Thermostatic valve

Abstract

This utility model provides a temperature control valve, belonging to the field of HVAC technology. It solves the problem of large size caused by not shutting down the boiler during radiator maintenance. It includes a valve body with an inlet, an outlet, a water passage chamber 1 and a water passage chamber 2 connecting to the inlet, and a connecting hole connecting the two water passage chambers. The water passage chamber 1 contains a valve core 1 and a control rod, and the water passage chamber 2 contains a valve core 2. The control rod can move axially to open or close the connecting hole. A valve seat 1 is threaded into the water passage chamber 1, and the side of the valve seat 1 has a water passage hole 1 communicating with the outlet. The valve core 1 is threaded into the valve seat 1 and has a through hole along the axial direction. The outer end of the control rod is inserted into the through hole, and the middle part of the control rod is threaded into the valve seat 1, forming several guide holes circumferentially between them. The guide holes are located axially between the connecting hole and the water passage hole 1. Movement of the valve core 1 can control the connection or disconnection between the water passage hole 1 and the guide holes. It has advantages such as small size.

Description

Technical Field

[0001] This utility model belongs to the field of heating, ventilation and air conditioning technology, and relates to temperature control valves. Background Technology

[0002] A thermostatic valve is a flow regulating valve used in heating systems. It regulates the flow rate of hot water in the heating pipes to adjust the temperature of the radiators. For example, the multifunctional composite radiator temperature control valve disclosed in patent application number 200520130196.2 includes an H-shaped valve body with left and right valve chambers. The right valve chamber has an axially aligned water supply inlet and outlet, and the left valve chamber has an axially aligned return water inlet and outlet. A conical connecting hole is provided between the left and right valve chambers. The right valve chamber is provided with a right flow hole that communicates with the water supply outlet end, and a temperature control regulating device is vertically installed on it. The temperature control regulating device contains a temperature control valve core that controls the water supply flow of the right flow hole. The left valve chamber is provided with a left flow hole that communicates with the return water inlet end, and an upper horizontal adjusting rod that adjusts the return water flow is vertically installed in it. The upper horizontal adjusting rod is screwed to the valve body. The return water outlet end of the left valve chamber is vertically provided with a lower horizontal adjusting rod that controls the opening and closing of the conical connecting hole, and the lower horizontal adjusting rod is screwed to the valve body. During normal operation, the conical connecting hole is closed by adjusting the lower horizontal rod. Hot water enters the right valve chamber through the supply inlet and flows into the radiator through the right flow hole and supply outlet. Water flowing out of the radiator enters the left valve chamber through the return inlet and flows back into the boiler through the left flow hole and return outlet. When the radiator needs maintenance, the right flow hole is closed by adjusting the temperature control valve core, and the left flow hole is closed by adjusting the upper horizontal rod. Then, the conical connecting hole is opened by adjusting the lower horizontal rod, connecting the left and right valve chambers. Water entering the right valve chamber through the supply inlet will directly enter the left valve chamber through the conical connecting hole and flow out through the return outlet. This setup allows the boiler to operate without shutting down when the radiator is being maintained.

[0003] However, the aforementioned multi-functional composite radiator temperature control valve also has its shortcomings: the lower horizontal adjusting rod is used to control the opening and closing of the conical connecting hole. The lower horizontal adjusting rod is parallel to the upper horizontal adjusting rod. The installation of the lower horizontal adjusting rod results in a relatively large volume of the entire multi-functional composite radiator temperature control valve, which occupies a lot of space during installation and will cause inconvenience. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a temperature control valve, which solves the problem of large size caused by the need to keep the boiler running during radiator maintenance.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A temperature control valve includes a valve body having an inlet 1, an outlet 1, an inlet 2, an outlet 2, a water passage chamber 1 connecting to inlet 1, a water passage chamber 2 connecting inlet 2 and outlet 2, and a connecting hole connecting water passage chamber 1 and water passage chamber 2. The water passage chamber 1 contains a valve core 1 and a control rod, and the water passage chamber 2 contains a valve core 2 capable of controlling the connection or disconnection between inlet 2 and outlet 2. The control rod can move axially to open or close the connecting hole at its inner end. The valve body is characterized in that the water passage chamber 1 is internally threaded with a valve seat 1 that is cylindrical and open at both ends. The side of the valve seat 1 is provided with… There is a water passage hole 1, which is connected to an outlet 1. A valve core 1 is cylindrical and threadedly connected to a valve seat 1. The valve core 1 has a through hole along the axial direction. The outer end of the control rod is inserted into the through hole through the inner end of the valve seat 1. The middle part of the control rod is threadedly connected to the valve seat 1, and several guide holes are formed circumferentially between the two. The guide holes are located between the connecting hole and the water passage hole 1 along the axial direction of the control rod. The movement of the valve core 1 can control the connection or disconnection between the water passage hole 1 and the guide holes. A leak-proof sealing ring is provided on the outer periphery of the outer end of the control rod. The leak-proof sealing ring abuts against the inner wall of the through hole.

[0007] Taking a water passage chamber 1 for hot water and water passage chamber 2 for return water as an example, during use, inlet 1 is connected to the heating pipe, outlet 1 is connected to the radiator's inlet, inlet 2 is connected to the radiator's return water, and outlet 2 is connected to the return water pipe. During normal radiator use, rotating the control lever moves it along the thread to its inner end, closing the connecting hole. This disconnects water passage chambers 1 and 2 within the valve body. Rotating valve core 1 moves it along the thread until water passage hole 1 connects with the guide hole. Controlling valve core 2 creates a connection between inlet 2 and outlet 2 within water passage chamber 2. Hot water flowing from the boiler enters water passage chamber 1 through inlet 1, flows through the guide holes into valve seat 1, and then flows into the radiator through water passage hole 1 and outlet 1. Water returning from the radiator flows out through inlet 2, water passage chamber 2, and outlet 2 into the return water pipe. When the radiator needs maintenance, first rotate valve core one to move it along the thread until it isolates water passage hole one from the guide hole. Then control valve core two to isolate inlet two from outlet two within water passage chamber two. Finally, rotate the control lever to move it along the thread until its inner end separates from the connecting hole, thus directly connecting water passage chamber one and water passage chamber two. Hot water flowing into water passage chamber one will flow directly into water passage chamber two through the connecting hole and out into the return water pipe, thereby ensuring that the boiler can be shut down without stopping.

[0008] This temperature control valve connects to a valve seat via an internal thread in the water passage chamber. The valve seat has a water passage hole on its side that communicates with the outlet. The valve core is cylindrical and threaded into the valve seat. This allows the valve core to control the connection between the inlet and outlet within the valve seat. As in existing technologies, it is not necessary to have a hole parallel to the communication hole in the valve body to cooperate with the valve core and control the connection or disconnection between the inlet and outlet. Furthermore, since the water passage hole is located on one side of the valve seat, opening a through hole along the axial direction on the valve core will not affect the normal function of the valve core. Based on this, the control rod is configured such that its outer end is inserted into the through hole of the valve core through the inner end of the valve seat, and the middle part of the control rod is threaded to the inner end of the valve seat, with several guide holes forming circumferentially between them. This allows the control rod to be integrated into the valve core while ensuring that the connecting hole can be opened or closed normally. Furthermore, the through hole is designed to allow the user to operate the control rod normally by inserting tools into the through hole. As a result, there is no need to set a separate position on the valve body for installing the control rod, which ensures that the boiler can be shut down without interruption during radiator maintenance, while reducing the overall size of the temperature control valve and thus reducing the space occupied by the temperature control valve during installation.

[0009] In the aforementioned temperature control valve, a mating part is provided on the outer periphery of the middle part of the control rod. The mating part is threadedly connected to the valve seat. The mating part includes at least two protrusions along the circumferential direction. The guide hole is formed by the inner peripheral wall of the valve seat and between two adjacent protrusions.

[0010] The aforementioned mating parts allow the control rod to form a threaded connection with the valve seat, and also allow several circumferential guide holes to be formed between the control rod and the valve seat for water passage, thus preventing water from being unable to flow into the valve seat due to the threaded connection of the control rod.

[0011] In the aforementioned temperature control valve, the valve seat has an annular stop shoulder, and the mating part and the valve core are located on both sides of the stop shoulder. The mating part can abut against one side of the stop shoulder as the control lever moves.

[0012] The stop shoulder can limit the movement distance of the control lever in the outward direction, preventing the control lever from rotating excessively and directly disengaging from the valve seat threaded connection.

[0013] In the aforementioned temperature control valve, the outer end of the control rod is provided with a non-circular connecting hole, the outer port of the through hole is hexagonal, and the cross-sectional area of ​​the connecting hole is smaller than the cross-sectional area of ​​the outer port of the through hole.

[0014] The outer port of the through hole is hexagonal, allowing users to insert an Allen wrench into the outer port to operate the valve core. The outer end of the control rod has a non-circular connecting hole with a cross-sectional area smaller than that of the outer port of the through hole. This allows users to insert tools into the connecting hole to operate the control rod without being restricted by the hexagonal shape of the through hole's outer port.

[0015] In the aforementioned temperature control valve, there are several water passage holes distributed circumferentially. An annular guide groove is formed between the valve seat and the inner wall of the water passage cavity. Each water passage hole is connected to the annular guide groove, and the outlet is connected to the annular guide groove.

[0016] By setting the above, the flow rate from valve seat one to outlet one can be increased, avoiding the impact on flow rate caused by the threaded connection of valve seat one in the water passage cavity one.

[0017] In the aforementioned temperature control valve, the valve core is threadedly connected to the valve seat along its axial center. The inner end of the valve core is provided with an annular mounting groove, and an annular sealing ring is provided in the annular mounting groove. The annular sealing ring abuts against the inner circumferential wall of the valve seat. When the water passage hole is separated from the guide hole, the annular sealing ring is located between the guide hole and the water passage hole along the axial direction of the control rod. When the water passage hole is connected to the guide hole, the water passage hole is located between the guide hole and the annular sealing ring along the axial direction of the control rod.

[0018] An annular seal is located at the inner end of the valve core. As the valve core moves along the thread, the position of the annular seal rotates. When the annular seal moves with the valve core to a position between the guide hole and the water passage hole along the axial direction of the control rod, it blocks the flow between them, preventing communication. However, when the valve core moves to a position between the guide hole and the annular seal along the axial direction of the control rod, the annular seal no longer blocks the flow between the guide hole and the water passage hole, allowing communication between them.

[0019] Compared with existing technologies, this thermostatic valve features a valve seat with a water passage hole on the internal threaded connection side of the water passage chamber. The water passage hole communicates with the outlet. The valve core is cylindrical and threadedly connected to the valve seat. This allows the valve core to control a position within the valve seat. Since the water passage hole is located on one side of the valve seat, opening a through hole along the axial direction on the valve core does not affect its normal function. Furthermore, the control rod is designed so that its outer end is inserted into the through hole of the valve core through the inner end of the valve seat. The middle part of the control rod is threadedly connected to the inner end of the valve seat, and several guide holes are formed circumferentially between them. This allows the control rod to be integrated into the valve core while ensuring the communication hole can be opened or closed normally. Therefore, there is no need to separately set up a position on the valve body for installing the control rod. This allows the boiler to remain running during radiator maintenance while reducing the overall size of the thermostatic valve and the space occupied during installation. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the temperature control valve.

[0021] Figure 2 This is a cross-sectional view of the mating part on the control rod and the valve seat in this temperature control valve.

[0022] Figure 3 This is a three-dimensional schematic diagram of the control lever in this temperature control valve.

