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CN-121983464-A - Automatic reset type bimetallic strip temperature controller with PTC power-off function

CN121983464ACN 121983464 ACN121983464 ACN 121983464ACN-121983464-A

Abstract

The invention discloses an automatic reset type bimetallic strip temperature controller with PTC outage, which belongs to the technical field of temperature controllers and comprises a shell, wherein a sealing cover matched with the shell is arranged at the top of the shell, wiring terminals are connected to the two ends of the shell, a bimetallic strip is connected to the top of the inner wall of the shell, a PTC thermistor is connected to one side of a passive layer on the bimetallic strip through a push rod, the PTC thermistor is connected with the bottom end of the inner wall of the shell through a first spring, moving contacts which are movably abutted against fixed contacts are arranged at the two ends of the PTC thermistor in a serial connection mode, and limiting grooves are connected to the moving contacts along the height direction of a partition plate. The invention can solve the technical problems that the safety of the temperature controller is reduced by a single circuit separation point, and the fire extinguishing mechanism for the inflammable material in the temperature controller is not corresponding, thereby being further unfavorable for the safe use of the controller.

Inventors

  • LIN FU
  • PENG JIANHUA

Assignees

  • 江西唯信电子有限公司

Dates

Publication Date
20260505
Application Date
20260306

Claims (8)

  1. 1. The utility model provides a take PTC outage automatic re-setting formula bimetallic strip temperature controller which characterized in that includes: The device comprises a shell (1), wherein a sealing cover (2) matched with the shell is arranged at the top of the shell (1), wiring terminals (3) are connected to two ends of the shell (1), a bimetallic strip (4) is connected to the top of the inner wall of the shell (1), a PTC thermistor (6) is connected to one side of a passive layer on the bimetallic strip (4) through a pushing rod (5), and the PTC thermistor (6) is connected with the bottom end of the inner wall of the shell (1) through a first spring (7); The PTC thermistor is characterized in that moving contacts (9) which are movably abutted against fixed contacts (8) are arranged at two ends of the PTC thermistor (6) in a serial connection mode, limiting grooves are formed in the moving contacts (9) along the height direction of a partition board (10), one ends of the moving contacts (9) are abutted against and attached to a wiring end (3) through telescopic parts (11), movable ends of a pushing rod (5) and the telescopic parts (11) are connected through swinging rods (12), sealing plates (13) are fixedly arranged on the pushing rod (5), and sealing cavities are formed among the sealing plates (13), the fixed contacts (8) and the partition board (10) together.
  2. 2. The automatic reset bimetal temperature controller with PTC power-off according to claim 1, wherein two ends of the swinging rod (12) are respectively arranged on the pushing rod (5) and the telescopic part (11) in a rotating connection mode, the pushing rod (5) is driven to move downwards along with the heating of the bimetal (4), the PTC thermistor (6) is heated and the resistance is raised, the moving contact (9) is separated on the fixed contact (8), the movable ends on the wiring end (3) and the telescopic part (11) are separated, and meanwhile, the volume compression of the sealing cavity is reduced.
  3. 3. The automatic reset bimetal temperature controller with the PTC power-off function according to claim 1, further comprising a positioning and mounting mechanism (14) connected with the temperature controller, wherein the positioning and mounting mechanism (14) comprises a base (16) provided with a positioning groove (15), a shielding plate (17) is connected to the top end of the base (16) through a side plate, a driving motor (18) is fixedly arranged at the center of the shielding plate (17), an output shaft of the driving motor (18) penetrates through the shielding plate (17) and extends to a first conical gear (19), and two ends of the first conical gear (19) are in meshed transmission with a second conical gear (21) fixed on a first screw shaft (20).
  4. 4. A bimetallic strip temperature controller with PTC outage automatic resetting according to claim 3, wherein one end of the first screw shaft (20) extends onto the driving wheel (22), the outer wall of the first screw shaft (20) is spirally driven with a first sliding block (23), the extending end of the first sliding block (23) is connected with a sliding groove along the length direction of the inner wall of the shielding plate (17), two ends of the first sliding block (23) are connected onto the moving plate (24) through brackets, and the central shaft on the first conical gear (19) extends onto the second screw shaft (25) at the bottom of the shielding plate (17).
  5. 5. The automatic reset bimetal temperature controller with PTC power-off according to claim 4, wherein a second sliding block (26) is spirally driven on the second screw shaft (25), one side of the horizontal extending end of the second sliding block (26) is connected with a first scraping plate (27) arranged on the outer wall of the side plate, the other opposite side is connected with a telescopic rod (28) arranged at the bottom of the shielding plate (17), the bottom end of the first sliding block (23) is connected with a second scraping plate (30) arranged on the base (16) through a bending rod (29), and the bending rod (29) is connected with a strip-shaped groove along the length direction of the bottom of the shielding plate (17).
  6. 6. The automatic reset bimetal temperature controller with PTC power-off according to claim 4, wherein the driving wheel (22) is in transmission connection with the driven wheel (31) through a conveying belt (32), a rotating shaft (33) on the driven wheel (31) is connected to a baffle, a rotating groove connected with the rotating shaft (33) is formed in the edge of the outer wall of the baffle, a cleaning roller (34) is fixedly mounted at one end of the driven wheel (31) close to the center of the base (16), and a cleaning brush plate is mounted on the outer wall of the cleaning roller (34) in a viscous fixing mode.
  7. 7. A bimetallic strip temperature controller with PTC outage automatic resetting according to claim 3, characterized in that, the locating groove (15) is connected with a support plate (35) in a movable manner, two sides of the bottom end of the support plate (35) are connected with the bottom of the inner wall of the base (16) through a second spring (36), a tray (37) arranged at the bottom of the support plate (35) is arranged between the second springs (36), an upper piston (39) extending into the sleeve (38) is connected with the bottom of the tray (37), a first gear plate (40) is fixedly connected with the bottom of the upper piston (39), a second gear plate (42) which moves reversely is meshed and transmitted by a central rotating gear (41), and the bottom of the second gear plate (42) is fixed on the lower piston (43).
  8. 8. The automatic reset bimetal temperature controller with PTC outage according to claim 7, wherein the two ends of the central rotating tooth (41) are fixed on the inner wall of the sleeve (38) through bearings, an air cavity is formed between the upper piston (39) and the lower piston (43), the two ends of the air cavity are connected with an elastic air bag (45) arranged below the supporting plate (35) through a conduit (44), and a control valve matched with the air cavity is fixedly arranged on the conduit (44).

Description

Automatic reset type bimetallic strip temperature controller with PTC power-off function Technical Field The invention belongs to the technical field of temperature controllers, and particularly relates to an automatic power-off reset bimetallic strip temperature controller with a PTC. Background The bimetallic strip temperature controller is a temperature control device using bimetallic strips as temperature sensing elements, realizes contact on-off through the difference of thermal expansion and cold contraction of materials, and is mainly used for overheat protection of electrical equipment. When the electric appliance works normally, the bimetallic strip is in a free state, and the contact is closed or opened. When the temperature rises to a set value, the bimetallic strip deforms due to expansion and contraction to trigger a jump action, so that the contact is opened or closed rapidly, and the circuit is cut off to prevent the equipment from being damaged by overheating or to cause potential safety hazard. When the temperature is reduced to the reset temperature, the contact automatically recovers, and the normal operation of the equipment is recovered. The PTC power-off protection device is a device for realizing circuit protection by utilizing PTC characteristics and has the core working principle that the PTC power-off protection device presents a low-resistance state during normal operation and allows current to pass through. When overcurrent or abnormal temperature occurs in the circuit, the PTC material rapidly increases in resistance value due to expansion caused by heating, and the circuit is cut off. After the fault is removed, the PTC material contracts to recover to a low-resistance state along with the temperature reduction, so that automatic reset is realized. When the internal temperature of the electrical appliance is overhigh, the bimetallic strip temperature controller is generally separated from the fixed contact through the movable contact to realize corresponding open-circuit protection, but a single circuit separation point reduces the safety of the temperature controller, and in addition, the temperature controller is further unfavorable for the safe use of the controller because of no corresponding barrier fire extinguishing mechanism for inflammable materials in the temperature controller, and in addition, the temperature controller is generally not provided with a better protection mechanism when working outdoors, and is not protected by a better shielding mechanism, so that the temperature controller is inconvenient to position during working, reduces the working efficiency and is unfavorable for personnel operation. Disclosure of Invention The invention aims to provide an automatic reset bimetallic strip temperature controller with PTC power-off, which solves the technical problems that the safety of the temperature controller is reduced by a single circuit separation point, and in addition, a corresponding barrier fire extinguishing mechanism does not exist for inflammable materials in the temperature controller, so that the safety use of the controller is further not facilitated. In order to achieve the above purpose, the present invention adopts the following technical scheme: An automatic reset bimetal temperature controller with PTC power-off, comprising: The shell is characterized in that a sealing cover matched with the shell is arranged at the top of the shell, wiring terminals are connected to two ends of the shell, a bimetallic strip is connected to the top of the inner wall of the shell, a PTC thermistor is connected to one side of a passive layer on the bimetallic strip through a pushing rod, and the PTC thermistor is connected with the bottom end of the inner wall of the shell through a first spring; The PTC thermistor is characterized in that moving contacts which are movably abutted against the fixed contacts are arranged at two ends of the PTC thermistor in a serial connection mode, limiting grooves are formed in the moving contacts along the height direction of the partition plate, one ends of the moving contacts are abutted against the wiring end through the telescopic parts, the movable ends of the push rod and the telescopic parts are connected through the swing rod, the push rod is fixedly provided with a sealing plate, and a sealing cavity is formed among the sealing plate, the fixed contacts and the partition plate. Further, both ends of the swinging rod are respectively arranged on the pushing rod and the telescopic part in a rotating connection mode, the pushing rod is driven to move downwards along with the heating of the bimetallic strip, the PTC thermistor is heated and the resistance is increased, the moving contact is separated on the fixed contact, the wiring end is separated from the movable end on the telescopic part, and meanwhile, the volume compression of the sealing cavity is reduced. Further, still include the location installation mechan