CN2323300Y - Automatic ventilating fan - Google Patents
Automatic ventilating fan Download PDFInfo
- Publication number
- CN2323300Y CN2323300Y CN 97231022 CN97231022U CN2323300Y CN 2323300 Y CN2323300 Y CN 2323300Y CN 97231022 CN97231022 CN 97231022 CN 97231022 U CN97231022 U CN 97231022U CN 2323300 Y CN2323300 Y CN 2323300Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- temperature
- exhaust fan
- automatic exhaust
- thermoswitch
- 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.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 229910000679 solder Inorganic materials 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Control Of Temperature (AREA)
Abstract
The utility model relates to an automatic exhaust fan which is controlled by the comparison of temperature difference. The automatic exhaust fan has a temperature detection comparison switch circuit, a resistance capacity time delay circuit and working state indication. The utility model has high sensitivity, accurate and reliable operation and long service life. When the measured temperature is higher than the environment temperature, the automatic exhaust fan can be automatically and effectively detected and started, and the light indication is simultaneously sent out. The defect that an executing relay is destroyed for frequent electricity reception and loss when detected temperature reaches the set value can also be overcome.
Description
The utility model relates to and utilizes wall type or window fan to discharge the ventilation unit of air through wall or window, relates in particular to a kind of automatic exhaust fan that utilizes temperature-sensitive element to make sense switch.
" novel fan principle and maintenance " book (1995ISBN7-04-005135-4) that Beijing publishing house of academy publishes, introduced a kind of automatic exhaust fan that adopts temperature-sensitive element to make sense switch, when indoor temperature reaches setting value, can detect and start exhaust fan automatically effectively, reduce indoor temperature, but its serviceability needs further improvement still.
The purpose of this utility model is to remedy the deficiencies in the prior art, proposes a kind of automatic exhaust fan of relatively being controlled by the temperature difference.
This automatic exhaust fan comprises exhaust fan, power transformer, by temperature-sensitive element, temperature detection, temperature difference comparison circuit, switch triode with hold the thermoswitch circuit of forming with relay, it is characterized in that:
Detection signal input at the testing circuit of thermoswitch circuit is provided with the temperature comparison bridge of being made up of heat-sensitive sensor and thermistor;
Be provided with the detected temperatures of forming by the adjustable resistance of heat-sensitive sensor and series connection with it at the detection signal input of the testing circuit of thermoswitch circuit and measure circuit in advance;
In the thermoswitch circuit, be provided with rc-delay circuit;
The power transformer of this circuit is installed on wiring board solder side or installation separately with it when making, avoid the long-time testing of the utility model, and transformer heating itself influences the accurate method that environment temperature detects, thereby causes sensitivity to reduce.
Be higher than environment temperature when measuring temperature, exhaust fan work is connected in the circuit control relay adhesive, and red led is bright, falls after rise to environment temperature after about 20 seconds when measuring temperature, and relay discharges, and exhaust fan is shut down and is in detected state, and green indicating lamp is bright.
The utility model is novel, works accurately and reliably long service life, cost Cheng Lian.Temperature detection, temperature difference comparison circuit has guaranteed that the utility model is not subjected to the influence (no matter winter, summer) of environment temperature, has consistent sensitivity;
Rc-delay circuit, in the time of can overcoming detected temperatures temperature circle point, it is frequent that dead electricity causes breaking-up to carry out relay.
The contrast accompanying drawing is also made an explanation to the utility model in conjunction with the embodiments below.
The automatic exhaust fan of embodiment, comprise exhaust fan, power transformer, resistance R 6, R7, heat-sensitive sensor RT1, the temperature detection comparison bridge that thermistor RT2 forms and etc. amplifier integrated circuit LA, B, switch three plate pipe VT and carry out the thermoswitch circuit that relay J is formed; During normal the detection, LA2 pin current potential is lower than 3 pin, and 1 pin is a high level, and switch triode VT is by not working; (the RT1 temperature is higher than RT2) RT1 resistance descends when detected temperatures reaches setting value, conducting, and 2 pin current potentials are higher than 3 pin, and 1 pin is a low level, switch triode VT conducting, exhaust fan work is connected in the relay adhesive, and the indication of cylinder look bright; The rc-delay circuit that R5, C4, LB form, in the time of can avoiding the detected temperatures critical point, it is frequent that dead electricity causes breaking-up to carry out relay.
The temperature-sensitive element of embodiment adopts the CWF56 temperature-sensitive element, adopts LM353 etc. the amplifier integrated circuit, and switch triode VT adopts C9013.
Claims (1)
1, a kind of have an automatic exhaust fan that the temperature difference is relatively controlled, and comprises exhaust fan, power transformer, by the thermoswitch circuit that temperature-sensitive element, temperature detection, temperature difference comparison circuit, switch triode and execution relay are formed, and it is characterized in that:
1.1, be provided with the temperature comparison bridge of forming by heat-sensitive sensor and thermistor at the detection signal input of the testing circuit of thermoswitch circuit;
1.2, in the thermoswitch circuit, be provided with rc-delay circuit;
1.3, be provided with the temperature of forming by the adjustable resistance of heat-sensitive sensor and series connection with it at the detection signal input of the testing circuit of thermoswitch circuit and measure circuit in advance;
1.4, the power transformer of this circuit when making, it be installed on the wiring board solder side or install separately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97231022 CN2323300Y (en) | 1997-12-31 | 1997-12-31 | Automatic ventilating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97231022 CN2323300Y (en) | 1997-12-31 | 1997-12-31 | Automatic ventilating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2323300Y true CN2323300Y (en) | 1999-06-09 |
Family
ID=33943381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97231022 Expired - Fee Related CN2323300Y (en) | 1997-12-31 | 1997-12-31 | Automatic ventilating fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2323300Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286367A (en) * | 2016-10-12 | 2017-01-04 | 四川万康节能环保科技有限公司 | A kind of used in air exchange fan overcurrent protective energy-saving control circuit |
-
1997
- 1997-12-31 CN CN 97231022 patent/CN2323300Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286367A (en) * | 2016-10-12 | 2017-01-04 | 四川万康节能环保科技有限公司 | A kind of used in air exchange fan overcurrent protective energy-saving control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |