CN1013300B - Air-conditioning apparatus - Google Patents
Air-conditioning apparatusInfo
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- CN1013300B CN1013300B CN 89101520 CN89101520A CN1013300B CN 1013300 B CN1013300 B CN 1013300B CN 89101520 CN89101520 CN 89101520 CN 89101520 A CN89101520 A CN 89101520A CN 1013300 B CN1013300 B CN 1013300B
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Abstract
A multiroom air conditioning apparatus includes an outdoor side unit having a compressor and an outdoor heat exchanger, and a plurality of room units having an indoor heat exchanger. A high-pressure gas pipe and a low-pressure gas pipe, connected to the compressor, are branched so that a high-side branch pipe and a low-side branch pipe are connected to the outdoor heat exchanger via outside valves. A liquid pipe through which a refrigerant passes from the high-pressure gas pipe is connected to the outdoor heat exchanger, and branched to provide liquid pipes. The indoor heat exchanger is connected to the branched liquid pipes via expansion device and to the high-side branch pipe and the low-side branch pipe via inside valves. By controlling the outside and inside valves, a selected room unit or units can be cooled or heated.
Description
The present invention relates to have the multicell air-conditioning equipment of an outdoor unit and multicell unit, it is suitable for all coolings or the heat supplies simultaneously of many rooms, when also being adapted at a room cooling and to other room heat supply.
Can give a room cooling in many rooms simultaneously and give the multicell air-conditioning equipment of other room heat supply has been 52-24710/1977 in the patent No., proposes in the Japan Patent of 52-24711/1977 and 52-27459/1977 and in 54-3030/1979 number Japanese Utility Model patent.
In above-mentioned 52-24710/1977 and 52-24711/1977 Japan Patent, in the disclosed multicell air-conditioning equipment, require installing and corresponding to four-port conversion value of outdoor unit number and outdoor heat converter.Therefore make the construction of pipe network become complicated, manufacturing cost increases.Owing to need to draw two pipelines to indoor between each self-contained flat from outdoor unit, increased the pipeline in the unit, therefore disposing pipeline just becomes very difficult.And when room cooling and heat supply operation, cooling in promptly a lot of rooms and other room heat supply simultaneously, each outdoor heat converter corresponding with room unit plays a part condenser and evaporimeter, and its external liberated heat can not be recovered.
In above-mentioned 52-27459/1977 number Japanese Utility Model patent in the disclosed multicell air-conditioning equipment, the cooling in room and heat supply operation, promptly and under the situation of many other rooms heat supplies simultaneously at a cooling, this can cooling again can heat supply the position in room be to determine in advance, can not in all rooms, select a cooling and a heat supply of carrying out the room to operate arbitrarily.Can not use these air-conditioning equipments easily in other words.
The purpose of this invention is to provide a kind of multicell air-conditioning equipment that can address these problems.
Another object of the present invention provides a kind of new multicell air-conditioning equipment, and it allows in the branch road mode indoor unit and unit internal duct to be connected simply, thereby can make up the indoor unit of arbitrary number.
A further object of the present invention provides a kind of improved air-conditioning equipment, and this equipment can not only carry out the cooling operation simultaneously and carry out room heat supply operation simultaneously a lot of optional room units, and can carry out room cooling and heat supply operation simultaneously.
A further object of the invention provides a kind of air-conditioning equipment of improvement, change the capacity of compressor with variable volume and the load of outdoor heat converter according to heat exchanger temperature in indoor or the room unit or refrigerant pressure, so this equipment can carry out the cooling and the heat supply operation of a room unit arbitrarily.
Another purpose of the present invention provides a kind of air-conditioning equipment, because heat exchanger possesses effective heat recovery power, so it can carry out the cooling and the heating operation in many rooms effectively.
Air-conditioning equipment provided by the invention comprises an outdoor unit, it has compressor and the outdoor heat converter that contacts with outside air or water, also have many room units, each unit has with room air and contacts, the selectable indoor heat converter of heat supply or cooling, there is a high-pressure gas pipe there, the one end links to each other with described compressor, and many high-pressure sides arm arranged, a low-pressure gas pipe is arranged, the one end links to each other with described compressor, and be connected with many low-pressure side arms, at least one high-pressure side arm and at least one low-pressure side arm, link to each other with an end of described outdoor heat converter by the outdoor valve of regulating refrigerant flow, the other parts of described high-pressure side arm are connected with the secondary arm, the other parts of described low-pressure side arm also are connected with the secondary arm, described secondary high-pressure side arm links to each other with an end of each indoor heat converter by the inner valve that changes refrigerant flow with described secondary low-pressure side arm, the liquid line that also has the liquid arm that links to each other with the other end of described outdoor heat converter and have, each liquid arm links to each other with the other end of each indoor heat converter by expansion gear, wherein, the other parts of described high-pressure side arm, at least the part of every secondary high-pressure side arm, the other parts of described low-pressure side arm, at least the part of every secondary low-pressure side arm, the described liquid line of part and at least the part of every liquid arm be installed between described outdoor unit and each room unit.
According to another embodiment of the invention, the aircondition that provides comprises: an outdoor unit, and it has the compressor and the outdoor heat converter that contacts with outside air or water of volume-variable; A lot of room units, they have with indoor gas and contact, and can select the indoor heat converter of heat supply or cooling; Also comprise the controller that is fit to the described compressor with variable volume of control and changes the cryogen flow metered valve, there, article one, an end of gases at high pressure pipeline links to each other with described compressor, the high-pressure side arm is housed, article one, an end of low-pressure gas pipe links to each other with described compressor, the low-pressure side arm is housed, at least one high-pressure side arm links to each other with an end of described outdoor heat converter by described external valve with at least one low-pressure side arm, the other parts of described high-pressure side arm are connected with secondary high-pressure side arm, the other parts of described low-pressure side arm are connected with secondary low-pressure side arm, and described secondary high-pressure side arm links to each other with an end of each indoor heat converter by inner valve with described secondary low-pressure side arm; Article one, liquid line links to each other with the other end of described outdoor heat converter and many liquid arms is housed, described each branched pipe links to each other with the other end of each indoor heat converter by expansion gear, wherein operation control has the given mechanism of capacity, be used for during the cooling in room and heat supply operation are carried out simultaneously, desired second compressor capacity of many room units of desired first compressor capacity of certain room unit of cooling and heat supply is compared, here at least one room unit is cooling operation and remaining indoor unit is the heat supply operation, and the compressor of operating described volume-variable makes it be operated in higher in described first compressor capacity and described second compressor capacity capability value.
