Simple and small automatic reset liquid expansion type temperature controller

Abstract

The invention relates to a simple and small automatic reset liquid expansion type temperature controller which comprises a fixed support, a temperature adjusting rod, a diaphragm capsule and a temperature control module, the temperature adjusting rod, the diaphragm capsule and the temperature control module are coaxially arranged on the fixed support, a main body of the fixed support is of a U-shaped frame structure and forms an inner groove, and connecting matching parts are arranged at the two ends of the fixed support. A fastening connecting part corresponding to the connecting matching part is arranged on the opposite side of the temperature control module, the temperature control module is connected to one end of the fixing support in a matched mode through the fastening connecting part and the connecting matching part, the pressed end of the temperature control module stretches into the inner groove, the temperature adjusting rod is connected to a base of the fixing support in a threaded mode, and the inner end of the temperature adjusting rod is matched with one end of the diaphragm capsule in a pushing mode. The other end of the diaphragm capsule abuts against or is adjacent to the pressed end of the temperature control module, and the diaphragm capsule is connected with a temperature sensing cylinder through a capillary tube. 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.

Description

Technical Field

[0001] The present invention relates to the field of thermostats, and specifically to a simple and small automatic reset liquid expansion type thermostat. Background Art

[0002] Existing liquid expansion type thermostats are mainly used in temperature control applications such as the home appliance industry, electric heating equipment, and refrigeration industry. The working principle of existing liquid expansion type thermostats is as follows: when the temperature of the controlled object changes, the substance (usually a liquid) in the temperature sensing part (such as the temperature sensing cylinder or temperature sensing cap) of the thermostat undergoes corresponding thermal expansion and contraction physical phenomena (volume change), and the bellows connected to the temperature sensing part expands or contracts. Based on the lever principle, it drives the on-off action of the switch to achieve the purpose of constant temperature. The liquid expansion type thermostat has the performance characteristics of accurate temperature control, stable and reliable operation, small on-off temperature difference, large temperature control adjustment range, and large overload current. However, the current liquid expansion type thermostats generally have a large volume and require a large installation space. Therefore, it is necessary to improve the existing liquid expansion type thermostats. Summary of the Invention

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

[0004] A simple and small automatic reset liquid expansion type thermostat includes a fixed bracket and a temperature adjusting rod, a bellows, and a temperature control module coaxially arranged on the fixed bracket. The main body of the fixed bracket is in a "U"-shaped frame structure and forms an inner groove, and both ends of the fixed bracket are provided with connection and cooperation parts. The temperature control module is provided with fastening connection parts corresponding to the connection and cooperation parts on the opposite side. The temperature control module is connected to the fixed bracket through the cooperation of the fastening connection parts and the connection and cooperation parts, and its pressure receiving end extends into the inner groove. The temperature adjusting rod is threadedly connected to the base of the fixed bracket, and its inner end is in a pushing and matching relationship with one end of the bellows. The other end of the bellows abuts or is adjacent to the pressure receiving end of the temperature control module. The bellows is connected with a temperature sensing cylinder through a capillary tube.

[0005] The purpose of the present invention can also be solved by adopting the following technical measures: As a more specific solution, an axial through hole is provided in the temperature adjusting rod. One end of the bellows is provided with a guiding rod, and the guiding rod is inserted into the axial through hole. A temperature adjusting rod is threadedly connected in the axial through hole, and the temperature adjusting rod can be adjusted to push against the upper end of the guiding rod.

[0006] As a further solution, the temperature control module includes a snap-action main body. An opening is provided at the corresponding pressure receiving end of the snap-action main body. A steel sheet that can bulge and deform is connected to the opening. A protrusion that abuts or is adjacent to the steel sheet is provided at the other end of the bellows. And a make-and-break switch connected in series on the circuit is provided in the snap-action main body. There is a movable push rod abutted between the make-and-break switch and the steel sheet.

[0007] As a further solution, the sudden jump body includes a main body shell, a steel sheet support block is provided on the top of the main body shell, a guide through hole is opened in the center of the steel sheet support block to form a linear sliding fit with the movable push rod, the steel sheet is placed on the steel sheet support block and fixed by a sealing cover, and the opening is opened on the sealing cover.

