Direct-current kick type temperature limiter with magnetic quenching function

Abstract

The utility model relates to the technical field of temperature limiters, in particular to a direct-current kick type temperature limiter with a magnetic quenching function, which comprises a temperature sensing type power assembly, a lifting rod and a contact type switch assembly which are mounted at an opening at the upper end of a base in a covering manner, the inner wall of the base is equally provided with a plurality of separation parts, adjacent separation parts form a separation space for installing the contact switch sub-assembly, and the lower surface of the base corresponding to the contact switch sub-assembly is provided with a corresponding terminal sub-assembly in a penetrating manner; the temperature sensing type power assembly is used for controlling the lifting rod to move up and down so as to control contact conduction or separation disconnection of the contact type switch assembly. And the separation part is provided with a magnet for forming an arc extinguishing magnetic field so as to carry out magnetic quenching on electric arcs generated by contact conduction or separation disconnection of the plurality of groups of contact switch sub-assemblies. According to the utility model, by means of increasing the number of the terminals, optimizing the layout, adopting the magnetic quenching technology and the like, the use limitation of the existing temperature limiter is solved, so that the temperature control requirement of temperature control equipment is better met.

Description

Technical Field

[0001] This utility model relates to the field of temperature limiter technology, and in particular to a DC snap-type temperature limiter with magnetic blowout arc extinguishing function. Background Technology

[0002] Thermostats play a crucial role under normal operating conditions, ensuring that the operating temperature of the equipment is strictly controlled within a certain range below or above a specific value, thereby preventing equipment damage or safety hazards caused by excessively high or low temperatures. Thermostats are especially indispensable in household appliances such as electric water heaters. However, traditional control methods often have some shortcomings.

[0003] In existing designs for controlling the three heating elements of electric water heaters, only one set of temperature limiters is typically used. While this design can meet basic temperature control requirements to some extent, the limited number of terminals simplifies circuit connection and control, but also restricts its flexibility and reliability. Under complex temperature control requirements, this design may not provide sufficient accuracy and response speed.

[0004] More importantly, when the temperature limiter generates an electric arc at the moment of disconnection, it can damage the limiter itself, thus affecting its service life. An electric arc is a momentary discharge phenomenon caused by the inability of current to dissipate immediately upon disconnection. It generates high temperatures and intense light, damaging surrounding materials and structures. In a temperature limiter, the generation of an electric arc not only leads to ablation and deformation of the contact surface but can also cause short circuits and open circuits in the internal circuitry, thereby shortening the temperature limiter's lifespan. Utility Model Content

[0005] The purpose of this invention is to propose a DC snap-type temperature limiter with magnetic blowout arc extinguishing function. By increasing the number of terminals, optimizing the layout, and adopting magnetic blowout arc extinguishing technology, the limitations of existing temperature limiters can be solved, thereby better meeting the temperature control needs of equipment such as electric water heaters.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A DC snap-action temperature limiter with magnetic blowout arc extinguishing function includes a base;

[0008] The upper opening of the base is covered and fitted with a temperature-sensitive power assembly. The driving end of the temperature-sensitive power assembly is equipped with a lifting rod, and the bottom end of the lifting rod is provided with a contact switch assembly.

[0009] The contact switch assembly includes multiple sets of contact switch subassemblies and multiple sets of terminal subassemblies;

[0010] The inner wall of the base is equally divided into multiple partitions. The multiple partitions extend toward the center of the base and are not connected to each other. Adjacent partitions form a partition space. The partition space is used to install the contact switch sub-assembly. A corresponding terminal sub-assembly is provided on the lower surface of the base corresponding to the contact switch sub-assembly. The terminal sub-assembly and the contact switch sub-assembly are electrically connected one-to-one through a connecting component.

[0011] The temperature-sensitive power assembly is used to control the up-and-down movement of the lifting rod, and the up-and-down movement of the lifting rod is used to control the contact switch assembly to make or break contact.

[0012] The partition is provided with a mounting groove, and a magnet is installed in the mounting groove;

[0013] Multiple magnets are used to form an arc-extinguishing magnetic field with the same magnetic field direction, so as to extinguish the arc generated by the contact switching sub-assemblies of multiple sets by magnetic blowing.

