CN1199160A - Air conditioner for combined use of cooler and heater and controlling method therefor - Google Patents
Air conditioner for combined use of cooler and heater and controlling method therefor Download PDFInfo
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- CN1199160A CN1199160A CN98108812A CN98108812A CN1199160A CN 1199160 A CN1199160 A CN 1199160A CN 98108812 A CN98108812 A CN 98108812A CN 98108812 A CN98108812 A CN 98108812A CN 1199160 A CN1199160 A CN 1199160A
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- expansion valve
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- heat converter
- cold
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/04—Refrigeration circuit bypassing means
- F25B2400/0401—Refrigeration circuit bypassing means for the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2501—Bypass valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2507—Flow-diverting valves
Abstract
An air conditioner can combine to use a cooler and a heater and the control method are provided. The air conditioner comprises a cryogen circulatory system, a conversion valve and a controller, wherein an indoor heat exchanger comprises a first and a second heat exchanger components and an auxiliary expansion valve between the first and the second heat exchanger components. The controller controls cryogen to conduct cooling or heating circulation, controls a main expansion valve in a throttling state, and keeps the auxiliary expansion valve in an open state. The main expansion valve is kept in an open state and the auxiliary expansion valve is remained in a throttling state when cryogen is controlled to conduct heating circulation, thereby finishing dehumidification operation. The air conditioner can avoid over heat in indoor and can improve dehumidification effect during the process of dehumidification.
Description
The present invention relates to unite air-conditioner and the control method thereof of using cooler and heater, specifically, relate to the air-conditioner and the control method thereof that can prevent during dehumidification operation that indoor mistake is cold and improve dehumidification rate, this air-conditioner has used cooler and heater simultaneously.
Usually unite and use the air-conditioner of cooler and heater to comprise a refrigerant-cycle systems, in this system, compressor, indoor heat converter, main expansion valve and outdoor heat converter link to each other by the refrigerant tubing serial connection successively, form a closed-loop path.Air-conditioner also comprises a switching valve that is used for the cold-producing medium that compressor is discharged is fed to selectively indoor heat converter or outdoor heat converter.During heating, the cold-producing medium that compressor is discharged is fed in the indoor heat converter.Thereby the formation heat cycles, and during cooling, the cold-producing medium that compressor is discharged is fed in the outdoor heat converter, thus form cool cycles.
This air-conditioner of uniting use cooler and heater also has the dehumidification operation pattern that the moisture in the room atmosphere is removed except having cooling and heating function.During dehumidification operation, cold-producing medium flows through cooling cycle system, makes the surface temperature of indoor heat converter be lower than the dew-point temperature of air, like this, just can remove the airborne moisture with indoor heat exchange contact.Because being that the moisture in room air is more, dehumidifying do not need finishing under the indoor situation about cooling off, so indoor fan shut-down operation or with low-speed handing.
But the cold air around indoor heat converter can be fed in the room inevitably, can cause the cold excessively of indoor temperature thus.In addition, because fan is with low-speed handing, the heat transfer efficiency of indoor heat converter is not high, thereby dehumidification rate reduces, and needs a large amount of dehumidifying time could obtain required humidity like this.
Simultaneously, carry out in the winter time between the period of heating,,, in this case, regularly defrost, so that frost is removed so on the surface of the indoor heat converter that is used as evaporimeter, have a lot of frosts because outdoor temperature is lower.Because defrosting is by the cold-producing medium realization that circulate in refrigeration system, so can occur cold air on every side at indoor heat converter inevitably.Therefore, indoor temperature reduces, and the efficiency of heating surface is reduced.
In order to overcome the problems referred to above, the object of the present invention is to provide a kind of air-conditioner and control method thereof of using cooler and heater of uniting, can prevent that thus indoor mistake is cold and during dehumidifying, improve dehumidification rate.
Another object of the present invention is to provide a kind of air-conditioner and control method thereof of using cooler and heater of uniting, and can prevent during defrosting that thus indoor temperature from reducing.
In order to realize above-mentioned purpose of the present invention, the provided by the invention associating uses the air-conditioner of cooler and heater to comprise: a refrigerant-cycle systems that forms the closed-loop path, in this system, compressor, indoor heat converter, main expansion valve and outdoor heat converter link to each other by refrigerant tubing successively; A switching valve that is used to select heat cycles or cool cycles, during heat cycles, the cold-producing medium that compressor is discharged is supplied to indoor heat converter, during cool cycles, cold-producing medium is supplied to outdoor heat converter; An indoor fan and an outdoor fan, these two fans are adjacent to be respectively fixed on indoor heat converter and the outdoor heat converter; And controller that is used to control compressor, valve and fan; Wherein indoor heat converter comprises first and second heat exchanger components of serial connection, and an auxiliary expansion valve that is arranged between first and second heat exchanger components; Controller control cold-producing medium carries out cool cycles or carries out heat cycles, also main expansion valve is controlled at throttle simultaneously, and will assist expansion valve to be controlled at full open position, finish cooling down operation and heating operation thus respectively, and when the control cold-producing medium carries out heat cycles, main expansion valve is controlled at full open position, will assists expansion valve to be controlled at throttle, thereby finish dehumidification operation.
