CN101435642B - Current sampling defrost circuit structure of condensation fan - Google Patents
Current sampling defrost circuit structure of condensation fan Download PDFInfo
- Publication number
- CN101435642B CN101435642B CN 200810244725 CN200810244725A CN101435642B CN 101435642 B CN101435642 B CN 101435642B CN 200810244725 CN200810244725 CN 200810244725 CN 200810244725 A CN200810244725 A CN 200810244725A CN 101435642 B CN101435642 B CN 101435642B
- Authority
- CN
- China
- Prior art keywords
- links
- relay
- triode
- processing unit
- pic16c74
- 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
Images
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a current sampling and defrosting circuit structure of a condensation fan and belongs to the field of intelligent automatic defrosting technology of a heat pump air conditioner. The circuit structure mainly comprises a current mutual inductor of the condensation fan, a temperature sensor, a biasing resistor, a filtering capacitor, an audion, a diode, a relay, a central processor and a four-way reversing valve connected through a conducting wire. The current size of an electromotor of the condensation fan is measured through the current mutual inductor of the condensation fan; voltage obtained through the pressure shunting of the commutation diode, the filtering capacitor and the resistor is compared with a parameter set by a central processor IC; and if the defrosting condition is met, the four-way reversing valve is switched on and enters a defrosting program, thereby really achieving defrosting with frost and non-frosting without frost and improving the heating efficiency.
Description
Technical field
The present invention 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 objective of the invention 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.
According to technical scheme provided by the invention, 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 PIC16C74 central processing unit after the dividing potential drop.Link to each other with the RA1 pin of PIC16C74 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 PIC16C74 central processing unit by the fin temperature sensor, linked to each other with the RA5 pin of PIC16C74 central processing unit by exhaust gas temperature sensor, above temperature sensor is as each temperature sample point.RB6 pin by the PIC16C74 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, and first transistor collector links to each other the first transistor emitter ground connection with first relay, one end; First relay, one end links to each other with power supply.RB5 pin by the PIC16C74 central processing unit links to each other with the 4th biasing resistor, and the 4th biasing resistor other end links to each other with second transistor base, and second transistor collector links to each other the second transistor emitter ground connection with second relay, one end; The second relay other end links to each other with power supply, RB4 pin by the PIC16C74 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, and the 3rd transistor collector links to each other the 3rd transistor emitter ground connection with the 3rd relay one end; The 3rd relay other end links to each other with power supply, RB3 pin by the PIC16C74 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 the 4th transistor collector links to each other the 4th transistor emitter ground connection with the 4th relay one end; The 4th relay other end links to each other with power supply.RB2 pin by the PIC16C74 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, and the 5th transistor collector links to each other the 5th transistor emitter ground connection with the 5th relay one end; The 5th relay other end links to each other with power supply.RB1 pin by the PIC16C74 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, and the 6th transistor collector links to each other the 6th transistor emitter ground connection 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 present invention has the following advantages:
Circuit structure of the present invention 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, and making program more comprehensively, and is 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 user mode of the present invention.
Fig. 2 is condensation fan current sampling defrost circuit theory diagrams of the present invention.
The specific embodiment
Embodiment during following the present invention incites 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.PIC16C74 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 PIC16C74 central processing unit IC 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 PIC16C74 central processing unit IC by indoor temperature transmitter W1, link to each other with the RA2 pin of PIC16C74 central processing unit IC by outdoor temperature sensor W2, link to each other with the RA3 pin of PIC16C74 central processing unit IC by fin temperature sensor W3, linked to each other with the RA5 pin of PIC16C74 central processing unit IC by exhaust gas temperature sensor W4, above temperature sensor is as each temperature sample point.RB6 pin by PIC16C74 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 the first triode BG1 base stage, the first triode BG1 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, and the first triode BG1 emitter stage links to each other with ground (GND).RB5 pin by PIC16C74 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 the second triode BG2 base stage, the second triode BG2 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, and the second triode BG2 emitter stage links to each other with ground (GND).RB4 pin by PIC16C74 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, the 3rd triode BG3 colelctor electrode links to each other with the 3rd relay K A3 one end, the 3rd relay K A3 other end links to each other with power supply VCC, and the 3rd triode BG3 emitter stage links to each other with ground (GND).RB3 pin by PIC16C74 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, the 4th triode BG4 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, and the 4th triode BG4 emitter stage links to each other with ground (GND).RB2 pin by PIC16C74 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 BG5 base stage, the 5th triode BG5 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, and the 5th triode BG5 emitter stage links to each other with ground (GND).RB1 pin by PIC16C74 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, the 6th triode BG6 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, and the 6th triode BG6 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 I 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 PIC16C74 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 PIC16C74 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 PIC16C74 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 PIC16C74 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, after carrying out computing relatively by central processing unit IC, be that RB1 is output as high level, make the 6th triode BG6 conducting through the 8th biasing resistor R8, make the 6th triode KA6 adhesive, four-way change-over valve DL energising change sound, make 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. 