High-sensitivity kick temperature controller

Abstract

The high-sensitivity kick temperature controller comprises a shell, a sealing cover and an installation cavity defined by the shell and the sealing cover in a matched mode, a bimetallic strip, a movable ejector rod, a moving contact and a static contact are arranged in the installation cavity, and the movable ejector rod can move to drive the moving contact to move relative to the static contact so that the moving contact and the static contact can abut against each other or be separated from each other. An elastic piece is arranged in the mounting cavity, the bimetallic strip is provided with an abutting area abutting against the elastic piece and a kick area tightly attached to the sealing cover under the action of the elastic piece, the abutting area is arranged on the periphery of the kick area, and the bimetallic strip has an initial state of being attached to the sealing cover and a triggering state of being far away from the sealing cover to trigger the movable ejector rod to act. The bimetallic strip can be tightly attached to the sealing cover under the action of the elastic piece before kick, contact type heat transfer between the sealing cover and the bimetallic strip is achieved, the whole temperature measuring process is high in temperature sensing speed and sensitivity, and when the temperature reaches the kick temperature of the bimetallic strip, the kick area can make a response rapidly to trigger the movable ejector rod to act.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of temperature controllers, and particularly relates to a high-sensitivity snap-action temperature controller. BACKGROUND

[0002] The existing common snap-action temperature controller is of a complete packaging structure, and has a certain gap between the packaging support and the bimetallic strip; or is of a non-complete packaging structure, and has an opening at the top of the packaging support, so that the bimetallic strip is exposed outside, and the bimetallic strip of the two structures is movable. The bimetallic strip, as a heat-sensitive reaction component, is one of the core components of the snap-action temperature controller. The bimetallic strip is usually made by laminating two metals with different expansion coefficients together. When the temperature changes, the bimetallic strip will produce a snap action due to the different expansion or contraction degrees of the two metals, so as to trigger the action of the action rod.

[0003] For the product adopting the contact heat transfer mode of the snap-action temperature controller, the gap between the packaging support and the bimetallic strip of the snap-action temperature controller with the complete packaging structure affects the slow temperature sensing of the bimetallic strip; the non-complete packaging type snap-action temperature controller is greatly limited in the waterproof, moisture-proof and dust-proof performance by the product pollution level, and the application range is greatly limited. For the product adopting the snap-action temperature controller, especially the product such as the snap-action temperature controller of the frying and roasting machine installed on the lower heating disc, the bimetallic strip of the snap-action temperature controller sinks due to gravity in the natural state, and the gap between the bimetallic strip and the packaging is large. After the snap-action temperature controller is installed on the heating disc, the temperature on the heating disc is transmitted to the bimetallic strip through the air, the temperature sensing is slow, the sensitivity is low, the heating disc of the whole machine is high in temperature, and the temperature amplitude of the whole machine is large. Therefore, the existing snap-action temperature controller is difficult to solve the problems of the heating disc temperature and the temperature amplitude at a high cost performance.

[0004] The existing technology discloses a temperature controller. The temperature controller has a box body, a conductive part installed in the box body, a first wiring terminal and a second wiring terminal. The first wiring terminal and the second wiring terminal are conducted through the conductive part. The box body has an upper cover and a base. An installation cavity is formed between the upper cover and the base. A face cover is installed at the bottom of the base. A bimetallic strip and a spring are installed between the base and the face cover. One end of the spring is supported on the bottom wall of the base, and the other end of the spring is supported on the central region of the bimetallic strip. The bimetallic strip can be tightly attached to the inner wall of the face cover through the elastic force of the spring. When installed, the face cover is tightly attached to the heating body to receive the heat of the heating body, so that the bimetallic strip is heated to generate internal stress and act, so as to drive the conductive part to move away from the first wiring terminal or the second wiring terminal, and realize electrical disconnection. However, the spring abuts against the central region of the bimetallic strip, and the central region of the bimetallic strip is the region most affected by temperature changes. When the bimetallic strip produces a snap action to trigger the action of the conductive part, the spring needs to overcome the elastic force, so that the sensitivity is reduced. CONTENT OF THE UTILITY MODEL

[0005] The application provides a high-sensitivity snap temperature controller to solve the technical problems of poor sensitivity and difficulty in solving the temperature and temperature amplitude of the heating element of the existing snap temperature controller.

[0006] The technical scheme adopted by the application is:

[0007] A high-sensitivity snap temperature controller, comprising a shell, a cover, and a mounting cavity formed by the shell and the cover, a bimetallic strip, a movable top rod, a movable contact, and a static contact are arranged in the mounting cavity, the movable top rod is movable to drive the movable contact to move relative to the static contact, so that the movable contact and the static contact abut or are separated, and an elastic member is further arranged in the mounting cavity, the bimetallic strip has an abutting area abutting against the elastic member and a snap area closely attached to the cover under the action of the elastic member, the abutting area is arranged at the outer periphery of the snap area, and the bimetallic strip has an initial state of being attached to the cover and a trigger state of being away from the cover to trigger the action of the movable top rod.

[0008] In the application, the abutting area abutting against the elastic member is arranged at the outer periphery of the snap area of the bimetallic strip, so that the bimetallic strip can be closely attached to the cover under the action of the elastic member before snapping, realizing contact heat transfer between the cover and the bimetallic strip, making the temperature sensing process fast and sensitive, and when the temperature reaches the snap temperature of the bimetallic strip, the snap area of the bimetallic strip can quickly respond to trigger the action of the movable top rod, realizing the synchronization of snapping and temperature control, and greatly reducing the risk of damage to the heating element. In addition, the arrangement of the elastic member can eliminate the gap that may be generated between the bimetallic strip and the cover in the initial state due to processing errors and assembly errors, so as to ensure the attachment between the bimetallic strip and the cover in the initial state. Furthermore, compared with the prior art in which the periphery of the bimetallic strip is in hard contact with the preset mounting position, in the application, the periphery of the bimetallic strip is installed in the preset mounting position in the mounting cavity through the elastic member, when the temperature rises to a temperature at which the bimetallic strip snaps, the periphery of the bimetallic strip will also deform, the arrangement of the elastic member provides flexible contact for the deformation of the periphery of the bimetallic strip, avoiding the deformation of the periphery of the bimetallic strip caused by hard contact, ensuring the stability of the mounting position of the bimetallic strip, and prolonging the service life of the bimetallic strip, thereby providing protection for the stable and reliable operation of the snap temperature controller.

[0009] The cover is provided with a recessed platform recessed towards the side away from the movable top rod, and in the initial state, the snap area is located in the recessed platform and attached to at least part of the area of the recessed platform.

[0010] In the technical solution, the recessed platform is arranged to make the cover closer to the temperature measuring element, and in the initial state, the jump area of the bimetallic strip is attached to at least part of the recessed platform, so that the temperature sensing speed of the jump temperature controller is faster, and the sensitivity is further improved, and the recessed platform can provide a limiting effect for the bimetallic strip to a certain extent, reducing the displacement of the bimetallic strip caused by deformation when the temperature changes, thereby ensuring long-term stable and reliable operation of the jump temperature controller.

[0011] The cover is provided with a limiting end face adjacent to the recessed platform, and the elastic member and the limiting end face cooperatively form a limiting layer, and in the triggered state, the abutting area abuts against the limiting end face to prevent the bimetallic strip from being detached from the limiting layer.

[0012] In the technical solution, the recessed platform is arranged to make the cover closer to the temperature measuring element, and in the initial state, the jump area of the bimetallic strip is attached to at least part of the recessed platform, so that the temperature sensing speed of the jump temperature controller is faster, and the sensitivity is further improved, and the recessed platform can provide a limiting effect for the bimetallic strip to a certain extent, reducing the displacement of the bimetallic strip caused by deformation when the temperature changes, thereby ensuring long-term stable and reliable operation of the jump temperature controller.

[0013] The bimetallic strip further has a transition area connecting the abutting area and the jump area, and the transition area is bent relative to the jump area, so that the thickness of the metal sheet on the side of the bimetallic strip facing the cover is greater than the thickness of the metal sheet on the side of the bimetallic strip facing the movable top rod.

[0014] The bimetallic strip is a structure made by laminating two metals with different expansion coefficients together, compared with the disc sheet type bimetallic strip structure, the bimetallic strip in the technical solution has a transition area connecting the abutting area and the jump area, so that the thickness of the metal sheet on the side of the bimetallic strip facing the cover is greater than the thickness of the metal sheet on the side of the bimetallic strip facing the movable top rod, the metal sheet on the side close to the cover has a greater thickness, which can greatly shorten the thermal reaction time, and the metal sheet on the side close to the cover has a larger thermal edge shape, which can ensure the accuracy of the jump action of the bimetallic strip, improve the timeliness of the movable top rod being triggered, and thus improve the temperature control effect.

[0015] The elastic member is a closed ring structure.

[0016] The elastic member is arranged as a closed ring structure, which can stably and elastically support the abutting area along the circumference of the bimetallic strip, so that the stress between each part of the abutting area of the bimetallic strip is balanced, and the problem of deformation of the abutting area caused by stress concentration in a single or local area is avoided.

[0017] The installation cavity is further provided with a guide frame, the guide frame is provided with a through hole for the movable top rod to move, and the guide frame is provided with a sunken area recessed away from the bimetallic strip.

[0018] The guide frame provides guidance for the movement of the movable top rod, ensuring that the movable contact can be triggered accurately. The sunken area of the guide frame provides a space for the bimetallic strip to jump and deform, which can reduce the false action caused by external factors such as vibration or impact, and improve the reliability of the jump temperature controller.

[0019] The installation cavity is further provided with a guide frame, the guide frame is provided with a through hole for the movable top rod to move, and the guide frame is provided with a sunken area recessed away from the bimetallic strip.

[0020] In the technical solution, the sunken area of the guide frame provides a fixed installation position for the elastic member, ensuring that the elastic member is correctly positioned in the jump temperature controller, so that the elastic member has a correct abutting position between the bimetallic strips, thereby providing a guarantee for the reliable operation of the jump temperature controller. In addition, the sunken area can also provide a certain limiting effect for the elastic member, preventing the elastic member from moving when the bimetallic strip jumps, and ensuring the installation position of the elastic member.

[0021] The thickness of the elastic member is less than the sunken depth of the sunken area, so that the abutting area is built into the sunken area.

[0022] In the technical solution, the thickness of the elastic member is less than the sunken depth of the sunken area, which limits the elastic member, so that the elastic member can more effectively apply force to the bimetallic strip when it is compressed or stretched, thereby enhancing the efficiency and response speed of the elastic member. The abutting area of the bimetallic strip is limited in the sunken area, which helps to reduce errors during assembly and ensures the correct cooperation between the bimetallic strip, the movable top rod and the elastic member, thereby improving the consistency and accuracy of assembly. Moreover, the design of the sunken area can more accurately control the deformation path of the bimetallic strip when it switches from the initial state to the triggered state, ensuring that the bimetallic strip can reliably drive the movable top rod when the temperature changes, thereby achieving accurate temperature control. In addition, the technical solution optimizes the space utilization inside the jump temperature controller, making the components more compact, which helps to reduce the overall size of the jump temperature controller while maintaining its functionality and efficiency.

[0023] The installation cavity is further provided with a reset member abutting against the movable contact, and the movable contact is closed or disconnected with the static contact under the pushing of the reset member; or the movable contact includes an elastic support and a movable contact piece arranged on the elastic support, and the movable contact piece can be reset to close or disconnect with the static contact under the action of the elasticity of the elastic support.

[0024] The technical scheme can make the movable contact head return to a state capable of being closed or disconnected with the static contact head when the bimetallic strip returns to the initial state, and the movable contact head and the static contact head return to be connected or disconnected, thereby ensuring normal operation of the product.

[0025] The installation cavity is further provided with a reset member abutting against the movable top rod, and the movable top rod moves in a direction away from the movable contact head under the pushing of the reset member.

[0026] The technical scheme can make the movable top rod move away from the movable contact head under the action of the reset member when the bimetallic strip returns to the initial state, and the hindering effect of the movable top rod on the movable contact head is eliminated, thereby providing a basis for reconnection or disconnection of the movable contact head and the static contact head. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and serve to explain the application without imposing undue limitation on the application. In the drawings:

[0028] Figure 1 is a sectional view of the snap-action temperature controller when the bimetallic strip is in the initial state according to an embodiment of the application;

[0029] Figure 2 is a sectional view of the snap-action temperature controller when the bimetallic strip is in the triggered state according to an embodiment of the application;

[0030] Figure 3 is an assembly schematic view of the guide frame and the elastic member according to an embodiment of the application;

[0031] Figure 4 is an assembly schematic view of the bimetallic strip according to an embodiment of the application.

