Kick type temperature controller with automatic reset temperature control and manual reset temperature limiting functions
By designing independent contact pairs for automatic reset temperature control and manual reset temperature limit functions in the jump thermostat, the problem of temperature limit protection failure caused by contact adhesion in the prior art is solved, and safe and reliable Dual temperature protection function.
Patent Information
- Application Number
- CN202420610385.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-27
AI Technical Summary
When the existing jump temperature controller integrates the automatic reset temperature control function with the manual reset temperature limit function, the moving contact pair is prone to sticking due to frequent opening and closing, resulting in the failure of temperature limit protection and may cause safety accidents.
Design a jump-off thermostat, in which the automatic reset temperature control function module and the manual reset temperature limit function module use independent contact pairs to ensure that even if the contact pair of the automatic reset temperature control module is stuck, the manual reset temperature limit module is reset. The contact pair can still disconnect the circuit, achieving safe and reliable temperature limit protection.
It realizes automatic reset temperature control and manual reset temperature limit protection in the same thermostat, which reduces production costs, improves installation ease and use safety, and avoids the failure of temperature limit protection caused by contact adhesion.
Smart Images
Figure CN222281863U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sudden jump type thermostats, in particular to a sudden jump type thermostat with automatic reset temperature control and manual reset temperature limit. Background Art
[0002] The snap thermostat is a bimetallic disc thermostat, which is widely used in many household appliances such as coffee pots, water dispensers, water heaters, microwave ovens, electric heaters, portable electric water tanks, etc. for temperature control or temperature protection. Among them, the automatic reset thermostat is used for temperature control, and the manual reset temperature limiter is used for temperature protection. Most of the water heaters on the market currently use both the automatic reset thermostat and the manual reset temperature limiter to achieve the needs of automatic temperature control and over-temperature protection. According to the user's requirements for the convenience of installation and space miniaturization of the snap thermostat, the integration of the automatic reset thermostat and the manual reset temperature limiter can meet the user's needs, that is, a snap thermostat can achieve both automatic reset temperature control and manual reset over-temperature protection.
[0003] Chinese patent CN214672389U discloses an automatic reset temperature control and manual reset temperature limit type snap-action thermostat, which can organically integrate the automatic reset function of the thermostat and the manual reset function of the temperature limiter into one snap-action thermostat. However, since the automatic reset temperature control function module and the manual reset temperature limit function module both share the moving contact bracket 13 and the contact pair of the moving contact 12 and the fixed contact 11, and since the automatic reset temperature control function module needs to frequently operate the moving and fixed contact pairs, the opening and closing of the energized moving and fixed contacts will generate sparks. Over time, the moving and fixed contact pairs will have adhesion and other faults and cannot be disconnected. In this way, when the temperature continues to rise and reaches the time when the manual reset temperature limit function module is activated, the moving and fixed contact pairs cannot be disconnected, and the temperature limit protection fails, which may cause serious safety accidents. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a sudden jump type temperature controller with automatic reset temperature control and manual reset temperature limit, in which an automatic reset temperature control function module and a manual reset temperature limit function module are arranged in the same shell, and different contact pairs are used separately without interfering with each other; when the contact pair of the automatic reset temperature control function module fails to be disconnected due to adhesion or other faults, the contact pair of the manual reset temperature limit function module can still disconnect the circuit, thereby ensuring that the manual reset temperature limit protection is safe and reliable.
