Hydronic temperature control valve

Abstract

The utility model provides a warm control valve belongs to the technical field of warm, it has solved the problem that user is easy to take off the adjusting knob directly from the valve body. It includes the valve body that has the overheat water hole inside, the temperature control valve core that sets up in the valve body, the valve cover that is screwed in the valve body outside and the adjusting knob that is screwed in the valve cover outer end portion, the temperature control valve core includes the control rod that can block or open the overheat water hole and the spring that acts on the control rod and makes it far from the overheat water hole, the outer end portion of valve cover is equipped with the through -hole, the inside of adjusting knob has the cylindrical abutting part that passes through the through -hole and abuts against the outer end of control rod, the outer end port in through -hole is equipped with annular shoulder, the outer circumferential side of cylindrical abutting part is equipped with annular installation groove near the inner end position, annular installation groove is equipped with annular blocking piece, blocking piece is protruding from annular installation groove along the circumference, adjusting knob can move to blocking piece and annular shoulder abut against each other towards its outer end direction. It has the advantages such as can prevent the adjusting knob from turning down from the valve body.

Description

Technical Field

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

[0002] Thermostatic valves are used on radiators to connect them to the heating system. For example, the multi-functional composite radiator thermostatic valve with 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, while the left valve chamber has an axially aligned return water inlet and outlet. A conical connecting hole is formed between the left and right valve chambers. The right valve chamber has a right flow hole communicating with the water supply outlet, and a temperature control regulating device is vertically mounted on it. The temperature control regulating device contains a thermostatic valve core that controls the water flow rate through the right flow hole. This temperature control regulating device can be a manual or automatic adjustment knob. (See attached instruction manual.) Figure 1 The diagram illustrates the specific structure of the temperature control device when it is a manual adjustment knob. This knob is threaded onto the valve body, and its inner side abuts against a control lever within the temperature control valve core. When the temperature is too high, the user rotates the knob to move the control lever, reducing the amount of hot water flowing into the right flow orifice. Conversely, when the temperature is too low, the user rotates the knob in the opposite direction. A spring within the temperature control valve core acts on the control lever, causing it to move along with the knob under the spring's influence, thereby increasing the amount of hot water flowing into the right flow orifice.

[0003] However, the aforementioned multi-functional composite radiator thermostatic valve also has its shortcomings: the manual adjustment knob is simply threaded onto the valve body, and moving the adjustment knob toward its outer end increases the hot water flow. However, the user cannot directly know from the outside whether the hot water flow has reached its maximum value, which can easily lead to the user turning the adjustment knob continuously and then directly removing it from the valve body. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a heating and ventilation temperature control valve. It solves the problem that users cannot determine when the hot water flow reaches its maximum, which easily leads to the adjustment knob being removed directly from the valve body.

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

[0006] A heating, ventilation, and air conditioning (HVAC) thermostatic valve includes a valve body with an internal hot water outlet, a thermostatic valve core housed within the valve body, a valve cover threaded onto the valve body, and an adjustment knob threaded onto the outer end of the valve cover. The thermostatic valve core includes a control rod capable of moving axially to block or open the hot water outlet, and a spring acting on the control rod to move it away from the hot water outlet. The outer end of the valve cover has a through hole, and the inner side of the adjustment knob has a columnar abutment passing through the through hole. The outer end of the control rod abuts against the columnar abutment. The valve is characterized in that an annular shoulder is provided inside the outer port of the through hole, and an annular mounting groove is provided on the outer periphery of the columnar abutment near its inner end. An annular blocking member is provided within the annular mounting groove, protruding circumferentially from the annular mounting groove. The adjustment knob can move towards its outer end until the blocking member abuts against the annular shoulder.

[0007] Similar to existing systems, this HVAC thermostatic valve regulates the flow of hot water to adjust the radiator temperature by rotating an adjustment knob. For example, when the radiator temperature is too high, rotating the adjustment knob moves it inward, causing the control lever to move towards the hot water outlet via the inner columnar abutment. When the radiator temperature is too low, rotating the adjustment knob moves it outward, causing the control lever to move away from the hot water outlet under the spring force. Similarly, rotating the valve stem adjusts the flow rate of return water entering the return pipe.