[0032] wherein,

[0033] 1, bimetallic strip; 11, snap-action area; 12, abutting area; 13, transition area;

[0034] 2, elastic member;

[0035] 3, guide frame; 31, sink; 32, sunken area;

[0036] 4, movable contact head; 41, elastic support; 42, movable contact piece;

[0037] 5, static contact head;

[0038] 6, the jump gap;

[0039] 7, the shell;

[0040] 8, the movable top rod;

[0041] 9, the cover; 91, the concave table; 92, the limiting end face. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail with reference to the accompanying drawings.

[0043] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the application, but the application can also be implemented in other ways different from those described herein, therefore, the protection scope of the application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the application and the features in each embodiment can be combined with each other without conflict.

[0044] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation of the present application.

[0045] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection, or communication; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0047] As shown in Figure 1 and Figure 2 A high-sensitivity snap temperature controller includes a shell 7, a cover 9, and a mounting cavity formed by the shell 7 and the cover 9. A bimetallic strip 1, a movable top rod 8, a movable contact 4, and a stationary contact 5 are arranged in the mounting cavity. The movable top rod 8 is movable to drive the movable contact 4 to move relative to the stationary contact 5, so that the movable contact 4 and the stationary contact 5 abut or are separated. An elastic member 2 is arranged in the mounting cavity. The bimetallic strip 1 has an abutting area 12 abutting the elastic member 2 and a snap area 11 closely attached to the cover 9 under the action of the elastic member 2. The abutting area 12 is arranged at the outer periphery of the snap area 11. The bimetallic strip 1 has an initial state closely attached to the cover 9 and a trigger state away from the cover 9 to trigger the movable top rod 8 to act.

[0048] It should be noted that the naming of the snap area 11 and the abutting area 12 in the present application should not limit the deformation position of the bimetallic strip 1. When the temperature changes to cause the bimetallic strip 1 to deform, not only the snap area 11 will deform, but also the abutting area 12 will deform.

[0049] The application sets the abutting area 12 abutting with the elastic member 2 on the outer periphery of the jump area 11 of the bimetallic strip 1, so that the bimetallic strip 1 can be tightly attached to the cover 9 under the action of the elastic member 2 before jumping, realizing the contact heat transfer between the cover 9 and the bimetallic strip 1, so that the temperature sensing process is fast and sensitive, and when the temperature reaches the jump temperature of the bimetallic strip 1, the jump area 11 of the bimetallic strip 1 can quickly respond to trigger the action of the movable ejector pin 8, realizing the synchronization of jump and temperature control, and greatly reducing the risk of damage to the heating element. In addition, the setting of the elastic member 2 can eliminate the gap that may be generated between the bimetallic strip 1 and the cover 9 in the initial state due to processing errors and assembly errors, so as to ensure the fit between the bimetallic strip 1 and the cover 9 in the initial state. Furthermore, compared with the prior art technical solution that the periphery of the bimetallic strip is in hard contact with the preset installation position, in the application, the periphery of the bimetallic strip 1 is installed in the preset installation position in the installation cavity through the elastic member 2, and when the temperature rises to a temperature at which the bimetallic strip 1 jumps, the peripheral area of the bimetallic strip 1 will also deform. The setting of the elastic member 2 provides flexible contact for the deformation of the peripheral area of the bimetallic strip 1, avoids the deformation of the peripheral area of the bimetallic strip 1 caused by hard contact, ensures the stability of the installation position of the bimetallic strip 1, and prolongs the service life of the bimetallic strip 1, thereby providing protection for the stable and reliable operation of the jump temperature controller.

[0050] It should be noted that the triggered state in the application should be understood broadly, which refers to the state that the bimetallic strip 1 jumps and deforms to drive the movable ejector pin 8 to act. The movable ejector pin 8 has different movement positions in different action strokes, and the action stroke of the movable ejector pin 8 depends on the deformation degree of the bimetallic strip 1. For example, one movement position is that the movable ejector pin 8 is triggered but has not reached a position that can drive the movable contact 4 to move relative to the static contact 5. For another example, another movement position is that the movable ejector pin 8 is triggered and reaches a position that can drive the movable contact 4 to move relative to the static contact 5. As long as the movable ejector pin 8 moves under the deformation of the bimetallic strip 1, it is referred to as the movable ejector pin 8 being triggered.

[0051] When the snap-action temperature controller of this application is applied to different product types, the relationship between the moving contact 4 and the stationary contact 5 in the initial state of the bimetallic strip 1 is also different. In one embodiment, when the bimetallic strip 1 is in the initial state, the moving contact 4 and the stationary contact 5 are in a closed state. When the temperature of the object being measured reaches the snap-action temperature of the snap-action temperature controller, the bimetallic strip 1 undergoes a snap-action deformation to drive the movable push rod 8 to move. When the movable push rod 8 moves, it drives the moving contact 4 to move relative to the stationary contact 5, so that the moving contact 4 disengages from the stationary contact 5, and the control circuit between the two is disconnected. This type of snap-action temperature controller is particularly suitable for products such as grills. In another embodiment, when the bimetallic strip 1 is in the initial state, the moving contact 4 and the stationary contact 5 are in a closed state. When the temperature of the object being measured reaches the snap-action temperature of the snap-action temperature controller, the bimetallic strip 1 undergoes a snap-action deformation to drive the movable push rod 8 to move. When the movable push rod 8 moves, it drives the moving contact 4 to move relative to the stationary contact 5, so that the moving contact 4 abuts against the stationary contact 5, and the control circuit between the two is closed.

[0052] This application does not limit the connection method between the cover and the outer shell. Preferably, the cover 9 and the outer shell 7 are detachably connected, such as by screw connection, magnetic engagement, snap-fit, etc., to facilitate the maintenance of the snap-on temperature controller and the replacement of some parts after damage or failure.

[0053] The cap structure in this application can adopt any of the following embodiments:

[0054] Implementation method one: such as Figure 1 As shown, the cover 9 has a recessed platform 91 facing away from the movable push rod 8. In the initial state, the snap-action area 11 is located within the recessed platform 91 and is in contact with at least a portion of the recessed platform 91. In this embodiment, the recessed platform 91 allows the cover 9 to be closer to the temperature-measuring element. In the initial state, the snap-action area 11 of the bimetallic strip 1 is in contact with at least a portion of the recessed platform 91, thereby making the temperature sensing speed of the snap-action temperature controller faster and further improving its sensitivity. Moreover, the recessed platform 91 can provide a limiting effect for the bimetallic strip 1 to a certain extent, reducing the displacement of the bimetallic strip 1 caused by deformation when the temperature changes, thereby ensuring the long-term stable and reliable operation of the snap-action temperature controller.

[0055] Furthermore, such as Figure 2As shown, the cover 9 is provided with a limiting end face 92 adjacent to the recessed platform 91, and the elastic member 2 and the limiting end face 92 cooperatively form a limiting layer, and in the triggered state, the abutting area 12 abuts against the limiting end face 92 to prevent the bimetallic strip 1 from escaping from the limiting layer. The limiting end face 92 around the recessed platform 91 can cooperatively form the limiting layer with the elastic member 2, and the limiting layer provides space for the installation and deformation of the abutting area 12 of the bimetallic strip 1, and in the triggered state, the abutting area 12 can abut against the limiting end face 92, and the limiting end face 92 can prevent the bimetallic strip 1 from escaping from the limiting layer, thereby ensuring that the bimetallic strip 1 can be stably maintained at the preset installation position before and after the jump, so as to ensure the stable and reliable operation of the jump temperature controller.

[0056] Embodiment two: The embodiment two is not shown, and in the embodiment two, the top end face of the cover is a plane, which is not designed with a clear recessed platform 91 as in the embodiment one. In the initial state, at least the jump area is attached to the top end face of the cover.

[0057] In the present application, the structure of the bimetallic strip can adopt any one of the following embodiments:

[0058] Embodiment three: The embodiment three is not shown, and in the embodiment three, the bimetallic strip is a disc sheet structure. The thickness of the metal sheet on the side of the bimetallic strip facing the cover is equal to the thickness of the metal sheet on the side of the bimetallic strip facing the movable top rod.