Air-conditioner also comprises: one from being arranged on the bypass pipe that tap on the refrigerant tubing between main expansion valve and the outdoor heat converter is come out and had pressure in its end; And by-passing valve that is arranged in the above-mentioned bypass pipe.During dehumidifying, controller is preferably controlled by-passing valve and is in opening.During dehumidifying, controller control room internal fan turns round, and the control room external fan shuts down, and improves dehumidification rate thus.
During heating operation, when becoming predetermined defrost operation, controller makes cold-producing medium reverse, allows cold-producing medium carry out cool cycles, and controls main expansion valve to closed condition, and the control by-passing valve carries out defrost operation to outdoor heat converter thus to opening.
This air-conditioner also comprises: an outdoor temperature detector and a yard piping Temperature Detector that is used to detect the yard piping temperature that is arranged between expansion valve and the outdoor heat converter that is used to detect outdoor temperature.During heating operation, when the temperature difference between outdoor temperature and the yard piping temperature reaches a certain numerical value or during greater than this value, controller is preferably judged has needed defrost operation, and carries out defrost operation.Simultaneously, when the yard piping temperature is an a certain numerical value or when being higher than this value, controller is preferably judged and has been reached the defrost operation halt that defrost operation is stopped, recover heating operation this moment, in defrost operation dwell time and heating operation preferably arranged time prepause that compressor is shut down between recovery time.During defrosting,, just can prevent that indoor temperature from reducing if indoor fan and outdoor fan all shut down.
This air-conditioner also comprises: one is used to detect the interior conduit Temperature Detector that is arranged on the interior conduit temperature between the auxiliary expansion valve and second heat exchanger component; With an input channel Temperature Detector that is used to detect the temperature of the cold-producing medium input channel that links to each other with compressor.During dehumidifying, controller is preferably controlled auxiliary expansion valve, and the temperature difference between input channel temperature and the interior conduit temperature is remained in the predetermined allowed band.In the temperature difference is lower limit or during less than allowed band, carries out this control by the aperture that reduces auxiliary expansion valve, is higher limit or during greater than allowed band in the temperature difference, carries out this control by increasing auxiliary expansion valve opening.
This air-conditioner also comprises: one is used to detect the interior conduit Temperature Detector that is arranged on the interior conduit temperature between the auxiliary expansion valve and second heat exchanger component; With an input channel Temperature Detector that is used to detect the temperature of the cold-producing medium input channel that links to each other with compressor.During cooling, controller is preferably controlled main expansion valve, so that the temperature difference between input channel temperature and the interior conduit temperature is remained in the predetermined allowed band.In the temperature difference is lower limit or during less than allowed band, carries out this control by the aperture that reduces main expansion valve, is higher limit or during greater than allowed band in the temperature difference, carries out this control by the aperture that increases main expansion valve.
This air-conditioner also comprises: a yard piping Temperature Detector that is used to detect the yard piping temperature that is arranged between main expansion valve and the outdoor heat converter; With an input channel Temperature Detector that is used to detect the temperature of the cold-producing medium input channel that links to each other with compressor.During heating operation, controller is preferably controlled main expansion valve, so that the temperature difference between input channel temperature and the yard piping temperature is remained in the predetermined allowed band.In the temperature difference is lower limit or during less than allowed band, carries out this control by the aperture that reduces main expansion valve, is higher limit or during greater than allowed band in the temperature difference, carries out this control by the aperture that increases main expansion valve.
Preferably second heat exchanger component is arranged on the upstream of first heat exchanger component in addition.
According to a further aspect in the invention, a kind of method of uniting the air-conditioner that uses cooler and heater that is used to control is provided, this air-conditioner comprises: a refrigerant-cycle systems that forms the closed-loop path, in this system, compressor, indoor heat converter, main expansion valve and outdoor heat converter link to each other by refrigerant tubing successively; A switching valve that is used to select heat cycles or cool cycles, during heat cycles, the cold-producing medium that compressor is discharged is supplied to indoor heat converter, during cooling, cold-producing medium is supplied to outdoor heat converter; An indoor fan and an outdoor fan, these two fans are adjacent to be respectively fixed on indoor heat converter and the outdoor heat converter; And controller that is used to control compressor, valve and fan; The method comprising the steps of: first and second heat exchanger components that indoor heat converter are divided into serial connection; An auxiliary expansion valve is set between first and second heat exchanger components; When the control cold-producing medium circulates in the heat cycles loop, main expansion valve is controlled at throttle and will assists expansion valve to be controlled at unlatching (non-throttling) state, carry out dehumidification operation thus.
Herein, this method also comprises the steps: during dehumidification operation, makes cold-producing medium flow to compressor from the refrigerant tubing bypass that is arranged between main expansion valve and the outdoor heat converter.During dehumidification operation, preferably indoor fan running and outdoor fan shuts down.