[0014] Preferably, the contact switch sub-assembly includes a U-shaped spring and a sector-shaped connecting piece;

[0015] The U-shaped spring is placed horizontally, and a moving contact is provided at the upper end of the U-shaped spring. One end of the fan-shaped connecting piece is provided with a stationary contact. The moving contact is located below the stationary contact, and the moving contact and the stationary contact are arranged opposite to each other.

[0016] The lower end of the U-shaped spring and the other end of the fan-shaped connecting piece are both electrically connected to the terminal sub-assembly through the connecting assembly;

[0017] The lifting rod has a protruding abutment in the middle, and the end of the abutment away from the lifting rod abuts against the middle of the upper end of the U-shaped spring piece.

[0018] The lifting rod is used to drive the upper end of the U-shaped spring to swing up and down, and the swinging of the upper end of the U-shaped spring is used to make the moving contact contact or separate from the stationary contact.

[0019] Preferably, the terminal sub-assembly includes a positive terminal and a negative terminal;

[0020] The connecting assembly includes short rivets and long rivets;

[0021] One end of the short rivet passes through the lower end of the U-shaped spring, the lower surface of the base, and the positive terminal in sequence, so that the lower end of the U-shaped spring, the base, and the positive terminal are fixedly connected.

[0022] One end of the long rivet passes through the other end of the fan-shaped connecting piece, the lower surface of the base, and the negative terminal in sequence, so as to fix the fan-shaped connecting piece, the base, and the negative terminal together.

[0023] Preferably, the temperature-sensing power assembly includes an aluminum cover, a bimetallic strip, a stainless steel strip, and a partition that are stacked sequentially.

[0024] A temperature sensing element is installed between the aluminum cover and the bimetallic strip;

[0025] The upper end of the lifting rod is located below the center of the lower surface of the partition;

[0026] The expansion of the temperature sensing bulb causes the bimetallic strip, stainless steel strip, and partition to deform sequentially. The deformation of the partition abuts against the upper end of the lifting rod and drives the lifting rod to descend. The descent of the lifting rod causes the upper end of the U-shaped spring to swing downward. The up-and-down swing of the upper end of the U-shaped spring is used to separate the moving contact from the stationary contact.

[0027] Preferably, the outer surface of the aluminum cover extends outward to form a mounting plate, and the mounting plate has mounting holes for external mounting components to pass through and be installed.

[0028] Preferably, a reset hole is provided at the center of the lower surface of the base, and the reset hole is used for the lifting rod to move through.

[0029] Preferably, the lower surface of the base is provided with radially spaced and equally divided dividing stripes centered on the reset hole. The three adjacent dividing stripes correspond to the dividing space formed by the two dividing parts, and the three adjacent dividing stripes are used to install a set of terminal sub-assemblies.

[0030] Preferably, an identification layer is provided between the dividing stripes.

[0031] Preferably, the cross-sectional shape of the base is circular.

[0032] Preferably, the number of the contact switch sub-assemblies and the number of the terminal sub-assemblies are both three sets.

[0033] One of the above technical solutions has the following beneficial effects:

[0034] 1. Improved safety: The magnetic blowout arc extinguishing function significantly reduces the possibility of continuous arc burning, effectively preventing safety hazards such as short circuits and fires caused by electric arcs, and improving the overall safety performance of the temperature limiter.

[0035] 2. Enhanced reliability: By precisely controlling the response of the temperature-sensing power component and the movement of the lifting rod, the accurate operation of the contact switch component is ensured, thereby improving the reliability and stability of circuit switching.

[0036] 3. Optimized structural layout: The partitioned space formed by the partitions on the inner wall of the base not only rationally arranges the positions of the contact switch sub-assemblies and terminal sub-assemblies, but also facilitates the installation of magnets and the formation of arc-extinguishing magnetic fields, thus optimizing the overall structural layout and improving space utilization.

[0037] 4. High adaptability: The temperature limiter is designed flexibly and can adjust the threshold of the temperature-sensing power component, the stroke of the lifting rod, and the number and layout of the contact switch components as needed to adapt to the needs of different application scenarios. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a DC snap-type temperature limiter with magnetic blowout arc extinguishing function according to this utility model;

[0039] Figure 2 This is a top view schematic diagram of a DC snap-type temperature limiter with magnetic blowout arc extinguishing function according to this utility model;

[0040] Figure 3 This is an explosion diagram of a DC snap-type temperature limiter with magnetic blowout arc extinguishing function according to this utility model;

[0041] Figure 4 This is a top view schematic diagram of a DC snap-type temperature limiter with magnetic blowout arc extinguishing function and a hidden temperature-sensing power component according to the present invention.