[0059] Embodiment four: As shown in Figure 1 , Figure 2 and Figure 4 , the bimetallic strip 1 further has a transition area 13 connecting the abutting area 12 and the jump area 11, and the transition area 13 is bent relative to the jump area 11, so that the thickness of the metal sheet on the side of the bimetallic strip 1 facing the cover 9 is greater than the thickness of the metal sheet on the side of the bimetallic strip 1 facing the movable top rod 8. Preferably, in order to increase the attachment area between the bimetallic strip 1 and the cover 9 in the initial state, the jump area 11 is designed as a plane structure. The bimetallic strip 1 is a structure made by laminating two metal sheets with different expansion coefficients, and compared with the disc sheet structure of the bimetallic strip 1, the bimetallic strip 1 in the embodiment has a transition area 13 connecting the abutting area 12 and the jump area 11, so that the thickness of the metal sheet on the side of the bimetallic strip 1 facing the cover 9 is greater than the thickness of the metal sheet on the side of the bimetallic strip 1 facing the movable top rod 8. The thickness of the metal sheet on the side close to the cover 9 is greater, which can greatly shorten the thermal reaction time, and the thermal edge shape of the metal sheet on the side close to the cover 9 is greater, which can ensure the accuracy of the jump action of the bimetallic strip 1, improve the timeliness of the triggering of the movable top rod 8, and thereby improve the temperature control effect.

[0060] In the present application, the structure of the elastic member can adopt any one of the following embodiments:

[0061] In an embodiment, the elastic member 2 is a plurality of elastic supports arranged along the circumference of the abutting region 12.

[0062] For example, the elastic member 2 is a plurality of springs arranged along the circumference of the abutting region 12. For another example, the elastic member 2 is a plurality of elastic pads arranged along the circumference of the abutting region 12.

[0063] In an embodiment, the elastic member 2 is in a closed loop structure. The elastic member 2 can be an elastic pad in a loop shape. In this embodiment, the elastic member 2 is arranged in a closed loop structure, which can provide stable elastic support to the abutting region 12 along the circumference of the bimetallic strip 1, so that the stress between different parts of the abutting region 12 of the bimetallic strip 1 is balanced, and the problem of deformation of the abutting region 12 caused by stress concentration in a single or local area is avoided.

[0064] As a preferred embodiment of the present application, as shown in Figure 1 and Figure 2 a guide frame 3 is further arranged in the mounting cavity. The guide frame 3 is provided with a through hole for the movement of the movable plunger 8. The guide frame 3 is provided with a sunken area 32 recessed away from the bimetallic strip 1. In the triggered state, the bimetallic strip 1 deforms to at least partially enter the sunken area 32. In this embodiment, the guide frame 3 provides guidance for the movement of the movable plunger 8, ensuring that the movable contact 4 can be triggered accurately. The sunken area 32 of the guide frame 3 provides a movement space and a deformation path for the jump deformation of the bimetallic strip 1, which can reduce the false action caused by external factors (such as vibration or impact, etc.), and improve the reliability of the jump temperature controller.

[0065] In the initial state, the relative position relationship between the bimetallic strip 1 and the movable plunger 8 in this embodiment can adopt any one of the following embodiments:

[0066] Embodiment 1: As shown in Figure 1 in the initial state, there is a jump gap 6 between the jump region 11 and the movable plunger 8. When the bimetallic strip 1 switches from the initial state to the triggered state, the jump gap 6 is eliminated, the jump region 11 contacts the movable plunger 8 and drives the movable plunger 8 to move, so that the movable contact 4 is separated from the static contact 5, and the circuit is opened. Alternatively, when the bimetallic strip 1 switches from the initial state to the triggered state, the jump gap 6 is eliminated, the jump region 11 contacts the movable plunger 8 and drives the movable plunger 8 to move, so that the movable contact 4 is in abutment with the static contact 5, and the circuit is closed.

[0067] In this embodiment 2, as shown in FIG. 2, in the initial state, there is no gap between the bumping area and the movable ejector rod, i.e., the bumping area is in contact with the movable ejector rod in the initial state. In this way, the movable ejector rod can be triggered at the first time when the bimetallic strip deforms, further improving the timeliness of the response.

