A dual-channel temperature switch for narrow spaces

Abstract

The present application provides a narrow space dual-channel temperature switch, including a nozzle, a housing, a temperature sensing assembly, and an output component. The temperature sensing assembly includes a mounting seat, a stud, a static reed, a thermal bimetallic strip I, a thermal bimetallic strip II, an elastic gasket, a contact, a mounting plate, and an insulating gasket; the output component includes a wire and a socket. The mounting seat is used to fix the static reed and the stud. The thermal bimetallic strip I and the thermal bimetallic strip II installed on the stud are used to sense the temperature change of the system. When the temperature rises / drops, the thermal bimetallic strip I and the thermal bimetallic strip II are bent and deformed, so that the contacts on both sides of the mounting seat on the static reed are connected and disconnected respectively, and the generated on and off signals are output through the output component. By respectively arranging the thermal bimetallic strip I and the thermal bimetallic strip II on both sides of the static reed mounting seat, and by changing the gap between the two thermal bimetallic strips and the static reed, it is possible to set a dual-channel temperature on / off switch point in a narrow space.

Description

Technical Field

[0001] The present application belongs to the technical field of temperature detection instruments and meters, and specifically relates to a dual-channel temperature switch for a narrow space. Background Art

[0002] A mechanical temperature switch is an electromechanical switch product that uses a thermal bimetallic strip as a temperature sensitive element and converts the displacement signal of the thermal bimetallic strip after it senses temperature into an electrical signal. Temperature switches are widely used in household and engineering electrical equipment, such as air-conditioning motors, transformers, and electric heating appliances. In addition, temperature switches are also used in aircraft environmental control systems to detect temperature alarms of the tested system. When the temperature rises to the switching point temperature or drops to the switching point temperature, the thermal bimetallic strip is heated to bend or recover, opening / closing the contacts and cutting off / connecting the circuit, thereby outputting a circuit conversion signal.

[0003] Compared with the conventional technology, when dual-channel output is required, the size of the temperature switch is larger, the number of pins of the required connector is larger, the processing of parts is more complicated, and the temperature switch point is difficult to achieve in dual-channel output. Summary of the invention

[0004] Purpose of the invention: To solve the problem that the structural design of a dual-channel temperature switch is difficult when the space structure is limited, the present invention achieves the purpose of reducing the size through a structural design of a space sheet metal bending thermal bimetallic strip to meet the requirements of a dual-channel temperature switch in a narrow space.

[0005] The present application provides a narrow space dual-channel temperature switch, the temperature switch comprising:

[0006] Take-over nozzle 1, connected to the system pipeline;

[0007] A housing 2, mounted on the nozzle;

[0008] A mounting seat 3, connected to the internal thread of the nozzle by threading;

[0009] A stud 4, connected to the mounting seat by threads;

[0010] A static spring sheet 5, fixedly connected to the mounting seat;

[0011] Thermo bimetallic strips Ⅰ6 and Ⅱ7 are installed on the studs and tightened by nuts, and the gap between the two thermobimetallic strips is adjusted by an elastic washer 8;

[0012] The contact 9 is fixed on the mounting plate 10 by riveting; the three groups of mounting plates are respectively fixed on the two thermal bimetallic plates and the static spring plate by bending the sheet metal, and an insulating gasket 11 is arranged between the mounting plate and the thermal bimetallic plates and the static spring plate to ensure the insulation performance;

[0013] Among them, the take-over nozzle directly contacts the medium and transfers the medium temperature to the inner cavity of the temperature switch. When the temperature rises / drops, the thermal bimetallic strips I and II bend and deform, so that the contacts on both sides of the mounting plate on the static spring plate are connected and disconnected respectively, and the generated on and off signals are output through the output component.

[0014] Preferably, the filler nozzle 1 has an internal thread 104, an external hexagon 103 and a fuse hole 102; the function of the filler nozzle is to connect the temperature switch to the system pipeline and provide an installation position for the shell and the mounting seat; the function of the internal thread is to provide a mounting position for the mounting seat; the shell is a cylindrical structure, and its function is to provide a mounting position 201 for the socket.

