CN220359376U - Heater control circuit - Google Patents
Heater control circuit Download PDFInfo
- Publication number
- CN220359376U CN220359376U CN202321736726.2U CN202321736726U CN220359376U CN 220359376 U CN220359376 U CN 220359376U CN 202321736726 U CN202321736726 U CN 202321736726U CN 220359376 U CN220359376 U CN 220359376U
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- Prior art keywords
- heating
- control circuit
- controller
- heater control
- heater
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- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 239000007787 solid Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- Control Of Resistance Heating (AREA)
Abstract
The utility model belongs to the technical field of control circuits, and discloses a heater control circuit which comprises a plurality of heating channels arranged in parallel, wherein the heating channels are connected with a controller, and each heating channel comprises an earth leakage circuit breaker, a contactor, a relay and a heater which are sequentially connected; and each heating channel is integrated with a current transformer, and the current transformers are connected with the controller. The heater control circuit provided by the utility model has multiple protection functions, and even if a single heating channel fails, the normal operation of the heaters of other heating channels is not affected; the heating channel is also integrated with a current transformer, so that the power consumption and the electricity consumption of the heater can be counted in real time.
Description
Technical Field
The utility model belongs to the technical field of control circuits, and particularly relates to a heater control circuit.
Background
In the application field of heating, a lot of non-clean energy sources such as coal, particles, fuel gas and the like still exist at present; with the trend of development of complete electrification of an electric network, in many products adopting electric heating, a simple direct rough control mode is adopted mostly, and a heater control circuit shown in fig. 1 is simple in structure, but poor in safety and reliability, cannot reliably work in places with high safety and reliability requirements, and equipment is completely paralyzed only if a fault exists.
The above description of the background is only for the purpose of facilitating a thorough understanding of the present utility model's aspects (in terms of the means of technology used, the technical problems solved, and the technical effects produced, etc.) and should not be taken as an acknowledgement or any form of suggestion that this message constitutes prior art that is already known to a person skilled in the art.
Disclosure of Invention
The present utility model aims to solve the above technical problems at least to some extent. To this end, the present utility model aims to provide a safe and reliable heater control circuit.
The technical scheme adopted by the utility model is as follows:
a heater control circuit comprises a plurality of heating channels which are arranged in parallel, wherein the heating channels are connected with a controller, and each heating channel comprises an electric leakage circuit breaker, a contactor, a relay and a heater which are sequentially connected; and each heating channel is integrated with a current transformer, and the current transformers are connected with the controller.
Preferably, the controller is connected with a power supply channel, the power supply channel comprises an electric leakage breaker and an AC-DC power supply which are connected, the power supply channel is integrated with a current transformer, and the current transformer is connected with the controller.
Preferably, the controller is also connected to a temperature sensor.
Preferably, the relay is a solid state relay.
The beneficial effects of the utility model are as follows:
the heater control circuit provided by the utility model has the function of re-protection, even if a single heating channel fails, the normal operation of the heaters of other heating channels is not influenced, and under the occasion with higher reliability requirements, the stable operation of equipment can be ensured by adopting the multi-channel redundancy design of the scheme; the heating channel is also integrated with a current transformer, so that the power consumption and the electricity consumption of the heater can be counted in real time.
Drawings
Fig. 1 is a schematic diagram of a prior art heater control circuit.
Fig. 2 is a schematic diagram of a heater control circuit of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should also be appreciated that in the embodiments, the functions/acts may occur in a different order than the figures. For example, two figures shown in succession may in fact be executed substantially concurrently or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
As shown in fig. 2, a heater control circuit of the present embodiment includes a plurality of heating channels arranged in parallel, each of the plurality of heating channels being connected to a controller, each of the plurality of heating channels including an earth leakage breaker, a contactor, a relay, and a heater connected in sequence; the heater control circuit forms a heating redundancy design circuit through a plurality of heating channels, so that the heater control circuit is safe and reliable; even if any one heating channel fails, the heaters of the rest heating channels can work normally. Specifically, any heating channel leaks electricity, and the corresponding leakage circuit breaker can be rapidly disconnected, so that the work of other heating channels is not influenced. As shown in fig. 2, one of the heating paths includes a first contactor K1, a first leakage breaker S1, a first relay Y1, and a first heater R1.
Each heating channel is integrated with a current transformer, and the current transformers are connected with the controller and can monitor the working current of each heating channel in real time; the controller integrates multi-channel low-side driving output and is used for controlling the contactor and the relay; when the current transformer monitors that the working current of any heating channel exceeds the maximum set current, the corresponding relay is disconnected; after the relay is disconnected, if the relay is still not functional, the controller judges that the relay is in fault and directly disconnects the contactor to realize the protection function.
Because the relay has contacts, the frequency of the switch is high and is easy to damage, and the relays in the heating channels are all solid state relays.
The heating channel is integrated with a first current transformer CT1. The controller is connected with a power supply channel, the power supply channel comprises a zero leakage circuit breaker S0 and an AC-DC power supply which are connected, the power supply channel is integrated with a zero current transformer CT0, and the zero current transformer CT0 is connected with the controller; the controller is also integrated with a temperature sensor RT1, and has the function of a temperature controller; meanwhile, as each heating channel is integrated with a current transformer, the power consumption of the heater can be counted, so that the electric meter has the function of an electric meter.
The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.
Claims (4)
1. A heater control circuit, characterized by: the electric leakage circuit breaker comprises a plurality of heating channels which are arranged in parallel, wherein the plurality of heating channels are connected with a controller, and each heating channel comprises an electric leakage circuit breaker, a contactor, a relay and a heater which are sequentially connected; and each heating channel is integrated with a current transformer, and the current transformers are connected with the controller.
2. The heater control circuit of claim 1, wherein: the controller is connected with a power supply channel, the power supply channel comprises a leakage circuit breaker and an AC-DC power supply which are connected, the power supply channel is integrated with a current transformer, and the current transformer is connected with the controller.
3. The heater control circuit of claim 1, wherein: the controller is also connected with a temperature sensor.
4. The heater control circuit of claim 1, wherein: the relay adopts a solid state relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321736726.2U CN220359376U (en) | 2023-07-04 | 2023-07-04 | Heater control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321736726.2U CN220359376U (en) | 2023-07-04 | 2023-07-04 | Heater control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220359376U true CN220359376U (en) | 2024-01-16 |
Family
ID=89477083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321736726.2U Active CN220359376U (en) | 2023-07-04 | 2023-07-04 | Heater control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220359376U (en) |
-
2023
- 2023-07-04 CN CN202321736726.2U patent/CN220359376U/en active Active
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