[0023] In the diagram, 1. Valve body; 1a. Inlet 1; 1b. Outlet 1; 1c. Inlet 2; 1d. Outlet 2; 1e. Water passage chamber 1; 1f. Water passage chamber 2; 1g. Connecting hole; 2. Valve core 1; 2a. Through hole; 3. Control rod; 3a. Sealing part; 3b. Fitting part; 3b1. Protrusion; 3c. Connecting hole; 4. Valve core 2; 4a. Operating hole; 5. Water-blocking sealing ring; 6. Valve seat 1; 6a. Water passage hole 1; 6b. Stop shoulder; 7. Guide hole; 8. Leak-proof sealing ring; 9. Annular sealing ring 1; 10. Annular guide groove 1; 11. Baffle 1; 11a. Clearance through hole 1; 12. Valve seat 2; 12a. Water passage hole 2; 13. Annular sealing ring 2; 14. Annular guide groove 2; 15. Baffle 2; 15a. Clearance through hole 2. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figure 1As shown, the temperature control valve includes a valve body 1 with an inlet 1a, an outlet 1b, an inlet 2c, an outlet 2d, a water passage chamber 1e, a water passage chamber 2f, and a connecting hole 1g connecting the water passage chamber 1e and the water passage chamber 2f. The inlet 1a is connected to the water passage chamber 1e, and the outlet 2d is connected to the water passage chamber 2f. The outlet 1b and the inlet 2c are located on the same side of the valve body 1, and the inlet 1a and the outlet 2d are located on the same side of the valve body 1. The water passage chamber 1e is provided with a valve core 2 and a control rod 3. The water passage chamber 2f is provided with a valve core 4 that can control the opening or closing of its internal flow channel. The control rod 3 can move along its own axis to open or close the connecting hole 1g at its inner end. The inner end of the control rod 3 has a sealing part 3a, and the outer periphery of the sealing part 3a is provided with an annular sealing groove. A water-blocking sealing ring 5 is provided in the annular sealing groove. The sealing part 3a can be inserted into the connecting hole 1g so that the water-blocking sealing ring 5 abuts against the hole wall of the connecting hole 1g.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, specifically, a valve seat 6 with open ends is internally threaded into the water passage cavity 1e. The valve seat 6 has a water passage hole 6a on its side. The valve core 2 is cylindrical and threaded into the valve seat 6. The middle part of the control rod 3 is threaded into the inner end of the valve seat 6. Several guide holes 7 are provided circumferentially between the middle part of the control rod 3 and the inner circumferential wall of the valve seat 6. The guide holes 7 are located axially between the connecting hole 1g and the water passage hole 6a. The valve core 2 can rotate and move along the thread to control the connection or disconnection between the water passage hole 6a and the guide holes 7. The valve core 2 has a through hole 2a axially. The outer end of the control rod 3 is located within the through hole 2a. An annular leak-proof sealing ring 8 is provided on the outer circumference of the outer end of the control rod 3, and the leak-proof sealing ring 8 abuts against the inner wall of the through hole 2a. The valve core 2 is threadedly connected to the valve seat 6 at its axial center. An annular mounting groove is provided on the outer periphery of the inner end of the valve core 2, and an annular sealing ring 9 is provided within the annular mounting groove. The annular sealing ring 9 abuts against the inner circumferential wall of the valve seat 6. When the water passage hole 6a is separated from the guide hole 7, the annular sealing ring 9 is located between the guide hole 7 and the water passage hole 6a along the axial direction of the control rod 3. When the water passage hole 6a is connected to the guide hole 7, the water passage hole 6a is located between the guide hole 7 and the annular sealing ring 9 along the axial direction of the control rod 3. In this embodiment, a mating part 3b protrudes from the outer periphery of the middle part of the control rod 3. The mating part 3b is threadedly connected to the valve seat 6. The mating part 3b includes at least two protrusions 3b1 along the circumferential direction. The guide hole 7 is formed by the inner circumferential wall of the valve seat 6 and between two adjacent protrusions 3b1. The valve seat 6 has an annular stop shoulder 6b inside. The mating part 3b and the valve core 2 are located on both sides of the stop shoulder 6b. The mating part 3b can abut against one side of the stop shoulder 6b as the control rod 3 moves. The outer end of the control rod 3 is provided with a non-circular connecting hole 3c. There are several water passage holes 6a distributed circumferentially. An annular guide groove 10 is formed between the valve seat 6 and the inner wall of the water passage cavity 1e. Each water passage hole 6a is connected to the annular guide groove 10. The outlet 1b is connected to the annular guide groove 10. The outer end of the valve seat 6 extends out of the valve body 1 and is threadedly connected to a cover 11. The outer end of the cover 11 is provided with a clearance through hole 11a. The outer port of the through hole 2a is hexagonal.

