CN216486159U - Temperature control relay protection circuit - Google Patents
Temperature control relay protection circuit Download PDFInfo
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- CN216486159U CN216486159U CN202123239753.2U CN202123239753U CN216486159U CN 216486159 U CN216486159 U CN 216486159U CN 202123239753 U CN202123239753 U CN 202123239753U CN 216486159 U CN216486159 U CN 216486159U
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Abstract
The utility model discloses a control by temperature change relay protection circuit, include: a temperature switch circuit, a first relay circuit and a second relay circuit; wherein, the outside first power is connected to temperature switch circuit's one end, and first relay circuit's first end is connected to temperature switch circuit's the other end, and the one end of second relay circuit is connected to first relay circuit second end, and first power is connected to first relay circuit third end, and the fourth end of first relay is connected ground, and the other end of second relay circuit is connected and is treated the protection circuit. Through implementing the utility model discloses, realized avoiding using more components and parts and control chip to the function of circuit temperature protection, optimized protection circuit's structure, reduced the use of device, reduced the cost of product.
Description
Technical Field
The utility model relates to a circuit protection field, concretely relates to control by temperature change relay protection circuit.
Background
The temperature control circuit is a common temperature control device in daily life, and the temperature control circuit is arranged in a water heater, an electric cooker, an induction cooker and an electric kettle, and plays an extremely important role in industrial production. At present, temperature control circuits in the market detect temperature through circuits such as an operational amplifier and the like, then transmit signals to a chip, and the chip controls a relay to be disconnected, so that the structure is complex, and the hardware cost is very high.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a control by temperature change relay protection circuit to solve the disconnection and the closure that the control by temperature change circuit used chip control relay in the prior art, made the structure of circuit complicated, the very high technical problem of hardware cost.
The utility model provides a technical scheme as follows:
an embodiment of the utility model provides a control by temperature change relay protection circuit, include: a temperature switch circuit, a first relay circuit and a second relay circuit; the protection circuit comprises a temperature switch circuit, a first relay circuit, a second relay circuit, a third relay circuit, a fourth relay circuit and a protection circuit, wherein one end of the temperature switch circuit is connected with an external first power supply, the other end of the temperature switch circuit is connected with the first end of the first relay circuit, the second end of the first relay circuit is connected with one end of the second relay circuit, the third end of the first relay circuit is connected with the first power supply, the fourth end of the first relay is connected with the ground, and the other end of the second relay circuit is connected with the protection circuit to be protected.
In combination with the embodiment of the present invention, in a first embodiment, the first relay circuit includes: double pole double gate relay.
Combine the utility model discloses embodiment first embodiment, in the second embodiment, temperature control relay protection circuit still includes: an alarm circuit; the alarm circuit is connected with the fifth end of the first relay circuit.
In combination with the second embodiment of the present invention, in a third embodiment, the double-pole double-gate relay includes: the first contact is connected with the alarm circuit, and the second contact is connected with the second relay circuit.
In combination with the embodiment of the present invention, in a fourth embodiment, the temperature switch circuit includes: and (6) a temperature switch.
In combination with the embodiment of the present invention, in a fifth embodiment, the second relay circuit includes: a second relay; the second relay includes: and the third contact is connected with a circuit to be protected.
In combination with the third embodiment of the present invention, in a sixth embodiment, the alarm circuit includes: the alarm, the triode and the first resistor; one end of the alarm is connected with an external second power supply; the other end of the alarm is connected with the collector of the triode and one end of the first resistor, and the other end of the first resistor is connected with the base of the triode and the second contact of the double-pole double-gate relay.
Combine the embodiment of the utility model provides a, in the seventh implementation mode, temperature control relay protection circuit still includes: clamping the circuit; one end of the clamping circuit is connected with the first end of the first relay circuit, and the other end of the clamping circuit is connected with the ground.
In combination with the seventh implementation manner of the embodiment of the present invention, in an eighth implementation manner, the clamping circuit includes: and a diode.
The utility model discloses technical scheme has following advantage:
the utility model provides a temperature control relay protection circuit, through setting up temperature switch circuit, first relay circuit and second relay circuit; wherein, outside first power is connected to temperature switch circuit's one end, and first relay circuit's first end is connected to temperature switch circuit's the other end, and the one end of second relay circuit is connected to first relay circuit's second end, and first power is connected to first relay circuit's third end, and the fourth end of first relay is connected ground, and the other end of second relay circuit is connected and is treated the protection circuit. The embodiment of the utility model provides an in just realize the function of temperature protection through temperature switch circuit, first relay circuit and second relay circuit, avoid using more components and parts and control chip, optimized protection circuit's structure, reduce the use of device, reduced the cost of product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a protection circuit of a temperature control relay according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a specific structure of a protection circuit of a temperature control relay according to an embodiment of the present invention;
fig. 3 is a specific circuit structure diagram of the protection circuit of the temperature control relay in the embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
An embodiment of the utility model provides a control by temperature change relay protection circuit, as shown in fig. 1, include: a temperature switch circuit 101, a first relay circuit 102, and a second relay circuit 103; one end of the temperature switch circuit 101 is connected with an external first power supply, the other end of the temperature switch circuit 101 is connected with a first end of the first relay circuit 102, a second end of the first relay circuit 102 is connected with one end of the second relay circuit 103, a third end of the first relay circuit 102 is connected with the first power supply, a fourth end of the first relay circuit 102 is connected with the ground, and the other end of the second relay circuit 103 is connected with a circuit to be protected.
The temperature switch circuit 101 in this embodiment can be set as a temperature threshold protection circuit, a temperature threshold is set according to components selected by the temperature switch circuit 101, when the temperature in the circuit is less than the temperature threshold, the temperature switch circuit 101 is in an off state, the first relay circuit 102 is turned on, the second relay circuit 103 is powered, the second relay circuit 103 is closed with a contact connected with the circuit to be protected, so that the circuit to be protected works normally, when the temperature in the circuit is greater than the temperature threshold, the temperature switch is in an on state, the first relay circuit 102 is disconnected with the second relay, so that the second relay is disconnected, and meanwhile, the circuit to be protected is disconnected. The protection circuit of the temperature controlled relay provided by the embodiment is used for preventing the main circuit in the power supply from being damaged due to overhigh temperature. In practice, the circuit to be protected is not limited to this, and may be a circuit that is damaged due to an excessive temperature in the circuit.
The utility model provides a temperature control relay protection circuit, through setting up temperature switch circuit, first relay circuit and second relay circuit; wherein, outside first power is connected to temperature switch circuit's one end, and first relay circuit's first end is connected to temperature switch circuit's the other end, and the one end of second relay circuit is connected to first relay circuit's second end, and first power is connected to first relay circuit's third end, and the fourth end of first relay is connected ground, and the other end of second relay circuit is connected and is treated the protection circuit. The embodiment of the utility model provides an in just realize the function of temperature protection through temperature switch circuit, first relay circuit and second relay circuit, avoid using more components and parts and control chip, optimized protection circuit's structure, reduce the use of device, reduced the cost of product.
As shown in fig. 2, the first relay circuit 102 in the present embodiment includes: double pole double gate relay K1. The double-pole double-gate relay K1 comprises: a first contact and a second contact, wherein the first contact comprises: the first moving contact 3, the first normally open stationary contact 4 and the first normally closed stationary contact 2; the second contact includes: a second moving contact 6, a second normally open stationary contact 7 and a second normally closed stationary contact 5.
In the temperature-controlled relay protection circuit provided in this embodiment, the first moving contact 3 is a third end of the first relay circuit 102 and is connected to an external first power supply, the first normally-open stationary contact 4 corresponding to the first moving contact 3 is a first end of the first relay circuit 102, and the first normally-closed stationary contact 2 corresponding to the first contact is a second end of the first relay. In this embodiment, when the temperature in the circuit is lower than the temperature threshold, the temperature switch circuit 101 is in an open state, at this time, the first moving contact 3 of the double-pole double-gate relay K1 is connected to the first normally closed stationary contact 2, and the second relay circuit 103 is thus powered on and is in a closed state, so that the circuit to be protected normally operates. When the temperature in the circuit is greater than the temperature threshold, the temperature switch circuit 101 is in a closed state, the first moving contact 3 of the double-pole double-gate relay K1 is connected with the first normally-open stationary contact 4, the second end of the first relay circuit 102 is disconnected, and the second relay circuit 103 is in a disconnected state, so that the to-be-protected circuit is disconnected.
