CN209782929U - Automatic air quality control device for book reading room - Google Patents
Automatic air quality control device for book reading room Download PDFInfo
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- CN209782929U CN209782929U CN201822264472.4U CN201822264472U CN209782929U CN 209782929 U CN209782929 U CN 209782929U CN 201822264472 U CN201822264472 U CN 201822264472U CN 209782929 U CN209782929 U CN 209782929U
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- resistor
- air quality
- circuit
- operational amplifier
- voltage stabilizing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model relates to the technical field of electronic control, in particular to an automatic control device for air quality of a book reading room, which comprises a power circuit connected with a power supply, a detection amplifying circuit connected with the power circuit and an alarm and air interchanger control circuit connected with an air interchanger, wherein the alarm and air interchanger control circuit is connected with the detection amplifying circuit; the power supply circuit comprises a fuse FU, a transformer TG, rectifying elements D2-D5, a filter element C1 and a voltage stabilizing block IC2 which are connected in sequence, wherein a resistor R6 and a light emitting diode LED2 are connected between the filter element C1 and the voltage stabilizing block IC2, and then the ground is connected. The utility model has simple structure, can automatically control the ventilation device, and saves time and labor; the indoor air is ensured to be fresh, the body health of people is facilitated, the manufacturing cost is low, the service life is long, and the occupied volume is small; is suitable for wide popularization and application.
Description
Technical Field
The utility model belongs to the technical field of the electronic control technique and specifically relates to a books reading room air quality automatic control device is related to.
Background
College libraries and reading rooms are used as important places for teachers and students to acquire knowledge, and the indoor air quality condition of reading rooms is closely related to the learning effect and physical and mental health of readers. In the prior reading room, particularly, readers are concentrated on weekends, and the indoor carbon dioxide content is increased, the oxygen content is reduced, the smell is large, and the air is dirty due to the fact that the door and the window are tightly closed when the air conditioner is opened. Tests and experiments show that when the content of indoor CO2 reaches 1000PPM, symptoms such as tiredness, low attention and discomfort can be caused, and the physical and mental health and learning effects of readers are seriously influenced. The prior indoor air pollution monitoring device composed of electronic components has complex circuit composition and high production cost, and when the indoor air quality is detected to be poor, only prompt is carried out, and ventilation and air exchange are still carried out manually, so that the use is inconvenient.
The existing control system has the disadvantages of more elements, complex structure, high manufacturing cost and large occupied space. And the stability of the power supply voltage is poor, so that the control system and even the ventilation equipment are easily damaged. And it is not known that the control system is damaged.
SUMMERY OF THE UTILITY MODEL
the utility model discloses an overcome prior art not enough, provide a compact structure, simple, reasonable in design, use cost is low, the little book reading room air quality automatic control device of occupation space.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an automatic control device for air quality of a book reading room comprises a power supply circuit connected with a power supply, a detection amplifying circuit connected with the power supply circuit and an alarm and ventilation device control circuit connected with a ventilation device, wherein the alarm and ventilation device control circuit is connected with the detection amplifying circuit; the power supply circuit comprises a fuse FU, a transformer TG, rectifying elements D2-D5, a filter element C1 and a voltage stabilizing block IC2 which are connected in sequence, wherein a resistor R6 and a light emitting diode LED2 are connected between the filter element C1 and the voltage stabilizing block IC2, and then the ground is connected. When the air interchanger is used, the indoor air quality can be detected through the detection amplifying circuit, and then the air interchanger is controlled to run or stop through the air interchanger control circuit, so that the aim of air interchange is fulfilled; the power supply circuit processes the power supply, so that the power supply stability is ensured, and the automatic control device and the air interchanger are prevented from being damaged; the transformer, the rectifier, the filter element and the voltage stabilizing block can transform, rectify, filter and stabilize the power supply and then supply the power supply to the detection amplifying circuit, the alarm and air interchanger control circuit and the air interchanger, and the power supply after a series of processing is more stable and safe; the automatic control device and the air interchanger are well protected, are not easy to damage and have long service life; the resistor R6 and the light emitting diode LED2 can conveniently identify whether the power supply is switched on or not; the indoor air quality can be automatically detected, the ventilation device is automatically started, the indoor air and the outdoor air are convected, automatic control is realized, the indoor air can be always fresh for reading, and the health of a reader is facilitated; moreover, the automatic control device has the advantages of small number of required elements, compact and simple structure, reasonable design, low use cost, small occupied space and good use effect, and is suitable for wide popularization and application.
Further, the detection amplifying circuit comprises an air quality sensing assembly, a resistor R5 and the anode of an operational amplifier IC1 which are connected in sequence, the cathode of the operational amplifier is connected with the resistor R3 and the resistor R4, and the operational amplifier IC1 is grounded; one end of the resistor R3 is connected with the output end of the voltage stabilizing block IC2, and the other end of the resistor R3 is connected with one end of the circuit R4; the other end of the resistor R4, the resistor R5 and the air quality sensing assembly are all grounded; the negative electrode of the operational amplifier IC1 is connected between the resistor R3 and the resistor R4; the output end of the operational amplifier IC1 is connected with an alarm and ventilator control circuit; the air quality sensing assembly is connected with the output end of the voltage stabilizing block IC 2. The detection amplifying circuit is simple in structure, small in element number, low in manufacturing cost and good in using effect.
Further, the air mass sensing component is a PM135 air mass sensor.
Further, the alarm and ventilation device control circuit comprises a resistor R2 connected with the output end of the operational amplifier IC1, and a triode V1 input end connected with the resistor R2; the triode V1 is grounded, the output end of the triode V1 is connected with the relay J, the negative electrode of the light emitting diode LED1 and the positive electrode of the diode D1, the positive electrode of the light emitting diode LED1 is connected with one end of the resistor R1, and the negative electrodes of the resistor R1 and the diode D1 are connected between the relay J and the voltage stabilizing block IC 2. The alarm and ventilation device control circuit can realize the control of the luminous alarm and the ventilation device, and has the advantages of less element number, simple structure, low manufacturing cost and good use effect.
In conclusion, the utility model has simple structure, can automatically control the ventilation device, and saves time and labor; the indoor air is ensured to be fresh, the body health of people is facilitated, the manufacturing cost is low, the service life is long, and the occupied volume is small; is suitable for wide popularization and application.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention;
Wherein, the power supply circuit 1; a detection amplification circuit 2; an alarm and ventilator control circuit 3.
Detailed Description
In order to make the technical field personnel understand the utility model discloses the scheme, will combine the drawing in the embodiment of the utility model below, to the technical scheme in the embodiment of the utility model carries out clear, complete description.
As shown in FIG. 1, an automatic control device for air quality of book reading room comprises a power circuit 1, a detection and amplification circuit 2, and an alarm and ventilation device control circuit 3. Wherein, the power circuit 1 is connected with a power supply, and the alarm and ventilator control circuit 3 is connected with a ventilator. The power supply circuit 1 is connected to a detection amplifier circuit 2, and the detection amplifier circuit 2 is connected to an alarm and ventilator control circuit 3.
Specifically, the power supply circuit 1 includes a fuse FU, a transformer TG, rectifier elements D2-D5, a filter element C1, a voltage regulator block IC2, a resistor R6, and a light emitting diode LED 2. The fuse FU, the transformer TG, the rectifying elements D2-D5, the filtering element C1 and the voltage stabilizing block IC2 are sequentially connected, and a resistor R6 and a light emitting diode LED2 are connected between the filtering element C1 and the voltage stabilizing block IC2 and then grounded.
Specifically, the detection amplifying circuit 2 includes an air quality sensing element, an operational amplifier IC1, a resistor R3, a resistor R4, and a resistor R5. The air quality sensing assembly, the resistor R5 and the anode of the operational amplifier IC1 are connected in sequence. The negative electrode of the operational amplifier is connected with the resistor R3 and the resistor R4, and the operational amplifier IC1 is grounded. One end of the resistor R3 is connected with the output end of the voltage stabilizing block IC2, and the other end of the resistor R3 is connected with one end of the circuit R4. The other end of the resistor R4, the resistor R5 and the air quality sensing assembly are all grounded. The negative pole of the operational amplifier IC1 is connected between the resistor R3 and the resistor R4. The output of the operational amplifier IC1 is connected to an alarm and ventilator control circuit. The air quality sensing assembly is connected with the output end of the voltage stabilizing block IC 2. The air quality sensing component may be a CO2 concentration sensor, a CO concentration sensor, an O2 concentration sensor, or the like. In the present embodiment, however, the air mass sensing component is preferably a PM135 air mass sensor.
Preferably, the alarm and ventilation device control circuit comprises a resistor R2, a transistor V1, a resistor R1, a light emitting diode LED1, a diode D1 and a relay J.
The resistor R2 and the resistor R2 which are connected with the output end of the operational amplifier IC1 are connected with the input end of the triode V1, and the triode V1 is grounded. The output end of the triode V1 is connected with the relay J, the negative electrode of the light emitting diode LED1 and the positive electrode of the diode D1, the positive electrode of the light emitting diode LED1 is connected with one end of the resistor R1, and the negative electrodes of the resistor R1 and the diode D1 are connected between the relay J and the voltage stabilizing block IC 2. The relay J is connected with the air interchanger. The ventilation device adopts the existing ventilation fan, and can be other ventilation fans.
