CN219420043U - Top ventilation and cooling device for power cabinet - Google Patents
Top ventilation and cooling device for power cabinet Download PDFInfo
- Publication number
- CN219420043U CN219420043U CN202320090884.9U CN202320090884U CN219420043U CN 219420043 U CN219420043 U CN 219420043U CN 202320090884 U CN202320090884 U CN 202320090884U CN 219420043 U CN219420043 U CN 219420043U
- Authority
- CN
- China
- Prior art keywords
- resistor
- triode
- grounding
- temperature sensor
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Temperature (AREA)
Abstract
The utility model is used for a top ventilation and cooling device of a power cabinet, a difference value 1 is calculated by a differential balance amplifier between a temperature signal in the power cabinet detected by a temperature sensor in the power cabinet and a set temperature signal, the difference value is amplified in an in-phase mode and then is added to a photoelectric coupler, a difference value 2 is calculated by the differential amplifier between the temperature signal in the power cabinet detected by the temperature sensor outside the power cabinet and the ambient temperature outside the power cabinet, when the difference value 2 is positive and more than 0.7V, a triode Q3 is conducted, the photoelectric coupler is not conducted, a triode Q4 is conducted, a thyristor T1 is triggered and conducted, the conduction angle of a bidirectional thyristor T2 is controlled by the difference value 1, the rotating speed of a fan motor B2 is further regulated, when the difference value 2 is negative or less than 0.7V, the triode Q is cut off, a pin 2 of the photoelectric coupler is grounded, the photoelectric coupler is conducted, the triode Q5 is conducted, an electric window air valve driving motor B1 is powered on, natural ventilation is conducted, and the heat dissipation of the air window is opened, and the required temperature and the heat dissipation quantity can be reduced.
Description
Technical Field
The utility model relates to the technical field of power cabinets, in particular to a top ventilation and cooling device for a power cabinet.
Background
The power cabinet is an electrical control cabinet combination for providing power for the normal operation of the whole machine, and comprises a contactor, a frequency converter, a high-voltage cabinet, a transformer and the like, wherein the volume is large, the number of internal devices is large, the number of the internal devices is relatively complex, the power equipment is controlled, the environment temperature and the internal devices generate heat, the sensitivity of part of electrical elements in the power cabinet can be influenced, the internal high temperature of the power cabinet is damaged, the prior art adopts the arrangement of ventilating windows or radiating holes at the top and the side of the power cabinet, and a fan is arranged for controlling the temperature in the cabinet, but the fixed air quantity control is realized, and the temperature required in the cabinet cannot be matched with the fan or the heat radiation of the natural ventilation.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide the top ventilation and cooling device for the power cabinet, which effectively solves the problems that the adopted constant air volume control cannot realize the matching of the temperature required in the cabinet and the heat dissipation of a fan or natural ventilation.
The technical scheme is that the intelligent cabinet temperature control device comprises a ventilation window air valve, a fan, a cabinet temperature sensor and a cabinet outside temperature sensor, and is characterized in that the cabinet inside temperature sensor and the cabinet outside temperature sensor are connected with a signal processor, and the signal processor is connected with the ventilation window air valve and the fan;
the signal processor comprises a temperature sensor RT1, the upper end of the temperature sensor RT1 is connected with a power supply +5V, the lower end of the temperature sensor RT1 is respectively connected with one end of a grounding resistor R15, the anode of a grounding electrolytic capacitor C3, one end of a grounding resistor R16 and one end of a resistor R17, the other end of the resistor R17 is respectively connected with one end of a grounding capacitor C4, one end of a resistor R18, the base electrode of a triode Q2, one end of the grounding resistor R4 and one end of a resistor R3, the collector electrode of the triode Q2 is respectively connected with the other end of the resistor R3 and one end of the resistor R2, the emitter electrode of the triode Q2 is connected with the right end of a potentiometer RW1, the adjustable end of the potentiometer RW1 is connected with the ground, the left end of the potentiometer RW1 is connected with one