A kind of aircondition is provided in yet another embodiment of the present invention, and it comprises that an outdoor unit is equipped with the compressor and the outdoor heat converter that contacts with outside air or water of volume-variable; Many room units have and contact the indoor heat converter that can select heat supply or cooling with room air; The operation control that is fit to described compressor with variable volume of control and change refrigerant flow valve, many described outdoor heat converters are wherein arranged, article one, an end of high-pressure gas pipe links to each other with described compressor, and the high-pressure side arm is housed, article one, an end of low-pressure gas pipe links to each other with described compressor, and the low-pressure side arm is housed, article at least two, the high-pressure side arm links to each other with an end of described outdoor heat converter by valve with at least two low-pressure side arms, the other parts of described high-pressure side arm connect secondary high-pressure side arm, the other parts of described low-pressure side arm connect secondary low-pressure side arm, described secondary high-pressure side arm links to each other with an end of each indoor heat converter by valve with secondary low-pressure side arm, article one, liquid line links to each other with the other end of each outdoor heat converter, and have a liquid arm, described liquid arm links to each other with the other end of each indoor heat converter by expansion gear, wherein said operation control has capacity and changes mechanism, it is fit to the temperature according to described indoor heat converter, refrigerant pressure and from the indoor air temperature of described room unit discharging at least one parameter, control described capacity and valve.
In order to cool off all rooms immediately, the switching valve of whole outdoor heat converters and the switching valve of whole indoor heat converters all are arranged on refrigeration condition.Therefore, the refrigerant of discharging in the compressor by volume-variable flows into each outdoor heat converter simultaneously from delivery pipe, and refrigerant is condensation and liquefaction there, and gained liquid is assigned to refrigerant decompressor in the room unit by liquid line.After liquid evaporated in these indoor heat converters, steam was inhaled into the compressor of volume-variable by low-pressure gas pipe by described order.Indoor heat converter as evaporator operation all cools off all rooms like this.
In such cooling down operation, when the temperature of indoor heat converter was not less than 2 ℃, the compressor of volume-variable was operated under the capacity that each room unit requires.When the temperature of these indoor heat converters when being reduced to 2 ℃, the gloomy capacity that only increases compressor.When this temperature further drops to when being lower than 0 ℃, the capacity that coagulates little compressor freezes to prevent indoor heat converter.
In order to heat all rooms simultaneously, the switching valve of outdoor heat converter and the switching valve of indoor heat converter all are arranged on heated condition.Therefore the refrigerant of discharging from the compressor of volume-variable is assigned to each indoor heat converter by described order by delivery pipe and high-pressure gas pipe, and refrigerant is condensed and liquefies there.Gained liquid relevant expansion gear and the joint on the liquid line of flowing through.Liquid flows into each outdoor heat converter and evaporation there simultaneously then, and the steam of generation is inhaled into compressor by low-pressure gas pipe.Therefore, each indoor heat converter as condenser working heats whole rooms.
When the temperature of indoor heat converter is not higher than 58 ℃, forbid increasing the capacity of compressor, further to bring up to when being higher than 60 ℃ when this temperature, the capacity that reduces compressor raises to prevent high pressure undesiredly.
For example: in order to cool off two optional rooms and room of heating simultaneously, the switching valve of an outdoor heat converter is arranged on refrigeration condition, and the switching valve of other outdoor heat converter all cuts out, and switching valve that will the cooling room unit is arranged on refrigeration condition and wanting the switching valve of heat supply room unit to be arranged on the heat supply state.Therefore, the part refrigerant of discharging from the compressor of volume-variable by high-pressure air pipe only flows into that outdoor heat converter of at first mentioning, all the other refrigerant flow into the heat exchanger in the room unit of wanting heat supply, and refrigerant is condensed and liquefies in these indoor and outdoors heat exchangers.The refrigerant of condensation and liquefaction is assigned to the expansion gear of the room unit of wanting cooling in these indoor and outdoors heat exchangers, evaporates in indoor heat converter,, is inhaled in the compressor of volume-variable by the low pressure tracheae by described order.Therefore by as an indoor heat converter of condenser working to a room heat supply, by as other indoor heat converter of evaporator operation to these two room coolings.
During cooling and heat supply are operated in such, indoor heat converter temperature when the cooling unit is not less than 2 ℃, and the indoor heat converter temperature of heat supply unit is not when being higher than 58 ℃, the desired compressor capacity in heat supply unit relatively, the variable compressor of operation capacity higher capacity in the two.When these temperature conditions do not satisfy, indoor heat converter temperature according to these unit that carry out cooling and heat supply operation, the load of control room outer heat-exchanger, the perhaps gloomy compressor capacity that only increases, perhaps reduce compressor capacity, can prevent that thus indoor heat converter from freezing and preventing the undesired rising of high pressure.
Fig. 1 is the aircondition first embodiment refrigerant flow process figure of the present invention.
Fig. 2 is the load diagram of first embodiment of the invention.
Fig. 3 is the flow chart of first embodiment of the invention.
Fig. 4 is the refrigerant flow process figure of aircondition second embodiment of the present invention.
Fig. 5 is the refrigerant flow process figure of aircondition the 3rd embodiment of the present invention.
