A manual liquid expansion automatic controller

Abstract

The utility model relates to a manual liquid expansion type automatic controller, comprising a base and a sudden jump temperature controller connected to the base, an action cavity is defined between the sudden jump temperature controller and the base, a membrane box is arranged in the action cavity, a capillary leading out of the base is connected to the membrane box, and a temperature sensing tube is connected to the other end of the capillary; the sudden jump temperature controller comprises a shell, an on-off switch and a lever metal sheet are arranged in the shell, the lever metal sheet faces the action cavity and is adjacent to or against the membrane box, the lever metal sheet is provided with a reset steel sheet close to it, a switch rod for controlling the on-off switch is provided between the reset steel sheet and the on-off switch, a reset rod is slidably connected to the outer side of the shell, and the inner end of the reset rod is adjacent to or against the on-off switch or the reset steel sheet; this automatic controller has a simple and reasonable structure and low production cost, and utilizes the reset steel sheet to maintain the disconnected state of the on-off switch, which can effectively prevent the automatic controller from being repeatedly powered on.

Description

Technical Field

[0001] The utility model relates to the field of temperature controllers, in particular to a manual liquid expansion type automatic controller. Background Art

[0002] The existing liquid expansion thermostat is a device that controls the temperature by the expansion and contraction of the liquid. It adopts the principle of expansion and contraction of liquid under temperature changes, and controls the temperature by controlling the change of the volume of the liquid in the material; the common liquid expansion thermostat uses the lever principle to drive the switch on and off action, and has the characteristics of accurate temperature control, long life, stability and reliability, small temperature difference between on and off, large temperature control adjustment range, large load current and convenient installation, but still has the following defects: First, the volume is too large, which will be subject to certain limitations. Its base is made of ceramic. During the production process, there are often problems such as large size consistency differences, easy breakage, deformation, etc., which cannot meet the requirements of automated production, large losses and low efficiency. Second, there is no manual reset structure. After the membrane box of the liquid expansion thermostat is reset, the switch can be connected again, so that the device installed with the liquid expansion thermostat will be heated repeatedly, so it is necessary to further improve the liquid expansion thermostat. Summary of the invention

[0003] The utility model aims to provide a manual liquid expansion type automatic controller which has a simple and reasonable structure, is easy to install and has a stable structure.

[0004] A manual liquid expansion type automatic controller comprises a base and a sudden jump temperature controller connected to the base, an action cavity is defined between the sudden jump temperature controller and the base, a membrane box is arranged in the action cavity, a capillary leading out of the base is connected to the membrane box, and a temperature sensing tube is connected to the other end of the capillary; the sudden jump temperature controller comprises a shell, an on-off switch and a lever metal sheet are arranged in the shell, the outer side surface of the lever metal sheet faces the action cavity and is adjacent to or against the membrane box, the inner side surface of the lever metal sheet is provided with a reset steel sheet close to it, a switch rod for controlling the on-off switch is provided between the reset steel sheet and the on-off switch, a reset rod is slidably connected to the outer side of the shell, and the inner end of the reset rod is adjacent to or against the on-off switch or the reset steel sheet.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, the sudden jump thermostat is detachably connected to the base via a fastening unit.

[0007] As a further solution, a push rod extends from the center of the membrane box toward the lever metal sheet, the membrane box is adjacent to or against the outer side of the lever metal sheet through the push rod, and the push rod, switch rod and reset rod are arranged on the same central axis.

[0008] As a further solution, the membrane box is provided with a connecting tube extending out of the base, the connecting tube is connected to one end of the capillary tube, and a clamping ring is provided at the joint position between the connecting tube and the capillary tube.

[0009] As a further solution, the sudden jump temperature controller also includes a cover riveted on the shell, the lever metal sheet and the reset steel sheet are pressed between the cover and the shell in sequence, and a coaxial opening is opened on the cover, and the central part of the outer side of the lever metal sheet is exposed to the action cavity through the opening.

