Quick-response kick type temperature controller

Abstract

The invention provides a quick-response kick type temperature controller, which belongs to the technical field of temperature controllers and comprises a bottom cover, an upper shell is arranged at the top of the bottom cover, the bottom cover is clamped with the upper shell, a protective plate is arranged at the top of the upper shell, a pressing plate is arranged at the top of the protective plate, and a knob is arranged above the pressing plate. A first wiring end and a second wiring end are arranged between the upper shell and the protective plate, thin pipes are arranged on the inner sides of the bottom cover and the upper shell, temperature sensing bags are arranged on the thin pipes, and the heating device further comprises a temperature control assembly which is arranged on the inner side of the upper shell and used for controlling the heating temperature to be within a preset range; and the adjusting assembly is arranged on the upper shell, and the adjusting assembly is used for adjusting the set temperature of the temperature controller. According to the invention, the current-conducting plate is pushed to move laterally through the boss on the vertical push frame, so that the two contacts generate relative sliding friction, surface oxides and ablation residues are automatically removed, and self-cleaning of the contacts is realized; and meanwhile, the electric arc is guided to a non-working area to protect the main contact surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the mechanical field, and in particular, to a quick response type of snap-action temperature controller. BACKGROUND

[0002] The mechanical temperature controller is a control device for automatically turning on and off the circuit by physically sensing the temperature, and its core function is to perform temperature protection and constant temperature control in household appliances and industrial equipment. It can immediately cut off the power supply when overheat is detected to prevent equipment damage or safety accidents; at the same time, it can maintain the temperature within the range set by the user through repeated on-off, and ensure the continuous and stable operation of the equipment. Because of its solid structure, low cost and strong anti-interference ability, it has become an indispensable basic safety control element in many fields.

[0003] The contacts inside the mechanical temperature controller need to be frequently contacted and separated during operation, which is easy to produce electric arc. The high temperature of the electric arc will continuously erode the surface of the contact, causing the metal contact to oxidize and roughen after long-term use, forming a surface layer with high resistance. The oxide layer will hinder the smooth passage of current, increase the contact resistance, and further cause local overheating or even continuous heating. This heating phenomenon not only aggravates the wear of the contact, but also affects the response sensitivity and control accuracy of the temperature controller, eventually leading to performance degradation or failure.

[0004] How to invent a quick response type of snap-action temperature controller to improve these problems has become a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] In order to make up for the above shortcomings, the present application provides a quick response type of snap-action temperature controller, which aims to improve the problems mentioned in the above background.

[0006] The present application is implemented as follows:

[0007] The present application provides a quick response type of snap-action temperature controller, which includes a bottom cover, the top of the bottom cover is provided with an upper shell, the bottom cover and the upper shell are clamped, the top of the upper shell is provided with a protective plate, the top of the protective plate is provided with a pressing plate, the upper side of the pressing plate is provided with a knob, the first and second wiring ends are arranged between the upper shell and the protective plate, the inner side of the bottom cover and the upper shell is provided with a thin tube, the thin tube is provided with a temperature sensing bag, and the temperature controller further comprises: a temperature control assembly, which is arranged on the inner side of the upper shell and is used for controlling the heating temperature within a preset range; and an adjusting assembly, which is arranged on the upper shell and is used for adjusting the set temperature of the temperature controller.

[0008] Preferably, the first and second terminals are respectively provided with first and second bolts, the upper shell is provided with a threaded sleeve, a rotating rod is threadedly connected in the threaded sleeve, the rotating rod is fixedly connected with a knob, and the upper shell is provided with a connecting frame.

[0009] Preferably, the temperature control assembly comprises a moving plate fixedly connected to the bottom of the upper shell, the moving plate is provided with a curved portion, the moving plate is fixedly connected with a sealed capsule, the sealed capsule is fixedly connected with the capillary tube and the temperature sensing bag and is sequentially communicated, the cylindrical side wall of the sealed capsule is a bellows structure, and the sealed capsule is in contact with the bottom end of the rotating rod.

