CN201335580Y - Current sampling defrosting circuit structure for condenser fan - Google Patents
Current sampling defrosting circuit structure for condenser fan Download PDFInfo
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- CN201335580Y CN201335580Y CNU2008202170613U CN200820217061U CN201335580Y CN 201335580 Y CN201335580 Y CN 201335580Y CN U2008202170613 U CNU2008202170613 U CN U2008202170613U CN 200820217061 U CN200820217061 U CN 200820217061U CN 201335580 Y CN201335580 Y CN 201335580Y
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Abstract
The utility model relates to a current sampling defrosting circuit structure for a condenser fan, which belongs to the technical field of intelligent and automatic defrosting for a heat pump air conditioner. The current sampling defrosting circuit structure is mainly formed by connecting a current mutual inductor for the condenser fan, a temperature sensor, a biasing resistor, a filter capacitor, a triode, a diode, a relay, a central processing unit and a four-way reversing valve through wires. The current mutual inductor for the condenser fan is used for measuring the current of an electric motor for the condenser fan, the voltage obtained through a rectifier diode, a filter capacitor and a resistor voltage divider is compared with the parameter set by the central processing unit IC to meet the condition of defrosting, the four-way reversing valve is turned on to enter in the defrosting program, the purpose that the defrosting is carried out if frost exists and vice versa is truly achieved and the heating efficiency can be improved.
Description
Technical field
The utility model relates to a kind of current sampling defrost circuit structure of condensation fan, specifically apply in cold and warm air heating radiator (heat pump air conditioner) the intelligent defrosting control system, the condensation fan motor running current size that is used for measuring cold and warm air heating radiator is carried out the intelligent automation frost, belongs to heat pump air conditioner intelligent automation frost technical field.
Background technology
At present in the air-cooled heat-pump air-conditioner group, in the winter running since environment temperature, humidity constantly change, the defrost of general air-cooled heat pump air-conditioning, all be to measure condenser coil temperature, condenser surface temperature, carry out defrost, so just brought some problems with the time interval of environment temperature difference and each defrost, under some operating modes, can cause the unclean situation of defrostization, the air-cooled heat pump air-conditioning be heated brought influence, people to feel situations such as heating effect difference.
Summary of the invention
The purpose of this utility model is to overcome the sordid weak point of above-mentioned defrostization, thereby provide a kind of current sampling defrost circuit structure of condensation fan, the electric current that changes in the time of can measuring the operation of condensation fan motor, the electric current of the many condensation fans of frosting is big, the electric current of the few condensation fan of frosting is few, can carry out intelligent defrosting according to the size of the electric current of condensation fan, and can improve efficient at the state of heating.
The technical scheme that provides according to the utility model, current sampling defrost circuit structure of condensation fan links to each other with the positive terminal of commutation diode by condensation fan current transformer secondary coil, the negative pole end of commutation diode links to each other with filter capacitor, first resistance, and the first resistance other end links to each other with second resistance, one end and links to each other with the RE2 pin of central processing unit after the dividing potential drop.Link to each other with the RA1 pin of central processing unit by indoor temperature transmitter, link to each other with the RA2 pin of central processing unit by outdoor temperature sensor, link to each other with the RA3 pin of central processing unit by the fin temperature sensor, linked to each other with the RA5 pin of central processing unit by exhaust gas temperature sensor, above temperature sensor is as each temperature sample point.RB6 pin by central processing unit links to each other with the 3rd biasing resistor, and the 3rd biasing resistor other end links to each other with first transistor base, colelctor electrode links to each other with first relay, one end, first relay, one end links to