[0008] This HVAC thermostatic valve features an annular shoulder inside the outer port of the through-hole and an annular mounting groove near the inner end on the outer periphery of the columnar abutment. An annular blocking element protrudes circumferentially from the annular mounting groove within the groove, thus limiting the maximum outward movement of the adjustment knob. This prevents the knob from being accidentally turned off the valve body due to excessive rotation by the user. Furthermore, the user can also know that the hot water orifice has been adjusted to its maximum opening when the blocking element abuts against the annular shoulder, preventing further outward movement of the adjustment knob.

[0009] In the aforementioned HVAC temperature control valve, the blocking component is a steel wire retaining ring, and the outer side of the annular shoulder is a tapered guide surface. The inner diameter of the guide surface gradually increases from the inner end to the outer end of the valve cover. The inner diameter of the steel wire retaining ring in its natural state is larger than the bottom diameter of the annular mounting groove.

[0010] During installation, first place the wire retaining ring in the annular mounting groove, then thread the adjusting knob onto the valve cover. The cylindrical abutment on the adjusting knob will pass through the through hole. To prevent the presence of the wire retaining ring and the annular shoulder from obstructing the cylindrical abutment from passing through the through hole, the inner diameter of the wire retaining ring in its natural state is set to be larger than the bottom diameter of the annular mounting groove (i.e., the diameter of the circle containing the bottom of the annular mounting groove), providing the wire retaining ring with space to contract from its opening. At the same time, the outer surface of the annular shoulder is set as a tapered guide surface, with the inner diameter of the guide surface gradually increasing from the inner end to the outer end of the valve cover. In this way, when the cylindrical abutment passes through the through hole, the guide surface will squeeze the wire retaining ring, causing the wire retaining ring to contract and smoothly squeeze through the annular shoulder.

[0011] In the aforementioned HVAC thermostatic valve, the maximum inner diameter of the guide surface is larger than the diameter of the through hole, and the outer diameter of the wire retaining ring in its natural state matches the diameter of the through hole.

[0012] After the wire retaining ring passes over the annular shoulder, it expands under its own elastic force. Setting the outer diameter of the wire retaining ring in its natural state to match the diameter of the through hole ensures that it firmly rests against the annular shoulder, limiting further movement of the adjusting knob towards its outer end. As mentioned above, the inner diameter of the wire retaining ring in its natural state is larger than the bottom diameter of the annular mounting groove, and its outer diameter in its natural state matches the diameter of the through hole. Therefore, setting the maximum inner diameter of the guide surface to be larger than the inner diameter of the through hole ensures that the wire retaining ring can be more smoothly inserted into the guide surface when the adjusting knob is threaded onto the valve cover.

[0013] In the aforementioned HVAC thermostatic valve, the inner end of the columnar abutment has a tapered guide surface, and the outer diameter of the guide surface gradually increases from the inner end to the outer end of the adjustment knob.

[0014] When threading the adjusting knob onto the valve cover, the wire retaining ring must first be installed into the annular mounting groove of the adjusting knob. During installation, place the adjusting knob on a horizontal surface with the inner end of the cylindrical abutment facing upwards. Then, place the wire retaining ring on the tapered guide surface of the inner end of the cylindrical abutment. Use a tool to push the wire retaining ring downwards; the guide surface will cause the wire retaining ring to expand outwards until it reaches the annular mounting groove. At this point, the wire retaining ring will retract under its own elasticity, ensuring its inner end is within the annular mounting groove. This setup significantly improves the ease of installing the wire retaining ring onto the adjusting knob.

[0015] In the aforementioned HVAC thermostatic valve, the valve body also has a return water hole. The valve body has a hot water inlet and a hot water outlet that are both connected to the hot water hole, and a return water inlet and a return water outlet that are both connected to the return water hole. The valve body is threadedly connected to a valve seat with an inner hole. The inner end of the valve seat is located inside the valve body. The valve seat is threadedly connected to a valve stem. The inner end of the valve stem has a sealing head that extends out of the valve seat. The movement of the valve stem can cause the sealing head to open or close the return water hole. A water-proof sealing ring is provided on the outer side of the middle part of the valve stem along the axial direction. The water-proof sealing ring abuts against the inner wall of the valve seat. The valve stem can move towards its outer end until the sealing head abuts against the inner end of the valve seat.