[0010] Preferably, the top of the moving plate is fixedly connected with a moving frame, the first bolt is threadedly connected with an upper support and a lower support, the upper support and the lower support are fixedly connected, the top of the lower support is provided with a lower insulating block, the top of the lower insulating block is fixedly connected with a lower supporting plate, the top of the lower supporting plate is fixedly connected with a conductive block, the top of the conductive block is fixedly connected with a connecting piece, the top of the connecting piece is provided with an insulating seat, the insulating seat is arranged in a "n" shape, the insulating seat is sleeved with a first spring, the top circumferential side wall of the insulating seat is sleeved with a conductive plate and an upper supporting plate, the bottom of the conductive plate is in abutment with the insulating seat, the top of the upper supporting plate is fixedly connected with a connecting shaft, the connecting shaft penetrates through the insulating seat and the conductive block and is fixedly connected with the lower insulating block below, and the upper support is fixedly connected with the upper supporting plate.

[0011] Preferably, the bottom of the conductive plate is fixedly connected with an upper contact, the bottom of the upper contact is provided as a plane, the end of the connecting piece away from the conductive block is fixedly connected with a movable contact piece, the end of the movable contact piece is fixedly connected with a lower contact, the top of the lower contact is provided as a curved surface, the lower supporting plate is threadedly connected with a thimble, the top of the connecting piece close to the insulating seat is fixedly connected with a reed plate, the end of the reed plate away from the connecting insulating seat is movably connected with a spring piece, the reed plate and the spring piece penetrate through the movable contact piece and are located on the inner side of the movable contact piece, the end of the spring piece is fixedly connected with the top of the movable contact piece, the end of the movable contact piece is fixedly connected with the lower contact, the end of the upper supporting plate is fixedly connected with a ceramic column, the ceramic column is fixedly connected with the connecting piece, the end of the ceramic column penetrates through the conductive plate, the ceramic column is located on the inner side of the moving frame, the top of the ceramic column is provided with a certain preset distance from the moving frame, and the top end of the thimble is in abutment with the bottom of the reed plate penetrating through the connecting piece.

[0012] Preferably, the side wall of the conductive plate is fixedly connected with a second spring, the end of the second spring is fixedly connected with a spring cap, and the spring cap is in abutment with the inner side wall of the upper shell.

[0013] Preferably, the top of the moving plate is fixedly connected with a vertical push frame, the side wall of the vertical push frame is fixedly connected with a boss, the bottom of the boss is provided with an inclined surface, and the position of the boss corresponds to the position of the conductive plate.

[0014] Preferably, the adjusting assembly comprises a bent plate arranged in the inner portion of the upper shell, the two sides of the bent plate are bent downward, the middle portion is protruded upward, the protruded positions of the two sides of the bent plate are embedded with the inner side wall of the upper shell, and the inner side wall of the connecting frame is fixedly connected with a plurality of clamping blocks.

[0015] Preferably, the top of the bent plate is provided with a limiting plate, one side of the limiting plate is provided with a limiting flange, and the rotating rod penetrates through the limiting plate and the bent plate.

[0016] Preferably, the connecting frame and the pressing plate are connected through corresponding bolts.

[0017] The beneficial effects of the present application are as follows: the jump type temperature controller senses temperature changes through the temperature sensing bag and the sealing capsule, drives the moving plate and the moving frame thereon to move up and down, pushes the ceramic column to press downward, triggers the over-center elastic mechanism composed of the moving contact and the spring sheet to jump, and realizes the rapid on-off of the upper contact and the lower contact. In the action process, the boss on the vertical push frame pushes the conductive plate to move laterally, causes the two contacts to slide relative to each other, automatically removes the surface oxides and ablation residues, and realizes self-cleaning of the contacts; at the same time, the electric arc is guided to the non-working area, and the main contact surface is protected. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 is a three-dimensional structure schematic diagram of a fast-response jump type temperature controller provided by the embodiments of the present application;

[0020] Figure 2 is a top cover structure schematic diagram of a fast-response jump type temperature controller provided by the embodiments of the present application;

[0021] Figure 3 is a moving plate position schematic diagram of a fast-response jump type temperature controller provided by the embodiments of the present application;

[0022] Figure 4 is a moving plate structure schematic diagram of a fast-response jump type temperature controller provided by the embodiments of the present application;

[0023] Figure 5 is a schematic diagram of a mobile frame structure of a quick-response bump-type temperature controller according to an embodiment of the present application;

[0024] Figure 6 is a schematic diagram of a spring sheet position structure of a quick-response bump-type temperature controller according to an embodiment of the present application;

[0025] Figure 7 is a schematic diagram of a vertical push frame structure of a quick-response bump-type temperature controller according to an embodiment of the present application;

