CN102175052B - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN102175052B CN102175052B CN201110106934.XA CN201110106934A CN102175052B CN 102175052 B CN102175052 B CN 102175052B CN 201110106934 A CN201110106934 A CN 201110106934A CN 102175052 B CN102175052 B CN 102175052B
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- defrost operation
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Abstract
The present invention provides an air conditioner and a control method thereof, wherein the air conditioner comprises a compressor, an indoor heat converter, an outdoor expansion device, an outdoor heat converter, a reservoir, a first bypass loop, a first thermal valve, an induction heater and a controller; the first induction heater is set on one side of the reservoir to heat a refrigerant in the reservoir, so as to prevent heat from being dissipated into the outdoor air, and shorten time transmitting heat from the induction heater to the refrigerant.
Description
The application is application artificial " LG Electronics Inc. ", the applying date to be dividing an application of November 21, application number in 2008 are 200810179002.6, denomination of invention is " air-conditioning and control method thereof " application.
The cross reference of related application
The application requires the priority of korean patent application No.10-2008-0024693 (submission on March 18th, 2008), No.10-2008-0024694 (submission on March 18th, 2008), No.10-2008-0024695 (submission on March 18th, 2008), at this, by reference their full text is comprised in this application.
Technical field
The present invention relates to the control method of a kind of air-conditioning and a kind of this air-conditioning.
Background technology
Air-conditioning is for room air being remained on to the household electrical appliance under optimum condition according to their purposes and object.For example, air-conditioning is in the cooling interior space and the interior space being heated in winter in summer.Air-conditioning is also controlled the humidity of the interior space and room air is remained under comfortable cleaning condition.
For example air-conditioning make live comfortablely and facilitate articles for use to be widely used, so user need to have the performance of high energy efficiency, improvement and user-friendly product.
Air-conditioning is divided into split-type air conditioner and integrated air conditioner.Split-type air conditioner has indoor set and the off-premises station being separated from each other.Integrated air conditioner is combined into integratedly by off-premises station and indoor set.According to the mounting structure of air-conditioning, again air-conditioning is divided into wall-hanging air conditioner or photo frame type air-conditioning and vertical air conditioner.Wall-hanging air conditioner or photo frame type air-conditioning are installed on wall.Slim-type air conditioner is configured to be erected on floor.
In addition, according to the load-bearing capacity of air-conditioning, air-conditioning is divided into stand-alone type air-conditioning, medium-sized and large-size air conditioning and multi-model air-conditioning.Stand-alone type air-conditioning has and drives the load-bearing capacity of an indoor set and for example, for the little region of area, in family.Medium-sized and large-size air conditioning has very large load-bearing capacity and for company or restaurant.Multi-model air-conditioning has the load-bearing capacity that is enough to drive a plurality of indoor sets.
In the middle of these air-conditionings, split-type air conditioner comprises indoor set and off-premises station.Indoor set is arranged in the interior space, so that warm air or cold air are fed in the space of carrying out air conditioning.Off-premises station compressed refrigerant also expands cold-producing medium, makes to carry out sufficient heat exchange operation in indoor set.
Simultaneously, with regard to prior art for regard to the air-conditioning for warm refrigeration, when outside air temperature in heating operation is greatly about 0 ℃ or during lower than 0 ℃, the heater that for example holds liquid formula heater (sump heater) conventionally along the radial transmission line of reservoir around to improve heating properties, thereby heating and cooling agent.
Yet when liquid-accumulating trough formula heater is applied to reservoir, the heat being lost in outdoor air is very large, and transfers heat to cold-producing medium and will spend long time.And, because the service life of liquid-accumulating trough formula heater is short, therefore must often change heater, so be difficult to guarantee reliability.In addition,, because heater provides identical heat, be therefore difficult to heat to be controlled.
Meanwhile, at the heating operation of the prior art air-conditioning for for warm refrigeration, when the surperficial frosting of outdoor heat converter, by being arranged on the temperature sensor on outdoor heat converter, frequency-changeable compressor changes to low frequency, and cross valve commutation, so temporarily carry out kind of refrigeration cycle to remove frosting.
Yet in this case, indoor heat converter is used as evaporimeter, and defrosts under refrigerating state, so indoor temperature declines.
And, the operation of air-conditioning is changed, thus high temperature refrigerant is fed to outdoor heat converter, therefore increased defrosting time.
In addition, require cross valve to be transformed into cooling down operation from heating operation, this operating reliability to cross valve has adverse effect.
Summary of the invention
Embodiment of the present invention provides a kind of air-conditioning, and the structure that this air-conditioning can be set to the heater of reservoir by improvement improves the efficiency for warm refrigeration performance.
Embodiment also provides a kind of air-conditioning, and this air-conditioning can be by arranging induction heater and utilizing the agent of described induction heater heating and cooling and maintain heating performance in the situation that not increasing compressor power output on reservoir.
Embodiment of the present invention also provides a kind of air-conditioning, and this air-conditioning can make induction heater work in the defrost process of evaporimeter, so that the more heats of low-pressure side cold-producing medium transmission that circulate to heating, thereby improve defrost performance.
Embodiment of the present invention also provides a kind of air-conditioning and control method thereof, and they can simultaneously and effectively heat and defrost.
Embodiment of the present invention also provides a kind of air-conditioning and control method thereof, they are by the laser heating and the defrost operation that optionally carry out normal heating control or heat and defrost according to the temperature of outside air temperature and outdoor heat converter simultaneously, and can improve the defrost performance of indoor heating performance and outdoor heat converter.
Embodiment of the present invention also provides a kind of air-conditioning and control method thereof, they are by the laser heating and the defrost operation that hocket common defrost operation and heat and defrost according to the temperature of outside air temperature and outdoor heat converter simultaneously, and can when keeping indoor heating performance, improve the defrost performance of outdoor heat converter.
In one embodiment, a kind of air-conditioning, described air-conditioning comprises: compressor, described compressing mechanism causes for compressed refrigerant; Indoor heat converter, described indoor heat converter is configured for making the cold-producing medium that leaves described compressor to carry out heat exchange; Outdoor expansion gear, described outdoor expansion gear is configured for making leaving the pressure decreased of the cold-producing medium of described indoor heat converter; Outdoor heat converter, described outdoor heat converter is positioned at the outlet side of described outdoor expansion gear, and for making described cold-producing medium and outdoor air carry out heat exchange; Reservoir, described reservoir configurations becomes for isolating gaseous refrigerant from leaving the cold-producing medium of described outdoor heat converter; The first bypass circulation, described the first bypass circulation is configured for the cold-producing medium from described compressor outlet side to guide to the entrance side of described outdoor heat converter; The first hot-blast valve, described the first hot-blast valve is positioned on described the first bypass circulation and for controlling the flow of the cold-producing medium of described the first bypass circulation of flowing through; The first induction heater, described the first induction heater is arranged in a side of described reservoir and for heating the cold-producing medium of described reservoir; And controller, described controller is configured for controlling the operation of at least described the first hot-blast valve and described the first induction heater.