[0016] In practical use, this HVAC thermostatic valve is connected to the radiator inlet via the hot water outlet and to the radiator outlet via the return water inlet. The hot water inlet and return water outlet are then connected to the hot water pipe and return water pipe in the heating system, respectively. With the hot water inlet and return water inlet open, hot water flows from the hot water inlet, through the hot water inlet and outlet, into the radiator. Return water flowing from the radiator flows through the return water inlet, through the return water inlet and outlet, into the return water pipe.

[0017] The adjusting knob, control lever, and spring regulate the hot water flow, while the valve stem regulates the return water flow into the return pipe. A water-resistant sealing ring forms a seal between the valve stem and the valve seat. When the valve stem moves outward to fully open the return water hole, the sealing head of the valve stem abuts against the inner end of the valve seat, creating a double seal: the water-resistant sealing ring provides the primary seal, and the abutment between the sealing head and the inner end of the valve seat provides the secondary seal, thus improving the sealing effect.

[0018] Compared with existing technologies, this HVAC thermostatic valve features an annular shoulder inside the outer port of the through hole and an annular mounting groove near the inner end on the outer periphery of the columnar abutment. An annular blocking element is installed inside the annular mounting groove, protruding circumferentially outside the groove. This limits the maximum movement distance of the adjustment knob in the outward direction, preventing the knob from being turned off the valve body due to excessive rotation by the user. Furthermore, the user can also know that the hot water orifice has been adjusted to its maximum opening when the blocking element abuts against the annular shoulder, preventing the adjustment knob from moving further outward. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the HVAC thermostatic valve.

[0020] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0021] In the diagram, 1. Valve body; 1a. Hot water passage; 1b. Return water passage; 1c. Hot water inlet; 1d. Hot water outlet; 1e. Return water inlet; 1f. Return water outlet; 2. Connecting pipe; 3. Thermostatic valve core; 3a. Control rod; 3b. Spring; 3c. Core shell; 4. Valve cover; 4a. Through hole; 4b. Annular shoulder; 4b1. Guide surface; 5. Adjustment knob; 5a. Columnar abutment; 5a1. Annular mounting groove; 5a2. Guide surface; 6. Blocking element; 7. Valve seat; 8. Valve stem; 8a. Sealing head; 9. Waterproof sealing ring. Detailed Implementation

[0022] 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.

[0023] like Figure 1 As shown, the HVAC thermostatic valve includes a valve body 1 with an internal hot water passage 1a and a return water passage 1b. The valve body 1 has a hot water inlet 1c and a hot water outlet 1d, both connected to the hot water passage 1a, and a return water inlet 1e and a return water outlet 1f, both connected to the return water passage 1b. The hot water inlet 1c and the return water outlet 1f are located on the same side, as are the hot water outlet 1d and the return water inlet 1e. Specifically, the valve body 1 has independent hot water chambers and return water chambers. The hot water passage 1a is located on the inner wall of the hot water chamber, and the hot water inlet 1c and the hot water outlet 1d are connected to the hot water passage 1a. The return water passage 1b is located on the inner wall of the return water chamber, and the return water inlet 1e and the return water outlet 1f are connected to the return water chamber. The hot water outlet 1d and the return water inlet 1e are each connected to a connecting pipe 2 via a union cap.

