CN219143332U

CN219143332U - Temperature control circuit

Info

Publication number: CN219143332U
Application number: CN202320255870.8U
Authority: CN
Inventors: 王家永; 王正良; 李晓云
Original assignee: Yangzhou Yongxu Electrical Equipment Co ltd
Current assignee: Yangzhou Yongxu Electrical Equipment Co ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-06-06
Anticipated expiration: 2033-02-17

Abstract

The utility model discloses a temperature control circuit which comprises a singlechip MCU, a temperature sensor, a fan, a power amplifier P, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a triode Q5. After the temperature in the electric cabinet reaches a preset value, the alarm alarms personnel, and the current of the output fan can be adjusted according to the specific temperature in the electric cabinet, so that the rotating speed of the fan is controlled; meanwhile, when the temperature in the electric cabinet is too high, electronic equipment in the electric cabinet can be protected, and the service life of the electric cabinet is prolonged.

Description

Temperature control circuit

Technical Field

The utility model relates to the field of control circuits, in particular to a temperature control circuit which can be applied to an electrical cabinet to regulate and control the temperature in the electrical cabinet.

Background

The electrical cabinet includes: the electrical control cabinet, the power distribution cabinet, the switch cabinet and the like are assembled in a closed or semi-closed metal cabinet or on a screen according to the electrical wiring requirements, the arrangement of the electrical control cabinet, the power distribution cabinet and the switch cabinet meets the requirements of normal operation of an electric power system, the electrical control cabinet, the power distribution cabinet and the switch cabinet are convenient to overhaul, and the safety of personnel and surrounding equipment is not endangered. The circuit can be switched on or off by means of a manual or automatic switch during normal operation. In case of failure or abnormal operation, the circuit is cut off or an alarm is given by means of a protective electric appliance. The measuring instrument can display various parameters in operation, and can also adjust certain electrical parameters to prompt or signal deviation from a normal working state.

At present, most of the existing electrical cabinets are closed, heat is generated in operation of electrical equipment installed in the existing electrical cabinets, and if the heat cannot be discharged, electrical components in the electrical control cabinets can be burnt out, so that dangers or losses are caused. Therefore, the temperature in the electrical cabinet needs to be controlled, and a temperature control circuit in the prior art, such as Chinese patent number CN208904404U, discloses whether the high-voltage circuit is electrified or not through the arrangement of a high-voltage sensor, a display and an electromagnetic lock, and the control unit is also connected with an RTD thermal resistance element, so that the temperature remote display of the high-voltage power distribution cabinet can be realized, and the temperature early warning and alarm can be performed. But the temperatures in the electrical cabinets are different, so that the heat dissipation schemes are required to be adjusted according to different temperatures, and electronic equipment in the electrical cabinets are protected.

For the problems in the related art, no effective solution has been proposed at present.

Disclosure of Invention

Aiming at the problems in the related art, the utility model provides a temperature control circuit to solve the technical problem that the heat dissipation speed cannot be automatically adjusted according to the temperature in the electric cabinet in the prior electric cabinet.

For this purpose, the utility model adopts the following specific technical scheme:

a temperature control circuit comprises a singlechip MCU, a temperature sensor, a fan, a power amplifier P, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a triode Q5.

The first end of the singlechip MCU is connected with one end of the temperature sensor, the other end of the temperature sensor is connected with one end of the resistor R1, the other end of the resistor R1 is grounded, the second end of the singlechip MCU is connected with the third end of the power amplifier P, the fourth end of the power amplifier P is respectively connected with one end of the capacitor C1 and a first positive power supply, the other end of the capacitor C1 is grounded, the fifth end of the power amplifier P is respectively connected with one end of the capacitor C2 and a first negative power supply, and the first end of the power control of the fan is connected to the first end of the power amplifier P after passing through a power regulation module consisting of the triode Q1, the triode Q2, the triode Q3 and the triode Q4, and the second end of the power control of the fan is connected with the second end of the power amplifier P.

