CN104251548A - Heat exchange system of single air conditioner as well as single air conditioner and control method thereof - Google Patents
Heat exchange system of single air conditioner as well as single air conditioner and control method thereof Download PDFInfo
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Abstract
The invention discloses a heat exchange system of a single air conditioner as well as the single air conditioner and a control method thereof. The heat exchange system comprises an indoor heat exchanger, an outdoor heat exchanger and a compressor, wherein the indoor heat exchanger is divided into at least two secondary indoor heat exchangers; the outdoor heat exchanger is divided into secondary outdoor heat exchangers with the quantity which is the same as that of the secondary indoor heat exchangers; the heat exchange system is further provided with throttling devices and four-way reversing valves with the quantities which are the same as the quantity of the secondary indoor heat exchangers; a heat exchange module is composed of one secondary indoor heat exchanger, one secondary outdoor heat exchanger, one throttling device and one four-way reversing valve; all the heat exchange modules are connected with the compressor at the same time. According to the heat exchange system of the single air conditioner disclosed by the invention, the heat exchange system is divided into the plurality of heat exchange modules so that the independent control on the heat exchange modules is realized and the refrigeration of one part of the heat exchange modules and the heating of the residual heat exchange modules are realized, and furthermore, functions of dehumidifying at a constant temperature, defrosting continuously by heating, outputting refrigeration or heating at a constant temperature and the like are realized.
Description
Technical field
The present invention relates to air-conditioner technical field, particularly relate to a kind of unit air-conditioner heat-exchange system, there is the unit air-conditioner of this heat-exchange system and the control method of unit air-conditioner.
Background technology
Current unit air-conditioner, as shown in Figure 1, is made up of assemblies such as compressor 20, indoor heat exchanger 21, outdoor heat exchanger 22, four-way change-over valve 23, throttling arrangements 24.Wherein, the Single port of indoor heat exchanger 21 is connected with throttling arrangement 22, and then is connected through the Single port of throttling arrangement 22 with outdoor heat exchanger 22, and the another port of indoor heat exchanger 21 is connected with the 3rd valve port E of four-way change-over valve 23; The another port of outdoor heat exchanger 22 is connected with the first valve port C of four-way change-over valve 23.And the second valve port D of four-way change-over valve 23 and the 4th valve port S are respectively with the exhaust outlet of compressor 20 with gas returning port is corresponding is connected.Connected by pipeline between each assembly, form the heat exchange module of a closed-loop path formula, the flow direction of cold-producing medium can be changed by the commutation of four-way change-over valve 23, thus realize refrigeration or heat.Because air-conditioner only has a heat exchange module, so, at one time, under indoor heat exchanger 21 and outdoor heat exchanger 22 all can only be in a kind of mode of operation.
Due to current unit air-conditioner at one time in can only be in a kind of mode of operation under, so when realizing the function such as dehumidifying, defrosting, the constant temperature output of indoor set can not be realized simultaneously.Such as, when room temperature is suitable for but humidity is larger, user only wishes the humidity of indoor to reduce, and does not wish to reduce temperature.Dehumidifying due to air-conditioner be by under refrigeration mode, indoor water steam meet condensation knot, thus arrive dehumidifying object.Thus, under dehumidification mode, air outlet of indoor set blowout cool breeze, makes indoor temperature reduce, allows user feel under the weather, even cause flu.And for example, when winter, air-conditioner was in heating mode, the easy frosting of outdoor unit heat exchanger, affects the heat transfer effect of heat exchanger.What the defrosting of current air-conditioner generally adopted is the blower fan stopping indoor set and off-premises station, and air-conditioner is converted into refrigeration mode, and outdoor unit heat exchanger is dispelled the heat defrosting, and now air outlet of indoor set does not have warm braw to blow out, and air-conditioner can not play the effect of intensification.In addition, current air-conditioner reaches design temperature fast in order to make indoor temperature, at the initial period that air-conditioner runs, the temperature of air outlet is generally far above (heating mode) or lower than (refrigeration mode) design temperature, the wind of such air outlet feels under the weather with it to user, when particularly there are old man and a child in indoor.So wish that the leaving air temp of air outlet is design temperature, namely air-conditioner can export by constant temperature (design temperature).
