CN1204027A - Defrosting apparatus of air conditioner and method thereof - Google Patents
Defrosting apparatus of air conditioner and method thereof Download PDFInfo
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- CN1204027A CN1204027A CN 98115214 CN98115214A CN1204027A CN 1204027 A CN1204027 A CN 1204027A CN 98115214 CN98115214 CN 98115214 CN 98115214 A CN98115214 A CN 98115214A CN 1204027 A CN1204027 A CN 1204027A
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Abstract
An air conditioner using refrigeration cycle includes a directional-control valve for controlling the flow of the cryogen in order to execute cooling work or heating work. During the heating work, the temperature of outdoor heat exchanger is detected and compared with reference temperature value. If the detected temperature is lower than the reference temperature value, the time cycle is begin to be counted. When the counted time cycle reaches the first reference time value and if the detected temperature is still lower than the reference temperature value, the directional-control valve changes direction to make the outdoor heat exchanger defrosts. However, if the detected temperature exceeds the reference temperature value and reaches the second reference time before the counted time cycle reaches the first reference time value, the counted time cycle will be cleared.
Description
The present invention relates to have refrigeration and the bifunctional air-conditioner of heating work, particularly the air-conditioner defrosting mode that outdoor heat exchanger is defrosted.
Generally speaking, air-conditioner comprises by cold air in the heating clamber provides the heater of warm air and the cooling device of cool air is provided by warm air in the cooling chamber.In addition, also comprise heater and refrigerating plant, it has the purification function of heating and refrigeration work dual-use function and clean room internal contamination air.
Fig. 1 and Fig. 2 illustrate the indoor unit of heating and cooling device (generally being referred to as air-conditioner).As shown in Figure 1, indoors the main body of unit (below be referred to as main body) front, bottom provides suction import 3 that an air sucks grid member 5 and a plurality of suction room airs and a plurality of main body upper front that is positioned to be used for the venting heat exchange air, promptly is inhaled into and outlet 7 that heat or chilled air by sucking import 3.
In addition, outlet 7 comprises: vertical blade 11 and horizontal blade 9, and they are used for controlling the vertical and horizontal direction of discharging air by outlet 7; One attached lid member 13, it forms the outer decoration of main body and is used for protecting its inner part; One places the operating parts 15 of lid member bottom, is used for controlling the whole mode of operation of air-conditioner (refrigeration, dehumidifying, blowing, heating etc. automatically), its starting, amount and the direction that stops and discharging air by outlet 7.
As shown in Figure 2, there is a filtration members 17 to place air to suck the inboard of grid member 5, be used for filtering the dust and the foreign matter that are suspended in by in the room air that sucks import 3 suctions, also have a rectangle indoor heat exchanger 19 to be arranged in the back of said filtration members 17, method by vaporized refrigerant latent heat, be used for room air is carried out heat exchange, become the air of heating or the air of cooling.
In addition, indoor heat exchanger 19 equipment one blower fan 23 (hereinafter referred to as indoor fan), it rotates corresponding to the work of an indoor fan motor 21, so that suck room airs by sucking import 3; Discharge the air that on said heat exchanger 19, has carried out heat exchange by outlet 7.Indoor fan 23 is also equipped a guide 25 in its outside, is used for covering indoor fan, and to leading by the air stream that sucks import 3 inhaled airs stream and discharge by outlet 7.
In having heating and the bifunctional reverse air-conditioner of refrigeration work, one cross valve 31 is switched on, be used for making air-conditioner to be in the heating work state, by this, said cold-producing medium circulates in the following order: compressor 39-cross valve 31-indoor heat exchanger 19-expansion valve 33-thermal expansion valve 34-outdoor heat exchanger 35-cross valve 31-compressor 39, and shown in the dotted line among Fig. 3.
On the other hand, when making air-conditioner be in the refrigeration work state when said cross valve commutation, said cold-producing medium circulates in the following order: compressor 39-cross valve 31-outdoor heat exchanger 35-check valve 36-expansion valve 33-indoor heat exchanger 19-cross valve 31-compressor 39, and shown in the solid line among Fig. 3.
