeze valve 30 installed in the antifreeze valve passage 19, preventing the fluid flowing into the antifreeze valve passage 19 through the solenoid valve passage 12 from escaping through the gap between the antifreeze valve passage 19 and the antifreeze valve 30, thereby ensuring the performance of the drain valve assembly.

[0069] As shown in FIG3 , the connection base includes a connection block 13, an air intake valve connector 14, an antifreeze valve connector 15, and two water inlet and outlet connectors 16. The air intake valve connector 14 is located above the connection block 13, the antifreeze valve connector 15 is located below the connection block 13, and the two water inlet and outlet connectors 16 are located on opposite sides of the connection block 13. The air intake valve passage 17 is located within the air intake valve connector 14 and the connection block 13, the water inlet and outlet passages 11 are located within the two water inlet and outlet connectors 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 antifreeze valve passage 19 is located within the antifreeze valve connector 15 and the connection block 13. In this embodiment, the air intake valve connector 14 is located above the connection block 13, which enables the air intake valve within the air intake valve connector 14 to quickly supply air to the antifreeze valve 30 within the antifreeze valve connector 15, and enables rapid drainage of water from the antifreeze valve 30 within the antifreeze valve connector 15.

[0070] Specifically, the air inlet valve passage 17 has internal threads, while the outer walls of both water inlet and outlet joints 16 have external threads, creating a single-piece connection base. This arrangement facilitates installation of the air inlet valve 20. Specifically, the outer walls of the air inlet valve 20 have external threads, threadedly connecting the air inlet valve 20 to the air inlet valve passage 17. Both water inlet and outlet joints 16 also have external threads on their outer walls, facilitating connection between the water inlet and outlet joints 16 and the external main line. Furthermore, the single-piece connection base eliminates the need for redundant piping installation, facilitating centralized maintenance.

[0071] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A drainage valve group, characterized in that: include: A connecting seat (10), the connecting seat (10) having an inlet and outlet water channel (11) and an electromagnetic valve channel (12), the electromagnetic valve channel (12) and the inlet and outlet water channel (11) being in communication; An air intake valve (20) is arranged on the connecting seat (10), and the air intake valve (20) has an openable and closable air intake port (21). When the air intake port (21) is open, the air intake port (21) and the water inlet and outlet channel (11) are in communication; an antifreeze valve (30) disposed on the connecting seat (10), the antifreeze valve (30) comprising a drainage channel (31) and an openable and closable drainage port (32), wherein the drainage port (32) and the drainage channel (31) are in communication when the drainage port (32) is open; A solenoid valve (40) is installed in the solenoid valve channel (12), and the solenoid valve (40) is used to connect or disconnect the solenoid valve channel (12) and the drainage channel (31).

2. The drain valve assembly according to claim 1, characterized in that: The air inlet valve (20) is located above the water inlet and outlet channel (11), the antifreeze valve (30) is located below the water inlet and outlet channel (11), and the drain port (32) is located at the lower end of the drain channel (31).

3. The drain valve assembly according to claim 1, characterized in that: The air intake valve (20) and the antifreeze valve (30) are both arranged vertically.

4. The drain valve assembly according to claim 1, characterized in that: The solenoid valve (40) is located below the water inlet and outlet channel (11), the solenoid valve (40) is located above the antifreeze valve (30), and the solenoid valve (40) is arranged horizontally.

5. The drain valve assembly according to claim 1, characterized in that: The connecting seat (10) comprises a connecting block (13), an air intake valve joint (14), an antifreeze valve joint (15) and two water inlet and outlet joints (16), wherein the air intake valve joint (14) is arranged above the connecting block (13), the antifreeze valve joint (15) is arranged below the connecting block (13), and the two water inlet and outlet joints (16) are respectively arranged on opposite sides of the connecting block (13); The solenoid valve channel (12) is located in the connecting block (13), the air intake valve (20) is mounted on the air intake valve connector (14), the solenoid valve (40) is mounted on the connecting block (13), and the antifreeze valve (30) is mounted on the antifreeze valve connector (15).

6. The drain valve assembly according to claim 1, characterized in that: The air intake valve (20) comprises an air intake valve seat (22) and an air intake valve core (23); the air intake valve seat (22) is connected to the connecting seat (10); the air intake valve seat (22) has an air intake port (21), an air intake cavity (24), and an air outlet (25) arranged in sequence from top to bottom; the air intake valve core (23) can be arranged in the air intake cavity (24) in a floating manner; the air outlet (25) is connected to the water inlet and outlet channel (11); wherein, when the air intake port (21) is opened, the air intake port (21), the air intake cavity (24), and the air outlet (25) are connected in sequence.

7. The drain valve assembly according to claim 6, characterized in that: The outer wall of the intake valve core (23) and the inner wall of the intake cavity (24) are clearance-matched, the gravity of the intake valve core (23) is G, the downward fluid pressure on the upper side of the intake valve core (23) is F1, and the upward fluid pressure on the lower side of the intake valve core (23) is F2, wherein: When F2-F1>G, the air intake valve core (23) closes the air intake port (21); When F2-F1<G, the intake valve core (23) opens the intake port (21).

8. The drain valve assembly according to claim 6, characterized in that: The air intake valve core (23) includes a sealing head (231), a connecting section (232) and a guide section (233) connected in sequence. The radial dimension of the guide section (233) is larger than the radial dimensions of the sealing head (231) and the connecting section (232). The outer wall of the guide section (233) and the inner wall of the air intake cavity (24) are clearance-matched. The sealing head (231) has a first annular groove. The air intake valve (20) also includes a first sealing ring (26). The first sealing ring (26) is arranged in the first annular groove. When the air intake port (21) is closed, the first sealing ring (26) and the sealing head (231) block the air intake port (21).

9. The drain valve assembly according to claim 1, characterized in that: The antifreeze valve (30) comprises an antifreeze valve seat (33), an antifreeze valve core (34) and a temperature package (35); the drainage channel (31) is arranged in the antifreeze valve seat (33); the drainage port (32) is arranged at one end of the antifreeze valve seat (33); one end of the temperature package (35) is engaged with a stopper of the antifreeze valve core (34); the temperature package (35) and the antifreeze valve core (34) are both movably arranged in the drainage channel (31) to block or open the drainage port (32).

10. The drain valve assembly according to claim 1, characterized in that: The solenoid valve (40) includes a valve needle structure (41) and a first flow port (42) and a second flow port (43) that are connected to each other, wherein the first flow port (42) is connected to the water inlet and outlet channels (11), and the second flow port (43) is openably connected to the drainage channel (31), and the valve needle structure (41) is movably arranged in a direction close to or away from the second flow port (43) to block or open the second flow port (43).

11. The drain valve assembly according to claim 1, characterized in that: The connecting seat further comprises an air intake valve channel (17), an oblique channel (18) and an antifreeze valve channel (19); the air intake valve channel (17), the water inlet and outlet channels (11), the oblique channel (18), the solenoid valve channel (12) and the antifreeze valve channel (19) are sequentially connected, wherein the air intake valve channel (17) is used to install the air intake valve (20), and the antifreeze valve channel (19) is used to install the antifreeze valve (30).

12. The drain valve assembly according to claim 11, characterized in that: The air intake valve channel (17) is located above the water inlet and outlet channels (11), and the solenoid valve channel (12) and the antifreeze valve channel (19) are located below the water inlet and outlet channels (11).

13. The drain valve assembly according to claim 12, characterized in that: The water inlet and outlet channels (11) are arranged horizontally, the air intake valve channel (17) is arranged vertically, and the antifreeze valve channel (19) is arranged vertically.

14. The drain valve assembly according to claim 11, characterized in that: The solenoid valve channel (12) is located between the water inlet and outlet channels (11) and the antifreeze valve channel (19), the solenoid valve channel (12) is arranged horizontally, and the inclined channel (18) is arranged inclined relative to the horizontal direction.

15. The drain valve assembly according to claim 13, characterized in that: The air intake valve channel (17) and the antifreeze valve channel (19) are coaxially arranged, and the solenoid valve channel (12) is perpendicular to the water inlet and outlet channels (11).

16. The drain valve assembly according to claim 11, characterized in that: The inner wall of the intake valve channel (17) has a fourth annular groove (171), and the fourth annular groove (171) is used to place a sealing ring; or, The inner wall of the solenoid valve channel (12) has a second annular groove (121), and the second annular groove (121) is used to place a sealing ring; or, The inner wall of the antifreeze valve channel (19) has a third annular groove (191), and the third annular groove (191) is used to place a sealing ring.

17. The drain valve assembly according to claim 5, characterized in that: The connecting seat also has an air intake valve channel (17), and the air intake valve channel (17) is used to install the air intake valve (20). The air intake valve channel (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 according to claim 11, characterized in that: The connecting seat is an integrated structure.

Images