A dual bimetallic strip temperature controller

Abstract

This utility model relates to a temperature controller, specifically a dual bimetallic strip temperature controller. It includes a housing, a support plate mounted on the side of the housing away from the passage mechanism, and a metal cover on the side of the support plate away from the housing. The metal cover encloses the support plate and is fixed to the outer wall of the housing. A magnetic rod through-hole is located in the middle of the support plate, and a ceramic rod is slidably disposed inside the magnetic rod through-hole. A receiving ring is fixed on the side of the support plate near the metal cover, and an outer ring is fixed on the outer edge of the receiving ring near the metal cover. 603 bimetallic strips and 602 bimetallic strips are stacked inside the outer ring. This utility model, by placing 603 and 602 bimetallic strips inside the outer ring, allows the 603 bimetallic strip to deform when the device reaches a specified temperature. When the 603 bimetallic strip fails, and the temperature at which the 602 bimetallic strip deforms is reached, the 602 bimetallic strip breaks the circuit of the passage mechanism, thus preventing a fire caused by an open circuit.

Description

Technical Field

[0001] This utility model relates to a temperature controller, specifically, to a dual bimetallic strip temperature controller. Background Technology

[0002] A temperature controller is a device that protects a circuit. It is a component that automatically controls the circuit to open or close or adjusts the operation of equipment based on changes in ambient temperature through physical deformation or changes in the state of electronic components, in order to maintain a set temperature range.

[0003] If the temperature controller fails during normal circuit operation, the circuit cannot be disconnected, which can cause the connected equipment to continue to heat up and potentially cause a fire. To prevent accidents caused by the temperature controller, a temperature controller with a higher breaking temperature is installed on the circuit as the last line of defense. When the temperature controller that controls the temperature fails, the temperature controller used for protection can also keep the temperature within a controllable range to prevent accidents and fires.

[0004] However, this method requires two temperature controllers to be installed in one circuit. In equipment with limited installation space, there is not enough space to install two temperature controllers. In this case, only one temperature controller can be installed. When the installed temperature controller fails, the electrical equipment may burn out due to high temperature because the temperature controller cannot control the temperature. Therefore, a temperature controller that can be installed in a way that simplifies installation is needed so that one temperature controller can control the temperature and protect the circuit. Utility Model Content

[0005] The purpose of this invention is to provide a dual bimetallic strip temperature controller to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides a dual bimetallic strip temperature controller, comprising a housing, an internal passage mechanism, a support plate mounted on the side of the housing away from the passage mechanism, a metal cover on the side of the support plate away from the housing, the metal cover enclosing the support plate and fixing it to the outer wall of the housing, a magnetic rod through-hole opening in the middle of the support plate, a ceramic rod slidably disposed inside the magnetic rod through-hole, a receiving ring platform fixed on the side of the support plate near the metal cover, an outer ring fixed on the outer edge of the receiving ring platform near the metal cover, and 603 bimetallic strips and 602 bimetallic strips stacked inside the outer ring, the 603 bimetallic strips and 602 bimetallic strips being made of the same metal material.

[0007] As a further improvement to this technical solution, the middle positions of both the 603 bimetallic sheet and the 602 bimetallic sheet protrude away from the support plate, and the height of the protrusion of the 602 bimetallic sheet is higher than the height of the protrusion of the 603 bimetallic sheet.

[0008] As a further improvement to this technical solution, one end of the ceramic rod is in contact with one side of the 602 bimetallic sheet, and the other end is in contact with the metal plate.

[0009] As a further improvement to this technical solution, the receiving ring protrudes upward on the side near the metal cover, and the edge of the 602 bimetallic sheet near the support plate contacts the protruding part of the receiving ring.

[0010] As a further improvement to this technical solution, a concave ring is fixed on one edge of the metal cover near the support plate, and several pressing balls are fixed in a ring array on the side wall of the concave ring near the support plate. The pressing balls are located at the corresponding position of the highest point of the protrusion of the receiving ring platform, and there is a gap between the pressing balls and the 603 bimetallic sheet.

