Bimetal temperature controller

Abstract

The utility model discloses a bimetallic temperature controller, which comprises a fixed seat, a reed assembly, a fixed contact piece, a bimetallic strip and a ceramic rice, the reed assembly is connected with the fixed seat, and the reed assembly is matched with a movable contact; the fixed contact piece is connected with the fixed seat, and the fixed contact piece is matched with a fixed contact which is in movable contact conduction with the movable contact. The first end of the bimetallic strip is connected with the fixed seat, and the second end of the bimetallic strip is connected with the reed assembly through the ceramic rice; the first end of the porcelain rice is connected with the reed assembly, and the second end of the porcelain rice is connected with the second end of the bimetallic strip; a concave-convex structure is formed on the surface of the porcelain rice. According to the utility model, the creepage distance between the bimetallic strip and the reed assembly can be effectively increased by forming the concave-convex structure on the surface of the porcelain rice, and the safety of the bimetallic temperature controller is further effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of thermostats, and in particular to a bimetallic thermostat. Background Technology

[0002] A bimetallic thermostat is a device that controls the on / off state of a circuit by utilizing the bending deformation of a bimetallic strip when heated. The bimetallic strip is made of two thin metal sheets with different coefficients of thermal expansion rolled together; one sheet has a higher coefficient of thermal expansion, and the other has a lower coefficient. At room temperature, the two metal sheets remain flat. As the temperature rises, the sheet with the higher coefficient of thermal expansion elongates more, causing the bimetallic strip to bend towards the sheet with the lower coefficient of thermal expansion. The higher the temperature, the more pronounced the bending. Conversely, when the temperature drops, the bimetallic strip contracts and returns to its original shape.

[0003] However, existing bimetallic thermostats have a problem: the creepage distance between the bimetallic strip and the spring with the moving contact is small, which cannot guarantee the safety of use.

[0004] In view of the above problems, it is necessary to study a bimetallic thermostat with good safety. Utility Model Content

[0005] The purpose of this invention is to provide a bimetallic thermostat with good safety.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] A bimetallic thermostat includes a fixed base, a reed assembly, a fixed contact, a bimetallic strip, and a ceramic chip. The reed assembly is connected to the fixed base and has a moving contact. The fixed contact is connected to the fixed base and has a stationary contact that makes active contact with the moving contact. A first end of the bimetallic strip is connected to the fixed base, and a second end of the bimetallic strip is connected to the reed assembly via the ceramic chip. A first end of the ceramic chip is connected to the reed assembly, and a second end of the ceramic chip is connected to a second end of the bimetallic strip. The surface of the ceramic chip has an uneven structure.

[0008] The convex-concave structure of the ceramic grain includes at least two protrusions that are separated along the axial direction of the ceramic grain, and a creepage ring groove located between adjacent creepage protrusions.

[0009] The diameters of the creepage convex rings may be the same or different.

[0010] The edges of the creepage ring are either rounded or right-angled.

[0011] The ceramic grain's uneven structure includes raised, spiral-shaped creepage protrusions and creepage recesses located between the loops of the creepage protrusions.

[0012] The reed assembly includes a first reed and a second reed. The first end of the first reed is connected to the fixed base, and the second reed is connected to the first reed. The first end of the second reed is engaged with the movable contact. The first end of the ceramic chip is connected to the second end of the first reed and the second end of the second reed.

[0013] The first end of the ceramic grain is inserted into the second end of the first spring and the second end of the second spring, and the second end of the ceramic grain is inserted into the second end of the bimetallic strip; the first end and the second end of the ceramic grain are respectively formed into sharp points.

[0014] The bimetallic thermostat also includes an adjustment component, which includes a bracket and an adjustment shaft that cooperates with the bracket. The bracket is connected to a fixed base, and the adjustment shaft abuts against the middle of the first spring.

[0015] The adjusting shaft includes a fine-tuning shaft and an adjusting magnetic column threadedly connected to the fine-tuning shaft. The fine-tuning shaft is rotatably fitted to the bracket, and the adjusting magnetic column abuts against the middle of the first spring.

[0016] The fixing base is equipped with multiple ceramic rings, each ceramic ring separating the first spring, the fixed contact, the bimetallic strip and the bracket.

[0017] After adopting the above solution, the surface of the ceramic grain of this utility model forms a concave-convex structure. This concave-convex structure can increase the surface area of ​​the ceramic grain, thereby effectively improving the creepage distance between the bimetallic strip and the spring assembly, and thus effectively improving the safety of the bimetallic thermostat of this utility model. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 (The first implementation method using ceramic rice).