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 a filter capacitor (C1) and first resistance (R1) end respectively, filter capacitor (C1) other end links to each other with current transformer (LC) secondary coil and second resistance (R2) other end respectively, and ground connection; First resistance (R1) other end links to each other with second resistance (R2) end and links to each other with the RE2 pin of PIC16C74 central processing unit (IC) after the dividing potential drop; Indoor temperature transmitter (W1) links to each other with the RA1 pin of PIC16C74 central processing unit (IC), outdoor temperature sensor (W2) links to each other with the RA2 pin of PIC16C74 central processing unit (IC), fin temperature sensor (W3) links to each other with the RA3 pin of PIC16C74 central processing unit (IC), exhaust gas temperature sensor (W4) links to each other with the RA5 pin of PIC16C74 central processing unit (IC), the RB6 pin of PIC16C74 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, first triode (BG1) colelctor electrode links to each other with first relay (KA1) end, first triode (BG1) grounded emitter; First relay (KA1) other end links to each other with power supply (VCC), the RB5 pin of PIC16C74 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, second triode (BG2) colelctor electrode links to each other with second relay (KA2) end, second triode (BG2) grounded emitter; Second relay (KA2) other end links to each other with power supply (VCC), the RB4 pin of PIC16C74 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, the 3rd triode (BG3) colelctor electrode links to each other with the 3rd relay (KA3) end, the 3rd triode (BG3) grounded emitter; The 3rd relay (KA3) other end links to each other with power supply (VCC), the RB3 pin of PIC16C74 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, the 4th triode (BG4) colelctor electrode links to each other with the 4th relay (KA4) end, the 4th triode (BG4) grounded emitter; The 4th relay (KA4) other end links to each other with power supply (VCC), the RB2 pin of PIC16C74 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 (BG5) base stage, the 5th triode (BG5) colelctor electrode links to each other with the 5th relay (KA5) end, the 5th triode (BG5) grounded emitter; The 5th relay (KA5) other end links to each other with power supply (VCC), the RB1 pin of PIC16C74 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, the 6th triode (BG6) colelctor electrode links to each other with the 6th relay (KA6) end, the 6th triode (BG6) grounded emitter; 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 (I) 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 |
|---|---|---|---|
| CN 200810244725 CN101435642B (en) | 2008-11-26 | 2008-11-26 | Current sampling defrost circuit structure of condensation fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810244725 CN101435642B (en) | 2008-11-26 | 2008-11-26 | Current sampling defrost circuit structure of condensation fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101435642A CN101435642A (en) | 2009-05-20 |
| CN101435642B true CN101435642B (en) | 2011-09-14 |
Family
ID=40710210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810244725 Expired - Fee Related CN101435642B (en) | 2008-11-26 | 2008-11-26 | Current sampling defrost circuit structure of condensation fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101435642B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456859B (en) * | 2013-09-12 | 2017-09-26 | 珠海格力电器股份有限公司 | Air conditioner and its defrosting control method and device |
| CN106288134A (en) * | 2015-06-03 | 2017-01-04 | 陕西华汇能源科技有限公司 | A kind of outdoor machine of air-conditioner defrost detection method and device |
| CN105157161B (en) * | 2015-07-07 | 2018-01-23 | 珠海格力电器股份有限公司 | Detect the method and device of air-conditioning frosting |
| CN107044716B (en) * | 2017-04-21 | 2019-10-01 | 广东美的暖通设备有限公司 | Air-conditioner defrosting control method, air-conditioning and computer readable storage medium |
| CN107270479A (en) * | 2017-06-19 | 2017-10-20 | 广东美的暖通设备有限公司 | The control method and control system of outdoor fan of air conditioner |
| 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 |
| CN110986229A (en) * | 2019-12-23 | 2020-04-10 | 孚莱美科(江苏)环境科技有限公司 | Defrosting control method and device of air source heat pump system and air conditioning system |
-
2008
- 2008-11-26 CN CN 200810244725 patent/CN101435642B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101435642A (en) | 2009-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101435642B (en) | Current sampling defrost circuit structure of condensation fan | |
| CN2499739Y (en) | Alarm device for air filler net blocking | |
| CN105276758A (en) | Method and device for estimating power consumption of variable-frequency air conditioner | |
| CN104154604B (en) | Outdoor unit control circuit of variable frequency air conditioner | |
| CN201335580Y (en) | Current sampling defrosting circuit structure for condenser fan | |
| CN201425359Y (en) | Auxiliary electric heating device | |
| CN103199496B (en) | Motor speed regulating voltage Vsp cut-off circuit of air conditioning system of brushless motor | |
| CN201072272Y (en) | Heat pump defrosting control device of cooling and heating blower | |
| CN201589373U (en) | Electricity-saving control device for air conditioner | |
| CN103307818A (en) | Air-conditioning system and liquid impact prevention and control method thereof | |
| CN101539323A (en) | Automatic switching method of heat pipe cooling system and air conditioning equipment and device thereof | |
| CN204678605U (en) | A kind of air-conditioner control system and air-conditioning | |
| CN103199776A (en) | Circuit for switching fixed rotating speed and adjustable rotating speed of outdoor direct-current motor of air-conditioner | |
| CN204006408U (en) | A kind of air-conditioner outdoor unit | |
| CN101457970B (en) | Three-proof air conditioner positive-pressure control circuit structure | |
| CN105135614A (en) | Vehicle air conditioner anti-frosting control method | |
| CN102538149A (en) | Overheat protection control method and overheat protection control device for air conditioner | |
| CN203151077U (en) | Motor speed adjusting voltage Vsp shutdown circuit of brushless motor air-conditioning system | |
| CN202254624U (en) | Heater control system of frostless refrigerator | |
| CN2844797Y (en) | Hot-gas bypass type residential central air conditioning | |
| CN201373529Y (en) | Tri-proof air conditioning positive pressure control circuit structure | |
| CN202770644U (en) | Railway passenger train air-conditioning temperature-sensing head simulation device | |
| CN202600061U (en) | Device for testing refrigerator defrosting timer | |
| CN205641353U (en) | Energy saving air -conditioning control system based on linear drive circuit | |
| CN205717738U (en) | A kind of air conditioner energy conservation control system based on A/D change-over circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20110914 Termination date: 20121126 |