[0005] The technical solution proposed by the utility model is as follows:
[0006] A temperature controller with automatic reset temperature control and manual reset temperature limit type snap-action temperature controller, comprising a moving end terminal piece, a first rivet, a second rivet, a reset handle, a cover plate, a moving contact, a fixed end terminal piece, a fixed contact, a guide frame, a temperature control bimetallic disc, a temperature control transmission rod, a temperature limit transmission rod, a temperature limit bimetallic disc, a bracket, a cover, and a shell. The temperature control bimetallic disc is arranged in a cavity between the guide frame and the cover, a bracket is arranged between the guide frame and the shell, a temperature limit bimetallic disc is arranged in a space between the guide frame and the bracket, the outer periphery of the temperature limit bimetallic disc is in contact with the inner periphery of the bracket, the fixed end terminal piece is riveted to the shell through the second rivet, a temperature limit transmission rod is arranged between the shell and the temperature control transmission rod, the temperature control transmission rod movably penetrates the central through hole of the temperature limit bimetallic disc and the central through hole of the temperature limit transmission rod, and is movably in contact with the top surface of the temperature control bimetallic disc, the temperature control bimetallic disc and the control The temperature transmission rod constitutes the action mechanism of the automatic reset temperature control function module, the lower end face of the temperature limit transmission rod is movably contacted and connected with the top face of the temperature limit bimetallic disc, the second upper end face of the temperature limit transmission rod is contacted and connected with the reset handle, and a reset handle is set on the central through hole of the cover plate to constitute the reset mechanism of the manual reset temperature limit function module, the reset handle moves up and down along the central through hole of the cover plate and the central through hole of the temperature limit transmission rod, and is also provided with an intermediate contact, a temperature limit end spring sheet, a temperature control end spring sheet, a reinforcement plate and a riveting sheet, the moving end terminal sheet is riveted to the temperature control end spring sheet and the shell through the first rivet, the temperature limit end spring sheet is riveted to the shell through the riveting sheet, the reinforcement plate is welded and fixedly connected to the middle section of the temperature limit end spring sheet, the end of the temperature limit end spring sheet is provided with an intermediate contact, the first upper end face of the temperature limit transmission rod is contacted and connected with the reinforcement plate, the temperature limit bimetallic disc, the temperature limit transmission rod and the intermediate contact constitute the action mechanism of the manual reset temperature limit function module, and an intermediate contact is provided between the moving contact and the fixed contact to form two pairs of contact contact pairs.
[0007] The automatic reset temperature control function module is mainly composed of a temperature control bimetallic disc, a temperature control transmission rod, a temperature limiting end spring, a reinforcement plate and a temperature control end spring. A moving contact is provided at the right end of the temperature control end spring, and an intermediate contact is provided at the right end of the temperature limiting end spring. The moving contact and the intermediate contact form a first contact pair.
[0008] The manual reset temperature limit function module is mainly composed of a temperature limit bimetallic disc, a temperature limit transmission rod, a temperature limit end spring, a reinforcement plate, a fixed end wiring piece and a reset handle. A fixed contact is provided at the left end of the fixed end wiring piece, and the fixed contact and the middle contact form a second contact pair.
[0009] The centers of the moving contact, the middle contact and the fixed contact are all located on the same vertical line in the initial state.
[0010] Compared with the prior art, the utility model has the following beneficial effects:
[0011] The utility model organically combines the automatic reset temperature control function of the thermostat with the manual reset temperature limiting function of the temperature limiter. Only one thermostat is needed to realize the automatic reset temperature control function and the manual reset temperature limiting protection function, which greatly reduces the production cost of the product and improves the production efficiency. For users, the installation process of the thermostat is simplified and the use cost is reduced. The automatic reset temperature control module and the manual reset temperature limiting module of the utility model have their own independent contact pairs and their actuating mechanisms. Even if the first contact pair of the automatic reset temperature control module fails such as adhesion, it will not affect the manual reset temperature limiting module to cut off the circuit, thereby ensuring that the manual reset temperature limiting protection is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The utility model is a schematic structural diagram of a sudden jump type thermostat with automatic reset temperature control and manual reset temperature limit.
[0013] Figure 2 yes Figure 1 The schematic diagram of the structure of the sudden jump type thermostat when the first contact pair of the automatic reset temperature control module is disconnected.
[0014] Figure 3 yes Figure 1 The schematic diagram of the structure of the sudden jump thermostat is shown when the second contact pair is disconnected when the manual reset temperature limit module is actuated.
[0015] Figure 4 yes Figure 1 The schematic diagram of the position structure among the temperature-limiting transmission rod 15, the temperature-limiting end spring piece 3, the reinforcing plate 11, the middle contact 8, and the fixed contact 10 is shown.
[0016] Figure 5 yes Figure 1 The schematic diagram of the position structure between the temperature-limiting transmission rod 15, the reset handle 5, the temperature-limiting end spring 3, the reinforcement plate 11 and the middle contact 8 is shown.
[0017] Explanation of the numbers in the figure: 1. Moving end terminal lug; 2A. 1st rivet; 2B. 2nd rivet; 3. Temperature limiting end spring; 4. Temperature control end spring; 5. Reset handle; 6. Cover plate; 7. Moving contact; 8. Intermediate contact; 9. Fixed end terminal lug; 10. Fixed contact; 11. Reinforcement plate; 12. Guide frame; 13. Temperature control bimetallic disc; 14. Temperature control transmission rod; 15. Temperature limiting transmission rod; 15-1. Lower end surface; 15-2. 1st upper end surface; 15-3. 2nd upper end surface; 16. Temperature limiting bimetallic disc; 17. Bracket; 18. Riveted sheet; 19. Cover; 20. Shell. DETAILED DESCRIPTION
[0018] The utility model is further described in detail through the following examples.
[0019] See also Figure 1-5 As shown, a temperature-limiting type snap-action thermostat with automatic reset temperature control and manual reset temperature limit includes a moving end terminal piece 1, a first rivet 2A, a second rivet 2B, a reset handle 5, a cover plate 6, a moving contact 7, a fixed end terminal piece 9, a fixed contact 10, a guide frame 12, a temperature-control bimetallic disc 13, a temperature-control transmission rod 14, a temperature-limiting transmission rod 15, a temperature-limiting bimetallic disc 16, a bracket 17, a cover 19, and a shell 20. The temperature-control bimetallic disc 13 is arranged in a cavity between the guide frame 12 and the cover 19, and between the guide frame 12 and the shell 20. A bracket 17 is provided, and a temperature-limiting bimetallic disc 16 is provided in the space between the guide frame 12 and the bracket 17. The outer periphery of the temperature-limiting bimetallic disc 16 is in contact with the inner periphery 17-3 of the outer periphery of the bracket 17. The fixed end terminal piece 9 is riveted to the shell 20 through the second rivet 2B. A temperature-limiting transmission rod 15 is provided between the shell 20 and the temperature-control transmission rod 14. The temperature-control transmission rod 14 movably penetrates the central through hole of the temperature-limiting bimetallic disc 16 and the central through hole of the temperature-limiting transmission rod 15, and is movably in contact with the top surface of the temperature-control bimetallic disc 13. The temperature control The bimetallic disc 13 and the temperature control transmission rod 14 constitute the action mechanism of the automatic reset temperature control function module, the lower end surface 15-1 of the temperature limit transmission rod 15 is movably contacted and connected with the upper top surface of the temperature limit bimetallic disc 16, and the second upper end surface 15-3 of the temperature limit transmission rod 15 is contacted and connected with the reset handle 5. The reset handle 5 is set in the central through hole of the cover plate 6 to form the reset mechanism of the manual reset temperature limit function module. The reset handle 5 moves up and down along the central through hole of the cover plate 6 and the central through hole of the temperature limit transmission rod 15. There are also intermediate contacts 8, temperature limit end springs 3, and temperature control The end spring piece 4, the reinforcement plate 11 and the riveting piece 18, the moving end terminal piece 1 is riveted to the temperature control end spring piece 4 and the shell 20 through the first rivet 2A, the temperature limiting end spring piece 3 is riveted to the shell 20 through the riveting piece 18, the reinforcement plate 11 is welded and fixedly connected to the middle section of the temperature limiting end spring piece 3, and the end of the temperature limiting end spring piece 3 is provided with an intermediate contact 8, the first upper end face 15-2 of the temperature limiting transmission rod 15 is in contact with the reinforcement plate 11, the temperature limiting bimetallic disc 16, the temperature limiting transmission rod 15 and the intermediate contact 8 constitute the action mechanism of the manual reset temperature limiting function module, and an intermediate contact 8 is provided between the moving contact 7 and the fixed contact 10 to form two pairs of contact contact pairs.
[0020] The automatic reset temperature control function module is mainly composed of a temperature control bimetallic disc 13, a temperature control transmission rod 14, a temperature limiting end spring 3, a reinforcement plate 11 and a temperature control end spring 4. The right end of the temperature control end spring 4 is provided with a moving contact 7, and the right end of the temperature limiting end spring 3 is provided with an intermediate contact 8. The moving contact 7 and the intermediate contact 8 form a first contact pair.
[0021] The manual reset temperature limit function module is mainly composed of a temperature limit bimetallic disc 16, a temperature limit transmission rod 15, a temperature limit end spring 3, a reinforcement plate 11, a fixed end terminal piece 9 and a reset handle 5. A fixed contact 10 is provided at the left end of the fixed end terminal piece 9, and the fixed contact 10 and the middle contact 8 form a second contact pair.
[0022] The centers of the moving contact 7, the middle contact 8 and the fixed contact 10 are all located on the same vertical line in the initial state.
[0023] The bracket 17 is hollow and has an oblate basin shape with a reverse side, and its reverse side and the outer periphery are respectively matched and movably connected with the guide frame 12 and the housing 20. The function of the riveted sheet 18 is to fix the temperature-limiting end spring sheet 3 on the housing.
[0024] The working principle and working process of this sudden jump thermostat with automatic reset temperature control and manual reset temperature limit are as follows:
[0025] See also Figure 2 As shown, during the temperature rise process, when the temperature control bimetallic disc 13 senses the temperature action and turns upward, it drives the temperature control transmission rod 14 to push the temperature control end spring 4 upward, so that the moving contact 7 is separated from the middle contact 8. During the temperature drop process, when the temperature control bimetallic disc 13 senses the temperature and turns downward to restore the initial state, the temperature control transmission rod 14 and the temperature control bimetallic disc 13 resume the active contact connection state. At this time, the temperature control end spring 4 is no longer pushed upward by the temperature control transmission rod 14, and due to its own elasticity, it returns to its original state, and the moving contact 7 is reconnected with the middle contact 8.
[0026] See also Figure 3 As shown, during the temperature rising process, if the automatic reset temperature control function module fails and the temperature continues to rise, when the temperature limiting bimetallic disc 16 senses the temperature and flips upward, it drives the temperature limiting transmission rod 15 to push the reinforcement plate 11 and the temperature limiting end spring 3 upward, so that the middle contact 8 is separated from the fixed contact 10, thereby playing a role of over-temperature protection.
[0027] Since the automatic reset temperature control function module is often in operation, and the manual reset temperature limit function module is rarely in operation, the probability of the first contact pair composed of the moving contact 7 and the middle contact 8 having adhesion and other failures is much greater than the second contact pair composed of the middle contact 8 and the fixed contact 10. It can be considered that the probability of the second contact pair having adhesion is close to zero. When the first contact pair is adhered, and the temperature continues to rise, when the temperature-limiting bimetallic disc 16 senses the temperature and flips upward, it drives the temperature-limiting transmission rod 15 to push the reinforcement plate 11 and the temperature-limiting end spring 3 upward, so that the middle contact 8 with the moving contact 7 adhered to it is separated from the fixed contact 10, achieving the temperature-limiting protection effect.