Adopt the utility model discloses a book reading room air quality automatic control device, transformer TG carry out the step-down operation with 220V mains voltage, rectifier cell D2-D5 rectification, filter element C1 filtering, output 9V DC voltage, through voltage stabilizing block IC2 steady voltage again, output 5V DC power supply, emitting diode LED2, resistance R6 constitute power indicator circuit. The air quality sensing assembly, the operational amplifier IC1, the resistor R3, the resistor R4 and the resistor R5 form a detection amplifying circuit, when indoor air pollution reaches a certain degree, the air quality sensing assembly outputs a certain voltage value, the certain voltage value is coupled to the positive electrode pin of the operational amplifier IC1 through the resistor R5, the internal part of the operational amplifier IC1 is compared with the set value of the negative electrode pin, the output pin outputs a high level when the internal part is larger than the set value, and the start control value can be adjusted through a fine-tuning resistor R5 in the air quality sensing assembly. The resistor R2, the triode V1, the resistor R1, the light emitting diode LED1, the diode D1 and the relay J form an alarm and ventilator control circuit. The output voltage of the operational amplifier IC1 makes the triode V1 saturated and conducted through the resistor R2, the light-emitting diode LED1 emits light, the relay J attracts, and the ventilating fan is driven to ventilate. When the indoor air is normal, the output voltage of the sensor is reduced, the output voltage of the operational amplifier IC1 is reduced, the triode V1 is cut off, the light-emitting diode LED1 is extinguished, the relay J is released, and the ventilation fan is automatically closed. The type of the relay J can be selected according to the type and the number of the air interchangers.
The device is mainly used in book reading rooms, and can be used in places such as classrooms, ticket selling halls, waiting halls and the like. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a book reading room air quality automatic control device which characterized in that: the device comprises a power circuit (1) connected with a power supply, a detection amplifying circuit (2) connected with the power circuit (1) and an alarm and ventilation device control circuit (3) connected with a ventilation device, wherein the alarm and ventilation device control circuit (3) is connected with the detection amplifying circuit (2); the power supply circuit comprises a fuse FU, a transformer TG, rectifying elements D2-D5, a filter element C1 and a voltage stabilizing block IC2 which are connected in sequence, wherein a resistor R6 and a light emitting diode LED2 are connected between the filter element C1 and the voltage stabilizing block IC2, and then the ground is connected.
2. The book-reading room air quality automatic control device of claim 1, characterized in that: the detection amplifying circuit (2) comprises an air quality sensing assembly, a resistor R5 and the anode of an operational amplifier IC1 which are sequentially connected, the cathode of the operational amplifier is connected with the resistor R3 and the resistor R4, and the operational amplifier IC1 is grounded; one end of the resistor R3 is connected with the output end of the voltage stabilizing block IC2, and the other end of the resistor R3 is connected with one end of the circuit R4; the other end of the resistor R4, the resistor R5 and the air quality sensing assembly are all grounded; the negative electrode of the operational amplifier IC1 is connected between the resistor R3 and the resistor R4; the output end of the operational amplifier IC1 is connected with an alarm and ventilator control circuit; the air quality sensing assembly is connected with the output end of the voltage stabilizing block IC 2.
3. The book-reading room air quality automatic control device of claim 2, characterized in that: the air quality sensing component is a PM135 air quality sensor.
4. The book-reading room air quality automatic control device of claim 1, characterized in that: the alarm and ventilation device control circuit comprises a resistor R2 connected with the output end of the operational amplifier IC1 and a triode V1 input end connected with a resistor R2; the triode V1 is grounded, the output end of the triode V1 is connected with the relay J, the negative electrode of the light emitting diode LED1 and the positive electrode of the diode D1, the positive electrode of the light emitting diode LED1 is connected with one end of the resistor R1, and the negative electrodes of the resistor R1 and the diode D1 are connected between the relay J and the voltage stabilizing block IC 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822264472.4U CN209782929U (en) | 2018-12-31 | 2018-12-31 | Automatic air quality control device for book reading room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822264472.4U CN209782929U (en) | 2018-12-31 | 2018-12-31 | Automatic air quality control device for book reading room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209782929U true CN209782929U (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822264472.4U Active CN209782929U (en) | 2018-12-31 | 2018-12-31 | Automatic air quality control device for book reading room |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209782929U (en) |
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2018
- 2018-12-31 CN CN201822264472.4U patent/CN209782929U/en active Active
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