[0026] Figure 8 is a schematic diagram of a contact separation of a quick-response bump-type temperature controller according to an embodiment of the present application;

[0027] Figure 9 is a schematic diagram of a conductive structure of a quick-response bump-type temperature controller according to an embodiment of the present application;

[0028] Figure 10 is a schematic diagram of a bent plate structure of a quick-response bump-type temperature controller according to an embodiment of the present application;

[0029] Figure 11 is a schematic diagram of a limit plate structure of a quick-response bump-type temperature controller according to an embodiment of the present application;

[0030] Figure 12 is a schematic diagram of a connecting frame structure of a quick-response bump-type temperature controller according to an embodiment of the present application.

[0031] In the figure: 1, bottom cover; 2, upper shell; 3, guard plate; 4, pressing plate; 5, knob; 8, first wiring end; 9, second wiring end; 11, thin tube; 12, temperature sensing bag; 17, first bolt; 18, second bolt; 19, rotating rod; 20, threaded sleeve; 22, connecting frame; 25, moving plate; 26, bent portion; 27, sealing capsule; 28, mobile frame; 31, upper support; 32, lower support; 33, lower insulating block; 34, lower support plate; 35, conductive block; 36, connecting sheet; 37, insulating seat; 38, first spring; 39, movable contact sheet; 40, conductive plate; 41, upper support plate; 42, connecting shaft; 43, upper contact; 44, lower contact; 45, thimble; 46, spring sheet plate; 47, spring sheet; 48, ceramic column; 51, second spring; 52, spring cap; 53, vertical push frame; 54, boss; 61, bent plate; 62, clamping table; 63, limit plate. DETAILED DESCRIPTION

[0032] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] Embodiment, with reference to Figures 1-3 A quick-response snap-action temperature controller comprises a bottom cover 1, an upper shell 2 arranged on the top of the bottom cover 1, a clamping connection between the bottom cover 1 and the upper shell 2, a protective plate 3 arranged on the top of the upper shell 2, a pressing plate 4 arranged on the top of the protective plate 3, a knob 5 arranged above the pressing plate 4, a first wiring terminal 8 and a second wiring terminal 9 arranged between the upper shell 2 and the protective plate 3, a thin tube 11 arranged on the inner side of the bottom cover 1 and the upper shell 2, and a temperature sensing bag 12 arranged on the thin tube 11. The temperature controller further comprises a temperature control assembly arranged on the inner side of the upper shell 2, which is used to control the heating temperature within a preset range; and an adjusting assembly arranged on the upper shell 2, which is used to adjust the set temperature of the temperature controller. The pressing plate 4 and the upper shell 2 are connected through corresponding bolts, the pressing plate 4 is tightly pressed against the protective plate 3 through the bolts connected thereto, and the protective plate 3 exerts pressure on the two wiring terminals to fix the positions of the two wiring terminals.

[0034] The first wiring terminal 8 and the second wiring terminal 9 are respectively provided with a first bolt 17 and a second bolt 18, the upper shell 2 is provided with a threaded sleeve 20, the threaded sleeve 20 is connected with a rotating rod 19 through thread cooperation, the rotating rod 19 is fixedly connected with the knob 5, the upper shell 2 is provided with a connecting frame 22, the top of the first bolt 17 and the second bolt 18 is located on the outer side of the upper shell 2, the threaded sleeve 20 is tightly fitted on the upper shell 2 by the pressing plate 4, which is used to fix the position of the threaded sleeve 20, and rotating the knob 5 drives the rotating rod 19 to rotate on the threaded sleeve 20, and the rotating rod 19 moves up and down through thread cooperation.

[0035] Embodiment, with reference to Figures 4-6, the temperature control component includes a moving plate 25 fixedly connected to the bottom of the upper shell 2. A bending portion 26 is provided on the moving plate 25. A sealing bladder 27 is fixedly connected to the moving plate 25. The sealing bladder 27 is fixedly connected to the thin tube 11 and the temperature sensing bulb 12 and is internally connected in sequence. The cylindrical side wall of the sealing bladder 27 is a bellows structure. The sealing bladder 27 is in contact with the bottom end of the rotating rod 19. One end of the moving plate 25 is fixed to the upper shell 2. By pushing the moving plate 25, the moving plate 25 bends at the position of the bending portion 26. The inside of the sealing bladder 27 is filled with pressurized nitrogen. When the temperature sensing bulb 12 is heated, the nitrogen inside expands, causing the sealing bladder 27 with a bellows structure to axially elongate. The elongated length is approximately linearly proportional to the temperature received within the working temperature range. The operation of this thermostat is controlled by the elongation caused by the change in the heated temperature.