In order to realize the constant temperature dehumidification of air-conditioner, publication number be 101149169 Chinese invention patent disclose a kind of healthy dehumidification type air conditioner, indoor heat exchanger is divided into bringing-up section and dehumidifying section, by to refrigeration system reasonable diffluence, realize the function being realized the indoor set heat exchanger bringing-up section section of heating and dehumidify refrigeration by a set of circulatory system, realize the constant-temperature dehumidifying function of air-conditioner.But because refrigeration system distribution pipeline is complicated, increase production cost.In addition, although technical scheme can solve the problem of constant temperature dehumidification disclosed in this patent, when under heating mode, occur that the situations such as off-premises station frosting occur, just can not ensure the blowout of the comfortable air quantity of indoor set.
Summary of the invention
The present invention is directed to the above-mentioned problems in the prior art, a kind of unit air-conditioner heat-exchange system is proposed, by heat-exchange system being divided at least two independently heat exchange modules, convenient each heat exchange module to be controlled separately, part heat exchange module refrigeration can be realized, part heat exchange module heats.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of unit air-conditioner heat-exchange system, comprise an indoor heat exchanger, an outdoor heat exchanger and a compressor, described indoor heat exchanger is divided at least two indoor to divide heat exchanger, described outdoor heat exchanger is divided into the outdoor equal with indoor heat exchanger quantity to divide heat exchanger, described heat-exchange system is also provided with and divides with described indoor the throttling arrangement and four-way change-over valve that heat exchanger quantity is equal, and heat exchanger is divided in described indoor, a described outdoor divides heat exchanger and a described throttling arrangement and a described four-way change-over valve to form a heat exchange module; In each described heat exchange module, described indoor divide the Single port of heat exchanger to be connected with described throttling arrangement, and another port is connected with the 3rd valve port of described four-way change-over valve; Described outdoor divides heat exchanger Single port to be connected with described throttling arrangement, and another port is connected with the first valve port of described four-way change-over valve; Second valve port of described four-way change-over valve and the 4th valve port are respectively with the exhaust outlet of described compressor with gas returning port is corresponding is connected.
Divide the room air of heat exchanger to mix rear output to make to flow through multiple indoor, described indoor divide heat exchanger to arrange in tandem along from the blower fan of unit air conditioner room unit to the air supply direction of air outlet of indoor set.
Further, between the exhaust outlet and described heat exchange module of described compressor, be provided with part flow arrangement, between the gas returning port and described heat exchange module of described compressor, be provided with collector-shoe gear.
Further, described part flow arrangement and described collector-shoe gear are knockout.
Preferably, described indoor heat exchanger is divided into two indoor to divide heat exchanger.
The present invention also provides a kind of unit air-conditioner, comprises indoor set and off-premises station, and described air-conditioner has above-mentioned heat-exchange system.
The present invention also provides a kind of control method of unit air-conditioner, described air-conditioner comprises indoor set and off-premises station, described air-conditioner has above-mentioned heat-exchange system, be in refrigeration mode by control section heat exchange module, department's heat exchange module is in heating mode, realize constant temperature dehumidification, heat the functions such as uninterrupted defrosting, refrigerated constant temperature output, thermostatic heating output.
For achieving the above object, control method of the present invention adopts following technical proposals to realize:
A control method for unit air-conditioner, described air-conditioner comprises indoor set and off-premises station, and air-conditioner has above-mentioned heat-exchange system, and described air outlet of indoor set place is provided with air outlet temperature sensor, and described control method comprises the steps:
A, to control in multiple described heat exchange module that part runs on refrigeration mode, part runs on heating mode;
B, the leaving air temp T1 of air outlet temperature sensor feedback to be compared with reference temperature T0, as T1<T0, the throttling arrangement aperture in the described heat exchanger module under heating mode is tuned up; As T1>T0, the throttling arrangement aperture in the described heat exchanger module under refrigeration mode is tuned up.
Exporting to realize constant temperature, in described step B, as T1<T0, the throttling arrangement aperture in the described heat exchanger module under heating mode being tuned up, until T1=T0; As T1>T0, the throttling arrangement aperture in the described heat exchanger module under refrigeration mode is tuned up, until T1=T0.
Wherein, described reference temperature T0 is design temperature.
Or described reference temperature T0 is the indoor temperature detected in real time.
Further, when air-conditioner operation heats uninterrupted defrosting mode, before described steps A, also there is steps A 0: in a heating mode, judging whether outdoor heat exchanger reaches defrosting condition, performing described steps A and B when reaching defrosting condition.
