CN101988839B - Rime ice detection device, heat-pump air-conditioner and defrosting control method thereof - Google Patents
Rime ice detection device, heat-pump air-conditioner and defrosting control method thereof Download PDFInfo
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- CN101988839B CN101988839B CN200910041626A CN200910041626A CN101988839B CN 101988839 B CN101988839 B CN 101988839B CN 200910041626 A CN200910041626 A CN 200910041626A CN 200910041626 A CN200910041626 A CN 200910041626A CN 101988839 B CN101988839 B CN 101988839B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence of frost or condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/11—Sensor to detect if defrost is necessary
- F25B2700/111—Sensor to detect if defrost is necessary using an emitter and receiver, e.g. sensing by emitting light or other radiation and receiving reflection by a sensor
Abstract
A rime ice detection device of the invention comprises a light emitting device and a light receiving device; a heat-pump air-conditioner comprises a rime ice detection device installed on a circulation system, the rime ice detection device comprises a light emitting device and a light receiving device, the rime ice detection device is connected with a control component circuit, and converts a detected light signal into an electric signal to transmit the signal to a control component. The rime ice detection device uses the rime ice as barriers of a light beam channel, after shading and refracting the light beam and changing intensity of the light, an output signal of the light receiving device is changed. The rime ice detection device can be used for aspects, such as defrosting control of refrigerators, rime ice volume control and the like. The rime ice is detected by the rime ice detection device or dual-detection of a pipeline temperature sensor and the rime ice detection device. The defrosting control method of the heat-pump air-conditioner of the invention controls the rime ice detection device to detect the circulation system, so that frosting or not can be accurately judged, frost can be effective removed, and heating efficiency of the air-conditioner is improved.
Description
Technical field
The invention belongs to refrigeration technology field, relate in particular to a kind of frost pick-up unit, heat pump type air conditioner and defrosting control method thereof.The present invention relates to the Defrost method of heat pump type air conditioner, have can sensing chamber's outer heat-exchanger on frosting situation and can start the method for defrost operation with the heating work pattern.
Background technology
The defrosting of prior art air conditioner control all is to adopt the control that defrosts of sensor frosting situation such as temperature, pressure, wind speed, rotating speed indirectly.In implementation process, because the influence of factors such as system and environment, actual and theory differs bigger, or defrosting not exclusively, or defrosting in advance, and this all reduces the heat pump heating efficiency.
For example; In traditional heat pump type air conditioner; Adopt the temperature sensor on the outdoor heat converter to judge the frosting situation on the outdoor heat converter; Temperature sensor starts defrost operation on the outdoor heat converter with being arranged on, and simultaneously, defrosting time also is to finish to confirm automatically through sensing chamber's Outer Tube temperature or through detecting the schedule time.In this Defrost method, the phenomenon of mistake defrosting appears through regular meeting, promptly in fact on the outdoor heat converter not frost form or do not have frost to eliminate after also continue defrosting.In order to address the above problem; A lot of companies have all proposed some defrosting modes; But all well do not address this problem; Like invention disclosed patented claim CN1164006A on the Chinese patent communique, in open day on November 5th, 1997, the applicant is Korea S LG Electronics Inc.; This patented claim discloses a kind of Defrost method of heat pump type air conditioner; Comprise: be used for the first temperature survey step of the temperature gap TD1 between measuring chamber interior conduit temperature T E1 and the room temperature TR1 after heating operation starts constantly through ml minute, be used for measuring chamber interior conduit temperature T E2 with through the second temperature survey step of the temperature gap TD2 between the room temperature TR2 after m2 minute be used for each temperature of measuring the first and second temperature survey steps and reference value compares and the defrosting step of detection frosting.This application for a patent for invention is through under the heating operation pattern; Rely on interior conduit temperature sensor and indoor temperature transmitter to start defrost operation; Defrosting time is through after carrying out difference respectively between two groups of interior conduit temperature that measure two different time and the indoor temperature; Difference compares with a certain setting value then once more, confirms that this invention of defrosting time will obtain different setting defrosting time sections through setting different fiducial values; So just changed the certain problem of time in traditional Defrost method; The degree of accuracy of defrosting is increased, but still do not solve the heat pump type air conditioner defrosting time, automatically the problem of allotment along with the frosting situation on the outdoor heat converter.