In another embodiment, a kind of air-conditioning, described air-conditioning comprises: compressor, described compressing mechanism causes for compressed refrigerant; Indoor heat converter, described indoor heat converter is configured for making the cold-producing medium and the room air that leave described compressor to carry out heat exchange; Outdoor expansion gear, described outdoor expansion gear is configured for making leaving the pressure decreased of the cold-producing medium of described indoor heat converter; Outdoor heat converter, described outdoor heat converter is configured for making cold-producing medium and the outdoor air of from described outdoor expansion gear, discharging to carry out heat exchange, under predetermined condition, on described outdoor heat converter, defrosts; The first hot-blast valve, described the first hot-blast valve is configured for the cold-producing medium from described compressor outlet side to guide to the entrance side of described outdoor heat converter; Reservoir, described reservoir configurations becomes for isolating gaseous refrigerant from leaving the cold-producing medium of described outdoor heat converter, and described reservoir comprises the induction heater for heating and cooling agent that is positioned at one side; And controller, described controller is configured for controlling laser heating and defrost operation according to the temperature of described outdoor heat converter and outside air temperature, and the defrosting of indoor heating and described outdoor heat converter is carried out simultaneously.
In another embodiment, a kind of air-conditioning, described air-conditioning comprises: compressor, described compressing mechanism causes for compressed refrigerant; Indoor heat converter, described indoor heat converter is configured for making the cold-producing medium and the room air that leave described compressor to carry out heat exchange; Outdoor expansion gear, described outdoor expansion gear is configured for making leaving the pressure decreased of the cold-producing medium of described indoor heat converter; Outdoor heat converter, described outdoor heat converter is configured for making cold-producing medium and the outdoor air of from described outdoor expansion gear, discharging to carry out heat exchange, under predetermined condition, on described outdoor heat converter, defrosts; The first hot-blast valve, described the first hot-blast valve is configured for the cold-producing medium from described compressor outlet side to guide to the entrance side of described outdoor heat converter; Reservoir, described reservoir configurations becomes for isolating gaseous refrigerant from leaving the cold-producing medium of described outdoor heat converter, and described reservoir comprise be positioned at one side, for the induction heater of heating and cooling agent; And controller, described controller is configured for controlling laser heating and defrost operation and common defrost operation, described laser heating and defrost operation and described common defrost operation are hocketed, described laser heating and defrost operation are suitable for carrying out defrosting and the indoor heating of described outdoor heat converter simultaneously, and described common defrost operation is suitable for carrying out the defrosting of described outdoor heat converter.
In another embodiment, a kind of control method of air-conditioning, described method comprises: carry out for heating the normal heating operation of the interior space; When carrying out described normal heating operation, according to the temperature of the first outside air temperature and outdoor heat converter, judge whether to carry out defrost operation; When starting defrost operation, according to predetermined condition, judge whether to carry out laser heating and defrost operation; And in described laser heating and defrost operation, according to the temperature of described outdoor heat converter and defrost operation period, one of them judges whether to finish described operation.
Accompanying drawing explanation
Provided in the the accompanying drawings and the following description the detail of one or more embodiments.From these accompanying drawings and description and claim, further feature will be apparent.
Fig. 1 is the schematic diagram illustrating according to the heating circulation of the air-conditioning of embodiment.
Fig. 2 is the schematic diagram illustrating according to the reservoir of the embodiment of Fig. 1 and induction heater.
Fig. 3 is the schematic block diagram illustrating according to the air-conditioning of the embodiment of Fig. 1.
Fig. 4 is the flow chart illustrating according to the control method of the air-conditioning of the embodiment of Fig. 1.
Fig. 5 is the schematic diagram illustrating according to the circulation of the air-conditioning of embodiment.
Fig. 6 is the schematic block diagram illustrating according to the air-conditioning of Fig. 5 embodiment.
Fig. 7 is the flow chart illustrating according to the control sequence of the air-conditioning of Fig. 5 embodiment.
Fig. 8 and Fig. 9 are the flow charts illustrating according to the control method of the air-conditioning of Fig. 5 embodiment.
The specific embodiment
Now will be in detail with reference to embodiments of the present invention, the example of these embodiments illustrates in the accompanying drawings.Yet the present invention can implement with different forms, and the present invention should be contemplated to the embodiment being limited in this proposition.But, provide these embodiments, so that the present invention is clear and complete, and scope of the present invention is fully informed to those of ordinary skill in the field.
Fig. 1 is the schematic diagram illustrating according to the heating circulation of the air-conditioning 1 of embodiment.
With reference to Fig. 1, air-conditioning 1 comprises compressor 10, indoor heat converter 21, indoor fan 22, outdoor expansion gear 30, outdoor heat converter 41 and outdoor fan 42.Compressor 10 by refrigerant compression to HTHP.The cold-producing medium that indoor heat converter 21 is introduced compression is to carry out heat exchange with room air.Indoor fan 22 by through the exhaust of hot air of heat exchange to the interior space.Outdoor expansion gear 30 makes to expand into low pressure through the cold-producing medium of heat exchange.Outdoor heat converter 41 makes the cold-producing medium and the outdoor air that expand carry out heat exchange.Outdoor fan 42 is discharged into the exterior space by the cold air through heat exchange.
Particularly, heat circulation by air-conditioning 1 in the situation that, condenser is applied to indoor heat converter 21, in order to the condensation of refrigerant through compressor 10 compressions is arrived to lower temperature, evaporator application is in outdoor heat converter 41, in order to the cold-producing medium that becomes liquid phase due to pressure decreased is evaporated by outdoor expansion gear 30 simultaneously.
Thus, in heating circulation, the cold-producing medium of circulation is being flowed through before outdoor expansion gear 30 and is being had high pressure, and has low pressure after the outdoor expansion gear 30 of flowing through.Below, the cold-producing medium before the outdoor expansion gear 30 of flowing through is called high-pressure refrigerant, and outdoor expansion gear 30 cold-producing medium afterwards of flowing through is called low pressure refrigerant.
