Constant temperature controller

Abstract

The utility model discloses a constant temperature controller which comprises a base shell, the base shell is connected with an adjusting shell in a clamping mode, the adjusting shell rotates around the axis of the adjusting shell, the inner side of the adjusting shell is meshed with a temperature sensing bag outer shell, a temperature sensing bag body is installed in the temperature sensing bag outer shell, a corrugated pipe is installed in the temperature sensing bag body, a pressing rod is arranged in the corrugated pipe, and the pressing rod is connected with the temperature sensing bag outer shell. And the lower side of the thermal bulb shell is integrally connected with a first threaded plate, the first threaded plate is in threaded connection with a second threaded plate, and one end of the second threaded plate is connected with a bottom cap in a clamped mode. The utility model has the advantages that the installation is convenient, and the corrugated pipe is additionally arranged, so that the sealing performance is improved when the pressing rod moves.

Description

Technical Field

[0001] This utility model relates to the field of constant temperature controllers, specifically a constant temperature controller. 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, the following shortcomings exist: 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 temperature control head installation. Utility Model Content

[0004] The purpose of this utility model is to provide a constant temperature controller to solve the problems mentioned in the background art. It has the advantages of convenient installation and the addition of a bellows to increase sealing when the pressing rod moves.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a constant temperature controller, comprising a base shell, wherein an adjusting shell that rotates around its own axis is snapped onto the base shell, a temperature sensing bulb shell is engaged with the inner side of the adjusting shell, a temperature sensing bulb body is installed inside the temperature sensing bulb shell, a bellows is installed inside the temperature sensing bulb body, a pressing rod is provided inside the bellows, a first threaded plate is integrally connected to the lower side of the temperature sensing bulb shell, a second threaded plate is threadedly connected to the first threaded plate, and a bottom cap is snapped onto one end of the second threaded plate.

[0006] By adopting the above technical solution, when adjustment is required, rotating the adjustment shell causes the adjustment shell and the base shell to rotate relative to each other. The rotation of the adjustment shell will drive the outer shell of the temperature sensing bulb to rotate, which in turn drives the first threaded plate to rotate. The rotation of the first threaded plate will cooperate with the second threaded plate to move up and down along its own axis. After the first threaded plate moves, it will drive the temperature sensing bulb body to move, which will drive the pressing rod to move up and down until one end of the pressing rod abuts against the valve stem of the temperature control valve. The bottom cap can be connected to the temperature control valve.

[0007] As a further embodiment of this utility model: a support ring is snapped onto one end of the first threaded plate.

[0008] By adopting the above technical solution, the support ring provides support to the first threaded plate from the inside.

[0009] As a further improvement of this utility model, both the adjusting shell and the base shell are provided with markings on one side.

[0010] By adopting the above technical solution, the setting of the markings can identify the relative positional relationship between the adjustment shell and the base shell.

[0011] As a further embodiment of this utility model: the pressing rod includes an upper rod and a lower rod that are interlocked with each other. The lower rod has a first receiving groove on the side facing the upper rod to accommodate the upper rod, and the upper rod has a second receiving groove on the side facing the lower rod. The lower rod is integrally connected to a limiting rod that is simultaneously located in the first receiving groove and the second receiving groove. The positioning plate is circumferentially sleeved with an overpressure spring that is simultaneously located in the first receiving groove and the second receiving groove.

[0012] By adopting the above technical solution, when the temperature is too high, the liquid inside the temperature sensing bulb will expand. The pressing rod itself has a certain deformation capability, which can buffer the space occupied by the expansion of the liquid. This process is that the upper rod moves in the direction of the lower rod, thereby compressing the overpressure spring and shortening the overall length of the pressing rod.

[0013] As a further improvement of this utility model: one end of the lower rod is integrally connected to a limit ring, and the lower rod sleeve is provided with a return spring.

[0014] By adopting the above technical solution, the setting of the return spring gives the lower rod the ability to return to its original position.

[0015] Preferably, the adjusting shell is provided with a plurality of vent holes in the circumferential direction.

[0016] As a further embodiment of this utility model: the adjusting shell and the base shell are integrally connected by a first locking block and a second locking block that are mutually engaged.

[0017] By adopting the above technical solution, the first and second locking blocks cooperate to lock the adjusting shell and the base shell together.

[0018] As a further embodiment of this utility model: the second threaded plate is integrally connected with a hook rod, and the second threaded plate is engaged with the bottom cap through the hook rod.

[0019] By adopting the above technical solution, the hook rod is designed to connect the bottom cap and the second threaded plate.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] When adjustment is needed, rotate the adjustment shell to make the adjustment shell and the base shell rotate relative to each other. The rotation of the adjustment shell will drive the outer shell of the temperature sensing bulb to rotate, which in turn will drive the first threaded plate to rotate. The rotation of the first threaded plate will cooperate with the second threaded plate to move up and down along its own axis. After the first threaded plate moves, it will drive the temperature sensing bulb body to move, which will drive the pressing rod to move up and down until one end of the pressing rod abuts against the valve stem of the temperature control valve. The bottom cap can be connected to the temperature control valve. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0023] Figure 2 This is a top view of an embodiment;

[0024] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0025] Figure 4 This is a schematic diagram of the structure after removing a portion of the base shell in an embodiment.

