CN201096861Y - Blower break detection sensor - Google Patents
Blower break detection sensor Download PDFInfo
- Publication number
- CN201096861Y CN201096861Y CNU2007201514366U CN200720151436U CN201096861Y CN 201096861 Y CN201096861 Y CN 201096861Y CN U2007201514366 U CNU2007201514366 U CN U2007201514366U CN 200720151436 U CN200720151436 U CN 200720151436U CN 201096861 Y CN201096861 Y CN 201096861Y
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- crystal diode
- detecting sensor
- blower fan
- sensor device
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Abstract
The utility model discloses a blower circuit break detecting sensor device, which belongs to the household electric appliance detecting technology field. The utility model provides the blower circuit break detecting sensor device that the structure is simple, the loss is little, and the service life is long. The blower circuit break detecting sensor device is composed of a photoelectric coupler, a forward crystal diode network and a reverse crystal diode network. The blower circuit break detecting sensor device is characterized in that at least two crystal diodes are arranged in one direction, and one reverse crystal diode is arranged, which form an alternating current access network with a forward crystal diode. Two ends of the forward crystal diode network and the reverse crystal diode network are connected with a series circuit composed of a luminous end of the photoelectric coupler, and a current limiting resistor. The blower circuit break detecting sensor device has the advantages of simple structure, little loss, long service life, and stable and reliable performance. The blower circuit break detecting sensor device can be used as the alternative proposal of the prior sensor.
Description
Technical field:
The utility model discloses a kind of blower fan detecting sensor device that opens circuit, belong to household electrical appliance monitoring and detection technical field.
Background technology:
In the household electrical appliance, especially combustion gas class household electrical appliances, relatively stricter to the Working Status Monitoring of blower fan, requirement detects the duty of blower fan constantly, guarantees the operate as normal of system.
Before the utility model was made, what the sensor in the pick-up unit adopted was resistance in series in the blower fan loop, and the voltage drop that utilizes resistance to produce makes and drives the photoelectrical coupler conducting, produced and detected control signal, judged the blower fan duty by single-chip microcomputer.When the blower fan circuit breaker, detect control signal and disappear ALM.
The above-mentioned voltage drop that utilizes resistance to produce drives photoelectrical coupler, the dropping resistor heating, and the loss height, and also spoilage is also high.
Summary of the invention:
The utility model is in the pick-up unit of above-mentioned blower fan loop, and the problem of the too high and life-span deficiency of the dropping resistor spoilage of appearance provides a kind of simple in structure, and loss is little, the blower fan of the long service life detecting sensor that opens circuit.
Technical characterictic of the present utility model is to adopt crystal diode to replace resistor.Because the forward voltage drop of crystal diode is certain, and very little (about 0.7V), so loss is just low many, heating is light, and the electric current that allows to pass through is considerably beyond the blower fan working current value, from having solved the high problem of spoilage basically.
Below introduce structure of the present utility model in detail: be in the blower fan current supply circuit, forward and reverse crystal diode network of connecting, utilize the PN junction conduction voltage drop of diode, the dc voltage drop that produces, drive the luminous end of photoelectrical coupler, make the single-chip microcomputer pin produce high-low level accordingly and change, non-fault is arranged thereby judge the blower fan loop.
A kind of blower fan detecting sensor that opens circuit, forward and reverse crystal diode network of being gone into blower fan work loop by photoelectrical coupler and series connection constitutes, the quantity that it is characterized in that the crystal diode of one of them direction is two at least, and forward and reverse crystal diode network two ends link to each other with the series circuit that the luminous end and the current-limiting resistor of photoelectrical coupler constitute.
The described blower fan detecting sensor that opens circuit is characterized in that described forward crystal diode is 2 coupled in series at least, is advisable for preferred three.
The described blower fan detecting sensor that opens circuit, the quantity that it is characterized in that described reverse crystal diode (D4) is 1, with forward crystal diode (D1, D2, D3) reversed polarity formation in parallel alternating current path network.
The described blower fan detecting sensor that opens circuit is characterized in that described crystal diode (D1, D2, D3, D4) adopts the above face junction silicon commutation diode of commutated current 500mA, as 2CP33 series.
During the utility model work, in the blower fan control loop, when the time at the positive half cycle of sine wave, electric current flows through at least two crystal diodes and produces pressure drop, the light-emitting diodes pipe end of conducting photoelectrical coupler IC1, the controlled end of conducting photoelectrical coupler is given electric capacity E1 discharge again.When sine wave at negative half period the time, electric current flows through backward dioded, the not conducting of light-emitting diodes pipe end of photoelectrical coupler IC1, and the controlled end of photoelectrical coupler ends, and electric capacity E1 is by resistance R 1 charging.Next half cycle discharges again, because the velocity of discharge is much larger than charging rate, so the positive terminal voltage of electric capacity E1 maintains reduced levels, single-chip microcomputer is judged as low level, and the blower fan loop is normal.Cause the blower fan loop to disconnect if blower fan opens circuit etc., then photoelectrical coupler IC1 can conducting, and electric capacity just can not discharge, and the electric capacity anode will be kept high level, and single-chip microcomputer is judged as high level, the blower fan loop fault.
The utility model has the advantages that simple in structurely, loss is little, and long service life is stable and reliable for performance.Can be used as the replacement scheme of existing sensor.
Description of drawings:
Fig. 1 is the structural circuit figure of prior art,
Fig. 2 is structural circuit figure of the present utility model.