[0068] As a preferred embodiment of the present application, as shown in Figures 1 to 3 In this embodiment, the provision of the sink 31 on the guide frame 3 can provide a fixed mounting position for the elastic member 2, ensuring the correct positioning of the elastic member 2 in the bumping temperature controller, so that the elastic member 2 has the correct abutting position between the bimetallic strips 1, thereby providing a guarantee for the reliable operation of the bumping temperature controller. In addition, the provision of the sink 31 can also provide a certain limiting effect for the elastic member 2, avoiding displacement of the elastic member 2 when the bimetallic strips 1 bump, ensuring the installation position of the elastic member 2.

[0069] Further, the width of the elastic member 2 is less than or equal to the width of the sink 31, so that the elastic member 2 can be stably carried at the position of the sink 31. When the bimetallic strips 1 bump and deform, their action will bring a certain impact to the elastic member 2. By setting the width of the elastic member 2 to be less than or equal to the width of the sink 31, the elastic member 2 can still be stably maintained at the preset installation position when it is impacted.

[0070] As a preferred embodiment of the present embodiment, as shown in Figure 3 In this embodiment, the design of the elastic member 2 with a thickness less than the sinking depth of the sink 31 can limit the elastic member 2, so that the elastic member 2 can more effectively exert force on the bimetallic strips 1 when it is compressed or stretched, enhancing the efficiency and response speed of the elastic member 2. The abutting area 12 of the bimetallic strips 1 is limited within the sink 31, which helps to reduce errors in the assembly process and ensures the correct cooperation of the bimetallic strips 1 with the movable ejector rod 8 and the elastic member 2, improving the consistency and accuracy of the assembly. Moreover, the design of the sink 31 can more accurately control the deformation path of the bimetallic strips 1 when switching from the initial state to the triggered state, ensuring that the bimetallic strips 1 can reliably drive the movable ejector rod 8 when the temperature changes, to achieve accurate temperature control. In addition, this embodiment optimizes the space utilization inside the bumping temperature controller, making the components more compact, which helps to reduce the overall size of the bumping temperature controller while maintaining its functionality and efficiency.

[0071] As another embodiment of the present embodiment, which is not shown in the drawings, the thickness of the elastic member is equal to or greater than the sinking depth of the sink, so that the abutting area is outside the sink. In order to avoid displacement of the bimetallic strip during assembly, other structures for limiting the bimetallic strip can be provided on the guide frame and / or the cover.

[0072] When the bimetallic strip returns to the initial state from the triggered state, the reset of the movable contact can adopt any of the following embodiments:

[0073] Embodiment seven: This embodiment is not shown in the drawings. In this embodiment, a reset member for abutting against the movable contact is further arranged in the mounting cavity, and the movable contact is closed or disconnected with the static contact under the pushing of the reset member. When the movable contact moves, the movable plunger can be reset synchronously, so that the movable plunger returns to a state capable of being triggered again. In this embodiment, by arranging the reset member for resetting the movable plunger in the mounting cavity, when the temperature drops to a certain threshold value and the bimetallic strip returns to the initial state, the movable contact can be stably restored to a state capable of being closed or disconnected with the static contact, and the movable contact and the static contact are restored to be connected or disconnected, thereby ensuring the normal operation of the product.

[0074] Embodiment eight: As shown in Figure 1 and Figure 2 The movable contact 4 includes an elastic support 41 and a movable contact piece 42 arranged on the elastic support 41, and the movable contact piece 42 can be reset to be closed or disconnected with the static contact 5 under the action of the elasticity of the elastic support 41 itself. When the movable contact piece 42 moves, the movable plunger 8 can be reset synchronously, so that the movable plunger 8 returns to a state capable of being triggered again. In this embodiment, the movable contact piece 42 is arranged on the elastic support 41 to be reset by the elasticity of the elastic support 41 itself, so that when the temperature drops to a certain threshold value and the bimetallic strip 1 returns to the initial state, the movable contact 4 can be stably restored to a state capable of being closed or disconnected with the static contact, and the movable contact 4 and the static contact 5 are restored to be connected or disconnected, thereby ensuring the normal operation of the product.