[0011] As a further improvement to this technical solution, a base plate is fixedly installed at the end of the tube shell away from the support plate. A blocking groove is provided in the middle of the base plate. A manual reset mechanism is provided on the base plate. The manual reset mechanism includes a reset rod, which is slidably disposed inside the blocking groove. One end of the reset rod passes through the side of the base plate away from the support plate and is fixed with a pressing block. When the pressing block approaches the base plate, the reset rod pushes the metal plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This dual bimetallic strip temperature controller incorporates a 603 bimetallic strip and a 602 bimetallic strip within the outer ring. When the device reaches a specified temperature, the 603 bimetallic strip deforms. If the 603 bimetallic strip fails, and the temperature at which the 602 bimetallic strip deforms is reached, the 602 bimetallic strip breaks the circuit, preventing a fire caused by a short circuit. Furthermore, this device integrates normal temperature control and circuit protection, eliminating the need for two temperature controllers in the same circuit, reducing installation space, and allowing for temperature control and final protection even in devices that can only accommodate one temperature controller. This prevents damage from high temperatures and avoids fires. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2This is one of the schematic cross-sectional views of the overall structure of the utility model;

[0016] Figure 3 This is the second sectional view of the overall structure of the utility model;

[0017] Figure 4 This is an enlarged structural schematic diagram of point A of the utility model.

[0018] Figure 5 This is a schematic diagram of the passage mechanism structure of the utility model;

[0019] Figure 6 This is a schematic diagram of the bearing plate structure of the utility model;

[0020] Figure 7 This is a schematic diagram of the manual reset mechanism of the utility model.

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Tube shell; 11. Base plate; 2. Passage mechanism; 21. Blocking groove; 22. Short metal strip; 23. Long metal strip; 24. Metal plate; 25. Metal pin;

[0023] 3. Metal cap; 31. Fixing ear; 4. Ceramic rod; 5. 603 bimetallic strip; 6. 602 bimetallic strip; 7. Support plate; 71. Receiving ring platform; 72. Magnetic rod through-hole; 73. Outer ring; 8. Concave ring; 81. Pressing ball; 9. Manual reset mechanism; 91. Reset rod; 92. Press block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] 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", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Example 1

[0027] Please see Figures 1-7 As shown, this embodiment provides a dual bimetallic strip temperature controller, including a housing 1. A passage mechanism 2 is provided inside the housing 1. The passage mechanism 2 includes a short metal strip 22 and a long metal strip 23, which are symmetrically arranged relative to the center of the housing 1. One end of each metal strip extends from inside the housing 1 and is connected to a metal pin 25. The length of the long metal strip 23 is longer than that of the short metal strip 22, creating a height difference between them. A metal plate 24 is fixed to the short metal strip 22, with one end extending to one side of the long metal strip 23. Metal blocks are mounted on both the metal plate 24 and the long metal strip 23. Under normal use, the two metal blocks are in contact with each other, and the passage mechanism 2 is energized. When the two metal blocks separate, the passage mechanism 2 is open-circuited.

[0028] A support plate 7 is installed on the side of the tube shell 1 away from the passage mechanism 2. The support plate 7 is at one end of the tube shell 1. A base plate 11 is fixedly installed inside the tube shell 1 at the end away from the support plate 7. The base plate 11 is at the other end of the tube shell 1. The support plate 7 and the base plate 11 seal both ends of the tube shell 1. A magnetic rod through-hole 72 is opened in the middle of the support plate 7. A ceramic rod 4 is slidably arranged inside the magnetic rod through-hole 72. A metal cover 3 is provided on the side of the support plate 7 away from the tube shell 1. The metal cover 3 wraps the support plate 7 inside and is fixed to the outer wall of the tube shell 1. On the side of the support plate 7 near the metal cover 3 A receiving ring platform 71 is fixed, and an outer ring 73 is fixed to the outer edge of the receiving ring platform 71 near the metal cover 3. At the same time, a concave ring 8 is fixed to the edge of the metal cover 3 near the support plate 7. The concave ring 8 and one side of the outer ring 73 are in contact. The metal cover 3 presses the outer ring 73 so that one side of the outer ring 73 contacts one end side wall of the tube shell 1, so that the support plate 7 is fixed on the tube shell 1. At the same time, the edge of the metal cover 3 is fixed to the outer side wall of the tube shell 1. A fixing lug 31 is installed on the metal cover 3. The device is fixed in the designated position by screws passing through the fixing lug 31.