Embodiment:
Embodiment of the present utility model is referring to accompanying drawing.
Among the embodiment: the blower fan detecting sensor that opens circuit, the forward crystal diode (D1, D2, D3) and reverse crystal diode (D4) network of being gone into blower fan work loop by photoelectrical coupler IC1 and series connection constitute, the quantity that it is characterized in that the crystal diode of forward is two at least, and forward and reverse crystal diode network two ends are connected with the series circuit that luminous end and the current-limiting resistor R3 of photoelectrical coupler IC1 constitute.
The forward crystal diode is 2 or more coupled in series at least, is advisable with three.Too much may make the voltage amplitude of positive-negative half-cycle produce difference.
Oppositely the quantity of crystal diode (D4) is 1, with forward crystal diode (D1, D2, D3) reversed polarity formation in parallel alternating current path network.
Crystal diode D1, D2, D3 and D4 adopt the above face junction silicon commutation diode of commutated current 500mA, as 2CP33 series.
In the present embodiment blower fan control loop, series diode utilizes the PN junction conduction voltage drop of diode, and the luminous end of the voltage turn-on photoelectrical coupler of generation makes the single-chip microcomputer pin produce high-low level accordingly and changes, thereby judge the blower fan loop non-fault is arranged.In the blower fan control loop, when at sine wave at positive half cycle the time, electric current flows through diode D1, D2, D3, produces pressure drop, the light-emitting diodes pipe end of conducting photoelectrical coupler IC1, and the controlled end of conducting photoelectrical coupler is given electric capacity E1 discharge again; When sine wave at negative half period the time, electric current flows through diode D4, the not conducting of light-emitting diodes pipe end of photoelectrical coupler IC1, and the controlled end of photoelectrical coupler ends, and electric capacity E1 is by resistance R 1 charging.Next half cycle discharges again, because the velocity of discharge is much larger than charging rate, so the positive terminal voltage of electric capacity E1 maintains reduced levels, single-chip microcomputer is judged as low level, and the blower fan loop is normal.Cause the blower fan loop to disconnect if blower fan opens circuit etc., then photoelectrical coupler IC1 can conducting, and electric capacity just can not discharge, and the electric capacity anode will be kept high level, and single-chip microcomputer is judged as high level, the blower fan loop fault.
Claims (4)
1. blower fan detecting sensor that opens circuit, the forward crystal diode (D1, D2, D3) and reverse crystal diode (D4) network of being gone into blower fan work loop by photoelectrical coupler (IC1) and series connection constitute, the quantity that it is characterized in that the crystal diode of forward is two at least, and forward and reverse crystal diode network two ends are connected with the series circuit that the luminous end and the current-limiting resistor (R3) of photoelectrical coupler (IC1) constitute.
2. the blower fan according to claim 1 detecting sensor that opens circuit is characterized in that described forward crystal diode is 2 coupled in series at least, is advisable for preferred three.
3. the blower fan according to claim 1 detecting sensor that opens circuit, the quantity that it is characterized in that described reverse crystal diode (D4) is 1, with forward crystal diode (D1, D2, D3) reversed polarity formation in parallel alternating current path network.
4. the blower fan according to claim 1 detecting sensor that opens circuit is characterized in that described crystal diode (D1, D2, D3, D4) adopts the above face junction silicon commutation diode of commutated current 500mA, as 2CP33 series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201514366U CN201096861Y (en) | 2007-06-27 | 2007-06-27 | Blower break detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201514366U CN201096861Y (en) | 2007-06-27 | 2007-06-27 | Blower break detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201096861Y true CN201096861Y (en) | 2008-08-06 |
Family
ID=39923914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201514366U Expired - Lifetime CN201096861Y (en) | 2007-06-27 | 2007-06-27 | Blower break detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201096861Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343713A (en) * | 2014-01-20 | 2015-02-11 | 上海新时达电气股份有限公司 | Failure detection circuit of alternating current fan |
| CN113311230A (en) * | 2020-02-27 | 2021-08-27 | 成都纳能微电子有限公司 | Terminal impedance detection circuit |
-
2007
- 2007-06-27 CN CNU2007201514366U patent/CN201096861Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343713A (en) * | 2014-01-20 | 2015-02-11 | 上海新时达电气股份有限公司 | Failure detection circuit of alternating current fan |
| CN104343713B (en) * | 2014-01-20 | 2016-05-25 | 上海新时达电气股份有限公司 | The failure detector circuit of ac fan |
| CN113311230A (en) * | 2020-02-27 | 2021-08-27 | 成都纳能微电子有限公司 | Terminal impedance detection circuit |
| CN113311230B (en) * | 2020-02-27 | 2022-12-06 | 成都纳能微电子有限公司 | Terminal impedance detection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Mitsubishi Heavy Haier (Qingdao) Air-conditioning Co.,Ltd. Assignor: Qingdao Haier Science and Technology Co., Ltd.|haier group corporation Contract fulfillment period: 2009.5.26 to 2014.5.26 Contract record no.: 2009370000179 Denomination of utility model: Blower break detection sensor Granted publication date: 20080806 License type: Exclusive license Record date: 20090720 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.5.26 TO 2014.5.26; CHANGE OF CONTRACT Name of requester: MITSUBISHI HEAVY INDUSTRIES HAIRE( QINGDAO ) AIR C Effective date: 20090720 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080806 |
|
| CX01 | Expiry of patent term |