each other with power supply.RB5 pin by central processing unit links to each other with the 4th biasing resistor, the 4th biasing resistor other end links to each other with second transistor base, colelctor electrode links to each other with second relay, one end, the second relay other end links to each other with power supply, RB4 pin by central processing unit links to each other with the 5th biasing resistor, the 5th biasing resistor other end links to each other with the 3rd transistor base, colelctor electrode links to each other with the 3rd relay one end, the 3rd relay other end links to each other with power supply, RB3 pin by central processing unit links to each other with the 6th biasing resistor, the 6th biasing resistor other end links to each other with the 4th transistor base, and colelctor electrode links to each other with the 4th relay one end, the 4th relay other end links to each other with power supply.RB2 pin by central processing unit links to each other with the 7th biasing resistor, and the 7th biasing resistor other end links to each other with the 5th transistor base, colelctor electrode links to each other with the 5th relay one end, the 5th relay other end links to each other with power supply.RB1 pin by central processing unit links to each other with the 8th biasing resistor, and the 8th biasing resistor other end links to each other with the 6th transistor base, colelctor electrode links to each other with the 6th relay one end, the 6th relay other end links to each other with power supply.Link to each other with pressure fan high speed terminal by the normally opened contact of power firestreak through first relay, link to each other with pressure fan middling speed terminal by the normally opened contact of power firestreak through second relay, linked to each other with pressure fan low speed terminal by the normally opened contact of power firestreak through the 3rd relay, the pressure fan common port links to each other with zero-power line.Linked to each other with compressor wiring terminal by the normally opened contact of power firestreak through the 4th relay, the other end links to each other with zero-power line.Linked to each other with condensation fan one end by the normally opened contact of power firestreak through the 5th relay, other end string is crossed the condensation fan current transformer and is linked to each other with zero-power line.Linked to each other with four-way change-over valve one terminal by the normally opened contact of power firestreak through the 6th relay, the four-way change-over valve other end links to each other with zero-power line.
Compared with the prior art the utility model has the following advantages:
The utility model circuit structure is simple, reasonable, energy-conservation, cost is low; The electric current that changes in the time of can measuring the operation of condensation fan motor by condensation fan current transformer LC, the electric current of the many condensation fans of frosting is big, the electric current of the few condensation fan of frosting is few, size according to the electric current of condensation fan is carried out intelligent defrosting, so just can accomplish white defrost, the purpose of frostless not defrost.The data of measuring are correct, reliable, make the defrost program more comprehensively, and are more intelligent, broken through present heat pump air conditioner unclean function of defrostization under certain operating mode.After having increased this device, compared with similar products and can improve efficient at the state of heating.
Description of drawings
Fig. 1 is a cold and warm air heating radiator control system frame principle figure under the utility model user mode.
Fig. 2 is the utility model condensation fan current sampling defrost circuit theory diagrams.
The specific embodiment
Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described.
As shown in Figure 1: the cold and warm air heating radiator control system is made up of temperature sensor, central processing unit, pressure fan, condensation fan, compressor, condensation fan current sampling defrost circuit, four-way change-over valve, operation display (operation display panel) etc. under the user mode.The central processing unit output is connected with temperature sensor, pressure fan, condensation fan, compressor, condensation fan current sampling defrost circuit, four-way change-over valve, operation display (operation display panel) input by lead respectively, and power supply is connected with the central processing unit input by lead.
As shown in Figure 2: condensation fan current transformer LC secondary coil links to each other with the positive terminal of commutation diode D1, links to each other with the RE2 pin of central processing unit IC (PLC16C74) after the dividing potential drop that the negative pole end of commutation diode D1 links to each other with filter capacitor C1, first resistance R 1, first resistance R, 1 other end links to each other with second resistance R, 2 one ends.Link to each other with the RA1 pin of central processing unit IC by indoor temperature transmitter W1, link to each other with the RA2 pin of central processing unit IC by outdoor temperature sensor W2, link to each other with the RA3 pin of central processing unit IC by fin temperature sensor W3, linked to each other with the RA5 pin of central processing unit IC by exhaust gas temperature sensor W4, above temperature sensor is as each temperature sample point.RB6 pin by central processing unit IC links to each other with the 3rd biasing resistor R3, and the 3rd biasing resistor R3 other end links to each other with the first triode BG1 base stage, colelctor electrode links to each other with the first relay K A1, one end, the first relay K A1 other end links to each other with power supply VCC, emitter stage links to each other with ground (GND).RB5 pin by central processing unit IC links to each other with the 4th biasing resistor R4, and the 4th biasing resistor R4 other end links to each other with the second triode BG2 base stage. and colelctor electrode links to each other with the second relay K A2, one end, the second relay K A2 other end links to each other with power supply VCC, emitter stage links to each other with ground (GND).RB4 pin by central processing unit IC links to each other with the 5th biasing resistor R5, the 5th biasing resistor R5 other end links to each other with the 3rd triode BG3 base stage. and colelctor electrode links to each other with the 3rd relay K A3 one end, and the 3rd relay K A3 other end links to each other with power supply VCC, emitter stage links to each other with ground (GND).RB3 pin by central processing unit IC links to each other with the 6th biasing resistor R6, the 6th biasing resistor R6 other end links to each other with the 4th triode BG4 base stage, and colelctor electrode links to each other with the 4th relay K A4 one end, the 4th relay K A4 other end links to each other with power supply VCC, emitter stage links to each other with ground (GND).RB2 pin by central processing unit IC links to each other with the 7th biasing resistor R7, and the 7th biasing resistor R7 other end links to each other with the 5th triode BG5 base stage, colelctor electrode links to each other with the 5th relay K A5 one end, the 5th relay K A5 other end links to each other with power supply VCC, emitter stage links to each other with ground (GND).RB1 pin by central processing unit IC links to each other with the 8th biasing resistor R8, and the 8th biasing resistor R8 other end links to each other with the 6th triode BG6 base stage, colelctor electrode links to each other with the 6th relay K A6 one end, the 6th relay K A6 other end links to each other with power supply VCC, emitter stage links to each other with ground (GND).Link to each other with pressure fan MF1 high speed terminal H through the normally opened contact of the first relay K A1 by power firestreak L, link to each other with pressure fan MF1 middling speed terminal M through the normally opened contact of the second relay K A2 by power firestreak L, linked to each other with pressure fan MF1 low speed terminal M by the normally opened contact of power firestreak through the 3rd relay K A3, pressure fan MF1 common port links to each other with zero-power line N.Linked to each other with compressor MC binding post through the normally opened contact of the 4th relay K A4 by power firestreak L, the other end links to each other with zero-power line N.Linked to each other with condensation fan MF2 one end through the normally opened contact of the 5th relay K A5 by power firestreak L, other end string is crossed the condensation fan current transformer and is linked to each other with zero-power line N.Linked to each other with four-way change-over valve DL one terminal through the normally opened contact of the 6th relay K A6 by power firestreak L, the four-way change-over valve DL other end links to each other with zero-power line N.
During work, by operation display panel by artificial selection pressure fan MF1 top gear key, differentiate through central processing unit IC then, be that RB6 is output as high level, make the first triode BG1 conducting through the 3rd biasing resistor R3, the first relay K A1 adhesive makes the normally opened contact (closure) of power firestreak L through the first relay K A1, pressure fan top gear terminal gets electric, and pressure fan MF1 moves at top gear.By operation display panel by artificial selection pressure fan MF1 mid ranger key, differentiate through central processing unit IC then, be that RB5 is output as high level, make the 3rd triode BG2 conducting through the 4th biasing resistor R4, the second relay K A2 adhesive, make the normally opened contact (closure) of power firestreak L through the second relay K A2, pressure fan MF1 mid ranger terminal gets electric, and pressure fan MF1 moves at mid ranger.By operation display panel by artificial selection pressure fan MF1 low or first gear key, differentiate through central processing unit IC then, be that RB4 is output as high level, make the 3rd triode BG3 conducting through the 5th biasing resistor R5, the 3rd relay K A3 adhesive, make the normally opened contact (closure) of power firestreak L through the 3rd relay K A3, pressure fan MF1 low or first gear terminal gets electric, and pressure fan MF1 moves at low or first gear.By operation display panel by the artificial selection start key, differentiate through central processing unit IC then, indoor temperature transmitter W1 measures temperature and is lower than design temperature, be that RB3 is output as high level, make the 4th triode BG4 conducting through the 6th biasing resistor R6, the 4th relay K A4 adhesive makes the normally opened contact (closure) of power firestreak L through the 4th relay K A4, compressor MC operation.Exhaust gas temperature sensor W4 measures temperature and is higher than design temperature; be that RB3 is output as low level; through the 6th biasing resistor R6 the 4th triode BG4 is ended; the 4th relay K A4 discharges; make the normally opened contact (disconnection) of power firestreak L through the 4th relay K A4; compressor is out of service, shields.