[0042] Figure 5 This is a schematic diagram of the installation of the lifting rod, single-group contact switch sub-assembly, and single-group terminal sub-assembly in a DC snap-type temperature limiter with magnetic blowout arc extinguishing function according to the present invention, through the connection assembly.

[0043] In the attached drawings: base 1, reset hole 10, partition 11, mounting groove 110, partition stripe 12, and marking layer 13;

[0044] Temperature-sensitive power assembly 2, aluminum cover 21, bimetallic strip 22, stainless steel strip 23, partition 24;

[0045] Lifting rod 3, contact part 31;

[0046] Contact switch assembly 4, contact switch subassembly 41, U-shaped spring 411, sector-shaped connecting piece 412, moving contact 413, stationary contact 414, terminal subassembly 42, positive terminal 421, negative terminal 422;

[0047] Connecting component 5, short rivet 51, long rivet 52;

[0048] Magnet 6;

[0049] Mounting plate 7, mounting hole 70. Detailed Implementation

[0050] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", 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 element 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.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0053] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0054] like Figure 1-5 As shown, a DC snap-type temperature limiter with magnetic blowout arc extinguishing function includes a base 1;

[0055] The upper opening of the base 1 is covered and fitted with a temperature-sensitive power assembly 2. The driving end of the temperature-sensitive power assembly 2 is fitted with a lifting rod 3, and the bottom end of the lifting rod 3 is fitted with a contact switch assembly 4.

[0056] The contact switch assembly 4 includes multiple sets of contact switch subassemblies 41 and multiple sets of terminal subassemblies 42;

[0057] The inner wall of the base 1 is equally divided into multiple partitions 11. The multiple partitions 11 extend toward the center of the base 1 and are not connected to each other. Adjacent partitions 11 form a partition space. The partition space is used to install the contact switch sub-assembly 41. A corresponding terminal sub-assembly 42 is provided on the lower surface of the base 1 corresponding to the contact switch sub-assembly 41. The terminal sub-assembly 42 and the contact switch sub-assembly 41 are electrically connected one-to-one through the connecting component 5.

[0058] The temperature-sensitive power assembly 2 is used to control the up and down movement of the lifting rod 3, and the up and down movement of the lifting rod 3 is used to control the contact switch assembly 4 to make or break contact.

[0059] The partition 11 is provided with a mounting groove 110, and a magnet 6 is installed in the mounting groove 110.

[0060] Multiple magnets 6 are used to form an arc-extinguishing magnetic field with the same magnetic field direction, so as to extinguish the arc generated by the multiple sets of contact switch subassemblies 41 when they are turned on or off by magnetic blowing.

[0061] Specifically, such as Figure 1-5 As shown, the working principle of this utility model is as follows:

[0062] The temperature-sensing power assembly 2 is attached to the load to be protected. When the temperature of the load rises to a preset threshold, i.e., the boiling point of the liquid inside the temperature-sensing power assembly 2, the liquid begins to boil and expand, causing the temperature-sensing power assembly 2 to deform and generate a driving force. The driving end of the temperature-sensing power assembly 2 uses the driving force generated by the deformation to push the lifting rod 3 up and down within the base 1. The up and down movement of the lifting rod 3 directly acts on the contact switch assembly 4. Specifically, when the lifting rod 3 moves, the contact state between the contact switch subassemblies 41 changes from contact to separation. The contact or separation of the contact switch subassemblies 41 controls the electrical connection state between the corresponding terminal subassemblies 42, thereby realizing the conduction or disconnection of the circuit connected to the terminal subassemblies 42.

[0063] It is known that an electric arc will be generated due to a sudden change in current at the moment the contact switch subassembly 41 separates. At this time, multiple magnets 6 installed in the mounting groove 110 of the separator 11 are energized to form an arc-extinguishing magnetic field with the same magnetic field direction. This arc-extinguishing magnetic field generates a Lorentz force on the electric arc, blowing the arc away from the contact point of the contact switch subassembly 41, thereby accelerating the cooling and extinguishing of the arc and effectively preventing equipment damage or fire risks that may be caused by the continued burning of the arc.