In a word, when said cross valve 31 was connected or commutated, it controlled the circulation route of said cold-producing medium respectively by dotted line or solid line.
In having heating and the bifunctional reverse air-conditioner of refrigeration work, the user is with remote controller or connecting startups/stop key (below be referred to as operated key) on the operating parts 15, with the mode of operation (for example, heating) of selecting requirement.When the temperature (Ts) that is provided with is higher than room temperature (Tr),, determine to drive the operating frequency of said compressor 39 according to the temperature difference of Ts and Tr.
When said compressor 39 is driven, said cold-producing medium circulates in the following order, as shown in phantom in Figure 3: compressor 39-cross valve 31-indoor heat exchanger 19-expansion valve 33-thermal expansion valve 34-outdoor heat exchanger 35-cross valve 31-compressor 39, heat indoor heat-heat exchanger 19 by this.Indoor fan 23 is controlled according to the temperature of indoor heat exchanger 19.
If the temperature of indoor heat exchanger 19 is lower than predetermined temperature (about 27 ℃), stop indoor fan 23, in case cool air is discharged in initial heat-up stage.If the temperature of indoor heat exchanger is higher than predetermined temperature (about 27 ℃), indoor fan 23 work.
If indoor fan 23 is in running order, is suspended in by sucking dust and the foreign matter that import 3 is drawn in the room air in the main body and removes by filtration members 17.The room air that has purified is by the evaporation of cold-producing medium latent heat in the indoor heat exchanger 19, and heat exchange becomes warm air.
Upwards guiding and be discharged to indoor of the warm air that carries out overheated exchange indoors on the heat exchanger 19 by outlet 7.The warm air of discharging by outlet 7 is according to the angle of vertically blade and horizontal blade and definite air flow carries out heating work.
If heating work proceeds to cycle regular hour, and the air that is blown into from the outside carries out heat exchange on the heat exchanger 35 out of doors and cools off by means of the latent heat of evaporation, because cool air discharges to the outside, and out of doors may frosting on the heat exchanger.Problem is that the frost of accumulation can become thick ice, thereby has reduced the operating efficiency of outdoor heat exchanger 35 and increased energy consumption.In addition, also have the another one problem, the frost that is accumulated on the outdoor heat exchanger 35 causes icing phenomenon, makes compressor 39 produce the work defective.
For these problems, traditional air-conditioner comprises a tube temperature sensor (not shown), during the heating work and the temperature of outdoor heat exchanger 35 pipes reduce to below the predetermined temperature (approximately-2 ℃), compressor operating 30 minutes, the temperature that sensor detects outdoor heat exchanger 35 once.As long as the temperature of outdoor heat exchanger pipe is in below-2 ℃, sensor was counted the pre-defrosting time cycle.If the time cycle surpasses predetermined reference time value (at about 10 minutes), ice-formation condition is assumed to: accumulate frost on the heat exchanger and formation ice out of doors.For this reason, stop outdoor fan 37 and indoor fan 23, with the termination heating work, and make cross valve 31 commutations, so that convert the work of air-conditioner to refrigeration work.
So, cold-producing medium circulates by the order of following refrigeration work: compressor 39-cross valve 31-outdoor heat exchanger 35-check valve 36-expansion valve 33-indoor heat exchanger 19-cross valve 31-compressor 39, by this, begin to heat outdoor heat exchanger 35, so that remove the frost that is accumulated on the outdoor heat exchanger 35.
Yet, if the temperature of outdoor heat exchanger 35 surpasses predetermined temperature,, reaching before cycle of 10 minutes if perhaps mode of operation is changed into other any mode of operation from the heating work pattern, it is zero that the time cycle of counting removes.So, air-conditioner has such problem by this traditional Defrost method, the noise that produces from sensor input block (not shown) may cause unsettled temperature detection, the for example instantaneous rising of outdoor heat exchanger 35 temperature, thereby during the pre-defrosting time cycle is counted, temperature surpasses reference temperature value, and the removing of the time cycle of counting is zero, thereby can not make suitable defrost operation.
