Miniature current temperature protector

Abstract

The utility model discloses a miniature current temperature protector, which belongs to the field of current temperature protection and comprises a shell, a bimetallic strip, a heating device, a contact mechanism and an external connecting end. A precision mounting chamber is arranged in the shell; the bimetallic strip and the heating strip are located in the precision mounting chamber, and the heating strip is thermally coupled with the bimetallic strip; the contact mechanism comprises a movable contact and a static contact, and the movable contact is in mechanical linkage with the bimetallic strip; according to the utility model, the bimetallic strip and the heating strip are installed in the precision installation chamber, when the bimetallic strip is overloaded, the bimetallic strip can generate heat, so that the bimetallic strip is deformed, a circuit is disconnected and current temperature protection is realized, and when the arranged heating strip is overloaded, the bimetallic strip is electrified to generate heat, so that the heating strip is not damaged. Therefore, the response speed is improved, and meanwhile, the problem that the bimetallic strip cannot be disconnected due to insufficient calorific value can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the current temperature protection field especially is small current temperature protector. BACKGROUND

[0002] In electrical equipment, due to large current, can cause overheat, thereby causing the common reason of equipment damage even the fire.

[0003] Although the traditional protection device such as fuse can provide overcurrent protection, but cannot effectively monitor temperature anomaly, there is deficiency in response speed and protection precision, difficult to meet the demand of modern electrical system to fast, accurate protection, therefore, to improve the safety and reliability of electrical system has important significance. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a small current temperature protector.

[0005] Technical scheme: including shell, bimetallic strip, heating device, contact mechanism and external connecting end, be equipped with precision installation chamber in the shell, bimetallic strip and heating strip are located in the precision installation chamber, and heating strip is thermally coupled with bimetallic strip, contact mechanism includes moving contact and stationary contact, and moving contact is mechanically linked with bimetallic strip, and external connecting end is connected with moving contact and stationary contact, and extends to the outside of shell, and the shell is made of high-performance engineering plastics, has good insulating property and mechanical strength, and heating strip is connected to controller, and when the current exceeds the set value, makes heating strip work.

[0006] By adopting the above technical scheme, bimetallic strip and heating strip are installed in the precision installation chamber, bimetallic strip generates heat when overload, thereby deforming, making the circuit disconnect, realizing current temperature protection, and the heating strip generates heat when overload, accelerating the thermal deformation of bimetallic strip, thereby improving the response speed, and the problem that bimetallic strip cannot disconnect due to insufficient heat generation can be avoided.

[0007] Optionally, the heating strip is a precision resistance wire, uniformly wound on a high-temperature-resistant support, and the support is installed on the inner side of the precision installation chamber and is made of wood material.

[0008] By adopting the above technical scheme, the resistance strip generates heat to heat the bimetallic strip.

[0009] Optionally, a fixing seat is installed on the outer end of the shell, and plug one and plug two are fixedly installed at both ends of the fixing seat, and the plug one and plug two are made of copper alloy material and plated with a silver layer on the surface to improve the conductivity and corrosion resistance.

[0010] By adopting the above technical scheme, the plug one and plug two are used for connecting the two ends of the circuit.

[0011] Optionally, the inner end of the plug one is provided with a fixed sheet one, the outer end of the fixed sheet one is fixedly installed with a bimetallic sheet, the inner end of the bimetallic sheet is provided with a moving contact, and the bimetallic sheet is a bimetallic sheet made of two kinds of materials.

[0012] By adopting the above technical scheme, the bimetallic sheet is of a fast response type, has high sensitivity and fast action characteristics.

[0013] Optionally, the outer end of the plug two is provided with a stationary contact, and the stationary contact is made by stamping.

[0014] By adopting the above technical scheme, the stationary contact is used for connecting the circuit.

[0015] Optionally, the inner end of the bimetallic sheet is provided with a fixed sheet two, the fixed sheet two is connected with the fixed sheet one, and the fixed sheet two and the fixed sheet one are connected by bolts.

[0016] By adopting the above technical scheme, the fixed sheet two and the fixed sheet one are connected, and are used for connecting the bimetallic sheet and the plug one.

[0017] Optionally, the moving contact is subjected to silver plating treatment, and the moving contact is made of silver tin oxide material and has excellent conductivity and wear resistance.

[0018] By adopting the above technical scheme, the moving contact is used for connecting the stationary contact, so that the circuit connection is realized.

[0019] Optionally, the stationary contact is subjected to silver plating treatment, and the stationary contact is made of silver tin oxide material and has excellent conductivity and wear resistance.

[0020] By adopting the above technical scheme, the stationary contact is used for connecting the moving contact, so that the circuit connection is realized.

