CN210489523U

CN210489523U - Thermal protector

Info

Publication number: CN210489523U
Application number: CN201921620501.4U
Authority: CN
Inventors: 庞栋梁
Original assignee: Suzhou Industrial Park Kain Electronic Sci & Tech Co ltd
Current assignee: Suzhou Industrial Park Kain Electronic Sci & Tech Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-05-08
Anticipated expiration: 2029-09-27

Abstract

The utility model provides a thermal protector, include: the casing, the casing bottom is equipped with the static contact, the one end of static contact is provided with the static contact, the other end and the first binding post of static contact are connected, bimetallic element one end is provided with the movable contact, the movable contact is contacted with the static contact, the bimetallic element other end is connected with second binding post, the second through-hole that runs through is seted up to casing a lateral wall, first binding post part stretches out the second through-hole, second binding post part stretches out the second through-hole, the casing inside wall is provided with information acquisition group, information acquisition group includes temperature sensor and pressure sensor, the casing inside wall is provided with the ventilation solenoid valve, temperature sensor, pressure sensor and ventilation solenoid valve are connected with the treater respectively. As described above, the utility model discloses a thermal protector for the casing of solving thermal protector can take place to break and warp under the change of atmospheric pressure, influences the problem of thermal protector's protection effect.

Description

Thermal protector

Technical Field

The utility model relates to a thermal protection technical field especially relates to a thermal protector.

Background

The consumer produces the hidden danger of power consumption safety easily when meetting current voltage value unstability, and current hot protective device mainly accomplishes circuit protection through bimetallic strip, but among the prior art, after hot protector is heated, the air in the hot protector can be heated the inflation, when hot protector falls to the normal atmospheric temperature, and the inside air is preferential to meet cold shrink volume. When the thermal protector is used for a long time, the shell of the thermal protector can be broken and deformed under the action of the change of air pressure, so that the protection effect of the thermal protector is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide a hot protector for after solving hot protector among the prior art and being heated, the air in the hot protector can be heated the inflation, when the hot protector falls to the normal atmospheric temperature, and the inside air is preferential to meet cold shrink volume. The shell of the thermal protector can be broken and deformed under the change action of air pressure after being used for a long time, and the protection effect of the thermal protector is influenced.

To achieve the above and other related objects, the present invention provides a thermal protector, comprising: the device comprises a shell, a fixed contact, a movable contact, a bimetallic element and a fixed contact, wherein the fixed contact is arranged at the bottom of the shell, the fixed contact is arranged at one end of the fixed contact, the other end of the fixed contact is connected with a first wiring terminal, a support frame is arranged on the inner side wall of the top of the shell, a first through hole is formed in the support frame corresponding to the bimetallic element, the bimetallic element penetrates through the first through hole, the movable contact is arranged at one end of the bimetallic element, the movable contact is contacted with the fixed contact, the other end of the bimetallic element is connected with a second wiring terminal, a penetrating second through hole is formed in one side wall of the shell, the first wiring terminal part extends out of the second through hole, the second wiring terminal part extends out of the second through hole, resin glue for sealing holes is arranged in the second through hole, and an information acquisition group, the information acquisition group comprises a temperature sensor and a pressure sensor, a ventilation solenoid valve is arranged on the inner side wall of the shell, and the temperature sensor, the pressure sensor and the ventilation solenoid valve are respectively connected with the processor.

Preferably, a PTC heating element is arranged in the housing, a first conductive surface of the PTC heating element is connected with the static contact, a second conductive surface of the PTC heating element is connected with the bimetal element far away from the movable contact end, when the protected electrical equipment and device generate heat due to a fault, the bimetal element rapidly reverses when sensing a preset temperature and pulls the movable contact and the static contact to be disconnected, the PTC heating element starts to work, the PTC heating element supplements heat to the bimetal element at a constant heating temperature, so that the bimetal element cannot recover from turnover due to temperature reduction, and the circuit of the protected electrical equipment and device is in a disconnected state for a long time, thereby ensuring the absolute safety of the protected electrical equipment and device.

Preferably, the PTC heating element is a ceramic PTC heating element, which has a simple structure, a rapid temperature rise, a rapid temperature compensation, and a long service life.

According to the preferable technical scheme, a baffle is arranged in the shell, a cavity is formed between the baffle and the side wall, provided with the second through hole, of the shell, the bimetallic element is partially arranged in the cavity, the static contact piece is partially arranged in the cavity, a drying box is arranged in the cavity, a drying agent is arranged in the drying box, the drying box is fixedly connected with the baffle, and the baffle and the drying agent are arranged, so that external moisture can be prevented from invading and being damped.

As a preferred technical scheme, the static contact is fixed at the bottom of the shell through a rivet, and the static contact is fixed at the bottom of the shell through the rivet and does not change in position.

As a preferable technical scheme, the fixed contact and the movable contact are both rectangular, and the rectangular fixed contact and the rectangular movable contact reduce materials and reduce cost under the condition of ensuring large contact surfaces.

As described above, the utility model relates to a thermal protector has following beneficial effect: through the cooperation of the temperature sensor, the pressure sensor, the ventilation electromagnetic valve and the processor, when the temperature sensor detects that the temperature in the shell reaches a preset temperature threshold value, the processor controls the ventilation electromagnetic valve to be opened, and the shell is communicated with the outside; when the pressure sensor detects that the pressure in the shell reaches a preset pressure threshold value, the processor controls the ventilation electromagnetic valve to be opened, the shell is communicated with the inside and the outside, the shell is prevented from being broken and deformed under the change action of air pressure, the design is reasonable, and the pressure sensor is suitable for production, popularization and application.

Drawings

Fig. 1 is a schematic structural view of a thermal protector disclosed in an embodiment of the present invention;

fig. 2 is a diagram showing a state that a thermal protector generates heat when an electrical appliance and equipment to be protected fails according to an embodiment of the present invention;

fig. 3 shows a side view of a thermal protector disclosed in an embodiment of the present invention;

fig. 4 is a perspective view of a thermal protector disclosed in an embodiment of the present invention;

fig. 5 is a block diagram of an information collection set in a thermal protector disclosed in an embodiment of the present invention;

fig. 6 shows a connection block diagram of a thermal protector disclosed in an embodiment of the present invention.

Wherein the reference numerals are specified as follows: 1. a housing; 2. a bimetallic element; 3. a movable contact; 4. a stationary contact; a PTC heating element; 6. a support frame; 7. a baffle plate; 8. drying the box; 9. a second connection terminal; 10. a first connection terminal; 11. a temperature sensor; 12. a pressure sensor; 13. a processor; 14. a ventilation solenoid valve; 15. a static contact piece; 16. a second via.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1 to 6. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1 to 6, the present invention provides a thermal protector, including: the casing 1, the stationary contact 4, the movable contact 3, the bimetallic element 2 and the stationary contact 15, the stationary contact 15 is arranged at the bottom of the casing 1, the stationary contact 4 is arranged at one end of the stationary contact 15, the other end of the stationary contact 15 is connected with the first connecting terminal 10, the inner side wall of the top of the casing 1 is provided with the support frame 6, the support frame 6 is provided with a first through hole corresponding to the bimetallic element 2, the bimetallic element 2 penetrates through the first through hole, the movable contact 3 is arranged at one end of the bimetallic element 2, the movable contact 3 is contacted with the stationary contact 4, the other end of the bimetallic element 2 is connected with the second connecting terminal 9, a through second through hole 16 is arranged on one side wall of the casing 1, the first connecting terminal 10 extends out of the second through hole 16, the second connecting terminal 9 extends out of the second through hole 16, resin glue for sealing is arranged in the second through hole 16, an, a ventilation solenoid valve 14 is arranged on the inner side wall of the shell 1, and the temperature sensor 11, the pressure sensor 12 and the ventilation solenoid valve 14 are respectively connected with a processor 13.

In the thermal protector provided by the embodiment, the PTC heating element 5 is arranged in the shell 1, the first conductive surface of the PTC heating element 5 is connected with the static contact 15, the second conductive surface of the PTC heating element 5 is connected with the end, far away from the movable contact 3, of the bimetal element 2, by arranging the PTC heating element 5, when the electrical appliance and equipment to be protected generate heat due to the fault, the bimetal element 2 rapidly reverses to pull the movable contact 3 to be disconnected from the static contact 4 when sensing the preset temperature, the PTC heating element 5 starts to work, and the PTC heating element 5 supplements heat to the bimetal element 2 at the constant heating temperature, so that the bimetal element 2 cannot recover and overturn due to the temperature reduction, the circuit of the electrical appliance and equipment to be protected is in a disconnected state for a long time, and the absolute safety of the electrical appliance to be protected is ensured.

In the thermal protector provided by the embodiment, the PTC heating element 5 is a ceramic PTC heating element, which has a simple structure, a rapid temperature rise, a rapid temperature compensation and a long service life.

The thermal protector provided by the embodiment is characterized in that the baffle 7 is arranged in the shell 1, a cavity is formed between the baffle 7 and the side wall of the shell 1 provided with the second through hole 16, the part of the bimetallic element 2 is arranged in the cavity, the part of the static contact piece 15 is arranged in the cavity, the drying box 8 is arranged in the cavity, the drying agent is arranged in the drying box 8, the drying box 8 is fixedly connected with the baffle 7, and the baffle 7 and the drying agent are arranged, so that the external moisture can be prevented from invading and being damped.

In the thermal protector provided by the embodiment, the static contact 15 is fixed at the bottom of the shell 1 through a rivet, and the static contact 15 is fixed at the bottom of the shell 1 through the rivet without position change.

In the thermal protector provided by the embodiment, the fixed contact 4 and the movable contact 3 are both rectangular, and the rectangular fixed contact 4 and the rectangular movable contact 3 reduce materials and reduce cost under the condition of ensuring large contact surfaces.

In a specific use: when the protected electric appliances and equipment generate heat due to faults, the bimetallic element 2 senses the preset temperature and rapidly reverses to pull the movable contact 3 to be disconnected with the fixed contact 4, the temperature sensor 11 in the shell 1 detects that the temperature in the shell 1 is greater than a preset temperature threshold value, the processor 13 controls the ventilation electromagnetic valve 14 to be opened, or the pressure sensor 12 in the shell 1 detects that the pressure in the shell 1 is greater than a maximum pressure threshold value, and the processor 13 controls the ventilation electromagnetic valve 14 to be opened; after the faults of the protected electric appliances and equipment are repaired, the temperature in the shell 1 is reduced, the pressure sensor 12 in the shell 1 detects that the pressure in the shell 1 is smaller than the minimum pressure threshold value, and the processor 13 controls the ventilation electromagnetic valve 14 to be opened.

To sum up, the thermal protector of the present invention, through the cooperation of the temperature sensor 11, the pressure sensor 12, the ventilation solenoid valve 14 and the processor 13, when the temperature sensor 11 detects that the temperature in the housing 1 reaches the preset temperature threshold, the processor 13 controls the ventilation solenoid valve 14 to open, and the housing 1 is communicated inside and outside; when the pressure sensor 12 detects that the pressure in the shell 1 reaches a preset pressure threshold, the processor 13 controls the ventilation electromagnetic valve 14 to be opened, the shell 1 is communicated with the inside and the outside, the shell 1 is prevented from being broken and deformed under the change action of the air pressure, and the pressure sensor is reasonable in design and suitable for production, popularization and application. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A thermal protector, comprising: the device comprises a shell, a fixed contact, a movable contact, a bimetallic element and a fixed contact, wherein the fixed contact is arranged at the bottom of the shell, the fixed contact is arranged at one end of the fixed contact, the other end of the fixed contact is connected with a first wiring terminal, a support frame is arranged on the inner side wall of the top of the shell, a first through hole is formed in the support frame corresponding to the bimetallic element, the bimetallic element penetrates through the first through hole, the movable contact is arranged at one end of the bimetallic element, the movable contact is contacted with the fixed contact, the other end of the bimetallic element is connected with a second wiring terminal, a penetrating second through hole is formed in one side wall of the shell, the first wiring terminal part extends out of the second through hole, the second wiring terminal part extends out of the second through hole, resin glue for sealing holes is arranged in the second through hole, and an information acquisition group, the information acquisition group comprises a temperature sensor and a pressure sensor, a ventilation solenoid valve is arranged on the inner side wall of the shell, and the temperature sensor, the pressure sensor and the ventilation solenoid valve are respectively connected with the processor.

2. A thermal protector according to claim 1 wherein a PTC heating element is provided within the housing, a first conductive surface of the PTC heating element being connected to the fixed contact and a second conductive surface of the PTC heating element being connected to the bimetal element remote from the movable contact.

3. A thermal protector according to claim 2 in which the PTC heating element is a ceramic PTC heating element.

4. A thermal protector according to claim 1 wherein a baffle is provided within the housing, the baffle defining a cavity with the side wall of the housing having the second aperture therethrough, the bimetallic element being partially disposed within the cavity, the static contact being partially disposed within the cavity, a desiccant cartridge being disposed within the cavity, the desiccant cartridge being fixedly connected to the baffle.

5. A thermal protector according to claim 1 in which the static contact is fixed to the base of the housing by rivets.

6. A thermal protector according to claim 1 in which the fixed and movable contacts are rectangular.