[0026] In the diagram: 1. Base shell; 2. Adjustment shell; 3. Temperature sensor shell; 4. Temperature sensor body; 5. Bellows; 6. Pressing rod; 7. First threaded plate; 8. Second threaded plate; 9. Bottom cap; 10. Support ring; 11. Marker; 12. Upper rod; 13. Lower rod; 14. First receiving groove; 15. Second receiving groove; 16. Limiting rod; 17. Overpressure spring; 18. Limiting ring; 19. Reset spring; 20. Vent hole; 21. First locking block; 22. Second locking block; 23. Hook rod. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In this embodiment of the utility model,

[0029] A thermostat, such as Figures 1-4 As shown, it includes a base shell 1, which is snapped with an adjusting shell 2 that rotates around its own axis. A temperature sensing bulb shell 3 is engaged inside the adjusting shell 2. A temperature sensing bulb body 4 is installed inside the temperature sensing bulb shell 3. A bellows tube 5 is installed inside the temperature sensing bulb body 4. A pressing rod 6 is provided inside the bellows tube 5. A first threaded plate 7 is integrally connected to the lower side of the temperature sensing bulb shell 3. A second threaded plate 8 is threadedly connected to the first threaded plate 7. A bottom cap 9 is snapped onto one end of the second threaded plate 8.

[0030] One end of the first threaded plate 7 is fitted with a support ring 10.

[0031] Both the adjusting shell 2 and the base shell 1 have a mark 11 on one side.

[0032] The pressing rod 6 includes an upper rod 12 and a lower rod 13 that are interlocked. The lower rod 13 has a first receiving groove 14 on the side facing the upper rod 12 to accommodate the upper rod 12. The upper rod 12 has a second receiving groove 15 on the side facing the lower rod 13. The lower rod 13 is integrally connected to a limiting rod 16 that is simultaneously located in the first receiving groove 14 and the second receiving groove 15. The positioning plate is circumferentially sleeved with an overpressure spring 17 that is simultaneously located in the first receiving groove 14 and the second receiving groove 15.

[0033] One end of the lower rod 13 is integrally connected to a limit ring 18, and a return spring 19 is sleeved on the lower rod 13.

[0034] The regulating shell 2 is provided with a plurality of vent holes 20 in the circumferential direction.

[0035] The adjusting shell 2 and the base shell 1 are integrally connected by a first locking block 21 and a second locking block 22 that are interlocked with each other.

[0036] The second threaded plate 8 is integrally connected with a hook rod 23, and the second threaded plate 8 is engaged with the bottom cap 9 through the hook rod 23.

[0037] Working principle:

[0038] When adjustment is required, rotate the adjusting shell 2 to make the adjusting shell 2 and the base shell 1 rotate relative to each other. The rotation of the adjusting shell 2 will drive the temperature sensing bulb shell 3 to rotate, which in turn will drive the first threaded plate 7 to rotate. The rotation of the first threaded plate 7 will cooperate with the second threaded plate 8 to move up and down along its own axis. After the first threaded plate 7 moves, it will drive the temperature sensing bulb body 4 to move, which will drive the pressing rod 6 to move up and down until one end of the pressing rod 6 abuts against the valve stem of the temperature control valve. The bottom cap 9 can be connected to the temperature control valve.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A constant temperature controller, comprising a base shell (1), characterized in that: The base shell (1) is engaged with an adjusting shell (2) that rotates around its own axis. The inner side of the adjusting shell (2) is engaged with a temperature sensing bulb shell (3). A temperature sensing bulb body (4) is installed inside the temperature sensing bulb shell (3). A bellows tube (5) is installed inside the temperature sensing bulb body (4). A pressing rod (6) is provided inside the bellows tube (5). A first threaded plate (7) is integrally connected to the lower side of the temperature sensing bulb shell (3). A second threaded plate (8) is threadedly connected to the first threaded plate (7). A bottom cap (9) is engaged at one end of the second threaded plate (8).

2. The thermostat according to claim 1, characterized in that: One end of the first threaded plate (7) is fitted with a support ring (10).

3. The constant temperature controller according to claim 1, characterized in that: Both the adjusting shell (2) and the base shell (1) are provided with a mark (11) on one side.

4. The thermostat according to claim 1, characterized in that: The pressing rod (6) includes an upper rod (12) and a lower rod (13) that are interlocked with each other. The lower rod (13) has a first receiving groove (14) for accommodating the upper rod (12) on the side facing the upper rod (12). The upper rod (12) has a second receiving groove (15) on the side facing the lower rod (13). The lower rod (13) is integrally connected to a limiting rod (16) that is simultaneously located in the first receiving groove (14) and the second receiving groove (15). The limiting rod (16) is circumferentially sleeved with an overpressure spring (17) that is simultaneously located in the first receiving groove (14) and the second receiving groove (15).

5. The thermostat according to claim 4, characterized in that: One end of the lower rod (13) is integrally connected to a limit ring (18), and a return spring (19) is sleeved on the lower rod (13).

6. The constant temperature controller according to claim 1, characterized in that: The regulating shell (2) is provided with a plurality of vent holes (20) in the circumferential direction.

7. The constant temperature controller according to claim 1, characterized in that: The adjusting shell (2) and the base shell (1) are integrally connected by a first locking block (21) and a second locking block (22) that are interlocked with each other.

8. The constant temperature controller according to claim 1, characterized in that: The second threaded plate (8) is integrally connected with a hook rod (23), and the second threaded plate (8) is engaged with the bottom cap (9) through the hook rod (23).

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