Liquid expansion type temperature controller
By using a hydraulic temperature sensing bulb and capillary tube closed cavity design and mechanical adjustment mechanism, the traditional temperature controller's slow response speed and low adjustment accuracy are solved, achieving fast response, high-precision temperature control and strong stability, making it suitable for complex industrial environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG AILONG ELECTRICAL APPLIANCES
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional temperature controllers have slow response speed, low adjustment accuracy, and are easily affected by environmental interference. In particular, they are not accurate in temperature control under high temperature or frequent operation scenarios. They are also complex in structure, large in size, high in cost, and lack stability.
It adopts a liquid expansion type temperature controller, which achieves rapid response and high-precision temperature control through the design of hydraulic temperature sensing bulb and capillary tube closed cavity, combined with mechanical adjustment mechanism. Spring-assisted diaphragm box reset is used to protect capillary tube. The separation of moving contact and stationary contact is directly driven by push rod, and spring design to relieve mechanical shock.
It achieves rapid response and high-precision temperature control, has a compact structure and strong anti-interference ability, is suitable for complex industrial environments, extends service life, and reduces costs.
Smart Images
Figure CN224153328U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a liquid expansion thermostat. Background Technology
[0002] Traditional temperature controllers mostly use electronic sensors or mechanical bimetallic strip structures, which have problems such as slow response speed, low adjustment accuracy, and susceptibility to environmental interference. Although some hydraulic temperature controllers achieve control by sensing liquid temperature, they have complex structures, large size, high cost, and insufficient stability. Especially in high temperature or frequent operation scenarios, they are prone to low temperature control accuracy and poor temperature consistency. Utility Model Content
[0003] To address the aforementioned problems, this utility model provides a liquid expansion thermostat, which has a compact structure, sensitive operation, and precise adjustment, and can achieve automated assembly, effectively solving the problems pointed out in the background art.
[0004] The technical solution adopted in this utility model is:
[0005] A liquid expansion thermostat includes a temperature sensing component, an adjustment mechanism, and a contact control component. The temperature sensing component includes a hydraulic temperature sensing bulb, a capillary tube, and a diaphragm. The hydraulic temperature sensing bulb, capillary tube, and diaphragm form a closed cavity, which encapsulates a temperature-sensing liquid. The diaphragm is divided into upper and lower parts. The upper part is connected to the adjustment mechanism via a diaphragm handle, and the lower part is fixed to a push rod. The contact control component includes a base, a stationary contact, a moving contact, and a spring. The spring is fixed to the end of the push rod, and the moving contact is fixed to the spring. The separation of the moving contact from the stationary contact is driven by the displacement of the push rod.
[0006] Preferably, the adjustment mechanism includes an adjustment shaft and an adjustment bolt. The lower end of the adjustment shaft is nested outside the diaphragm handle and is threadedly connected to the diaphragm handle. The adjustment bolt is nested inside the upper end of the adjustment shaft.
[0007] Preferably, a spring is provided on the outer side of the push rod, and the spring is located between the diaphragm box and the base. The upper end of the spring abuts against the bottom of the diaphragm box, and the lower end abuts against the base.
[0008] Preferably, the base is provided with a sleeve inside and at the point where the capillary enters the base, and the capillary is distributed inside the sleeve.
[0009] Preferably, the base is provided with a moving contact terminal and a stationary contact terminal on its exterior. The moving contact terminal is connected to the moving contact, and the stationary contact terminal is connected to the stationary contact.
[0010] This invention achieves rapid response, high-precision temperature control, and stable operation through the synergistic effect of hydraulic temperature sensing and mechanical adjustment. It has a compact structure and strong anti-interference ability, and is especially suitable for industrial scenarios with high temperature, frequent operation, or complex electromagnetic environment. It effectively solves the problems of contact sticking and insensitive reset of traditional temperature controllers. At the same time, this invention has a simple and compact structure, small size, few parts, and low cost.
[0011] The beneficial effects of this utility model are:
[0012] 1. High response speed and adjustment accuracy: Through the closed cavity design of the hydraulic temperature sensing bulb and capillary tube, the temperature sensing liquid can quickly sense temperature changes and transmit pressure to the diaphragm, reducing temperature transmission delay and improving response speed. The adjustment mechanism precisely controls the displacement of the push rod through the adjustment shaft to achieve fine adjustment of the temperature setting.
[0013] 2. Stability and Reliability: The spring on the outside of the push rod assists in the diaphragm reset, avoiding the problem of insensitive reset caused by material fatigue under high temperature or frequent operation; the guide tube protects the capillary from external damage, ensuring long-term stability;
[0014] 3. Strong anti-interference ability: The hydraulic temperature sensing method is less affected by environmental electromagnetic interference, and is more suitable for complex industrial environments compared with electronic sensors and mechanical bimetallic strip structures.
[0015] 4. Optimized contact control: The separation of the moving contact and the stationary contact is directly driven by the push rod. The spring design can alleviate mechanical shock, reduce the risk of contact sticking, and extend service life.
[0016] 5. The reed and spring together generate an upward elastic force on the push rod, which is used to make the moving contact and the stationary contact make contact to achieve conduction. At the same time, they provide a reset force when the moving contact is reset, which improves the stability of the overall structure and extends the service life.
[0017] 6. This utility model has a simple and compact structure, small size, few parts, and low cost. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a cross-sectional structural view of the present invention;
[0020] Figure 3 This is a schematic diagram of the structure of the top of the base of this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of the bottom of the base of this utility model;
[0022] Figure 5 for Figure 4A schematic diagram of the structure when the push rod is pushed downwards, causing the moving contact to separate from the stationary contact;
[0023] Figure 6 This is a schematic diagram of the contact control component.
[0024] Figure 7 This is a schematic diagram of the internal structure of the present invention;
[0025] Figure 8 This is a schematic diagram of the exploded structure inside the base. Detailed Implementation
[0026] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0028] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0032] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.
[0033] like Figure 1-8 As shown, a liquid expansion thermostat includes a temperature sensing component, an adjustment mechanism, and a contact control component. The temperature sensing component includes a hydraulic temperature sensing bulb 1, a capillary tube 2, and a diaphragm 3. The hydraulic temperature sensing bulb 1, capillary tube 2, and diaphragm 3 form a closed cavity, which encapsulates a temperature-sensing liquid. The diaphragm 3 is divided into upper and lower parts. The upper part is connected to the adjustment mechanism via a diaphragm handle 9, and the lower part is fixed with a push rod 4. The contact control component includes a base 5, a stationary contact 6, a moving contact 7, and a spring 8. The spring 8 is fixed to the end of the push rod 4, and the moving contact 7 is fixed to the spring 8. The separation of the moving contact 7 from the stationary contact 6 is driven by the displacement of the push rod 4.
[0034] The adjustment mechanism includes an adjustment shaft 10 and an adjustment bolt 11. The lower end of the adjustment shaft 10 is nested outside the diaphragm handle 9 and is threadedly connected to the diaphragm handle 9. The adjustment bolt 11 is nested inside the upper end of the adjustment shaft 10. A pressure plate 12 is fixed to the top of the base 5. The adjustment shaft 10 can be rotated to adjust the axial position of the diaphragm handle 9 within the adjustment shaft 10. The adjustment bolt 11 is used to adjust the upper limit position of the diaphragm handle 9 within the adjustment shaft 10.
[0035] The base 5 is provided with a sleeve 14 inside and at the point where the capillary tube 2 enters the base 5. The capillary tube 2 is distributed inside the sleeve 14. The sleeve 14 protects the capillary tube 2 from external damage and ensures long-term stability.
[0036] The base 5 is provided with a moving contact terminal 15 and a stationary contact terminal 16 on its exterior. The moving contact terminal 15 is connected to the moving contact 7, and the stationary contact terminal 16 is connected to the stationary contact 6.
[0037] The above is one embodiment of this utility model. The push rod 4 is pushed upward by the elastic force of the spring 8. Under the action of the spring 8, the moving contact 7 and the stationary contact 6 come into contact to achieve conduction. When the hydraulic temperature sensing bulb 1 is heated and the internal liquid expands, the lower half of the diaphragm 3 will overcome the elastic force of the spring 8 on the push rod 4, causing the push rod 4 to move downward. In this way, the moving contact 7 also moves downward, and finally the moving contact 7 separates from the stationary contact 6 to achieve disconnection.
[0038] To improve the stability of the push rod movement, this invention proposes another superior implementation by adding a spring 13. Specifically, a spring 13 is provided on the outside of the push rod 4, located between the diaphragm box 3 and the base 5. The upper end of the spring 13 abuts against the bottom of the diaphragm box 3, and the lower end abuts against the base 5. After adding the spring 13, the push rod 4 receives an upward thrust due to the elastic force of the spring plate 8 and the spring 13. Under the action of the spring plate 8 and the spring 13, the moving contact 7 contacts the stationary contact 6, achieving conductivity. When hydraulic pressure... When the temperature sensing bulb 1 is heated, causing the internal liquid to expand, the lower half of the diaphragm 3 will overcome the elastic force of the spring 8 and spring 13 on the push rod 4, causing the push rod 4 to move downward. This causes the moving contact 7 to move downward as well, eventually separating the moving contact 7 from the stationary contact 6, thus achieving disconnection. The spring 13 helps the diaphragm 3 to reset, avoiding the problem of insensitive reset caused by the fatigue of the spring 8 under high temperature or frequent operation. Even if the spring 8 is fatigued or the spring 13 fails, simply replacing the spring 13 will restore normal operation, extending the service life.
[0039] Working principle:
[0040] Temperature sensing stage: When the ambient temperature changes, the volume of the temperature-sensing liquid in the hydraulic temperature sensing bulb 1 expands or contracts accordingly (the physical change of thermal expansion and contraction). The pressure is transmitted to the diaphragm 3 through the capillary tube 2, which pushes the lower half of the diaphragm 3 to move, and the push rod 4 also moves accordingly.
[0041] Contact control stage: The displacement of push rod 4 drives spring 8 to move moving contact 7. When the temperature exceeds the set value, push rod 4 moves downward to separate moving contact 7 from stationary contact 6, cutting off the circuit. When the temperature decreases, the temperature-sensing liquid contracts, spring 13 assists diaphragm 3 to reset, push rod 4 moves upward to make moving contact 7 re-contact stationary contact 6, restoring circuit conduction.
[0042] This invention allows for adjustment of the power-off temperature as needed, as detailed below:
[0043] By rotating the adjusting shaft 10, the axial position of the diaphragm handle 9 within the adjusting shaft 10 is changed, thereby adjusting the initial positions of the diaphragm 3 and the push rod 4, specifically as follows:
[0044] Increase the power-off temperature: Adjust the diaphragm handle 9 upwards, and the push rod 4 also moves upwards. At this time, the displacement required for the push rod 4 to push the moving contact 7 to separate from the stationary contact 6 increases, that is, a higher ambient temperature is required to push the moving contact 7 to separate from the stationary contact 6.
[0045] Lower the power-off temperature: Adjust the diaphragm handle 9 downwards, and the push rod 4 also moves downwards. At this time, the displacement required for the push rod 4 to separate the moving contact 7 from the stationary contact 6 is reduced, that is, a lower ambient temperature is required to separate the moving contact 7 from the stationary contact 6.
[0046] Finally, it should be noted that the above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.
Claims
1. A liquid expansion type temperature controller, characterized in that, The device includes a temperature sensing component, an adjustment mechanism, and a contact control component. The temperature sensing component includes a hydraulic temperature sensing bulb (1), a capillary tube (2), and a diaphragm (3). The hydraulic temperature sensing bulb (1), capillary tube (2), and diaphragm (3) form a closed cavity. The cavity contains a temperature-sensing liquid. The diaphragm (3) is divided into upper and lower parts. The upper part is connected to the adjustment mechanism through a diaphragm handle (9), and the lower part is fixed with a push rod (4). The contact control component includes a base (5), a stationary contact (6), a moving contact (7), and a spring (8). The spring (8) is fixed to the end of the push rod (4), and the moving contact (7) is fixed on the spring (8). The separation of the moving contact (7) from the stationary contact (6) is driven by the displacement of the push rod (4).
2. A liquid expansion type temperature controller according to claim 1, wherein The adjustment mechanism includes an adjustment shaft (10) and an adjustment bolt (11). The lower end of the adjustment shaft (10) is nested outside the diaphragm handle (9) and is threadedly connected to the diaphragm handle (9). The adjustment bolt (11) is nested inside the upper end of the adjustment shaft (10).
3. A liquid expansion type temperature controller according to claim 1, wherein The push rod (4) is provided with a spring (13) on its outer side, and the spring (13) is located between the diaphragm box (3) and the base (5). The upper end of the spring (13) abuts against the bottom of the diaphragm box (3), and the lower end abuts against the base (5).
4. A liquid expansion type temperature controller according to claim 1, wherein The base (5) is provided with a sleeve (14) inside and at the point where the capillary (2) enters the base (5), and the capillary (2) is distributed inside the sleeve (14).
5. A liquid expansion type temperature controller according to claim 1, wherein The base (5) is provided with a moving contact terminal (15) and a stationary contact terminal (16) on its outside. The moving contact terminal (15) is connected to the moving contact (7), and the stationary contact terminal (16) is connected to the stationary contact (6).