This method also comprises the steps: during heating operation, when predetermined defrost operation condition occurs, makes the cold-producing medium recycled back, allow cold-producing medium carry out cool cycles, the control main expansion valve is to closed condition, and the control by-passing valve carries out defrost operation to outdoor heat converter thus to opening.
This method also comprises step: detect outdoor temperature; Detection is arranged on the temperature of the yard piping between main expansion valve and the outdoor heat converter; During heating operation, when the temperature difference between outdoor temperature and the yard piping temperature reaches a certain numerical value or during greater than this value, judges to have reached the defrost operation condition.
Simultaneously, this method preferably also comprises step: when the yard piping temperature is an a certain numerical value or when being higher than this value, judge to have reached the defrost operation halt that the control defrost operation stops and recovering heating operation.
Fig. 1 is the schematic diagram of air-conditioner of the present invention, the flow of refrigerant situation during expression heating and the defrosting;
Fig. 2 is illustrated in the mobility status of cold-producing medium during the cooling of Fig. 1 and the dehumidifying;
Fig. 3 is the cutaway view of the indoor unit of Fig. 1;
Fig. 4 is the controlling party block diagram of air-conditioner of the present invention;
Fig. 5 is the explanation heating shown in Figure 1 and the flow chart of defrost operation;
Fig. 6 is the flow chart of explanation cooling down operation shown in Figure 2;
Fig. 7 is the flow chart of explanation dehumidification operation shown in Figure 2;
With reference now to accompanying drawing, describes the preferred embodiments of the present invention in detail.
As illustrated in fig. 1 and 2, air-conditioner 1 comprises and is separately positioned on outdoor and indoor outdoor unit 9 and indoor unit 3 and refrigerant-cycle systems 11, outdoor unit 9 and indoor unit 3 are connected with each other in this refrigeration system, and cold-producing medium can be circulated in this system.Refrigerant-cycle systems 11 constitutes a closed-loop path, and in this loop, compressor 31, indoor heat converter 13, outdoor heat converter 33 and main expansion valve 35 link to each other by refrigerant tubing successively.
Outdoor unit 9 comprises a shell (not shown) that compressor 31, outdoor heat converter 33 and main expansion valve 35 are housed in it.Main expansion valve 35 is used to reduce or increase the aperture of refrigerant flow path.The outdoor temperature detector 37 that is used to detect outdoor temperature is housed in shell.An outdoor fan 39 also is equipped with on the next door of outdoor heat converter 33.As shown in Figure 3, indoor unit 3 comprises that one has the air intake 4 that opening makes progress and the shell 6 of opening outlet 5 forward, and an indoor heat converter 13 that is arranged in the shell 6.Below the opening surface of air intake 4, be provided with an electrostatic (electric dust) precipitator 19.
Indoor heat converter 13 is divided into two heat exchanger components, second heat exchanger component 17 corresponding to air intake 4, the first heat exchanger components 15 corresponding to air outlet slit 5.With some heat pipes and heat transmission fin, utilize ordinary skill just can make heat exchanger component 15 and 17, wherein the side of heat-exchanging part 15 and a length direction of 17 contacts with each other, and the apart predetermined distance of the side of another length direction.Indoor fan 21 is arranged between first and second heat exchanger components 15 and 17, makes them constitute predetermined angle.Auxiliary expansion valve 23 is arranged on the pre-position of the interior conduit between first and second heat exchangers 15 and 17, so that reduce or increase the aperture of refrigerant flow path.The interior conduit Temperature Detector 25 that will be used for sensing chamber's interior conduit temperature is arranged between the auxiliary expansion valve 23 and second heat exchanger component 17.
A part that all belongs to refrigerant tubing from compressor 31 refrigerant outlet pipeline 51 of drawing and the refrigerant inlet pipeline 53 that enters compressor 31, and refrigerant tubing constitutes refrigerant-cycle systems 11, and these two pipelines contact with each other in the pre-position adjacent with compressor 31.Switching valve 55 is arranged on refrigerant outlet pipeline 51 and refrigerant inlet pipeline 53 contacted positions, and switching valve 55 makes the refrigerant flow path of drawing from compressor 31 be communicated with outdoor heat converter 33 or indoor heat converter 13.If switching valve 55 is communicated with outdoor heat converter 33, then be formed for cooling off the cool cycles of indoor heat converter 13 ambient air, this will be described in detail.If switching valve 55 is communicated with indoor heat converter 13, then form heat cycles, this also will be described in detail.
The yard piping detector 41 that will be used for sensing chamber's Outer Tube temperature is arranged on the yard piping that is in main expansion valve 35 downstreams of close outdoor heat converter 33.Inlet pipeline Temperature Detector 43 is arranged near on the refrigerant inlet pipeline 53 of compressor 31.One end of set bypass pipe 57 links to each other with refrigerant flow path between main expansion valve 35 and the outdoor heat converter 33, and its other end links to each other with refrigerant inlet pipeline 53.The by-passing valve 59 that is used to open or close refrigerant flow path is arranged on the predetermined position of bypass pipe 57.
