Quick-connection temperature control head

Abstract

A quick connection type temperature control head is installed on a temperature control valve and comprises a temperature sensing bag cover, a temperature sensing bag, a shell and a bottom cap. The shell is internally provided with a connecting body, the connecting body is fixedly connected with the temperature sensing bag cover, the connecting body is internally provided with a top sleeve, a return spring is arranged on the top of the top sleeve, an output sleeve rod of the temperature sensing bag is connected with a movable sleeve, the two ends of the return spring are respectively in contact with the top sleeve and the movable sleeve, and a valve rod of the temperature control valve is upwardly penetrated through a through hole and then abuts against the bottom of the movable sleeve. The connecting body and the top sleeve are provided with a movable groove for the action of a clamping block, the inner wall of the bottom cap is provided with a special-shaped table, the special-shaped table is provided with an open arc groove, the top is provided with a stop table, the stop table is provided with a lower positioning hole, and a torsional spring is placed on the stop table. The temperature control head can be conveniently and quickly installed on the temperature control valve, and the mode of avoiding scalding during the installation of the temperature control head is avoided. In the connecting effect, the installation of the temperature control head on the temperature control valve can be realized by only twisting the bottom cap.

Description

Technical Field

[0001] This invention relates to the field of heating, ventilation and air conditioning (HVAC), and specifically to a quick-connect thermostat. Background Technology

[0002] Thermostats and thermostatic valves are typical components used in the HVAC industry. Thermostats sense ambient temperature to control the opening of the thermostatic valve stem. Thermostatic valves are essentially flow regulating valves, controlling the outlet temperature of HVAC equipment by regulating the inlet flow of the heat medium. Therefore, thermostats are installed on thermostatic valves. Currently, most thermostatic valves and thermostats on the market use threaded or snap-fit ​​connections, secured with nuts.

[0003] However, there are the following shortcomings: On the one hand, the existing installation method is not only slow, but also requires the installer to have certain skills and experience, which makes it impossible to guarantee the reliability of the thermostat installation; on the other hand, the thermostat valve is used to control the flow of HVAC medium fluid into the HVAC heating element, and the pipe temperature is generally maintained at a high temperature of 50-70 degrees Celsius. When installing the traditional thermostat, the nut needs to be tightened manually by hand, which can easily cause burns. At high temperatures, it is also easy to not tighten it properly, which affects the temperature control effect of the thermostat. Summary of the Invention

[0004] In response to the problems raised in the background art, the present invention provides a quick-connect temperature control head to solve them, and the present invention will be further described below.

[0005] A quick-connect temperature control head, installed on a temperature control valve, includes a sensing bulb outer sleeve, a sensing bulb, a housing, and a bottom cap. The sensing bulb outer sleeve covers the sensing bulb, and the top of the sensing bulb outer sleeve has more than one through groove. The housing has a built-in connector for connecting the housing and the bottom cap. The connector is fixedly connected to the sensing bulb outer sleeve, and the inner wall of the connector has multiple radially protruding steps. The connector has a built-in top sleeve, the bottom of which is open, and the top of which has a through hole. A return spring is installed on the top of the top sleeve. The output sleeve rod of the sensing bulb is connected to a movable sleeve. The two ends of the return spring contact the top sleeve and the movable sleeve, respectively. The valve stem of the temperature control valve passes upward through the through hole and touches the movable sleeve. The bottom of the moving sleeve; the connecting body and the top sleeve are provided with a movable groove for the movement of the locking block; the inner wall of the bottom cap is provided with a radially protruding irregular platform in a circular array, and the irregular platform is provided with an arc groove, the distance of the arc groove from the center axis of the bottom cap gradually changes; the top of the irregular platform is provided with a raised stop platform, and the stop platform is provided with a lower positioning hole, and the torsion spring is placed on the stop platform; the bottom cap and the connecting body are connected by a locking block, the locking block is L-shaped, including an integrally connected horizontal part and a vertical part, the horizontal part is provided through the movable groove, and the vertical part is locked in the arc groove; the bottom cap also has a built-in torsion spring, and the lower end of the torsion spring is inserted into the lower positioning hole.