Fig. 6 is the refrigerant flow process figure of aircondition the 4th embodiment of the present invention.
Fig. 7 is the refrigerant flow process figure of fifth embodiment of the invention.
Fig. 8 is the refrigerant flow process figure of aircondition the 6th embodiment of the present invention.
Fig. 9 is the refrigerant flow process figure of aircondition the 7th embodiment of the present invention.
Figure 10 is the refrigerant flow process figure of aircondition the 8th embodiment of the present invention.
To first embodiment of the present invention be described with reference to figure 1.Outdoor unit has the compressor with variable volume 2 that can change operating frequency by converter, as outdoor heat converter 3a, 3b and gas-liquid separator 4. Room unit 5a, 5b, 5c have heat exchanger 6a, 6b, 6c.Outdoor heat converter 3a, 3b are connected with high-pressure air pipe 7 of drawing from the compressor 2 of volume-variable and low pressure tracheae 8 through high-pressure side arm 7a by external valve 9a, 10a, 9b, 10b.The internal element pipe network 11 that outdoor unit 1 and room unit 5a, 5b, 5c are connected together comprises high-pressure air pipe 12, it is in bifurcation and its binding of high-pressure air pipe 7, low pressure tracheae 13, it links the bifurcation of low pressure tracheae 8, liquid line 14 links to each other with outdoor heat converter 3a, 3b, also has secondary high-pressure side arm 12a, 12b, 12c and secondary low-pressure side arm 13a, 13b, 13c and liquid arm 14a, 14b, 14c.Indoor heat converter 6a, 6b, 6c link to each other with secondary high-pressure side arm 12a, 12b, 12c and secondary low-pressure side arm 13a, 13b, 13c respectively, and link to each other with liquid arm 14a, 14b, 14c by expansion gear 17a, 17b, the 17c with electric expansion valve by inner valve 15a, 16a, 15b, 16b, 15c, 16c.
High-pressure side arm 12 also links to each other with liquid line 14 by bypass 18, and capillary 19 provides the flow resistance of refrigerant.
Steam pressure control valve 20 also is equipped with at other position at low-pressure side arm 13, and auxiliary expansion device 21a, the 21b that has electric expansion valve is installed on liquid line 14.Reference number 22a and 22b represent outdoor fan, 23a, 23b, 23c agent's room inner blower.
Show room cooling and heat supply mode switching mechanism 24a, 24b, 24c among the figure.In room unit 5a, 5b, 5c, mounting temperature sensor 25a, 25b, 25c, room temperature is detected by them.When the temperature that detects is higher than set-point, give the cooling instruction, these detected temperature are lower than set-point on the contrary, give the heat supply instruction, therefore, with regard to the revolutions per minute of corresponding connection inner valve 15a, 16a, 15b, 16b, 15c, 16c, control room inner blower 23a, 23b, 23c.
Capacity control device in the reference number 26 expression outdoor units 1.Detect the temperature of indoor heat converter 6a, 6b, 6c with sensor 27a, 27b, 27c.Shown in Fig. 2 load diagram, when the temperature that is not less than indoor heat converter 6a, 6b, the 6c of 2 ℃ and heat supply unit when the indoor heat converter temperature of cooling unit is not higher than 58 ℃, with the desired compressor capacity input in the desired compressor capacity in cooling unit and heat supply unit room cooling and heat supply switching mechanism 24a, 24b, 24c separately, and compare mutually, by higher volume operation compressor with variable volume in the two.When not satisfying these temperature conditions, external valve 9a is opened or closed to temperature according to cooling unit and heat supply unit, 10a, 9b, 10b so that the load of control room outer heat-exchanger 3a, 3b, but forbids increasing the capacity of compressor with variable volume 2, do not reduce simultaneously the capacity of compressor 2, with the revolutions per minute of capacity control device 26 control outside blower fan 22a, 22b yet.
With reference to the load diagram of figure 2 and the flow chart of Fig. 3, the operation of Fig. 1 embodiment is described now.Cooling in all room unit 5a, 5b, 5c and heat supply switching mechanism 24a, when 24b, 24c require cooling, the inner valve 15a of a side, 15b, 15c close, the inner valve 16a of opposite side, 16b, 16c open.Indoor fan 23a, 23b, 23c begin operation.The cooling signal input capacity control device 26 that provides from cooling and heat supply switching mechanism 24a, 24b, 24c.So compressor with variable volume 2 puts into operation, its capacity (operating frequency 95Hz) is equivalent to the summation of the compressor capacity (for example operating frequency 30Hz) and the compressor capacity (for example operating frequency 40Hz) that room unit 5c requires of desired compressor capacity of room unit 5a (for example, operating frequency 25Hz) and room unit 5b requirement.Simultaneously outdoor fan 22a, 22b put into operation, and the external valve 9a of a side, 9b open and external valve 10a, the 10b of opposite side close.Therefore, cross discharge pipe 7 from the refrigerant that compressor with variable volume 2 is discharged by described sequential flow, external valve 9a, 9b and outdoor heat converter 3a, 3b are condensed and liquefy.The refrigerant that obtains is assigned to expansion gear 17a, 17b, 17c in room unit 5a, 5b, the 5c by liquid line 14, and refrigerant pressure reduces in device 17a, 17b, 17c.So refrigerant evaporates in indoor heat converter 6a, 6b, 6c, the steam of generation passes through inner valve 16a, 16b, 16c by described order, low-pressure side arm 13, and suction line 8 and storage are irritated 4 and are inhaled into compressor with variable volume 2.Like this by as indoor heat converter 6a, the 6b of evaporator operation, 6c with the refrigeration simultaneously of all rooms.Also available auxiliary expansion device 21a, 21b make the refrigerant decompression, and without expansion gear 17a, 17b, 17c.