[0075] Embodiment nine: This embodiment is not shown in the drawings. In this embodiment, a reset member for abutting against the movable plunger is further arranged in the mounting cavity, and the movable plunger moves away from the movable contact under the pushing of the reset member. The movable contact includes an elastic support and a movable contact piece arranged on the elastic support, and the movable contact piece can be reset to be closed with the static contact under the action of the elasticity of the elastic support itself. In this embodiment, by arranging the reset member for resetting the movable plunger in the mounting cavity, when the bimetallic strip returns to the initial state, the movable plunger moves away from the movable contact under the action of the reset member, and the hindering effect of the movable plunger on the movable contact is eliminated, thereby providing a basis for the reconnection or disconnection of the movable contact and the static contact.

[0076] The matters not mentioned in the present application can be realized by using or referring to the existing technology.

[0077] The various embodiments described in this specification are presented by way of example, and each embodiment is not necessarily composed of all features described with respect to other embodiments. Each embodiment is directed to the differentiating features from other embodiments.

[0078] The above merely provides an example of the present application, and is not intended to limit the present application. The technical features or structures in the foregoing different embodiments can be combined as needed to form other specific technical solutions. Various modifications and changes can be made by those skilled in the art based on the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A high-sensitivity snap-action temperature controller, comprising a housing, a cover, and a mounting cavity formed by the housing and the cover, wherein the mounting cavity contains a bimetallic strip, a movable push rod, a moving contact, and a stationary contact, the movable push rod being movable to drive the moving contact to move relative to the stationary contact, so that the moving contact and the stationary contact abut or disengage, characterized in that, The installation cavity is further provided with an elastic member, the bimetallic strip has an abutting area abutting against the elastic member and a jumping area closely abutting against the cover under the action of the elastic member, the abutting area is arranged at the outer periphery of the jumping area, and the bimetallic strip has an initial state of abutting against the cover and a triggered state of moving away from the cover to trigger the action of the movable ejector.

2. The high-sensitivity jumping temperature controller according to claim 1, characterized in that, the cover is provided with a concave platform recessed towards the side away from the movable ejector, and in the initial state, the jumping area is located in the concave platform and abuts against at least part of the concave platform.

3. The high-sensitivity jumping temperature controller according to claim 2, characterized in that, the cover is provided with a limiting end face adjacent to the concave platform, the elastic member and the limiting end face cooperatively form a limiting layer, and in the triggered state, the abutting area abuts against the limiting end face to prevent the bimetallic strip from being separated from the limiting layer.

4. The high-sensitivity jumping temperature controller according to claim 1, characterized in that, the bimetallic strip further has a transition area connecting the abutting area and the jumping area, the transition area is bent relative to the jumping area, so that the thickness of the metal sheet on the side of the bimetallic strip facing the cover is greater than the thickness of the metal sheet on the side of the bimetallic strip facing the movable ejector.

5. The high-sensitivity jumping temperature controller according to claim 1, characterized in that, the elastic member is in a closed ring structure.

6. The high-sensitivity jumping temperature controller according to claim 1, characterized in that, the installation cavity is further provided with a guide frame, the guide frame is provided with a through hole for the movable ejector to move in, and the guide frame is provided with a sunken area recessed away from the bimetallic strip, and in the triggered state, the bimetallic strip deforms to at least partially enter the sunken area.

7. The high-sensitivity jumping temperature controller according to claim 1, characterized in that, the installation cavity is further provided with a guide frame, the guide frame is provided with a through hole for the movable ejector to move in, and the guide frame is further provided with a sunken platform, and the elastic member is arranged in the sunken platform.

8. The high-sensitivity jumping temperature controller according to claim 7, characterized in that, the thickness of the elastic member is less than the sunken depth of the sunken platform, so that the abutting area is arranged in the sunken platform.

9. The high-sensitivity jumping temperature controller according to any one of claims 1 to 8, characterized in that, the installation cavity is further provided with a reset member abutting against the movable contact, and the movable contact is closed or disconnected with the static contact under the pushing of the reset member; alternatively, the movable contact comprises an elastic support and a movable contact piece arranged on the elastic support, and the movable contact piece can be reset to be closed or disconnected with the static contact under the action of the elasticity of the elastic support itself.

10. The high-sensitivity jumping temperature controller according to any one of claims 1 to 8, characterized in that, the installation cavity is further provided with a reset member abutting against the movable ejector, and the movable ejector moves towards the side away from the movable contact under the pushing of the reset member.

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