[0010] As a further solution, an outer side of the shell is provided with an external guide hole, and an inner side of the external guide hole is provided with a limiting step surface; the reset rod includes a rod body that forms a linear sliding fit with the external guide hole, a rod head is provided at the outer end of the rod body, and a limiting ring extends from the rod body and is placed in the shell, and the limiting ring is abutted against the limiting step surface.

[0011] As a further solution, the shell includes a cup-shaped outer shell and an end cover, the end cover is sealed at the opening of the outer shell through a sealing cover, the on-off switch is arranged between the outer shell and the end cover, the lever metal sheet and the reset steel sheet are pressed in sequence between the sealing cover and the end cover, an inner guide hole is opened on the end cover, and the switch rod is slidably connected in the inner guide hole.

[0012] As a further solution, the bottom wall of the base is provided with a lead-out hole adapted for the capillary, the bottom surface of the base is provided with an open through groove, one end of the open through groove is connected to the lead-out hole, and the other end of the open through groove is arranged on the side wall of the base.

[0013] As a further solution, a thermostat mounting seat is provided on the base, and an assembly port and a connecting through-hole for adapting to the sudden jump thermostat are provided on the thermostat mounting seat. A base connecting hole is provided on the base corresponding to the connecting through-hole; a connecting ear is extended on the opposite side of the cover, and a cover connecting hole is provided on the connecting ear corresponding to the connecting through-hole. The sudden jump thermostat is assembled and connected to the base by passing a fastening unit through the cover connecting hole, the connecting through-hole and the base connecting hole.

[0014] As a further solution, the on-off switch includes a moving contact piece and a fixed contact piece placed in a shell, the moving contact piece and the fixed contact piece are elastically contacted and connected, the switch rod is adjacent to or abuts against one end face of the moving contact piece, the reset rod is adjacent to or abuts against the other end face of the moving contact piece, and the moving contact piece and the fixed contact piece are respectively riveted with two terminal pieces placed outside the shell.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. Small size, low cost, the base is made of high-temperature materials, with the advantages of high precision, fire retardant, small deformation coefficient, low price and cost reduction.

[0017] 2. After the automatic controller uses the reset steel sheet to reset the lever metal sheet, the on-off switch remains in the off state, which can effectively prevent the automatic controller from being repeatedly powered on and heated.

[0018] 3. The diaphragm box and the base are riveted together to form an integral unit, and then fixed to the base with bolts in conjunction with the sudden jump thermostat, which can play a role in installation positioning and support. The installation is simple and reliable, and prevents the thermostat from being loosened due to excessive insertion and extraction force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the automatic controller in the utility model.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the sudden jump thermostat in the utility model.

[0022] Figure 4 This is a schematic diagram of the exploded structure of the hand-held automatic controller in the utility model.

[0023] Figure 5 It is a schematic diagram of the bottom structure of the automatic controller in the utility model. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figures 1 to 5 As shown, a manual liquid expansion type automatic controller includes a base 1 and a sudden jump temperature controller 2 connected to the base 1, an action chamber 101 is defined between the sudden jump temperature controller 2 and the base 1, a membrane box 3 is arranged in the action chamber 101, a capillary 4 leading out of the outside of the base 1 is connected to the membrane box 3, and a temperature sensing tube 5 is connected to the other end of the capillary 4; the sudden jump temperature controller 2 includes a shell 21, an on-off switch 22 and a lever metal sheet 23 are arranged in the shell 21, the outer side surface of the lever metal sheet 23 faces the action chamber 101 and is adjacent to or against the membrane box 3, the inner side surface of the lever metal sheet 23 is provided with a reset steel sheet 24 close to it, a switch rod 25 for controlling the on-off switch 22 is provided between the reset steel sheet 24 and the on-off switch 22, and a reset rod 26 is slidably connected to the outer side of the shell 21, and the inner end of the reset rod 26 is adjacent to or against the on-off switch 22.

[0026] After the lever metal sheet 23 is reset by the reset steel sheet 24, the on-off switch 22 is still kept in the disconnected state, which can effectively prevent the automatic controller from being repeatedly powered on and repeatedly heated.

[0027] The base 1 is made of a high temperature resistant material, which includes plastic; the base 1 is small in size and low in cost. The base 1 is made of high temperature material and has the advantages of high precision, fire retardancy, small deformation coefficient, low price, and reduced cost.