[0008] As a further solution, the on-off switch includes a moving contact piece and a stationary contact piece arranged in the main shell, one end of the moving contact piece and the stationary contact piece is provided with contacts that elastically touch each other, 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 shell and are each connected to a connecting plug.

[0009] 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.

[0010] As a further solution, an adjusting screw hole is provided on the base of the fixed bracket, the outer side surface of the temperature adjusting rod is provided with an external threaded portion that cooperates with the thread of the adjusting screw hole, and the outer side of the temperature adjusting rod is connected to a limit pendulum block that rotates with the temperature adjusting rod, and a limit baffle is extended from the base of the fixed bracket to control the reciprocating swing of the limit pendulum block in the forward and reverse directions.

[0011] 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.

[0012] 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.

[0013] As a further solution, a slit is formed at the outer end of the temperature regulating rod along the length direction, and at least the upper portion of the temperature regulating rod is exposed in the slit.

[0014] The beneficial effects of the present invention are as follows: The present invention discloses a simple and small automatic reset liquid expansion type thermostat, which has the advantages of simple structure, easy assembly, small size, wide application range, reliable action, more precise temperature control, stable and reliable performance and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the structure of an embodiment of the present invention.

[0016] Figure 2 Schematic diagram of the sectional structure of the present invention.

[0017] Figure 3 Schematic diagram of the exploded structure of the present invention.

[0018] Figure 4 Schematic diagram of the structure of the fixing bracket of the present invention. Detailed implementation manners

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

[0020] As Figures 1 to 4 shown, a simple and small automatic reset liquid expansion type thermostat includes a fixing bracket 1, a temperature adjusting rod 2 coaxially arranged on the fixing bracket 1, a diaphragm box 3 and a temperature control module 4. The main body of the fixing bracket 1 is in a "U"-shaped frame structure and forms an inner groove 101, and connecting and matching parts are provided at both ends of the fixing bracket 1. Corresponding fastening connection parts are provided on the opposite sides of the temperature control module 4. The temperature control module 4 is connected to the fixing bracket 1 through the cooperation of the fastening connection parts and the connecting and matching parts, and its pressure receiving end extends into the inner groove 101. The temperature adjusting rod 2 is threadedly connected to the base 11 of the fixing bracket 1, and its inner end is in a pushing fit with one end of the diaphragm box 3. The other end of the diaphragm box 3 abuts against or is adjacent to the pressure receiving end of the temperature control module 4. The diaphragm box 3 is connected with a temperature sensing cylinder 6 through a capillary tube 5.

[0021] This liquid expansion type thermostat has a simple structure, is easy to assemble, has a small volume, a wide application range, reliable operation, more accurate temperature control, stable and reliable performance, and a long service life.

[0022] An axial through hole 201 is provided in the temperature adjusting rod 2. A guiding rod 31 is provided at one end of the diaphragm box 3. The guiding rod 31 is inserted into the axial through hole 201. A temperature adjusting rod 7 is threadedly connected in the axial through hole 201. The temperature adjusting rod 7 can be adjusted to push against the upper end of the guiding rod 31. After leaving the factory, the user can rotate the temperature adjusting rod 2 to adjust the temperature for sensing. However, during the debugging process at the time of leaving the factory, the temperature adjusting rod 7 can be screwed in and out to finely adjust the distance between the temperature adjusting rod 2 and the diaphragm box 3, thereby improving the accuracy of the temperature.

[0023] The temperature control module 4 includes a jump body 41, and an opening 401 is provided at the pressure-bearing end of the jump body 41, and a steel sheet 42 that can be agitated and deformed is connected to the opening 401. The other end of the membrane box 3 is provided with a protrusion 32 that is against or adjacent to the steel sheet 42, and an on-off switch 43 connected in series to the conductor path is provided in the jump body 41, and a movable push rod 44 is against the on-off switch 43 and the steel sheet 42; when the temperature sensing tube 6 is heated and causes the membrane box 3 to expand, the protrusion 32 of the membrane box 3 presses against the steel sheet 42, thereby disconnecting the on-off switch 43.