Further, when air-conditioner runs thermostatic heating output mode, after described step B, also there is step C1: judge whether the time that constant temperature exports reaches setting-up time, and transfer the heat exchange module run under refrigeration mode to operation heating mode when reaching setting-up time.
Further, when air-conditioner running refrigerating constant temperature output mode, after described step B, also there is step C2: judge whether the time that constant temperature exports reaches setting-up time, and transfer the heat exchange module run under heating mode to running refrigerating pattern when reaching setting-up time.
Compared with prior art, advantage of the present invention and good effect are: unit air-conditioner heat-exchange system proposed by the invention, by heat-exchange system is divided into two or more heat exchange module, conveniently controls separately each heat exchange module; And by controlling separately each heat exchange module, part heat exchange module refrigeration can be realized, part heat exchange module heats, and then can realize unit air-conditioner constant temperature dehumidification, heat the functions such as uninterrupted defrosting, refrigerated constant temperature output, thermostatic heating output.
After reading the specific embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the structural representation of unit air-conditioner heat-exchange system in prior art;
Fig. 2 is the principle schematic of a kind of embodiment of unit air-conditioner heat-exchange system proposed by the invention;
Fig. 3 is the schematic diagram that two heat exchange modules of unit air-conditioner heat-exchange system in Fig. 2 heat simultaneously;
Fig. 4 is the schematic diagram that two heat exchange modules of unit air-conditioner heat-exchange system in Fig. 2 freeze simultaneously;
Fig. 5 is the structural representation of a kind of embodiment of unit air-conditioner heat-exchange system proposed by the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Consulting Fig. 2, is the principle schematic of a kind of embodiment of unit air-conditioner heat-exchange system proposed by the invention shown in this figure.
Consult shown in Fig. 2, the unit air-conditioner heat-exchange system of this embodiment, there are an indoor heat exchanger 1, outdoor heat exchanger 4, compressor 11, two throttling arrangements 12 and 13, two four-way change-over valves 8 and 9.Wherein, indoor heat exchanger 1 is divided into two parts, is respectively indoor point heat exchanger 2 and indoor point heat exchanger 3.Accordingly, outdoor heat exchanger 4 is also divided into outdoor point heat exchanger 5 and outdoor point heat exchanger 6 two parts.And indoor point heat exchanger 2, outdoor point heat exchanger 5, throttling arrangement 12 and a four-way change-over valve 9 form heat exchange module 14, and indoor point heat exchanger 3, outdoor heat exchanger 6, throttling arrangement 13 and the four-way change-over valve 8 of dividing form heat exchange module 15.
Wherein, in heat exchange module 14, the Single port of indoor point heat exchanger 2 is connected with throttling arrangement 12, and then is connected through the Single port of throttling arrangement 12 with outdoor point heat exchanger 5; First valve port C of four-way change-over valve 9 is connected with the other end of outdoor point heat exchanger 5, second valve port D of four-way change-over valve 9 is connected with the exhaust outlet of compressor 11,3rd valve port E of four-way change-over valve 9 is connected with the another port of indoor point heat exchanger 2, and the 4th valve port S of four-way change-over valve 9 is connected with the gas returning port of compressor 11.
In heat exchange module 15, the Single port of indoor point heat exchanger 3 is connected with throttling arrangement 13, and then is connected through the Single port of throttling arrangement 13 with outdoor point heat exchanger 6; First valve port C of four-way change-over valve 8 is connected with the other end of outdoor point heat exchanger 6, second valve port D of four-way change-over valve 8 is connected with the exhaust outlet of compressor 11,3rd valve port E of four-way change-over valve 8 is connected with the another port of indoor point heat exchanger 3, and the 4th valve port S of four-way change-over valve 8 is connected with the gas returning port of compressor 11.
By indoor heat exchanger 1 and outdoor heat exchanger 4 are all divided into two parts, heat exchange module 14 and heat exchange module 15 two heat exchange modules can be formed.For heat exchange module 14, heat exchange module 14 is connected with compressor 11, forms a closed-loop path, can realize this heat exchange module 14 be operated in refrigeration mode or heating mode by the commutation of four-way change-over valve 9.And, temperature can be realized by the control of throttling arrangement 12 pairs of refrigerant flows and control, so heat exchange module 14 can realize independent control, and have three states to select, namely close, freeze or heat.In like manner, heat exchange module 15 also can realize independent control, also can select to close, freeze or heat any one in three states.