[0024] Furthermore, such as Figure 1 and Figure 2As shown, a hot water chamber penetrates the side wall of the valve body 1. A temperature control valve core 3 is installed inside the hot water chamber. The temperature control valve core 3 includes a control rod 3a that can move axially to block or open the hot water passage 1a at its inner end, and a spring 3b that acts on the control rod 3a to move it away from the hot water passage 1a. In this embodiment, the temperature control valve core 3 also includes a core shell 3c threadedly connected to the side wall of the valve body 1 where the hot water chamber penetrates. The control rod 3a passes through the core shell 3c, and the spring 3b is disposed inside the core shell 3c. A valve cover 4 is threadedly connected to the valve body 1. An adjusting knob 5 is threadedly connected to the outer end of the valve cover 4. The outer end of the valve cover 4 has a through hole 4a. The inner side of the adjusting knob 5 has a columnar abutment 5a that passes through the through hole 4a. The outer end of the control rod 3a abuts against the inner end of the columnar abutment 5a. An annular shoulder 4b is provided inside the outer port of the through hole 4a. An annular mounting groove 5a1 is provided on the outer periphery of the columnar abutment 5a near its inner end. An annular blocking member 6 is provided in the annular mounting groove 5a1. The blocking member 6 protrudes circumferentially from the annular mounting groove 5a1. The adjusting knob 5 can be moved towards its outer end until the blocking member 6 abuts against the annular shoulder 4b. The blocking member 6 is a steel wire retaining ring. The outer surface of the annular shoulder 4b is a tapered guide surface 4b1. The inner diameter of the guide surface 4b1 gradually increases from the inner end to the outer end of the valve cover 4. The maximum inner diameter of the guide surface 4b1 is greater than the inner diameter of the through hole 4a. The inner diameter of the steel wire retaining ring in its natural state is greater than the bottom diameter of the annular mounting groove 5a1. The outer diameter of the steel wire retaining ring in its natural state matches the diameter of the through hole 4a. The outer diameter of the steel wire retaining ring in its natural state is smaller than the outer diameter of the columnar abutment 5a. The inner end of the columnar abutment 5a has a tapered guide surface 5a2, and the outer diameter of the guide surface 5a2 gradually increases from the inner end to the outer end of the adjustment knob 5.

[0025] Furthermore, such as Figure 1 As shown, the return water chamber penetrates the side wall of the valve body 1. The portion of the valve body 1 penetrated by the return water chamber is opposite to the portion penetrated by the hot water chamber. A valve seat 7 is threaded into the return water chamber. The valve seat 7 has an inner hole, and a valve stem 8 is threaded into the inner hole of the valve seat 7. The inner end of the valve stem 8 has a sealing head 8a extending out of the valve seat 7. Movement of the valve stem 8 can cause the sealing head 8a to open or close the return water hole 1b. Specifically, the threaded connection between the valve stem 8 and the valve seat 7 is located at the outer end of the valve stem 8 and the middle of the valve seat 7. A water-proof sealing ring 9 is provided on the outer side of the middle part of the valve stem 8. The outer edge of the water-proof sealing ring 9 abuts against the inner wall of the valve seat 7 to form a seal. The valve stem 8 can move towards its outer end until the sealing head 8a abuts against the inner end of the valve seat 7.

[0026] In use, the connecting pipe 2 located at the hot water outlet 1d is connected to the radiator inlet, and the connecting pipe 2 located at the return water inlet 1e is connected to the radiator outlet. The hot water inlet 1c and the return water outlet 1f are connected to the hot water pipe and return water pipe in the heating system, respectively. With the hot water passage 1a and the return water passage 1b open, hot water enters the hot water chamber from the hot water inlet 1c, and then enters the radiator through the hot water passage 1a and the hot water outlet 1d. The return water flowing out of the radiator flows into the return water pipe through the return water inlet 1e, the return water passage 1b, the return water chamber, and the return water outlet 1f. The flow rate of hot water can be adjusted by rotating the adjusting knob 5 to regulate the radiator temperature. For example, when the radiator temperature is too high, rotating the adjusting knob 5 inwards moves the control lever 3a towards the hot water outlet 1a via the inner columnar abutment 5a. When the radiator temperature is too low, rotating the adjusting knob 5 outwards moves the control lever 3a away from the hot water outlet 1a under the elastic force of the spring 3b. Similarly, rotating the valve stem 8 adjusts the flow rate of return water into the return pipe. When the radiator needs maintenance, rotating the adjusting knob 5 inwards moves the control lever 3a against the opening of the hot water outlet 1a to cut off the flow of hot water into the radiator, and rotating the valve stem 8 inwards moves the sealing head 8a against the opening of the return water outlet 1b to cut off the flow of return water into the valve body 1, thereby isolating the radiator from the heating system.

