CN218299741U - Electric equipment and temperature-limiting and over-temperature dual protection device thereof - Google Patents
Electric equipment and temperature-limiting and over-temperature dual protection device thereof Download PDFInfo
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- CN218299741U CN218299741U CN202221657599.2U CN202221657599U CN218299741U CN 218299741 U CN218299741 U CN 218299741U CN 202221657599 U CN202221657599 U CN 202221657599U CN 218299741 U CN218299741 U CN 218299741U
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Abstract
The utility model provides an electric equipment and a temperature-limiting and over-temperature double protection device thereof, which comprises a shell, a temperature-limiting protection component and an over-temperature protection component; the temperature limiting protection component comprises a static contact piece, a movable contact and a first temperature sensing component arranged on the movable contact; the first temperature sensing assembly is configured to acquire the working temperature of the electric equipment; the movable contact is configured to move between a first position and a second position, the movable contact is located at the first position when the working temperature of the electric equipment reaches a preset limited temperature value, the movable contact is separated from the static contact, and the movable contact is located at the second position when the working temperature of the electric equipment drops to a preset energy-conducting temperature value, and the movable contact is butted with the static contact again; the over-temperature protection assembly is configured to permanently cut off a built-in circuit of the over-temperature protection assembly when the working temperature of the electric equipment reaches a preset abnormal temperature value. The temperature-limiting and overtemperature-protection device aims to solve the problems that the positions of two temperature sensing points of the existing temperature-limiting and overtemperature-protection device are inconsistent, and the normal use of equipment is influenced by adopting a welding or riveting connection mode.
Description
Technical Field
The utility model relates to a temperature limiter and temperature fuse technical field, concretely relates to consumer and temperature limit excess temperature duplicate protection device thereof.
Background
Heating devices are generally used in electrical appliances such as humidifiers, fan heaters, air conditioners, sweeping robots, and the like, wherein heating elements such as heating wires, PTC heaters, and the like are mostly used.
At present, when the electric equipment normally works, the electric equipment is heated by using a temperature limiter, when the heat generated by a heating element reaches a designed value, a power supply needs to be cut off, and after the power supply is cut off, the temperature of a heating part of the electric equipment is gradually reduced under the influence of the ambient temperature; when the temperature of the heating element is reduced to a certain value, the electric equipment needs to be restored to work again, and the temperature limiter can well meet the application requirements. When the temperature of the electric equipment is abnormally increased due to a fault, a disposable temperature fuse is required to be used, and the electric equipment with the fault is stripped from the circuit. However, when the temperature limiter and the temperature fuse are used by the existing electric equipment at the same time, because the positions of the temperature sensing points of the existing temperature limiter and the temperature fuse are usually inconsistent, the temperature rise of the electric equipment sensed by the temperature limiter and the temperature fuse is also inconsistent, and the use of the equipment is influenced; most of the devices are connected with a temperature limiter and a temperature fuse together in a welding or riveting mode, but when the connecting mode is applied to humid environments such as humidifiers and sweeping robots, certain electric leakage risks exist, and the use of the devices is affected.
In view of this, the present application is presented.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an electric equipment and limit for temperature excess temperature duplicate protection device thereof can effectively solve two positions inconsistent of temperature sensing point of the limit for temperature excess temperature duplicate protection device among the prior art, and adopts welding or riveted connected mode more, and then influences the problem of electric equipment normal use.
The utility model discloses a temperature limit excess temperature duplicate protection device is provided, include: the temperature-limiting protection device comprises a shell, a temperature-limiting protection assembly arranged in a first cavity of the shell and an over-temperature protection assembly arranged in a second cavity of the shell;
the temperature limiting protection assembly comprises a static contact, a movable contact and a first temperature sensing assembly arranged on the movable contact, the static contact is connected with a first pin of the over-temperature protection assembly, and the movable contact and a second pin of the over-temperature protection assembly are used for being connected with electric equipment;
the first temperature sensing assembly is configured to acquire the current working temperature of the electric equipment;
the movable contact is configured to move between a first position and a second position, the movable contact is located at the first position when the current working temperature value of the electric equipment reaches a preset limited temperature value, the movable contact is separated from the static contact, and the movable contact is located at the second position and is abutted against the static contact again when the working temperature of the electric equipment drops to a preset conduction temperature value;
the over-temperature protection assembly is configured to be used for permanently cutting off a built-in circuit of the over-temperature protection assembly when the working temperature of the electric equipment reaches a preset abnormal temperature value.
Preferably, the housing is an insulating housing.
Preferably, the temperature limiting protection assembly further comprises a base disposed in the first chamber of the housing, and the static contact and the moving contact are disposed on the base.
Preferably, the first temperature sensing assembly is a bimetal.
Preferably, the over-temperature protection component comprises a temperature fuse, a first connection pin, a second connection pin, and resin arranged on the temperature fuse, one end of the temperature fuse is connected with the first connection pin, the other end of the temperature fuse is connected with the second connection pin, the first connection pin is connected with the static contact, and the second connection pin is used for being connected with electric equipment;
the temperature fuse is configured to be opened when the working temperature of the electric equipment reaches a preset abnormal temperature value;
wherein the resin is configured to cause the thermal fuse to rapidly shrink into a ball and adhere to the first and second connection pins after the thermal fuse is melted.
Preferably, the over-temperature protection component is an alloy type temperature fuse.
Preferably, the over-temperature protection component is an organic temperature fuse.
Preferably, the temperature-limiting protection device further comprises a first sealing assembly arranged on the temperature-limiting protection assembly and a second sealing assembly arranged on the over-temperature protection assembly.
The utility model also provides an electric equipment, including equipment body and as above arbitrary one limit for temperature excess temperature duplicate protection device, limit for temperature excess temperature duplicate protection device configuration is in on the equipment body.
In summary, according to the electric device and the temperature-limiting and over-temperature-exceeding dual protection device thereof provided by this embodiment, the temperature-limiting protection component and the over-temperature protection component are configured on the housing together, and can be installed at the most reliable temperature sensing position of the electric device together, at this time, the temperature sensing points of the temperature-limiting protection component and the over-temperature protection component are consistent, and the temperature sensing is synchronous, the temperature-limiting protection component is adopted to enable the device to reliably control the temperature-limiting requirement of the electric device, the over-temperature protection component is adopted to enable the device to accurately cut off the circuit when the electric device is abnormal, and the temperature-limiting and over-temperature-exceeding dual protection device has excellent service performance and good protection effect. Thereby solved two temperature sensing point's of limit for temperature excess temperature duplicate protection device among the prior art position nonconformity, and adopted welding or riveted connected mode more, and then influenced the problem of consumer normal use.
Drawings
Fig. 1 is a schematic structural diagram of a temperature-limiting and over-temperature dual protection device provided by the first aspect of the present invention.
Fig. 2 is a schematic structural diagram of the temperature limiting protection assembly and the over-temperature protection assembly provided by the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a housing of the temperature-limiting and over-temperature dual protection device provided by the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a temperature-limiting and over-temperature dual protection device provided by a second aspect of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Referring to fig. 1 to 2, a first embodiment of the present invention provides a temperature-limiting and over-temperature dual protection device, which includes: the temperature control device comprises a shell 1, a temperature limiting protection component 2 arranged in a first cavity of the shell 1 and an over-temperature protection component 3 arranged in a second cavity of the shell 1;
the temperature limiting protection component 2 comprises a static contact 22, a movable contact 23 and a first temperature sensing component 24 arranged on the movable contact 23, wherein the static contact 22 is connected with a first pin of the over-temperature protection component 3, and the movable contact 23 and a second pin of the over-temperature protection component 3 are used for being connected with electric equipment;
the first temperature sensing assembly 24 is configured to obtain a current working temperature of the electric device;
wherein said movable contact 23 is configured to move between a first position and a second position, said movable contact 23 being in said first position and said movable contact 23 being separated from said static contact 22 when the current operating temperature value of the consumer reaches a preset defined temperature value, said movable contact 23 being in said second position and said movable contact 23 being in re-abutment with said static contact 22 when the operating temperature of the consumer drops to a preset conductive temperature value;
wherein, the over-temperature protection component 3 is configured to permanently cut off the built-in circuit of the over-temperature protection component 3 when the working temperature of the electric equipment reaches a preset abnormal temperature value.