Because the exhaust outlet of compressor 11 is connected with the second valve port D of four-way change-over valve 8 and the second valve port of four-way change-over valve 9 simultaneously, and the exhaust outlet of compressor 11 only has one, so arrange part flow arrangement 7 in the exhaust ports of compressor 11, the second valve port D of four-way change-over valve 8 and the second valve port D of four-way change-over valve 9 is connected on part flow arrangement 7.Part flow arrangement 7 can adopt knockout to realize, and is preferably triple valve.In like manner, the gas returning port place of compressor 11 is provided with collector-shoe gear 10, the 4th valve port S of four-way change-over valve 8 and the 4th valve port S of four-way change-over valve 9 is connected on collector-shoe gear 10.Collector-shoe gear 10 also can adopt knockout to realize, and is preferably triple valve.
Certainly, in other embodiments, heat exchanger is divided in the indoor that indoor heat exchanger 1 also can be divided into more than three or three, outdoor heat exchanger 2 is also divided into the outdoor dividing heat exchanger quantity equal three or more than three with indoor to divide heat exchanger, the so unit air conditioner heat exchange system heat exchange module that will be divided into more than three or three, each heat exchange module all can control separately, and each heat exchange module has three kinds of states to select: close, freeze, heat, thus multiple combination state can be obtained according to the demand of user and realize various different function.
The heat-exchange system of above-described embodiment can be applied in unit air-conditioner, and, being in different duties by controlling two heat exchange modules, constant temperature dehumidification can being realized, heat uninterrupted defrosting, refrigerated constant temperature output, the function such as thermostatic heating output.
Certainly, in other embodiments, when a heat exchange module just can meet the current demand of user, other heat exchange modules can be closed, like this can not only economize energy, service life of air-conditioner can also be improved.
Still consult Fig. 2, the direction of arrow in this Fig. 2 represents the flow direction of cold-producing medium.The first embodiment of unit air-conditioner control method proposed by the invention is described, to realize constant-temperature dehumidifying function below in conjunction with Fig. 2 and Fig. 5.
In this embodiment, at uptake of indoor machine of air conditioner, place is provided with temperature sensor, and the rate-determining steps realizing constant temperature dehumidification comprises:
A, setting heat exchange module 14 are heating mode, and heat exchange module 15 is refrigeration mode, and the flow direction of cold-producing medium in heat-exchange system as shown by the arrows in Figure 2.
Specifically, from the gaseous refrigerant of the HTHP that compressor 11 exhaust outlet is discharged, by part flow arrangement 7, a part enters in heat exchange module 14, and another part enters in heat exchange module 15.
II, in heat exchange module 14, from the gaseous refrigerant of the HTHP that compressor 11 exhaust outlet is discharged, enters indoor point heat exchanger 2 by four-way change-over valve 9, becomes the liquid of HTHP with room air heat exchange after condensing; Flow through throttling arrangement 12 afterwards and enter outdoor point heat exchanger 5, after cold-producing medium evaporation endothermic, become the gas of low-temp low-pressure; Finally, flow of refrigerant is back to compressor 11 through four-way change-over valve 9, collector-shoe gear 10, completes a closed circuit.The indoor air temperature flowing through indoor point heat exchanger 2 in this process raises, and humidity remains unchanged substantially.
III, in heat exchange module 15, from the gaseous refrigerant of the HTHP that compressor 11 exhaust outlet is discharged, enters outdoor point heat exchanger 6 by four-way change-over valve 8, and cold-producing medium becomes the liquid of HTHP after meeting condensation knot; Flow through throttling arrangement 13 afterwards and enter indoor point heat exchanger 3, after cold-producing medium evaporation endothermic, become the gas of low-temp low-pressure; Finally, flow of refrigerant is back to compressor 11 through four-way change-over valve 8, collector-shoe gear 10, completes a closed circuit.In this process, indoor point heat exchanger 3 evaporates the heat absorbing the room air flowed through, and divide cold-producing medium in heat exchanger 3 to be in saturated evaporating state due to now indoor, the indoor dew-point temperature of surface temperature lower than room air of dividing heat exchanger 3, so the steam in room air will be separated out in liquid form.Now, the indoor air temperature flowing through indoor point heat exchanger 3 reduces, and humidity also reduces.Dehumidification function in the present embodiment is realized by heat exchange module 15.