[0028] In addition, the membrane box 3 and the base 1 are integrated by riveting, and the sudden jump thermostat 2 is fixed to the base 1 with bolts, which can play the role of installation positioning and support. The installation is simple and reliable, and the problem of bolt loosening caused by excessive plugging and unplugging force of the thermostat is prevented.

[0029] The sudden jump thermostat 2 is detachably connected to the base 1 via a fastening unit; the sudden jump thermostat 2 can form an independent module, which can be easily installed and replaced.

[0030] A push rod 31 is extended from the center of the diaphragm box 3 toward the lever metal sheet 23. The diaphragm box 3 is adjacent to or against the outer side surface of the lever metal sheet 23 through the push rod 31, and the push rod 31, the switch rod 25 and the reset rod 26 are arranged on the same central axis. The push rod 31 responds to the deformation action of the diaphragm box 3, so that the diaphragm box 3 and the lever metal sheet 23 can maintain a distance, and the push rod 31 pushes the center position of the lever metal sheet 23, so that the deformation of the lever metal sheet 23 is more crisp.

[0031] During the use of the automatic controller with the above structure, after the temperature sensing tube 5 senses the temperature rise, the liquid inside the temperature sensing tube 5 is converted into gas, and the expanded gas flows into the membrane box 3 through the capillary 4, and the gas opens the membrane box 3, so that the push rod 31 pushes against the lever metal sheet 23, and the lever metal sheet 23 moves inward and drives the reset steel sheet 24 to deform together, and the reset steel sheet 24 pushes the switch rod 25, and the switch rod 25 disconnects the on-off switch 22, thereby disconnecting the working circuit;

[0032] After the temperature-sensing tube 5 cools down, the gas in the diaphragm box 3 is converted back into liquid and flows into the temperature-sensing tube 5. At this time, the diaphragm box 3 contracts and causes the push rod 31 to leave the lever metal sheet 23. The lever metal sheet 23 naturally resets without any force, but the reset steel sheet 24 remains deformed, supporting the switch rod 25 and avoiding the on-off switch 22 from resetting and energizing. At this time, the user manually presses the reset rod 26, and the reset rod 26 slides into the housing 21 to push the on-off switch 22. The on-off switch 22 drives the switch rod 25 and the reset steel sheet 24 to reset, and finally the on-off switch 22 is connected to the working circuit again.

[0033] The membrane box 3 is provided with a connecting tube 32 extending out of the base 1, the connecting tube 32 is connected to one end of the capillary 4, and a clamping ring 7 is provided at the joint position between the connecting tube 32 and the capillary 4; this structure can fix the capillary 4.

[0034] The sudden jump thermostat 2 also includes a cover 27 riveted on the shell 21, and the lever metal sheet 23 and the reset steel sheet 24 are pressed in sequence between the cover 27 and the shell 21, and a coaxial opening 271 is opened on the cover 27, and the central part of the outer side surface of the lever metal sheet 23 is exposed to the action cavity 101 through the opening 271; the cover 27 is mainly used to fix the lever metal sheet 23 and the reset steel sheet 24, and the exposed lever metal sheet 23 can be directly contacted and held by the push rod 31.

[0035] An outer side of the shell 21 is provided with an outer guide hole 211, and an inner side of the outer guide hole 211 is provided with a limiting step surface 212; the reset rod 26 includes a rod body 261 that forms a linear sliding fit with the outer guide hole 211, and a rod head 262 is provided at the outer end of the rod body 261, and a limiting ring 263 arranged in the shell 21 is extended from the rod body 261, and the limiting ring 263 is supported on the limiting step surface 212; the outer guide hole 211 ensures that the reset rod 26 can slide linearly, and cooperates with the rod head 262 and the limiting ring 263 to control the sliding reset of the reset rod 26.

