A small intelligent circuit breaker

Abstract

The present invention discloses a small intelligent circuit breaker, comprising a housing, two wiring terminals installed at both ends of the length of the housing, and a moving contact, a static contact, an electronic release, and a lock release mechanism installed in the housing; the moving contact and the static contact, and the electronic release and the lock release mechanism are respectively installed in matching positions; the two wiring terminals are electrically connected to the moving contact and the static contact respectively; the moving contact is linked to the lock release mechanism; the housing is also equipped with a Hall sensor and a bimetallic strip, the Hall sensor and the bimetallic strip are connected in the electrical connection path between one of the wiring terminals and the corresponding contact, the output of the Hall sensor controls the electronic release through the electric control component installed in the housing, and the bimetallic strip cooperates with the lock release mechanism. The present invention uses the Hall sensor and the bimetallic strip to realize electronic and mechanical dual overload protection.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a small intelligent circuit breaker with a reclosing function and a length dimension of the circuit breaker within 90 mm. Background Art

[0002] A circuit breaker is a switch device that can close, carry and break the current under normal circuit conditions and can close, carry and break the current under abnormal circuit conditions within a specified time. An intelligent circuit breaker is a type of circuit breaker. The intelligent circuit breaker of the prior art collects current through a current transformer, receives the current signal collected by the current transformer through a microprocessor, compares the collected current signal with the set value, and then issues an instruction to cause the electronic release to drive the mechanism to trip, so as to achieve multiple protections such as overload, over-voltage and under-voltage of the intelligent circuit breaker, among which overload is especially realized by electronic overload protection. Since this type of intelligent circuit breaker of the prior art uses a current transformer to collect current signals, because the current transformer is large in size, the appearance of the intelligent circuit breaker product is relatively large. For small intelligent circuit breaker products, when a current transformer is installed, the mechanical overload protection function with a bimetallic strip is often sacrificed. That is to say, there is no space in the shell of the small intelligent circuit breaker to install the bimetallic strip. In order to achieve dual overload protection of electronics and machinery, one method of the prior art is to achieve mechanical overload protection by increasing the length of the circuit breaker. However, for small intelligent circuit breaker products with a length of less than 90 mm, it is impossible to increase the length of the circuit breaker. Usually, mechanical overload protection is achieved by adding an external module. However, the addition of an external module will inevitably increase the structural complexity of the product, increase the difficulty of product installation, and affect the use effect of the product. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a small intelligent circuit breaker which, through structural improvement, can achieve dual overload protection of electronics and machinery while maintaining the miniaturization of the product, and has the characteristics of simple structure, easy assembly and good use effect.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a small intelligent circuit breaker comprises a shell, two wiring terminals installed at both ends of the length of the shell, and a moving contact, a static contact, an electronic release and a lock release mechanism installed in the shell; the moving contact and the static contact, and the electronic release and the lock release mechanism are respectively installed at matching positions; the two wiring terminals are electrically connected with the moving contact and the static contact respectively; the moving contact is linked with the lock release mechanism; a Hall sensor and a bimetallic strip are also installed in the shell at the same time, the Hall sensor and the bimetallic strip are connected in the electrical connection path between one of the wiring terminals and the corresponding contact, the output of the Hall sensor controls the electronic release through the electric control component installed in the shell, and the bimetallic strip cooperates with the lock release mechanism, so as to realize the electronic and mechanical dual overload protection by using the Hall sensor and the bimetallic strip.

[0005] The Hall sensor and the bimetallic strip are connected in an electrical connection path between the outlet terminal and the moving contact.

[0006] The Hall sensor and the bimetal strip are installed on one side of the length of the shell close to the outlet terminal, with the Hall sensor at the bottom and the bimetal strip at the top. The Hall sensor and the bimetal strip are sequentially connected in the electrical connection path from the outlet terminal to the moving contact; the length of the shell is not more than 90 mm.

[0007] The electric control component is installed at the bottom of the housing and corresponds to the bottom of the Hall sensor.

[0008] The Hall sensor comprises a magnetic ring and a Hall element arranged in the magnetic ring. The output of the Hall element is connected to the MCU in the electric control component. The output of the MCU is connected to the electronic release to realize the control of the electronic release.

[0009] The axis of the magnetic ring of the Hall sensor is arranged along the thickness direction of the shell, and the outlet terminal is inserted into the middle of the magnetic ring.

[0010] The Hall element is located at the bottom of the magnetic ring.