[0029] In current temperature controllers, a 603 bimetallic strip 5 is placed inside the outer ring 73, which can only control the temperature but cannot protect the circuit. In this case, a non-resettable temperature controller needs to be installed in the circuit. However, for devices with small internal space, such as kettle bases, the internal space is too small to install a second temperature controller. If the temperature controller installed inside the device fails, the device may be at risk of burning out due to high temperature, or even causing a fire.

[0030] The improvements in this solution are as follows:

[0031] Inside the outer ring 73, bimetallic strips 5 (603) and 602 (602) are stacked and arranged. Both bimetallic strips 5 and 602 are made of the same metal. The 602 bimetallic strip 6 is positioned between the 603 bimetallic strip 5 and the support plate 7. The middle portions of both bimetallic strips 5 and 602 protrude away from the support plate 7, and the protrusion height of the 602 bimetallic strip 6 is greater than that of the 603 bimetallic strip 5. The higher the protrusions of the 603 bimetallic strips 5 and 602 bimetallic strip 6, the greater the deformation during deformation. One end of the ceramic rod 4 contacts one side of the 602 bimetallic strip 6, and the other end contacts the metal plate 2. 4. The edge of the 602 bimetallic strip 6 contacts the receiving ring platform 71. To ensure that the contact between the receiving ring platform 71 and the 602 bimetallic strip 6 does not restrict the deformation of the 602 bimetallic strip 6, the side of the receiving ring platform 71 near the metal cover 3 protrudes upwards. The edge of the 602 bimetallic strip 6 near the support plate 7 contacts the protruding part of the receiving ring platform 71. At this time, the contact between the 602 bimetallic strip 6 and the receiving ring platform 71 changes from the original surface contact to line contact. When the 602 bimetallic strip 6 deforms, the receiving ring platform 71 will not block the deformation of the 602 bimetallic strip 6, making it more convenient for the 602 bimetallic strip 6 to deform.

[0032] Meanwhile, several pressing balls 81 are fixed in a ring array on the side wall of the concave ring 8 near the bearing plate 7. The pressing balls 81 are evenly arranged and are positioned at the corresponding positions of the highest points of the protrusions of the receiving ring platform 71. There is a gap between the pressing balls 81 and the 603 bimetallic strip 5. This gap is greater than the total thickness of the 603 bimetallic strip 5 and the 602 bimetallic strip 6 combined. That is, when the 603 bimetallic strip 5 and the 602 bimetallic strip 6 are placed between the bearing plate 7 and the metal cover 3, they are in a wobbly state. The pressing balls 81 and the receiving ring platform 71 have the same function. Here, the contact surface between the 603 bimetallic strip 5 and the concave ring 8 is adjusted to point contact, which is also to facilitate the deformation of the 603 bimetallic strip 5.

[0033] When this device is in use, the passage mechanism 2 is energized. The metal cover 3 senses the temperature and transmits it to the 603 bimetallic strip 5 and the 602 bimetallic strip 6. When the temperature reaches the deformation temperature of the 603 bimetallic strip 5, the 603 bimetallic strip 5 deforms. During the deformation, the 603 bimetallic strip 5 pushes the 602 bimetallic strip 6, causing the 602 bimetallic strip 6 to push the ceramic rod 4 to squeeze the metal plate 24, causing the two metal blocks to separate. At this time, the passage mechanism 2 is in an open circuit state. When the temperature sensed by the metal cover 3 decreases, the 603 bimetallic strip 5 returns to its original shape. After the 603 bimetallic strip 5 returns to its original shape, the 602 bimetallic strip 6 releases the squeeze on the ceramic rod 4, and the metal plate 24 resets itself through its own elasticity, causing the two metal blocks to stick together.

[0034] When the 603 bimetallic strip 5 malfunctions and cannot deform to control the temperature, the passage mechanism 2 cannot be disconnected. At this time, the temperature sensed at the metal cover 3 will continue to rise. When the temperature rises to the temperature at which the 602 bimetallic strip 6 deforms, the 602 bimetallic strip 6 deforms and pushes the ceramic rod 4, causing the ceramic rod 4 to push open the metal plate 24. At this time, the passage mechanism 2 is in a disconnected state.

[0035] After deformation, the bimetallic strip 6 will not recover under normal conditions, thus ensuring the open circuit state of the circuit mechanism 2 and preventing the two metal blocks from accidentally touching and reconnecting the circuit.