[0036] The shell 21 includes a cup-shaped outer shell 28 and an end cover 29. The end cover 29 is encapsulated at the opening of the outer shell 28 by a sealing cover 27. The on-off switch 22 is arranged between the outer shell 28 and the end cover 29. The lever metal sheet 23 and the reset steel sheet 24 are pressed in turn between the sealing cover 27 and the end cover 29. An inner guide hole 291 is opened on the end cover 29. The switch rod 25 is slidably connected in the inner guide hole 291. The inner guide hole 291 ensures that the switch rod 25 can slide in a straight line, and the lever metal sheet 23 and the reset steel sheet 24 are encapsulated by the sealing cover 27 and the end cover 29.

[0037] The bottom wall of the base 1 is provided with a lead-out hole 102 adapted for the capillary 4, and the bottom surface of the base 1 is provided with an open through groove 103, one end of the open through groove 103 is connected to the lead-out hole 102, and the other end of the open through groove 103 is arranged on the side wall of the base 1; in the present embodiment, the capillary 4 is led out from the bottom center of the base 1, while in other embodiments, the capillary 4 can be led out from the side of the base 1 through the lead-out hole 102 and the open through groove 103, so that the automatic controller can adapt to different installation requirements.

[0038] The base 1 is provided with a thermostat mounting base 6, and the thermostat mounting base 6 is provided with an assembly port 61 adapted to the sudden jump thermostat 2, and a connecting through hole 62, and the base 1 is provided with a base connecting hole 104 corresponding to the connecting through hole 62; a connecting ear 272 extends on the opposite side of the cover 27, and the connecting ear 272 is provided with a cover connecting hole 273 corresponding to the connecting through hole 62, and a fastening unit such as a screw passes through the cover connecting hole 273, the connecting through hole 62 and the base connecting hole 104, so that the sudden jump thermostat 2 is assembled and connected with the base 1; the structure is simple, and the assembly is convenient and quick, which is suitable for the needs of automated production.

[0039] The on-off switch 22 includes a movable contact piece 221 and a fixed contact piece 222 disposed in the housing 21, the movable contact piece 221 and the fixed contact piece 222 are elastically contacted and connected, the switch rod 25 is adjacent to or abuts against one end surface of the movable contact piece 221, the reset rod 26 is adjacent to or abuts against the other end surface of the movable contact piece 221, and the movable contact piece 221 and the fixed contact piece 222 are respectively riveted with two terminal pieces 223 disposed outside the housing 21;

[0040] The connection structure between the fixed contact piece 222 and the terminal piece 223 belongs to the prior art and will not be elaborated in detail here. The movable contact piece 221 includes a fixed portion 224 connected to the terminal piece 223 and a movable portion 225 bent between the fixed portion 224 and the fixed contact piece 222, and an avoidance through hole 226 corresponding to the reset rod 26 is opened on the fixed portion 224. This structure enables the movable contact piece 221 to be compactly built into the housing 21, so that the movable contact piece 221 and the reset rod 26 are each in the most ideal position without interfering with each other.

[0041] The shape of the thermostat mounting base 6 matches the shape of the base 1, and a lower fool-proofing protrusion 105 extends from the outer wall facing side of the base 1, and an upper fool-proofing protrusion 601 with the same shape as the lower fool-proofing protrusion 105 extends from the outer wall facing side of the thermostat mounting base 6; the efficiency of installing the thermostat mounting base 6 to the base 1 is improved, so that the connecting through hole 62 on the thermostat mounting base 6 can be quickly aligned with the base connecting hole 104 on the base 1.

[0042] The base 1 is provided with a plurality of support bosses 106 extending from below the bottom surface thereof, and the support bosses 106 are provided with internal thread connection holes 107; the hydraulic expansion automatic controller can be installed on the use equipment by matching the threaded column with the internal thread connection holes 107.

[0043] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A manual liquid expansion automatic controller, characterized in that : It includes a base and a sudden jump thermostat connected to the base, an action cavity is defined between the sudden jump thermostat and the base, a membrane box is arranged in the action cavity, a capillary leading out of the base is connected to the membrane box, and the other end of the capillary is connected to a temperature sensing tube; the sudden jump thermostat includes a shell, an on-off switch and a lever metal sheet are arranged in the shell, the outer side surface of the lever metal sheet faces the action cavity and is adjacent to or against the membrane box, the inner side surface of the lever metal sheet is provided with a reset steel sheet close to it, a switch rod for controlling the on-off switch is provided between the reset steel sheet and the on-off switch, a reset rod is slidably connected to the outer side of the shell, and the inner end of the reset rod is adjacent to or against the on-off switch or the reset steel sheet.