The present invention relates to a heating/refrigerating plant method of operating, this device comprises a compressor; One indoor heat exchanger; One outdoor heat exchanger; A plurality of moving conduits of between compressor, indoor heat exchanger and outdoor heat exchanger directs refrigerant that are used for; And a reversal valve, it is used for controlling the flow direction of cryogen by said device, so that select to carry out refrigeration or heating work.Said method may further comprise the steps:
A. make the direction of said reversal valve, so that carry out heating work, wherein, cold-producing medium is heated in the heat exchanger out of doors, and indoors in the heat exchanger, heat discharges from cold-producing medium;
B. during steps A, detect the temperature of outdoor heat exchanger, and the detected temperature and first reference temperature value are compared;
C. become when being lower than reference temperature value when the temperature of outdoor heat exchanger, begin the time cycle is counted;
D. be lower than said reference temperature when the temperature of outdoor heat exchanger, and the time cycle of counting reached for first reference time during value, made reversal valve reverse, so that remove the frost on the outdoor heat exchanger; And
E. before the time cycle of counting reaches the first reference time value, if when the temperature of outdoor heat exchanger equals first reference temperature value of the second reference time value above second reference temperature value or time cycle, said gate time cycle zero clearing.
Preferably only in steps A, carry out a preset time after the cycle, again execution in step B.
Feature for a more complete understanding of the present invention and purpose are made following detailed explanation in conjunction with all accompanying drawings, wherein:
Fig. 1 is the perspective view of a conventional air conditioner indoor unit;
Fig. 2 is the longitdinal cross-section diagram of Fig. 1;
Fig. 3 is the line map of heating of expression one conventional air conditioner and refrigerant circulation line;
Fig. 4 is a defroster schematic block diagram according to an embodiment of the invention;
Fig. 5 A and Fig. 5 B show a flow chart according to the defrost operation of air-conditioner of the present invention.
With reference to Fig. 4, Fig. 5 A and Fig. 5 B describe a most preferred embodiment of the present invention in detail.When describing work of the present invention, will be with reference to label among the figure 1～3 and symbol.
As shown in Figure 4, provide power supply apparatus 100, the commercial ac voltage that AC power (not shown) is supplied with is converted to DC voltage.Manipulation device 102 comprises a plurality of options buttons that are used for all working pattern (refrigeration, dehumidifying, blowing, heating etc. automatically); Be used for handling a plurality of options buttons of discharging air mass flow (high wind, weak wind or soft wind) by outlet 7; Be used for temperature (Ts) is set to the options button of institute's required value; And job key that is used for starting and stopping air-conditioner.
Room temperature detector spare 106 detects the indoor air temperature (Tr) that sucks by said suction import 3, compares with the temperature (Ts) that manipulation device 102 is provided with the user, so that the heating work of control air-conditioner.Indoor tube temperature detection means 108 detects the temperature of indoor heat exchanger 19 pipes that change during heating work.Just, cold-producing medium changes by the temperature of indoor heat exchanger 19.Outdoor tube temperature detection means 110 detects the temperature of the outdoor heat exchanger pipe that changes during heating work.Just, cold-producing medium changes by the temperature of outdoor heat exchanger 35.Detected temperature outputs to said control device 104.
Direction of air control device 120 controls one direction of air motor 121, guiding enters said predetermined level and vertical direction by the discharge air of outlet 7, is evenly distributed in whole indoor.During this period, driven compressor device 122 is according to the selected temperature of user (Ts) and by the temperature difference between the room temperature detector spare 106 detected actual room temperatures (Tr), in response to the control signal that control device 104 produces, control the work of said compressor 39.
Outdoor fan motor drive part 124, according to the selected temperature of user (Ts) and by the temperature difference between the room temperature detector spare 106 detected actual room temperatures (Tr), control signal in response to control device 104 generations, by controlling the rotary speed of said outdoor fan motor 25, blow out of doors out of doors and carry out the air of heat exchange on the heat exchanger, thereby control outdoor fan.
Indoor fan motor drive part 126, it uses manipulation device 102 selected air velocitys according to the user, control signal in response to said control device 104 generations, by controlling the rotary speed of said indoor fan motor 21, so that blow the air that carries out heat exchange on the heat exchanger 19 indoors indoors.