[0006] Furthermore, the outer casing of the temperature sensor includes a sleeve rod portion, a connecting rod portion, and an annular portion connected as one piece. The through groove is provided on the sleeve rod portion, and the temperature sensor is built into this sleeve rod portion. The two ends of the connecting rod portion are respectively connected to the sleeve rod portion and the annular portion.

[0007] Furthermore, the connecting rod portion of the temperature sensing bag outer casing is L-shaped, including a horizontal section and a vertical section, and the protruding part that the upper movable end of the torsion spring abuts against is this horizontal section.

[0008] Furthermore, the outer wall of the connecting body is provided with an axial clearance groove, and the connecting rod part cooperates with the clearance groove; there is a gap between the vertical section and the clearance groove of the connecting body, and this gap forms a ventilation channel for airflow. At the same time, there is a gap between the bottom cap and the outer sleeve of the temperature sensing bag.

[0009] Furthermore, the main body of the movable sleeve is a cylindrical portion with an open top. A radially protruding flange is provided at the edge of the opening at the top of the cylindrical portion. The return spring is sleeved on the cylindrical portion of the movable sleeve and contacts the bottom surface of the flange. Symmetrically arranged radially protruding concave grooves are provided on the flange, and these concave grooves fit into the connecting rod portion of the temperature-sensing envelope. The connecting rod portion serves to guide the movable sleeve in lifting and lowering while simultaneously restricting its rotation.

[0010] Furthermore, the sleeve rod is an assembly comprising a push rod with one end embedded within the temperature sensing bulb and enveloped by the medium inside the bulb. The push rod has a hollow interior, within which an overload spring is installed. One end of the overload spring presses upward against the inner top wall of the push rod, while the other end presses downward against the bottom of the movable sleeve. A hook portion is provided at the end of the push rod exposed above the temperature sensing bulb, and a vertical movable groove is provided on the cylindrical side wall of the movable sleeve, within which the hook portion engages. The function of the overload spring is to ensure that the valve stem can stably press against the push rod when the temperature is too high, causing the temperature sensing bulb to expand excessively.

[0011] Furthermore, the connecting rod portion of the temperature sensing bag outer casing is L-shaped, including a horizontal section and a vertical section, with the protruding part that the upper movable end of the torsion spring abuts against is this horizontal section.

[0012] Furthermore, a through upper positioning groove is provided on the horizontal section, through which the upper movable end of the torsion spring passes. The upper positioning groove serves to prevent lateral dislocation of the upper movable end of the torsion spring and to provide space and guidance for vertical movement.

[0013] Furthermore, there is a gap between the vertical section and the recessed groove of the connecting body, which forms a ventilation channel for airflow. Simultaneously, there is a gap between the bottom cap and the outer sleeve of the temperature sensor, and the cavity containing the movable sleeve communicates with the outside. This further ensures that the ambient temperature of the temperature sensor is not affected by the temperature control valve.

[0014] Furthermore, the lower positioning hole is located on the irregular platform at the part closest to the connecting body.

[0015] Beneficial effects: Compared with the prior art, the present invention can conveniently and quickly install the temperature control head on the temperature control valve, avoiding the risk of burns during installation; in terms of connection, the temperature control head can be installed on the temperature control valve simply by twisting the bottom cap; when the temperature is too high and the temperature bulb expands excessively, the presence of the overpressure spring ensures that the valve stem can stably press against the top rod. Attached Figure Description

[0016] Figure 1 : A schematic diagram of the structure of the present invention;

[0017] Figure 2 A cross-sectional view of the present invention;

[0018] Figure 3 : Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 4 Top view of the bottom cap structure;

[0020] Figure 5 : Schematic diagram of the connector structure;

[0021] Figure 6 : Schematic diagram of the connection between the connector and the outer casing of the temperature sensor;

[0022] In the diagram: 1. Temperature sensor outer casing; 101. Through groove; 102. First slot; 103. Sleeve rod; 104. Connecting rod; 105. Ring cylinder; 106. Horizontal section; 107. Vertical section; 2. Temperature sensor; 3. Outer casing; 301. Locking protrusion; 4. Bottom cap; 401. Irregular platform; 402. Open arc groove; 403. Lower positioning hole; 404. Stop platform; 5. Sleeve rod; 6. Connecting body; 601. Alternating groove; 602. Stepped section; 603. Second slot; 604. Thread; 7. Top sleeve; 701. Through groove; 702. Through hole; 8. Return spring; 9. Movable sleeve; 901. Cylinder; 902. Flange; 903. Concave groove; 904. Vertical movable groove; 905. Positioning rod; 10. Overload spring; 11. Top rod; 111. Hook; 12. Locking block; 121. Horizontal section; 122. Vertical section; 13. Torsion spring; 14. Vent. Detailed Implementation

[0023] Next, we will combine the appendix Figure 1-6 A specific embodiment of the present invention will be described in detail below.

[0024] A quick-connect temperature controller is installed on a temperature control valve. The valve stem of the temperature control valve contacts the output of the temperature controller. The temperature controller senses the ambient temperature and adjusts its output accordingly, thereby changing the length of the valve stem exposed outside the temperature control valve to change the valve's opening degree. The temperature controller includes a sensing bulb outer sleeve 1, a sensing bulb 2, a housing 3, and a bottom cap 4. The sensing bulb outer sleeve 1 is disposed outside the sensing bulb 2 to enclose it. The top of the sensing bulb outer sleeve 1 has multiple through slots 101, which connect the inner and outer environments of the sensing bulb outer sleeve 1, allowing the sensing bulb 2 to directly obtain the ambient temperature.

[0025] The temperature-sensing bulb 2 is existing technology, containing a medium that expands or contracts according to temperature. The temperature-sensing bulb 2 is connected to a movable sleeve 5, one end of which is embedded within the temperature-sensing bulb 2 and enveloped by the medium inside. When the temperature changes, the medium inside the temperature-sensing bulb expands or contracts, thereby changing the extension / retraction state of the sleeve 5. In this embodiment, the medium inside the temperature-sensing bulb 2 is liquid, preferably ethyl acetate.

[0026] The outer shell 3 is snapped onto the outer shell 1 of the temperature sensor to protect the temperature sensor. Specifically, the inner wall of the outer shell 3 is provided with a snap-fit ​​protrusion 301, and the outer wall of the corresponding temperature sensor is provided with a first snap-fit ​​groove 102. During installation, the snap-fit ​​protrusion 301 slides axially on the temperature sensor 1 toward the first snap-fit ​​groove 102 until it is snapped into the first snap-fit ​​groove 102 to complete the connection.

[0027] The outer shell 3 also has a built-in connector 6 for connecting the outer shell 3 and the bottom cap 4. The bottom of the inner wall of the outer shell 3 is provided with threads, and the outer wall of the connector 6 is provided with corresponding threads 604. The outer shell 3 and the connector 6 are threadedly connected. The connector 6 is snapped onto the temperature control valve. The threaded connection between the outer shell 3 and the connector 6, as well as the snap-fit ​​connection between the outer shell 3 and the outer sleeve 1 of the temperature sensing bulb, connect the outer sleeve 1 of the temperature sensing bulb, the outer shell 3 and the connector 6 into a whole. After installation, they are fixed in the axial direction. The purpose is to provide rotational freedom for the setting of the bottom cap 4 and to ensure that the expansion and contraction of the temperature sensing bulb 2 can only be reflected in the displacement output of the sleeve 5.

[0028] The outer casing 1 of the temperature sensing element includes a sleeve rod portion 103, a connecting rod portion 104, and an annular portion 105 connected as one piece. A through groove 101 is provided on the sleeve rod portion 103, and the temperature sensing element 2 is housed within this sleeve rod portion 103. The connecting rod portion 104 connects the sleeve rod portion 103 and the annular portion 105 at both ends, and the first retaining groove 102 is provided on the connecting rod portion 104. The annular portion 105 is exposed and forms a continuous surface of the temperature control head with the outer casing 3. Preferably, both the bottom of the annular portion 105 and the outer casing 3 are provided with retaining protrusions and retaining grooves. The retaining protrusions and retaining grooves between the annular portion 105 and the outer casing 3 achieve staggered radial limiting, resulting in redundant limiting overall.