end of the capacitor C1, the other end of the capacitor C1 is connected with the emitter electrode of the triode Q1, the base electrode of the triode Q1 is connected with the adjustable end of the potentiometer RW2, the left end of the potentiometer RW2 is connected with a set temperature signal, the right end of the potentiometer RW2 is respectively connected with the collector of the triode Q1, one end of the resistor R1 and one end of the resistor R5, the other end of the resistor R1 and the other end of the resistor R2 are connected with the power +5V, the other end of the resistor R5 is respectively connected with the non-inverting input end of the operational amplifier AR4 and one end of the resistor R7, the inverting input end of the operational amplifier AR4 is connected with the ground through the resistor R6, the output end of the operational amplifier AR4 is respectively connected with the other end of the resistor R7 and one end of the resistor R8, the other end of the resistor R8 is connected with the anode of the diode D1, the cathode of the diode D1 is respectively connected with one end of the grounding resistor R9, one end of the grounding capacitor C2, the pin 1 of the thyristor T1 and the anode of the photoelectric coupler U1, the other end of the resistor R18 is connected with the non-inverting input end of the operational amplifier AR2, the inverting input end of the operational amplifier AR2 is respectively connected with one end of the resistor R19 and one end of the grounding resistor R20, the outdoor temperature signal detected by the sensor at the other end of the resistor R19 is output by the operational amplifier AR2, the anode of the diode D2 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q3 is connected with the power supply +5V through the resistor R22, the emitter electrode of the triode Q3 is respectively connected with one end of the grounding resistor R21 and the pin 1 of the photoelectric coupler U1, the pin 4 of the photoelectric coupler U1 is connected with the power supply +15V through the resistor R11, the pin 3 of the photoelectric coupler U1 is respectively connected with one end of the grounding resistor R23, one end of the resistor R13 and one end of the resistor R10, the other end of the resistor R13 is connected with the base electrode of the triode Q5, the collector electrode of the triode Q5 is connected with the power supply +15V through the resistor R12, the emitter electrode of the triode Q5 is connected with the anode electrode of the electric window air valve driving motor B1, the cathode of the electric window air valve driving motor B1 is connected with the ground, the other end of the resistor R10 is respectively connected with one end of the capacitor C5, the other end of the pin 1 of the photoelectric coupler U1 is connected with the other end of the capacitor C4, the other end of the triode Q4 is connected with the base electrode of the AC thyristor, and the other end of the control thyristor is connected with the anode of the AC power supply wire of the resistor C2T 2 is connected with the anode of the resistor C2, and the other end of the AC power supply is connected with the anode of the AC current of the DC 2 is connected with the DC 2, and the DC 2 is connected with the DC 2.
The utility model has the beneficial effects that: the difference value 1 is calculated by the differential balance amplifier between the detected temperature signal in the power cabinet and the set temperature signal, after the difference value is amplified in phase, one path of the difference value is added to the pin 1 of the photoelectric coupler, the other path of the difference value is added to the anode of the thyristor T1, the difference value 2 is calculated by the differential amplifier between the detected temperature signal in the power cabinet and the external environment temperature of the power cabinet, when the difference value 2 is positive and larger than 0.7V, the triode Q3 is conducted, the pin 2 of the photoelectric coupler is high level, the photoelectric coupler is not conducted, the triode Q4 is conducted, the thyristor T1 is triggered to be conducted, the difference value 1 controls the conduction angle of the bidirectional thyristor T2, the rotating speed of the fan motor B2 is regulated, namely, the fan power is regulated according to the required temperature in the cabinet, when the difference value 2 is negative or smaller than 0.7V, the triode Q is cut off, the pin 2 of the photoelectric coupler is grounded, the triode Q5 is conducted, the electric air valve drives the motor B1 to obtain electricity, and the air window is opened to conduct natural heat dissipation, and the required temperature reduction and heat dissipation can be realized.
Drawings
Fig. 1 is a schematic circuit diagram of the present utility model.