Claims
1. A snap-action thermostat with automatic reset temperature control and manual reset temperature limit, comprising a moving end terminal lug (1), a first rivet (2A), a second rivet (2B), a reset handle (5), a cover plate (6), a moving contact (7), a fixed end terminal lug (9), a fixed contact (10), a guide frame (12), a temperature control bimetallic disc (13), a temperature control transmission rod (14), a temperature limit transmission rod (15), a temperature limit bimetallic disc (16), and a bracket (17) , a cover (19), and a shell (20), wherein the temperature-controlling bimetallic disc (13) is arranged in a cavity between the guide frame (12) and the cover (19), a bracket (17) is arranged between the guide frame (12) and the shell (20), and a temperature-limiting bimetallic disc (16) is arranged in a space between the guide frame (12) and the bracket (17), and the outer periphery of the temperature-limiting bimetallic disc (16) is in contact with the inner periphery (17-3) of the outer periphery of the bracket (17), and the fixed end connection The wire piece (9) is riveted to the housing (20) via a second rivet (2B), and a temperature-limiting transmission rod (15) is provided between the housing (20) and the temperature-control transmission rod (14). The temperature-control transmission rod (14) movably penetrates the central through hole of the temperature-limiting bimetallic disc (16) and the central through hole of the temperature-limiting transmission rod (15), and is movably contacted and connected with the upper top surface of the temperature-control bimetallic disc (13). The temperature-control bimetallic disc (13) and the temperature-control transmission rod (14) form an automatic reset The action mechanism of the temperature control function module, the lower end surface (15-1) of the temperature limit transmission rod (15) is movably contacted and connected with the upper top surface of the temperature limit bimetallic disc (16), the second upper end surface (15-3) of the temperature limit transmission rod (15) is contacted and connected with the reset handle (5), and the reset handle (5) is set in the central through hole of the cover plate (6) to form a reset mechanism of the manual reset temperature limit function module, and the reset handle (5) moves up and down along the central through hole of the cover plate (6), characterized in that: The invention also comprises an intermediate contact (8), a temperature-limiting end spring sheet (3), a temperature-controlling end spring sheet (4), a reinforcement plate (11) and a riveting sheet (18); the moving end terminal sheet (1) is riveted to the temperature-controlling end spring sheet (4) and the housing (20) through a first rivet (2A); the temperature-limiting end spring sheet (3) is riveted to the housing (20) through a riveting sheet (18); the reinforcement plate (11) is welded and fixedly connected to the middle section of the temperature-limiting end spring sheet (3); an intermediate contact (8) is provided at the end of the temperature-limiting end spring sheet (3); the first upper end surface (15-2) of the temperature-limiting transmission rod (15) is in contact with the reinforcement plate (11); the temperature-limiting bimetallic disc (16), the temperature-limiting transmission rod (15) and the intermediate contact (8) constitute an actuating mechanism of a manual reset temperature-limiting functional module; an intermediate contact (8) is provided between the moving contact (7) and the fixed contact (10) to form two pairs of contact pairs.
2. The snap-action thermostat with automatic reset temperature control and manual reset temperature limit according to claim 1, characterized in that: The automatic reset temperature control function module mainly comprises a temperature control bimetallic disc (13), a temperature control transmission rod (14), a temperature limiting end spring (3), a reinforcement plate (11) and a temperature control end spring (4); a moving contact (7) is provided at the right end of the temperature control end spring (4); an intermediate contact (8) is provided at the right end of the temperature limiting end spring (3); and the moving contact (7) and the intermediate contact (8) form a first contact pair.
3. The snap-action thermostat with automatic reset temperature control and manual reset temperature limit according to claim 1, characterized in that: The manual reset temperature-limiting function module mainly comprises a temperature-limiting bimetallic disc (16), a temperature-limiting transmission rod (15), a temperature-limiting end spring sheet (3), a reinforcing plate (11), a fixed end wiring sheet (9) and a reset handle (5); a fixed contact (10) is provided at the left end of the fixed end wiring sheet (9); the fixed contact (10) and the middle contact (8) form a second contact pair.
4. The snap-action thermostat with automatic reset temperature control and manual reset temperature limit according to claim 1, characterized in that: The center of the moving contact (7), the center of the intermediate contact (8) and the center of the fixed contact (10) are all located on the same vertical line in the initial state.