CN110491726B - Liquid expansion type temperature controller - Google Patents
Liquid expansion type temperature controller Download PDFInfo
- Publication number
- CN110491726B CN110491726B CN201910861488.XA CN201910861488A CN110491726B CN 110491726 B CN110491726 B CN 110491726B CN 201910861488 A CN201910861488 A CN 201910861488A CN 110491726 B CN110491726 B CN 110491726B
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- CN
- China
- Prior art keywords
- movable contact
- contact
- liquid expansion
- temperature controller
- pressure spring
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 title claims abstract description 28
- 239000002775 capsule Substances 0.000 claims abstract description 12
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 210000000078 claw Anatomy 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 241001330002 Bambuseae Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 3
- 238000005452 bending Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 description 5
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/36—Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation
- H01H37/40—Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation with diaphragm
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
A liquid expansion type temperature controller is characterized in that a push rod component is arranged between a lug and a movable contact piece of a diaphragm capsule, and the push rod component consists of a shell barrel, a pressure spring and a push head. Because the push rod component with the pressure spring is adopted, the movable contact piece can be prevented from being damaged due to excessive pressing, and the push rod component has the advantages of simple structure, low cost and reliable action.
Description
Technical Field
The invention relates to the technical field of temperature controllers, in particular to a liquid expansion type temperature controller.
Background
The liquid expansion type temperature controller is widely applied to heating control of electric water heaters, electric ovens, electric fryers and the like, and the temperature of the temperature sensing part is sensed to rise and fall so as to expand or contract special working medium liquid filled and sealed in the temperature sensing assembly, so that the diaphragm capsule is inflated or restored, and the micro switch is pushed to be turned on or off, thereby controlling the on or off of the electric heating element to realize temperature control.
Chinese patent CN2524358Y "body expansion pressure type small-sized adjustable temperature controller" discloses a liquid expansion type temperature controller with direct pushing structure. However, such thermostats have the following disadvantages: when the temperature controller works at the highest temperature, working medium liquid in the probe 22 (equivalent to a temperature sensing cylinder) expands to be larger and flows to the diaphragm box 13 through the capillary tube 21, so that the diaphragm box 13 expands to push the top bead 16 (equivalent to a push rod) to enable a reed (equivalent to a movable contact piece) of the movable contact assembly 17 to move downwards, and the contact is opened. If the user screws the adjusting shaft 8 to the forced closing position through the knob, the adjusting shaft 8 moves further downwards along the screw thread of the cover 7 (corresponding to the main body), the overlapped bellows 13 is displaced due to expansion, the liquid is incompressible, the two are overlapped to cause the pushing amount of the top bead 16 to be excessively large, and the reed of the contact assembly 17 may be excessively pressed to generate permanent plastic deformation, so that the action temperature characteristic of the temperature controller is changed, and even the temperature controller is disabled.
The liquid expansion type temperature controller with the direct pushing structure commonly used at present has the same defects as the technical proposal of the patent.
Disclosure of Invention
The invention aims to solve the technical problem of providing a liquid expansion type temperature controller, which can prevent a movable contact piece from generating permanent plastic deformation due to overlarge pushing quantity of a push rod, and can keep the action temperature characteristic stable and unchanged when a user twists an adjusting shaft to a forced shutdown position in a high-temperature state.
The technical proposal of the invention is as follows:
The liquid expansion type temperature controller comprises a switch component, a temperature sensing component, a partition board, a main body, a tower spring, a limit plate, a temperature regulating screw and an adjusting shaft, wherein the switch component consists of a switch box, a movable terminal, a contact plate frame, a movable contact plate, a fixed terminal, a movable contact and a fixed contact, the movable terminal is connected with the contact plate frame through the screw, the movable contact plate is arranged on the contact plate frame, the movable contact is riveted on the front end of the movable contact plate, the fixed contact is fixedly connected with the fixed terminal through a bridge plate and the screw, the temperature sensing component consists of a diaphragm capsule, a capillary tube and a temperature sensing cylinder, the temperature sensing component is internally filled and sealed with a liquid, the adjusting shaft is in threaded rotation connection with the main body, the limit plate is riveted on the adjusting shaft into an integrated structure, the limit part of the limit plate is in limit contact connection with the limit lug of the corresponding main body, the upper top of the diaphragm capsule enters the adjusting shaft and is in contact connection with the bottom spring of the temperature regulating screw, a tower is arranged between the periphery of the diaphragm capsule and the partition board, the diaphragm capsule is fixedly connected with the upper part of the cylindrical push rod, the cylindrical compression spring is arranged between the lower part of the cylindrical push rod and the cylindrical shell, the cylindrical compression spring is formed by the cylindrical compression spring is connected with the cylindrical compression spring, the cylindrical compression spring is connected with the cylindrical compression spring is formed by the cylindrical compression spring, the bottom of the small head of the push head is in contact connection with the boss at the rear part of the movable contact piece.