[0027] This HVAC thermostatic valve features an annular shoulder 4b inside the outer port of the through hole 4a and an annular mounting groove 5a1 near the inner end on the outer periphery of the columnar abutment 5a. An annular blocking element 6 protrudes circumferentially from the annular mounting groove 5a1 within the annular mounting groove 5a1, thereby limiting the maximum outward movement of the adjustment knob 5. This prevents the adjustment knob 5 from being turned off the valve body 1 due to excessive rotation by the user. Furthermore, the user can also know that the hot water hole 1a has been adjusted to its maximum opening when the blocking element 6 abuts against the annular shoulder 4b, preventing the adjustment knob 5 from moving further outward.

[0028] 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 heating and ventilation thermostatic valve, comprising a valve body (1) having an internal hot water passage (1a), a thermostatic valve core (3) disposed within the valve body (1), a valve cover (4) threaded to the outside of the valve body (1), and an adjusting knob (5) threaded to the outer end of the valve cover (4), wherein the thermostatic valve core (3) comprises a control rod (3a) capable of moving along its own axial direction to block or open the hot water passage (1a), and a spring (3b) acting on the control rod (3a) to move it away from the hot water passage (1a), the outer end of the valve cover (4) having a through hole (4a), the inner side of the adjusting knob (5) having a columnar abutment (5a) passing through the through hole (4a), and the outer end of the control rod (3a) abutting against the columnar abutment (5a), characterized in that, The outer port of the through hole (4a) is provided with an annular shoulder (4b), and the outer periphery of the columnar abutment (5a) is provided with an annular mounting groove (5a1) near the inner end. An annular blocking member (6) is provided in the annular mounting groove (5a1). The blocking member (6) protrudes out of the annular mounting groove (5a1) in the circumferential direction. The adjusting knob (5) can be moved towards its outer end until the blocking member (6) abuts against the annular shoulder (4b).

2. The HVAC thermostatic valve according to claim 1, characterized in that, The blocking element (6) is a wire retaining ring. The outer side of the annular shoulder (4b) is a tapered guide surface (4b1). The inner diameter of the guide surface (4b1) gradually increases from the inner end to the outer end of the valve cover (4). The inner diameter of the wire retaining ring in its natural state is greater than the bottom diameter of the annular mounting groove (5a1).

3. The HVAC temperature control valve according to claim 2, characterized in that, The maximum inner diameter of the guide surface (4b1) is greater than the diameter of the through hole (4a), and the outer diameter of the wire retaining ring in its natural state matches the diameter of the through hole (4a).

4. The HVAC thermostatic valve according to claim 3, characterized in that, The inner end of the columnar abutment (5a) has a tapered guide surface (5a2), and the outer diameter of the guide surface (5a2) gradually increases from the inner end to the outer end of the adjustment knob (5).

5. The HVAC thermostatic valve according to claim 1, 2, 3, or 4, characterized in that, The valve body (1) also has a return water hole (1b). The valve body (1) has a hot water inlet (1c) and a hot water outlet (1d) that are both connected to the hot water hole (1a), and a return water inlet (1e) and a return water outlet (1f) that are both connected to the return water hole (1b). The valve body (1) is threadedly connected to a valve seat (7) with an inner hole. The inner end of the valve seat (7) is located inside the valve body (1). A valve stem is threadedly connected to the valve seat (7). (8) The inner end of the valve stem (8) has a sealing head (8a) that extends out of the valve seat (7). The movement of the valve stem (8) can cause the sealing head (8a) to open or close the return water hole (1b). A water-proof sealing ring (9) is provided on the outer side of the middle part of the valve stem (8) along the axial direction. The water-proof sealing ring (9) abuts against the inner wall of the valve seat (7). The valve stem (8) can move towards its outer end until the sealing head (8a) abuts against the inner end of the valve seat (7).

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