[0036] A moving bracket 28 is fixedly connected to the top of the moving plate 25. The first bolt 17 is threadedly配合 connected to the upper bracket 31 and the lower bracket 32. The upper bracket 31 and the lower bracket 32 are fixedly connected. A lower insulating block 33 is provided on the top of the lower bracket 32. A lower support plate 34 is fixedly connected to the top of the lower insulating block 33. A conductive block 35 is fixedly connected to the top of the lower support plate 34. A connecting piece 36 is fixedly connected to the top of the conductive block 35. An insulating seat 37 is provided on the top of the connecting piece 36. The insulating seat 37 is arranged in an "丄" shape. A first spring 38 is sleeved on the insulating seat 37. A conductive plate 40 and an upper support plate 41 are sleeved on the circumferential side wall of the top of the insulating seat 37. The bottom of the conductive plate 4 is in contact with the insulating seat 37. The top of the upper support plate 41 is fixedly connected to a connecting shaft 42. The connecting shaft 42 passes through the insulating seat 37 and the conductive block 35 and is fixedly connected to the lower insulating block 33 below. The upper bracket 31 is fixedly connected to the upper support plate 41.

[0037] By rotating the first bolt 17, the upper bracket 31 and the lower bracket 32 move axially on the thread of the first bolt 17. The top of the upper bracket 31 contacts the inner side wall of the top of the upper shell 2 for fixing on the upper shell 2. The fixed upper bracket 31 fixes the positions of all components on the connecting shaft 42. The lower bracket 32 abuts against the lower insulating block 33 to stabilize the components on the connecting shaft 42. The conductive plate 40 rotates on the insulating seat 37. The first spring 38 applies an upward thrust to the conductive plate 40, causing the conductive plate 40 to contact the upper support plate 41. Even if there is relative friction between the two, a stable contact surface can be maintained.

[0038] Refer to Figures 5-7The bottom of the conductive plate 40 is fixedly connected with an upper contact 43, the bottom of the upper contact 43 is provided as a plane, the end of the connecting piece 36 away from the conductive block 35 is fixedly connected with a movable contact piece 39, the end of the movable contact piece 39 is fixedly connected with a lower contact 44, the top of the lower contact 44 is provided as a curved surface, the lower supporting plate 34 is threadedly connected with a thimble 45, the top of the connecting piece 36 close to the insulating seat 37 is fixedly connected with a spring leaf plate 46, the end of the spring leaf plate 46 away from the connecting insulating seat 37 is movably connected with a spring leaf 47, the spring leaf plate 46 and the spring leaf 47 penetrate the movable contact piece 39 and are located on the inner side of the movable contact piece 39, the end of the spring leaf 47 is fixedly connected with the top of the movable contact piece 39, the end of the movable contact piece 39 is fixedly connected with the lower contact 44, the end of the upper supporting plate 41 is fixedly connected with a ceramic column 48, the ceramic column 48 is fixedly connected with the connecting piece 36, the ceramic column 48 penetrates the end of the conductive plate 40, the ceramic column 48 is located on the inner side of the moving frame 28, the top of the ceramic column 48 is provided with a certain preset distance from the moving frame 28, and the top end of the thimble 45 penetrates the connecting piece 36 and abuts against the bottom of the spring leaf plate 46.

[0039] It should be noted that the movable contact piece 39 has a preset mechanical stress, is made of a high-elastic metal material (for example, beryllium bronze or stainless steel), and is formed into a long strip-shaped "O" structure (the middle part is hollow, and both sides are symmetrically provided as cantilever beam type supports) through a stamping forming process. In the free state of the structure, the movable contact piece 39 itself has an inward bending stress or a tendency of torsional deformation, so that the movable contact piece 39 is bent upward at both ends in the absence of external force. Since the movable contact piece 39 is fixed at the end of the connecting piece 36, the end of the movable contact piece 39 and the connecting piece 36 after installation is provided to be slightly higher than the end of the movable contact piece 39 and the lower contact 44, and this installation mode further increases the elastic stress inside the movable contact piece 39, thereby providing a stronger and continuous upward contact pressure for the lower contact 44, and ensuring that the lower contact 44 is tightly closed with the upper contact 43. The spring leaf 47 is provided in an arc shape and has a restoring force of a plane, one end of the spring leaf 47 is fixedly connected with the movable contact piece 39, and the other end of the spring leaf 47 is movably connected with the spring leaf plate 46, the bending restoring force of the spring leaf 47 and the preset stress of the movable contact piece 39 jointly act, and form an elastic system with over-center characteristics. The system provides stable contact pressure for the movable contact piece 39 and to a certain extent overcomes the influence of the microscopic unevenness of the contact surface and the oxide film.