Summary of the invention
The object of the present invention is to provide a kind of frost pick-up unit, heat pump type air conditioner and defrosting control method thereof, can further improve accuracy, can in time get into and withdraw from Defrost operation, improve the heat pump heating efficiency the judgement of frosting.
The present invention realizes through following technical scheme:
The frost pick-up unit; Include luminescent device and light receiving element; By pedestal as support component; Said pedestal is provided with luminescent device installation portion, light receiving element installation portion and printed-wiring board (PWB) installation portion, and said luminescent device installation portion, light receiving element installation portion and printed-wiring board (PWB) installation portion are semi-enclosed cavity; Luminescent device and light receiving element are fixed on the pedestal in the corresponding cavity through printed-wiring board (PWB) (63); The lead transmission of electric signal through being connected with printed-wiring board (PWB).
Heat pump type air conditioner includes control assembly, outdoor heat exchanger, outdoor fan, compressor, four-way valve, indoor heat exchanger, indoor fan and restriction device; Said outdoor heat exchanger, compressor, four-way valve, restriction device and indoor heat exchanger are connected to form the circulation system of sealing through refrigerant pipe, and refrigerant circulates in the said circulation system; Wherein, said heat pump type air conditioner also includes the frost pick-up unit that is installed on the circulation system, and said frost pick-up unit is connected with the control assembly circuit, and converts detected light signal into electric signal and be transferred to control assembly.
The defrosting control method of above-mentioned heat pump type air conditioner, wherein, the air conditioner heat-production operation is after t1 minute, and the frost pick-up unit promptly detects the circulation system; When the frost pick-up unit detected the circulation system frost is arranged, air conditioner transferred the Defrost operation pattern to; Behind air conditioner Defrost operation t3 minute, the frost pick-up unit detects the circulation system; When the frost pick-up unit detects the circulation system when frostless, air conditioner transfers the heating operation pattern to.
The defrosting control method of above-mentioned heat pump type air conditioner, wherein, when the frost pick-up unit detected the circulation system frost is arranged, the single-chip microcomputer of control assembly was through further analyzing the pipeline variation of temperature, and confirming has frost, air conditioner to transfer the Defrost operation pattern to.
The defrosting control method of above-mentioned heat pump type air conditioner, wherein, when the frost pick-up unit detects the circulation system when frostless, the single-chip microcomputer of control assembly is through further analyzing the pipeline variation of temperature, confirms that frost changed, and air conditioner transfers the heating operation pattern to.
Beneficial effect of the present invention is following:
Heat pump type air conditioner of the present invention; Owing to include the frost pick-up unit that is installed on the circulation system; Said frost pick-up unit includes luminescent device and light receiving element; Said frost pick-up unit is connected with the control assembly circuit, and converts detected light signal into electric signal and be transferred to control assembly.The principle of work of frost pick-up unit is: utilize the barrier of frost as beam channel, through to the blocking, reflect of light beam, change light intensity, light receiving element output signal is changed.This device can be applicable to aspects such as the defrosting control, the control of frost volume of refrigerating appliance.Be contained in the position that needs to detect frost during application.Detect through the frost pick-up unit, or through pipeline temperature sensor and frost pick-up unit double check.The defrosting control method of heat pump type air conditioner of the present invention uses the frost pick-up unit that the circulation system is detected, and effectively sets the condition that heat pump type air conditioner got into and withdrawed from defrosting mode.Can accurately whether judge frosting, effectively defrost, improve air conditioner heat pump heating efficiency.Simultaneously, make the heat pump type air conditioner defrosting time along with the frosting situation on the outdoor heat converter, allotment automatically prevents to miss the generation of the phenomenon that defrosts.