[0019] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 (The first implementation method using ceramic rice).

[0020] Figure 3 This is an exploded view of the structure of this utility model (the first embodiment using ceramic rice).

[0021] Figure 4 This is a cross-sectional view of the present invention (using the first embodiment of ceramic rice).

[0022] Figure 5 This is a schematic diagram of the first embodiment of the ceramic rice of this utility model.

[0023] Figure 6 This is a schematic diagram of the second embodiment of the ceramic rice of this utility model.

[0024] Figure 7This is a structural schematic diagram of the third embodiment of the ceramic rice of this utility model.

[0025] Label Explanation:

[0026] Fixed base 1,

[0027] Reed assembly 2, first reed 21, second reed 22, moving contact 221,

[0028] Fixed contact piece 3, static contact 31,

[0029] Bimetallic strip 4,

[0030] Porcelain chip 5, tip 51, concave-convex structure 52, creepage protrusion 521, creepage protrusion 521', creepage ring groove 522, creepage recess 522'.

[0031] Adjustment component 6, bracket 61, adjustment shaft 62, fine-tuning shaft 621, adjustment magnetic column 622.

[0032] 7. Porcelain ring. Detailed Implementation

[0033] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0034] like Figures 1 to 7 As shown, this utility model discloses a bimetallic thermostat, which includes a fixed base 1, a spring assembly 2, a fixed contact 3, a bimetallic strip 4, and a ceramic element 5. The spring assembly 2 is connected to the fixed base 1 and has a moving contact 221. The fixed contact 3 is connected to the fixed base 1 and has a stationary contact 31 that makes active contact with the moving contact 221. The first end of the bimetallic strip 4 is connected to the fixed base 1, and the second end of the bimetallic strip 4 is connected to the spring assembly 2 via the ceramic element 5. The first end of the ceramic element 5 is connected to the spring assembly 2, and the second end of the ceramic element 5 is connected to the second end of the bimetallic strip 4. The working principle of this bimetallic thermostat is prior art and will not be elaborated further here.

[0035] Cooperate Figures 1 to 4 As shown, the reed assembly 2 includes a first reed 21 and a second reed 22. The first end of the first reed 21 is connected to the fixed base 1, and the second reed 22 is connected to the first reed 21. The first end of the second reed 22 is fitted with the movable contact 221, and the first end of the ceramic chip 5 is connected to the second end of the first reed 21 and the second end of the second reed 22. The first reed 21 and the second reed 22 are formed separately and then connected. It should be noted that the first reed 21 and the second reed 22 can also be integrally formed.

[0036] Cooperate Figures 1 to 4As shown, the bimetallic thermostat of this invention also includes an adjustment component 6. The adjustment component 6 includes a bracket 61 and an adjustment shaft 62 that cooperates with the bracket 61. The bracket 61 is connected to the fixed base 1. The adjustment shaft 62 abuts against the middle of the first spring 21. The adjustment shaft 62 is used to apply force to the first spring 21 to adjust the switching temperature of the bimetallic thermostat of this invention. The adjustment shaft 62 is located on the side of the first spring 21 away from the bimetallic sheet 4, while the fixed contact 3 can be located between the second spring 22 and the bimetallic sheet 4. The adjustment shaft 62 includes a fine-tuning shaft 621 and an adjustment magnetic column 622 that is threadedly connected to the fine-tuning shaft 621. The fine-tuning shaft 621 is rotatably fitted with the bracket 61. The adjustment magnetic column 622 abuts against the middle of the first spring 21. By rotating the fine-tuning shaft 621, the force applied by the adjustment magnetic column 622 to the first spring 21 can be adjusted.

[0037] Cooperate Figures 1 to 4 As shown, the fixed base 1 is equipped with multiple ceramic rings 7, each ceramic ring 7 separating the first spring 21, the fixed contact 3, the bimetallic strip 4 and the bracket 61, ensuring insulation between the first spring 21, the fixed contact 3, the bimetallic strip 4 and the bracket 61.

[0038] Cooperate Figures 1 to 4 As shown, the first end of the ceramic chip 5 is inserted into the second end of the first spring 21 and the second end of the second spring 22, and the second end of the ceramic chip 5 is inserted into the second end of the bimetallic strip 4; wherein, the first end and the second end of the ceramic chip 5 are respectively formed into a pointed tip 51 for insertion.