[0029] The outer wall of the connector 6 has an axially oriented recess 601. The presence of the recess 601 makes the thread on the outer wall of the connector intermittent. During manufacturing, a continuous thread can be pre-machined, and then the recess 601 can be machined, thus not affecting the connection between the connector 6 and the outer shell 3. The connecting rod portion 104 cooperates with the recess 601. The recess 601 serves as a space to accommodate the connecting rod portion 104, allowing the connector 6 and the outer shell 3 to be threadedly connected.

[0030] The inner wall of the connector 6 is provided with multiple radially protruding stepped portions 602. A top sleeve 7 is built into the connector 6 and rests on the stepped portions 602. The bottom of the top sleeve 7 is open, and a through groove 701 is provided at the bottom edge. The stepped portions 602 are engaged with the through groove 701. A through hole 702 is provided at the top of the top sleeve 7, and a return spring 8 is provided on the top of the top sleeve 7. The output sleeve rod 5 of the temperature sensing bulb 2 is connected to a movable sleeve 9. The two ends of the return spring 8 contact the top sleeve 7 and the movable sleeve 9 respectively. That is, the sleeve rod 5 and the return spring 8 suspend the movable sleeve 9 on the top sleeve 7. The spatial height of the movable sleeve 9 is controlled by the combined action of the sleeve rod 5 and the return spring 8. The valve stem of the thermostatic valve passes upward through the through hole 702 and touches the bottom of the movable sleeve 9. When the ambient temperature rises, the temperature sensing bulb is heated, pushing the sleeve rod out a certain length, which in turn presses the valve stem downward into the thermostatic valve body a certain length, reducing the opening of the thermostatic valve and thus reducing the flow rate of the HVAC fluid, and vice versa.

[0031] The main body of the movable sleeve 9 is a cylindrical part 901 with an opening at the top. A radially protruding flange 902 is provided at the edge of the opening at the top of the cylindrical part 901. The return spring 8 is sleeved on the cylindrical part 901 of the movable sleeve 9 and contacts the bottom surface of the flange 902. A radially protruding concave groove 903 is symmetrically provided on the flange 902. The concave groove 903 is fitted on the connecting rod part 104 of the temperature sensing outer sleeve 1. The connecting rod part 104 has the function of guiding the movable sleeve 9 to rise and fall, while restricting its rotation.

[0032] The sleeve 5 is an assembly, including a top rod 11 with one end built into the temperature sensing bulb 2 and surrounded by the medium inside the temperature sensing bulb 2. The top rod 11 has a cavity inside, and an overload spring 10 is installed in the cavity. One end of the overload spring 10 presses upward against the inner top wall of the top rod 11, and the other end presses downward against the bottom of the movable sleeve 9. The end of the top rod 11 exposed above the temperature sensing bulb 2 is provided with a hook part 111. The side wall of the cylindrical part 901 of the movable sleeve 9 is provided with a vertical movable groove 904. The hook part 111 fits into this vertical movable groove 904, and the vertical movable groove 904 provides space for the hook part 111 to move up and down. The function of the overload spring 10 is: on the one hand, when the temperature is too high and the temperature sensing bulb expands excessively, it ensures that the valve stem can stably push against the top rod; on the other hand, it absorbs the sudden increase in thrust caused by the sudden increase in fluid pressure fluctuations in the temperature control valve, which causes the valve stem to push out, thus protecting the temperature sensing bulb.

[0033] The cylindrical part 901 is provided with an integrally connected positioning rod 905. The overload spring 10 is pressed tightly against one end of the cylindrical part 901 and sleeved on the positioning rod 905. The function of the positioning rod 905 is to limit the compression deformation direction of the overload spring 10 and restrict the lateral displacement of its bottom contact end.