In addition, at the outlet side of compressor 10, be provided with the second bypass circulation 60 the cold-producing medium that leaves compressor 10 is guided to the entrance side of compressor 10, and on the second bypass circulation 60, be provided with the second hot-blast valve 61 to control the amount of directed cold-producing medium.
The second bypass circulation 60 can be connected to entrance side or the outlet side of reservoir 50, and reservoir 50 will be described later.
Particularly, the second hot-blast valve 61 guides to the part of refrigerant of leaving compressor 10 entrance side of compressor 10, to increase evaporating temperature and the evaporating pressure at the cold-producing medium of the porch of compressor 10, thereby reduces to input to the input power of compressor 10.
In addition, cold-producing medium is conducted through the second hot-blast valve 61, thereby has eliminated the imbalance between the capacity of compressor 10 and the capacity of indoor heat converter 21.
In addition, at the outlet side of compressor 10, be provided with the first bypass circulation 70 cold-producing medium is guided to the entrance side of outdoor heat converter 41, and on the first bypass circulation 70, be provided with the first hot-blast valve 71 to control the amount of directed cold-producing medium.
Particularly, the first hot-blast valve 71 guides to outdoor heat converter 41 by the cold-producing medium with high temperature and high pressure that leaves compressor 10, to carry out the defrost process of outdoor heat converter 41.
Meanwhile, in the heating circulation of air-conditioning 1, when the first hot-blast valve 71 and the second hot-blast valve 61 are all opened, the first hot-blast valve 71 and the second hot-blast valve 61 guide respectively cold-producing medium as described above, and heating process and defrost process are carried out simultaneously.Below, this action type is called laser heating and frost removal type.
In addition, at the outlet side of indoor heat converter 21, be provided with receiver 80, temporarily to receive cold-producing medium and separated liquid refrigerant from cold-producing medium.
In addition, the outlet side at receiver 80 is provided with the 3rd bypass circulation 90 cold-producing medium is guided to the entrance side of compressor 10.On the 3rd bypass circulation 90, be provided with liquid injection valve 91 to control flow, the liquid refrigerant that leaves receiver 80 is introduced in compressor 10.
When the refrigerant temperature of the outlet side of compressor 10 reaches or during higher than critical value, liquid injection valve 91 is directed to liquid refrigerant in compressor 10, to control the refrigerant temperature of the outlet side of compressor 10 at once.
In addition, at the outlet side of outdoor heat converter 41, be provided with reservoir 50, to only the gaseous refrigerant in the middle of the cold-producing medium evaporating by outdoor heat converter 41 is introduced into compressor 10.Reservoir 50 can be approximate circle column.
In addition, in a side of reservoir 50, be provided with induction heater 100, to heat the cold-producing medium of reservoir 50.
Below, induction heater 100 is described with reference to the accompanying drawings.
Fig. 2 is the schematic diagram illustrating according to the reservoir 50 of the embodiment of Fig. 1 and induction heater 100.
With reference to Fig. 2, induction heater 100 comprises: coil 120, the generation magnetic field thereby electric current flows in coil 120; And the ceramic wafer 110 for insulating that is arranged on described coil 120 upsides.
Generally speaking, induction heater 100 is to using induced-current as the heater of thermal source, and described induced-current is produced by magnetic field.Induction heater 100 comprises electromagnet, and high-frequency alternating current is through described electromagnet.In addition, electromagnet comprises coil 120, and high frequency electric flows in coil 120.
To the heating operation of induction heater 100 be described now.
When alternating current process coil 120, on coil 120, form the time dependent ac magnetic field of direction.The magnetic line of force 122 is through the bottom of reservoir 50.Due to electromagnetic induction, induce vortex flow, thereby produce predetermined heat.
That is to say the downside that wherein has coil 120 that alternating current flows through and ceramic wafer 110 to be arranged on reservoir 50.As the ceramic wafer 110 of insulator, be arranged on the upside of coil 120, to prevent the electric current towards reservoir 50.
Although in Fig. 2, the induction heater 100 of example is arranged on reservoir 50 belows, and induction heater 100 also can be wrapped on the bottom of reservoir 50.
In the situation that induction heater 100 is arranged on reservoir 50 downsides, when high frequency electric is applied to coil 120, the magnetic line of force 122 is through the lower end 50a of reservoir 50.So, on the downside of reservoir 50, produce induced-current, thereby produce predetermined heat.
In order to make induction heater 100 can heat reservoir 50, at least the lower end 50a of reservoir 50 must be formed by the composition of the diamagnetic line of force 122, for example iron.
For reservoir 50, can use the pig iron, malleable cast iron, carbon steel, steel alloy and cast iron.
Here, coil 120 is arranged on the downside of reservoir 50.This is because liquid refrigerant is arranged in the bottom of reservoir 50.Therefore the heat, producing by coil 120 is directly delivered to liquid refrigerant.
Now, because induced-current only heats reservoir 50 itself, so the sensed heating of cold-producing medium in reservoir 50.Then, the evaporation of the liquid refrigerant of reservoir 50, thus isolate the cold-producing medium 51 of evaporation.Because induction heater 100 is to supply with the heater of heat by induced-current, so there is low-heat loss and high efficiency advantage
For example, by means of induction heater 100, air-conditioning 1 carries out defrost process and reaches the evaporating temperature of outdoor heat converter 41 the is about degree of-8 ℃.Compare with the defrost process of-1 ℃ of this degree that the evaporating temperature of outdoor heat converter 41 is about according to only proceeding to of prior art, the defrost performance of air-conditioning 1 is very good.
In addition, induction heater 100 can adopt contravariant structure, to control from the heat of induction heater 100 supplies.In this case, can supply different heats according to outdoor temperature and the required heat exchanger temperature of defrosting.
To describe according to laser heating and the defrost operation of the air-conditioning 1 of this embodiment now.
The in the situation that of laser heating and defrost operation,, in the situation that heating operation and defrost operation carry out simultaneously, the first hot-blast valve 71 and the second hot-blast valve 61 are all opened.So the cold-producing medium that leaves compressor 10 is conducted through the first bypass circulation 70 and the second bypass circulation 60.
In this case, the cold-producing medium being introduced in through the second bypass circulation 60 in the entrance of compressor 10 raises evaporating temperature and the evaporating pressure of the cold-producing medium of low temperature side, thereby improves the efficiency of compressor 10.
In addition, the cold-producing medium being introduced in through the first bypass circulation 70 in the entrance of outdoor heat converter 41 passes to predetermined heat the cold-producing medium of low-pressure side, thereby carries out defrost operation at outdoor heat converter 41 places.