Realize the condition of defrost:
Outdoor temperature sensor W2≤5 ℃
Outdoor temperature W2-fin temperature W3 〉=7 ℃
Each defrost compartment 〉=30 minutes
Condensation fan motor current I0 〉=Ii (this electric current is to differentiate automatically by central processing unit).
Satisfy above 4 conditions simultaneously, carry out computing relatively by central processing unit IC after, promptly RB1 is output as high level, makes the 6th triode BG6 conducting through the 8th biasing resistor R8, makes the 6th triode
Sound is changed in KA6 adhesive, four-way change-over valve DL energising, makes the refrigeration system of cold and warm air heating radiator unit enter the defrost state.
Realize the defrost termination condition:
Defrost duration 〉=10 minute
Fin temperature W3 〉=8 ℃
As long as more than satisfy one of them condition, withdraw from the defrost program and enter the state that normally heats.
Claims (1)
1, a kind of current sampling defrost circuit structure of condensation fan, it is characterized in that current transformer LC secondary coil links to each other with the positive terminal of commutation diode (D1), the negative pole end of commutation diode (D1) links to each other with filter capacitor (C1), first resistance (R1), and first resistance (R1) other end links to each other with second resistance (R2) end and links to each other with the RE2 pin of central processing unit (IC) after the dividing potential drop; Indoor temperature transmitter (W1) links to each other with the RA1 pin of central processing unit (IC), outdoor temperature sensor (W2) links to each other with the RA2 pin of central processing unit (IC), fin temperature sensor (W3) links to each other with the RA3 pin of central processing unit (IC), exhaust gas temperature sensor (W4) links to each other with the RA5 pin of central processing unit (IC), the RB6 pin of central processing unit (IC) links to each other with the 3rd biasing resistor (R3), the 3rd biasing resistor (R3) other end links to each other with first triode (BG1) base stage, colelctor electrode links to each other with first relay (KA1) end, first relay (KA1) other end links to each other with power supply (VCC), the RB5 pin of central processing unit (IC) links to each other with the 4th biasing resistor (R4), the 4th biasing resistor (R4) other end links to each other with second triode (BG2) base stage. and colelctor electrode links to each other with second relay (KA2) end, second relay (KA2) other end links to each other with power supply VCC, the RB4 pin of central processing unit (IC) links to each other with the 5th biasing resistor (R5), the 5th biasing resistor (R5) other end links to each other with the 3rd triode (BG3) base stage, colelctor electrode links to each other with the 3rd relay (KA3) end, the 3rd relay (KA3) other end links to each other with power supply (VCC), the RB3 pin of central processing unit (IC) links to each other with the 6th biasing resistor (R6), the 6th biasing resistor (R6) other end links to each other with the 4th triode (BG4) base stage, colelctor electrode links to each other with the 4th relay (KA4) end, the 4th relay K A4 other end links to each other with power supply VCC, the RB2 pin of central processing unit (IC) links to each other with the 7th biasing resistor (R7), the 7th biasing resistor (R7) other end links to each other with the 5th triode (B65) base stage, colelctor electrode links to each other with the 5th relay (KA5) end, the 5th relay (KA5) other end links to each other with power supply (VCC), the RB1 pin of central processing unit (IC) links to each other with the 8th biasing resistor (R8), the 8th biasing resistor (R8) other end links to each other with the 6th triode (BG6) base stage, colelctor electrode links to each other with the 6th relay (KA6) end, the 6th relay (KA6) other end links to each other with