Heating devices are generally used in common electric appliances such as humidifiers, fan heaters, air conditioners, sweeping robots and the like, wherein heating elements such as heating wires, PTC heaters and the like are mostly adopted. At present, when the electric equipment normally works, the electric equipment is heated by using a temperature limiter, when the heat generated by a heating element reaches a designed value, a power supply needs to be cut off, and after the power supply is cut off, the temperature of a heating part of the electric equipment is gradually reduced under the influence of the ambient temperature; when the temperature of the heating element is reduced to a certain value, the electric equipment needs to be restored to work again, and the temperature limiter can well meet the application requirements. When the temperature of the electric equipment is abnormally increased due to a fault, a disposable temperature fuse is needed to be used, and the electric equipment with the fault is stripped from the circuit. However, when the temperature limiter and the temperature fuse are used by the existing electric equipment at the same time, because the positions of the temperature sensing points of the existing temperature limiter and the temperature fuse are usually inconsistent, the temperature rise of the electric equipment sensed by the temperature limiter and the temperature fuse is also inconsistent, and the use of the equipment is influenced; most of the devices are connected with a temperature limiter and a temperature fuse together in a welding or riveting mode, but when the connecting mode is applied to humid environments such as humidifiers and sweeping robots, certain electric leakage risks exist, and the use of the devices is affected.
Specifically, in the present embodiment, the first temperature sensing assembly 24 is used for precisely controlling the actuation temperature of the temperature limiter; the movable contact 23 is a contact which acts with an actuator (i.e. the first temperature sensing assembly 24), and the static contact 22 is a contact which does not act with the actuator (i.e. the first temperature sensing assembly 24); in general, the static contact 22 is still whether there is motion or not, and to realize the on-off control of the circuit, the moving contact 23 has a certain stroke to contact with or separate from the static contact 22, therefore, the moving contact 23 can move, and only the change of the position of the moving contact 23 can lead to the change of the circuit state. When the first temperature sensing assembly 24 detects that the current working temperature value of the electric equipment reaches a preset limited temperature value, the movable contact 23 is separated from the static contact 22, and when the first temperature sensing assembly 24 detects that the working temperature of the electric equipment is reduced to a preset conduction temperature value, the movable contact 23 is abutted against the static contact 22 again.
In this embodiment, the temperature-limiting and over-temperature-limiting dual protection device includes a temperature-limiting protection component 2, which is used for sensing the working temperature of the electric equipment, and acts to cut off the circuit when reaching the designed control or limited temperature value of the electric equipment, and when the electric equipment is cooled, the energy conduction state can be recovered, and the electric equipment can work again; and the over-temperature protection component 3 can sense the abnormal temperature rise of the electric equipment and permanently cut off the circuit when the electric equipment reaches the service life or has serious faults and the electric equipment is abnormally heated. The temperature-limiting and over-temperature-protecting component 2 and the over-temperature-protecting component 3 of the temperature-limiting and over-temperature-protecting dual-protection device are respectively arranged in the two cavities of the shell 1, and the first pin of the temperature-limiting and over-temperature-protecting component 2 is connected with the first pin of the over-temperature-protecting component 3 in an electric connection mode, so that the temperature-limiting and over-temperature-protecting component 2 and the over-temperature-protecting component 3 can be mounted at the position where the electrical equipment can sense the temperature most reliably, the temperature sensing points of the temperature-limiting and over-temperature-protecting components are consistent, and the temperature sensing is synchronous, therefore, the temperature-limiting and over-temperature-protecting dual-protection device can reliably control the temperature-limiting requirement of the electrical equipment and can accurately cut off a circuit when the electrical equipment is abnormal, and has excellent service performance and good protection effect.