Air-conditioner with said structure comprises the controller 61 of a microcomputer form as shown in Figure 4.The temperature detection signal that the control signal that controller 61 reception executors 63 send and inlet pipeline Temperature Detector 43, interior conduit Temperature Detector 25, yard piping Temperature Detector 41 and outdoor temperature detector 37 detect.Controller 61 is according to each signal that receives, and control constitutes the work of each parts of refrigerant-cycle systems, promptly controls the work of compressor 31, indoor fan 21, outdoor fan 39, main expansion valve 35, auxiliary expansion valve 23, switching valve 55 and by-passing valve 59.Utilize drive circuit 62 that the control signal of controller 61 outputs is sent to corresponding each parts.The design temperature state and the mode of operation of air-conditioner all are presented on the display 65.
Control method below in conjunction with the control flow chart description control air-conditioner of the present invention of Fig. 5 to 8.
By being arranged on the operation options button (not shown) on the executor 63, air-conditioner 1 of the present invention can heat, cooling and dehumidification operation.The control flow chart of Fig. 5 is represented the heating operation situation after the user has selected the heating operation key, also comprises defrost operation here.If operation beginning (Q1), controller 61 is confirmed the mode of operation (Q2) that the user selects.At first judge whether to have selected heating operation (Q3).If judge and in step (Q3), selected heating operation, then operate (S1) accordingly.If do not select heating operation, then judge whether to have selected cooling down operation and dehumidification operation (Q4 and Q5) in succession.If do not select this two kinds of operations, continue then to judge that selected operation is until surpassing the scheduled time (Q6).If in not selecting state, surpass the scheduled time, then air-conditioner shut-down operation (Q7).
If selected heating operation in step S1, controller 61 control switching valves 55 make it be communicated with indoor heat converter 13.In addition, the auxiliary expansion valve 23 of controller 61 controls is to opening, and control main expansion valve 35 is controlled by-passing valve 59 to closed condition (S2) simultaneously to throttle.After this, if drive compression machine 31 (S3), cold-producing medium is along the heat cycles path flow shown in Fig. 1 solid arrow.
That is to say, in the compressor 31 compression high temperature and high pressure gaseous refrigerant inflow indoor heat exchanger 13, in first and second heat exchanger components 15 and 17, obtain condensation after, become the cryogenic high pressure liquid refrigerant.The condensation latent heat of surrounding air absorption refrigeration agent around first and second heat exchanger components 15 and 17 then, thus environment temperature raises.Simultaneously, the liquid refrigerant that comprises gaseous refrigerant of condensation makes it obtain condensation, and offers outdoor heat converter 33 with the liquid condition of low-temp low-pressure by main expansion valve 35 in indoor heat converter 13.Liquid refrigerant evaporates in outdoor heat converter 33, absorbs latent heat from extraneous air.Therefore, the temperature that loses the extraneous air of latent heat descends, because the temperature difference between outdoor heat converter 33 and the environment temperature has steam so amass on the surface of outdoor heat converter 33.Gaseous refrigerant by outdoor heat converter 33 enters compressor and is compressed once more, so that repeat heat cycles.
During drive compression machine 31, indoor fan 21 and outdoor fan 39 are driven (S4).Indoor fan 21 and outdoor fan 39 improved respectively indoor and outdoors heat exchanger 13 and 33 and surrounding air between heat exchanger effectiveness.Herein, indoor fan 21 is supplied to the hot-air that forms around the indoor heat converter 13 in the room, thus heat rooms.
Simultaneously, during heating, the outer Temperature Detector 37 of controller 61 receiving chambers, inlet pipeline Temperature Detector 43 and yard piping Temperature Detector 41 detected temperature signals, and the temperature T of detection respective regions
Air, Ts and To (S5).Therefore with outdoor temperature T
AirO compares with the yard piping temperature T, sees that whether the temperature difference between them is 10 ℃ or low temperature (S6) more.If 10 ℃ of the temperature difference or low temperature (S6) more, then relatively temperature and the yard piping temperature T s and the To (S7) of refrigerant inlet pipeline 53.When the temperature difference between refrigerant inlet pipeline 53 and the yard piping is in allowed band, promptly during 5 ℃ ± α (α for predetermined permissible value), just remain on current state (S8).Confirm selected mode of operation then.Carry out corresponding operation repeatedly.But during greater than 5 ℃+α, increase the aperture (S11) of main expansion valve 35 in the temperature difference, reduce the condensation rate of cold-producing medium a little.During less than 5 ℃-α, reduce the aperture (S10) of main expansion valve 35 in the temperature difference, increase the condensation rate of cold-producing medium a little.The detected temperatures signal that receives according to step (S5) carries out heating operation continuously like this.