[0039] Cooperate Figures 1 to 7 As shown, the surface of the ceramic chip 5 of this invention has a concave-convex structure 52. This concave-convex structure 52 can increase the surface area of ​​the ceramic chip 5, thereby effectively improving the creepage distance between the bimetallic strip 4 and the spring assembly 2, and thus effectively improving the safety of the bimetallic thermostat of this invention.

[0040] Cooperate Figures 1 to 5 As shown, in the first embodiment of the ceramic rice 5 of this utility model, the concave-convex structure 52 of the ceramic rice 5 includes at least two protrusions and creepage protrusion rings 521 separated along the axial direction of the ceramic rice 5, and creepage ring grooves 522 located between adjacent creepage protrusion rings 521: the diameters of each creepage protrusion ring 521 are not the same, and the edges of the creepage protrusion rings 521 are rounded to avoid edge discharge and cuts.

[0041] Cooperate Figure 6As shown, in the second embodiment of the ceramic rice 5 of this utility model, the concave-convex structure 52 of the ceramic rice 5 also includes at least two protrusions and creepage protrusion rings 521 that are separated along the axial direction of the ceramic rice 5, and creepage ring grooves 522 located between adjacent creepage protrusion rings 521. The diameter of each creepage protrusion ring 521 is the same, and the edge of the creepage protrusion ring 521 is set at a right angle.

[0042] Cooperate Figure 7 As shown, in the third embodiment of the ceramic rice 5 of this utility model, the concave-convex structure 52 of the ceramic rice 5 includes a raised and spiral-shaped creepage protrusion 521' and a creepage recess 522' located between each ring of the creepage protrusion 521'.

[0043] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A bimetallic thermostat, comprising a fixed base, a reed assembly, a fixed contact, a bimetallic strip, and a ceramic chip; the reed assembly is connected to the fixed base and has a moving contact; the fixed contact is connected to the fixed base and has a stationary contact that makes active contact with the moving contact; a first end of the bimetallic strip is connected to the fixed base, and a second end of the bimetallic strip is connected to the reed assembly via a ceramic chip; a first end of the ceramic chip is connected to the reed assembly, and a second end of the ceramic chip is connected to a second end of the bimetallic strip; characterized in that: The surface of the ceramic grain has an uneven structure.

2. The bimetallic thermostat as described in claim 1, characterized in that: The convex-concave structure of the ceramic grain includes at least two protrusions that are separated along the axial direction of the ceramic grain, and a creepage ring groove located between adjacent creepage protrusions.

3. The bimetallic thermostat as described in claim 2, characterized in that: The diameters of the creepage convex rings may be the same or different.

4. The bimetallic thermostat as described in claim 2, characterized in that: The edges of the creepage ring are either rounded or right-angled.

5. The bimetallic thermostat as described in claim 1, characterized in that: The ceramic grain's uneven structure includes raised, spiral-shaped creepage protrusions and creepage recesses located between the loops of the creepage protrusions.

6. The bimetallic thermostat as described in claim 1, characterized in that: The reed assembly includes a first reed and a second reed. The first end of the first reed is connected to the fixed base, and the second reed is connected to the first reed. The first end of the second reed is engaged with the movable contact. The first end of the ceramic chip is connected to the second end of the first reed and the second end of the second reed.

7. The bimetallic thermostat as described in claim 6, characterized in that: The first end of the ceramic grain is inserted into the second end of the first spring and the second end of the second spring, and the second end of the ceramic grain is inserted into the second end of the bimetallic strip; the first end and the second end of the ceramic grain are respectively formed into sharp points.

8. The bimetallic thermostat as described in claim 6, characterized in that: It also includes an adjustment component, which includes a bracket and an adjustment shaft that cooperates with the bracket. The bracket is connected to a fixed base, and the adjustment shaft abuts against the middle of the first spring.

9. The bimetallic thermostat as described in claim 8, characterized in that: The adjusting shaft includes a fine-tuning shaft and an adjusting magnetic column threadedly connected to the fine-tuning shaft. The fine-tuning shaft is rotatably fitted to the bracket, and the adjusting magnetic column abuts against the middle of the first spring.

10. The bimetallic thermostat as described in claim 8, characterized in that: The fixing base is equipped with multiple ceramic rings, each ceramic ring separating the first spring, the fixed contact, the bimetallic strip and the bracket.

Images