Double-sheet kick type temperature controller
By setting pad objects and temperature sensing holes in the thermostat, separating the bimetal disc and the action plate, and supporting components and resetting parts, the problem of reducing the temperature sensitivity of the thermostat in the prior art is solved, and the further development is achieved Accurate temperature sensing and circuit control.
Patent Information
- Application Number
- CN202421096125.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-17
AI Technical Summary
The existing bimetal disc thermostat cannot keep the circuit off after the temperature drops, resulting in a large deviation from the preset temperature of the thermostat. The setting of the action film reduces the sensitivity to ambient temperature. .
By setting up pad objects, separate the bimetal disc from the action plate, use a temperature sensing hole to directly conduct environmental heat to the bimetal disc, and ensure the stability and accuracy of the action plate through the support components and reset parts to avoid heat being passed by the action plate to prevent heat from being passed by the action plate. Absorption, improve temperature sensitivity.
It improves the sensitivity of the bimetal disc to ambient temperature, reduces the deviation between the actual jump temperature of the thermostat and the preset temperature, and ensures the accurate circuit disconnection and reset operation.
Smart Images
Figure CN222320094U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of thermostats, and in particular to a double-chip snap-action thermostat. Background Art
[0002] Thermostats are commonly found in household appliances. They sense the ambient temperature to control the on and off of the circuit. The snap-action thermostat senses the ambient temperature through a bimetallic disc. The bimetallic disc is composed of two different types of metal sheets with different thermal expansion coefficients. Therefore, it will deform at a specific temperature. The deformation action is used to change the internal structure of the thermostat, such as causing the moving contact and fixed contact inside the thermostat to separate, thereby disconnecting the thermostat circuit and then disconnecting the circuit connected to the thermostat, thus playing a safety protection role.
[0003] Since the bimetallic disc deforms according to the ambient temperature, when the bimetallic disc deforms at high temperature and disconnects the circuit, if the ambient temperature drops to a certain temperature, the bimetallic disc will deform again to return the circuit to the on state, that is, automatically reset. In some usage scenarios, such as preventing electric heaters from drying out, the thermostat will completely cut off the circuit after reaching a temperature jump and will not reset. To this end, the current solution is to stack an action piece on the bimetallic disc. When the temperature reaches a certain high temperature, the sudden jump of the bimetallic disc can cause the action piece to deform and change the internal structure of the thermostat. When the temperature drops, the bimetallic disc automatically resets without the action piece deforming, thereby keeping the circuit disconnected and not resetting.
[0004] However, in actual applications, it was found that the setting of the action piece would reduce the sensitivity of the bimetallic disc to the ambient temperature, causing a large deviation between the actual jump temperature of the thermostat and the preset temperature. Summary of the invention
[0005] In order to improve the sensitivity of the thermostat, the present application provides a double-chip snap-action thermostat.
[0006] The present application provides a double-chip snap-action thermostat that adopts the following technical solution:
[0007] A double-chip snap-action thermostat, comprising:
[0008] A shell, wherein the shell is provided with a cover, and a cushion is provided between the shell and the cover;
[0009] A fixed contact, the fixed contact being mounted on the housing;
[0010] A moving contact, the moving contact being mounted on the housing;
[0011] A support assembly, the support assembly being mounted on the housing and used to drive the moving contact to contact the fixed contact;
[0012] A moving part, used for driving the supporting assembly to move;
[0013] an action piece, the action piece being mounted on the housing and used for driving the moving part to slide;
[0014] A bimetallic disc is installed on the cushioning member, and a gap is left between the bimetallic disc and the action piece.
[0015] By adopting the above technical solution, the bimetallic disc and the action piece are both installed in the thermostat housing to form a double-piece snap-action thermostat. The traditional double-piece snap-action thermostat will stack the bimetallic disc on the action piece. The bimetallic disc is in direct contact with the action piece, and part of the heat of the bimetallic disc will be transferred to the action piece, causing a deviation in the bimetallic disc sensing temperature.
[0016] In comparison, the present application separates the bimetallic disc and the action piece by setting a pad, that is, before and after the deformation, the bimetallic disc and the action piece are not in direct contact, and the heat transferred to the bimetallic disc by the environment will not be absorbed by the action piece. Therefore, the sensitivity of the bimetallic disc will not be reduced even if the action piece is added. The bimetallic disc can sensitively sense the ambient temperature and make a sudden jump and flip action, thereby reducing the deviation between the actual sudden jump temperature of the thermostat and the preset temperature.
[0017] Optionally, the sealing cover is provided with a temperature sensing hole, and the bimetallic disc is connected to the outside of the temperature controller through the temperature sensing hole.