Description of drawings
Fig. 1 is defrosting control method control mode one schematic diagram of heat pump type air conditioner of the present invention;
Fig. 2 is defrosting control method control mode two schematic diagrams of heat pump type air conditioner of the present invention;
Fig. 3 is defrosting control method control mode one process flow diagram of heat pump type air conditioner of the present invention;
Fig. 4 is defrosting control method control mode two process flow diagrams of heat pump type air conditioner of the present invention;
Fig. 5 is embodiment one circulation system principle schematic of heat pump type air conditioner of the present invention;
Fig. 6 is the embodiment two-circulation system principle schematic of heat pump type air conditioner of the present invention;
Fig. 7 is a frost pick-up unit structure exploded perspective view of the present invention;
Fig. 8 is a frost pick-up unit mounting structure synoptic diagram of the present invention;
Fig. 9 is a frost pick-up unit principle of work synoptic diagram of the present invention;
Figure 10 is the base structure synoptic diagram of frost pick-up unit of the present invention;
Figure 11 is the printed-wiring board (PWB) installation portion structure synoptic diagram of the pedestal of frost pick-up unit of the present invention;
Figure 12 is a frost pick-up unit inner structure synoptic diagram of the present invention;
Figure 13 is a frost pick-up unit sectional structure synoptic diagram of the present invention;
Figure 14 is a frost pick-up unit perspective view of the present invention.
Description of reference numerals:
1, compressor, 2, four-way valve, 3, outdoor heat exchanger, 4, restriction device, 5, indoor heat exchanger, 6, the frost pick-up unit; 7, temperature sensor, 8, the frosting body, 9, light beam, 61, luminescent device, 62, light receiving element, 63, printed-wiring board (PWB); 64, lead, 65, pedestal, 66, guard, 67, geometrical clamp, 621, light hole; 651, luminescent device installation portion, 652, the light receiving element installation portion, 653, the printed-wiring board (PWB) installation portion, 654, installed surface, 81, frost.
Embodiment
The present invention discloses a kind of heat pump type air conditioner, like Fig. 5,6,7, includes control assembly, outdoor heat exchanger 3, outdoor fan, compressor 1, four-way valve 2, indoor heat exchanger 5, indoor fan and restriction device 4; Said outdoor heat exchanger 3, compressor 1, four-way valve 2, restriction device 4 and indoor heat exchanger 5 are connected to form the circulation system of sealing through refrigerant pipe, and refrigerant circulates in the said circulation system; Wherein, Said heat pump type air conditioner also includes the frost pick-up unit 6 that is installed on the circulation system; Said frost pick-up unit 6 includes luminescent device 61 and light receiving element 62; Said frost pick-up unit 6 is connected with said control assembly circuit, and converts detected light signal into electric signal and be transferred to said control assembly.
Like Fig. 7,8,10,11,12,13,14; Said frost pick-up unit 6 by pedestal 65 as support component; Said pedestal 65 is provided with luminescent device installation portion 651, light receiving element installation portion 652 and printed-wiring board (PWB) installation portion 653, and said luminescent device installation portion 651, light receiving element installation portion 652 and printed-wiring board (PWB) installation portion 653 are semi-enclosed cavity; Luminescent device 61 and light receiving element 62 are fixed on the pedestal 65 in the corresponding cavity through printed-wiring board (PWB) 63; Lead 64 transmission of electric signal through being connected with printed-wiring board (PWB) 63.