power supply (VCC), power firestreak (L) links to each other with pressure fan (MF1) high speed terminal (H) through the normally opened contact of first relay (KA1), power firestreak (L) links to each other with pressure fan (MF1) middling speed terminal (M) through the normally opened contact of second relay (KA2), power firestreak links to each other with pressure fan (MF1) low speed terminal (M) through the normally opened contact of the 3rd relay (KA3), pressure fan (MF1) common port links to each other with zero-power line (N), power firestreak (L) links to each other with compressor (MC) binding post through the normally opened contact of the 4th relay (KA4), the other end links to each other with zero-power line (N), power firestreak (L) links to each other with condensation fan (MF2) end through the normally opened contact of the 5th relay (KA5), other end string is crossed condensation fan (MF2) current transformer and is linked to each other with zero-power line (N), power firestreak (L) links to each other with four-way change-over valve (DL) terminal through the normally opened contact of the 6th relay (KA6), and four-way change-over valve (DL) other end links to each other with zero-power line (N).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202170613U CN201335580Y (en) | 2008-11-26 | 2008-11-26 | Current sampling defrosting circuit structure for condenser fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202170613U CN201335580Y (en) | 2008-11-26 | 2008-11-26 | Current sampling defrosting circuit structure for condenser fan |
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| CN201335580Y true CN201335580Y (en) | 2009-10-28 |
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| CNU2008202170613U Expired - Fee Related CN201335580Y (en) | 2008-11-26 | 2008-11-26 | Current sampling defrosting circuit structure for condenser fan |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925675A (en) * | 2014-03-27 | 2014-07-16 | 广东美的制冷设备有限公司 | Air conditioner and judgment method and device for air conditioner in defrost mode |
| CN104748316A (en) * | 2015-03-31 | 2015-07-01 | 广东美的制冷设备有限公司 | Air conditioner and control method and device for compressor motor in air conditioner |
| CN110160291A (en) * | 2018-02-06 | 2019-08-23 | 中山深宝电器制造有限公司 | A kind of low temperature heating machine defrosting control program |
| CN111947349A (en) * | 2019-05-14 | 2020-11-17 | 广东万博电气有限公司 | Defrosting control method, defrosting control system and air source heat pump device |
-
2008
- 2008-11-26 CN CNU2008202170613U patent/CN201335580Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925675A (en) * | 2014-03-27 | 2014-07-16 | 广东美的制冷设备有限公司 | Air conditioner and judgment method and device for air conditioner in defrost mode |
| CN103925675B (en) * | 2014-03-27 | 2016-08-17 | 广东美的制冷设备有限公司 | Air-conditioning enters the determination methods of defrosting mode, judgment means and air-conditioning |
| CN104748316A (en) * | 2015-03-31 | 2015-07-01 | 广东美的制冷设备有限公司 | Air conditioner and control method and device for compressor motor in air conditioner |
| CN104748316B (en) * | 2015-03-31 | 2017-06-06 | 广东美的制冷设备有限公司 | The control method of compressor electric motor, control device in air-conditioner and air-conditioner |
| CN110160291A (en) * | 2018-02-06 | 2019-08-23 | 中山深宝电器制造有限公司 | A kind of low temperature heating machine defrosting control program |
| CN110160291B (en) * | 2018-02-06 | 2021-04-13 | 中山深宝电器制造有限公司 | Defrosting control scheme for low-temperature heating machine |
| CN111947349A (en) * | 2019-05-14 | 2020-11-17 | 广东万博电气有限公司 | Defrosting control method, defrosting control system and air source heat pump device |
| CN111947349B (en) * | 2019-05-14 | 2023-05-12 | 广东万和电气有限公司 | Defrosting control method, defrosting control system and air source heat pump device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20101126 |