[0040] By pushing down the top of the ceramic post 48, the upper support plate 41 and the connecting plate 36 are elastically deformed, which forces the linkage mechanism consisting of the spring plate 46, the spring piece 47 and the movable contact 39 to start storing energy. The core mechanism lies in that, as the top end of the thimble 45 always presses against the spring plate 46, the downward movement of the spring plate 46 is limited, so that the spring plate 46 becomes a relatively fixed reference point. When the connecting plate 36 is pressed down, the fixed end of the movable contact 39 is lowered, while the connecting point of the spring piece 47 with the spring plate 46 remains relatively static due to the limitation of the thimble 45. This causes the spring piece 47 to be forced to bend and twist, and the connecting point (fixed end) of the spring piece 47 with the movable contact 39 generates a tendency of upward movement relative to the movable contact 39 itself. This relative upward movement forces the rigidly connected spring piece 47 to bend and twist (rather than simply compress or stretch), and its own geometry (such as the circular curvature) changes. This complex deformation causes the accumulated elastic restoring force in the spring piece 47 and its direction of action to change continuously. Before reaching the critical point, the combined force direction of the restoring force and the resulting torque can still maintain the state of upward bending of the movable contact 39 and the closure of the contact.

[0041] When the downward movement of the ceramic post 48 reaches the critical point of its mechanical movement, the degree of deformation of the spring piece 47 causes a fundamental mutation in the direction of the combined force of its restoring force: from a direction mainly generating upward component force (maintaining contact closure) to a direction mainly generating downward component force (driving contact opening). This instantaneously reversed downward component force is instantaneously consistent with the direction of internal stress of the movable contact 39 itself, and the two together provide a huge downward acceleration to the movable contact 39, driving it to quickly complete the downward bending action, thereby achieving the rapid and clean separation of the lower contact 44 and the upper contact 43.

[0042] At room temperature, the current flows through the first connecting terminal 8 - the first bolt 17 - the upper support 31 - the conductive plate 40 - the upper contact 43 - the lower contact 44 - the movable contact 39 - the connecting plate 36 - the conductive block 35 - the lower support 34 - the second bolt 18, and then flows out from the second connecting terminal 9. The contact separation of the upper contact 43 and the lower contact 44 is used to control the on-off of the circuit.

[0043] Referring to Figures 5-9The side wall of the conductive plate 40 is fixedly connected with a second spring 51, the end of the second spring 51 is fixedly connected with a spring cap 52, the spring cap 52 abuts against the inner side wall of the upper shell 2, the top of the moving plate 25 is fixedly connected with a vertical push frame 53, the side wall of the vertical push frame 53 is fixedly connected with a boss 54, the bottom of the boss 54 is provided with an inclined surface, the position of the boss 54 corresponds to the position of the conductive plate 40, when the unfixed end of the moving plate 25 moves downward, the vertical push frame 53 moves downward, the inclined surface of the boss 54 on the vertical push frame 53 extrudes the side wall of the conductive plate 40, so that the conductive plate 40 moves along the inclined surface of the boss 54, when the conductive plate 40 moves to the position with the same protruding length as the boss 54, the conductive plate 40 no longer moves, at this time, the second spring 51 is compressed and stored due to the pushing force of the conductive plate 40 and the blockage of the upper shell 2, when the boss 54 moves upward with the vertical push frame 53, the boss 54 releases the extrusion force on the conductive plate 40, and the conductive plate 40 resets under the reset of the second spring 51.

[0044] In the above process, since the lower contact 44 and the upper contact 43 are in a point contact state, when the boss 54 pushes the conductive plate 40 to move, the contact position of the upper contact 43 relative to the lower contact 44 changes, at this time, the downward movement of the ceramic column 48 has not reached the critical point of triggering the contact separation. The contact position of the top arc surface of the lower contact 44 does not change, and the bottom plane contact position of the upper contact 43 changes, and the moving track of the contact position is linear. Since the lower contact 44 and the upper contact 43 are in close contact, when they slide relative to each other, they rub against each other. The friction helps to remove the metal oxide and micro-melting protrusions generated on the surface of the contact due to arc ablation (these defects are caused by the dramatic increase in current density of the tip contact point and the instantaneous high temperature when the contact is separated). Since the mechanical strength of the oxide layer and the micro-melting is much lower than that of the dense metal material of the contact body, the force will preferentially remove these surface defects during the friction process, thereby exposing the fresh and flat metal substrate, effectively inhibiting the increase of the contact resistance. The relative movement in each on-off cycle realizes self-cleaning of the contact surface.

[0045] The strength of the arc induced in the contact separation process is significantly greater than that in the contact connection stage. The contact action occurs instantaneously, and the distance between the contacts decreases sharply to zero. The medium breakdown that may be induced during this time can only release a limited amount of energy, and immediately stops with the establishment of the contact. On the contrary, the separation process is accompanied by the continuous increase of the gap between the contacts, forming a dynamically changing field strength distribution. In this process, the surface melting oxidation and ablation of the tip contact point occur due to the dramatic increase in current density, which is the fundamental reason for the formation of the oxide layer and the micro-unevenness. When one end of the moving plate 25 moves downward, the ceramic column 48 is pushed downward by the moving frame 28, and the boss 54 on the vertical push frame 53 pushes the conductive plate 40 to move, changing the contact position of the two contacts. When the moving plate 25 continues to move downward, the two contacts are disconnected.

[0046] Due to the principle of electric field concentration, the electric arc will always break down the air and form a conductive channel on the path with the shortest distance between the electrodes and the smallest resistance. By forcibly changing the contact separation position, a new and preset "shortest distance" point is actively created, which makes the arc root area of the electric arc deviate from the original main contact surface. This leads the electric arc to the non-working area of the upper contact 43, effectively avoiding the direct ablation of the high-temperature electric arc on the precision fitting contact area of the upper contact 43. When the temperature fluctuation decreases and the two contacts return to the contact state, the point of contact between the two contacts is not the point where the two contacts are disconnected, thereby ensuring the geometric flatness and material composition of the contact point between the two contacts, maintaining the stability of the contact resistance and the long-term electrical life of the contact.

[0047] With reference to Figures 10-12 , the adjusting assembly includes a bent plate 61 arranged inside the upper shell 2, both sides of the bent plate 61 are bent downward, the middle part is protruding upward, the protruding positions of both sides of the bent plate 61 are embedded with the inner side wall of the upper shell 2, the inner side wall of the connecting frame 22 is fixedly connected with a plurality of clamping tables 62, the clamping tables 62 limit the protruding positions of both sides of the bent plate 61, the bent plate 61 is embedded in the upper shell 2 to prevent the bent plate 61 from rotating in the upper shell 2; the clamping tables 62 limit the position of the bent plate 61 on the connecting frame 22, for fixing the bent plate 61, the top of the bent plate 61 is provided with a limiting plate 63, one side of the limiting plate 63 is provided with a limiting convex edge, the rotating rod 19 penetrates through the limiting plate 63 and the bent plate 61, and the connecting frame 22 and the pressing plate 4 are connected through corresponding bolts.

[0048] The limiting convex edge on the limiting plate 63 interferes with the protruding position of the inner side of the upper shell 2, the limiting plate 63 rotates with the rotating rod 19, and the protruding position of the inner side of the upper shell 2 limits the circumferential rotation of the limiting plate 63, for limiting the rotation position of the knob 5 when adjusting the temperature. The top of the bent plate 61 is in contact with the bottom of the limiting plate 63, when the clamping tables 62 limit the bent plate 61 on the connecting frame 22, the bent plate 61 presses the limiting plate 63, increasing the friction between the bent plate 61 and the limiting plate 63, providing friction resistance to prevent the knob 5 from rotating arbitrarily.