Now, with regard to heating operation, when outdoor temperature is low, induction heater 100 can be worked.That is to say, when outdoor temperature is low, the evaporating temperature of the cold-producing medium of low-pressure side reduces.Now, the power output of compressor 10 needs to increase, and makes indoor inlet temperature be held in corresponding with the temperature of the reduction of the cold-producing medium of low-pressure side.
Yet when induction heater 100 work, predetermined heat is supplied to the cold-producing medium of low-pressure side, thereby alleviates the output load on compressor 10.
Now, with regard to defrost operation, when outdoor heat converter 41 is evaporimeter while being coated with frosting, the performance degradation of outdoor heat converter 41.Now, the first hot-blast valve 71 can be opened, thereby frosting is removed from outdoor heat converter 41.
Now, when induction heater 100 work, more heat is delivered to the cold-producing medium of low-pressure side, thereby can improve defrost performance.
That is to say, the cold-producing medium of outdoor heat converter 41 can receive the to hang oneself heat of the high temperature refrigerant that the first bypass circulation 70 introduces, can also receive the predetermined heat from induction heater 100.
Therefore, can at short notice more heat be fed to outdoor heat converter 41 for giving evaporator defrost.
Now by the heating circulation of describing according to the air-conditioning 1 of another embodiment.
In the heating operation of this air-conditioning 1, on the refrigerant tubing that induction heater 100 can be arranged on outdoor heat converter (evaporimeter) pipeline, be connected with outdoor heat converter 41.For example, induction heater 100 can be wound around around the external peripheral surface of outdoor heat converter pipeline.
In this case, the ducted cold-producing medium of outdoor heat converter is heated, and with the outdoor heat converter 41 to carrying out defrost operation, provides more heat, thereby improves defrosting efficiency.
Alternately, induction heater 100 can be set to receiver 80.Equally, induction heater 100 can be attached to a side of receiver 80.
Equally, when predetermined heat is fed to receiver 80 by induction heater 100, just can add the cold-producing medium in hot receiver 80.
Therefore,, in receiver 80, gaseous refrigerant and liquid refrigerant are easily separated from each other.
Fig. 3 is the schematic block diagram illustrating according to the air-conditioning 1 of the embodiment of Fig. 1.Fig. 4 is the flow chart illustrating according to the control method of the air-conditioning 1 of Fig. 1 embodiment.
With reference to Fig. 3 and Fig. 4, air-conditioning 1 comprises compressor 10, indoor fan 22, outdoor fan 42 and outdoor expansion gear 30.Compressor 10 compressed refrigerants.Indoor fan 22 is arranged on a side of indoor heat converter 21, so that the air venting through heat exchange is arrived to the interior space.Outdoor fan 42 is arranged on a side of outdoor heat converter 41, so that outdoor air flows.Outdoor expansion gear 30 by the Pressure Drop of cold-producing medium that leaves indoor heat converter 21 to predetermined pressure.
Air-conditioning 1 also comprises the second hot-blast valve 61 and the first hot-blast valve 71.The second hot-blast valve 61 guides to the cold-producing medium from compressor 10 outlet sides the entrance side of compressor 10.The first hot-blast valve 71 guides to the cold-producing medium of the outlet side from compressor 10 entrance side of outdoor heat converter 41.
On the surface of outdoor heat converter 41, be provided with the frosting on outdoor heat converter temperature sensor 43，Yi sensing chamber outer heat-exchanger 41.In the situation that being provided with a plurality of outdoor heat converter 41, outdoor heat converter temperature sensor 43 also can be provided with a plurality of.
A side at the off-premises station (not shown) of storage chamber outer heat-exchanger 41 is provided with outside air temperature sensor 44, with the temperature of sensing outdoor air.
According to the temperature being sensed by outdoor heat converter temperature sensor 43 and outside air temperature sensor 44, control the operation of air-conditioning 1.
Air-conditioning 1 also comprises the controller 200 of the operation of controlling this structure.The temperature that controller 200 can sense according to outdoor heat converter temperature sensor 43 and outside air temperature sensor 44 is controlled the operation of induction heater 100 and outdoor fan 42.
Equally, controller 200 can be controlled the operation of indoor fan 22, the first hot-blast valve 71 and the second hot-blast valve 61, compressor 10 and outdoor expansion gear 30.
Now with reference to Fig. 4, the heating of air-conditioning 1 and the control method of defrost operation are described.
In operation S10, air-conditioning 1 is circulated and is carried out normal heating operation by heating.
In this case, in operation S11, judge whether to carry out laser heating and defrost operation, to carry out the defrosting of indoor heating and outdoor heat converter 41 simultaneously.
Surface temperature THex and outside air temperature Tair by outdoor heat converter temperature sensor 43 and outside air temperature sensor 44 sensing outdoor heat converters 41.In operation S 12, at outside air temperature Tair, be 0 ℃ or higher than 0 ℃ in the situation that, when the temperature T Hex of outdoor heat converter 41 is during lower than-7 ℃, in operation S15, carry out laser heating and defrost operation to carry out heating operation and defrost operation simultaneously.
In operation S13, at outside air temperature Tair, it is-5 ℃ or lower than-5 ℃ in the situation that, when the temperature T Hex of outdoor heat converter 41 is when deducting 11 ℃ of temperature that obtain from outside air temperature Tair, in operation S15, carry out laser heating and defrost operation.Simultaneously, in operation S14, at outside air temperature Tair between between-5 ℃ and 0 ℃ in the situation that, when the temperature T Hex of outdoor heat converter 41 is when deducting 8 ℃ of temperature that obtain from outside air temperature Tair, in operation S15, carry out laser heating and defrost operation.
As mentioned above, the temperature of the outdoor heat converter 41 defrosting changes according to outside air temperature, and this is that the evaporating temperature of outdoor heat converter 41 also reduces because when outside air temperature reduces.
Yet, the control of air-conditioning 1 is not limited to the temperature value under above-mentioned condition, temperature value can change according to the defrost performance of expectation and heating performance.By controller 200, pre-determine described temperature value.
From operation S12 to S14, when laser heating and defrost operation start, controller 200 makes indoor fan 22 low-speed runnings.In this case, in operation S16, the amount of carrying out the air of heat exchange by indoor heat converter 21 will reduce.
The second hot-blast valve 61 is opened, so that the cold-producing medium of discharging from compressor 10 is directed to the entrance side of compressor 10.In this case, in operation S17, increased evaporating temperature and the evaporating pressure of low-pressure side cold-producing medium.