[0021] Beneficial effects: the bimetallic sheet and the heating strip are installed in the precision installation chamber, the bimetallic sheet generates heat when overloaded, thereby deforming to disconnect the circuit, realizing current temperature protection, the heating strip generates heat when overloaded, accelerating the heating deformation of the bimetallic sheet, thereby improving the response speed, and the problem that the bimetallic sheet cannot be disconnected due to insufficient heating amount can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is the overall structure diagram of the embodiment of the utility model;

[0023] Fig. 2 is the plug two structure diagram of the embodiment of the utility model;

[0024] Fig. 3 is the plug one structure diagram of the embodiment of the utility model;

[0025] Fig. 4 is the bimetallic strip structure diagram of the embodiment of the utility model;

[0026] Fig. 5 is the circuit connection protection structure diagram of the embodiment of the utility model;

[0027] Mark explanation: 1, shell, 2, plug one, 3, plug two, 4, fixed seat, 5, bimetallic strip, 6, stationary contact, 7, fixed sheet one, 8, precision mounting chamber, 9, moving contact, 10, fixed sheet two, 11, heating bar. DETAILED DESCRIPTION

[0028] In order to make the technical scheme of the application clearer, the application is further described in detail below in combination with the drawings and specific embodiments, such as Figs. 1 to 5 , including shell 1, bimetallic strip 5, heating device 11, contact mechanism and external connection end; The precision mounting chamber 8 is arranged in the shell 1; The bimetallic strip 5 and the heating bar 11 are located in the precision mounting chamber 8, and the heating bar 11 is thermally coupled with the bimetallic strip 5; The contact mechanism includes the moving contact 9 and the stationary contact 6, and the moving contact 9 is mechanically linked with the bimetallic strip 5; The external connection end is connected with the moving contact 9 and the stationary contact 6 and extends to the outside of the shell 1, the bimetallic strip 5 and the heating bar 11 are installed in the precision mounting chamber 8, the bimetallic strip 5 generates heat when overloaded, thereby deforming, so that the circuit is disconnected, realizing current temperature protection, the heating bar 11 arranged generates heat when overloaded, accelerates the heating deformation of the bimetallic strip 5, thereby improving the response speed, and the problem that the bimetallic strip 5 cannot be disconnected due to insufficient heat can be avoided.

[0029] The heating bar 11 is a precision resistance wire, which is uniformly wound on a high-temperature-resistant support, and the support is installed on the inner side of the precision mounting chamber 8; The resistance bar 11 generates heat and is used for heating the bimetallic strip.

[0030] The fixed seat 4 is installed at the outer end of the shell 1, plug one 2 and plug two 3 are fixedly installed at both ends of the fixed seat 4 respectively, and plug one 2 and plug two 3 are used for connecting both ends of the circuit.

[0031] The fixed sheet one 7 is arranged at the inner end of plug one 2, the bimetallic strip 5 is fixedly installed at the outer end of the fixed sheet one 7, the moving contact 9 is arranged at the inner end of the bimetallic strip 5, and the bimetallic strip 5 is of a fast response type, has high sensitivity and fast action characteristics.

[0032] The stationary contact 6 is arranged at the outer end of plug two 3, and the stationary contact 6 is used for connecting the circuit.

[0033] The fixed sheet two 10 is arranged at the inner end of the bimetallic strip 5, the fixed sheet two 10 is connected with the fixed sheet one 7, the fixed sheet two 10 and the fixed sheet one 7 are connected, and are used for connecting the bimetallic strip 5 and plug one 2.

[0034] The mobile contact 9 is silver-plated, and is used to connect with the stationary contact 6 to realize circuit connection.

[0035] The stationary contact 6 is silver-plated, and is used to connect with the mobile contact 9 to realize circuit connection.

[0036] The implementation principle of the small current temperature protector according to the embodiment of the application is as follows: when the small current temperature protector is used, it is usually in a connected state, the stationary contact 6 and the mobile contact 9 are connected together, and the circuit is in a connected state; when the current is too large, the bimetallic strip 5 generates heat, the bimetallic strip starts to deform, the controller controls the heating strip 11 to work, the deformation of the bimetallic strip 5 is accelerated, the circuit is accelerated to be disconnected, and circuit protection is realized.

[0037] The above-described embodiments only express several embodiments of the application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A compact current temperature protector characterized by: It includes a shell (1), a bimetallic strip (5), a heating device (11), a contact mechanism and an external connecting end; the shell (1) is internally provided with a precision mounting chamber (8); the bimetallic strip (5) and the heating strip (11) are located in the precision mounting chamber (8), the heating strip (11) is thermally coupled with the bimetallic strip (5); the contact mechanism includes a moving contact (9) and a stationary contact (6), the moving contact (9) is mechanically linked with the bimetallic strip (5); the external connecting end is connected with the moving contact (9) and the stationary contact (6) and extends to the outside of the shell (1).

2. A small current temperature protector according to claim 1, characterized in that: The heating strip (11) is a precision resistance wire, which is uniformly wound on a high-temperature resistant support, and the support is mounted on the inside of the precision mounting chamber (8).

3. A small current temperature protector according to claim 1, wherein: The shell (1) is externally provided with a fixed seat (4), the fixed seat (4) is respectively externally provided with a plug one (2) and a plug two (3).

4. A small current temperature protector according to claim 3, wherein: The plug one (2) is internally provided with a fixed sheet one (7), the fixed sheet one (7) is externally provided with the bimetallic strip (5), and the bimetallic strip (5) is internally provided with the moving contact (9).

5. A small current temperature protector according to claim 3, wherein: The plug two (3) is externally provided with the stationary contact (6).

6. A small current temperature protector according to claim 4, wherein: The bimetallic strip (5) is internally provided with a fixed sheet two (10), and the fixed sheet two (10) is connected with the fixed sheet one (7).

7. A small current temperature protector according to claim 1, wherein: The moving contact (9) is subjected to silver plating treatment.

8. A small current temperature protector according to claim 1, wherein: The stationary contact (6) is subjected to silver plating treatment.

Images