[0027] like Figure 1As shown, a valve seat 12 with open ends is internally threaded into the water passage cavity 1f. A water passage hole 12a is provided on the side of the valve seat 12. The valve core 4 is cylindrical and threaded into the valve seat 12. The valve core 4 is threaded to the valve seat 12 along its axial direction at its center. An annular mounting groove 2 is provided on the outer circumference of the inner end of the valve core 4. An annular sealing ring 13 is provided within the annular mounting groove 2. The annular sealing ring 13 abuts against the inner circumferential wall of the valve seat 12. The annular sealing ring 13 is located between the water passage hole 12a and the connecting hole 1g. Movement of the valve core 4 can move the annular sealing ring 13 so that the water passage hole is located between the annular sealing ring 13 and the connecting hole 1g. The valve seat 12 has several water passage holes 12a distributed circumferentially. An annular guide groove 14 is formed between the valve seat 12 and the inner wall of the water passage cavity 1f. Each water passage hole 12a is connected to the annular guide groove 14. The inlet 1c is connected to the annular guide groove 14. The outer end of the valve core 4 is provided with an operating hole 4a. The outer port of the operating hole 4a is hexagonal. The outer end of the valve seat 12 extends out of the valve body 1 and is threadedly connected to a cover 15. The outer end of the cover 15 is provided with a clearance through hole 15a.

[0028] Taking the hot water passage chamber 1e as an example, during use, inlet 1a is connected to the hot water supply pipe, outlet 1b is connected to the radiator's inlet, inlet 1c is connected to the radiator's return water pipe, and outlet 1d is connected to the return water pipe. During normal radiator use, rotate control lever 3 until its sealing part 3a is inserted into the connecting hole 1g, causing the water-blocking sealing ring 5 to abut against the wall of the connecting hole 1g. This blocks the connecting hole 1g, preventing the hot water passage chamber 1e and hot water passage chamber 1f from communicating within the valve body 1. Then, rotate valve core 2 and valve core 4 to open water passage holes 6a and 12a. Hot water flowing from the boiler enters the hot water passage chamber 1e through inlet 1a, flows into valve seat 6 through each guide hole 7, and then flows into the radiator through water passage hole 6a, annular guide groove 10, and outlet 1b. The water flowing back from the radiator flows sequentially through inlet 1c, annular guide channel 14, water passage hole 12a, and the inner hole of valve seat 12 into water passage chamber 1f, and finally flows out from outlet 1d into the return water pipe.