As shown in drawings, cross valve driving element 128, in response to a control signal of control device 104 generations, according to controlling leading to/commutation work of cross valve 31, so that change the flow direction of said cold-producing medium by the condition of work (refrigeration or heating) of manipulation device 102 inputs.Display device 130 shows by manipulation device 102 selected mode of operations (refrigeration, dehumidifying, blowing, heating or the like automatically), be switched on or switched off a defrosting display lamp, so that indication defrosting work begins or defrosts and finish, and shows said air-conditioner all working state.
The effect of one defroster and control method thereof is below described.Fig. 5 A and Fig. 5 B are the block diagram according to defroster working procedure of the present invention, and wherein reference symbol S means the step of method.
At first, when air-conditioner was switched on, power supply apparatus 100 was used for converting the commercial ac voltage that the AC power terminal is supplied with to driving air-conditioner required predetermined direct current voltage, after this it is outputed to each drive circuit and control device 104.
In step S1, the DC voltage of exporting from said power supply apparatus 100 is received by said control device 104, makes air-conditioner work initialization.At this moment, the user presses a job key with manipulation device 102, so that select air-conditioner one mode of operation (for example heating); Set a temperature on request; And set an air capacity (speed), by this, a work enabling signal and other work select signal (below be referred to as working signal) to send to said control device 104.
In step S2, control device determines whether to have imported a working signal from manipulation device 102.If not to control device (104) input service signal (situation of NO), the work that repeating step S2 is later, air-conditioner remains on the stand-by operation state.
As the result of step S2 identification, if imported working signal (situation of YES), flow process advances to step S3, and at this moment, control device 104 examinations are heating work by the operating mode of manipulation device 102 inputs.If there is not the working signal of heating work to be input to control device 104 (situation of NO), flow process advances to step S31, carries out a cooling or a dehumidifying job, and the later work of repeating step S3.
As the result of step S3 identification, if work is a heating work (situation of YES), then flow process advances to step S4, and at this moment, control device 104 sends the control signal of the said cross valve 31 of a control to said cross valve driving element 128.For this reason, cross valve driving element 128 is according to the control of control device 104, connect cross valve 31, by this, cold-producing medium circulates by following direction: compressor 39-cross valve 31-indoor heat exchanger 19-expansion valve 33-thermal expansion valve 34-outdoor heat exchanger 35-cross valve 31-compressor 39.
In step S5, indoor tube temperature detection means 110 detects the temperature (Tip) of indoor heat exchanger 19.At this moment, control device 104 receives the analogue data by indoor tube temperature detection means 110 detected indoor tube temperature (Tip), and it is converted to digital information, by this, determine that whether indoor tube temperature is lower than a predetermined reference temperature value (T1) (about 27 ℃), discharges cool air so that prevent in the starting stage of heating work.
As the recognition result of step S5, if indoor tube temperature (Tip) is lower than said reference temperature value (T1) (YES situation), air should indoors not discharged, because it is too cool.So outdoor unit at first is driven and heats indoor heat exchanger 19, and does not start indoor fan 23.Then, flow process advances to step S6, and at this moment, control device 104 determines whether outdoor unit is in a condition of work.When being lower than the temperature (Ts) of user's setting by room temperature detector spare 106 detected room temperatures (Tr), the condition of work of outdoor unit appears.
As the recognition result of step S6, if outdoor unit is not in working condition, the then later work of repeating step S5.If said outdoor unit is in working condition (situation of YES), then flow process advances to step S7, at this moment, control device 104 is according to the temperature difference of room temperature (Tr) with design temperature (Ts), determine the operating frequency of said compressor 39 and the rotary speed of outdoor fan motor 125, and output is used for the control signal of drive compression machine 39 and the control signal that drives outdoor fan 37 and gives driven compressor device 122 and outdoor fans drive device 124 respectively.
So driven compressor device 122 is pressed the operating frequency drive compression machine 39 that control device 104 is determined, and the rotary speed that outdoor fan motor drive part 124 is determined by control device 104 drives outdoor fan 37.