[0049] It should be noted that when the device (such as an electric oven) provided with the temperature controller starts to work, the temperature sensing bag 12, which is arranged near the heat source, senses the temperature. When it senses the temperature rising, the nitrogen gas in the bag expands due to the heat, causing the sealed capsule 27 connected thereto to axially extend. The extended sealed capsule 27 presses the bottom of the rotating rod 19 upward, thereby exerting a downward force on the moving plate 25, so that the moving plate 25 elastically bends at the preset bending portion 26, causing the free end of the moving plate 25 to move downward. In the process of the moving plate 25 moving downward, the moving frame 28 fixed thereon also moves downward. When the temperature of the device reaches the set value, the top of the moving frame 28 presses the ceramic column 48, and through the cooperation of various components, the upper contact 43 on the conductive plate 40 is finally separated from the lower contact 44 on the movable contact 39, thereby cutting off the circuit. When the temperature inside the electric oven fluctuates and drops, the nitrogen gas in the sealed capsule 27 contracts, its length shortens, and the pressure on the rotating rod 19 and the moving plate 25 decreases. The moving plate 25 resets under its own elasticity, and the pushing distance of the moving frame 28 to the ceramic column 48 shortens. The movable contact 39 resets rapidly under the action of its own preset stress and the spring sheet 47, so that the lower contact 44 and the upper contact 43 re-close, the circuit is connected, and the heating resumes. Such a cycle can control the temperature within a preset error range, achieving the function of stable temperature limiting.

[0050] The temperature adjusting function is realized by rotating the knob 5. The rotating knob 5 drives the rotating rod 19 fixed thereto to rotate. Since the rotating rod 19 is in threaded connection with the threaded sleeve 20, the rotating motion is converted into linear motion, causing the rotating rod 19 to move downward. The bottom of the downward moving rotating rod 19 presses the sealed capsule 27, thereby exerting an initial bending force on the moving plate 25, causing the free end of the moving plate 25 to drive the moving frame 28 to a relatively lower position. In this way, the initial gap between the top of the moving frame 28 and the ceramic column 48 becomes smaller. Therefore, during the heating process, the sealed capsule 27 does not need to extend to the original length, but only needs a smaller expansion amount corresponding to a lower temperature to cause the moving frame 28 to press down to a position sufficient to trigger the ceramic column 48 to act, thereby causing the contacts to separate and cut off the circuit. Since the temperature required for triggering the action is reduced, the set constant temperature is lower than before adjustment, thereby realizing the function of adjusting the temperature downward. Conversely, rotating the knob 5 in the opposite direction causes the rotating rod 19 to rise, thereby reducing the initial pressure on the sealed capsule 27, and a higher temperature (more extension of the sealed capsule 27) is required to trigger the action, thereby realizing the function of adjusting the temperature upward.

[0051] It should be noted that the specific model and specifications of the motor need to be selected and determined according to the actual specifications of the device, and the specific selection and calculation method adopts the existing technology in the art, which will not be described in detail.

[0052] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A quick-responding snap-action temperature controller, comprising a bottom cover (1), a top portion of the bottom cover (1) is provided with an upper shell (2), the bottom cover (1) and the upper shell (2) are clamped, a top portion of the upper shell (2) is provided with a protective plate (3), a top portion of the protective plate (3) is provided with a pressing plate (4), an upper portion of the pressing plate (4) is provided with a knob (5), a first wiring end (8) and a second wiring end (9) are arranged between the upper shell (2) and the protective plate (3), an inner side of the bottom cover (1) and the upper shell (2) is provided with a thin tube (11), the thin tube (11) is provided with a temperature sensing bag (12), characterized in that, It further includes: A temperature control component, which is arranged inside the upper shell (2), and is used to control the heating temperature within a preset range; An adjustment component, which is arranged on the upper shell (2), and is used to adjust the set temperature of the thermostat.

2. A snap-action temperature control according to claim 1, wherein A first bolt (17) and a second bolt (18) are respectively arranged on the first terminal (8) and the second terminal (9). A threaded sleeve (20) is arranged on the upper shell (2). A rotating rod (19) is connected to the threaded sleeve (20) through thread fit. The rotating rod (19) is fixedly connected to the knob (5). A connecting frame (22) is arranged inside the upper shell (2).

3. A snap-action temperature control according to claim 2, wherein the resilient member is a spring. The temperature control component includes a moving plate (25) fixedly connected to the bottom of the upper shell (2). A bending part (26) is arranged on the moving plate (25). A sealing capsule (27) is fixedly connected to the moving plate (25). The sealing capsule (27) is fixedly connected to the capillary tube (11) and the temperature sensing bulb (12) and is internally connected in sequence. The cylindrical side wall of the sealing capsule (27) is of a bellows structure. The sealing capsule (27) is in contact with the bottom end of the rotating rod (19).