[0024] The jump body 41 includes a main body shell 411, and a steel sheet support block 412 is provided on the top of the main body shell 411. A guide through hole 4121 is provided in the center of the steel sheet support block 412 to form a linear sliding fit with the movable push rod 44. The steel sheet 42 is placed on the steel sheet support block 412 and is sealed and fixed by a cover 413. The opening 401 is provided on the cover 413. The steel sheet 42 is fixed by the steel sheet support block 412, and the structure is simple and easy to assemble.

[0025] The on-off switch 43 includes a moving contact piece 431 and a stationary contact piece 432 arranged in the main shell 411, and one end of the moving contact piece 431 and the stationary contact piece 432 is provided with a contact 433 that elastically touches each other, and the other end of the moving contact piece 431 and the stationary contact piece 432 are connected with a rivet 434, which extends out of the bottom of the main shell 411 and is respectively connected with a connecting plug 435; the above structure belongs to the conventional structure of the jump type temperature controller and will not be elaborated here.

[0026] The fastening connection part includes a connecting ear 414 connected to the cover 413 on the opposite side and a separate fixing bolt 8, and a through hole 415 is provided on the connecting ear 414; the connecting matching part includes a flange 13 bent outward from the side of the fixing bracket 1, and the flange 13 is against the connecting ear 414, and a fastening screw hole 131 is provided corresponding to the through hole 415. The through hole 415 and the fastening screw hole 131 are penetrated by the fixing bolt 8 to realize the assembly connection between the temperature control module 4 and the fixing bracket 1; the fixing bolt 8 is used for assembly and fixing, the connection is firm, the installation is simple, and the production efficiency is high.

[0027] An adjusting screw hole 14 is provided on the base 11 of the fixed bracket 1, and an external threaded portion 202 is provided on the outer side of the temperature adjusting rod 2 which is threadedly matched with the adjusting screw hole 14, and a limit swing block 9 which rotates with the temperature adjusting rod 2 is connected to the outer side thereof, and a limit baffle 15 which controls the reciprocating swing of the limit swing block 9 is extended on the base 11 of the fixed bracket 1; the limit baffle 15 can limit the rotation angle of the temperature adjusting rod 2 to prevent the temperature adjusting rod 2 from being out of contact with the membrane box 3 when it is too far out, and from causing damage to the membrane box 3 when it is too far in.

[0028] The two side plates of the fixing bracket 1 are respectively connected to the ends of the base 11 and extend downward. The two side edges 12 of the base 11 are folded upward by continuous bending to form connecting feet 16. The connecting feet 16 are provided with mounting screw holes 17 for assembling the liquid expansion type thermostat; the connecting feet 16 are mainly used to assemble the liquid expansion type thermostat to the carrier.

[0029] In addition, in this embodiment, the above-mentioned fastening screw hole 131, adjusting screw hole 14 and mounting screw hole 17 are all formed by opening a through hole 102 on the fixing bracket 1, and then an internal thread ring 10 is welded on one side of the through hole 102. The internal thread ring 10 and the through hole 102 are formed to form the fastening screw hole 131, adjusting screw hole 14 and mounting screw hole 17.

[0030] The fixed bracket 1 is made of an integral metal material, and a bendable soft edge 18 is punched outward from one side plate. The capillary 5 has at least one section covered with a protective sleeve 51, and the protective sleeve 51 is clamped on the fixed bracket 1 through the bendable soft edge 18; it can fix one end of the capillary 5, play a role in leading out and guiding, and can protect the capillary 5.

[0031] The outer end of the temperature regulating rod 2 is provided with a slit 203 along the length direction, and at least the upper part of the temperature regulating rod 7 is exposed in the slit 203; the slit 203 can be used to observe whether the temperature regulating rod 7 is installed in the temperature regulating rod 2, and to observe the depth of the temperature regulating rod 7 being screwed in.

[0032] 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 automatic reset liquid expansion type thermostat, characterized by: It includes a fixed bracket, a temperature adjustment rod coaxially arranged on the fixed bracket, a diaphragm box, and a temperature control module. The main body of the fixed bracket is in a "U"-shaped frame structure and forms an inner groove. Both ends of the fixed bracket are provided with connecting and mating parts. On the opposite sides of the temperature control module, there are fastening connection parts corresponding to the connecting and mating parts. The temperature control module is connected to the fixed bracket through the cooperation of the fastening connection parts and the connecting and mating parts, and its pressure-receiving end extends into the inner groove. The temperature adjustment rod is threadedly connected to the base of the fixed bracket, and its inner end is in a pushing and mating relationship with one end of the diaphragm box. The other end of the diaphragm box abuts or is adjacent to the pressure-receiving end of the temperature control module. The diaphragm box is connected with a temperature-sensitive cylinder through a capillary tube; the temperature control module includes a snap-action main body. An opening is provided at the position corresponding to the pressure-receiving end of the snap-action main body. A steel sheet that can bulge and deform is connected at the opening. A protrusion that abuts or is adjacent to the steel sheet is provided at the other end of the diaphragm box. A make-and-break switch connected in series on the circuit is arranged inside the snap-action main body. An actuating push rod abuts between the make-and-break switch and the steel sheet.

2. A simple and small automatic reset liquid expansion type thermostat according to claim 1, characterized in that: An axial through hole is provided inside the temperature adjustment rod. A guide rod is provided at one end of the diaphragm box. The guide rod is inserted into the axial through hole. A temperature adjustment rod is threadedly connected inside the axial through hole. The temperature adjustment rod can be adjusted to push against the upper end of the guide rod.

3. A simple and small automatic reset liquid expansion type thermostat according to claim 1, characterized in that: The snap-action main body includes a main body housing. A steel sheet support block is provided at the top of the main body housing. A guide through hole that forms a linear sliding fit with the actuating push rod is provided at the center of the steel sheet support block. The steel sheet is placed on the steel sheet support block and is fixedly sealed through a cover. The opening is provided on the cover.

4. A simple and small automatic reset liquid expansion type thermostat according to claim 3, characterized in that: The make-and-break switch includes a moving contact piece and a static contact piece arranged inside the main body housing. One ends of the moving contact piece and the static contact piece are provided with contact heads that elastically touch each other. The other ends of the moving contact piece and the static contact piece are both connected with rivets. The rivets extend out of the bottom of the main body housing and are respectively connected with connecting inserts.

5. A simple and small automatic reset liquid expansion type thermostat according to claim 3, characterized in that: The fastening connection part includes connecting ears connected to the cover on the opposite sides and separate fixing bolts. Through holes are provided on the connecting ears; the connecting and mating part includes a flanging bent outward from the side part of the fixed bracket. The flanging abuts against the connecting ear and is provided with fastening screw holes corresponding to the through holes. The temperature control module is assembled and connected to the fixed bracket by passing the fixing bolts through the through holes and the fastening screw holes.

6. A simple and small automatic reset liquid expansion type thermostat according to claim 1, characterized in that: Adjusting screw holes are provided on the base of the fixed bracket. An external thread part that is threadedly matched with the adjusting screw holes is provided on the outer side surface of the temperature adjustment rod. A limiting swing block that rotates with the temperature adjustment rod is connected to the outer side of the temperature adjustment rod. A limiting baffle for controlling the forward and reverse reciprocating swing of the limiting swing block extends from the base of the fixed bracket.

7. A simple and small automatic reset liquid expansion type thermostat according to claim 1, characterized in that: The two side plates of the fixed bracket are respectively connected to the ends of the base and extend downward. Connecting feet are continuously bent and turned upward from both sides of the base. Mounting screw holes for assembling a liquid-expansion type thermostat are provided on the connecting feet.

8. A simple and small automatic reset liquid expansion type thermostat according to claim 1, characterized in that: The fixed bracket is integrally made of a metal material. A bendable soft edge is stamped outward on one of the side plates. At least one section of the capillary tube is sleeved with a protective sleeve. The protective sleeve is clamped on the fixed bracket through the bendable soft edge.

9. A simple and small automatic reset liquid expansion type thermostat according to claim 2, characterized in that: A slit is provided along the length direction at the outer end of the temperature adjustment rod. At least the upper part of the temperature adjustment rod is exposed in the slit.

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