[0011] The outlet terminal includes a first horizontal section for connecting an external circuit, a first vertical section formed by bending the inner end of the first horizontal section downward, a second horizontal section formed by bending the bottom end of the first vertical section horizontally, and a second vertical section formed by bending the rear end of the second horizontal section upward; the second horizontal section of the outlet terminal is inserted into the middle of the magnetic ring; the top of the second vertical section is electrically connected to the bimetallic strip.

[0012] The inner section of the first horizontal section of the outlet terminal is also equipped with a first temperature sensor, and the output of the first temperature sensor is connected to the MCU in the electric control component.

[0013] The static contact is connected to another wiring terminal serving as an incoming terminal, and the electronic release is connected in the electrical connection path from the incoming terminal to the static contact; the incoming terminal comprises a first horizontal section for connecting an external circuit, a first vertical section formed by bending upward the inner end of the first horizontal section, and a second horizontal section formed by bending horizontally the top end of the first vertical section, the second horizontal section of the incoming terminal is also provided with a second temperature sensor, and the output of the second temperature sensor is connected to the MCU in the electric control component.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The present invention adopts a method that a Hall sensor and a bimetallic strip are installed in the housing at the same time, and the Hall sensor and the bimetallic strip are connected in the electrical connection path between one of the wiring terminals and the corresponding contact. The output of the Hall sensor controls the electronic release through the electric control component installed in the housing, and the bimetallic strip cooperates with the lock release mechanism, so that the Hall sensor and the bimetallic strip are used to achieve electronic and mechanical dual overload protection. The present invention utilizes the small size of the Hall sensor, so that the bimetallic strip has installation space, and realizes that in a standard 90mm circuit breaker, the Hall sensor can be used for current sampling to achieve electronic overload protection of the circuit breaker, and space for installation and movement radius can be vacated for the bimetallic strip to achieve mechanical overload protection of the circuit breaker, and it has the characteristics of simple structure, easy assembly and good use effect.

[0016] 2. Since the present invention adopts the method of installing a first temperature sensor at the outgoing terminal and a second temperature sensor at the incoming terminal, the first temperature sensor and the second temperature sensor can be used to monitor the temperature of the two connecting terminals, thereby ensuring the normal use of the circuit breaker.

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the small intelligent circuit breaker of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a three-dimensional shape of an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the three-dimensional structure of an embodiment of the present invention (without the front shell);

[0021] Figure 4 is a front view of an embodiment of the present invention (without the front housing);

[0022] Figure 5 is a schematic diagram of the coordination between the outlet terminal and the Hall sensor of an embodiment of the present invention;

[0023] Figure 6 It is a front view of the output terminal and the Hall sensor in cooperation with each other in an embodiment of the present invention (including the electric control components);

[0024] Figure 7 is a bottom view of the output terminal and the Hall sensor in cooperation with each other according to an embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of the electrical coordination between the output terminal and the Hall sensor according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] Example

[0027] See also Figures 1 to 8 As shown, a small intelligent circuit breaker of the present invention comprises a housing 1, two wiring terminals 2 installed at both ends of the length of the housing, and a moving contact 31, a stationary contact 32, an electronic trip device 4 and a lock release mechanism 5 installed in the housing; the housing 1 is composed of a front housing 11 and a rear housing 12, and the front housing 11 and the rear housing 12 are fixed together to form a cavity for installing the moving contact 31, the stationary contact 32, the electronic trip device 4 and the lock release mechanism 5; the moving contact 31 and the stationary contact 32 are installed at matching positions, and the electronic trip device 4 and the lock release mechanism 5 are also installed at matching positions; the two wiring terminals 2 are installed at both ends of the length of the housing, and a moving contact 31, a stationary contact 32, an electronic trip device 4 and a lock release mechanism 5 are installed in the housing ... moving contact 31 and the stationary contact 32 are installed at matching positions, and the electronic trip device 4 and the lock release mechanism 5 are also installed in matching positions; the two wiring terminals 2 are installed at both ends of the length of the housing, and the moving contact 31, the stationary contact 32, the electronic trip device 4 and the lock release mechanism 5 are installed in the housing; the moving contact 31 and the stationary contact 32 are installed at matching positions, and the electronic trip device 4 and the lock release mechanism 5 are installed in the housing; the moving contact 31 and the stationary contact 32 are installed at matching positions, and the moving contact 31 and the stationary contact 32 are installed in the housing; the moving contact 31 and the stationary contact 31 are installed at matching positions, and the electronic trip device 4 and the lock release mechanism 5 are installed in the housing; the moving contact 31 and The terminal 2 is electrically connected to the moving contact 31 and the stationary contact 32 respectively; the moving contact 31 is linked to the lock tripping mechanism 5; the housing 1 is also provided with a Hall sensor 6 and a bimetallic strip 7, the Hall sensor 6 and the bimetallic strip 7 are connected in the electrical connection path between one of the wiring terminals 21 and the corresponding contact, the output of the Hall sensor 6 controls the electronic release 4 through the electric control component 8 installed in the housing, the bimetallic strip 7 cooperates with the lock tripping mechanism 5, so as to realize the electronic and mechanical dual overload protection by using the Hall sensor 6 and the bimetallic strip 7.