The first hot-blast valve 71 is opened, so that the cold-producing medium of discharging from compressor 10 is directed to the entrance side of outdoor heat converter 41.In this case, in operation S18, high temperature refrigerant is introduced in outdoor heat converter 41, to improve the defrosting efficiency on outdoor heat converter 41.
In operation S19, outdoor expansion gear 30 is opened completely, and the On/Off of controlling compressor 10 is to remain on the discharge temperature of compressor 10 about 60 ℃.
Its reason is, when the first hot-blast valve 71 and the second hot-blast valve 61 and outdoor expansion gear 30 are all opened, the flow of the cold-producing medium circulating in circulation changes, and the discharge temperature of compressor 10 may be changed.
In operation S20, when the discharge temperature of compressor 10 reaches about 60 ℃, the temperature that is fed to the air of the interior space may become about 35 ℃.
In operation S21, utilize outside air temperature sensor 44 sensing outside air temperatures.Outside air temperature in operation in S12 to S14 is called the first outside air temperature, and outside air temperature in operation S21 is called the second outside air temperature.
In operation S22, when the second outside air temperature is during higher than 0 ℃, in operation S23, outdoor fan 42 normal operations, and close induction heater 100.
Yet in operation S22, the second outside air temperature is 0 ℃ or lower than 0 ℃, at operation S24Zhong， close chamber external fan 42, and open induction heater 100.
Here, in the second outside air temperature, higher than 0 ℃ in the situation that, outdoor air contributes to outdoor heat converter 41 defrostings, so outdoor heat converter 41 normal operations, to obtain defrosting energy from outdoor air.
Now, in the second outside air temperature, be 0 ℃ or lower than 0 ℃ in the situation that, outdoor air may have a negative impact to the defrosting efficiency of outdoor heat converter 41, so close chamber's outer heat-exchanger 41, and induction heater 100 work to provide heat for defrosting.
In operation S25, judge whether to finish laser heating and defrost operation.In operation S26, when the surface temperature THex of outdoor heat converter 41 is 2 ℃ or during higher than 2 ℃, in operation S28, finish laser heating and defrost operation.Yet, when the surface temperature THex of outdoor heat converter 41 is during lower than 2 ℃, in operation S27, judge whether laser heating and defrosting period through 12 minutes.
Through 12 minutes in the situation that, finish laser heating and defrost operation.Not yet through 12 minutes in the situation that, executable operations S16 and operation below thereof again.
2 ℃ of temperature and 12 minutes periods are predetermined value, and they are controlled by controller 200.Yet this predetermined temperature and period can change according to the heating of air-conditioning and defrost performance.
When laser heating and defrost operation finish, in operation S29, carry out there is no the normal heating control of the normal heating operation of defrosting.Although not shown, when carrying out normal heating control, indoor fan 22 normal operations, and the first hot-blast valve 71 and the second hot-blast valve 61 are closed.
In addition, with normal mode, control compressor 10, outdoor expansion gear 30, outdoor fan 42 and induction heater 100.
As mentioned above, the condition according to outside air temperature and outdoor heat converter temperature, judges whether to carry out laser heating and defrost operation.In addition,, according to the temperature of outdoor heat converter and laser heating and defrost operation period, judge whether to finish laser heating and defrost operation.
According to above control method, can carry out laser heating operation and defrost operation simultaneously.And, can the operation by induction heater 100 improve heating and defrosting efficiency, and laser heating and defrost operation controlled according to the multiple condition of real-time change, therefore make the energy consumption in defrost operation minimum.
In addition, do not need to carry out the conversion of Air-conditioning Cycle yet, need to not be transformed into kind of refrigeration cycle from heating circulation, thereby the reliability of heat pump performance improves.
Fig. 5 is the schematic diagram illustrating according to the Air-conditioning Cycle of embodiment.Fig. 6 is the schematic block diagram illustrating according to the air-conditioning 1 of Fig. 5 embodiment.Fig. 7 is the flow chart illustrating according to the control sequence of the air-conditioning 1 of Fig. 5 embodiment.Fig. 8 and Fig. 9 are the flow charts illustrating according to the control method of the air-conditioning of Fig. 5 embodiment.
With reference to Fig. 5 to Fig. 9, in a side of compressor 10, be provided with cross valve 15, to control the flow direction of cold-producing medium.In addition, the formation of the formation of this circulation and the embodiment of Fig. 1 is identical.Therefore, by those parts identical in the description of omitting with the embodiment of Fig. 1.
Particularly, when air-conditioning 1 normally heats circulation or laser heating and defrost operation, cold-producing medium is through being introduced in indoor heat converter 21 after compressor 10.
Then, cold-producing medium, through outdoor expansion gear 30, outdoor heat converter 41 and cross valve 15, then arrives reservoir 50, and again enters compressor 10.Now, can carry out normal heating control or laser heating and defrost operation.
Now, when air-conditioning 1 is carried out common defrost operation, cold-producing medium is through being introduced in outdoor heat converter 41 to carry out kind of refrigeration cycle after compressor 10.
Then, cold-producing medium, through outdoor expansion gear 30, indoor heat converter 21 and cross valve 15, then arrives reservoir 50, and again enters compressor 10.In this case, can carry out common defrost operation.
As mentioned above, can control heating circulation and kind of refrigeration cycle by closing/open cross valve 15.
With reference to Fig. 6, according to the air-conditioning 1 of this embodiment, comprise compressor 10, indoor fan 22, outdoor fan 42 and outdoor expansion gear 30.Compressor 10 compressed refrigerants.Indoor fan 22 is arranged on a side of indoor heat converter 21, so that the air venting through heat exchange is arrived to the interior space.Outdoor fan 42 is arranged on a side of outdoor heat converter 41, so that outdoor air flows.Outdoor expansion gear 30 by the Pressure Drop of cold-producing medium that leaves indoor heat converter 21 to predetermined pressure.
Air-conditioning 1 also comprises the second hot-blast valve 61 and the first hot-blast valve 71.The second hot-blast valve 61 guides to the cold-producing medium from compressor 10 outlet sides the entrance side of compressor 10.The first hot-blast valve 71 guides to the cold-producing medium from compressor 10 outlet sides the entrance side of outdoor heat converter 41.
On the surface of outdoor heat converter 41, be provided with the frosting on outdoor heat converter temperature sensor 43，Yi sensing chamber outer heat-exchanger 41.In the situation that being provided with a plurality of outdoor heat converter 41, outdoor heat converter temperature sensor 43 also can be provided with a plurality of.