In one possible embodiment of the present invention, the housing 1 may be an insulating housing.
In particular, in this embodiment, the insulating housing is a device that can isolate or wrap an electrified body with a non-conductive substance, so as to provide a safety measure for protecting against electric shock, and good insulation is the most basic and reliable means for ensuring safe operation of electrical equipment and lines and preventing personal electric shock; the insulating shell can be made of thermoplastic plastics such as PBT, nylon and PPS, can also be made of high-hardness insulating materials such as ceramic, and can also be made of metal materials such as iron, aluminum and stainless steel. It should be noted that, in other embodiments, other types of housings may also be adopted, which are not specifically limited herein, but these solutions are all within the protection scope of the present invention.
Referring to fig. 3, in a possible embodiment of the present invention, a first installation device 11 is disposed on the housing 1 for facilitating the fixing of the temperature-limiting and over-temperature-exceeding dual protection device and the electric equipment, wherein the first installation device 11 may be an installation hole, and the installation holes Kong Kekai are disposed on the left portion and the right portion of the housing 1 according to the actual situation of the electric equipment, so as to facilitate the fixing connection between the temperature-limiting and over-temperature-exceeding dual protection device and the electric equipment. It should be noted that, in other embodiments, the first mounting device and the fixing manner of other types of structures may also be adopted, which is not limited herein, but these solutions are all within the protection scope of the present invention.
Referring to fig. 4, in a possible embodiment of the present invention, a second mounting device 41 for facilitating the fixing of the temperature-limiting and over-temperature-exceeding dual protection device and the electrical equipment is disposed on the second housing 4, wherein the second mounting device 41 may be a mounting hole, and the mounting Kong Kekai is disposed at the front portion of the second housing 4 according to the actual situation of the electrical equipment, so as to facilitate the fixing connection between the temperature-limiting and over-temperature-exceeding dual protection device and the electrical equipment. It should be noted that, in other embodiments, the first mounting device and the fixing manner of other types of structures may also be adopted, which is not specifically limited herein, but these solutions are all within the protection scope of the present invention.
In a possible embodiment of the present invention, the temperature limiting protection assembly further comprises a base 21 disposed in the first cavity of the housing 1, and the static contact piece 22 and the movable contact 23 are disposed on the base 21.
Specifically, in the present embodiment, the base 21 is used for supporting the main components of the temperature limiting protection assembly, namely, the static contact piece 22, the movable contact piece 23 and the first temperature sensing assembly 24.
In one possible embodiment of the present invention, the first temperature sensing assembly 24 may be a bimetal.
Specifically, in this embodiment, the bimetal is composed of two layers of metal sheets with different bending rates, and when the current operating temperature of the electrical equipment changes, due to the difference in the bending rates, the bending degrees of the passive layer and the active layer of the bimetal are different, so that when the current operating temperature value of the electrical equipment reaches a preset limited temperature value, the bimetal drives the movable contact 23 to turn upwards, and at this time, the movable contact 23 is separated from the static contact 22; when the working temperature of the electric equipment is reduced to a preset energy-conducting temperature value, the bimetallic strip drives the movable contact 23 to turn downwards, and at the moment, the movable contact 23 is abutted against the static contact 22 again. It should be noted that, in other embodiments, the first temperature sensing assembly with other types of structures may also be adopted, which is not limited herein, but these solutions are all within the protection scope of the present invention.
In one possible embodiment of the present invention, the over-temperature protection component includes a thermal fuse 31, a first connection pin 32, a second connection pin 33, and a resin 34 disposed on the thermal fuse 31, one end of the thermal fuse 31 is connected to the first connection pin 32, the other end of the thermal fuse 31 is connected to the second connection pin 33, the first connection pin 32 is connected to the static contact 22, and the second connection pin 33 is used for connecting to an electrical device;
wherein the temperature fuse 31 is configured to open when the working temperature of the electric equipment reaches a preset abnormal temperature value;
wherein the special resin 34 is configured to make the thermal fuse 31 rapidly shrink into a ball after the thermal fuse 31 is melted, and adhere to the first connection pin 32 and the second connection pin 33.
Specifically, in the present embodiment, the first connection pin 32 and the second connection pin 33 are used for mounting the thermal fuse 31 and conducting current; the temperature fuse 31 is used for sensing the ambient temperature and cutting off the circuit at the designed abnormal temperature; the resin 34 is used to provide surface tension and help the thermal fuse 31 to shrink rapidly into a ball and attach to the ends of the first connection pin 32 and the second connection pin 33 after melting.
In a possible embodiment of the present invention, the over-temperature protection assembly 3 may be an alloy type thermal fuse.
In a possible embodiment of the present invention, the over-temperature protection component 3 may be an organic type thermal fuse.
Specifically, in this embodiment, the alloy type thermal fuse is a thermal fuse using a high temperature alloy as a temperature sensing material, and the operating principle is that a section of fusible alloy wire is connected between two pins of the thermal fuse, the fusible alloy wire is coated with resin, current can flow from one pin to the other pin, when the ambient temperature of the thermal fuse rises to its operating temperature, the fusible alloy melts and shrinks into a ball under the action of surface tension and the help of resin to be attached to the ends of the two pins, so that the circuit is permanently cut off. The organic matter type thermal fuse is a thermal fuse which adopts an organic matter pressing block as a temperature sensing material, wherein the thermal fuse is composed of a movable contact, a spring and a fusible body. That is, the spring expands, the movable contact is separated from the left lead wire, the circuit is opened, and the current between the movable contact and the left lead wire is cut off. It should be noted that, in other embodiments, the over-temperature protection assembly may also be in other types of structures, which are not specifically limited herein, but these solutions are all within the protection scope of the present invention.
In a possible embodiment of the present invention, the thermal insulation protection device further includes a first sealing component disposed on the temperature limiting protection component 2, and a second sealing component disposed on the over-temperature protection component 3.
Specifically, in this embodiment, the first sealing component and the second sealing component may be potting adhesive, and the temperature-limiting and over-temperature-protecting device seals the temperature-limiting and over-temperature-protecting component 2 and the over-temperature-protecting component 3 by using the potting adhesive, so that the temperature-limiting and over-temperature-protecting device becomes a rigid body, that is, an object whose shape and size do not change and whose relative positions of the internal points do not intersect each other during movement and after being stressed; the stability of the temperature-limiting and over-temperature-exceeding double protection device is improved to a certain extent, and the risk of electric leakage when the temperature-limiting and over-temperature-exceeding double protection device is in a humid environment is also avoided. The pouring sealant can be high-temperature-resistant epoxy resin, silica gel, UV sealant, cement glue or other pouring sealant which can seal the temperature-limiting and over-temperature-limiting dual protection device. It should be noted that, in other embodiments, pouring sealant with other types of structures may also be adopted, which is not specifically limited herein, but these schemes are all within the protection scope of the present invention.
In summary, according to the electric device and the temperature-limiting and over-temperature-exceeding dual protection device thereof provided by this embodiment, the temperature-limiting protection component and the over-temperature protection component are configured on the housing together, and can be installed at the most reliable temperature sensing position of the electric device together, at this time, the temperature sensing points of the temperature-limiting protection component and the over-temperature protection component are consistent, and the temperature sensing is synchronous, the temperature-limiting protection component is adopted to enable the device to reliably control the temperature-limiting requirement of the electric device, the over-temperature protection component is adopted to enable the device to accurately cut off the circuit when the electric device is abnormal, and the temperature-limiting and over-temperature-exceeding dual protection device has excellent service performance and good protection effect. Thereby solved two temperature sensing point's of limit for temperature excess temperature duplicate protection device among the prior art position nonconformity, and adopted welding or riveted connected mode more, and then influenced the problem of consumer normal use.