Said light receiving element 62 is a light receiving surface towards the one side of luminescent device 61, and said pedestal 65 is provided with light hole 621 near the wall at light receiving surface place; Said frost pick-up unit 6 also includes the guard 66 and geometrical clamp 67 of proofing dust and protecting, and guard 66 is positioned at outside the pedestal 65, is buckled in position between said luminescent device installation portion 651 and the light receiving element installation portion 652; Geometrical clamp 67 is half-twist " U " shape, is clamped on the depression position of said luminescent device installation portion 651 and light receiving element installation portion 652 belows.As shown in Figure 9, pedestal 65 also can adopt transparent material, and in pedestal 65 outsides, light receiving element 62 is provided with light-blocking member 10 towards the one side of luminescent device 61, light-blocking member is provided with light hole 621.
Said guard 66 is and covers shape, and is provided with a plurality of mesh, is positioned at the front of said pedestal 65.
At the back side of said pedestal 65, between luminescent device 61, light receiving element 62, be provided with the installing space of frosting body, said pedestal 65 is provided with the installed surface 654 of frosting body 8.
Said frost pick-up unit 6 another kind of modes are: utilize optoelectronic switch D301F31A, said optoelectronic switch is the U type.
The principle of work of this frost pick-up unit 6 is: like Fig. 8,9, utilize the barrier of frost 81 as beam channel, through to the blocking, reflect of light beam, change light intensity, light receiving element output signal is changed.This device can be applicable to aspects such as the defrosting control, the control of frost volume of refrigerating appliance.Be contained in the position that needs to detect frost during application.
Heat pump type air conditioner of the present invention, frost pick-up unit be contained on the outdoor heat exchanger or the pipeline of restriction device 4 and pipe arrangement on the position of frosting easily, installed surface is close to the surface of heat interchanger, pipeline; On the pipeline of refrigeration system, also be provided with temperature sensor 7.For example:
Embodiment one:
Like Fig. 5, this device of these frost pick-up unit 6 usefulness is contained in it on pipeline of refrigeration system flow controller outlet in the control of air conditioner automatic defrosting, and installed surface is close to tube-surface.When frost formation and output corresponding signal were arranged between luminescent device, the light receiving element, air conditioner got into the Defrost operation state through controller control.After getting into Defrost operation, when fusing of the frost between luminescent device, the light receiving element and output corresponding signal, finish Defrost operation.
Embodiment two:
Like Fig. 6, this device of these frost pick-up unit 6 usefulness is contained in it on pipeline of outdoor heat exchanger 3 in the control of air conditioner automatic defrosting, and installed surface is close to tube-surface.When frost formation and output corresponding signal were arranged between luminescent device, the light receiving element, air conditioner got into the Defrost operation state through controller control.After getting into Defrost operation, when fusing of the frost between luminescent device, the light receiving element and output corresponding signal, finish Defrost operation.
Like the defrosting control method of embodiment one or embodiment two said heat pump type air conditioners, like Fig. 1,3, wherein, the air conditioner heat-production operation is after t1 minute, and the frost pick-up unit promptly detects the circulation system; When the frost pick-up unit detected the circulation system frost is arranged, air conditioner transferred the Defrost operation pattern to; Behind air conditioner Defrost operation t3 minute, the frost pick-up unit detects the circulation system; When the frost pick-up unit detects the circulation system when frostless, air conditioner transfers the heating operation pattern to.
The defrosting control method of heat pump type air conditioner specifically comprises:
Step 1: the defrosting control model begins;
Step 2: whether control assembly judge defrost operation mark=1, in this way, get into step 3, as not, get into step 8;
Step 3: the frost pick-up unit detects whether accomplished defrost, in this way, gets into step 5, as not, gets into step 4;
Step 4: withdraw from the defrosting control model, to step 1;
Step 5: whether the control assembly judgement time-delay 2min time arrives, in this way, gets into step 6, as not, gets into step 4;
Step 6: the four-way valve of heat pump type air conditioner is opened, outdoor fan starts, and indoor fan normally starts, and gets into step 7;
Step 7: the zero clearing of defrost mark gets into step 14;
Step 8: control assembly judges whether to satisfy compressor minimum working time, in this way, gets into step 10, as not, gets into step 9;
Step 9: withdraw from the defrosting control model, to step 1;
Step 10: control assembly judges whether to satisfy accumulated running time, in this way, gets into step 11, as not, gets into step 9;
Step 11: the frost pick-up unit detects whether frost is arranged, and in this way, gets into step 12, as not, gets into step 9;
Step 12: the four-way valve of heat pump type air conditioner stops, outdoor fan stops, and indoor fan stops, and gets into the Defrost process, gets into step 13;
Step 13: control assembly is set defrost operation mark=1, gets into step 14;
Step 14: withdraw from the defrosting control model, to step 1.