Simultaneously, if outdoor temperature T
AirAnd the temperature difference between the yard piping temperature T o is just carried out defrost operation, so that frost long-pending on the outdoor heat converter 33 is removed (P1) when being 10 ℃ or higher temperature (S6).In this case, controller 61 control switching valves 55 make valve be communicated with outdoor heat converter 33.Reduce the aperture of main expansion valve 35, make it arrive closed condition, and open by-passing valve 59 (P2).Like this, cold-producing medium flows along the closed-loop path of the weak point of Fig. 1 dotted arrow indication.That is to say that the high-temperature high-pressure refrigerant in compressor 31 flows in outdoor heat converter 33, melt frost long-pending on the outdoor heat converter, and then return compressor 31 by bypass pipe 57.Therefore, because condensed refrigerant in the outdoor heat converter 33 is not fed in the indoor heat converter 13, so not evaporation in indoor heat converter 13 of cold-producing medium, the temperature in room can not reduce.This moment preferably in the control room with outdoor fan 21 and 39, make they shut down (P3).
During defrosting, controller 61 is by the yard piping Temperature Detector 41 Outer Tube temperature T o of sensing chamber (P4) simultaneously.So it is 10 ℃ or higher temperature (P5) that defrost operation is performed until yard piping temperature T o.If yard piping temperature T o is 10 ℃ or higher temperature, compressor 31 shut-down operations recover heating operation (S1) about 2 minutes (P6) then.
Fig. 6 is the flow chart of air-conditioner when cooling down operation shown in Figure 2.If the user has selected cooling down operation (T1), controller 61 control switching valves 55 make it be communicated with outdoor heat converter 33.In addition, controller 61 control main expansion valves 35 are to throttle, and the auxiliary expansion valve 23 of control is controlled by-passing valve 59 to closed condition (T2) simultaneously to opening.After this, if drive compression machine 31 (T3), then cold-producing medium is along the cool cycles path flow opposite with heat cycles shown in Fig. 2 dotted arrow.At this moment, cold-producing medium condensation in outdoor heat converter 33, evaporation in indoor heat converter 13, thus around first and second heat exchanger components 15 and 17, form cold air.Running by indoor fan 21 is fed to cold air in the room, thus cool room (T4).
During cooling, controller 61 receives the temperature signal of inlet pipeline Temperature Detector 43 and 25 detections of interior conduit Temperature Detector.And the temperature T s and the Ti (T5) of detection refrigerant inlet pipeline 53 and interior conduit.
Then temperature T s and Ti are compared (T6).If the temperature difference in the scope of 5 ℃ ± α, just keeps current state (T7).And then confirm selected mode of operation (Q2), carry out operation accordingly.But,, reduce the condensation rate of cold-producing medium a little if the temperature difference during greater than 5 ℃+α, just increases the aperture (T9) of main expansion valve 35.If the temperature difference, just reduces the aperture (T10) of main expansion valve 35 less than 5 ℃-α, increase the condensation rate of cold-producing medium.Carry out cooling down operation continuously according to temperature detection signal like this.
Fig. 7 is the flow chart of air-conditioner when dehumidification operation shown in Figure 2.If the user has selected dehumidification operation (U1), controller 61 is just controlled switching valve 55, and it is communicated with indoor heat converter 13.In addition, controller 61 control main expansion valves 35 are to throttle, and the auxiliary expansion valve 23 of control is controlled by-passing valve 59 to open mode (U2) simultaneously to opening.After this, if drive compression machine 31 (U3), cold-producing medium carries out cooling down operation along the cool cycles path flow shown in Fig. 2 solid arrow.
That is to say, in the high temperature and high pressure gaseous refrigerant inflow indoor heat exchanger 13 that in compressor 31, compressed, in first heat exchanger component 15, obtain condensation, become the low-temp low-pressure liquid refrigerant.At this moment, chilled condensation of refrigerant latent heat is seized by first heat exchanger component, 15 surrounding airs.Around first heat exchanger 15, form hot-air like this.The cold-producing medium of discharging from first heat exchanger component 15 obtains condensation in auxiliary expansion valve 23, it is fed in second heat exchanger component 17 then and evaporates.The airborne latent heat of vaporized refrigerant absorbing environmental makes surrounding air become cold air.At this moment, contained steam obtains saturatedly in the surrounding air around second heat exchanger 17, becomes dew, is deposited on the surface of second heat exchanger 17.Therefore, second heat exchanger, 17 ambient airs maintain moisture, and the moisture in the moisture is got rid of as the dew of phase transformation.The cold-producing medium that flows through second heat exchanger component 17 flows into compressor 31 by by-passing valve 57 backs.Then cold-producing medium is compressed, cold-producing medium is moved along the heat cycles path.
When drive compression machine 31, drive chamber's internal fan 21 (U3).The air that flows in the air intake 4 of indoor unit 1 absorbs its latent heat by second heat-exchanging part 17 that is arranged on the stream upstream, so air themperature descends.In this case, absolute humidity descends.After this in the downstream of stream, the air and first heat exchanger component 15 carry out heat exchange, so air themperature rises.At last, temperature is discharged near the air of indoor temperature.