[0034] The height of the through groove 701 is greater than the height of the step 602. A second slot 603 is provided on the connecting body 6 below the step 602. The second slot 603 connects to the through groove 701 to form a horizontal movable groove for the movement of the locking block 12. The inner wall of the bottom cap 4 is circumferentially arrayed with radially protruding irregularly shaped platforms 401. Each irregularly shaped platform 401 has an arc-shaped groove 402. The distance between the arc-shaped groove 402 and the central axis of the bottom cap 4 gradually increases or decreases, and can be configured as an involute. The bottom cap 4 and the connecting body 6... The components are connected by a locking block 12, which is L-shaped and includes an integrally connected horizontal part 121 and a vertical part 122. The horizontal part 121 is disposed through the second locking groove 603 and the first locking groove 102, and the vertical part 122 is locked in the arc groove 402. The bottom cap 4 also has a built-in torsion spring 13. A lower positioning hole 403 is provided on a shaped platform 401. One end of the torsion spring 13 is inserted into the lower positioning hole 403, and the other end is a movable end. This movable end abuts against a protruding part on the outer shell 3 or the connecting body 6.

[0035] The temperature control head of this invention is installed on a temperature control valve. The temperature control valve has a number of slots matching the number of locking blocks 12. In this embodiment, there are four slots. During installation, the bottom cap 4 is pre-twisted, causing the torsion spring 13 to deform and store energy. At this time, the locking block 12 is located at the end of the arc groove 402 furthest from the central axis. The horizontal part 121 of the locking block 12 retracts into the movable groove, thus pressing the bottom cap 4 and the connecting body 6 together onto the temperature control valve. Then, the bottom cap 4 is released, and the valve is rotated in the opposite direction and / or the torsion spring... Under the elastic force of 13, the bottom cap 4 rotates in the opposite direction. During the rotation, the arc groove 402 pushes the locking block 12 to move radially. The horizontal part 121 is exposed in the movable groove and is locked into the slot of the temperature control valve, thus completing the installation of the temperature control head and the temperature control valve. This avoids the disadvantages of the prior art described in the background, such as difficulty in installation and hot hands. After installation, the elastic force of the torsion spring always gives the bottom cap 4 a pre-tightening force, preventing the bottom cap 4 from rotating and pulling out the locking block 12, causing the temperature control valve and the temperature control head to disengage.

[0036] The irregular platform 401 has a raised stop platform 404 at its top, and the lower positioning hole 403 is located on this stop platform 404. The torsion spring 13 is placed on the stop platform 404. The lower positioning hole 403 is located on the irregular platform 401 at the part closest to the connecting body 6. The reason is that if the number of turns of the torsion spring 13 increases during the torsion process, the diameter of the turns will gradually decrease. Since the position of the lower positioning hole 403 is fixed, the change in the diameter of the torsion spring 13 is entirely reflected on the side opposite to the lower positioning hole 403.

[0037] In this embodiment, the upper movable end of the torsion spring 13 abuts against a protruding part on the connecting body 6. The connecting rod part 104 of the temperature sensing bag 1 is L-shaped, including a horizontal section 106 and a vertical section 107. The protruding part that the upper movable end of the torsion spring 13 abuts against is this horizontal section 106.

[0038] There is a gap between the vertical section 107 and the clearance groove 601 of the connecting body 6. This gap forms a ventilation channel 14 for airflow. At the same time, there is a gap between the bottom cap 4 and the outer sleeve 1 of the temperature sensing bulb. That is, after the temperature control head is installed, the cavity where the movable sleeve 9 is located is connected to the outside, and the internal and external pressures are consistent, which further ensures that the ambient temperature of the temperature sensing bulb is not affected by the temperature control valve.