[0064] More importantly, the partition 11 divides the interior of the base 1 into multiple independent partition spaces, each for installing a contact switch sub-assembly 41. This design not only avoids electrical interference between different contact switch sub-assemblies 41, but also improves space utilization, making the overall thermostat structure more compact. Furthermore, the partition 11 provides thermal isolation to a certain extent, reducing heat conduction between different contact switch sub-assemblies 41 and improving the thermostat's thermal response speed and accuracy.

[0065] Furthermore, a terminal sub-assembly 42 is added for each group of contact switch sub-assemblies 41. The terminal sub-assemblies 42 are electrically connected to each group of contact switch sub-assemblies 41 one-to-one through the connecting assembly 5. By adopting a multi-pole connection method, multiple loads can be controlled simultaneously, or multiple household appliances with multiple times the power can be controlled in parallel, increasing the flow rate of the device, reducing the requirements for materials, and reducing manufacturing costs.

[0066] In summary, the beneficial effects of this utility model are as follows:

[0067] 1. Improved safety: The magnetic blowout arc extinguishing function significantly reduces the possibility of continuous arc burning, effectively preventing safety hazards such as short circuits and fires caused by electric arcs, and improving the overall safety performance of the temperature limiter.

[0068] 2. Enhanced reliability: By precisely controlling the response of the temperature-sensing power assembly 2 and the movement of the lifting rod 3, the accurate operation of the contact switch assembly 4 is ensured, thereby improving the reliability and stability of circuit switching.

[0069] 3. Optimize the structural layout: The partition space formed by the partition part 11 on the inner wall of the base 1 not only reasonably arranges the positions of the contact switch sub-assembly 41 and the terminal sub-assembly 42, but also facilitates the installation of the magnet 6 and the formation of the arc extinguishing magnetic field, thus optimizing the overall structural layout and improving the space utilization rate.

[0070] 4. High adaptability: The temperature limiter is designed flexibly and can adjust the threshold of the temperature-sensing power component 2, the stroke of the lifting rod 3, and the number and layout of the contact switch components 4 as needed to adapt to the needs of different application scenarios.

[0071] To further explain, the contact switch subassembly 41 includes a U-shaped spring 411 and a sector-shaped connecting piece 412;

[0072] The U-shaped spring piece 411 is placed horizontally, and a moving contact 413 is provided at the upper end of the U-shaped spring piece 411. A stationary contact 414 is provided at one end of the fan-shaped connecting piece 412. The moving contact 413 is located below the stationary contact 414, and the moving contact 413 and the stationary contact 414 are arranged opposite to each other.

[0073] The lower end of the U-shaped spring piece 411 and the other end of the fan-shaped connecting piece 412 are both electrically connected to the terminal sub-assembly 42 through the connecting assembly 5;

[0074] The lifting rod 3 has a protruding abutment part 31 in the middle, and the end of the abutment part 31 away from the lifting rod 3 abuts against the middle of the upper end of the U-shaped spring piece 411.

[0075] The lifting rod 3 is used to drive the upper end of the U-shaped spring 411 to swing up and down. The swinging of the upper end of the U-shaped spring 411 is used to make the moving contact 413 contact or separate from the stationary contact 414.

[0076] like Figure 3-5 As shown, when the temperature of the load to be protected rises to a preset threshold, i.e., the boiling point of the liquid inside the temperature-sensing power assembly 2, the liquid begins to boil and expand, causing the temperature-sensing power assembly 2 to deform, thereby driving the lifting rod 3 to move up and down within the base 1. Since the lifting rod 3 has a protruding abutment part 31 in the middle, this abutment part 31 will abut or release the upper middle part of the U-shaped spring piece 411 during the up and down movement of the lifting rod 3. Specifically, the U-shaped spring piece 411 is placed horizontally, with a moving contact 413 at its upper end, and a stationary contact 414 opposite to the moving contact 413 at one end of the fan-shaped connecting piece 412. When the abutment part 31 moves downward and abuts the U-shaped spring piece 411, the U-shaped spring piece 411 deforms, causing the moving contact 413 to separate from the stationary contact 414, thereby disconnecting the circuit. Conversely, when the abutment part 31 moves upward and releases the U-shaped spring 411, the U-shaped spring 411 recovers its elasticity, and the moving contact 413 abuts against the stationary contact 414, thus turning on the circuit.