In this while cooling and heat supply operating period, by bypass pipe 18 influent pipes 14, so refrigerant and lubricating oil can not be stuck in this high-pressure side arm 12 to the refrigerant of discharging from compressor with variable volume 2 from another high-pressure side arm 12.One end of bypass pipe 18 can be linked high-pressure side arm 12, and its other end links to each other with another low-pressure side arm 13.
In so simultaneously cooling and heat supply operating period, work as room temperature, when for example the temperature of room unit 5b or 5c has reached set-point, according to the stop signal of being sent from cooling or heat supply switching mechanism 24b or 24c cooling is stopped, cause that the cooling load reduces, the operating frequency of the compressor 2 of volume-variable is reduced to 65Hz or 55Hz, and compressor operation is in low capacity.
When the indoor heat converter temperature in the A district that is not less than 2 ℃ shown in Figure 2, in this cooling operating period, compressor with variable volume 2 operates in the desired capacity of each room unit.When the temperature of indoor heat converter is reduced to 2 ℃ when entering the B district, forbid increasing the capacity of compressor 2.When this temperature further is brought down below 0 ℃ when entering the C district, the capacity that reduces compressor 2 freezes to prevent indoor heat converter.
On the contrary, when the cooling in all room unit 5a, 5b, 5c and heat supply switching mechanism 24a, 24b, 24c provide the heat supply instruction, the inner valve 15a of one side, 15b, 15c open and inner valve 16a, the 16b of opposite side, when 16c closes, the heat supply signal input capacity compressor with variable 2 that sends from cooling and heat supply switching mechanism 24a, 24b, 24c.Therefore, compressor 2 is operated (operating frequency 110Hz) under given capacity, its value is equivalent to the desired compressor capacity of room unit 5a (as operating frequency 30Hz) and desired compressor capacity of room unit 5b (as operating frequency 35Hz) and the desired compressor capacity of room unit 5c (as operating frequency 45Hz) sum.Simultaneously, the external valve 9a of a side, 9b close and opposite side external valve 10a, 10b unlatching.As a result, the refrigerant of discharging from compressor with variable volume 2 is assigned to inner valve 15a, 15b, 15c and indoor heat converter 6a, 6b, 6c by described order by high-pressure air pipe 7 and another high pressure arm 12, condensation there, liquefaction.By the pressure of expansion gear 17a, 17b, 17c or auxiliary expansion device 21a, 21b reduction gained refrigerant, refrigerant flows into liquid line 14 then.Gained refrigerant evaporates in outdoor heat converter 3a, 3b, and by external valve 10a, 10b, suction line 8 and storage tank 4 are inhaled into compressor with variable volume 2 by described order.Like this by as indoor heat converter 6a, the 6b of condenser working, 6c to the heat supply simultaneously of all rooms.
In such heat supply operating period, work as temperature, when for example the temperature of room unit 5b or 5c reaches set-point, the stop signal of sending according to cooling and heat supply switching mechanism 24b or 24c stops heat supply, and sends the operating frequency that signal makes compressor with variable volume 2 by capacity control device 26 and reduce to 75Hz or 65Hz.
In such heat supply operation, when the temperature of indoor heat converter is positioned at when not being higher than 58 ℃ A district shown in Fig. 2, compressor with variable volume 2 is desired to the constant volume work of finishing drilling at each room unit.Be higher than 58 ℃ when entering oral region when the indoor heat converter temperature is elevated to, forbid increasing the capacity of compressor 2.Be higher than 60 ℃ when entering the E district when this temperature further rises to, the capacity that reduces compressor 2 is to prevent the abnormal rising of high pressure.
In order to give two room coolings simultaneously and to give a room heat supply, as any two room units for example cooling and heat supply switching mechanism 24a, the 24c among 5a, the 5c require cooling, therefore close each inner valve 15a, 15c, open inner valve 16a, the 16c of opposite side, and the cooling in any one room unit such as the 5b and heat supply switching mechanism 24b require heat supply, therefore the inner valve 15b that opens in a side and close another inner valve 16b.Simultaneously, the desired compressor capacity of room unit 5c (for example operating frequency 40Hz) sum (operating frequency is 65Hz) of desired compressor capacity of room unit 5a of cooling (for example operating frequency 25Hz) and cooling compares mutually with the desired compressor capacity of room unit 5b (for example operating frequency 50Hz) of heat supply.Send control signal from capacity control device 26, make compressor with variable volume operate on the higher capability value, it is exactly two desired total compressor capacity of room unit 5a, 5c that require cooling, signal according to capacity control device 26, open an external valve 9a, close other external valve 9b, 10a, 10b.Therefore, the part refrigerant of discharging from compressor with variable volume 2 can only pass through discharge pipe 7 and external valve 9a inflow outdoor heat exchanger 3a in proper order, and inner valve 15b and heat exchanger 6b that other refrigerant flows in the room unit 5b by high-pressure air pipe 12, refrigerant is condensed and liquefies in these indoor heat converters 6b and outdoor heat converter 3a.The refrigerant that liquefies that is condensed in these heat exchangers 6b and 3a is reduced pressure by the film among room unit 5a, the 5c bloated device 17a, 17c by liquid line 14.Gained refrigerant evaporates in each indoor heat converter 6a, 6c, flows into low pressure tracheae 13 by inner valve 16a, 16c then, and order is inhaled into compressor with variable volume 2 by low pressure tracheae 8 and storage tank 4 then.Like this, by as the indoor heat converter 6b of condenser working to a room heat supply, by as indoor heat converter 6a, the 6c of evaporator operation to other two room coolings.
In summer, the outside air temperature height when carrying out this while cooling and heat supply operation, had both made outdoor fan 22a high speed rotating, and only operating room outer heat-exchanger 3a can't transfer to heat in the outdoor air fully and go.Therefore, when the temperature of indoor heat converter 6a, 6c is higher than 2 ℃ when entering the F district that the refrigeration capacity reduces, open external valve 9b according to the signal that sends from capacity conversion equipment 26, the part refrigerant of discharging from high-pressure air pipe 7 flows into another outdoor heat converter 3b, and refrigerant is condensed, liquefies there.Refrigerant in gained refrigerant and the liquid line 14 lumps together, by as the outdoor heat converter 3b of condenser working further with transfer of heat to outdoor air, so can prevent reducing of cooling capacity.During summer, in this operation, when the temperature in the room unit 5c reaches set-point, the signal that is sent according to cooling and heat supply switching mechanism 24c stops cooling, cause that the refrigeration load reduces, the desired compressor capacity of room unit 5a (for example operating frequency 25Hz) of cooling and the desired compressor capacity of room unit 5b (for example operating frequency 50Hz) of heat supply are compared, send control signal so that the compressor operation of volume-variable bigger one (for example operating frequency 50Hz) these two capacity from capacity control device 26.
Carry out this while cooling and heat supply when operation in the winter time, outdoor air themperature is low, influence refrigerant, makes its pressure also low, so refrigerant pressure often drops to and is lower than 4kg/cm among heat exchanger 6a, the 6c in room unit 5a, the 5c of cooling
2But can prevent that by adjusting evaporating pressure regulating valve 20 this pressure from reducing, thereby indoor heat converter 6a, 6c can not freezed.This evaporating pressure regulating valve 20 can be installed on every 13a, 13b between valve 16a, 16b, 16c and the low pressure tracheae 13,13c pipeline, rather than is contained on this low pressure arm 13.The pressure of refrigerant drops to and is lower than 4kg/cm in indoor heat converter 6a, 6c
2The time, but also inoperation like this installing evaporating pressure regulating valve 20 and only reduce the aperture of expansion gear 17a, 17c, to increase the degree of superheat of refrigerant, prevent with overheated heat and freeze, the aperture with expansion gear 17a, 17c when antifreeze operation is finished increases to original aperture.
In order to cool off a room and two rooms of heating, operate auxiliary expansion device 21a.For example, when the cooling of any two room unit 5a, 5c and heat supply switching mechanism 24a, 24c require heat supply, just open each inner valve 15a, 15c, and close other inner valve 16a, 16c.Simultaneously, the cooling of room unit 5b and heat supply switching mechanism 24b require cooling, so open inner valve 16b.Therefore, the desired compressor capacity of separate room, room 5a of heat supply (for example, operating frequency 45Hz) and the desired compressor capacity of room unit 5c of heat supply (for example, operating frequency 40Hz) sum (for example, operating frequency 85Hz) the desired compressor capacity of room unit 5b (for example operating frequency 35Hz) with cooling compares, send control signal by capacity control device 26, so that compressor with variable volume operates in capability value higher in the two (operating frequency 85Hz), the just total capacity of heat supply room unit.According to the signal of capacity control device 26, open external valve 10a, and close other external valve 9a, 9b, 10b.
Therefore, the refrigerant of discharging from compressor with variable volume 2 passes through high-pressure air pipe 7 and high-voltage tube 12 in proper order, and inner valve 15a, 15c enter each indoor heat converter 6a, 6c, are condensed there, liquefy.The refrigerant of liquefaction is by expansion gear 17a, the 17c influent pipe 14 of standard-sized sheet.In this liquid line 14, part refrigerant reduces pressure in expansion gear 17b, and gained refrigerant evaporates in indoor heat converter 6b.Remaining liquid refrigerant reduces pressure in auxiliary expansion device 21a, and gained refrigerant evaporates in outdoor heat converter 3a.The evaporated liquid order is inhaled into compressor with variable volume 2 by suction line 8 and gas-liquid separator 2.Like this, be two room heat supplies by indoor heat converter 6a, 6c as condenser working, be a room cooling by indoor heat converter 6b as evaporator operation.
In winter, outside air temperature is low, when carrying out this room while cooling and heat supply operation, has both made outdoor fan 22a high speed rotating, can not only obtain sufficient thermal source by operating room outer heat-exchanger 3a from outdoor air.When being reduced to, the temperature of indoor heat converter 6a, 6c is lower than 58 ℃ when entering the lower G district of room heat supply capacity so, open external valve 10b according to the signal of capacity control device 26, operation auxiliary expansion device 21b, so another outdoor heat converter 3b is also as evaporator operation.So can prevent reducing of room heat supply capacity.When carrying out this operation in the winter time, work as temperature, when reaching set-point as the temperature of 5 ℃ of room units, the signal that sends according to cooling and heat supply conversion equipment 24c makes this room stop heat supply, the desired compressor capacity of room unit 5b of desired compressor capacity of room unit 5a of heat supply (for example operating frequency 45Hz) and cooling (for example, 35Hz) compare, the control signal that capacity control device 26 sends is so that compressor with variable volume 2 higher capability value in the two is operated (operating frequency 45Hz), the i.e. desired capacity in heat supply unit.
In spring or autumn, when carrying out this while cooling and heat supply operation, rise to as the temperature of the indoor heat converter 6b of evaporator operation and to be higher than 2 ℃ when entering the F district that the cooling capacity reduces, according to the signal of capacity conversion equipment 26, outdoor fan 22a transforms to low-speed handing until shutting down from high speed operation.Therefore, the speed that reduces draw heat from outdoor air reduces to prevent the cooling capacity.When the cooling capacity further reduces, open external valve 9a, 10a so that outdoor heat converter 3a as condenser working.
When the temperature of the indoor heat converter of the indoor heat converter of cooling and heat supply enters the H district, forbid increasing the capacity of the compressor 2 of volume-variable.When this temperature enters the I district, reduce compressor capacity and freeze with the indoor heat converter that prevents cooling, the indoor heat converter temperature that detects heat supply raises to prevent high pressure undesiredly.
Like this, comparative result according to temperature, cooling and heat supply switching mechanism 24a, 24b, 24c send cooling and heat supply instruction arbitrarily, just can automatically carry out cooling and heat supply to indoor unit 5a, 5b, 5c, capacity conversion equipment 26 as condenser or evaporator operation, can carry out cooling and heat supply according to big or small operating room outer heat-exchanger 3a, the 3b of cooling and heating demand thus effectively.And indoor heat converter 6a, the 6b, the 6c that are used as evaporation or condenser working also carries out heat recovery cooling and heat supply operating period at the same time, therefore can further increase operating efficiency.
In all room heat supplies, during as the outdoor heat converter 3a of evaporator operation, 3b frosting, open external valve 9a and close another side valve 10a according to the signal of capacity conversion equipment 26, to introduce outdoor heat converter 3a from the part hyperthermia induced cryogen that discharge pipe 7 is discharged, thereby make this outdoor heat converter defrosting.Close this external valve 9a then and open another external valve 10a, make described outdoor heat converter 3a again as evaporator operation.Simultaneously, open external valve 9b and close external valve 10b, will introduce another outdoor heat converter 3b, therefore make this outdoor heat converter 3b defrosting from the part hyperthermia induced cryogen that discharge pipe 7 is discharged.Because outdoor heat converter 3a, 3b alternately defrost, the heat supply operation in all rooms can be carried out continuously like this.
When room while cooling and heat supply, among outdoor heat converter 3a, the 3b one is as evaporator operation and another stoppage in transit, when as the outdoor heat converter 3a frosting of evaporator operation, connect or close external valve 9a, the 10a of a side according to the signal of capacity conversion equipment 26, so that outdoor heat converter 3a defrosting, connect or close external valve 9b, the 10b of opposite side simultaneously so that make outdoor heat converter 3b, therefore can carry out cooling and heat supply continuously simultaneously like this as evaporator operation.
For example, when above-mentioned all rooms all are in the cooling operation, a certain room unit 5b will change into the heat supply operation, in order to change, two inner valve 15b, 16b will close, and increase the opening degree of expansion gear 17b slightly, to increase the refrigerant pressure in the household heater 6b in advance, therefore open inner valve 15b then, can prevent to produce that to cause that refrigerant sends the refrigerant pressure of noise poor.
Similarly, when all rooms all are in the heat supply operation, a certain room unit 5b will change into the cooling operation, in order to change, inner valve 15b and expansion gear 17b will close, and open a bit another inner valve 16 slightly, to force the pressure that reduces refrigerant in the indoor heat converter 6b, perhaps also shut inner valve 16b, allow the pressure of refrigerant reduces naturally in the indoor heat converter 6b.And then open inner valve 16b, it is poor to prevent the refrigerant pressure that makes refrigerant produce noise.
In order slightly to open inner valve 16b, so will be with motor-driven valve a kind of costliness, that opening degree is adjustable as inner valve 16b.Correspondingly, if the bypass capillary of the pressure that is used to raise is placed in and inner valve 16b and the parallel position of 16a, 16c, inner valve 16a, 16b, 16c just can use simple valve so.
In the described in the above embodiment, the temperature of indoor heat exchanger 6a, 6b, 6c is detected by sensor 27a, 27b, 27c.Except this temperature, also can detect at the indoor heat converter relevant refrigerant pressure of this temperature that neutralizes, perhaps in indoor heat converter, be heated temperature with refrigeration and the air that is blown.
Figure 4 shows that second embodiment of the present invention, when room unit 5c was the room of a need all-year-around cooling, as computer room, indoor heat converter 6c directly linked to each other with low-pressure gas pipeline 13 in this scheme, and without inner valve 15c, 16c.Each parts in this embodiment are omitted with identical reference numerals, its detailed explanation.
Figure 5 shows that the 3rd embodiment of the present invention.In this scheme, when indoor heat converter 6c is used for the room of annual heat supply operation and during as the hot water source of supply, it directly links to each other with gases at high pressure pipeline 12 and without inner valve 15c, 16c.All use identical reference number to mark with corresponding each parts of first embodiment of Fig. 1 in this embodiment, its detailed description is omitted.
Fig. 6 shows the 4th embodiment of the present invention.In this scheme, room unit 5a is a common room, and other room units 5b, 5c are installed in the specific bigger room, the shared valve 15b of room unit 5b, 5c, 16b.Therefore, room unit 5a realizes cooling and heat supply by the switch of inner valve 15a, 16a, and room unit 5b, 5c carry out cooling and heat supply simultaneously, are operated by inner valve 15b, 16b.This embodiment corresponding each several part of first embodiment that neutralizes is all used the same reference numbers mark, and its detailed explanation is omitted.
Figure 7 shows that the 5th embodiment of the present invention.The pipeline of room unit 5a, 5b, 5c links as showing among the figure in the scheme, this embodiment installing inner valve 15a, 16a, 15b, 16b, 15c, 16c, cooling agent dropping equipment 17a, 17b, 17c and check-valves 29a, 29b, 29c.When the room cooling, among expansion gear 17a, 17b, 17c, reduce pressure flow through then indoor heat converter 6a, 6b, 6c, inner valve 16a, 16b, 16c and low-pressure gas pipe 13 from the liquid cryogen elder generation of fluid pipeline 14.When heating, from the gaseous refrigerant of gases at high pressure pipeline 12 flow through inner valve 15a, 15b, 15c, indoor heat converter 6a, 6b, 6c, check-valves 29a, 29b, 29c and fluid pipeline 14 in the room.The remainder of these operations is the same with the appropriate section of first embodiment.The neutralize appropriate section of first embodiment of the 5th embodiment all marks with same reference numbers, and its detailed description is omitted.
Figure 8 shows that the 6th embodiment of the present invention.In this scheme, indoor heat converter 6a, 6b, 6c are divided into two, first kind heat exchanger 61a, 61b, 61c and the second class heat exchanger 62a, 62b, 62c are promptly arranged, and in the middle of this class heat exchanger, dry expansion gear 30a, 30b, the 30c that has electric expansion valve is installed.When the room cooling, earlier by expansion gear 17a, 17b, 17c with liquid refrigerant step-down in the fluid pipeline 14, cryogen flow is through first kind heat exchanger 61a, 61b, 61c then, dry expansion gear 30a, 30b, the 30c of standard-sized sheet, the second class heat exchanger 62a, 62b, 62c and inner valve 16a, 16b, 16c, the room is by first, second class heat exchanger 61a, 62a, 61b, 62b, 61c, 62c cooling as evaporator operation.Simultaneously, when the room heat supply, from the gaseous refrigerant of gases at high pressure pipeline 12 flow through inner valve 15a, 15b, 15c, the second class heat exchanger 62a, 62b, 62c, dry expansion gear 30a, 30b, the 30c of standard-sized sheet, first kind heat exchanger 61a, 61b, 61c, expansion gear 17a, 17b, 17c and liquid line 14, the room is by first, second heat exchanger 61a, 62a, 61b, 62b, 61c, 62c heat supply as condenser working.
During drying, from the liquid refrigerant of fluid pipeline 14 flow through expansion gear 17a, 17b, 17c and first kind heat exchanger 61a, 61b, the 61c of standard-sized sheet and step-down in dry expansion gear 30a, 30b, 30c.Cryogen flow is through the second class heat exchanger 62a, 62b, 62c and inner valve 16a, 16b, 16c then.Room air cools off in as the second class heat exchanger 62a of evaporator operation, 62b, 62c, is heated, thereby dries at first kind heat exchanger 61a, 61b, 61c as condenser working again.The same by the control operation that room cold and heat supply switching mechanism 24a, 24b, 24c and capacity conversion equipment are implemented with the first above-mentioned embodiment.The 6th embodiment neutralizes, and first embodiment is corresponding partly all uses identical reference number to mark, and its detailed description is omitted.
Figure 9 shows that the 7th embodiment of the present invention.In room unit 5a, the cooling in room, heat supply can be operated inner valve 15a, 16a and implement arbitrarily.In another room unit 5b, when by operation inner valve 15b, 16b, 15c, when 16c makes indoor heat converter 6b, 6c as evaporator operation, realize cooling; When by same group of valve of operation, and when making indoor heat converter 6b, 6c, realize heat supply as condenser working; When indoor heat converter 6b, 6c respectively as evaporimeter and condenser working, and during the adjustable humidifier 31 of installing humidity, realize drying.The control operation of being implemented by room cold and heat supply switching mechanism 24a, 24b and capacity control device 26 is the same with first embodiment among above-mentioned Fig. 1.And all use the same reference numbers mark with the above-mentioned corresponding part of first embodiment in the 7th embodiment, its detailed description is omitted.
Figure 10 shows that the 8th embodiment of the present invention.This embodiment and first embodiment difference are: two outdoor unit 1a, 1b are installed, and unit 1a comprises the compressor 2a of volume-variable, outdoor heat converter 3a, gas-liquid separator 4a, external valve 9a, 10a and auxiliary expansion device 21a; Another unit 1b comprises the compressor 2b of capacity constant, and its capacity is constant, outdoor heat converter 3b, gas-liquid separator 4b, external valve 9b, 10b and auxiliary expansion device 21b; Be connected to refrigerant discharge tube 7a, the 7b of high-pressure gas pipe 12, be connected to refrigerant suction line 8a, the 8b of low-pressure gas pipe 13.The conversion of the compressor 2a of volume-variable, the start and stop of capacity constant compressor 2b, the switching of switching valve 9a, 10a, 9b, 10b, 15a, 16a, 15c, 16c is to use the mode identical with first embodiment, the control operation of implementing by cold and heat supply switching mechanism 24a, 24b, 24c and capacity conversion equipment 26a, 26b realizes, therefore can realize all coolings of all rooms, all rooms are heat supply and room simultaneous air-conditioning all.
In the above in each embodiment, be with 2 or 3 indoor unit 5a, 5b, 5c.Even when using the room unit that is no less than 4 different capabilities, they can link to each other with unit internal pipeline 11 with bifurcation approach simply.If outdoor heat converter or outdoor unit are connected according to room unit quantity with bifurcation approach, can increase the quantity of outdoor heat converter or outdoor unit so at an easy rate.Compressor with variable volume 2,2a can be installed in the outdoor unit that does not have heat exchanger 3a, 3b.In addition, the compressor 2 of volume-variable, 2a also can use the frequency transformation compressor.
In the embodiment, switching valve 9a, 10a, 9b, 10b, 15a, 16a, 15b, 16b, 15c, 16c use two-way valve in the above.Also can replace switching valve 9a, 10a, 9b, 10b with 5 triple valves.
In the embodiment, most of outdoor heat converter 3a, 3b make separately in the above, can certainly wholely make.
According to the present invention, the unit internal pipeline that outdoor unit and many room units are linked together comprises high-pressure gas pipe, low-pressure gas pipe and liquid line.Therefore by room unit and the simple method that links of unit internal pipeline being made up the room unit of arbitrary number with bifurcation approach.So not only can implement a large amount of optional room units cooling and heat supply simultaneously simultaneously, and can implement each room simultaneous air-conditioning operation.In addition, cooling at the same time, in heat supply simultaneously and the simultaneous air-conditioning, desired compressor capacity of cooling room unit and the desired compressor capacity of heat supply room unit are compared, the compressor of volume-variable is according to capacity work bigger among both, therefore, can under the only situation of compressor capacity, implement effective cooling and heat supply operation.The cooling of each room unit and heat supply can realize arbitrarily, temperature or refrigerant pressure according to heat exchanger in cooling and heat supply room unit, or the air themperature of discharging, change the capacity and the conversion outdoor heat converter load of the compressor of volume-variable, freeze the undesired increase with high pressure to prevent indoor heat converter.
In addition, since in the room simultaneous air-conditioning as the indoor heat converter of condenser working with in same operation, be that series connection links as the indoor heat converter of evaporator operation, so possess at heat exchanger on the basis of effective heat recovery effect, can realize effective room cooling and heat supply operation.
Certainly, the present invention is not limited to above-mentioned embodiment, and it can carry out various forms of modifications in the scope of appending claims.
Claims (4)
1, a kind of air-conditioning equipment, its feature comprises: be provided with the outdoor unit (1) that is made of the outdoor heat converter (3a) that contacts with outdoor air or water, (3b) and compressor (2); Be provided with the indoor heat converter (6a), the indoor unit (5a) of (6c), (5b), (5c) that regulate room air, an outdoor unit (1) links by highly pressurised liquid pipeline and low-pressure gas pipe (13) with several indoor units (6a), (6b), (6c);
Described air-conditioning equipment also is provided with high-pressure gas pipe (12), this high-pressure gas pipe is used to the gases at high pressure refrigerant that above-mentioned compressor (1) is discharged above-mentioned several in-room switch (6a) that lead respectively, (6b), (6c), and the outside of this high-pressure gas pipe (12) is divided into multiple branch circuit and forms gases at high pressure bypass duct (7a), this gases at high pressure bypass duct has one at least by the first outdoor transfer valve (9a), (9b) with above-mentioned outdoor heat converter (3a), an end (3b) links, and other bypass duct is by the first indoor transfer valve (15a), (15b), (15c) respectively with above-mentioned indoor heat converter (6a), (6b), an end (6c) links;
The indoor side of above-mentioned low-pressure gas pipe (13) is divided into multiple branch circuit and forms low-pressure gas auxiliary tube (13a), (13b), (13c), this low-pressure gas auxiliary tube (13a), (13b), (13c) are linked with the end of indoor heat converter (15a), (15b), (15c) respectively by the second indoor transfer valve (16a), (16b), (16c); The outside branch road of low-pressure gas pipe (13) is formed the low pressure branch road, and suction side (8a) and the second outdoor transfer valve (10a), (10b) of this low pressure bypass duct by above-mentioned compressor links to each other with the end of above-mentioned outdoor heat converter (3a), (3b);
One end of above-mentioned highly pressurised liquid pipe (14) links to each other with the other end of this outdoor heat converter (3a), (3b), and the other end of highly pressurised liquid pipe (14) links to each other with the other end of above-mentioned indoor heat converter (6a), (6b), (6c) by refrigeration pressure-reducing valve (17a), (17b), (17c).
2, by the described air-conditioning equipment of claim 1, it is characterized in that, several outdoor heat converters (3a), (3b), (3c) in this air-conditioning equipment, the one end is connected with the low-pressure gas bypass duct with above-mentioned gases at high pressure bypass duct (7a) by transfer valve (9a), (9b), (10a), (10b), and the other end of outdoor heat converter (3a), (3b) links to each other with highly pressurised liquid pipe (14);
By the described air-conditioning equipment of claim 1, it is characterized in that 3, it also has the compressor of adjustable power joint, and also is provided with PCU Power Conditioning Unit in the operation controller of this compressor; By PCU Power Conditioning Unit regulate so that and power demand coupling under the following situation, that is: has an indoor unit cooling operation at least, under all the other indoor units situation that to be the refrigeration that adds heat run carry out simultaneously with heating, the desired compressor horsepower of the indoor unit of cooling operation is compared with the desired compressor horsepower of indoor unit of heating running side, and a side big with power demand is complementary.
4, by the described air-conditioning equipment of claim 1, it is characterized in that, be provided with control device, power and transfer valve (9a) in order to control adjustable power type compressor, (9b), (10a), (10b), in this air-conditioning equipment, also have several outdoor heat converters (3a), (3b), by transfer valve (9a), (9b), (10a), (10b) with each outdoor heat converter (3a), an end (3b) links to each other with the low-pressure gas bypass duct with above-mentioned gases at high pressure bypass duct (7a), each outdoor heat converter (3a), the other end (3b) links to each other with above-mentioned highly pressurised liquid pipeline (14), and has adopted the adjustable type compressor that can change above-mentioned compressor (1) power; Control the control device of this compressor and transfer valve (9a), (9b), (10a), (10b), according to temperature separately or the refrigerant pressure of above-mentioned indoor heat converter (6a), (6b), (6c), or control the power of compressor and regulate transfer valve (9a), (9b), (10a), (10b) according to the indoor air temperature that above-mentioned indoor unit (5a), (5b), (5c) are arranged.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP75733/88 | 1988-03-29 | ||
| JP7573388A JPH01247967A (en) | 1988-03-29 | 1988-03-29 | Multi-room type air-conditioner |
| JP235806/88 | 1988-09-20 | ||
| JP63235806A JPH0285656A (en) | 1988-09-20 | 1988-09-20 | Airconditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1043380A CN1043380A (en) | 1990-06-27 |
| CN1013300B true CN1013300B (en) | 1991-07-24 |
Family
ID=26416889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89101520 Expired CN1013300B (en) | 1988-03-29 | 1989-03-20 | Air-conditioning apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013300B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100351588C (en) * | 2004-11-26 | 2007-11-28 | Lg电子株式会社 | Air conditioning system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100539570B1 (en) * | 2004-01-27 | 2005-12-29 | 엘지전자 주식회사 | multi airconditioner |
| KR20210096522A (en) * | 2020-01-28 | 2021-08-05 | 엘지전자 주식회사 | Air conditioning apparatus |
-
1989
- 1989-03-20 CN CN 89101520 patent/CN1013300B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100351588C (en) * | 2004-11-26 | 2007-11-28 | Lg电子株式会社 | Air conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043380A (en) | 1990-06-27 |
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