The pressure spring is a cylindrical helical compression spring. The initial pressure of the pressure spring is larger than the thrust to the movable contact required by normal on-off of the temperature controller switch and smaller than the plastic deformation force which can not be elastically restored due to the excessive pushing of the movable contact. The push head is made of ceramic materials. The shell is formed by deep drawing and stamping a metal plate or strip. The number of the vertical claws of the shell cylinder is 2-12.
The working principle of the invention is as follows:
The pressure spring has certain initial pressure when forming the push rod subassembly, and this pressure is greater than the thrust of switch module normal break-make, therefore the pressure spring pushes up the push head to the minimum position that contacts with perpendicular claw during normal break-make, and the push rod subassembly is a rigid body, and according to the rising of temperature, the shell section of thick bamboo cylinder portion outer wall of push rod subassembly slides from top to bottom along the guide hole of baffle and promotes movable contact piece and make the switch break-make, and the temperature controller can normal action.
When the temperature controller regulating shaft is at the highest temperature position and the working medium liquid expands to make the diaphragm capsule expand to the switch off, if the regulating shaft is screwed to the forced shutdown position, the push rod assembly is further pushed downwards, the reaction force of the push rod assembly is increased along with the deformation of the movable contact piece, and when the reaction force of the movable contact piece is larger than the initial pressure of the pressure spring, the pressure spring is compressed, and the push head slides upwards along the inner wall of the cylindrical part of the shell barrel, so that the push head is prevented from being further pressed down. As long as the initial pressure of the pressure spring is smaller than the pushing force which can make the movable contact piece generate plastic deformation, the movable contact piece cannot be crushed by the pushing head.
Compared with the prior art, the invention has the following remarkable effects:
the invention can realize the overvoltage protection of the liquid expansion type temperature controller with the direct pushing structure on the movable contact by adopting the push rod component with the pressure spring structure, can not damage the action temperature characteristic of the temperature controller even when the adjusting shaft is screwed to the forced shutdown position in a high temperature state, and can keep the advantages of simple structure and small volume.
Drawings
Fig. 1 is a schematic structural view of an adjusting shaft of a liquid expansion type temperature controller in the highest position.
Fig. 2 is a schematic structural view of an adjusting shaft of a liquid expansion type temperature controller in a forced shutdown position.
Fig. 3 is a schematic bottom view of the connection between the pusher and the cartridge shown in fig. 1.
The reference numerals in the figures denote: 1. the switch box, 2, a movable terminal, 3, a contact frame, 4, a movable contact, 5, a static terminal, 6,7, a static contact, 8, a baffle plate, 8-1, a guide hole, 9, a main body, 10, a tower spring, 11, a push head, 11-1, a big head, 11-2, a small head, 12, a limit plate, 13, a temperature regulating screw, 14, an adjusting shaft, 15, a diaphragm box, 15-1, a handle, 15-2, a lug, 16, a capillary tube, 17, a temperature sensing cylinder, 18, a shell cylinder, 18-1, a cylindrical part, 18-2, a vertical claw and 19, a pressure spring.
Detailed Description
The invention is further illustrated by the following examples.