Control mode one: through single-chip microcomputer signal is carried out processing controls, behind heat pump heating operation certain hour, the continuous certain hour of frost pick-up unit detects frosting and output corresponding signal, and air conditioner gets into Defrost operation.After getting into Defrost operation, when the frost pick-up unit detects frostless and during output corresponding signal, finishes Defrost operation behind the time-delay certain hour.
The defrosting control method of above-mentioned heat pump type air conditioner is like Fig. 2,4, wherein; When the frost pick-up unit detects the circulation system frost is arranged; The single-chip microcomputer of control assembly is through further analyzing the pipeline variation of temperature, and confirming has frost, air conditioner to transfer the Defrost operation pattern to.
The defrosting control method of above-mentioned heat pump type air conditioner is like Fig. 2,4, wherein; When the frost pick-up unit detects the circulation system when frostless; The single-chip microcomputer of control assembly is through further analyzing the pipeline variation of temperature, and the affirmation frost has been changed, and air conditioner transfers the heating operation pattern to.
Said pipeline temperature refers to the temperature at any place of the circulation system, refers in particular to the temperature of evaporator.
Control mode two: signal is carried out processing controls through single-chip microcomputer; Behind heat pump heating operation certain hour; The continuous certain hour of frost pick-up unit detects frosting and output corresponding signal; And when the continuous certain hour of temperature sensor detected the pipeline temperature and is lower than setting value, air conditioner got into Defrost operation.After getting into Defrost operation, when the frost pick-up unit detects frostless and during output corresponding signal, finish Defrost operation after when time-delay certain hour, the continuous certain hour of temperature sensor detect the pipeline temperature and be higher than setting value.
Below illustrate control mode one and control mode two:
Control mode one routine 1. frost pick-up units place on the restriction device export pipeline, and installed surface is close to tube-surface.Temperature sensor places on the pipeline of indoor heat exchanger.When the continuous t1min of frost pick-up unit output frosting signal, and the continuous t2min of temperature sensor is when detecting the refrigeration system pipeline temperature and being lower than T1 ℃, and air conditioner gets into Defrost operation.After getting into Defrost operation, when the frost pick-up unit detected frostless state and output corresponding signal, time-delay t3min finished Defrost operation.
Control mode one example 2
The frost pick-up unit places the position that forms frost on the pipe arrangement pipeline easily, and installed surface is close to tube-surface.Temperature sensor places on the pipeline of indoor heat exchanger.When the continuous t1min of frost pick-up unit output frosting signal, and the continuous t2min of temperature sensor is when detecting the pipeline temperature and being lower than T1 ℃, and air conditioner gets into Defrost operation.After getting into Defrost operation, when the frost pick-up unit detected frostless state and output corresponding signal, time-delay t3min finished Defrost operation.
Control mode one routine 3. frost pick-up units place on the pipeline of outdoor heat exchanger, and installed surface is close to tube-surface.When the continuous t1min of frost pick-up unit output frosting signal, and the continuous t2min of temperature sensor is when detecting the pipeline temperature and being lower than T1 ℃, and air conditioner gets into Defrost operation.After getting into Defrost operation, when the frost pick-up unit detects frostless state and output corresponding signal, finish Defrost operation.
Control mode one example 4.
The frost pick-up unit places on the pipeline of outdoor heat exchanger, and installed surface is close to tube-surface.When the continuous t1min output of frost pick-up unit frosting signal, air conditioner gets into Defrost operation.After getting into Defrost operation, when the frost pick-up unit detects frostless state and output corresponding signal, finish Defrost operation.
Control mode two routine 1. frost pick-up units place on the restriction device export pipeline, and installed surface is close to tube-surface.Temperature sensor places on the pipeline of indoor heat exchanger.When the continuous t1min of frost pick-up unit output frosting signal, and the continuous t2min of temperature sensor is when detecting the refrigeration system pipeline temperature and being lower than T1 ℃, and air conditioner gets into Defrost operation.After getting into Defrost operation, when the frost pick-up unit detects frostless state and output corresponding signal, and the continuous t3min of temperature sensor finishes Defrost operation when detecting the refrigeration system pipeline temperature and being higher than T2 ℃.
Annotate: time t, temperature T are looked the refrigeration system of concrete type and are confirmed.
Above-mentioned listed concrete implementation is nonrestrictive, to one skilled in the art, is not departing from the scope of the invention, and various improvement and the variation carried out all belong to protection scope of the present invention.
Claims (9)
1. frost pick-up unit; It is characterized in that: include luminescent device (61) and light receiving element (62); By pedestal (65) as support component; Said pedestal (65) is provided with luminescent device installation portion (651), light receiving element installation portion (652) and printed-wiring board (PWB) installation portion (653), and said luminescent device installation portion (651), light receiving element installation portion (652) and printed-wiring board (PWB) installation portion (653) are semi-enclosed cavity; Luminescent device (61) and light receiving element (62) are fixed on pedestal (65) through printed-wiring board (PWB) (63) and go up in the corresponding cavity; Lead (64) transmission of electric signal through being connected with printed-wiring board (PWB) (63); Said light receiving element (62) is a light receiving surface towards the one side of luminescent device (61), and said pedestal (65) is provided with light hole (621) near the wall at light receiving surface place; Said frost pick-up unit (6) also includes the guard (66) and the geometrical clamp (67) of proofing dust and protecting, and guard (66) is positioned at outside the pedestal (65), is buckled in position between said luminescent device installation portion (651) and the light receiving element installation portion (652); Geometrical clamp (67) is " U " shape of half-twist, is clamped on the depression position of said luminescent device installation portion (651) and light receiving element installation portion (652) below.
2. frost pick-up unit as claimed in claim 1 is characterized in that: said guard (66) is and covers shape, and is provided with a plurality of mesh, is positioned at the front of said pedestal (65).
3. frost pick-up unit as claimed in claim 2; It is characterized in that: the back side in said pedestal (65); Be positioned at the installing space that is provided with the frosting body between luminescent device (61), the light receiving element (62), said pedestal (65) is provided with the installed surface (654) of frosting body (8).
4. frost pick-up unit as claimed in claim 3 is characterized in that: said frost pick-up unit (6) utilizes optoelectronic switch D301F31A, and said optoelectronic switch is the U type.
5. heat pump type air conditioner includes control assembly, outdoor heat exchanger (3), outdoor fan, compressor (1), four-way valve (2), indoor heat exchanger (5), indoor fan and restriction device (4); Said outdoor heat exchanger (3), compressor (1), four-way valve (2), restriction device (4) and indoor heat exchanger (5) are connected to form the circulation system of sealing through refrigerant pipe, and refrigerant circulates in the said circulation system; It is characterized in that: said heat pump type air conditioner also include be installed on the circulation system like any one described frost pick-up unit (6) in the claim 1 to 4; Said frost pick-up unit (6) is connected with said control assembly circuit, and converts detected light signal into electric signal and be transferred to said control assembly.