IV is in order to reach good effect on moisture extraction, the setting of indoor heat exchanger 1 in the present embodiment, as shown in Figure 5, has blower fan 17 in unit air conditioner room unit, on the air supply direction of blower fan 17 to indoor air outlet, before indoor point of heat exchanger 3 is set, indoor point heat exchanger 2 is set below.The room air of the humidity that fan 17 is carried is first through indoor point heat exchanger 3 dehumidifying and cooling, and Cryogenic air dry afterwards flows through after indoor point heat exchanger 2 heats up again and blows to indoor by air outlet of indoor set.The leaving air temp of such air-conditioner is just more suitable.
B, the leaving air temp T1 of air outlet temperature sensor feedback to be compared with as with reference to the design temperature T0 of temperature.
As T1<T0, throttling arrangement 12 aperture in heat exchanger module 14 is tuned up, the indoor air temperature now flowing through indoor point heat exchanger 2 raises, after the room air flowing through indoor point heat exchanger 2 and the room air flowing through indoor point heat exchanger 3 mix, air outlet of indoor set temperature T1 raises, continue to regulate, finally make T1=T0.
As T1>T0, throttling arrangement 13 aperture in heat exchanger module 15 is tuned up, the indoor air temperature now flowing through indoor point heat exchanger 3 reduces, after the room air flowing through indoor point heat exchanger 2 and the room air flowing through indoor point heat exchanger 3 mix, air outlet of indoor set temperature T1 reduces, continue to regulate, finally make T1=T0.
In stepb, by real-time adjustment, ensure that air outlet temperature is that constant temperature exports.
The present embodiment, ensure that the output of the comfortable wind-warm syndrome of air outlet, improves the comfort level of user in dehumidification process while dehumidifying.
Still consult Fig. 2 and Fig. 5, the second embodiment of unit air-conditioner control method proposed by the invention is described, realizes constant temperature dehumidification, be with the difference of the first embodiment, reference temperature is defined as room temperature.
Indoor set shell is also provided with ambient temperature sensor, and extracting the temperature of indoor temperature transmitter when constant temperature dehumidification pattern starts is T0, or the temperature extracting room temperature temperature sensor Real-Time Monitoring is T0, and other steps are identical with the first embodiment.
Consult Fig. 3, the third embodiment of unit air-conditioner control method proposed by the invention is described, to realize heating uninterrupted defrosting.Figure 3 shows that identical from unit air-conditioner heat-exchange system structure in Fig. 2 but that refrigerant flow direction is a different schematic diagram.And, for realizing heating uninterrupted defrosting, in the present embodiment, divide outside air conditioner chamber on heat exchanger 5 and outdoor point heat exchanger 6 and outdoor point heat exchange temperature sensor is set respectively, preferably divided outdoor heat exchange temperature sensor setting to divide the bottom of heat exchanger in each outdoor.
The step realizing heating uninterrupted defrosting comprises:
A0, in a heating mode, shown in Figure 3, heat exchange module 14 and heat exchange module 15 are all heating mode, judge that each outdoor divides the temperature of heat exchange temperature sensor feedback whether to reach defrosting condition respectively, perform steps A and B when reaching defrosting condition.The temperature that defrosting condition can set outdoor heat exchanger defrosts when reaching subzero 9 DEG C to subzero 16 DEG C, set defrosting condition in the present embodiment as when an outdoor point heat exchange temperature is less than or equal to subzero 9 DEG C, unit air-conditioner enters and heats uninterrupted defrosting mode.In the present embodiment, such as detect that the temperature of outdoor point heat exchange 6 is subzero 9 DEG C, then heat exchange module 15 reaches defrosting condition.
A, transfer heat exchange module 15 to refrigeration mode, heat exchange module 14 or be heating mode, shown in Figure 2, the flow direction of cold-producing medium in heat-exchange system as shown by the arrows in Figure 2.
Specifically, from the gaseous refrigerant of the HTHP that compressor 11 exhaust outlet is discharged, by part flow arrangement 7, a cold-producing medium part enters in heat exchange module 14 I, and another part enters in heat exchange module 15.