Referring to figures 1-3, a liquid expansion type temperature controller comprises a switch component, a temperature sensing component, a baffle 8, a main body 9, a tower spring 10, a limit plate 12, a temperature regulating screw 13 and an adjusting shaft 14, wherein the switch component consists of a switch box 1, a movable terminal 2, a contact plate frame 3, a movable contact plate 4, a static terminal 5, a movable contact 6 and a static contact 7, the movable terminal 2 is connected with the contact plate frame 3 through screws, the movable contact plate 4 is arranged on the contact plate frame 3, the movable contact 6 is riveted on the front end of the movable contact plate 4, the fixed contact 7 is fixedly connected with the static terminal 5 through a bridge piece and screws, the temperature sensing component consists of a diaphragm capsule 15, a capillary tube 16 and a temperature sensing cylinder 17, the inside of the temperature sensing component is filled with and sealed with liquid working medium, the adjusting shaft 14 is in threaded rotation connection with the main body 9, the limit plate 12 is riveted on the adjusting shaft 14 to form an integrated structure, a limit part 12-1 of the limit plate 12 is connected with a limit boss 9-1 of the corresponding main body 9, a limit spring 15-1 is in contact with a limit plate, a pressure spring 15-15 is arranged in contact with a cylindrical sleeve 11-1, a pressure spring 11 is arranged between the top of the push rod 11-2 and the baffle 11 and the outer sleeve 11 is arranged at the bottom of the push rod 11-2, the push rod 11 is connected with the top of the baffle 11-18, the pressure spring 11-18 is arranged between the push rod 11 and the push rod 11-2 and the pressure spring 11 and the top 11 and the baffle 2, the large head 11-1 of the push head 11 is in up-down sliding connection with the inner cylindrical surface of the cylindrical part 18-1 of the shell 18, a plurality of vertical claws 18-2 are arranged at the lower end part of the cylindrical part 18-1 of the shell 18, the vertical claws 18-2 are bent inwards to deform so as to hold the large head 11-1 of the push head tightly, the upper top of the shell 18 is in contact connection with the bellows boss 15-2, and the bottom of the small head 11-2 of the push head is in contact connection with the boss at the rear part of the movable contact 4.
The compression spring 19 is a cylindrical helical compression spring. The initial pressure of the pressure spring 19 is larger than the thrust to the movable contact 4 required by the normal on-off of the temperature controller switch, and smaller than the force for starting to generate plastic deformation which can not be elastically restored due to the excessive pushing of the movable contact 4. The push head 11 is made of a ceramic material. The shell 18 is formed by deep drawing from a sheet metal or strip. The number of the vertical claws 18-2 of the shell is 2-12.
The working process of the liquid expansion type temperature controller is as follows:
When the temperature controller is normally controlled Wen Tongduan, the initial pressure of the pressure spring 19 pushes the push head 11 to the lowest position contacted with the vertical claw 18-2, the push rod component is a rigid body, and according to the rising and falling of the temperature, the outer column surface of the cylindrical part 18-1 of the shell barrel of the push rod component slides up and down along the guide hole 8-1 of the partition plate 8 to push the movable contact 4 to act so as to switch on and off.
When the temperature controller adjusting shaft 14 is at the highest temperature position and the working medium liquid expands to make the diaphragm capsule 15 expand to the switch off, if the adjusting shaft 14 is screwed to the forced shutdown position, the push head 11 of the push rod assembly is further pushed downwards, the reaction force is increased along with the increase of the deformation of the movable contact piece 4, when the reaction force is larger than the initial pressure of the pressure spring 19, the pressure spring 19 is compressed, the push head 11 relatively slides upwards along the inner wall of the cylindrical part 18-1 of the shell 18, thereby preventing the push head 11 from being further pressed down, preventing the movable contact piece 4 from being crushed, and ensuring the action temperature characteristic of the temperature controller to be stable and unchanged.