Simultaneously, during dehumidifying, controller 61 receives the temperature signal of inlet pipeline Temperature Detector 43 and 25 detections of interior conduit Temperature Detector, and detects the temperature T s and the Ti (U5) of respective regions.Then temperature T s and Ti are compared (U6).If the temperature difference between them in the scope of 5 ℃ ± α, just keeps current state (U7).And then confirm selected mode of operation (Q2), carry out operation accordingly.If but the temperature difference then increases the aperture (U9) of auxiliary expansion valve 23 greater than 5 ℃+α, reduces the condensation rate of cold-producing medium a little.If the temperature difference, just reduces the aperture (U10) of auxiliary expansion valve 23 less than 5 ℃-α, increase the condensation rate of cold-producing medium.Carry out dehumidification operation continuously according to detected temperature signal (U5) like this.
As mentioned above, in uniting the air-conditioning and control method thereof that uses cooler and heater, during dehumidifying, air in the inflow air intake is by second heat exchanger component, 17 dryings, carry out heat exchange with first heat exchanger component 15 subsequently, thereby it is maintained and the essentially identical temperature of indoor temperature, so just it can be discharged to indoor.Therefore also just avoided cold excessively.In addition, if indoor fan 21 is to run up, then the flow velocity of air increases, and so just can accelerate the dehumidifying speed of second heat exchanger component 17, improves the condensation effect of first heat exchanger 15 simultaneously.So the air themperature that is discharged in the room can not change substantially.Therefore, because flow velocity increases, just can shorten the dehumidifying time, and can improve effect on moisture extraction.
In addition, during defrosting, the cold-producing medium that the outdoor heat converter 33 surperficial frosts of going up formation are removed does not enter indoor heat converter 13.So indoor temperature does not reduce.
Claims (21)
1. unite the air-conditioner that uses cooler and heater for one kind, comprising: a refrigerant-cycle systems that forms the closed-loop path, in this system, compressor, indoor heat converter, main expansion valve and outdoor heat converter link to each other by refrigerant tubing successively; A switching valve that is used to select heat cycles or cool cycles, during heat cycles, the cold-producing medium that compressor is discharged is supplied to indoor heat converter, during cooling, cold-producing medium is supplied to outdoor heat converter; An indoor fan and an outdoor fan, these two fans are adjacent to be respectively fixed on indoor heat converter and the outdoor heat converter; And controller that is used to control compressor, valve and fan;
Wherein indoor heat converter comprises first and second heat exchanger components and auxiliary expansion valve that is arranged between first and second heat exchanger components of serial connection; With
Controller control cold-producing medium carries out cool cycles or heat cycles, also main expansion valve is controlled at throttle simultaneously, and will assist expansion valve to be controlled at opening, finish cooling down operation and heating operation thus respectively, when the control cold-producing medium carries out heat cycles, to lead expands is controlled at opening, and will assist expands is controlled at throttle, thereby finishes dehumidification operation.
2. air-conditioner according to claim 1 wherein also comprises:
One from being arranged on the bypass pipe that tap on the refrigerant tubing between main expansion valve and the outdoor heat converter is come out and had pressure in its end; And
A by-passing valve that is arranged in the above-mentioned bypass pipe;
Wherein during dehumidifying, controller control by-passing valve is in opening.
3. air-conditioner according to claim 2, wherein:
During dehumidifying, controller control room internal fan turns round, and the control room external fan shuts down.
4. air-conditioner according to claim 1, wherein:
During heating, when reaching predetermined defrost operation condition, controller makes cold-producing medium reverse, allow cold-producing medium in cooling circuit, circulate, and control main expansion valve to closed condition, the control by-passing valve carries out defrost operation to outdoor heat converter thus to opening.
5. air-conditioner according to claim 4 further comprises:
An outdoor temperature detector that is used to detect outdoor temperature; With
A yard piping Temperature Detector that is used to detect the yard piping temperature that is arranged between main expansion valve and the outdoor heat converter;
Wherein during heating operation, when the temperature difference between outdoor temperature and the yard piping temperature reaches a certain numerical value or during greater than this value, controller is judged the defrost operation condition that reached.
6. air-conditioner according to claim 5, wherein:
When the yard piping temperature is an a certain numerical value or when being higher than this value, controller is judged and has been reached the defrost operation halt, defrost operation is stopped, and recover heating operation.
7. air-conditioner according to claim 6, wherein:
In defrost operation dwell time and heating operation there is time prepause that compressor is shut down between recovery time.
8. air-conditioner according to claim 4, wherein:
During defrosting, indoor fan and outdoor fan shut down.
9. air-conditioner according to claim 1 also comprises:
One is used to detect the interior conduit Temperature Detector that is arranged on the interior conduit temperature between the auxiliary expansion valve and second heat exchanger component; With
An input channel Temperature Detector that is used to detect the temperature of the cold-producing medium input channel that is communicated with compressor;
Wherein during dehumidifying, the auxiliary expansion valve of controller control is so that remain on the temperature difference between input channel temperature and the interior conduit temperature in the predetermined allowed band.
10. air-conditioner according to claim 9, wherein:
In the temperature difference is lower limit or during less than allowed band, controller reduces the aperture of auxiliary expansion valve, is higher limit or during greater than allowed band, controller increases the aperture of auxiliary expansion valve in the temperature difference.
11. air-conditioner according to claim 1 also comprises:
One is used to detect the interior conduit Temperature Detector that is arranged on the interior conduit temperature between the auxiliary expansion valve and second heat exchanger component; With
An input channel Temperature Detector that is used to detect the temperature of the cold-producing medium input channel that is communicated with compressor;
Wherein during cooling, controller control main expansion valve is so that remain on the temperature difference between input channel temperature and the interior conduit temperature in the predetermined allowed band.
12. air-conditioner according to claim 11 is a lower limit or during less than allowed band, controller reduces the aperture of main expansion valve in the temperature difference wherein, is higher limit or during greater than allowed band, controller increases the aperture of main expansion valve in deviation.
13. air-conditioner according to claim 1 also comprises:
A yard piping Temperature Detector that is used to detect the yard piping temperature that is arranged between main expansion valve and the outdoor heat converter; With
An input channel Temperature Detector that is used to detect the cold-producing medium input channel temperature that is communicated with compressor;
Wherein during heating operation, controller control main expansion valve is so that remain on the temperature difference between input channel temperature and the yard piping temperature in the predetermined allowed band.
14. air-conditioner according to claim 13 is a lower limit or during less than allowed band, controller reduces the aperture of main expansion valve in the temperature difference wherein, is higher limit or during greater than allowed band, controller increases the aperture of main expansion valve in deviation.
15. air-conditioner according to claim 1, wherein second exchanger part is arranged on the upstream of first heat exchanger component.
16. one kind is used to control the method for uniting the air-conditioner that uses cooler and heater, this air-conditioner comprises: a refrigerant-cycle systems that forms the closed-loop path, in this system, compressor, indoor heat converter, main expansion valve and outdoor heat converter link to each other by refrigerant tubing successively; A switching valve that is used to select heat cycles or cool cycles, during heat cycles, the cold-producing medium that compressor is discharged is supplied to indoor heat converter, during cooling, cold-producing medium is supplied to outdoor heat converter; An indoor fan and an outdoor fan, these two fans are adjacent to be respectively fixed on indoor heat converter and the outdoor heat converter; And a controller that is used to control compressor, valve and fan, the method comprising the steps of:
First and second heat exchanger components that indoor heat converter are divided into serial connection; An auxiliary expansion valve is set between first and second heat exchanger components; With
When the control cold-producing medium carries out cool cycles, main expansion valve is controlled at throttle and will assists expansion valve to be controlled at opening, carry out dehumidification operation thus.
17. the method that is used to control the air-conditioner of uniting use cooler and heater according to claim 16, this method also comprises step: during dehumidification operation, cold-producing medium is flow to the compressor from the refrigerant tubing bypass that is arranged between expansion valve and the outdoor heat converter.
18. according to claim 17ly be used to control the method for uniting the air-conditioner that uses cooler and heater, wherein during dehumidification operation, indoor fan running and outdoor fan shuts down.
19. the method that is used to control the air-conditioner of uniting use cooler and heater according to claim 16, this method also comprises step: during heating operation, when reaching predetermined defrost operation condition, make cold-producing medium reverse, allow cold-producing medium carry out cool cycles, the control main expansion valve is to closed condition, and the control by-passing valve carries out defrost operation to outdoor heat converter thus to opening.
20. the method that is used to control the air-conditioner of uniting use cooler and heater according to claim 17, this method also comprises step:
Detect outdoor temperature; Detection is arranged on the temperature of the yard piping between main expansion valve and the outdoor heat converter; With
During heating, reach a certain numerical value or during greater than this value, judge the defrost operation condition that reached when the temperature difference between outdoor temperature and the yard piping temperature.
21. the method that is used to control the air-conditioner of uniting use cooler and heater according to claim 20, this method also comprises step: when the yard piping temperature is an a certain numerical value or when being higher than this value, judge to have reached the defrost operation halt that control allows defrost operation stop and control recovers heating operation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR13566/97 | 1997-04-14 | ||
| KR13566/1997 | 1997-04-14 | ||
| KR1019970013566A KR19980076725A (en) | 1997-04-14 | 1997-04-14 | Control method of HVAC and HVAC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1199160A true CN1199160A (en) | 1998-11-18 |
| CN1148541C CN1148541C (en) | 2004-05-05 |
Family
ID=19502660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981088120A Expired - Fee Related CN1148541C (en) | 1997-04-14 | 1998-04-14 | Air conditioner for combined use of cooler and heater and controlling method therefor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2919829B2 (en) |
| KR (1) | KR19980076725A (en) |
| CN (1) | CN1148541C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149168B (en) * | 2006-09-21 | 2010-05-26 | 海尔集团公司 | Temperature-fixing dehumidifying air conditioner control method |
| CN103090463A (en) * | 2011-10-31 | 2013-05-08 | 杭州三花研究院有限公司 | Air-conditioning system for electric cars |
| CN103868297A (en) * | 2014-04-01 | 2014-06-18 | 深圳麦克维尔空调有限公司 | Heat pump type unit |
| CN109373537A (en) * | 2018-11-01 | 2019-02-22 | 奥克斯空调股份有限公司 | The anti-cold air control method, apparatus of air-conditioning and air conditioner |
| CN109751234A (en) * | 2019-01-14 | 2019-05-14 | 四川虹美智能科技有限公司 | A kind of freezer compressor test device |
| CN110173939A (en) * | 2019-05-17 | 2019-08-27 | 青岛海尔空调电子有限公司 | Defrosting control method for air conditioner |
| CN112440674A (en) * | 2019-09-03 | 2021-03-05 | 东普雷股份有限公司 | Refrigeration device and method for operating refrigeration device |
| CN113551305A (en) * | 2020-04-26 | 2021-10-26 | 海信（山东）空调有限公司 | Air conditioner with double heat exchangers and control method thereof |
| CN113864926A (en) * | 2021-10-19 | 2021-12-31 | 广东积微科技有限公司 | Air conditioner and dehumidification method |
| CN113864925A (en) * | 2021-10-19 | 2021-12-31 | 广东积微科技有限公司 | Air conditioner |
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|---|---|---|---|---|
| KR100504479B1 (en) * | 2002-11-09 | 2005-08-01 | 엘지전자 주식회사 | Indoor unit for air conditioner |
| KR101176498B1 (en) * | 2004-05-11 | 2012-08-22 | 엘지전자 주식회사 | Air Conditioner |
| KR100656083B1 (en) | 2005-01-31 | 2006-12-11 | 엘지전자 주식회사 | Heat exchanger in an air harmonizing system |
| KR101027165B1 (en) | 2009-07-06 | 2011-04-05 | (주)유천써모텍 | Air-conditioner with a multi-blow control function |
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| CN102997517B (en) * | 2011-09-09 | 2015-08-12 | 珠海格力电器股份有限公司 | Constant-temperature dehumidification system of air conditioner |
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| KR101483628B1 (en) | 2014-09-03 | 2015-01-16 | 주식회사 신성엔지니어링 | Absorptive dehumidifier and control method thereof |
-
1997
- 1997-04-14 KR KR1019970013566A patent/KR19980076725A/en not_active Application Discontinuation
-
1998
- 1998-04-14 JP JP10103060A patent/JP2919829B2/en not_active Expired - Fee Related
- 1998-04-14 CN CNB981088120A patent/CN1148541C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149168B (en) * | 2006-09-21 | 2010-05-26 | 海尔集团公司 | Temperature-fixing dehumidifying air conditioner control method |
| CN103090463A (en) * | 2011-10-31 | 2013-05-08 | 杭州三花研究院有限公司 | Air-conditioning system for electric cars |
| CN103868297A (en) * | 2014-04-01 | 2014-06-18 | 深圳麦克维尔空调有限公司 | Heat pump type unit |
| CN103868297B (en) * | 2014-04-01 | 2016-06-08 | 深圳麦克维尔空调有限公司 | A kind of pump type heat unit |
| CN109373537A (en) * | 2018-11-01 | 2019-02-22 | 奥克斯空调股份有限公司 | The anti-cold air control method, apparatus of air-conditioning and air conditioner |
| CN109751234B (en) * | 2019-01-14 | 2020-04-10 | 四川虹美智能科技有限公司 | Refrigerator compressor testing arrangement |
| CN109751234A (en) * | 2019-01-14 | 2019-05-14 | 四川虹美智能科技有限公司 | A kind of freezer compressor test device |
| CN110173939A (en) * | 2019-05-17 | 2019-08-27 | 青岛海尔空调电子有限公司 | Defrosting control method for air conditioner |
| CN112440674A (en) * | 2019-09-03 | 2021-03-05 | 东普雷股份有限公司 | Refrigeration device and method for operating refrigeration device |
| CN112440674B (en) * | 2019-09-03 | 2023-10-31 | 东普雷股份有限公司 | Refrigerating device and method for operating refrigerating device |
| CN113551305A (en) * | 2020-04-26 | 2021-10-26 | 海信（山东）空调有限公司 | Air conditioner with double heat exchangers and control method thereof |
| CN113864926A (en) * | 2021-10-19 | 2021-12-31 | 广东积微科技有限公司 | Air conditioner and dehumidification method |
| CN113864925A (en) * | 2021-10-19 | 2021-12-31 | 广东积微科技有限公司 | Air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980076725A (en) | 1998-11-16 |
| CN1148541C (en) | 2004-05-05 |
| JPH10311586A (en) | 1998-11-24 |
| JP2919829B2 (en) | 1999-07-19 |
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