Simple and small-sized manual reset liquid expansion type temperature controller

Abstract

The invention relates to a simple and small manual reset liquid expansion type temperature controller which comprises a fixed support, the fixed support is formed by continuously bending metal and forms a U-shaped groove, a diaphragm capsule and a preassembled temperature control module are connected in the U-shaped groove, and a temperature sensing cylinder is connected to the diaphragm capsule through a capillary tube; an on-off switch is arranged in the temperature control module, an anti-reset assembly is arranged at the end, stretching into the U-shaped groove, of the temperature control module, the anti-reset assembly abuts against the position between the on-off switch and the action end of the diaphragm capsule, and the other end of the temperature control module is slidably connected with a manual reset rod abutting against or adjacent to the on-off switch; one end of the manual reset rod extends out of the temperature control module and forms a pressing end; the liquid expansion type temperature controller is simple in structure, easy and convenient to assemble, small in size, wide in application range, reliable in action, more accurate in temperature control, stable and reliable in performance and long in service life, after the diaphragm capsule acts to switch on and switch off the circuit, manual reset can only be achieved through the manual reset rod, and therefore the protection effect is achieved.

Description

Technical Field

[0001] The invention relates to the field of temperature controllers, in particular to a simple and small manual reset liquid expansion type temperature controller. Background Art

[0002] The existing liquid expansion thermostat is mainly used in temperature control occasions such as household appliances, electric heating equipment, and refrigeration industries. The working principle of the existing liquid expansion thermostat is: when the temperature of the controlled object changes, the substance in the temperature sensing tube or temperature sensing cap of the temperature sensing part of the thermostat, which is generally a liquid, will produce a corresponding physical phenomenon of thermal expansion and contraction, and the membrane box connected to the temperature sensing part will expand or contract. The liquid expansion thermostat uses the lever principle to drive the switch on and off to achieve the purpose of constant temperature. It has the performance characteristics of accurate temperature control, stable and reliable, small on-off temperature difference, large temperature control adjustment range, and large overload current. However, the current liquid expansion thermostat is generally large in size and requires a large installation space. Therefore, it is necessary to improve the existing liquid expansion thermostat. Summary of the invention

[0003] The purpose of the present invention is to solve the above existing problems and provide a simple and reasonable small manual reset liquid expansion type temperature controller.

[0004] A simple and small manual reset liquid expansion type temperature controller comprises a fixed bracket, which is formed by continuous bending of metal to form a U-shaped groove, a coaxial membrane box and a pre-installed temperature control module are connected in sequence in the U-shaped groove toward its opening direction, and a temperature sensing tube is connected to the membrane box through a capillary tube; an on-off switch connected in series to a conductor circuit is arranged in the temperature control module, and an anti-reset component is arranged at one end of the temperature control module protruding into the U-shaped groove, and the anti-reset component is abutted between the on-off switch and the action end of the membrane box, and a manual reset rod abutting or adjacent to the on-off switch is slidably connected to the other end of the temperature control module, and one end of the manual reset rod extends out of the temperature control module and forms a pressing end.

[0005] The purpose of the present invention can also be solved by the following technical measures: As a more specific solution, a fine-tuning bolt is threadedly connected to the base of the fixed bracket, the fine-tuning bolt abuts against the fixed end of the membrane box, and an axial through hole is opened at the inner end of the fine-tuning bolt, and a guide rod is extended from the fixed end of the membrane box and inserted into the axial through hole.

[0006] As a further solution, the anti-reset component includes a steel sheet that can be deformed and a movable push rod, the steel sheet and the movable push rod are coaxially arranged, the action end of the membrane box is against or adjacent to the center of the steel sheet, and the movable push rod is slidably connected in the temperature control module and against the steel sheet and the on-off switch.

[0007] As a further solution, the temperature control module also includes a main shell, the mouth of the main shell is covered with a steel sheet support block, the on-off switch is arranged between the steel sheet support block and the main shell, a guide hole is opened on the steel sheet support block, the guide hole and the movable push rod form a linear sliding fit, a sealing cover is riveted on the outside of the steel sheet support block, the steel sheet is encapsulated between the sealing cover and the steel sheet support block, and the sealing cover is provided with an avoidance opening on the steel sheet corresponding to the steel sheet.

[0008] As a further solution, a rod hole is provided at the bottom of the main body shell, and the rod hole and the manual reset rod form a linear sliding fit, and the pressing end of the manual reset rod is fixedly connected to a pressing head.

[0009] As a further solution, the on-off switch includes a moving contact piece and a stationary contact piece arranged in the main body shell, one end of the moving contact piece and the stationary contact piece is provided with contacts that elastically touch each other, the opposite sides of the movable push rod and the manual reset rod are against the moving contact piece, and the other ends of the moving contact piece and the stationary contact piece are connected with rivets, the rivets extend out of the bottom of the main body shell and are respectively connected with connecting plugs.

[0010] As a further solution, the two ends of the fixed bracket are provided with connecting fitting parts, and the opposite side of the temperature control module is provided with a fastening connection part corresponding to the connecting fitting part. The temperature control module is connected to the fixed bracket through the fastening connection part and the connecting fitting part, and one end of the temperature control module is inserted into the U-shaped groove.

[0011] As a further solution, the fastening connection portion includes a connecting ear connected to the cover on the opposite side and a separate fixing bolt, and a through hole is provided on the connecting ear; the connecting mating portion includes a flange bent outward from the side of the fixed bracket, the flange abuts against the connecting ear, and a fastening screw hole is provided corresponding to the through hole, and the fixing bolt is passed through the through hole and the fastening screw hole to realize the assembly connection between the temperature control module and the fixed bracket.

[0012] As a further solution, the two side plates of the fixed bracket are respectively connected to the ends of the base and extend downward, and the two side edges of the base are folded upward through continuous bending to form connecting feet, and the connecting feet are provided with mounting screw holes for assembling the liquid expansion type temperature controller.

[0013] As a further solution, the fixed bracket is made of an integral metal material, and a bendable soft edge is punched outward from one side plate, and at least one section of the capillary is covered with a protective sleeve, and the protective sleeve is clamped on the fixed bracket by a bendable soft edge clamp.

[0014] The beneficial effects of the present invention are as follows: The present invention discloses a simple and small manual reset liquid expansion type thermostat. The liquid expansion type thermostat has the advantages of simple structure, easy assembly, small size, wide application range, reliable operation, more precise temperature control, stable and reliable performance, and long service life. After the membrane box is actuated to cut off the circuit of the on-off switch, it can only be manually reset by a manual reset rod, thereby playing a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the decomposition structure in the present invention.

[0018] Figure 4 It is a schematic diagram of the fixed bracket structure in the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figures 1 to 4 As shown, a simple and small manual reset liquid expansion type temperature controller includes a fixed bracket 1, which is formed by continuous bending of metal to form a U-shaped groove 101, and a coaxial membrane box 2 and a pre-installed temperature control module 3 are connected in sequence in the U-shaped groove 101 toward its opening direction, and a temperature sensing tube 5 is connected to the membrane box 2 through a capillary 4; an on-off switch 31 connected in series to the conductor circuit is provided in the temperature control module 3, and an anti-reset component 32 is provided at one end of the temperature control module 3 that extends into the U-shaped groove 101, and the anti-reset component 32 is abutted between the on-off switch 31 and the action end of the membrane box 2, and the other end of the temperature control module 3 is slidably connected to a manual reset rod 33 abutting or adjacent to the on-off switch 31, and one end of the manual reset rod 33 extends out of the temperature control module 3 and forms a pressing end.

[0021] This liquid expansion type thermostat has a simple structure, easy assembly, small size, wide application range, reliable operation, more accurate temperature control, stable and reliable performance, and long service life. After the membrane box 2 is actuated to cut off the circuit of the on-off switch 31, it can only be manually reset by the manual reset rod 33, thereby playing a protective role.

[0022] A fine-tuning bolt 6 is threadedly connected to the base 14 of the fixed bracket 1, and the fine-tuning bolt 6 abuts against the fixed end of the diaphragm box 2. An axial through hole 601 is provided at the inner end of the fine-tuning bolt 6. A guide rod 21 is extended from the fixed end of the diaphragm box 2 and inserted into the axial through hole 601. A cross groove 602 or a straight groove is provided at the outer end of the fine-tuning bolt 6, which can fine-tune the position of the diaphragm box 2 before leaving the factory, thereby improving the accuracy of the liquid expansion temperature controller.

[0023] The two ends of the fixed bracket 1 are provided with connecting and fitting parts, and the opposite side of the temperature control module 3 is provided with a fastening connection part corresponding to the connecting and fitting part. The temperature control module 3 is connected to the fixed bracket 1 through the fastening connection part and the connecting and fitting part, and one end of the temperature control module 3 is inserted into the U-shaped groove 101; in this embodiment, the temperature control module 3 has a pseudo-jump type temperature controller structure, which can be pre-assembled, and then the fastening connection part and the connecting and fitting part are used to cooperate, so that the temperature control module 3 can be quickly assembled to the fixed bracket 1, which is convenient for disassembly, maintenance and replacement.

[0024] The anti-reset assembly 32 includes a steel sheet 34 that can be deformed and a movable push rod 35. The steel sheet 34 and the movable push rod 35 are coaxially arranged. The action end of the membrane box 2 is against or adjacent to the center of the steel sheet 34. The movable push rod 35 is slidably connected in the temperature control module 3 and is against the steel sheet 34 and the on-off switch 31. The action end of the membrane box 2 is provided with a protrusion 22. After the membrane box 2 senses temperature and causes the protrusion 22 to move and push the steel sheet 34 to bulge inward, the steel sheet 34 pushes the movable push rod 35 to press the on-off switch 31, so that the on-off switch 31 disconnects the working circuit. Moreover, the steel sheet 34 can still maintain its shape after the protrusion 22 is reset, which can prevent the on-off switch 31 from automatically resetting.

[0025] The temperature control module 3 also includes a main body shell 36, the mouth of the main body shell 36 is covered with a steel sheet support block 37, the on-off switch 31 is arranged between the steel sheet support block 37 and the main body shell 36, the steel sheet support block 37 is provided with a guide hole 371, the guide hole 371 and the movable push rod 35 form a linear sliding fit, the steel sheet support block 37 is riveted with a cover 38, the steel sheet 34 is encapsulated between the cover 38 and the steel sheet support block 37, and the cover 38 is provided with an avoidance opening 381 corresponding to the steel sheet 34; The guide hole 371 can ensure that the movable push rod 35 slides in a straight line without displacement or deflection; in addition, the steel sheet 34 is fixed by the steel sheet support block 37, the structure is simple, and the assembly is easy. The avoidance opening 381 can expose the outer surface of the steel sheet 34, making it easier for the protrusion 22 to press against the steel sheet 34.

[0026] A rod hole 361 is provided at the bottom of the main shell 36, and the rod hole 361 forms a linear sliding fit with the manual reset rod 33. The pressing end of the manual reset rod 33 is fixedly connected with a pressing head 331; the pressing head 331 can limit the manual reset rod 33, and the pressing head 331 increases the contact area of ​​the finger, making it more comfortable when pressing.

[0027] The on-off switch 31 includes a moving contact piece 311 and a stationary contact piece 312 arranged in the main shell 36, and one end of the moving contact piece 311 and the stationary contact piece 312 is provided with a contact 313 that elastically touches each other, and the opposite sides of the movable push rod 35 and the manual reset rod 33 are against the moving contact piece 311, and the other ends of the moving contact piece 311 and the stationary contact piece 312 are connected with a rivet 314, which extends out of the bottom of the main shell 36 and is respectively connected with a connecting plug 315; the above structure belongs to the conventional structure of the jump type temperature controller and will not be elaborated here.

[0028] The fastening connection part includes a connecting ear 382 connected to the cover 38 on the opposite side and a separate fixing bolt 7, and a through hole 383 is provided on the connecting ear 382; the connecting matching part includes a flange 11 bent outward from the side of the fixing bracket 1, and the flange 11 is against the connecting ear 382, ​​and a fastening screw hole 12 is provided corresponding to the through hole 383. The through hole 383 and the fastening screw hole 12 are penetrated by the fixing bolt 7 to realize the assembly connection between the temperature control module 3 and the fixing bracket 1; the fixing bolt 7 is used for assembly and fixing, the connection is firm, the installation is simple, and the production efficiency is high.

[0029] The two side plates 13 of the fixing bracket 1 are respectively connected to the ends of the base 14 and extend downwardly. The two side edges of the base 14 are folded upward by continuous bending to form connecting feet 15, and the connecting feet 15 are provided with mounting screw holes 16 for assembling the liquid expansion type thermostat; the two connecting feet 15 and the two side plates 13 are arranged in a cross shape, and the connecting feet 15 are mainly used to assemble the liquid expansion type thermostat to the carrier.

[0030] An adjusting screw hole 17 is provided on the base 14 of the fixing bracket 1, and the fine-tuning bolt 6 is threadedly connected in the adjusting screw hole 17; in addition, the above-mentioned fastening screw hole 12, adjusting screw hole 17 and mounting screw hole 16 are all formed by opening a through hole 102 on the fixing bracket, and then an internal threaded ring 8 is welded on one side of the through hole 102, and the fastening screw hole 12, adjusting screw hole 17 and mounting screw hole 16 are formed by the internal threaded ring 8 and the through hole 102.

[0031] The fixed bracket 1 is made of an integral metal material, and a bendable soft edge 18 is punched outward from one side plate 13. The capillary 4 is at least partially sleeved with a protective sleeve 41, and the protective sleeve 41 is clamped on the fixed bracket 1 through the bendable soft edge 18; it can fix one end of the capillary 4, play a role in leading out and guiding, and can protect the capillary 4.

[0032] In addition, in this embodiment, the spacing between the two side plates 13 of the fixed bracket 1 is just adapted to the width of the temperature control module 3, and the width of the side plate 13 is smaller than the width of the temperature control module 3. The fixed bracket 1 of this structure is small in size, which reduces the occupied space and makes the liquid expansion type temperature controller more compact.

[0033] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A simple and small manual reset liquid expansion type thermostat, characterized by: The invention comprises a fixed bracket, which is formed by continuous bending of metal to form a U-shaped groove, a coaxial membrane box and a pre-installed temperature control module are connected in sequence in the U-shaped groove toward its opening direction, a temperature sensing tube is connected to the membrane box through a capillary tube; an on-off switch connected in series to the conductor circuit is arranged in the temperature control module, an anti-reset component is arranged at one end of the temperature control module extending into the U-shaped groove, the anti-reset component is abutted between the on-off switch and the action end of the membrane box, and a manual reset rod abutting or adjacent to the on-off switch is slidably connected at the other end of the temperature control module, one end of the manual reset rod extends out of the temperature control module and forms a pressing end; the anti-reset component comprises a steel sheet and a movable push rod that can be agitated and deformed, the steel sheet and the movable push rod are coaxially arranged, the action end of the membrane box abuts or is adjacent to the center of the steel sheet, and the movable push rod is slidably connected in the temperature control module and abuts between the steel sheet and the on-off switch.

2. A simple and small manual reset liquid expansion type thermostat according to claim 1, characterized in that: A fine-tuning bolt is threadedly connected to the base of the fixing bracket, the fine-tuning bolt abuts against the fixed end of the membrane box, and an axial through hole is opened at the inner end of the fine-tuning bolt. A guide rod is extended from the fixed end of the membrane box and inserted into the axial through hole.

3. A simple and small manual reset liquid expansion type thermostat according to claim 1, characterized in that: The temperature control module also includes a main shell, the mouth of the main shell is covered with a steel sheet support block, the on-off switch is arranged between the steel sheet support block and the main shell, a guide hole is opened on the steel sheet support block, the guide hole and the movable push rod form a linear sliding fit, a sealing cover is riveted on the outside of the steel sheet support block, the steel sheet is encapsulated between the sealing cover and the steel sheet support block, and the sealing cover corresponds to the steel sheet with an avoidance opening.

4. A simple and small manual reset liquid expansion type thermostat according to claim 3, characterized in that: A rod hole is provided at the bottom of the main body shell, and the rod hole and the manual reset rod form a linear sliding fit, and a pressing head is fixedly connected to the pressing end of the manual reset rod.

5. A simple and small manual reset liquid expansion type thermostat according to claim 3, characterized in that: The on-off switch comprises a moving contact piece and a stationary contact piece arranged in a main body shell, one end of the moving contact piece and the stationary contact piece is provided with contacts elastically touching each other, the opposite sides of the movable push rod and the manual reset rod are against the moving contact piece, and the other ends of the moving contact piece and the stationary contact piece are connected with rivets, which extend out of the bottom of the main body shell and are respectively connected with connecting plugs.

6. A simple and small manual reset liquid expansion type thermostat according to claim 3, characterized in that: The two ends of the fixed bracket are provided with connecting fitting parts, and the opposite side of the temperature control module is provided with a fastening connection part corresponding to the connecting fitting part. The temperature control module is connected to the fixed bracket through the fastening connection part and the connecting fitting part, and one end of the temperature control module is inserted into the U-shaped groove.

7. A simple and small manual reset liquid expansion type thermostat according to claim 6, characterized in that: The fastening connection part includes a connecting ear connected to the cover on the opposite side and a separate fixing bolt, and a through hole is provided on the connecting ear; the connecting matching part includes a flange bent outward from the side of the fixed bracket, the flange abuts against the connecting ear, and a fastening screw hole is provided corresponding to the through hole, and the through hole and the fastening screw hole are penetrated by the fixing bolt to realize the assembly connection between the temperature control module and the fixed bracket.

8. A simple and small manual reset liquid expansion type thermostat according to claim 1, characterized in that: The two side plates of the fixing bracket are respectively connected to the ends of the base and extend downward. The two side edges of the base are folded upward through continuous bending to form connecting feet, and the connecting feet are provided with mounting screw holes for assembling the liquid expansion type temperature controller.

9. A simple and small manual reset liquid expansion type thermostat according to claim 1, characterized in that: The fixing bracket is made of metal material in one piece, and a bendable soft edge is punched outward on one side plate. At least one section of the capillary is covered with a protective sleeve, and the protective sleeve is clamped on the fixing bracket through the bendable soft edge clamp.

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