[0077] Furthermore, the lower end of the U-shaped spring 411 and the other end of the sector-shaped connecting piece 412 are both electrically connected to the terminal sub-assembly 42 via the connecting assembly 5. Therefore, when the moving contact 413 and the stationary contact 414 contact or separate, the circuit between the terminal sub-assemblies 42 will correspondingly be connected or disconnected. Thus, the design of the U-shaped spring 411 and the sector-shaped connecting piece 412 gives the contact switch sub-assembly 41 better elasticity and wear resistance during operation, thereby improving the service life of the temperature limiter.

[0078] To further explain, the terminal sub-assembly 42 includes a positive terminal 421 and a negative terminal 422;

[0079] The connecting component 5 includes a short rivet 51 and a long rivet 52;

[0080] One end of the short rivet 51 passes through the lower end of the U-shaped spring 411, the lower surface of the base 1, and the positive terminal 421 in sequence, so that the lower end of the U-shaped spring 411, the base 1, and the positive terminal 421 are fixedly connected.

[0081] One end of the long rivet 52 passes through the other end of the fan-shaped connecting piece 412, the lower surface of the base 1, and the negative terminal 422 in sequence, so that the fan-shaped connecting piece 412, the base 1, and the negative terminal 422 are fixedly connected.

[0082] Specifically, such as Figure 3-5 As shown, the terminal subassembly 42 includes a positive terminal 421 and a negative terminal 422, which are used to connect to the positive and negative terminals of an external circuit, respectively. The connecting assembly 5 includes a short rivet 51 and a long rivet 52, which are used to fix the U-shaped spring piece 411 and the sector-shaped connecting piece 412 to the positive terminal 421 and the negative terminal 422, respectively. Specifically, one end of the short rivet 51 passes through the lower end of the U-shaped spring piece 411, the lower surface of the base 1, and the positive terminal 421 in sequence, fixing them together; one end of the long rivet 52 passes through the other end of the sector-shaped connecting piece 412, the lower surface of the base 1, and the negative terminal 422 in sequence, similarly fixing them together. In this way, when the moving contact 413 and the stationary contact 414 contact or separate, the circuit between the positive terminal 421 and the negative terminal 422 will be connected or disconnected accordingly.

[0083] To further explain, the temperature-sensing power assembly 2 includes an aluminum cover 21, a bimetallic strip 22, a stainless steel strip 23, and a partition 24 that are stacked in sequence.

[0084] A temperature sensing element is installed between the aluminum cover 21 and the bimetallic strip 22;

[0085] The upper end of the lifting rod 3 is located below the center of the lower surface of the partition 24;

[0086] The expansion of the temperature sensing bulb causes the bimetallic strip 22, the stainless steel strip 23, and the partition 24 to deform sequentially. The deformation of the partition 24 abuts against the upper end of the lifting rod 3 and drives the lifting rod 3 to descend. The descent of the lifting rod 3 drives the upper end of the U-shaped spring 411 to swing downward. The up-and-down swing of the upper end of the U-shaped spring 411 is used to separate the moving contact 413 from the stationary contact 414.

[0087] like Figure 3 As shown in the figure, when the temperature sensing bulb between the aluminum cover 21 and the bimetallic strip 22 is not shown in the figure and does not sense the set temperature, it is in a contracted state. The bimetallic strip 22, the stainless steel strip 23 and the partition 24 do not deform. Then the lifting rod 3 is in the initial position, and the moving contact 413 and the stationary contact 414 of the contact switch subassembly 41 abut against each other to realize the conduction of the terminal subassembly 42.

[0088] When the temperature sensing bulb between the aluminum cover 21 and the bimetallic strip 22 senses the set temperature, it will begin to expand. During the expansion process, it will compress the bimetallic strip 22, causing the bimetallic strip 22 to deform and bend in the opposite direction. This will push the stainless steel strip 23 to deform in turn. The stainless steel strip 23 will compress the lifting rod 3 to move downward, thereby controlling the moving contact 413 and the stationary contact 414 of the contact switch subassembly 41 to separate from each other, so as to realize the disconnection of the terminal subassembly 42.

[0089] To further explain, the outer surface of the aluminum cover 21 extends outward to provide a mounting plate 7, and the mounting plate 7 has a mounting hole 70, which is used for external mounting components to pass through and be installed.

[0090] Specifically, such as Figure 1-3 As shown, there are two mounting plates 7, each located on one side of the aluminum cover 21. By adjusting the tightening of the mounting components, such as the self-tapping screws, a tight contact and stable connection between the temperature limiter and the external load can be ensured. This design provides a balanced fixing force, preventing the temperature-sensing power assembly 2 from shaking or shifting during operation.

[0091] To further explain, a reset hole 10 is provided at the center of the lower surface of the base 1, and the reset hole 10 is used for the lifting rod 3 to move through.

[0092] Specifically, such as Figure 2 As shown, a reset hole 10 is specially provided on the lower surface of the base 1. The design of this reset hole 10 is to allow the bottom end of the lifting rod 3 to move freely through it, thereby realizing the up and down movement of the lifting rod 3 inside the base 1. It also makes it convenient for personnel to directly observe whether the temperature limiter has been triggered or to manually reset it.

[0093] To further explain, the lower surface of the base 1 is radially and equally divided with the reset hole 10 as the center, and the three adjacent dividing stripes 12 correspond to the dividing space formed by the two dividing parts 11. The three adjacent dividing stripes 12 are used to install a set of terminal sub-assemblies 42.

[0094] To further explain, an identification layer 13 is provided between the separating stripes 12.

[0095] Specifically, such as Figure 2As shown, the bottom of the base 1 has a special area centered on the reset hole 10. Within this area, the lower surface of the base is radially divided into several equal sections 12, centered on the reset hole 10, serving to divide and position the components. Specifically, every three adjacent dividing stripes 12 correspond to the partition space formed by two partition sections 11, and a marking layer 13 is also provided. This design means that every three dividing stripes 12 provide precise positioning and guidance for the installation and connection of a set of terminal subassemblies 42.

[0096] The above design not only makes the structure of the base 1 more compact and orderly, but also greatly improves the installation efficiency and accuracy of the terminal subassemblies 42. Guided by the dividing strips 12 and the marking layer 13, installers can easily determine the correct position of each terminal subassembly 42, thereby avoiding installation errors and confusion.

[0097] To further explain, the cross-sectional shape of the base 1 is circular.

[0098] To further clarify, the number of the contact switch sub-assemblies 41 and the number of the terminal sub-assemblies 42 are both three sets.

[0099] In one preferred embodiment, such as Figure 4 As shown, the design of the circular cross-section base 1 and the reasonable layout of the three partitions 11 make the structure of the entire temperature limiter more compact and reasonable, improving space utilization and overall aesthetics.

[0100] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A DC snap-action temperature limiter with magnetic blowout arc extinguishing function, characterized in that, Including the base (1); The upper opening of the base (1) is covered and fitted with a temperature-sensitive power assembly (2), the driving end of the temperature-sensitive power assembly (2) is fitted with a lifting rod (3), and the bottom end of the lifting rod (3) is fitted with a contact switch assembly (4). The contact switch assembly (4) includes multiple sets of contact switch subassemblies (41) and multiple sets of terminal subassemblies (42). The inner wall of the base (1) is equally divided into multiple partitions (11). The multiple partitions (11) extend toward the center of the base (1) and are not connected to each other. Adjacent partitions (11) form a partition space. The partition space is used to install the contact switch sub-assembly (41). The lower surface of the base (1) corresponding to the contact switch sub-assembly (41) is provided with a corresponding terminal sub-assembly (42). The terminal sub-assembly (42) and the contact switch sub-assembly (41) are electrically connected one-to-one through the connecting component (5). The temperature-sensitive power assembly (2) is used to control the up and down movement of the lifting rod (3), and the up and down movement of the lifting rod (3) is used to control the contact switch assembly (4) to make or break contact. The partition (11) is provided with a mounting groove (110), and a magnet (6) is installed in the mounting groove (110). Multiple magnets (6) are used to form an arc-extinguishing magnetic field with the same magnetic field direction to extinguish the arc generated by the contact switching subassemblies (41) being turned on or off by magnetic blowing.

2. A DC snap-action temperature limiter with magnetic blowout arc extinguishing function according to claim 1, characterized in that, The contact switch subassembly (41) includes a U-shaped spring (411) and a sector-shaped connecting piece (412). The U-shaped spring (411) is placed horizontally, and the upper end of the U-shaped spring (411) is provided with a moving contact (413). One end of the fan-shaped connecting piece (412) is provided with a stationary contact (414). The moving contact (413) is located below the stationary contact (414), and the moving contact (413) and the stationary contact (414) are arranged opposite to each other. The lower end of the U-shaped spring (411) and the other end of the fan-shaped connecting piece (412) are both electrically connected to the terminal sub-assembly (42) through the connecting assembly (5); The lifting rod (3) has a protruding abutment (31) in the middle, and the end of the abutment (31) away from the lifting rod (3) abuts against the middle of the upper end of the U-shaped spring (411). The lifting rod (3) is used to drive the upper end of the U-shaped spring (411) to swing up and down. The swinging of the upper end of the U-shaped spring (411) is used to make the moving contact (413) contact or separate from the stationary contact (414).

3. A DC snap-type temperature limiter with magnetic blowout arc extinguishing function according to claim 2, characterized in that, The terminal subassembly (42) includes a positive terminal (421) and a negative terminal (422). The connecting component (5) includes a short rivet (51) and a long rivet (52). One end of the short rivet (51) passes through the lower end of the U-shaped spring (411), the lower surface of the base (1), and the positive terminal (421) in sequence, so that the lower end of the U-shaped spring (411), the base (1), and the positive terminal (421) are fixedly connected. One end of the long rivet (52) passes through the other end of the fan-shaped connecting piece (412), the lower surface of the base (1), and the negative terminal (422) in sequence, so that the fan-shaped connecting piece (412), the base (1), and the negative terminal (422) are fixedly connected.

4. A DC snap-type temperature limiter with magnetic blowout arc extinguishing function according to claim 3, characterized in that, The temperature-sensitive power assembly (2) includes an aluminum cover (21), a bimetallic strip (22), a stainless steel strip (23), and a partition (24) that are stacked in sequence. A temperature sensing bulb is installed between the aluminum cover (21) and the bimetallic strip (22); The upper end of the lifting rod (3) is located below the center of the lower surface of the partition (24); The expansion of the temperature sensing bulb is used to cause the bimetallic strip (22), stainless steel strip (23) and partition (24) to deform in sequence. The deformation of the partition (24) is used to abut against the upper end of the lifting rod (3) and drive the lifting rod (3) to descend. The descent of the lifting rod (3) is used to drive the upper end of the U-shaped spring (411) to swing downward. The up-and-down swing of the upper end of the U-shaped spring (411) is used to separate the moving contact (413) from the stationary contact (414).

5. A DC snap-type temperature limiter with magnetic blowout arc extinguishing function according to claim 4, characterized in that, The outer surface of the aluminum cover (21) extends outward and is provided with a mounting plate (7). The mounting plate (7) is provided with mounting holes (70) for external mounting components to pass through and be installed.

6. A DC snap-action temperature limiter with magnetic blowout arc extinguishing function according to claim 1, characterized in that, A reset hole (10) is provided at the center of the lower surface of the base (1), and the reset hole (10) is used for the lifting rod (3) to move through.

7. A DC snap-action temperature limiter with magnetic blowout arc extinguishing function according to claim 6, characterized in that, The lower surface of the base (1) is radially and equally divided with the reset hole (10) as the center. The three adjacent dividing stripes (12) correspond to the dividing space formed by the two dividing parts (11). The three adjacent dividing stripes (12) are used to install a set of terminal sub-assemblies (42).

8. A DC snap-action temperature limiter with magnetic blowout arc extinguishing function according to claim 7, characterized in that, An identification layer (13) is provided between the dividing stripes (12).

9. A DC snap-action temperature limiter with magnetic blowout arc extinguishing function according to claim 1, characterized in that, The base (1) has a circular cross-sectional shape.

10. A DC snap-type temperature limiter with magnetic blowout arc extinguishing function according to claim 9, characterized in that, The number of the contact switch sub-assemblies (41) and the number of the terminal sub-assemblies (42) are both three sets.

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