Detailed Description
The foregoing and other features, aspects and advantages of the present utility model will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying fig. 1. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
The first embodiment is a top ventilation and cooling device for a power cabinet, comprising a ventilation window air valve, a fan, a temperature sensor in the cabinet and a temperature sensor outside the cabinet, wherein the temperature sensor in the cabinet and the temperature sensor outside the cabinet are connected with a signal processor, and the signal processor is connected with the ventilation window air valve and the fan;
the signal processor receives the temperature signal in the power cabinet detected by the temperature sensor RT1, and specifically adopts a thermistor with a negative temperature coefficient to detect, the temperature is higher and the resistance is smaller, the temperature is divided by the resistor R15 and then converted into a signal with higher temperature and larger divided voltage, the signal is filtered and then added into a differential balance amplifier formed by taking the triode Q1 and the triode Q2 as cores, the differential balance amplifier is also connected into a set temperature signal corresponding to the proper temperature in the power cabinet to calculate a differential value 1, the potentiometer RW1 is used for adjusting the symmetry of the triode Q1 and the triode Q2, the potentiometer RW2 is used for adjusting the size of the set temperature signal, the signal is then fed into an in-phase amplifier formed by the operational amplifier AR4 and the resistor R5-resistor R7 to be amplified in-phase proportion, the signal is filtered by the unidirectional conducting diode D1, the resistor R9 and the capacitor C2 and then added into a pin 1 of the photoelectric coupler U1, the difference value 2 is calculated by a differential amplifier formed by an operational amplifier AR2 and a resistor R18-resistor R20 through the detected temperature signal in the power cabinet and the detected temperature signal outside the power cabinet (namely the outdoor temperature signal), when the difference value 2 is positive and is larger than 0.7V, a triode Q3 is conducted, a pin 2 of a photoelectric coupler U1 is high level, the photoelectric coupler U1 is not conducted, a triode Q4 is conducted, a thyristor T1 is triggered to conduct, the difference value 1 controls the conduction angle of the bidirectional thyristor T2, the rotating speed of a fan motor B2 is regulated, namely, the fan power is regulated according to the required temperature in the power cabinet, when the difference value 2 is negative or smaller than 0.7V, the triode Q3 is cut off, the pin 2 of the photoelectric coupler U1 is grounded, the triode Q5 is conducted, an electric window and a wind valve drives the motor B1 to be electrified, a wind window is opened to conduct natural ventilation, the required temperature reduction and the heat dissipation can be realized, comprises a temperature sensor RT1, the upper end of the temperature sensor RT1 is connected with a power supply +5V, the lower end of the temperature sensor RT1 is respectively connected with one end of a grounding resistor R15, the positive electrode of a grounding capacitor C3, one end of a grounding resistor R16 and one end of a resistor R17, the other end of the resistor R17 is respectively connected with one end of a grounding capacitor C4, one end of a resistor R18, the base electrode of a triode Q2, one end of the grounding resistor R4 and one end of the resistor R3, the collector electrode of the triode Q2 is respectively connected with the other end of the resistor R3 and one end of the resistor R2, the emitter electrode of the triode Q2 is connected with the right end of a potentiometer RW1, the adjustable end of the potentiometer RW1 is connected with the ground, the left end of the potentiometer RW1 is connected with one end of the capacitor C1, the other end of the capacitor C1 is connected with the emitter electrode of the triode Q1, the base electrode of the triode Q1 is connected with the adjustable end of the potentiometer RW2, the left end of the potentiometer RW2 is connected with a set temperature signal, the right end of the potentiometer RW2 is respectively connected with the collector of the triode Q1, one end of the resistor R1 and one end of the resistor R5, the other end of the resistor R1 and the other end of the resistor R2 are connected with the power +5V, the other end of the resistor R5 is respectively connected with the non-inverting input end of the operational amplifier AR4 and one end of the resistor R7, the inverting input end of the operational amplifier AR4 is connected with the ground through the resistor R6, the output end of the operational amplifier AR4 is respectively connected with the other end of the resistor R7 and one end of the resistor R8, the other end of the resistor R8 is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is respectively connected with one end of the grounding resistor R9, one end of the grounding capacitor