[0015] Preferably, the mounting seat has a wire threading hole 303, an internal threaded hole 304 and a tool mounting position 301; the function of the wire threading hole is to provide a spatial path for connecting the wire to the socket; the function of the internal threaded hole is to provide a mounting position for the stud and to provide a positioning reference and mounting plane for the static spring sheet; the function of the tool mounting position is to provide a tool mounting position for tightening the mounting seat.

[0016] Preferably, the static spring sheet is a bent plate, the function of which is not to deform when the temperature changes.

[0017] Preferably, the stud is a slender threaded rod structure, and its function is to provide a mounting position and mounting reference for the two thermal bimetallic strips and the elastic gasket; the function of the elastic gasket is to adjust the gap through the elastic gasket.

[0018] Preferably, the static spring sheet is made of stainless steel, which is fixed to the mounting seat by laser welding and provides a mounting position for the mounting sheet.

[0019] Preferably, the thermal bimetallic strip is a bent strip made of a thermal bimetallic strip, which has the function of deforming when the temperature changes and providing a mounting position for the mounting sheet.

[0020] Preferably, the mounting plate has a sheet metal structure with mounting holes, the function of which is to provide mounting positions for contacts and welding positions for wires; the contacts are riveted and fixed on the mounting plate.

[0021] This application has the following technical effects:

[0022] The present invention arranges thermal bimetallic strips I and II on both sides of a stationary spring strip mounting seat respectively, and changes the gap between the two thermal bimetallic strips and the stationary spring strip, thereby setting a dual-channel temperature on / off switch point in a narrow space. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a diagram showing the internal structure of a dual-channel temperature switch in a narrow space;

[0024] Figure 2 It is a schematic diagram showing the working principle of the temperature sensing combination of a dual-channel temperature switch in a narrow space;

[0025] Figure 3 This is a diagram showing the nozzle structure of a dual-channel temperature switch in a narrow space;

[0026] Figure 4 It is a shell structure diagram showing a dual-channel temperature switch in a narrow space;

[0027] Figure 5 This is a diagram showing the mounting base structure of a dual-channel temperature switch in a narrow space;

[0028] Figure 6 It is a diagram showing the structure of a thermal bimetal I of a dual-channel temperature switch in a narrow space;

[0029] Figure 7 It is a diagram showing the structure of the thermal bimetal II for a dual-channel temperature switch in a narrow space;

[0030] Figure 8 It is a three-dimensional structural diagram showing a dual-channel temperature switch in a narrow space;

[0031] Among them: 1: take-over nozzle, 2: shell, 3: mounting seat, 4: stud, 5: static spring, 6: thermal bimetallic strip I, 7: thermal bimetallic strip II, 8: elastic gasket, 9: contact, 10: mounting plate, 11: insulating gasket, 12: socket. DETAILED DESCRIPTION

[0032] See also Figure 1-Figure 8 The present application provides a dual-channel temperature switch for a narrow space, and the temperature switch includes a nozzle 1, a housing 2, a temperature sensing assembly, and an output component. The temperature sensing assembly includes a mounting seat 3, a stud 4, a static reed 5, a thermal bimetallic strip I 6, a thermal bimetallic strip II 7, an elastic washer 8, a contact 9, a mounting plate 10, an insulating gasket 11, etc.; the output component includes a wire and a socket 12. The mounting seat is used to fix the static reed and the stud. The thermal bimetallic strip I and the thermal bimetallic strip II installed on the stud are used to sense the temperature change of the system. When the temperature rises / drops, the thermal bimetallic strip I and the thermal bimetallic strip II are bent and deformed, so that the contacts on both sides of the mounting seat on the static reed are connected and disconnected respectively, and the generated on and off signals are output through the output component.

[0033] The present invention arranges thermal bimetallic strips I and II on both sides of a stationary spring strip mounting seat respectively, and changes the gap between the two thermal bimetallic strips and the stationary spring strip, thereby setting a dual-channel temperature on / off switch point in a narrow space.

[0034] Aiming at the structural requirements of a dual-channel temperature switch in a narrow space, the present invention proposes a design concept of a space sheet metal bending thermal bimetallic strip.

[0035] The invention provides a narrow space dual-channel temperature switch, which comprises a static spring assembly, a thermal bimetal assembly, a mounting seat, an elastic gasket, a stud, a shell, a nozzle and a socket, etc.