As shown in fig. 2, the temperature-controlled relay protection circuit further includes: an alarm circuit 104; the alarm circuit 104 is connected to the fifth terminal of the first relay circuit 102. The alarm circuit 104 is connected with the second moving contact 6 of the double-pole double-gate relay, and when the temperature in the circuit is smaller than the temperature threshold value, the alarm circuit 104 is not conducted; when the temperature in the circuit is greater than the temperature threshold, the alarm circuit 104 is turned on, thereby emitting an alarm signal.
As shown in fig. 2, the temperature switch circuit 101 includes: temperature switch RT 1. In the embodiment, the temperature switch circuit 101 uses the temperature switch RT1, the temperature switch RT1 is turned off when the temperature in the circuit is less than the temperature threshold, and the temperature switch RT1 is turned on when the temperature in the circuit is greater than the temperature threshold. The control of the circuit can be completed only by using the temperature switch, the circuit design is simple, and the hardware cost is low.
As shown in fig. 2, the second relay circuit 103 includes: a second relay K2; the second relay K2 includes: and a third contact 8, wherein the third contact 8 is connected with a circuit to be protected. The third contact 8 of the second relay K2 is a normally open contact, the third contact 8 is connected with a circuit to be protected, when the temperature is greater than the temperature threshold, the first movable contact in the double-pole double-gate relay K1 is connected with the first normally open stationary contact 4, the second relay circuit 103 is not conducted, the third contact 8 is disconnected, and therefore the circuit to be protected is also disconnected.
As shown in fig. 3, the alarm circuit 104 includes: the alarm B1, the triode Q1 and the first resistor R1; one end of the alarm B1 is connected with an external second power supply; the other end of the alarm B1 is connected with the collector of the triode Q1 and one end of the first resistor R1, and the other end of the first resistor R1 is connected with the base of the triode Q1 and the second contact 8 of the double-pole double-gate relay K1.
As shown in fig. 3, in this embodiment, the second contact 8 of the first relay is connected to the alarm circuit 104, wherein the second moving contact 6 is connected to the base of the transistor Q1, the second normally open fixed contact is connected to the emitter of the transistor Q1, and the second normally closed fixed contact 7 is left vacant. When the temperature is lower than the temperature threshold, the temperature switch circuit 101 is switched off, the second moving contact 6 in the first relay circuit 102 is connected with the second normally closed stationary contact 7, at this time, the triode Q1 in the alarm circuit 104 is not conducted due to the pull-up of the first resistor R1, and the alarm B1 does not send out an alarm signal. When the temperature is higher than the temperature threshold value, the temperature switch circuit 101 is conducted, the second moving contact 6 in the first relay circuit 102 is connected with the second normally-open static contact 5, the triode Q1 is pulled down, the voltage of the emitter of the triode Q1 and the voltage of the base of the triode Q1 form a differential pressure, so that the triode Q1 is conducted, and the alarm B1 sends an alarm signal.
As shown in fig. 2, the temperature-controlled relay protection circuit further includes: a clamp circuit 105; one end of the clamp circuit 105 is connected to a first end of the first relay circuit 102, and the other end of the clamp circuit 105 is connected to ground. Specifically, as shown in fig. 3, the clamping circuit 105 in the present embodiment uses a diode D1, and a diode D1 is used to clamp the high voltage generated when the first relay circuit 102 is turned off, and to protect the circuit from being damaged by the high voltage generated when the first relay circuit 102 is turned off.