A side at the off-premises station (not shown) of storage chamber outer heat-exchanger 41 is provided with outside air temperature sensor 44, with the temperature of sensing outdoor air.
According to the temperature being sensed by outdoor heat converter temperature sensor 43 and outside air temperature sensor 44, control the operation of air-conditioning 1.
Air-conditioning 1 also comprises cross valve 15.Cross valve 15 is arranged on a side of compressor 10, at entrance side or the outlet side of compressor 10, to control the flow direction of cold-producing medium.
Air-conditioning 1 also comprises the controller 200 of the operation of controlling this structure.That is to say, can carry out according to the temperature being sensed by outdoor heat converter temperature sensor 43 and outside air temperature sensor 44 operation of control room external fan 42 and induction heater 100.
Equally, the operation of controller 200 control room internal fans 22, cross valve 15, the first hot-blast valve 71 and the second hot-blast valve 61, compressor 10 and outdoor expansion gear 30.
Fig. 7 is the flow chart illustrating according to the control sequence of the air-conditioning of Fig. 5 embodiment.Fig. 8 is the flow chart illustrating according to the control method of the air-conditioning 1 of Fig. 5 embodiment.
With reference to Fig. 7 and Fig. 8, according to the air-conditioning 1 of this embodiment, can alternately carry out normal heating control, laser heating and defrost operation and common defrost operation.Normal heating is controlled for carrying out the heating circulation for indoor heating.Laser heating and defrost operation for carry out indoor heating and defrost operation simultaneously in the situation that the first hot-blast valve 71 is opened.Common defrost operation for carrying out kind of refrigeration cycle (contrary heating circulation) in the situation that not carrying out indoor heating.
Particularly, normal heating control and laser heating and defrost operation can alternately be carried out.In this process, when laser heating and defrost operation have carried out pre-determined number or more times while counting, or when outside air temperature Tair be predetermined value or when higher, can carry out existing defrost operation.
With reference to Fig. 7, control air-conditioning 1, make, when normal heating control and laser heating and defrost operation are carried out respectively 10 times, to carry out common defrost operation 1 time.This process can repeat.
The number of repetition of laser heating and defrost operation is not limited to this, but can change according to needed defrosting and heating operation.
Now with reference to Fig. 8, describe the control method of air-conditioning 1 in detail.
In operation S31, when air-conditioning 1 work, carry out heating circulation and control for the normal heating of normal heating operation.
That is to say, that controls cross valve 15 closes/opens to carry out heating circulation.With normal mode, control compressor 10, indoor fan 22, outdoor fan 42, outdoor expansion gear 30 and induction heater 100.Close the first hot-blast valve 71 and the second hot-blast valve 61.
In operation S32, judge whether to carry out defrost operation.
Particularly, by surface temperature THex and the outside air temperature Tair of outdoor heat converter temperature sensor 43 and outside air temperature sensor 44 sensing outdoor heat converters 41.
In operation S33, at outside air temperature Tair, be 0 ℃ or higher than 0 ℃ in the situation that, when the temperature T Hex of outdoor heat converter 41 is lower than approximately-7 ℃ time, in operation S36, can start defrost operation.
In operation S34, at outside air temperature Tair, be-5 ℃ or lower than-5 ℃ in the situation that, when the temperature T Hex of outdoor heat converter 41 is when deducting 11 ℃ of resulting temperature from outside air temperature Tair, in operating S36, can carry out defrost operation.Now, in operation S35, at outside air temperature Tair between approximately between-5 ℃ and about 0 ℃ in the situation that, when the temperature T Hex of outdoor heat converter 41 is when deducting 8 ℃ of resulting temperature from outside air temperature Tair, in operation S36, can carry out defrost operation.Here, outside air temperature Tair is called the first outside air temperature.
For determining with phasing is same really according to the first outside air temperature of Fig. 1 embodiment according to the first outside air temperature of this embodiment.
As mentioned above, for the temperature of outdoor heat converter 41 defrosting, according to the first outside air temperature, change, its reason is, when outside air temperature reduces, the evaporating temperature of outdoor heat converter 41 also reduces.
Yet, the control of air-conditioning 1 is not limited to temperature value under these conditions, and described temperature value can change according to the defrost performance of expectation and heating performance.Described temperature value is pre-determined by controller 200.
Judgement is carry out laser heating and defrost operation or carry out common defrost operation.In operation S37, as mentioned above, laser heating and defrost operation can be for carry out heating operation and defrost operation simultaneously, and common defrost operation can carry out in kind of refrigeration cycle.
Particularly, in operation S38, judge laser heating and defrost operation whether executed 10 times or more times.When this operation execution number of times is less than 10 times, in operation S40, carry out laser heating and defrost operation.When this operation executed 10 times or more times, in operation S39, judge that whether outside air temperature Tair is-10 ℃ or higher than-10 ℃.
When outside air temperature Tair is-10 ℃ or during higher than-10 ℃, in operation S40, carry out laser heating and defrost operation.When outside air temperature Tair is during lower than-10 ℃, in operation S44, carry out common defrost operation.Herein, outside air temperature Tair is called the 3rd outside air temperature.
The reference value (10 ℃) of the number of repetition of laser heating and defrost operation (10 times) and the 3rd outside air temperature is not limited to this, but can heating performance and defrost performance as required change.
When considering heating performance and defrost performance, the number of repetition of laser heating and defrost operation can be greater than the number of repetition of common defrost operation.
Now by the control method being described in the situation of laser heating and defrost operation, but this does not illustrate in the accompanying drawings.
The second hot-blast valve 61 is opened, the cold-producing medium of discharging from compressor 10 is directed to the entrance side of compressor 10.In this case, evaporating temperature and the evaporating pressure of low-pressure side cold-producing medium have been increased.
The first hot-blast valve 71 is opened, the cold-producing medium of discharging from compressor 10 is directed to the entrance side of outdoor heat converter 41.In this case, high temperature refrigerant is incorporated in outdoor heat converter 41, to improve the defrosting efficiency on outdoor heat converter 41.
When the first hot-blast valve 71 and the second hot-blast valve 61 and the 30 whole unlatching of outdoor expansion gear, the changes in flow rate of the cold-producing medium circulating in circulation, thereby the discharge temperature of controlled compressor processed 10.
When the discharge temperature of compressor 10 reaches about 60 ℃, the temperature that is fed to the air of the interior space can become about 35 ℃.