2. A manual liquid expansion automatic controller according to claim 1, characterized in that The sudden jump thermostat is detachably connected to the base through a fastening unit.

3. A manual liquid expansion automatic controller according to claim 1, characterized in that A push rod is extended from the center of the membrane box toward the lever metal sheet, and the membrane box is arranged adjacent to or against the outer side surface of the lever metal sheet through the push rod, and the push rod, the switch rod and the reset rod are arranged on the same central axis.

4. A manual liquid expansion automatic controller according to claim 1, characterized in that The membrane box is provided with a connecting tube extending out of the base, the connecting tube is connected to one end of the capillary tube, and a clamping ring is provided at the joint position between the connecting tube and the capillary tube.

5. A manual liquid expansion automatic controller according to claim 1, characterized in that The sudden jump temperature controller also includes a cover riveted on the shell, the lever metal sheet and the reset steel sheet are pressed between the cover and the shell in sequence, and a coaxial opening is opened on the cover, and the central part of the outer side of the lever metal sheet is exposed to the action cavity through the opening.

6. A manual liquid expansion automatic controller according to claim 1, characterized in that An outer guide hole is provided on the outer side of the shell, and a limit step surface is provided on the inner side of the outer guide hole; the reset rod includes a rod body that forms a linear sliding fit with the outer guide hole, a rod head is provided on the outer end of the rod body, and a limit ring is extended from the rod body and placed in the shell, and the limit ring is abutted against the limit step surface.

7. A manual liquid expansion automatic controller according to claim 5, characterized in that The shell includes a cup-shaped outer shell and an end cover, the end cover is sealed at the opening of the outer shell through a sealing cover, the on-off switch is arranged between the outer shell and the end cover, the lever metal sheet and the reset steel sheet are pressed in sequence between the sealing cover and the end cover, an inner guide hole is opened on the end cover, and the switch rod is slidably connected in the inner guide hole.

8. A manual liquid expansion automatic controller according to claim 1, characterized in that The bottom wall of the base is provided with a lead-out hole adapted for the capillary, the bottom surface of the base is provided with an open through groove, one end of the open through groove is connected to the lead-out hole, and the other end of the open through groove is arranged on the side wall of the base.

9. A manual liquid expansion automatic controller according to claim 5, characterized in that : The base is provided with a thermostat mounting seat, and the thermostat mounting seat is provided with an assembly port adapted to the sudden jump thermostat and a connecting through hole, and the base is provided with a base connecting hole corresponding to the connecting through hole; a connecting ear extends on the opposite side of the cover, and the connecting ear is provided with a cover connecting hole corresponding to the connecting through hole, and a fastening unit is passed through the cover connecting hole, the connecting through hole and the base connecting hole to make the sudden jump thermostat assembled and connected to the base.

10. A manual liquid expansion automatic controller according to claim 1, characterized in that The on-off switch includes a moving contact piece and a fixed contact piece placed in a shell, the moving contact piece and the fixed contact piece are elastically contacted and connected, the switch rod is adjacent to or abuts against one end face of the moving contact piece, the reset rod is adjacent to or abuts against the other end face of the moving contact piece, and the moving contact piece and the fixed contact piece are respectively riveted with two terminal pieces placed outside the shell.

11. A manual liquid expansion automatic controller according to claim 9, characterized in that The shape of the thermostat mounting seat matches the shape of the base, a lower fool-proofing protrusion extends from the outer wall facing side of the base, and an upper fool-proofing protrusion with the same shape as the lower fool-proofing protrusion extends from the outer wall facing side of the thermostat mounting seat.

12. A manual liquid expansion automatic controller according to claim 1, characterized in that The base is provided with a plurality of supporting bosses extending from below its bottom surface, and the supporting bosses are provided with internal threaded connecting holes.

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