II, in heat exchange module 14, from the gaseous refrigerant of the HTHP that compressor 11 exhaust outlet is discharged, enters indoor point heat exchanger 2, with the liquid becoming HTHP after room air heat exchange condensation heat by four-way change-over valve 9; Flow through throttling arrangement 12 afterwards and enter outdoor point heat exchanger 5, after cold-producing medium evaporation endothermic, become the gas of low-temp low-pressure; Last flow of refrigerant is back to compressor 11 through four-way change-over valve 9, collector-shoe gear 10, completes a closed circuit.The indoor air temperature flowing through indoor point heat exchanger 2 in this process raises.
III, in heat exchange module 15, from the gaseous refrigerant of the HTHP that compressor 11 exhaust outlet is discharged, enters outdoor point heat exchanger 6 by four-way change-over valve 8, and the liquid becoming HTHP after after condensation knot met by cold-producing medium; Flow through throttling arrangement 13 afterwards and enter indoor point heat exchanger 3, after cold-producing medium evaporation endothermic, become the gas of low-temp low-pressure; Last flow of refrigerant is back to compressor 11 through four-way change-over valve 8, collector-shoe gear 10, completes a closed circuit.In this process, cold-producing medium divides heat exchanger 6 place's heat release in outdoor, makes the frost melts outside outdoor point heat exchanger 6.Now, the indoor air temperature flowing through indoor point heat exchanger 3 reduces.Defrost function in the present embodiment is realized by heat exchange module 15.
IV is in order to reach good defrosting effect, and in the present embodiment, the layout of outdoor heat exchanger 2, as shown in Figure 5, has blower fan 18 in unit air-conditioner outdoor unit, arranges outdoor point heat exchanger 6 at off-premises station internal upper part, and bottom arranges outdoor point heat exchanger 5.The layout of indoor heat exchanger 1, as described in Figure 5, has blower fan 17 in unit air conditioner room unit, on the air supply direction of blower fan 17 to indoor air outlet, before indoor point of heat exchanger 3 is set, indoor point heat exchanger 2 is set below.First the room air that fan 17 is carried reduces through indoor point heat exchanger 3 temperature, and Cryogenic air flows through after indoor point heat exchanger 2 heats up again and blows to indoor by air outlet of indoor set afterwards.The leaving air temp of such air-conditioner is just more suitable.
B, the leaving air temp T1 of air outlet temperature sensor feedback to be compared with as with reference to the design temperature T0 of temperature.
As T1<T0, throttling arrangement 12 aperture in heat exchanger module 14 is tuned up, the indoor air temperature now flowing through indoor point heat exchanger 2 raises, after the room air flowing through indoor point heat exchanger 2 and the room air flowing through indoor point heat exchanger 3 mix, air outlet of indoor set temperature T1 raises.
As T1>T0, throttling arrangement 13 aperture in heat exchanger module 15 is tuned up, the indoor air temperature now flowing through indoor point heat exchanger 3 reduces, after the room air flowing through indoor point heat exchanger 2 and the room air flowing through indoor point heat exchanger 3 mix, air outlet of indoor set temperature T1 reduces.
In the present embodiment, in defrost process, ensure that the blowout of air-conditioner air outlet warm braw, improve the comfort level of user.
In other embodiments, only an outdoor temperature sensor can being set in the bottom of outdoor heat exchanger, also can ensureing that constant temperature exports by regulating the aperture of choke valve.
Still consult Fig. 2, the 4th kind of embodiment of the control method of unit air-conditioner proposed by the invention is described, export to realize thermostatic heating.
In this embodiment, at uptake of indoor machine of air conditioner, place is provided with temperature sensor, and the step realizing thermostatic heating output comprises:
A, setting heat exchange module 14 are heating mode, and heat exchange module 15 is refrigeration mode, shown in Figure 2, and as shown by the arrows in Figure 2, the running status change of cold-producing medium in heat exchange module as mentioned above for the flow direction of cold-producing medium in heat-exchange system.
B, the leaving air temp T1 of air outlet temperature sensor feedback to be compared with design temperature T0.
As T1<T0, throttling arrangement 12 aperture in heat exchanger module 14 is tuned up, the indoor air temperature now flowing through indoor point heat exchanger 2 raises, after the room air flowing through indoor point heat exchanger 2 and the room air flowing through indoor point heat exchanger 3 mix, air outlet of indoor set temperature T1 raises, and finally makes T1=T0.
As T1>T0, throttling arrangement 13 aperture in heat exchanger module 15 is tuned up, the indoor air temperature now flowing through indoor point heat exchanger 3 reduces, after the room air flowing through indoor point heat exchanger 2 and the room air flowing through indoor point heat exchanger 3 mix, air outlet of indoor set temperature T1 reduces, and finally makes T1=T0.
By real-time adjustment, ensure that air outlet temperature is that constant temperature exports.
Step C1, judge that time that constant temperature exports reaches setting-up time after, heat exchange module 15 transfers refrigeration mode to, shown in Figure 3, and heat exchange module 14 and 15 is all in heating mode.Setting-up time can be selected to be 5-15 minute; Choosing setting-up time in the present embodiment is 10 minutes, and after constant temperature exports 10 minutes, heat exchange module 15 transfers refrigeration mode to.
In the present embodiment, avoid air outlet temperature in heating operations in winter more too high than design temperature, and user is felt under the weather, ensure that constant temperature exports, improve the comfort level of user.
Still consult Fig. 2, control method the 5th kind of embodiment of unit air-conditioner proposed by the invention is described, export to realize refrigerated constant temperature, steps A, B adopt and the 4th kind of step that embodiment is identical, also comprise step C2.
C2, judge that time that constant temperature exports reaches setting-up time after, heat exchange module 14 transfers refrigeration mode to, shown in Figure 4, and heat exchange module 14 and 15 is all in refrigeration mode.Setting-up time can be selected to be 5-15 minute; Choosing setting-up time in the present embodiment is 10 minutes, and after constant temperature exports 10 minutes, heat exchange module 14 transfers refrigeration mode to.
In the present embodiment, avoid air outlet temperature in cooling in summer process more too low than design temperature, and user is felt under the weather, ensure that constant temperature exports, improve the comfort level of user.
Above embodiment only in order to technical scheme of the present invention to be described, but not is limited; Although with reference to previous embodiment to invention has been detailed description, for the person of ordinary skill of the art, still can modify to the technical scheme described in previous embodiment, or equivalent replacement is carried out to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention's technical scheme required for protection.
Claims (10)
1. a unit air-conditioner heat-exchange system, comprise an indoor heat exchanger, an outdoor heat exchanger and a compressor, it is characterized in that, described indoor heat exchanger is divided at least two indoor to divide heat exchanger, described outdoor heat exchanger is divided into the outdoor equal with indoor heat exchanger quantity to divide heat exchanger, described heat-exchange system is also provided with and divides with described indoor the throttling arrangement and four-way change-over valve that heat exchanger quantity is equal, heat exchanger is divided in described indoor, a described outdoor divides heat exchanger and a described throttling arrangement and a described four-way change-over valve to form a heat exchange module, in each described heat exchange module, described indoor divide the Single port of heat exchanger to be connected with described throttling arrangement, and another port is connected with the 3rd valve port of described four-way change-over valve, described outdoor divides the Single port of heat exchanger to be connected with described throttling arrangement, and another port is connected with the first valve port of described four-way change-over valve, second valve port of described four-way change-over valve and the 4th valve port are respectively with the exhaust outlet of described compressor with gas returning port is corresponding is connected.
2. heat-exchange system according to claim 1, is characterized in that, described indoor divide heat exchanger to arrange in tandem along from the blower fan of unit air conditioner room unit to the air supply direction of air outlet of indoor set.
3. heat-exchange system according to claim 1, is characterized in that, between the exhaust outlet and described heat exchange module of described compressor, be provided with part flow arrangement, between the gas returning port and described heat exchange module of described compressor, be provided with collector-shoe gear.
4. the heat-exchange system according to claim 1 or 2 or 3, is characterized in that, described indoor heat exchanger is divided into two indoor to divide heat exchanger.
5. a unit air-conditioner, comprises indoor set and off-premises station, it is characterized in that, described air-conditioner has the heat-exchange system according to any one of the claims 1 to 4.
6. the control method of a unit air-conditioner, it is characterized in that, described air-conditioner comprises indoor set and off-premises station, described air-conditioner has the heat-exchange system according to any one of the claims 1 to 4, and described air outlet of indoor set place is provided with air outlet temperature sensor, described control method comprises the steps:
A, to control in multiple described heat exchange module that part runs on refrigeration mode, part runs on heating mode;
B, the leaving air temp T1 of described air outlet temperature sensor feedback to be compared with reference temperature T0, as T1<T0, the throttling arrangement aperture in the described heat exchanger module under heating mode is tuned up; As T1>T0, the throttling arrangement aperture in the described heat exchanger module under refrigeration mode is tuned up.
7. control method according to claim 6, is characterized in that, in described step B, as T1<T0, tunes up, the throttling arrangement aperture in the described heat exchanger module under heating mode until T1=T0; As T1>T0, the throttling arrangement aperture in the described heat exchanger module under refrigeration mode is tuned up, until T1=T0.
8. control method according to claim 6, is characterized in that, described reference temperature T0 is design temperature or the indoor temperature for detecting in real time.
9. the control method according to any one of claim 6 to 8, it is characterized in that, when air-conditioner operation heats uninterrupted defrosting mode, before described steps A, also there is steps A 0: in a heating mode, judging whether outdoor heat exchanger reaches defrosting condition, performing described steps A and B when reaching defrosting condition.
10. the control method according to claim 6 or 8, it is characterized in that, air-conditioner run heat/refrigerated constant temperature output mode time, after described step B, also there is step C: judge whether the time that constant temperature exports reaches setting-up time, and all transfer all heat exchange modules to operation when reaching setting-up time and heat/refrigeration mode.
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| CN201310263952.8A CN104251548B (en) | 2013-06-28 | 2013-06-28 | Unit air conditioner heat-exchange system, unit air conditioner and its control method |
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Cited By (12)
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| CN104990230A (en) * | 2015-07-28 | 2015-10-21 | 广东美的暖通设备有限公司 | Air-conditioning system and control method thereof |
| CN106225131A (en) * | 2016-07-29 | 2016-12-14 | 广东美的制冷设备有限公司 | Heating and air conditioner and control method |
| CN106322604A (en) * | 2016-07-29 | 2017-01-11 | 广东美的制冷设备有限公司 | Single cooling type air conditioner and control method |
| CN106403342A (en) * | 2016-07-29 | 2017-02-15 | 广东美的制冷设备有限公司 | Single cooling type air conditioner and control method |
| CN107869855A (en) * | 2016-09-26 | 2018-04-03 | 广东美芝制冷设备有限公司 | Heating and air conditioner and single cold type air conditioner |
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| CN111425948A (en) * | 2020-04-03 | 2020-07-17 | 宁波奥克斯电气股份有限公司 | Dehumidification control method and device and air conditioner |
| CN111765606A (en) * | 2020-06-10 | 2020-10-13 | 海信（山东）空调有限公司 | Method for controlling low-temperature heating start of air conditioner, air conditioner and storage medium |
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| CN104990230B (en) * | 2015-07-28 | 2018-04-06 | 广东美的暖通设备有限公司 | Air-conditioning system and its control method |
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| CN106403342A (en) * | 2016-07-29 | 2017-02-15 | 广东美的制冷设备有限公司 | Single cooling type air conditioner and control method |
| CN107869855A (en) * | 2016-09-26 | 2018-04-03 | 广东美芝制冷设备有限公司 | Heating and air conditioner and single cold type air conditioner |
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| CN112443903A (en) * | 2019-08-30 | 2021-03-05 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system |
| CN112443903B (en) * | 2019-08-30 | 2022-06-24 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system |
| WO2021047158A1 (en) * | 2019-09-11 | 2021-03-18 | 广东美的制冷设备有限公司 | Air conditioner and control method therefor |
| CN110671744A (en) * | 2019-11-08 | 2020-01-10 | 宁波奥克斯电气股份有限公司 | Air conditioner and constant-temperature dehumidification control method thereof |
| CN111425948A (en) * | 2020-04-03 | 2020-07-17 | 宁波奥克斯电气股份有限公司 | Dehumidification control method and device and air conditioner |
| CN111765606A (en) * | 2020-06-10 | 2020-10-13 | 海信（山东）空调有限公司 | Method for controlling low-temperature heating start of air conditioner, air conditioner and storage medium |
| CN112797669A (en) * | 2021-01-05 | 2021-05-14 | 珠海格力电器股份有限公司 | Heat pump system, control method and control device thereof and air conditioning equipment |
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