[0036] This setup reduces the need for two temperature controllers to control a circuit, eliminating the need for just one. This significantly reduces the space required to maintain both temperature control and protection functions, allowing even devices with limited internal space to achieve protection with just one temperature controller.

[0037] Meanwhile, the temperature controller designed using this solution can save on material and installation costs, as well as reduce the number of parts and save installation space, making it particularly suitable for devices with very limited installation space.

[0038] To ensure the continued use of the 602 bimetallic strip 6, a blocking groove 21 is provided in the middle of the base plate 11. A manual reset mechanism 9 is provided on the base plate 11. The manual reset mechanism 9 includes a reset rod 91, which is slidably disposed inside the blocking groove 21. One end of the reset rod 91 passes through the side of the base plate 11 away from the support plate 7 and is fixed with a button 92. When it is necessary to reset the 602 bimetallic strip 6, the user presses the button 92 to bring the button 92 closer to the base plate 11. When the push block 92 approaches the base plate 11, one end of the reset rod 91 contacts the side wall of the metal plate 24. Then, the reset rod 91 is pushed further to push the metal plate 24. At this time, the metal plate 24, which receives the push force from the reset rod 91, will move away from the base plate 11, so that the two metal blocks contact each other. At the same time, during the movement of the metal plate 24, it will push the ceramic rod 4, which will push the 602 bimetallic strip 6 to reset, thereby ensuring the normal use of the 602 bimetallic strip 6.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A double bimetallic strip temperature controller, comprising a housing (1), wherein a passage mechanism (2) is provided inside the housing (1), a support plate (7) is installed on the side of the housing (1) away from the passage mechanism (2), and a metal cover (3) is provided on the side of the support plate (7) away from the housing (1), the metal cover (3) enclosing the support plate (7) inside and fixing it to the outer wall of the housing (1), and a magnetic rod through-hole (72) is provided at the middle position of the support plate (7), wherein a ceramic rod (4) is slidably disposed inside the magnetic rod through-hole (72), characterized in that: The support plate (7) is fixed with a receiving ring platform (71) on the side near the metal cover (3). The outer edge of the receiving ring platform (71) near the metal cover (3) is fixed with an outer ring (73). 603 bimetallic strips (5) and 602 bimetallic strips (6) are stacked inside the outer ring (73). The 603 bimetallic strips (5) and 602 bimetallic strips (6) are made of the same metal material.

2. The dual bimetallic strip temperature controller according to claim 1, characterized in that: The middle portions of both the 603 bimetallic strip (5) and the 602 bimetallic strip (6) protrude away from the bearing plate (7), and the height of the protrusion of the 602 bimetallic strip (6) is higher than the height of the protrusion of the 603 bimetallic strip (5).

3. The dual bimetallic strip temperature controller according to claim 1, characterized in that: One end of the ceramic rod (4) is in contact with one side of the 602 bimetallic sheet (6), and the other end is in contact with the metal plate (24).

4. The dual bimetallic strip temperature controller according to claim 1, characterized in that: The receiving ring platform (71) protrudes upward on the side near the metal cover (3), and the edge of the 602 bimetallic sheet (6) near the support plate (7) contacts the protruding position of the receiving ring platform (71).

5. The dual bimetallic strip temperature controller according to claim 4, characterized in that: A concave ring (8) is fixed on one side edge of the metal cover (3) near the support plate (7). Several pressing balls (81) are fixed in a ring array on the side wall of the concave ring (8) near the support plate (7). The pressing balls (81) are set at the corresponding position of the highest point of the protrusion of the receiving ring platform (71). There is a gap between the pressing balls (81) and the 603 bimetallic sheet (5).

6. The dual bimetallic strip temperature controller according to claim 1, characterized in that: A base plate (11) is fixedly installed at the end of the tube shell (1) away from the support plate (7). A blocking groove (21) is provided in the middle of the base plate (11). A manual reset mechanism (9) is provided on the base plate (11). The manual reset mechanism (9) includes a reset rod (91). The reset rod (91) is slidably disposed inside the blocking groove (21). One end of the reset rod (91) passes through the side of the base plate (11) away from the support plate (7) and is fixed with a pressing block (92). When the pressing block (92) is close to the base plate (11), the reset rod (91) pushes the metal plate (24).

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