[0029] When the radiator needs maintenance, first rotate valve core 2 until the annular sealing ring 9 is positioned between the guide hole 7 and the water passage hole 6a, so that the water passage hole 6a and the guide hole 7 are no longer connected. Then rotate valve core 4 until the annular sealing ring 13 is positioned between the water passage hole 12a and the connecting hole 1g, so that the water passage hole 12a and the water passage chamber 1f are no longer connected. Finally, rotate control lever 3 to separate its sealing part 3a from the connecting hole 1g, so that the water passage chamber 1e and the water passage chamber 1f are directly connected. The hot water flowing into the water passage chamber 1e will flow directly into the water passage chamber 1f through the connecting hole 1g and flow out into the return water pipe, thereby ensuring that the boiler can be shut down.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A temperature control valve, comprising a valve body (1) having an inlet (1a), an outlet (1b), an inlet (1c), an outlet (1d), a water passage chamber (1e) connecting the inlet (1a), a water passage chamber (1f) connecting the inlet (1c) and the outlet (1d), and a connecting hole (1g) connecting the water passage chamber (1e) and the water passage chamber (1f), wherein the water passage chamber (1e) is provided with a valve core (2) and a control rod (3), and the water passage chamber (1f) is provided with a valve core (4) capable of controlling the connection or disconnection of the inlet (1c) and the outlet (1d), and the control rod (3) is axially movable to open or close the connecting hole (1g) at its inner end, characterized in that, The water passage cavity (1e) is internally threaded with a valve seat (6) that is cylindrical with open ends. The side of the valve seat (6) is provided with a water passage hole (6a), which communicates with the outlet (1b). The valve core (2) is cylindrical and threadedly connected to the valve seat (6). The valve core (2) is provided with a through hole (2a) along the axial direction. The outer end of the control rod (3) is inserted into the through hole (2a) through the inner end of the valve seat (6). The middle part is threaded to the valve seat (6) and several guide holes (7) are formed circumferentially between them. The guide holes (7) are located between the connecting hole (1g) and the water passage hole (6a) along the axial direction of the control rod (3). The movement of the valve core (2) can control the connection or disconnection between the water passage hole (1g) and the guide holes (7). The outer peripheral side of the outer end of the control rod (3) is provided with a leak-proof sealing ring (8). The leak-proof sealing ring (8) abuts against the inner wall of the through hole (2a).

2. The thermostatic valve according to claim 1, characterized in that The control lever (3) has a mating part (3b) protruding from the outer periphery of the middle part. The mating part (3b) is threadedly connected to the valve seat (6). The mating part (3b) includes at least two protrusions (3b1) along the circumferential direction. The guide hole (7) is formed by the inner peripheral wall of the valve seat (6) and the two adjacent protrusions (3b1).

3. The temperature control valve according to claim 2, characterized in that, The valve seat (6) has an annular stop shoulder (6b). The mating part (3b) and the valve core (2) are located on both sides of the stop shoulder (6b). The mating part (3b) can abut against one side of the stop shoulder (6b) as the control rod (3) moves.

4. A thermostatic valve according to claim 1 or 2 or 3, characterised in that, The control rod (3) has a non-circular connecting hole (3c) at its outer end. The outer port of the through hole (2a) is hexagonal. The cross-sectional area of ​​the connecting hole (3c) is smaller than the cross-sectional area of ​​the outer port of the through hole (2a).

5. A thermostatic valve according to claim 1 or 2 or 3, characterised in that, The number of water passage holes (6a) is several and distributed circumferentially. An annular guide groove (10) is formed between the valve seat (6) and the inner wall of the water passage cavity (1e). Each water passage hole (6a) is connected to the annular guide groove (10), and the outlet (1b) is connected to the annular guide groove (10).

6. A thermostatic valve according to claim 5, characterised in that The valve core (2) is threaded to the valve seat (6) at its center along its axial direction. The inner end of the valve core (2) is provided with an annular mounting groove. An annular sealing ring (9) is provided in the annular mounting groove. The annular sealing ring (9) abuts against the inner circumferential wall of the valve seat (6). When the water passage hole (6a) is separated from the guide hole (7), the annular sealing ring (9) is located between the guide hole (7) and the water passage hole (6a) along the axial direction of the control rod (3). When the water passage hole (6a) is connected to the guide hole (7), the water passage hole (6a) is located between the guide hole (7) and the annular sealing ring (9) along the axial direction of the control rod (3).

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