[0018] By adopting the above technical solution, the temperature sensing hole allows ambient heat to pass through the cover more easily and enter the interior of the thermostat without transferring heat through the cover, thereby reducing the cover's absorption of ambient heat, thereby directly transferring heat to the bimetallic disc and improving temperature sensitivity.
[0019] Optionally, the bimetallic disc partially extends into the temperature sensing hole.
[0020] By adopting the above technical solution, the bimetallic disc part structure is closer to the outside of the thermostat, so as to better absorb the ambient heat and further improve the temperature sensitivity.
[0021] Optionally, the cushion member is provided with a storage groove, and the edge of the bimetallic disc abuts against the side wall of the storage groove.
[0022] By adopting the above technical solution, the setting of the storage slot provides the bimetallic disc with supporting and limiting functions, restricting the movement of the bimetallic disc, so that the bimetallic disc deforms according to a predetermined trajectory, thereby improving the accuracy of the thermostat circuit conduction or disconnection action.
[0023] Optionally, the pad is installed on the cover, and the diameter of the temperature sensing hole is smaller than the diameter of the storage groove.
[0024] By adopting the above technical solution, the bimetallic disc can be installed simultaneously during the process of installing the cushion object on the cover, and the space between the edge of the cover and the storage slot can be used to further limit the bimetallic disc, thereby further improving the stability of the bimetallic disc.
[0025] Optionally, the outer shell is connected to a guide frame, the cover covers the guide frame, the cushion is located between the guide frame and the cover, the moving part is slidably installed on the guide frame, the guide frame is provided with a receiving groove, and the edge of the action piece abuts against the side wall of the receiving groove.
[0026] By adopting the above technical solution, the setting of the object-carrying groove provides the action piece with supporting and limiting functions, while the guide frame realizes the sliding installation of the moving part, making the action piece's driving action on the moving part more stable and smooth.
[0027] Optionally, the edge of the action piece is located between the cushioning member and the receiving groove.
[0028] By adopting the above technical solution, the action piece is further limited, thereby improving the stability of the action piece when it is flipped.
[0029] Optionally, the supporting assembly includes an elastic member, the moving contact is mounted on the elastic member, and one end of the moving member abuts against the elastic member.
[0030] By adopting the above technical solution, the elastic member provides elastic force, and the elastic force drives the moving contact to maintain contact with the fixed contact. After the action piece drives the moving member to slide, the elastic member can be pushed to deform and separate the moving contact from the fixed contact.
[0031] Optionally, the support assembly further includes a reset member, the reset member is passed through the shell, the reset member is slidably mounted on the shell, one end of the reset member abuts against the elastic member, and the reset member is used to drive the elastic member to deform.
[0032] By adopting the above technical solution, when the thermostat suddenly jumps, driving the reset member from the outside of the shell to move can drive the action to reset, thereby achieving the reset of the internal structure path of the thermostat.
[0033] In summary, this application has the following beneficial effects:
[0034] 1. The present application separates the bimetallic disc and the action piece by setting a pad, that is, before and after deformation, the bimetallic disc and the action piece are not in direct contact, and the heat transferred to the bimetallic disc by the environment will not be absorbed by the action piece. Therefore, the sensitivity of the bimetallic disc will not be reduced even if the action piece is added. The bimetallic disc can sensitively sense the ambient temperature and make a sudden jump and flip action, thereby reducing the deviation between the actual sudden jump temperature of the thermostat and the preset temperature.
[0035] 2. The present application also provides a temperature sensing hole, which allows ambient heat to pass through the cover more easily and enter the interior of the thermostat without transferring heat through the cover, thereby reducing the cover's absorption of ambient heat, thereby directly transferring heat to the bimetallic disc and improving temperature sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] Figure 1 It is a schematic diagram of the cross-sectional structure of the thermostat according to an embodiment of the present application.
[0037] Figure 2 It is a schematic diagram of the cross-sectional structure of the fixed contact and the moving contact of the embodiment of the present application.
[0038] Figure 3 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.
[0039] Description of reference numerals:
[0040] 1. Shell; 11. Guide frame; 12. Fixed contact; 13. Moving contact; 14. Moving part; 15. Terminal; 2. Receiving slot; 3. Padding part; 31. Storage slot; 4. Cover; 41. Temperature sensing hole; 5. Action piece; 6. Bimetallic disc; 7. Elastic part; 71. Reset part; 72. Press head. DETAILED DESCRIPTION
[0041] The following is combined with Figure 1-3 This application is described in further detail.
[0042] The present application embodiment discloses a double-chip snap-action thermostat. Figure 1 and Figure 2 As shown, a double-piece snap-action thermostat includes a housing 1, a fixed contact 12, a moving contact 13, a supporting assembly, a moving part 14, an action piece 5 and a bimetallic disc 6. The housing 1 is the structural basis of the thermostat, and the contact or separation of the fixed contact 12 and the moving contact 13 determines the state of the internal structural path of the thermostat.