Further, the other end of the resistor R1 is grounded, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is grounded.

Further, the first end of the power amplifier P is connected with one end of the resistor R2, the other end of the resistor R2 is connected with the first end of the triode Q1 and the first end of the triode Q2, and the second end of the triode Q1 is connected with the second end of the triode Q2, the third end of the triode Q3, the third end of the triode Q4 and the first end of the power supply control of the fan.

Further, the first end of the triode Q3 is connected with the third end of the triode Q1, the second end of the triode Q3 is respectively connected with one end of the capacitor C3 and a second positive power supply, the other end of the capacitor C3 is grounded, the first end of the triode Q4 is connected with the third end of the triode Q2, the second end of the triode Q4 is respectively connected with one end of the capacitor C4 and a second negative power supply, and the other end of the capacitor C4 is grounded.

Further, the second end of the power supply control of the fan is also connected with one end of the resistor R3, and the other end of the resistor R3 is grounded.

Further, the third end of the singlechip MCU is connected with one end of the resistor R4, the other end of the resistor R4 is respectively connected with one end of the resistor R5 and the first end of the triode Q5, the other end of the resistor R5 is connected with the second end of the triode Q5 and grounded, and the third end of the triode Q5 is connected with electronic equipment.

Further, the fourth end of the singlechip MCU is connected with an alarm.

Further, the transistor Q1 and the transistor Q4 are NPN transistors.

Further, the transistor Q2, the transistor Q3 and the transistor Q5 are PNP transistors.

Further, the types of the triode Q1 and the triode Q4 are 2N3055A, and the types of the triode Q2, the triode Q3 and the triode Q5 are 2N3250.

The beneficial effects of the utility model are as follows: according to the utility model, the temperature sensor is arranged, the temperature in the electrical cabinet is obtained through the temperature sensor, and after the temperature in the electrical cabinet reaches the preset value, the alarm is used for alarming, so that faults can be effectively avoided. The fan can be started, and the heat in the electric cabinet is blown out through the fan, so that the temperature in the electric cabinet is reduced; further, the driving current of the fan can be automatically adjusted according to the specific temperature in the electric cabinet, so that the rotating speed of the fan is controlled, the heat dissipation speed can be accelerated, the self-adaptive adjustment of the rotating speed of the heat dissipation fan based on the temperature in the electric cabinet is realized, and the temperature in the electric cabinet is stabilized. Meanwhile, when the temperature in the electric cabinet is too high, electronic equipment in the electric cabinet can be protected, and the service life of the electric cabinet is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a temperature control circuit diagram according to an embodiment of the present utility model.

In the figure:

1. a temperature sensor; 2. a fan; 3. an alarm.

Detailed Description

For the purpose of further illustrating the various embodiments, the present utility model provides the accompanying drawings, which are a part of the disclosure of the present utility model, and which are mainly used to illustrate the embodiments and, together with the description, serve to explain the principles of the embodiments, and with reference to these descriptions, one skilled in the art will recognize other possible implementations and advantages of the present utility model, wherein elements are not drawn to scale, and like reference numerals are generally used to designate like elements.

According to an embodiment of the present utility model, there is provided a temperature control circuit.

Referring to the drawings and the detailed description, as shown in fig. 1, a temperature control circuit according to an embodiment of the utility model includes a single chip microcomputer MCU, a temperature sensor 1, a fan 2, a power amplifier P, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a transistor Q1, a transistor Q2, a transistor Q3, a transistor Q4, and a transistor Q5.

The first end of the singlechip MCU is connected with one end of the temperature sensor 1, the other end of the temperature sensor 1 is connected with one end of the resistor R1, the other end of the resistor R1 is grounded, the second end of the singlechip MCU is connected with the third end of the power amplifier P, the fourth end of the power amplifier P is respectively connected with one end of the capacitor C1 and the first positive power supply VCC, the other end of the capacitor C1 is grounded, the fifth end of the power amplifier P is respectively connected with one end of the capacitor C2 and the first negative power supply VEE, and the other end of the capacitor C2 is grounded.

The first end of the power control of the fan 2 is connected to the first end of the power amplifier P after passing through a power supply adjusting module composed of a triode Q1, a triode Q2, a triode Q3 and a triode Q4, and the second end of the power control of the fan 2 is connected with the second end of the power amplifier P.

The power supply adjusting module is as follows: the first end of triode Q1 reaches triode Q2's first end is connected, triode Q1's second end respectively with triode Q2's second end triode Q3's third end triode Q4's third end is connected, triode Q3's first end with triode Q1's third end is connected, triode Q4's first end with triode Q2's third end is connected.

The first end of the power amplifier P is connected with one end of the resistor R2, the other end of the resistor R2 is respectively connected with the first end of the triode Q1 and the first end of the triode Q2, the second end of the triode Q1 is respectively connected with the second end of the triode Q2, the third end of the triode Q3, the third end of the triode Q4 and the first end of the power supply control of the fan 2, the first end of the triode Q3 is connected with the third end of the triode Q1, the second end of the triode Q3 is respectively connected with one end of the capacitor C3 and the second positive power supply VCC, and the other end of the capacitor C3 is grounded.

The first end of the triode Q4 is connected with the third end of the triode Q2, the second end of the triode Q4 is respectively connected with one end of the capacitor C4 and the second negative power supply VEE, the other end of the capacitor C4 is grounded, the power supply control second end of the fan 2 is respectively connected with one end of the resistor R3 and the second end of the power amplifier P, and the other end of the resistor R3 is grounded; the third end of the singlechip MCU is connected with one end of the resistor R4, the other end of the resistor R4 is respectively connected with one end of the resistor R5 and the first end of the triode Q5, the other end of the resistor R5 is connected with the second end of the triode Q5 and grounded, and the third end of the triode Q5 is connected with electronic equipment.

The power supply of the fan 2 can be controlled to give the current through the output quantity of the power supply adjusting module, namely, the rotating speed of the fan is controlled, when the temperature in the electric cabinet is higher, the rotating speed of the fan 2 is controlled to be higher, the self-adaptive adjustment of the temperature in the electric cabinet is realized, the dynamic balance is achieved, and the occurrence of faults caused by the overhigh temperature in the electric cabinet is avoided.

In one embodiment, the fourth end of the singlechip MCU is connected with the alarm 3.

In one embodiment, the transistor Q1 and the transistor Q4 are NPN transistors.

In one embodiment, the transistor Q2, the transistor Q3, and the transistor Q5 are PNP transistors.

In one embodiment, the model of the transistor Q1 and the transistor Q4 is 2N3055A, and the model of the transistor Q2, the model of the transistor Q3 and the model of the transistor Q5 are 2N3250.

It should be noted that the amplifier and the MCU in this patent are conventional modules, which are the prior art, and the present application is direct application to the prior art.

In order to facilitate understanding of the above technical solutions of the present utility model, the following describes in detail the working principle or operation manner of the present utility model in the actual process.

In practical application, the temperature sensor 1 is used for acquiring a temperature signal in the electric cabinet and transmitting the temperature signal to the MCU, the MCU outputs a voltage signal to the power amplifier P according to a specific temperature value, and finally the running current of the fan is accurately controlled through the power supply adjusting module consisting of the triode Q1 and the triodes Q2 to Q4, so that the temperature in the electric cabinet is adaptively adjusted. When the temperature in the electrical cabinet is too high, namely, the fan 2 cannot be controlled in a normal temperature range in a short time, the external power supply is cut off to supply power to the electronic equipment by controlling the conduction of the triode Q5, the fan 2 continues to operate, the effect of protecting the electronic equipment is achieved, namely, over-temperature protection is achieved, and the electrical cabinet can be started after the temperature is restored to be in the normal range.

In summary, the temperature sensor is arranged, the temperature in the electrical cabinet is obtained through the temperature sensor, and the alarm is used for alarming after the temperature in the electrical cabinet reaches the preset value, so that faults can be effectively avoided. The fan can be started, and the heat in the electric cabinet is blown out through the fan, so that the temperature in the electric cabinet is reduced; further, the driving current of the fan can be automatically adjusted according to the specific temperature in the electric cabinet, so that the rotating speed of the fan is controlled, the self-adaptive adjustment of the rotating speed of the cooling fan based on the temperature in the electric cabinet is realized, and the temperature in the electric cabinet is stabilized. Meanwhile, when the temperature in the electric cabinet is too high, electronic equipment in the electric cabinet can be protected, and the service life of the electric cabinet is prolonged.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A temperature control circuit, comprising: the temperature sensor comprises a singlechip MCU, a temperature sensor (1), a fan (2), a power amplifier P, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a triode Q1, a triode Q2, a triode Q3, a triode Q4 and a triode Q5;

the first end of singlechip MCU with temperature sensor (1)'s one end is connected, temperature sensor (1)'s the other end with resistance R1's one end is connected, resistance R1's the other end ground connection, singlechip MCU's second end with power amplifier P's third end is connected, power amplifier P's fourth end respectively with electric capacity C1's one end and first positive power supply are connected, electric capacity C1's the other end ground connection, power amplifier P's fifth end respectively with electric capacity C2's one end and first negative power supply are connected, power control first end of fan (2) is connected to power amplifier P's first end after passing through triode Q1, triode Q2, triode Q3, triode Q4 constitutes power regulation module, power control second end of fan (2) with power amplifier P's second end is connected.

2. A temperature control circuit according to claim 1, wherein the other end of the resistor R1 is grounded, the other end of the capacitor C1 is grounded, and the other end of the capacitor C2 is grounded.

3. A temperature control circuit according to claim 2, wherein the first end of the power amplifier P is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the first end of the transistor Q1 and the first end of the transistor Q2, and the second end of the transistor Q1 is connected to the second end of the transistor Q2, the third end of the transistor Q3, the third end of the transistor Q4, and the first end of the power supply control of the fan (2), respectively.

4. A temperature control circuit according to claim 3, wherein the first end of the transistor Q3 is connected to the third end of the transistor Q1, the second end of the transistor Q3 is connected to one end of the capacitor C3 and the second positive power supply, the other end of the capacitor C3 is grounded, the first end of the transistor Q4 is connected to the third end of the transistor Q2, the second end of the transistor Q4 is connected to one end of the capacitor C4 and the second negative power supply, and the other end of the capacitor C4 is grounded.

5. A temperature control circuit according to claim 4, wherein the power control second end of the fan (2) is further connected to one end of the resistor R3, and the other end of the resistor R3 is grounded.

6. The temperature control circuit according to claim 5, wherein a third end of the single chip microcomputer MCU is connected to one end of the resistor R4, the other end of the resistor R4 is connected to one end of the resistor R5 and the first end of the transistor Q5, the other end of the resistor R5 is connected to the second end of the transistor Q5 and grounded, and the third end of the transistor Q5 is connected to an electronic device.

7. The temperature control circuit according to claim 1, wherein the fourth end of the single-chip microcomputer MCU is connected with an alarm (3).

8. The temperature control circuit of claim 1, wherein the transistor Q1 and the transistor Q4 are NPN transistors.

9. The temperature control circuit of claim 1, wherein the transistor Q2, the transistor Q3, and the transistor Q5 are PNP transistors.

10. The temperature control circuit of claim 1, wherein the transistor Q1 and the transistor Q4 are of a type 2N3055A, and the transistors Q2, Q3 and Q5 are of a type 2N3250.