[0028] In this embodiment, the Hall sensor 6 and the bimetal strip 7 are connected in the electrical connection path between the outlet terminal 21 and the moving contact 31 .

[0029] In this embodiment, the Hall sensor 6 and the bimetal strip 7 are installed on one side of the length of the shell 1 close to the outlet terminal 21, and the Hall sensor 6 is at the lower part and the bimetal strip 7 is at the upper part. The Hall sensor 6 and the bimetal strip 7 are sequentially connected in the electrical connection path from the outlet terminal 21 to the moving contact 31; the length dimension of the shell 1 is 90 mm.

[0030] The limitations of the upper and lower directions in the present invention only indicate the relative positional relationship between components or structures in the components, and the length of the housing refers to the dimension from the inlet to the outlet of the single-pole circuit breaker.

[0031] This embodiment is a single-pole circuit breaker, and can also be applied to a multi-pole circuit breaker.

[0032] In this embodiment, the electronic control component 8 is installed at the bottom of the housing 1 and corresponds to the bottom of the Hall sensor 6 .

[0033] In this embodiment, the Hall sensor 6 includes a magnetic ring 61 and a Hall element 62 arranged in the magnetic ring. The output of the Hall element 62 is connected to the MCU in the electronic control component 8, and the output of the MCU is connected to the electronic release 4 to control the electronic release 4.

[0034] In this embodiment, the axis of the magnetic ring 61 of the Hall sensor 6 is arranged along the thickness direction of the housing 1 , and the outlet terminal 21 is inserted into the middle of the magnetic ring 61 .

[0035] In this embodiment, the Hall element 62 is located at the bottom of the magnetic ring 61 .

[0036] In this embodiment, the outlet terminal 21 includes a first horizontal section 211 for connecting an external circuit, a first vertical section 212 formed by bending the inner end of the first horizontal section downward, a second horizontal section 213 formed by bending the bottom end of the first vertical section horizontally, and a second vertical section 214 formed by bending the rear end of the second horizontal section upward; the second horizontal section 213 of the outlet terminal 21 is inserted into the middle of the magnetic ring 61; the top of the second vertical section 214 is electrically connected to the bimetallic strip 7.

[0037] In this embodiment, a first temperature sensor 91 is further installed inside the first horizontal section 211 of the outlet terminal 21 , and the output of the first temperature sensor 91 is connected to the MCU in the electric control component 8 .

[0038] In this embodiment, the static contact 32 is connected to another wiring terminal serving as the incoming terminal 22, and the electronic release 4 is connected in the electrical connection path from the incoming terminal 22 to the static contact 32; the incoming terminal 22 includes a first horizontal section 221 for connecting an external line, a first vertical section 222 formed by bending upward the inner end of the first horizontal section, and a second horizontal section 223 formed by bending horizontally the top end of the first vertical section, and the second horizontal section 223 of the incoming terminal 22 is also equipped with a second temperature sensor 92, and the output of the second temperature sensor 92 is connected to the MCU in the electronic control component 8.

[0039] In this embodiment, the circuit breaker also includes a handle 93 and an arc extinguishing chamber 94. The handle 93 is installed in the middle of the top of the shell 1. The handle 93 is connected to the lock release mechanism 5 through a connecting rod 95. The arc extinguishing chamber 94 is installed in the shell 1 and is located below the electronic release 4.