The second embodiment of the utility model provides an electric equipment, including equipment body and as above arbitrary one limit for temperature excess temperature duplicate protection device, limit for temperature excess temperature duplicate protection device configuration is in on the equipment body
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection.
Claims (9)
1. A temperature-limiting and over-temperature dual protection device is characterized by comprising: the temperature-limiting protection device comprises a shell, a temperature-limiting protection assembly arranged in a first cavity of the shell and an over-temperature protection assembly arranged in a second cavity of the shell;
the temperature limiting protection assembly comprises a static contact, a movable contact and a first temperature sensing assembly arranged on the movable contact, the static contact is connected with a first pin of the over-temperature protection assembly, and the movable contact and a second pin of the over-temperature protection assembly are used for being connected with electric equipment;
the first temperature sensing assembly is configured to acquire the current working temperature of the electric equipment;
the movable contact is configured to move between a first position and a second position, the movable contact is located at the first position when the current working temperature value of the electric equipment reaches a preset limited temperature value, the movable contact is separated from the static contact, and the movable contact is located at the second position and is abutted against the static contact again when the working temperature of the electric equipment drops to a preset conduction temperature value;
the over-temperature protection assembly is configured to be used for permanently cutting off a built-in circuit of the over-temperature protection assembly when the working temperature of the electric equipment reaches a preset abnormal temperature value.
2. The temperature-limited over-temperature dual protection device of claim 1, wherein the housing is an insulating housing.
3. The temperature limited excess temperature dual protection device of claim 1, wherein the temperature limited protection assembly further comprises a base disposed within the first chamber of the housing, the stationary contact and the movable contact being disposed on the base.
4. The temperature-limiting and over-temperature-limiting dual protection device as claimed in claim 1, wherein the first temperature sensing assembly is a bimetal.
5. The temperature-limiting and over-temperature-preventing dual protection device as claimed in claim 3, wherein the over-temperature protection component comprises a temperature fuse, a first connection pin, a second connection pin and a resin arranged on the temperature fuse, one end of the temperature fuse is connected with the first connection pin, the other end of the temperature fuse is connected with the second connection pin, the first connection pin is connected with the static contact, and the second connection pin is used for being connected with an electric device;
the temperature fuse is configured to be opened when the working temperature of the electric equipment reaches a preset abnormal temperature value;
wherein the resin is configured to cause the thermal fuse to rapidly shrink into a ball and adhere to the first and second connection pins after the thermal fuse is melted.
6. The temperature-limiting and over-temperature-protecting apparatus of claim 5, wherein the over-temperature protecting assembly is an alloy type temperature fuse.
7. The dual temperature-limiting and over-temperature-protecting apparatus of claim 5, wherein the over-temperature protecting assembly is an organic-based temperature fuse.
8. The temperature-limited excess temperature dual protection device of claim 1, further comprising a first seal assembly disposed on the temperature-limited protection assembly and a second seal assembly disposed on the excess temperature protection assembly.
9. An electric device, characterized by comprising a device body and the temperature-limiting and over-temperature-exceeding dual protection device as claimed in any one of claims 1 to 8, wherein the temperature-limiting and over-temperature-exceeding dual protection device is arranged on the device body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657599.2U CN218299741U (en) | 2022-06-30 | 2022-06-30 | Electric equipment and temperature-limiting and over-temperature dual protection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221657599.2U CN218299741U (en) | 2022-06-30 | 2022-06-30 | Electric equipment and temperature-limiting and over-temperature dual protection device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218299741U true CN218299741U (en) | 2023-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221657599.2U Active CN218299741U (en) | 2022-06-30 | 2022-06-30 | Electric equipment and temperature-limiting and over-temperature dual protection device thereof |
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| Country | Link |
|---|---|
| CN (1) | CN218299741U (en) |
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2022
- 2022-06-30 CN CN202221657599.2U patent/CN218299741U/en active Active
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