C2, the pin 1 of the photoelectric coupler U1 and the anode of the thyristor T1, the other end of the resistor R18 is connected with the non-inverting input end of the operational amplifier AR2, the inverting input end of the operational amplifier AR2 is respectively connected with one end of the resistor R19 and one end of the grounding resistor R20, the other end of the resistor R19 is connected with the outdoor temperature signal detected by a sensor, the output end of the operational amplifier AR2 is connected with the positive electrode of the diode D2, the negative electrode of the diode D2 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q3 is connected with a power supply +5V through a resistor R22, the emitter electrode of the triode Q3 is respectively connected with one end of a grounding resistor R21 and a pin 1 of a photoelectric coupler U1, a pin 4 of the photoelectric coupler U1 is connected with a power supply +15V through a resistor R11, the pin 3 of the photoelectric coupler U1 is respectively connected with one end of a grounding resistor R23, one end of a resistor R13 and one end of a resistor R10, the other end of the resistor R13 is connected with the base electrode of a triode Q5, the collector electrode of the triode Q5 is connected with a power supply +15V through a resistor R12, the emitter electrode of the triode Q5 is connected with the positive electrode of an electric window air valve driving motor B1, the negative electrode of the electric window air valve driving motor B1 is connected with the ground, the other end of the resistor R10 is respectively connected with one end of a capacitor C5, the base electrode of the triode Q4 and the other end of the capacitor C5 are connected with +9V, the other end of the triode Q4 is connected with the other end of the power supply C4, the control thyristor T1 is connected with the positive electrode of the control thyristor T2 of the thyristor T2, and the other end of the positive electrode of the control thyristor is connected with the positive electrode of the thyristor T2 is connected with the AC current fan 220B 2.
Claims (2)
1. The top ventilation and cooling device for the power cabinet comprises a ventilation window air valve, a fan, a temperature sensor in the cabinet and a temperature sensor outside the cabinet, and is characterized in that the temperature sensor in the cabinet and the temperature sensor outside the cabinet are connected with a signal processor, and the signal processor is connected with the ventilation window air valve and the fan;
the signal processor comprises a temperature sensor RT1, the upper end of the temperature sensor RT1 is connected with a power supply +5V, the lower end of the temperature sensor RT1 is respectively connected with one end of a grounding resistor R15, the anode of a grounding electrolytic capacitor C3, one end of a grounding resistor R16 and one end of a resistor R17, the other end of the resistor R17 is respectively connected with one end of a grounding capacitor C4, one end of a resistor R18, the base electrode of a triode Q2, one end of the grounding resistor R4 and one end of a resistor R3, the collector electrode of the triode Q2 is respectively connected with the other end of the resistor R3 and one end of the resistor R2, the emitter electrode of the triode Q2 is connected with the right end of a potentiometer RW1, the adjustable end of the potentiometer RW1 is connected with the ground, the left end of the potentiometer RW1 is connected with one end of the capacitor C1, the other end of the capacitor C1 is connected with the emitter electrode of the triode Q1, the base electrode of the triode Q1 is connected with the adjustable end of the potentiometer RW2, the left end of the potentiometer RW2 is connected with a set temperature signal, the right end of the potentiometer RW2 is respectively connected with the collector of the triode Q1, one end of the resistor R1 and one end of the resistor R5, the other end of the resistor R1 and the other end of the resistor R2 are connected with the power +5V, the other end of the resistor R5 is respectively connected with the non-inverting input end of the operational amplifier AR4 and one end of the resistor R7, the inverting input end of the operational amplifier AR4 is connected with the ground through the resistor R6, the output end of the operational amplifier AR4 is respectively connected with the other end of the resistor R7 and one end of the resistor R8, the other end of the resistor R8 is connected with the anode of the diode D1, the cathode of the diode D1 is respectively connected with one end of the grounding resistor R9, one end of the grounding capacitor C2 and the pin (1) of the photoelectric coupler U1 and the anode of the thyristor T1, the other end of the resistor R18 is connected with the non-inverting input end of the operational amplifier AR2, the inverting input end of the operational amplifier AR2 is respectively connected with one end of the resistor R19 and one end of the grounding resistor R20, the outdoor temperature signal detected by the sensor at the other end of the resistor R19 is output by the operational amplifier AR2, the positive electrode of the diode D2 is connected, the negative electrode of the diode D2 is connected with the base electrode of the triode Q3, the collector electrode of the triode Q3 is connected with the power supply +5V through the resistor R22, the emitter electrode of the triode Q3 is respectively connected with one end of the grounding resistor R21 and the pin (2) of the photoelectric coupler U1, the pin (4) of the photoelectric coupler U1 is connected with the power supply +15V through the resistor R11, the pin (3) of the photoelectric coupler U1 is respectively connected with one end of the grounding resistor R23, one end of the resistor R13 and one end of the resistor R10, the other end of the resistor R13 is connected with the base electrode of the triode Q5, the collector electrode of the triode Q5 is connected with the power supply +15V through the resistor R12, the positive pole of electronic wind window blast gate driving motor B1 is connected to triode Q5's projecting pole, electric wind window blast gate driving motor B1's negative pole is connected to ground, electric capacity C5's one end is connected respectively to resistance R10's the other end, triode Q4's base, power +9V is connected to triode Q4's projecting pole and electric capacity C5's the other end, thyristor T1's control pole is connected to triode Q4's collecting electrode, thyristor T1's negative pole one end is connected to resistance R14's the other end and is connected one end of ground connection electric capacity C5 respectively, bidirectional thyristor T1's control pole, fan motor B2's one end is connected to thyristor T1's second positive pole, alternating current 220V power's N line is connected to fan motor B2's the other end, alternating current 220V power's L line is connected to thyristor T1's first positive pole.
2. The top ventilation and cooling device for a power cabinet according to claim 1, wherein the temperature sensor RT1 is a negative temperature coefficient thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320090884.9U CN219420043U (en) | 2023-01-31 | 2023-01-31 | Top ventilation and cooling device for power cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320090884.9U CN219420043U (en) | 2023-01-31 | 2023-01-31 | Top ventilation and cooling device for power cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219420043U true CN219420043U (en) | 2023-07-25 |
Family
ID=87232326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320090884.9U Active CN219420043U (en) | 2023-01-31 | 2023-01-31 | Top ventilation and cooling device for power cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219420043U (en) |
-
2023
- 2023-01-31 CN CN202320090884.9U patent/CN219420043U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201185355Y (en) | High voltage line induction electricity-taking apparatus | |
| CN202971260U (en) | Electric fan temperature control circuit | |
| CN105226346A (en) | The battery thermostatic equipment of many rotor wing unmanned aerial vehicles and temp measuring method | |
| CN207335783U (en) | Insulator state on-line monitoring system | |
| CN219420043U (en) | Top ventilation and cooling device for power cabinet | |
| CN205081524U (en) | Take solar energy emergency power source of fan | |
| CN204732855U (en) | A kind of motor over-temperature controller | |
| CN107800204A (en) | A kind of power system arrester on-line monitoring system | |
| CN201623678U (en) | Automatic speed regulating device of radiating fan based on single chip microcomputer PWM | |
| CN203722722U (en) | Television heat dissipation device and television | |
| CN209544463U (en) | A kind of frequency modulation battery case | |
| CN205160107U (en) | Control circuit of adapter | |
| CN204536951U (en) | A kind of electricity warm fan Intelligent heating circuit | |
| CN204089154U (en) | The overvoltage crowbar of a kind of ultra-high-tension power transmission line ground wire power taking | |
| CN209748018U (en) | Solar heat dissipation device of low-voltage power metering box | |
| CN204478384U (en) | The distributed cooling blower controller of central air conditioning | |
| CN206594550U (en) | The temperature-detecting device of comprehensive distribution box | |
| CN206575190U (en) | A kind of charger automatically powered off | |
| CN207879647U (en) | A kind of permanent air quantity blower fan applied to wall-hung boiler | |
| CN206922211U (en) | A kind of high temperature supplies power distributing cabinet from early warning type | |
| CN205752341U (en) | A kind of electric automobile is by battery core multiloop grading control battery bag | |
| CN209308995U (en) | Fan speed adjusting device and emergency power supply | |
| CN207945781U (en) | A kind of electric substation's capacitor chamber and ground connection become chamber ventilated structure | |
| CN219176595U (en) | Small fan with temperature sensing and automatic control functions | |
| CN212837529U (en) | Screen window capable of adjusting indoor temperature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |