Mini constant temperature controller

Abstract

The utility model discloses a mini-type constant temperature controller comprising a housing, the housing is clamped with a first threaded plate, the first threaded plate is in threaded connection with a second threaded plate, a temperature sensing bag is arranged in the housing, a threaded pipe is arranged in the temperature sensing bag, a pressing rod is arranged in the threaded pipe, and the pressing rod is in threaded connection with the first threaded plate. The lower end of the pressing rod is arranged to be circular and provided with an arc-shaped groove concaved inwards, the second threaded plate comprises an annular plate located in the middle, and the bottom of the annular plate is provided with a penetrating groove which is used for the pressing rod to penetrate through and is matched with the lower end of the pressing rod. The utility model has the advantages of miniaturization and rapid induction.

Description

Technical Field

[0001] This utility model relates to the field of thermostats, specifically a mini thermostat. Background Technology

[0002] Thermostatic valves are a typical application of flow control valves in the field of temperature control. Their basic principle is to control the outlet temperature of heat exchangers, air conditioning units, or other heat- or cold-using equipment by controlling the inlet flow rate of the primary heat or heat medium. When the load changes, the flow rate is adjusted by changing the valve opening to eliminate the effects of load fluctuations and restore the temperature to the set value.

[0003] The current temperature control valve is relatively large, and the spring added to the outside of the temperature sensing bulb does not directly contact the metal shell, resulting in insufficient temperature sensing speed, which needs to be improved. Utility Model Content

[0004] The purpose of this invention is to provide a miniature thermostat to solve the problems mentioned in the background art, which has the advantages of being small in size and having rapid sensing capabilities.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a miniature thermostat, comprising a housing, wherein a first threaded plate is snapped onto the housing, and a second threaded plate is threaded onto the first threaded plate; a temperature sensing bulb is disposed inside the housing, and a threaded tube is disposed inside the temperature sensing bulb; a pressing rod is disposed inside the threaded tube; the lower end of the pressing rod is circular and has an inwardly recessed arc-shaped groove; the second threaded plate includes an annular plate in the middle, and a through groove is disposed at the bottom of the annular plate for the pressing rod to pass through and to fit with the lower end of the pressing rod.

[0006] By adopting the above technical solution, the rotating shell drives the first threaded plate to rotate. The first threaded plate and the second threaded plate are threadedly connected. During this process, the first threaded plate moves along its own axis, thereby driving the temperature sensing bulb to move. The movement of the temperature sensing bulb drives the threaded tube to move, thereby driving the pressing rod to move to the required position. The lower end of the pressing rod cooperates with the through groove to restrict the rotation of the pressing rod, so that the pressing rod can only move along its own length direction.

[0007] As a further embodiment of this utility model: the upper side of the temperature sensing bag is provided with a feed hole penetrating the temperature sensing bag, and the temperature sensing bag is integrally connected with a feed channel located at the feed hole, and the feed channel is provided with a sealing ball for sealing.

[0008] By adopting the above technical solution, the feed channel is designed to facilitate liquid filling, and the sealing ball provides a sealing function.

[0009] 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 for accommodating 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 located in the second receiving groove, and the limiting rod is sleeved with an overpressure spring located in the second receiving groove.

[0010] 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.

[0011] As a further improvement of this utility model: the annular plate is circumferentially sleeved with a return spring located in the circumferential direction of the lower rod.

[0012] By adopting the above technical solution, the return spring is designed to give the lower rod the ability to return to its original position.

[0013] As a further embodiment of this utility model: the outer shell and the first threaded plate are connected by a clamping plate, one end of the clamping plate is integrally connected to an outwardly protruding convex plate, one end of the clamping plate is provided with a circular groove penetrating the clamping plate, and one end of the clamping plate is integrally connected to an identification plate.

[0014] By adopting the above technical solution, the convex plate passes through the outer shell and is inserted into the first threaded plate. During this process, the convex plate is compressed and deflected inward, so that the outer shell and the first threaded plate are engaged by the clamping plate. The marking plate is on the outside of the outer shell and cannot be inserted into the outer shell, thus playing the role of marking.

[0015] As a further improvement of this utility model, the outer shell is provided with a plurality of marking blocks in the circumferential direction.

[0016] By adopting the above technical solution, the setting of the identification block serves the purpose of identification.

[0017] As a further improvement of this utility model: the second threaded plate is provided with a circular hole that penetrates the first threaded plate.

[0018] By adopting the above technical solution, the setting of the circular hole allows the second threaded plate to have room for deformation.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The rotating outer shell drives the first threaded plate to rotate. The first threaded plate and the second threaded plate are threadedly connected. During this process, the first threaded plate moves along its own axis, which in turn drives the temperature sensing bulb to move. The movement of the temperature sensing bulb drives the threaded tube to move, which in turn drives the pressing rod to move to the required position. The lower end of the pressing rod cooperates with the through groove to restrict the rotation of the pressing rod, so that the pressing rod can only move along its own length. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0022] Figure 2 This is a structural schematic diagram from another perspective of the embodiment;

[0023] Figure 3 This is a top view of an embodiment;

[0024] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0025] Figure 5 for Figure 3 Cross-sectional view along the BB direction;

[0026] Figure 6 This is a schematic diagram of the structure after removing the outer shell and the first threaded plate in the embodiment;

[0027] Figure 7 for Figure 6 A magnified view of a portion of region A in the middle.

[0028] In the diagram: 1. First threaded plate; 2. Second threaded plate; 3. Temperature sensing bulb; 4. Threaded tube; 5. Pressing rod; 6. Arc-shaped groove; 7. Annular plate; 8. Through groove; 9. Feed hole; 10. Feed channel; 11. Sealing ball; 12. Upper rod; 13. Lower rod; 14. First receiving groove; 15. Second receiving groove; 16. Limiting rod; 17. Overpressure spring; 18. Return spring; 19. Protruding plate; 20. Circular groove; 21. Marking plate; 22. Marking block; 23. Circular hole; 24. Outer shell; 25. Clamping plate. Detailed Implementation

[0029] 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.

[0030] In this embodiment of the utility model,

[0031] A mini thermostat, such as Figures 1-7 As shown, the device includes a housing 24, which is snapped with a first threaded plate 1. The first threaded plate 1 is threadedly connected to a second threaded plate 2. A temperature sensing bulb 3 is disposed inside the housing 24. A threaded tube 4 is disposed inside the temperature sensing bulb 3. A pressing rod 5 is disposed inside the threaded tube 4. The lower end of the pressing rod 5 is circular and has an inwardly recessed arc-shaped groove 6. The second threaded plate 2 includes an annular plate 7 in the middle. The bottom of the annular plate 7 is provided with a through groove 8 for the pressing rod 5 to pass through and to fit with the lower end of the pressing rod 5.

[0032] The upper side of the temperature sensing bag 3 is provided with a feed hole 9 that penetrates the temperature sensing bag 3. The temperature sensing bag 3 is integrally connected to a feed channel 10 located at the feed hole 9. The feed channel 10 is provided with a sealing ball 11 for sealing.

[0033] The pressing rod 5 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 located in the second receiving groove 15. The limiting rod 16 is sleeved with an overpressure spring 17 located in the second receiving groove 15.

[0034] The annular plate 7 is circumferentially sleeved with a return spring 18 located in the circumferential direction of the lower rod 13.

[0035] The outer shell 24 is engaged with the first threaded plate 1 by a clamping plate 25. One end of the clamping plate 25 is integrally connected to an outwardly protruding convex plate 19. One end of the clamping plate 25 is provided with a circular groove 20 that penetrates the clamping plate 25. One end of the clamping plate 25 is integrally connected to an identification plate 21.

[0036] The outer casing 24 is provided with a plurality of marking blocks 22 in its circumference.

[0037] The first threaded plate 1 is provided with a circular hole 23 that penetrates the second threaded plate 2.

[0038] Working principle:

[0039] The rotating outer shell 24 drives the first threaded plate 1 to rotate. The first threaded plate 1 and the second threaded plate 2 are threadedly connected. During this process, the first threaded plate 1 moves along its own axis, thereby driving the temperature sensing bulb 3 to move. The movement of the temperature sensing bulb 3 drives the threaded tube 4 to move, thereby driving the pressing rod 5 to move to the required position. The lower end of the pressing rod 5 cooperates with the through groove 8 to restrict the rotation of the pressing rod 5, so that the pressing rod 5 can only move along its own length direction.

[0040] 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 miniature thermostat, comprising a housing (24), characterized in that: The outer shell (24) is snapped with a first threaded plate (1), and the first threaded plate (1) is threadedly connected to a second threaded plate (2). A temperature sensing bulb (3) is provided inside the outer shell (24), and a threaded tube (4) is provided inside the temperature sensing bulb (3). A pressing rod (5) is provided inside the threaded tube (4). The lower end of the pressing rod (5) is round and has an inwardly recessed arc-shaped groove (6). The second threaded plate (2) includes an annular plate (7) in the middle. The bottom of the annular plate (7) is provided with a through groove (8) for the pressing rod (5) to pass through and to fit with the lower end of the pressing rod (5).

2. The mini thermostat according to claim 1, characterized in that: The upper side of the temperature sensing bag (3) is provided with a feed hole (9) that penetrates the temperature sensing bag (3). The temperature sensing bag (3) is integrally connected with a feed channel (10) located at the feed hole (9). The feed channel (10) is provided with a sealing ball (11) for sealing.

3. The miniature thermostat according to claim 1, characterized in that: The pressing rod (5) includes an upper rod (12) and a lower rod (13) that are interlocked. 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) located in the second receiving groove (15). The limiting rod (16) is sleeved with an overpressure spring (17) located in the second receiving groove (15).

4. The miniature thermostat according to claim 1, characterized in that: The annular plate (7) is circumferentially sleeved with a circumferential return spring (18) located on the lower rod (13).

5. The miniature thermostat according to claim 1, characterized in that: The outer shell (24) is engaged with the first threaded plate (1) by a clamping plate (25). One end of the clamping plate (25) is integrally connected with an outwardly protruding convex plate (19). One end of the clamping plate (25) is provided with a circular groove (20) that penetrates the clamping plate (25). One end of the clamping plate (25) is integrally connected with an identification plate (21).

6. The miniature thermostat according to claim 1, characterized in that: The outer shell (24) is provided with a plurality of marking blocks (22) in the circumferential direction.

7. The miniature thermostat according to claim 1, characterized in that: The first threaded plate (1) is provided with a circular hole (23) that penetrates the second threaded plate (2).

Images