[0043] The housing 1 is connected with a guide frame 11, and the housing 1 is an open structure at one end, and the guide frame 11 is fixedly connected to the opening of the housing 1. The fixed contact 12 is fixedly connected to the inner wall of the housing 1, and the support assembly is arranged on the housing 1. The support assembly includes an elastic member 7, and the elastic member 7 can be a spring or a spring. In this embodiment, the elastic member 7 is specifically a spring, and one end of the elastic member 7 is fixedly connected to the inner wall of the housing 1, and the moving contact 13 is fixedly connected to the other end of the elastic member 7. The elastic member 7 provides elastic force, and the elastic force drives the moving contact 13 to maintain contact with the fixed contact 12. The housing 1 is equipped with a plurality of terminals 15, and the fixed contact 12 and the moving contact 13 are respectively electrically connected to the corresponding terminals 15. When the moving contact 13 is in contact with the fixed contact 12, the internal circuit of the thermostat is in a pass state.
[0044] The moving part 14 is a rod-shaped structure, and the moving part 14 is inserted into the guide frame 11, and the moving part 14 is slidably installed on the guide frame 11, and one end of the moving part 14 abuts against the elastic member 7, and the sliding action of the moving part 14 can drive the elastic member 7 to deform. The guide frame 11 is provided with a receiving groove 2, and the receiving groove 2 is arranged in an annular shape. The edge of the action piece 5 is arranged in the receiving groove 2, and the edge of the action piece 5 abuts against the side wall of the receiving groove 2. The setting of the receiving groove 2 provides the action piece 5 with the function of supporting and limiting.
[0045] The action piece 5 is specifically a stainless steel sheet, and is in an arc shape. The action piece 5 does not deform due to temperature changes. The end of the moving part 14 away from the elastic part 7 is used to abut against the arc part of the action piece 5.
[0046] like Figure 1 and Figure 3 As shown, a cover 4 is sleeved on the outside of the guide frame 11, and the cover 4 covers the guide frame 11, and the cover 4 is sleeved and fixedly connected to a portion of the outer shell 1, and a cushion member 3 is arranged between the cover 4 and the guide frame 11, and the cushion member 3 is designed in an annular sheet shape, and the cushion member 3 is fixedly connected to the cover 4, and the cushion member 3 is provided with a storage groove 31, and the edge of the bimetallic disc 6 is arranged in the storage groove 31, and the edge of the bimetallic disc 6 abuts against the side wall of the storage groove 2, and the setting of the storage groove 31 provides the bimetallic disc 6 with supporting and limiting functions, thereby limiting the movement of the bimetallic disc 6, so that the bimetallic disc 6 is deformed according to a predetermined trajectory.
[0047] The bimetallic disc 6 is in the shape of an arc sheet. When the ambient temperature does not reach the preset temperature, the arc protruding directions of the bimetallic disc 6 and the action sheet 5 are both away from the moving part 14, and the edge of the action sheet 5 is located between the cushioning member 3 and the receiving groove 2. The cushioning member 3 realizes the separation of the action sheet 5 and the bimetallic disc 6, that is, there is a gap between the bimetallic disc 6 and the action sheet 5, the bimetallic disc 6 is not in direct contact with the action sheet 5, and the heat transferred from the environment to the bimetallic disc 6 will not be absorbed by the action sheet 5, thereby ensuring the sensitivity of the bimetallic disc 6 to temperature.
[0048] When the ambient temperature reaches the preset temperature, the bimetallic disc 6 deforms and suddenly flips, driving the action piece 5 to deform and suddenly flip. At this time, the arc protrusion directions of the bimetallic disc 6 and the action piece 5 are both facing the moving part 14. The flipping action of the action piece 5 drives the moving part 14 to slide, and then drives the elastic part 7 to deform, the moving contact 13 is separated from the fixed contact 12, and the passage inside the temperature controller is disconnected.
[0049] The cover 4 is provided with a temperature sensing hole 41, which is in the shape of a circular hole. The bimetallic disc 6 is connected to the outside of the thermostat through the temperature sensing hole 41, and the arc-shaped protruding part of the bimetallic disc 6 extends into the temperature sensing hole 41, so that the ambient heat can pass through the cover 4 and enter the inside of the thermostat through the temperature sensing hole 41, reducing the absorption of ambient heat by the cover 4 and improving the temperature sensitivity. For certain usage scenarios of the thermostat, the cover 4 of the thermostat will contact the heating surface of the heat source, so the temperature sensing hole 41 is set, and the top of the bimetallic disc 6 is basically flush with the temperature sensing surface of the cover 4, that is, the disc can directly contact the heating surface, thereby directly transferring heat to the bimetallic disc 6, and the temperature sensitivity is higher.