[0039] This invention allows for convenient and quick installation of the temperature control head onto the temperature control valve, avoiding the risk of burns during installation. Regarding the connection, the temperature control head can be installed on the temperature control valve simply by twisting the bottom cap 4. When the temperature is too high and the temperature bulb expands excessively, the presence of the overpressure spring ensures that the valve stem can stably press against the top rod.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A quick-connect temperature control head, installed on a temperature control valve, comprising a temperature sensing bulb outer sleeve (1), a temperature sensing bulb (2), a shell (3), and a bottom cap (4), wherein the temperature sensing bulb outer sleeve (1) wraps around the temperature sensing bulb (2), and the top of the temperature sensing bulb outer sleeve (1) is provided with more than one through groove (101); characterized in that: The outer shell (3) has a built-in connector (6) for connecting the outer shell (3) and the bottom cap (4). The connector (6) is fixedly connected to the outer shell (1) of the temperature sensor. The inner wall of the connector (6) is provided with multiple radially protruding steps (602). The connector (6) has a built-in top sleeve (7). The bottom of the top sleeve (7) is open, and a through hole (702) is provided at the top. A return spring (8) is provided on the top of the top sleeve (7). The output sleeve rod (5) of the temperature sensor (2) is connected to a movable sleeve (9). The two ends of the return spring (8) contact the top sleeve (7) and the movable sleeve (9) respectively. The valve stem of the temperature control valve passes through the through hole (702) upward and touches the bottom of the movable sleeve (9). A movable groove for the movement of the locking block (12) is provided through the connecting body (6) and the top sleeve (7). A radially protruding irregular platform (401) is arranged in a circular array on the inner wall of the bottom cap (4). An arc-shaped groove (402) is provided on the irregular platform (401), and the distance between the arc-shaped groove (402) and the central axis of the bottom cap (4) gradually changes. A raised stop platform (404) is provided on the top of the irregular platform (401), and a lower positioning hole (403) is provided on the stop platform (404). The bottom cap (4) and the connecting body (6) are connected by... The two parts are connected by a locking block (12), which is L-shaped and includes an integrally connected horizontal part (121) and a vertical part (122). The horizontal part (121) is installed through the movable groove, and the vertical part (122) is locked in the open arc groove (402). The bottom cap (4) also has a torsion spring (13) built in. The torsion spring (13) is placed on the stop platform (404). The upper movable end of the torsion spring (13) abuts against a protruding part on the connecting body (6), and the lower end is inserted into the lower positioning hole (403).

2. The quick-connect temperature controller according to claim 1, characterized in that: The outer casing (1) of the temperature sensor includes a sleeve rod (103), a connecting rod (104) and an annular cylinder (105) connected as one unit. The through groove (101) is provided on the sleeve rod (103), and the temperature sensor (2) is built into the sleeve rod (103). The two ends of the connecting rod (104) are respectively connected to the sleeve rod (103) and the annular cylinder (105).

3. The quick-connect temperature controller according to claim 2, characterized in that: The connecting rod (104) of the temperature sensing bag jacket (1) is L-shaped, including a horizontal section (106) and a vertical section (107), and the protruding part that the upper movable end of the torsion spring (13) abuts is the horizontal section (106).

4. The quick-connect temperature controller according to claim 3, characterized in that: The outer wall of the connector (6) is provided with a clearance groove (601) in the axial direction, and the connecting rod part (104) cooperates with the clearance groove (601); there is a gap between the vertical section (107) and the clearance groove (601) of the connector (6), and this gap forms an air passage (14) for airflow. At the same time, there is a gap between the bottom cap (4) and the outer jacket of the temperature sensing bag (1).

5. The quick-connect temperature controller according to claim 1, characterized in that: The main body of the movable sleeve (9) is a cylindrical part (901) with an opening at the top. A radially protruding flange (902) is provided at the edge of the opening at the top of the cylindrical part (901). The return spring (8) is sleeved on the cylindrical part (901) of the movable sleeve (9) and contacts the bottom surface of the flange (902). A radially protruding concave groove (903) is symmetrically provided on the flange (902). The concave groove (903) is fitted on the connecting rod part (104) of the temperature sensing bag outer sleeve (1).

6. The quick-connect temperature controller according to claim 1, characterized in that: The sleeve rod (5) is an assembly, including a top rod (11) with one end built into the temperature sensing bag (2) and wrapped by the medium inside the temperature sensing bag (2). The top rod (11) has a cavity inside, and an overload spring (10) is provided in the cavity. One end of the overload spring (10) is pressed upward against the top wall inside the top rod (11), and the other end is pressed downward against the bottom of the movable sleeve (9). The end of the top rod (11) exposed outside the temperature sensing bag (2) is provided with a hook (111). A vertical movable groove (904) is provided on the side wall of the cylindrical part (901) of the movable sleeve (9), and the hook (111) is fitted in this vertical movable groove (904).

7. The quick-connect temperature controller according to claim 1, characterized in that: The lower positioning hole (403) is located on the irregular platform (401) at the part closest to the connector (6).

8. The quick-connect temperature controller according to claim 1, characterized in that: The liquid substance inside the temperature-sensing device is ethyl acetate.

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