[0040] A small intelligent circuit breaker of the present invention adopts a Hall sensor 6 and a bimetallic strip 7 installed in a housing 1 at the same time, and the Hall sensor 6 and the bimetallic strip 7 are connected in the electrical connection path between one of the wiring terminals 21 and the corresponding contact 31, the output of the Hall sensor 6 controls the electronic release 4 through the electric control component 8 installed in the housing 1, and the bimetallic strip 7 cooperates with the lock release mechanism 5, so as to realize the electronic and mechanical dual overload protection by using the Hall sensor 6 and the bimetallic strip 7. The present invention utilizes the small size of the Hall sensor 6, so that the bimetallic strip 7 has an installation space, and realizes that in a standard 90mm circuit breaker, the Hall sensor 6 can be used for current sampling to realize the electronic overload protection of the circuit breaker, and the installation and movement radius space of the bimetallic strip 7 can be vacated to realize the mechanical overload protection of the circuit breaker, and has the characteristics of simple structure, easy assembly and good use effect.

[0041] A small intelligent circuit breaker of the present invention adopts a first temperature sensor 91 installed on the outlet terminal 21 and a second temperature sensor 92 installed on the input terminal 22. The first temperature sensor 91 and the second temperature sensor 92 can be used to monitor the temperature of the two terminals 2, thereby ensuring the normal use of the circuit breaker.

[0042] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A small intelligent circuit breaker, comprising a housing, two wiring terminals installed at both ends of the length of the housing, and a moving contact, a static contact, an electronic trip device and a lock trip mechanism installed in the housing; the moving contact and the static contact, and the electronic trip device and the lock trip mechanism are respectively installed at matching positions; the two wiring terminals are respectively electrically connected to the moving contact and the static contact; the moving contact is linked to the lock trip mechanism; Features: A Hall sensor and a bimetallic strip are also installed in the shell. The Hall sensor and the bimetallic strip are connected in an electrical connection path between one of the wiring terminals and the corresponding contact. The output of the Hall sensor controls the electronic release through an electric control component installed in the shell. The bimetallic strip cooperates with the lock release mechanism, thereby utilizing the Hall sensor and the bimetallic strip to achieve dual electronic and mechanical overload protection.

2. The small intelligent circuit breaker according to claim 1, Features: The Hall sensor and the bimetallic strip are connected in an electrical connection path between the outlet terminal and the moving contact.

3. The small intelligent circuit breaker according to claim 2, Features: The Hall sensor and the bimetal strip are installed on one side of the length of the shell close to the outlet terminal, with the Hall sensor at the bottom and the bimetal strip at the top. The Hall sensor and the bimetal strip are sequentially connected in the electrical connection path from the outlet terminal to the moving contact; the length of the shell is not more than 90 mm.

4. The small intelligent circuit breaker according to claim 3, Features: The electric control component is installed at the bottom of the housing and corresponds to the bottom of the Hall sensor.

5. The small intelligent circuit breaker according to claim 3, Features: The Hall sensor comprises a magnetic ring and a Hall element arranged in the magnetic ring. The output of the Hall element is connected to the MCU in the electric control component. The output of the MCU is connected to the electronic release to realize the control of the electronic release.

6. The small intelligent circuit breaker according to claim 5, Features: The axis of the magnetic ring of the Hall sensor is arranged along the thickness direction of the shell, and the outlet terminal is inserted into the middle of the magnetic ring.

7. The small intelligent circuit breaker according to claim 6, Features: The Hall element is located at the bottom of the magnetic ring.

8. The small intelligent circuit breaker according to claim 6, Features: The outlet terminal includes a first horizontal section for connecting an external circuit, a first vertical section formed by bending the inner end of the first horizontal section downward, a second horizontal section formed by bending the bottom end of the first vertical section horizontally, and a second vertical section formed by bending the rear end of the second horizontal section upward; the second horizontal section of the outlet terminal is inserted into the middle of the magnetic ring; the top of the second vertical section is electrically connected to the bimetallic strip.

9. The small intelligent circuit breaker according to claim 8, Features: The inner section of the first horizontal section of the outlet terminal is also equipped with a first temperature sensor, and the output of the first temperature sensor is connected to the MCU in the electric control component.

10. The small intelligent circuit breaker according to claim 2, Features: The static contact is connected to another wiring terminal serving as an incoming terminal, and the electronic release is connected in the electrical connection path from the incoming terminal to the static contact; the incoming terminal comprises a first horizontal section for connecting an external circuit, a first vertical section formed by bending upward the inner end of the first horizontal section, and a second horizontal section formed by bending horizontally the top end of the first vertical section, the second horizontal section of the incoming terminal is also provided with a second temperature sensor, and the output of the second temperature sensor is connected to the MCU in the electric control component.

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