[0050] The diameter of the temperature sensing hole 41 is smaller than the diameter of the storage groove 31 , that is, the edge of the cover 4 located at the temperature sensing hole 41 forms a limit for the bimetallic disc 6 , and the space between the edge of the cover 4 and the storage groove 31 can further improve the stability of the bimetallic disc 6 .
[0051] In some embodiments, the support assembly also includes a reset member 71, which is arranged in a rod shape, passes through the outer shell 1, and is slidably installed on the outer shell 1. The sliding direction of the reset member 71 is parallel to the sliding direction of the moving member 14, and one end of the reset member 71 abuts against the elastic member 7.
[0052] When the ambient temperature drops, the bimetallic disc 6 that has flipped suddenly due to the high temperature will flip and reset. Since the action piece 5 does not deform due to temperature changes, the action piece 5 will not flip and maintain pressure on the moving part 14. The passage inside the thermostat is still in an open state.
[0053] In order to achieve the conduction of the passage inside the thermostat, the reset member 71 can be driven to move outside the thermostat, driving the moving member 14 to slide, pushing the action piece 5 to flip and reset, so that the elastic member 7 is no longer subjected to force and drives the fixed contact 12 and the moving contact 13 to abut against each other under the action of the reset elastic force, thereby achieving the conduction of the passage inside the thermostat.
[0054] In order to better drive the reset member 71 to move, a pressing head 72 is provided at the end of the reset member 71. The pressing head 72 has a large contact area, which is convenient for applying force to the reset member 71 and moving the reset member 71.
[0055] The implementation principle of a double-chip snap-action thermostat in the embodiment of the present application is:
[0056] The edge of the bimetallic disc 6 is connected between the cushion member 3 and the cover 4, so that the bimetallic disc 6 and the cover 4 can be fixed simultaneously during the process of installing the cushion member 3 on the cover 4. The cushion member 3 separates the bimetallic disc 6 from the action piece 5, and the heat transferred from the environment to the bimetallic disc 6 will not be absorbed by the action piece 5, so that the sensitivity of the bimetallic disc 6 will not be reduced when the action piece 5 is added.
[0057] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.
Claims
1. A double-chip snap-action thermostat, characterized in that: include: A shell (1), wherein the shell (1) is sleeved with a cover (4), and a cushion (3) is arranged between the shell (1) and the cover (4); A fixed contact (12), the fixed contact (12) being mounted on the housing (1); A moving contact (13), the moving contact (13) being mounted on the housing (1); a support assembly, the support assembly being mounted on the housing (1) and being used to drive the moving contact (13) to contact the fixed contact (12); A moving part (14) for driving the supporting assembly to move; an action piece (5), the action piece (5) being mounted on the housing (1) and being used to drive the moving part (14) to slide; A bimetallic disc (6), the bimetallic disc (6) is installed on the cushioning member (3), and a gap is left between the bimetallic disc (6) and the action piece (5).
2. A double-chip snap-action thermostat according to claim 1, characterized in that: The sealing cover (4) is provided with a temperature sensing hole (41), and the bimetallic disc (6) is connected to the outside of the temperature controller through the temperature sensing hole (41).
3. A double-chip snap-action thermostat according to claim 2, characterized in that: The bimetallic disc (6) partially extends into the interior of the temperature sensing hole (41).
4. A double-chip snap-action thermostat according to claim 3, characterized in that: The pad (3) is provided with a storage groove (31), and the edge of the bimetallic disc (6) abuts against the side wall of the storage groove (31).
5. A double-chip snap-action thermostat according to claim 4, characterized in that: The cushioning member (3) is mounted on the cover (4), and the diameter of the temperature sensing hole (41) is smaller than the diameter of the storage groove (31).
6. A double-chip snap-action thermostat according to claim 1, characterized in that: The shell (1) is connected to a guide frame (11), the cover (4) covers the guide frame (11), the cushion member (3) is located between the guide frame (11) and the cover (4), the moving member (14) is slidably mounted on the guide frame (11), the guide frame (11) is provided with a receiving groove (2), and the edge of the action piece (5) abuts against the side wall of the receiving groove (2).
7. A double-chip snap-action thermostat according to claim 6, characterized in that: The edge of the action piece (5) is located between the cushioning member (3) and the receiving groove (2).
8. A double-chip snap-action thermostat according to claim 1, characterized in that: The supporting assembly comprises an elastic member (7), the moving contact (13) is mounted on the elastic member (7), and one end of the moving member (14) abuts against the elastic member (7).
9. A double-chip snap-action thermostat according to claim 8, characterized in that: The support assembly further comprises a reset member (71), the reset member (71) being passed through the housing (1), the reset member (71) being slidably mounted on the housing (1), one end of the reset member (71) being in contact with the elastic member (7), and the reset member (71) being used to drive the elastic member (7) to deform.