In step S8, the temperature of the indoor heat exchanger 19 of heating in indoor tube temperature detection means 110 detects during being made by compressor 39 work that cold-producing medium circulates, and whether control device 104 is determined by indoor tube temperature detection means 110 detected indoor tube temperature (Tip) above reference temperature value (T1).If indoor tube temperature (Tip) does not surpass reference temperature value (situation of NO), should not discharge air indoors, because it is too cool from a plurality of outlets of air-conditioner.Thereby flow process is got back to S7, the work that repeating step S7 is later.
As the recognition result of step S8,, then discharge air from a plurality of outlets of air-conditioner indoors if indoor tube temperature (Tip) surpasses said reference temperature value (T1) (situation of YES).Flow process advances to step S9, and at this moment, control device 104 is to indoor fans drive device 126 outputs one control signal, to drive indoor fan 23.Thereby indoor fans drive device 126 drives indoor fan 23 by control the rotary speed of indoor fan motor 21 by the air capacity that presets.
As the result of step S5 identification, if indoor tube temperature (Tip) not below reference temperature value (T1) (situation of NO) then can be discharged air indoors in a plurality of discharges of air-conditioner.Thereby flow process advances to step S51, and at this moment, control device 104 is to indoor fan motor drive part 126 outputs one control signal, to drive indoor fan 23.Thereby indoor fan motor drive part 126 drives indoor fan 23 by the air capacity that presets by the rotary speed of controlling indoor fan motor 21.In step S52, control device 104 determines whether outdoor unit is in a working condition.
As the recognition result of step S52, if outdoor unit is not in described condition of work (situation of NO), then flow process turns back to step S5, and the later work of repeating step S5, and air-conditioner remains on a holding state.If outdoor unit is in working condition (situation of YES), flow process advances to step S53, at this moment, control device 104 is according to the temperature difference of room temperature (Tr) with design temperature (Ts), determine the operating frequency of compressor 39 and the rotary speed of outdoor fan motor 125, by this, be used for the control signal of drive compression machine 39 and outdoor fan 37 to 124 outputs of driven compressor device 122 and outdoor fan motor drive part respectively.
So driven compressor device 122 is pressed the operating frequency drive compression machine 39 that control device 104 is determined, and the rotary speed that outdoor fan motor drive part 124 is determined by control device 104 drives outdoor fan 37.Then, flow process advances to step S10.
Indoors the warm air that heat exchange becomes on the heat exchanger 19 is discharged from, thereby makes indoor warming up, and the direction basis that air is discharged can swing the vertical blade of connection at outlet 7 places and the angle of horizontal blade is controlled.At this moment, the liquid refrigerant of low-temp low-pressure expands by expansion valve 33 and thermal expansion valve 34 becomes its evaporating pressure, and by this, the pressure of cold-producing medium reduces the gaseous refrigerant that becomes low-temp low-pressure, is injected into outdoor heat exchanger 35.
If a preset time cycle has been carried out in heating work, latent heat by means of the cold-producing medium evaporation, the air that is blown by outdoor fan has carried out heat exchange on the heat exchanger 35 out of doors and has cooled off, and wherein cold air can cause that out of doors the accumulation frosting comes on the heat exchanger 35.Along with the propelling of time, the frost that accumulation is got up is transformed into the thick ice that causes the phenomenon of freezing.
In order to detect the accumulation on the white unit out of doors, by the temperature (Top) of outdoor heat exchanger 35 and the comparison of outdoor temperature (To), and the working time of considering compressor, determine the defrosting condition.Thereby the duty of compressor 39 is determined in step S11.If compressor is not worked (situation of NO), then flow process is returned step S10, and the later work of repeating step S10.
Recognition result as step S11, if compressor operating (situation of YES), then flow process advances to step S12, at this moment, determines whether to surpass predetermined reference time value t3 (about 30 minutes) by the working time of the compressor 39 of the timer counting that is embedded in compressor inside.If the working time of compressor 39 does not surpass reference time value (t3), then flow process is returned step S10, and the later work of repeating step S10.