4. A snap-action temperature control according to claim 3, wherein the resilient member is a spring. A moving frame (28) is fixedly connected to the top of the moving plate (25). The first bolt (17) is connected to an upper support (31) and a lower support (32) through thread fit. The upper support (31) and the lower support (32) are fixedly connected. A lower insulating block (33) is arranged on the top of the lower support (32). A lower support plate (34) is fixedly connected to the top of the lower insulating block (33). A conductive block (35) is fixedly connected to the top of the lower support plate (34). A connecting piece (36) is fixedly connected to the top of the conductive block (35). An insulating seat (37) is arranged on the top of the connecting piece (36). The insulating seat (37) is in an "丄" shape. A first spring (38) is sleeved on the insulating seat (37). A conductive plate (40) and an upper support plate (41) are sleeved on the circumferential side wall of the top of the insulating seat (37). The bottom of the conductive plate (40) abuts against the insulating seat (37). A connecting shaft (42) is fixedly connected to the top of the upper support plate (41). The connecting shaft (42) penetrates through the insulating seat (37) and the conductive block (35) and is fixedly connected to the lower insulating block (33) below. The upper support (31) is fixedly connected to the upper support plate (41).

5. A snap-action temperature control according to claim 4, wherein the resilient member is a spring. The bottom of the conductive plate (40) is fixedly connected with an upper contact (43), the bottom of the upper contact (43) is provided as a plane, the end of the connecting piece (36) away from the conductive block (35) is fixedly connected with a movable contact piece (39), the end of the movable contact piece (39) is fixedly connected with a lower contact (44), the top of the lower contact (44) is provided as a curved surface, the lower supporting plate (34) is threadedly connected with a thimble (45), the top of the connecting piece (36) is fixedly connected with a reed plate (46) close to the insulating base (37), the end of the reed plate (46) away from the connecting insulating base (37) is movably connected with a spring piece (47), the reed plate (46) and the spring piece (47) penetrate the movable contact piece (39) and are located on the inner side of the movable contact piece (39), the end of the spring piece (47) is fixedly connected with the top of the movable contact piece (39), the end of the movable contact piece (39) is fixedly connected with the lower contact (44), the end of the upper supporting plate (41) is fixedly connected with a ceramic column (48), the ceramic column (48) is fixedly connected with the connecting piece (36), the ceramic column (48) penetrates the end of the conductive plate (40), the ceramic column (48) is located on the inner side of the moving frame (28), the top of the ceramic column (48) is provided with a certain preset distance from the moving frame (28), the top end of the thimble (45) penetrates the connecting piece (36) and abuts against the bottom of the reed plate (46).

6. A snap-action temperature control according to claim 4, wherein the resilient member is a spring. The side wall of the conductive plate (40) is fixedly connected with a second spring (51), the end of the second spring (51) is fixedly connected with a spring cap (52), and the spring cap (52) abuts against the inner side wall of the upper shell (2).

7. A snap-action temperature control according to claim 5, wherein the resilient member is a spring. The top of the moving plate (25) is fixedly connected with a vertical pushing frame (53), the side wall of the vertical pushing frame (53) is fixedly connected with a boss (54), the bottom of the boss (54) is provided as an inclined surface, and the position of the boss (54) corresponds to the position of the conductive plate (40).

8. A snap-action temperature control according to claim 2, wherein, The adjusting assembly comprises a bent plate (61) arranged inside the upper shell (2), the two sides of the bent plate (61) are bent downward, the middle part is protruding upward, the protruding positions of the two sides of the bent plate (61) are embedded with the inner side walls of the upper shell (2), and the inner side wall of the connecting frame (22) is fixedly connected with a plurality of clamping grooves (62).

9. A snap-action temperature control according to claim 8, wherein the resilient member is a spring. The top of the bent plate (61) is provided with a limiting plate (63), one side of the limiting plate (63) is provided with a limiting convex edge, and the rotating rod (19) penetrates the limiting plate (63) and the bent plate (61).

10. A snap-action temperature control according to claim 9, wherein the resilient member is a spring. The connecting frame (22) and the pressing plate (4) are connected through corresponding bolts.

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