Utilize outside air temperature sensor 44 sensing outside air temperatures.Herein, outside air temperature is called the second outside air temperature, and this is the same with the second outside air temperature according to Fig. 1 embodiment.
When the second outside air temperature is during higher than 0 ℃, outdoor fan 42 normal operations, and induction heater 100 cuts out.
Yet the second outside air temperature is 0 ℃ or lower than 0 ℃，Ze close chamber external fan 42, and opens induction heater 100.
Herein, in the second outside air temperature, higher than 0 ℃ in the situation that, outdoor air contributes to outdoor heat converter 41 defrostings, so outdoor heat converter 41 normal operations are to obtain defrosting energy from outdoor air.
Now, in the second outside air temperature, it is 0 ℃ or lower than 0 ℃ in the situation that, outdoor air may have a negative impact to the defrosting efficiency of outdoor heat converter 41, so close chamber's outer heat-exchanger 41, and makes induction heater 100 work to be provided for the heat of defrosting.
In operation S41, judge whether to finish laser heating and defrost operation.In operation S42, when the surface temperature THex of outdoor heat converter 41 is 2 ℃ or during higher than 2 ℃, in operation S48, finish laser heating and defrost operation.Yet, when the surface temperature THex of outdoor heat converter 41 is during lower than 2 ℃, in operation S43, judge whether laser heating and defrosting period through 12 minutes.
Through 12 minutes in the situation that, finish laser heating and defrost operation.Not yet through 12 minutes in the situation that, again carry out laser heating and defrost operation.
2 ℃ of temperature and 12 minutes periods of defrosting are predetermined value, and they are controlled by controller 200.Yet this predetermined temperature and period can change according to the heating of air-conditioning and defrost performance.
To be described in now in operation S39 when the 3rd outside air temperature is during lower than-10 ℃, in operating S44, carry out the control method in common defrost operation situation.
First, control cross valve 15 closes/opens to carry out kind of refrigeration cycle.Then, close chamber's internal fan 22 is incorporated into cold air in the interior space preventing, close chamber's external fan 42 has a negative impact to defrosting to prevent outdoor air simultaneously.
In addition, increase the frequency of compressor 10, and open indoor expansion gear (not shown), and outdoor expansion gear 30 is opened completely.
In operation S45, judge whether to finish common defrost operation.
Particularly, when the surface temperature THex of outdoor heat converter 41 is 25 ℃ or during higher than 25 ℃, in operation S48, finish common defrost operation.When the surface temperature THex of outdoor heat converter 41 is during lower than 25 ℃, in operation S47, judge whether the defrosting period through 12 minutes.
When the defrosting periods of 12 minutes past tense, in operation S48, finish common defrost operation.When defrosting period past tense not yet, can still carry out common defrost operation.
In operation S48, when finishing laser heating and defrost operation or common defrost operation, in operation S49, carry out for not having the normal heating of the normal heating operation of defrosting to control.Above process shows, carries out one-time continuous heating and defrost operation or common defrost operation in normal heating process.
In a word, according to the embodiment of Fig. 1, according to predetermined condition, repeat to control laser heating and defrost operation and normal heating operation.According to the embodiment of Fig. 5, according to having increased the process of optionally controlling common defrost operation in the process of the embodiment of Fig. 1.
Therebetween, although not shown, in normal heating process, that controls cross valve 15 closes/opens the circulation that heats.
In addition, with normal mode control room internal fan 22, and close the first hot-blast valve 71 and the second hot-blast valve 61.In addition, with normal mode, control compressor 10, outdoor expansion gear 30, outdoor fan 42 and induction heater 100.
As mentioned above, according to the surface temperature of outdoor heat converter 41 and defrosting period, control common defrost operation, thereby remove, remain in the lip-deep frosting of outdoor heat converter 41.
Its reason is in heating operation and laser heating and defrost operation, to only have heat to be seldom fed to outdoor heat converter 41 for defrosting, therefore can not be able to defrost thoroughly.
Yet, in the situation that carrying out common defrost operation, do not heat, but can improve defrost performance.
In a word, alternately carry out laser heating and the defrost operation that can improve heating performance and the common defrost operation that can improve defrost performance, thereby effectively keep heating and defrost performance.
According to described embodiment, induction heater is arranged on a side of reservoir, and the heat the shortening heat that to reduce, are lost to outdoor air are delivered to the time of cold-producing medium from induction heater.
In addition, because the service life of induction heater itself is very long, thereby can guarantee the reliability of heater.When contravariant structure applications during in induction heater, can be controlled to heat according to outside air temperature.
In addition, in heating process, heat is fed to the cold-producing medium of heating circulation mesolow side from induction heater, make it possible to improve heating performance in the situation that further not increasing compressor power output.
In addition, the frosting that induction heater is worked and covered evaporimeter for removing in defrost process, makes more heat can be passed to the cold-producing medium of low-pressure side.Therefore, can improve the defrost performance of air-conditioning.
In addition, according to the temperature of outside air temperature and outdoor heat converter, optionally carry out laser heating and the defrost operation that normal heating is controlled or heated simultaneously and defrost, therefore improved defrost performance and the indoor heating performance of outdoor heat converter.
In addition, can simultaneously and effectively heat and defrost, and without changing between heating circulation and kind of refrigeration cycle for the defrosting of outdoor heat converter, therefore also not need to control cross valve.Can improve the reliability of product like this.
In addition, although frosting may be remained on outdoor heat converter owing to utilizing a small amount of heat to defrost, by replacing to carry out common defrost operation, just can improve defrost performance in laser heating and defrost operation.
Although described above-mentioned embodiment with reference to a large amount of illustrated embodiment of the present invention, but should be understood that, still can make other many modifications and remodeling by those of ordinary skills, these modifications and remodeling all will fall in the spirit and scope of the present invention.More specifically, can be in the scope of this description, accompanying drawing and claims aspect the arranging of parts and/or main combination configuration, make multiple remodeling and modification.Except the remodeling at parts and/or aspect arranging with revising, alternative use is also apparent for those of ordinary skills.