Result as step S10 identification, the compressor operating time surpasses reference time value (t3) (situation of YES), and just compressor 39 was worked 30 minutes, and then flow process advances to step S13, at this moment, detect the temperature (Top) of outdoor heat exchanger 35 by outdoor tube temperature device 110.Control device 104 receives the analogue data of outdoor tube temperature (Top), and it is converted to numerical data, and determine whether outdoor tube temperature (Top) is lower than a predetermined reference temperature value T2 (the outdoor heat exchange actuator temperature of frosting on the heat exchanger out of doors).
As the result of step S13 identification, if outdoor tube temperature (Top) is not less than reference temperature value (T2) (situation of NO), frosting on the heat exchanger 35 out of doors, thereby, flow process turns back to step S10, and the later work of repeating step S10, and keeps heating work.
On the other hand, as the recognition result of step S13, if outdoor tube temperature (Top) is lower than reference temperature value (T2) (situation of YES), frosting on the heat exchanger 35 out of doors.Thereby flow process advances to step S14, and this moment in the pre-defrosting time cycle begins to be counted.
At this moment, during the pre-defrosting time cycle is counted, if rising, the temperature of outdoor heat exchanger 35 surpasses a reference temperature value (T2+2), and more than the T2+2 temperature, kept a predetermined reference time value (t5), if pattern is changed into other any mode of operation from the heating work pattern when perhaps working, then Ji Shuo the pre-defrosting time cycle must zero clearing.Thereby flow process advances to step S15, at this moment, determines whether the temperature of outdoor pipe surpasses reference temperature value (T2+2).
As the recognition result of step S15, if outdoor tube temperature (Top) does not surpass reference temperature value (T2+2), flow process advances to step S16, determines whether outdoor tube temperature (Top) surpasses reference temperature value (T2) this moment.
Recognition result as step S16, if outdoor tube temperature (Top) does not surpass reference temperature value (T2) (situation of NO), then flow process advances to S17, at this moment, determine whether time that outdoor tube temperature (Top) experienced surpasses a predetermined reference time value (t4) (out of doors on the heat exchanger frosting and form the needed time of ice, about 10 minutes) below reference temperature value (T2).If the time that outdoor tube temperature (Top) is experienced below reference temperature value (T2) does not surpass reference time value (t4) (situation of NO), then flow process is returned step S16 and the later work of repeating step S16.
As the result of step S17 identification, if the time that outdoor tube temperature is experienced reference temperature value (T2) below above reference time value (t4) (situation of YES), suppose out of doors frosting on the heat exchanger 35 and form ice.Thereby flow process advances to step S18, this moment, control device 104 was to outdoor fan motor drive 124, to indoor fan motor drive part 126 and to cross valve driver 128 output control signals, so that stop outdoor fan 125, indoor fan 21 and cross valve 31 respectively.In addition, display device 130 is connected the defrosting display lamp, falls the duty of frost with demonstration.
According to control signal from control device 104, outdoor fan motor drive part 124 stops outdoor fan motor 125 rotations, to stop outdoor fan 37 rotations, indoor fan motor drive part 126 stops indoor fan motor 21 rotations, rotate to stop indoor fan 23, and just cross valve 31 commutations of cross valve driving element 18.
When cross valve 51 commutations, cold-producing medium circulates in the following order: compressor 39-cross valve 51-outdoor heat exchanger 35-check valve 36-expansion valve 33-indoor heat exchanger 19-cross valve 31-compressor 39, allow high temperature refrigerant flow through outdoor heat exchanger 35, heat outdoor heat exchanger 35 by this.At this moment, outdoor fan and indoor fan 23 are in off working state, to stop the execution of heat exchange.Thereby outdoor heat exchanger 35 is heated, so that remove the frost that is accumulated on the outdoor heat exchanger, finishes defrosting work by this.
On the other hand, as the recognition result of step S15,, determine that just moment is not subjected to The noise to outdoor tube temperature (Top) if the temperature of outdoor pipe (Top) surpasses reference temperature value (T2+2) (situation of YES).Replace and determine that outdoor tube temperature (Top) has in fact risen and surpassed reference temperature value (T2).Flow process advances to step S21, and this moment, control device 104 was with the zero clearing of pre-defrosting time cycle.Flow process turns back to step S13, and the later work of repeating step S13.