Claims (6)
1. The utility model provides a liquid expansion temperature controller, includes switch module, temperature sensing subassembly, baffle (8), main part (9), tower spring (10), spacing piece (12), temperature regulating screw (13), regulating spindle (14), switch module comprises switch box (1), movable terminal (2), contact frame (3), movable contact (4), dead terminal (5), movable contact (6), dead contact (7), movable terminal (2) pass through the screw with contact frame (3) are connected, movable contact (4) are installed on contact frame (3), movable contact (6) rivet is on movable contact (4) front end, dead contact (7) pass through bridge piece and screw with dead terminal (5) fixed connection, the temperature sensing subassembly comprises diaphragm capsule (15), capillary (16), temperature sensing section of thick bamboo (17), the inside liquid working medium that fills and seal of temperature sensing subassembly, regulating spindle (14) with main part (9) make threaded rotation connection, spacing piece (12) rivet is in regulating spindle (14) are on spacing piece (1-9) of spacing piece (1) that corresponds to limit structure on regulating spindle (14), the handle (15-1) of the diaphragm capsule (15) enters the adjusting shaft (14) and the upper top of the handle (15-1) is in contact connection with the bottom of the temperature adjusting screw (13), and a tower spring (10) is arranged between the periphery of the diaphragm capsule protrusion (15-2) and the partition plate (8), and is characterized in that: the membrane box is characterized in that a push rod assembly is arranged between the membrane box boss (15-2) and the movable contact piece (4), the push rod assembly consists of a shell barrel (18), a pressure spring (19) and a push head (11), the push head (11) consists of a large head part (11-1) and a small head part (11-2), the outer cylindrical surface of the cylindrical part (18-1) of the shell barrel (18) is in vertical sliding connection with the guide hole (8-1) of the partition board (8), a pressure spring (19) is arranged between the shell barrel (18) and the push head (11), the cylindrical outer cylindrical surface of the large head part (11-1) of the push head (11) is in vertical sliding connection with the inner cylindrical surface of the cylindrical part (18-1) of the shell barrel (18), a plurality of vertical claws (18-2) are arranged at the lower end part of the cylindrical part (18-1), the vertical claws (18-2) are tightly held by inwards bending deformation, and the upper part (18) is connected with the membrane box boss (4) in a contact mode.
2. The liquid expansion thermostat of claim 1, wherein: the pressure spring (19) is a cylindrical helical compression spring.
3. The liquid expansion thermostat of claim 1, wherein: the initial pressure of the pressure spring (19) is larger than the thrust to the movable contact piece (4) required by the normal on-off of the temperature controller switch, and is smaller than the plastic deformation force which can not be elastically restored due to the excessive pushing of the movable contact piece (4).
4. The liquid expansion thermostat of claim 1, wherein: the push head (11) is made of ceramic material.
5. The liquid expansion thermostat of claim 1, wherein: the shell (18) is formed by deep drawing and stamping a metal plate or strip.
6. The liquid expansion thermostat of claim 1, wherein: the number of the vertical claws (18-2) of the shell is 2-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910861488.XA CN110491726B (en) | 2019-09-12 | 2019-09-12 | Liquid expansion type temperature controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910861488.XA CN110491726B (en) | 2019-09-12 | 2019-09-12 | Liquid expansion type temperature controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110491726A CN110491726A (en) | 2019-11-22 |
| CN110491726B true CN110491726B (en) | 2024-08-02 |
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ID=68557706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910861488.XA Active CN110491726B (en) | 2019-09-12 | 2019-09-12 | Liquid expansion type temperature controller |
Country Status (1)
| Country | Link |
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| CN (1) | CN110491726B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111370259A (en) * | 2020-03-18 | 2020-07-03 | 佛山市顺德区汇控电器制造有限公司 | Multiple regulation thermal expansion temperature controller |
| CN112469238B (en) * | 2020-10-23 | 2022-08-19 | 广东求精电气有限公司 | Regulator cubicle with dampproofing function |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210223892U (en) * | 2019-09-12 | 2020-03-31 | 佛山通宝华盛电热控制器有限公司 | Liquid expansion type temperature controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791873B (en) * | 2015-05-14 | 2017-08-25 | 郑伟 | A kind of energy-saving house heating system |
| CN107610975A (en) * | 2017-10-30 | 2018-01-19 | 佛山通宝华盛电热控制器有限公司 | A kind of gas expansion type temperature controller |
| CN107610976B (en) * | 2017-10-31 | 2019-10-25 | 佛山通宝华盛电热控制器有限公司 | A kind of hand reset liquid expansion temp limiter |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210223892U (en) * | 2019-09-12 | 2020-03-31 | 佛山通宝华盛电热控制器有限公司 | Liquid expansion type temperature controller |
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| Publication number | Publication date |
|---|---|
| CN110491726A (en) | 2019-11-22 |
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