As shown in fig. 3, a specific circuit diagram of the temperature-controlled relay protection circuit provided in this embodiment is shown, the temperature-controlled relay protection circuit adopts the following process, when the temperature in the circuit is less than the temperature threshold, the temperature switch RT1 is in an off state, the first moving contact 3 in the double-pole double-gate relay K1 is connected to the first normally closed stationary contact 2, at this time, the second relay K2 is powered on, so that the third contact 8 is closed, the circuit to be protected normally operates, the second moving contact 6 in the double-pole double-gate relay K1 is connected to the second normally closed stationary contact 7, because the second normally closed stationary contact 7 is idle, the triode Q1 in the alarm circuit 104 is pulled up due to the first resistor R1, the triode Q1 is not conducted, and the alarm B1 does not send an alarm signal. When the temperature is greater than the temperature threshold value in the circuit, temperature switch RT1 is the closure state, first moving contact 3 among the double-pole double-gate relay K1 connects first normally open stationary contact 4, second relay K2 does not conduct this moment, the disconnection of third contact 8, treat protection circuit stop work, second moving contact 6 among the double-pole double-gate relay K1 connects second normally open stationary contact 5, pull down triode Q1, triode Q1 emitter voltage and triode Q1 base voltage form the pressure differential, thereby triode Q1 switches on, alarm B1 sends alarm signal.
Although the present invention has been described in detail with respect to the exemplary embodiments and the advantages thereof, those skilled in the art will appreciate that various changes, substitutions and alterations can be made to the embodiments without departing from the spirit of the invention and the scope of the invention as defined by the appended claims. For other examples, one of ordinary skill in the art will readily appreciate that the order of the process steps may be varied while maintaining the scope of the present invention.
Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
Claims (9)
1. A temperature controlled relay protection circuit, comprising: a temperature switch circuit, a first relay circuit and a second relay circuit; the protection circuit comprises a temperature switch circuit, a first relay circuit, a second relay circuit, a third relay circuit, a fourth relay circuit and a protection circuit, wherein one end of the temperature switch circuit is connected with an external first power supply, the other end of the temperature switch circuit is connected with the first end of the first relay circuit, the second end of the first relay circuit is connected with one end of the second relay circuit, the third end of the first relay circuit is connected with the first power supply, the fourth end of the first relay is connected with the ground, and the other end of the second relay circuit is connected with the protection circuit to be protected.
2. The temperature controlled relay protection circuit of claim 1, wherein the first relay circuit comprises: double pole double gate relay.
3. The temperature controlled relay protection circuit of claim 2, further comprising: an alarm circuit; the alarm circuit is connected with the fifth end of the first relay circuit.
4. The temperature controlled relay protection circuit of claim 3, wherein the dual pole, dual gate relay comprises: the first contact is connected with the alarm circuit, and the second contact is connected with the second relay circuit.
5. The temperature controlled relay protection circuit of claim 1, wherein the temperature switching circuit comprises: and (6) a temperature switch.
6. The temperature controlled relay protection circuit of claim 1, wherein the second relay circuit comprises: a second relay; the second relay includes: and the third contact is connected with a circuit to be protected.
7. The temperature controlled relay protection circuit of claim 4, wherein the alarm circuit comprises: the alarm, the triode and the first resistor; one end of the alarm is connected with an external second power supply; the other end of the alarm is connected with the collector of the triode and one end of the first resistor, and the other end of the first resistor is connected with the base of the triode and the second contact of the double-pole double-gate relay.
8. The temperature controlled relay protection circuit of claim 1, further comprising: clamping the circuit; one end of the clamping circuit is connected with the first end of the first relay circuit, and the other end of the clamping circuit is connected with the ground.
9. The temperature controlled relay protection circuit of claim 8, wherein the clamp circuit comprises: and a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123239753.2U CN216486159U (en) | 2021-12-20 | 2021-12-20 | Temperature control relay protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123239753.2U CN216486159U (en) | 2021-12-20 | 2021-12-20 | Temperature control relay protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216486159U true CN216486159U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123239753.2U Active CN216486159U (en) | 2021-12-20 | 2021-12-20 | Temperature control relay protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216486159U (en) |
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2021
- 2021-12-20 CN CN202123239753.2U patent/CN216486159U/en active Active
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