Recognition result as step S16, if the temperature of outdoor pipe (Top) surpasses reference temperature value (T2) (situation of YES), flow process advances to step S20, at this moment, whether control device 104 definite outdoor tube temperature (Top) remain on has been expired predetermined reference time value (t5) (about 1 minute) more than the reference temperature value (T2), so that determine owing to be introduced into the noise of outdoor tube temperature detection means 110, just whether the temperature (Top) of outdoor pipe the moment rising, and said noise can make the temperature detection instability.
As the recognition result of step S20,, can determine that outdoor tube temperature (Top) is because noise is to rise moment if reference time value (t5) is not exceeded (situation of NO).Thereby outdoor tube temperature (Top) can be left in the basket.Flow process advances to step S17, and the later work of repeating step S17.
Result as step S20 identification if the reference time (t5) is exceeded (situation of YES), can confirms that outdoor tube temperature (Top) is not subjected to The noise, but rise above reference temperature value (T2).Flow process advances to step S21, and at this moment, control device 104 makes the pre-defrosting time cycle zero clearing of counting.Flow process turns back to step S13 and the later work of repeating step S13.
As mentioned above, the effect of air-conditioner defroster of the present invention is, only owing to introduce outdoor pipe Whether in the situation of the noise of temperature detection device, rising by the temperature of determining outdoor heat exchanger surpasses One reference temperature value, it is normal to make said defroster and control method thereof help said air-conditioner to carry out Defrost operation.
Claims (8)
1. the defroster of an air-conditioner, this device comprises:
One compressor is used for to a cold-producing medium supply pressure;
One outdoor heat exchanger and an indoor heat exchanger are used for receiving cold-producing medium from compressor, and carry out heat exchange with surrounding air;
One reversal valve, it places between compressor and indoor heat exchanger and the outdoor heat exchanger, is used for controlling the direction of flow of refrigerant, so that carry out cooling and heating work respectively;
Temperature detection device is used for detecting the temperature of outdoor heat exchanger; And
Control device, it is to control defrosting work like this: when the temperature of outdoor heat exchanger becomes during heating work when being lower than first reference temperature, begin a time cycle count; Reached for first reference time during value when the gate time cycle, a control signal is introduced reversal valve, so that convert heating work to defrosting work; And if the temperature of institute's outdoor heat exchanger surpasses second reference temperature or time cycle and equaled for second reference time when being worth first reference temperature, said gate time cycle zero clearing.
2. according to the said device of claim 1, wherein each heat exchanger also all equips one for improving the fan motor that heat exchange uses and the fan motor drive part of the said fan motor of control, fan motor by the fan motor drive part at said defrosting duration of work according to from a control signal of this control device output and stall.
3. according to the said device of claim 1, wherein also provide a display device that is used to refer to outside defrosting work.
4. according to the said device of claim 3, wherein, said display device comprises a display lamp, and it can be switched on or switched off by the control signal from said control device output.
5. the defrosting control method of an air-conditioner, this air-conditioner has a compressor; One indoor heat exchanger; One outdoor heat exchanger; The conduit of guiding cold-producing medium between compressor, family wind-heat interchanger and outdoor heat exchanger; One reversal valve, it is used for controlling the flow direction of cold-producing medium by this device, so that carry out cooling and heating work selectively; Said method may further comprise the steps:
A. make the direction of reversal valve, so that carry out heating work, wherein, cold-producing medium is heated in the heat exchanger out of doors, and indoors in the heat exchanger, heat discharges from said cold-producing medium;
B. during steps A, detect the temperature of outdoor heat exchanger, and the detected temperature and first reference temperature value are compared;
C. become when being lower than said reference temperature value when the temperature of outdoor heat exchanger, begin the time cycle is counted;
If D. the temperature of outdoor heat exchanger is lower than said reference temperature, reached for first reference time during value when the time cycle of counting, make said reversal valve anti-phase, so that remove the frost on the outdoor heat exchanger; And
E. before the time cycle of counting reaches the first reference time value, if when the temperature of outdoor heat exchanger equals first reference temperature value of the second reference time value above second reference temperature value or time cycle, said gate time cycle zero clearing.
6. according to the said method of claim 5, wherein, step B just carries out after steps A has been carried out a predetermined period of time again.
7. according to the said method of claim 5, wherein, each heat exchanger is also all equipped one and is improved the fan motor of heat exchange and the fan motor drive part of the said fan motor of control, and said method also comprises the step that is made the fan motor stall by the fan motor drive part at the defrosting duration of work according to a control signal of slave controller spare output.
8. according to the said method of claim 5, a display device that is used to refer to outside defrosting work wherein also is provided, said method also comprises the step of indicating said outside defrosting work with said display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98115214 CN1204027A (en) | 1997-06-27 | 1998-06-24 | Defrosting apparatus of air conditioner and method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR28361/97 | 1997-06-27 | ||
| KR28362/97 | 1997-06-27 | ||
| CN 98115214 CN1204027A (en) | 1997-06-27 | 1998-06-24 | Defrosting apparatus of air conditioner and method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN1204027A true CN1204027A (en) | 1999-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98115214 Pending CN1204027A (en) | 1997-06-27 | 1998-06-24 | Defrosting apparatus of air conditioner and method thereof |
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| CN (1) | CN1204027A (en) |
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| CN103123173A (en) * | 2013-03-27 | 2013-05-29 | 宁波奥克斯空调有限公司 | Control method of heat-pump water heater |
| CN103673439A (en) * | 2013-12-29 | 2014-03-26 | 苏州市牛勿耳关电器科技有限公司 | Refrigerator defrosting device |
| CN104930771A (en) * | 2015-06-24 | 2015-09-23 | 广东美的暖通设备有限公司 | Control method of heat pump system |
| CN106574798A (en) * | 2014-10-15 | 2017-04-19 | 夏普株式会社 | Air conditioner |
| CN107208917A (en) * | 2014-11-26 | 2017-09-26 | 江森自控日立空调技术（香港）有限公司 | Air conditioner |
| CN108195106A (en) * | 2017-11-22 | 2018-06-22 | 珠海格力电器股份有限公司 | Hot fluorine defrosting refrigeration system and control method and device of refrigeration house |
| CN110736214A (en) * | 2019-09-27 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
-
1998
- 1998-06-24 CN CN 98115214 patent/CN1204027A/en active Pending
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| CN103123173A (en) * | 2013-03-27 | 2013-05-29 | 宁波奥克斯空调有限公司 | Control method of heat-pump water heater |
| CN103123173B (en) * | 2013-03-27 | 2015-07-15 | 宁波奥克斯空调有限公司 | Control method of heat-pump water heater |
| CN103673439A (en) * | 2013-12-29 | 2014-03-26 | 苏州市牛勿耳关电器科技有限公司 | Refrigerator defrosting device |
| CN106574798A (en) * | 2014-10-15 | 2017-04-19 | 夏普株式会社 | Air conditioner |
| CN106574798B (en) * | 2014-10-15 | 2020-02-28 | 夏普株式会社 | Air conditioner |
| CN107208917A (en) * | 2014-11-26 | 2017-09-26 | 江森自控日立空调技术（香港）有限公司 | Air conditioner |
| CN107208917B (en) * | 2014-11-26 | 2019-08-09 | 日立江森自控空调有限公司 | Air conditioner |
| CN104930771A (en) * | 2015-06-24 | 2015-09-23 | 广东美的暖通设备有限公司 | Control method of heat pump system |
| CN104930771B (en) * | 2015-06-24 | 2018-05-01 | 广东美的暖通设备有限公司 | The control method of heat pump system |
| CN108195106A (en) * | 2017-11-22 | 2018-06-22 | 珠海格力电器股份有限公司 | Hot fluorine defrosting refrigeration system and control method and device of refrigeration house |
| CN110736214A (en) * | 2019-09-27 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
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