6. control the method that heat pump type air conditioner as claimed in claim 5 defrosts, it is characterized in that: the air conditioner heat-production operation is after t1 minute, and the frost pick-up unit promptly detects the circulation system; When the frost pick-up unit detected the circulation system frost is arranged, air conditioner transferred the Defrost operation pattern to; Behind air conditioner Defrost operation t3 minute, the frost pick-up unit detects the circulation system; When the frost pick-up unit detects the circulation system when frostless, air conditioner transfers the heating operation pattern to; Specifically comprise:
Step 1: the defrosting control model begins;
Step 2: whether control assembly judge defrost operation mark=1, in this way, get into step 3, as not, get into step 8;
Step 3: the frost pick-up unit detects whether accomplished defrost, in this way, gets into step 5, as not, gets into step 4;
Step 4: withdraw from the defrosting control model, to step 1;
Step 5: whether the control assembly judgement time-delay 2min time arrives, in this way, gets into step 6, as not, gets into step 4;
Step 6: the four-way valve of heat pump type air conditioner is opened, outdoor fan starts, and indoor fan normally starts, and gets into step 7;
Step 7: the zero clearing of defrost mark gets into step 14;
Step 8: control assembly judges whether to satisfy compressor minimum working time, in this way, gets into step 10, as not, gets into step 9;
Step 9: withdraw from the defrosting control model, to step 1;
Step 10: control assembly judges whether to satisfy accumulated running time, in this way, gets into step 11, as not, gets into step 9;
Step 11: the frost pick-up unit detects whether frost is arranged, and in this way, gets into step 12, as not, gets into step 9;
Step 12: the four-way valve of heat pump type air conditioner stops, outdoor fan stops, and indoor fan stops, and gets into the Defrost process, gets into step 13;
Step 13: control assembly is set defrost operation mark=1, gets into step 14;
Step 14: withdraw from the defrosting control model, to step 1.
7. the defrosting control method of heat pump type air conditioner as claimed in claim 6; It is characterized in that: when the frost pick-up unit detects the circulation system frost is arranged; The single-chip microcomputer of control assembly is through further analyzing the pipeline variation of temperature, and confirming has frost, air conditioner to transfer the Defrost operation pattern to.
8. the defrosting control method of heat pump type air conditioner as claimed in claim 6; It is characterized in that: when the frost pick-up unit detects the circulation system when frostless; The single-chip microcomputer of control assembly is through further analyzing the pipeline variation of temperature, and the affirmation frost has been changed, and air conditioner transfers the heating operation pattern to.
9. like the defrosting control method of claim 7 or 8 described heat pump type air conditioners, it is characterized in that: said pipeline temperature refers to the temperature at any place of the circulation system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910041626A CN101988839B (en) | 2009-08-04 | 2009-08-04 | Rime ice detection device, heat-pump air-conditioner and defrosting control method thereof |
| PCT/CN2010/075676 WO2011015133A1 (en) | 2009-08-04 | 2010-08-03 | Frost detection device, heat pump air conditioner and defrost control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910041626A CN101988839B (en) | 2009-08-04 | 2009-08-04 | Rime ice detection device, heat-pump air-conditioner and defrosting control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101988839A CN101988839A (en) | 2011-03-23 |
| CN101988839B true CN101988839B (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910041626A Active CN101988839B (en) | 2009-08-04 | 2009-08-04 | Rime ice detection device, heat-pump air-conditioner and defrosting control method thereof |
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| Country | Link |
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| CN (1) | CN101988839B (en) |
| WO (1) | WO2011015133A1 (en) |
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|---|---|---|---|---|
| CN102435145B (en) * | 2011-10-27 | 2017-07-18 | 青岛海尔洗衣机有限公司 | The sensor of sensing frost thickness, the refrigerator with the sensor and method of work |
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| CN201622078U (en) * | 2009-08-04 | 2010-11-03 | 珠海格力电器股份有限公司 | Ice-frost detecting device and heat-pump type air conditioner |
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| WO2011015133A1 (en) | 2011-02-10 |
| CN101988839A (en) | 2011-03-23 |
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