[0036] The static spring assembly includes a static spring, a contact, a mounting plate, and an insulating gasket, wherein the static spring is fixed to the mounting seat by laser welding, the contact is fixed to the mounting plate by riveting, the mounting plate is fixed to the end of the static spring by bending sheet metal, and the wire is fixed to the mounting plate by soldering.

[0037] The thermal bimetallic strip assembly includes a thermal bimetallic strip, a contact, a mounting plate, and an insulating lining, wherein the thermal bimetallic strip is fixed to the stud by threaded connection, the contact is fixed to the mounting plate by riveting, the mounting plate is fixed to the end of the thermal bimetallic strip by bending the sheet metal, and the wire is fixed to the mounting plate by soldering. The gap between the thermal bimetallic strip assembly and the static spring strip assembly is adjusted by an elastic washer.

[0038] The invention provides a narrow space dual-channel temperature switch structure comprising a nozzle, a shell, a static spring assembly, a thermal bimetallic assembly, a mounting seat, a stud, an elastic washer and a socket. The static spring assembly, the thermal bimetallic assembly, the elastic washer, the stud, the mounting seat, the nut and the wire constitute the temperature sensing assembly of the temperature switch. After the temperature sensing assembly is debugged, it is screwed into the nozzle thread, the shell and the nozzle are fixed by laser welding, and the socket is fixed to the shell by laser welding.

[0039] The present application provides a narrow space dual-channel temperature switch, which includes a nozzle 1, a housing 2, a temperature sensing assembly, and an output component. The temperature sensing assembly includes a mounting seat 3, a stud 4, a static reed 5, a thermal bimetal Ⅰ 6, a thermal bimetal Ⅱ 7, an elastic gasket 8, a contact 9, a mounting plate 10, an insulating gasket 11, etc.; the output component includes a wire and a socket 12. The mounting seat is used to fix the static reed and the stud. The thermal bimetal Ⅰ and the thermal bimetal Ⅱ installed on the stud are used to sense the temperature change of the system. When the temperature rises / drops, the thermal bimetal Ⅰ and the thermal bimetal Ⅱ bend and deform, so that the contacts on both sides of the mounting seat on the static reed are connected and disconnected respectively, and the generated on and off signals are output through the output component.

[0040] The present invention provides a narrow space dual-channel temperature switch, which includes a static spring assembly, a thermal bimetal assembly, a mounting seat, an elastic gasket, a stud, a housing, a nozzle and a socket, etc. The temperature switch has a temperature drop connection point of 95°C and a temperature rise connection point of 130°C.

[0041] The working principle of the temperature switch is that the sensitive element is composed of a thermal bimetallic strip (two materials with different expansion coefficients). When the temperature increases, due to the inconsistency of the expansion coefficients of the two materials, the thermal bimetallic strip will bend and deform toward the side of the low expansion layer, driving the contact at the free end of the thermal bimetallic strip to move, thereby generating a switching signal.

[0042] The static spring sheet assembly includes a static spring sheet 5, a contact 9, a mounting sheet 10, an insulating gasket 11, a wire, etc., wherein the static spring sheet 5 is fixed to the mounting seat by laser welding, the contact 9 is fixed to the mounting sheet 10 by riveting, the mounting sheet 10 is fixed to the end of the static spring sheet 5 by sheet metal bending, and the wire is fixed to the mounting sheet 10 by soldering.

[0043] The thermal bimetallic strip combination I includes a thermal bimetallic strip I 6, a contact 9, a mounting plate 10, an insulating gasket 11, a wire, etc., wherein the thermal bimetallic strip I 6 is fixed to the mounting seat by a threaded connection, the contact 9 is fixed to the mounting plate 10 by riveting, the mounting plate 10 is fixed to the end of the thermal bimetallic strip I 6 by bending sheet metal, and the wire is fixed to the mounting plate 10 by soldering.

[0044] The thermal bimetallic strip assembly II includes a thermal bimetallic strip II7, a contact 9, a mounting plate 10, an insulating gasket 11, a wire, etc., wherein the thermal bimetallic strip II7 is fixed to the mounting seat compression nut by a threaded connection, the contact 9 is fixed to the mounting plate 10 by riveting, the mounting plate 10 is fixed to the end of the thermal bimetallic strip I 6 by bending the sheet metal, and the wire is fixed to the mounting plate 10 by soldering.

[0045] During assembly, the static spring assembly is fixed to the end face of the mounting seat by laser welding, and the stud is screwed into the threaded hole of the mounting seat. The elastic washer is installed on the stud, and the thermal bimetal assembly I is installed on the stud. The thermal bimetal is compressed by the nut, and the temperature of the test equipment is set to 95°C. After placing the temperature switch in this environment for 10 minutes, the preload force of the nut is adjusted so that the switch point outputs a disconnect signal. Subsequently, the elastic washer is installed on the stud, and the thermal bimetal assembly 2 is installed on the stud. The thermal bimetal is compressed by the nut. The temperature of the test equipment is set to 130°C, and the preload force of the nut is adjusted so that the switch point outputs a connection signal.

[0046] During debugging, place the temperature switch in the environment where the temperature switch point is required to be set, and adjust the gap between the contacts by changing the height of the elastic washer through the nut, thereby changing the connection and disconnection temperature of the dual-channel temperature.

Claims

1. A dual-channel temperature switch for narrow spaces, characterized in that: The temperature switch comprises: A take-over nozzle (1) connected to a system pipeline; A housing (2) mounted on the nozzle; A mounting seat (3) is threadedly connected to the internal thread of the nozzle; A stud (4) is connected to the mounting seat via threads; A static spring sheet (5) fixedly connected to the mounting seat; Thermo bimetallic strips I (6) and II (7) are mounted on the stud and tightened by nuts, and the gap between the two thermobimetallic strips is adjusted by an elastic washer (8); The contact (9) is fixed on the mounting plate (10) by riveting; three groups of mounting plates are respectively fixed on the two thermal bimetallic plates and the static spring plate by bending the sheet metal, and insulating gaskets (11) are arranged between the mounting plate and the thermal bimetallic plates and the static spring plate to ensure insulation performance; Among them, the take-over nozzle directly contacts the medium and transfers the medium temperature to the inner cavity of the temperature switch. When the temperature rises / drops, the thermal bimetallic strips I and II bend and deform, so that the contacts on both sides of the mounting plate on the static spring plate are connected and disconnected respectively, and the generated on and off signals are output through the output component.

2. The temperature switch according to claim 1, characterized in that: The filler nozzle (1) has an internal thread (104), an external hexagon (103) and a fuse hole (102); the filler nozzle has the function of connecting the temperature switch to the system pipeline and providing an installation position for the shell and the mounting seat; the internal thread has the function of providing an installation position for the mounting seat; the shell is a cylindrical structure, and its function is to provide an installation position (201) for the socket.

3. The temperature switch according to claim 2, characterized in that: The mounting seat has a threading hole (303), an internal threaded hole (304) and a tool mounting position (301); the threading hole has a function of providing a spatial path for connecting the wire to the socket; the internal threaded hole has a function of providing a mounting position for the stud and providing a positioning reference and mounting plane for the static spring; the tool mounting position has a function of providing a tool mounting position for tightening the mounting seat.

4. The temperature switch according to claim 3, characterized in that: The static spring sheet is a bent plate whose function is to prevent deformation when the temperature changes.

5. The temperature switch according to claim 4, characterized in that: The stud is a slender threaded rod structure, and its function is to provide an installation position and installation reference for the two thermal bimetallic strips and the elastic gasket; the function of the elastic gasket is to adjust the gap through the elastic gasket.

6. The temperature switch according to claim 5, characterized in that: The static spring sheet is made of stainless steel, which is fixed to the mounting seat by laser welding and provides a mounting position for the mounting sheet.

7. The temperature switch according to claim 6, characterized in that: The thermal bimetallic strip is a bent strip made of a thermal bimetallic strip. Its function is to deform when the temperature changes and to provide a mounting position for the mounting sheet.

8. The temperature switch according to claim 7, characterized in that: The mounting plate has a sheet metal structure with mounting holes, and its function is to provide mounting positions for contacts and welding positions for wires; the contacts are fixed on the mounting plate by riveting.

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