Claims (11)
1. an air-conditioning, described air-conditioning comprises:
Compressor, described compressing mechanism causes for compressed refrigerant;
Indoor heat converter, described indoor heat converter is configured for making the cold-producing medium and the room air that leave described compressor to carry out heat exchange;
Outdoor expansion gear, described outdoor expansion gear is configured for making leaving the pressure decreased of the cold-producing medium of described indoor heat converter;
Outdoor heat converter, described outdoor heat converter is configured for making cold-producing medium and the outdoor air of from described outdoor expansion gear, discharging to carry out heat exchange, under predetermined condition, on described outdoor heat converter, defrosts;
The first hot-blast valve, described the first hot-blast valve is configured for the cold-producing medium from described compressor outlet side to guide to the entrance side of described outdoor heat converter;
Reservoir, described reservoir configurations becomes for isolating gaseous refrigerant from leaving the cold-producing medium of described outdoor heat converter, and described reservoir comprise be positioned at one side, for the induction heater of heating and cooling agent; And
Controller, described controller is configured for controlling laser heating and defrost operation according to the temperature of described outdoor heat converter and outside air temperature, and the defrosting of indoor heating and described outdoor heat converter is carried out simultaneously,
Wherein, when the temperature value of described outdoor heat converter is not in predetermined temperature range, can determine whether described laser heating and defrost operation finish according to the operating time of described laser heating and defrost operation.
2. air-conditioning as claimed in claim 1, wherein, described controller is controlled described the first hot-blast valve, makes to open at the first hot-blast valve described in described laser heating and defrost operation.
3. air-conditioning as claimed in claim 1, also comprises:
The second hot-blast valve, described the second hot-blast valve is configured for the cold-producing medium from described compressor outlet side to guide to the entrance side of described compressor,
Wherein, described controller is controlled described the second hot-blast valve, makes to open at the second hot-blast valve described in described laser heating and defrost operation.
4. air-conditioning as claimed in claim 1, wherein, in described laser heating and defrost operation, described controller is controlled the operation of the fan of off-premises station according to outside air temperature.
5. air-conditioning as claimed in claim 1, wherein, in described laser heating and defrost operation, described controller is controlled the operation of described induction heater according to outside air temperature.
6. a control method for air-conditioning, described method comprises:
Carry out for heating the normal heating operation of the interior space;
When carrying out described normal heating operation, according to the temperature of the first outside air temperature and outdoor heat converter, judge whether to carry out defrost operation;
When starting defrost operation, according to predetermined condition, judge whether to carry out laser heating and defrost operation; And
In described laser heating and defrost operation, according to the temperature of described outdoor heat converter and defrost operation period, one of them judges whether to finish described operation,
Wherein, when the temperature value of described outdoor heat converter is not in predetermined temperature range, can determine whether described laser heating and defrost operation finish according to the operating time of described laser heating and defrost operation.
7. method as claimed in claim 6, is also included in and in described laser heating and defrost operation, detects the second outside air temperature.
8. method as claimed in claim 7, wherein, when described the second outside air temperature is 0 ℃ or during lower than 0 ℃, closes the fan of off-premises station, and opens induction heater.
9. method as claimed in claim 6, also comprises when judging when starting described defrost operation and carries out common defrost operation while not carrying out described laser heating and defrost operation.
10. method as claimed in claim 9, wherein, in the situation that the number of times of described laser heating and defrost operation is for 10 times or situation and the 3rd outside air temperature, lower than one of situation of-10 ℃, are carried out described common defrost operation more frequently.
11. methods as claimed in claim 9, wherein, in described common defrost operation, according to the temperature of described outdoor heat converter and common defrost operation period, one of them judges whether to finish described common defrost operation.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2008-0024694 | 2008-03-18 | ||
| KR10-2008-0024695 | 2008-03-18 | ||
| KR1020080024695A KR20090099613A (en) | 2008-03-18 | 2008-03-18 | Air conditioner and control method thereof |
| KR10-2008-0024693 | 2008-03-18 | ||
| KR1020080024694A KR100929192B1 (en) | 2008-03-18 | 2008-03-18 | Air conditioner |
| KR1020080024693A KR100997284B1 (en) | 2008-03-18 | 2008-03-18 | Air conditioner and control method thereof |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101790026A Division CN101539348B (en) | 2008-03-18 | 2008-11-21 | Air conditioner and control method thereof |
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| CN102175052A CN102175052A (en) | 2011-09-07 |
| CN102175052B true CN102175052B (en) | 2014-03-12 |
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| CN201110106934.XA Expired - Fee Related CN102175052B (en) | 2008-03-18 | 2008-11-21 | Air conditioner and control method thereof |
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| CN103528142B (en) * | 2012-07-05 | 2016-02-03 | 珠海格力电器股份有限公司 | Antifrost air-conditioning and control method thereof |
| JP6466682B2 (en) * | 2014-10-15 | 2019-02-06 | シャープ株式会社 | Air conditioner |
| CN104949409B (en) * | 2015-07-13 | 2017-03-29 | 金鑫 | A kind of flexible air source heat pump defrosting system and method that need not start compressor |
| CN109386982B (en) * | 2018-09-27 | 2020-06-12 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
| CN112611073A (en) * | 2020-11-30 | 2021-04-06 | 青岛海尔空调电子有限公司 | Air conditioning system and defrosting control method, storage medium and control device thereof |
| CN112611074A (en) * | 2020-11-30 | 2021-04-06 | 青岛海尔空调电子有限公司 | Air conditioning system and defrosting control method, storage medium and control device thereof |
| CN113074474B (en) * | 2021-04-12 | 2022-06-07 | 长虹美菱股份有限公司 | Intermediate liquid collection energy storage evaporator and efficient refrigerating system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1204029A (en) * | 1997-06-27 | 1999-01-06 | 三星电子株式会社 | Defrosting apparatus of air conditioner and method thereof |
| CN1113196C (en) * | 1997-12-18 | 2003-07-02 | 富士通将军股份有限公司 | Air conditioner control method and apparatus of same |
| CN1517626A (en) * | 2003-01-10 | 2004-08-04 | 松下电器产业株式会社 | Air conditioner and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002107014A (en) * | 2000-10-04 | 2002-04-10 | Sharp Corp | Air conditioner |
| JP2005083704A (en) * | 2003-09-10 | 2005-03-31 | Mitsubishi Electric Corp | Refrigerating cycle and air conditioner |
| KR100821728B1 (en) * | 2006-08-03 | 2008-04-11 | 엘지전자 주식회사 | Air conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204029A (en) * | 1997-06-27 | 1999-01-06 | 三星电子株式会社 | Defrosting apparatus of air conditioner and method thereof |
| CN1113196C (en) * | 1997-12-18 | 2003-07-02 | 富士通将军股份有限公司 | Air conditioner control method and apparatus of same |
| CN1517626A (en) * | 2003-01-10 | 2004-08-04 | 松下电器产业株式会社 | Air conditioner and its control method |
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| Title |
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| JP特开2002-107014A 2002.04.10 |
| JP特开2005-83704A 2005.03.31 |
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