CN107763875A - Air-conditioning system - Google Patents
Air-conditioning system Download PDFInfo
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- CN107763875A CN107763875A CN201711008507.1A CN201711008507A CN107763875A CN 107763875 A CN107763875 A CN 107763875A CN 201711008507 A CN201711008507 A CN 201711008507A CN 107763875 A CN107763875 A CN 107763875A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
A kind of air-conditioning system of the present invention, the air-conditioning system include the first compressor, the first reversing piece, the second compressor, the second reversing piece, indoor heat exchanger, outdoor heat exchanger, first throttle part, the first communicating pipe, the second communicating pipe, third connecting pipe and the 4th communicating pipe.Air-conditioning system according to embodiments of the present invention have Two-stage Compression heating mode, single stage compress it is double open heating mode, single stage compress list opens that heating mode, single stage compress are double to open refrigeration mode and single stage compress list opens refrigeration mode.Therefore, the air-conditioning system of the embodiment of the present invention, on the premise of two-stage compressor is met, can also realize the single-stage compressor at general temperature singly open or double parallel operation patterns for driving compressor, air-conditioning system is not only enabled preferably to be heated when environment temperature is relatively low, conversion multiple-working mode can also be needed according to varying environment, that is, ensure that the job stability of air-conditioning system, in turn ensure that the heat exchange efficiency of air-conditioning system.
Description
Technical field
The present invention relates to air-conditioning equipment field, more particularly to a kind of air-conditioning system.
Background technology
Single stage compress air conditioner compression ratio increase, compressor displacement and efficiency when environment temperature is relatively low are remarkably decreased,
Heating capacity deficiency, can not meet requirement of the people to heat supply.Aerial air device is more empty using the auxiliary hot form increase of electricity at present
Heat is modulated, or more heats are obtained by lifting the operating frequency of compressor, but can bring pressure ratio excessive simultaneously
Problem, not only power consumption increase but also the problem of stability of a system be present.
One of existing feasible solution is to use bipolar compression, it is possible to achieve single stage compress is than in reasonable interval
Under the premise of cause the higher heating needs that disclosure satisfy that cold area of system pressure ratio.But defect is also more obvious, such as non-tight
Under the conditions of cold, high pressure stage compressor does not work, and wastes system configuration.Can not there is also during the refrigeration of high-temperature section, during refrigeration
The problem of meeting needs.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art.Therefore, the present invention proposes a kind of sky
Adjusting system, the air-conditioning system can also realize that single-stage is double and open compressor compresses, single-stage list on the premise of two stages of compression is realized
Open the functional mode of compressor compresses.
Air-conditioning system according to embodiments of the present invention, including：First compressor, first compressor have first exhaust
Mouth and the first gas returning port；First reversing piece, first reversing piece have commutation A mouths, commutation B mouths, commutation C mouths and commutation D mouths,
The commutation A mouths connect with one of in the commutation B mouths, the commutation C mouths, the commutation D mouths and the commutation B
Another connection in mouth, the commutation C mouths, the commutation A mouths are connected with the first row gas port, the commutation D mouths and institute
The first gas returning port is stated to be connected；Second compressor, second compressor have second exhaust port and the second gas returning port；Second commutation
Part, second reversing piece have commutation E mouths, commutation F mouths, commutation G mouths and commutation H mouths, the commutation E mouths and the commutation F
Mouthful, one of connection in the commutation G mouths, another in the commutation H mouths and the commutation F mouths, the commutation G mouths
Connection, the commutation E mouths are connected with the second exhaust port, and the commutation H mouths are connected with second gas returning port；Indoor heat exchange
Device, the first end of the indoor heat exchanger are connected with the commutation F mouths；Outdoor heat exchanger, the first end of the outdoor heat exchanger
It is connected with the commutation C mouths；First throttle part, the first throttle part be connected in series in the indoor heat exchanger the second end and
Between second end of the outdoor heat exchanger；First communicating pipe, the both ends of first communicating pipe respectively with the commutation B mouths and
The commutation G mouths are connected, and the first control valve is in series with first communicating pipe；Second communicating pipe, second communicating pipe
First end of the both ends respectively with the commutation B mouths and the indoor heat exchanger is connected, and second is in series with second communicating pipe
Control valve；Third connecting pipe, the both ends of the third connecting pipe first end with the outdoor heat exchanger and the commutation G respectively
Mouth is connected, and the 3rd control valve is in series with the third connecting pipe；4th communicating pipe, the both ends of the 4th communicating pipe respectively with
The first end of the outdoor heat exchanger is connected with second gas returning port, and the 4th control valve is in series with the 4th communicating pipe.
Air-conditioning system according to embodiments of the present invention have Two-stage Compression heating mode, single stage compress it is double open heating mode,
Single stage compress list opens that heating mode, single stage compress are double to open refrigeration mode and single stage compress list opens refrigeration mode.Therefore, the present invention is real
The air-conditioning system of example is applied, on the premise of two-stage compressor is met, the list of the single-stage compressor at general temperature can also be realized
Open or double parallel operation patterns for driving compressor, not only enable air-conditioning system preferably to be made when environment temperature is relatively low
Heat, conversion multiple-working mode can also be needed according to varying environment, that is, ensure that the job stability of air-conditioning system, protect again
The heat exchange efficiency of air-conditioning system is demonstrate,proved.
Air-conditioning system described in certain embodiments, in addition to：Reservoir, the reservoir have inlet and outlet,
The reservoir configurations discharge gaseous coolant after gas-liquid separation into the refrigerant flowed into from the import by the outlet；Reversal valve
Group, the commutation valve group have indoor connection end, outdoor connection end, liquid feeding end, outlet side, the indoor connection end and the room
Interior heat exchanger is connected, and the outdoor connection end is connected with the outdoor heat exchanger, and the liquid feeding end is connected with the import, described
Outlet side is connected with the outlet, and the reversal valve set constructor is into from the indoor connection end and outdoor connection end inflow
Liquid feeding end described in the equal single flow direction of refrigerant, the refrigerant at the outlet side be respectively facing the indoor connection end and it is described it is outdoor even
Connect end one-way flow.
Specifically, described air-conditioning system, in addition to：Second throttling element, second throttling element are connected in series in described
Between outlet side and the outlet of the reservoir.
Specifically, the commutation valve group includes：First check valve, the second check valve, the 3rd check valve and the 4th check valve；
Wherein, one end of first check valve and one end of second check valve are connected in series and connecting place forms the feed liquor
End, the other end of first check valve are connected with the outdoor heat exchanger, the other end and the room of second check valve
Interior heat exchanger is connected, and first check valve and second check valve structure are into unidirectional on the direction towards the liquid feeding end
Connection；One end of 3rd check valve and one end of the 4th check valve are connected in series and connecting place forms the outlet
End, the other end of the 3rd check valve are connected with the outdoor heat exchanger, the other end and the room of the 4th check valve
Interior heat exchanger is connected, and unidirectionally connects on outlet side described in the 3rd check valve structure Cheng Cong to the direction of the outdoor heat exchanger
It is logical, outlet side described in the 4th check valve structure Cheng Cong to unilaterally connected on the direction of the indoor heat exchanger.
In some optional embodiments, described air-conditioning system also includes：Economizer, the economizer has can be mutual
The first heat exchanger channels and the second heat exchanger channels of heat exchange, first heat exchanger channels are connected in series in the outlet and the outlet
Between end, the both ends of second heat exchanger channels are connected with the outlet and second gas returning port respectively；It is described for controlling
5th control valve of cold medium flux in second heat exchanger channels.
Specifically, the 5th control valve is connected in series between the outlet and second heat exchanger channels.
In certain embodiments, described air-conditioning system, in addition to：First oil-liquid separator, the first fluid separation
Device is connected in series between the first row gas port and the commutation A mouths；Second oil-liquid separator, second oil-liquid separator
It is connected in series between the second exhaust port and the commutation E mouths.
In certain embodiments, the pipeline between the first row gas port and first oil-liquid separator is provided with first
High-pressure pressure sensor, the pipeline between the first row gas port and the commutation A mouths are provided with the first high-voltage switch gear.
In certain embodiments, the pipeline between the second exhaust port and second oil-liquid separator is provided with second
High-pressure pressure sensor, the pipeline between the second exhaust port and the commutation A mouths are provided with the second high-voltage switch gear.
In certain embodiments, first reversing piece and second reversing piece are four-way valve.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the overall structure figure of the air-conditioning system of the embodiment of the present invention.
Fig. 2 is that the refrigerant that the air-conditioning system of the embodiment of the present invention is under Two-stage Compression heating mode flows to schematic diagram.
Fig. 3 is that the air-conditioning system of the embodiment of the present invention is in the double refrigerants opened under heating of single stage compress and flows to schematic diagram.
Fig. 4 be the embodiment of the present invention air-conditioning system be in single stage compress list open heating under refrigerant flow to schematic diagram.
Fig. 5 is that the air-conditioning system of the embodiment of the present invention is in the double refrigerants opened under refrigeration of single stage compress and flows to schematic diagram.
Fig. 6 be the embodiment of the present invention air-conditioning system be in single stage compress list open refrigeration under refrigerant flow to schematic diagram.
Reference：
Air-conditioning system 100,
First compressor 1, the first reversing piece 2, the second compressor 3, the second reversing piece 4, indoor heat exchanger 5, outdoor heat exchange
Device 6, first throttle part 7, the first communicating pipe 8a, the second communicating pipe 8b, third connecting pipe 8c, the 4th communicating pipe 8d, reservoir 9,
Import 9a, outlet 9b, the second throttling element 11,
Commutation valve group 10, the first check valve 10a, the second check valve 10b, the 3rd check valve 10c, the 4th check valve 10d, enter
Liquid end S1, outlet side S2, indoor connection end S3, outdoor connection end S4,
Economizer 12, the first heat exchanger channels 12a, the second heat exchanger channels 12b,
First control valve 13a, the second control valve 13b, the 3rd control valve 13c, the 4th control valve 13d, the 5th control valve
13e, the first oil-liquid separator 14, the second oil-liquid separator 15, the first high-pressure pressure sensor 16, the first high-voltage switch gear 17,
Two high-pressure pressure sensors 18, the second high-voltage switch gear 19.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
Air-conditioning system 100 according to embodiments of the present invention is described below with reference to Fig. 1-Fig. 6.
As shown in figure 1, air-conditioning system 100 according to embodiments of the present invention includes the first compressor 1, the first reversing piece 2, the
Two compressors 3, the second reversing piece 4, indoor heat exchanger 5, outdoor heat exchanger 6, first throttle part 7, the first communicating pipe 8a, second connect
Siphunculus 8b, third connecting pipe 8c and the 4th communicating pipe 8d.
First compressor 1 has first row gas port 1a and the first gas returning port 1b, and the first reversing piece 2 has commutation A mouths, commutation
B mouths, commutation C mouths and commutation D mouths, commutation A mouths with commutate B mouths, commutation C mouths in it is one of connect, commutation D mouths with commutate B
Another connection in mouth, commutation C mouths, commutation A mouths are connected with first row gas port 1a, and commutation D mouths are connected with the first gas returning port 1b.
Second compressor 3 has second exhaust port 3a and the second gas returning port 3b, and the second reversing piece 4 has commutation E mouths, commutation F mouths, commutation
G mouths and commutation H mouths, commutation E mouths connect with one of in the F mouths that commutate, commutation G mouths, commutation H mouths with commutation F mouths, commutate G
Another connection in mouthful, commutation E mouths are connected with second exhaust port 3a, and commutation H mouths are connected with the second gas returning port 3b.Indoor heat exchange
The first end of device 5 is connected with commutation F mouths, and the first end of outdoor heat exchanger 6 is connected with commutation C mouths.First throttle part 7 is connected in series
Indoors between the second end of heat exchanger 5 and the second end of outdoor heat exchanger 6.The both ends of first communicating pipe 8a respectively with commutate B
Mouth is connected with commutation G mouths, the first control valve 13a is in series with the first communicating pipe 8a, the both ends of the second communicating pipe 8b are respectively with changing
It is connected to the first end of B mouths with indoor heat exchanger 5, the second control valve 13b, third connecting pipe 8c is in series with the second communicating pipe 8b
Both ends be connected respectively with the first end of outdoor heat exchanger 6 and commutation G mouths, be in series with the 3rd control valve on third connecting pipe 8c
13c, the both ends of the 4th communicating pipe 8d are connected with the first end of outdoor heat exchanger 6 and the second gas returning port 3b respectively, the 4th communicating pipe
The 4th control valve 13d is in series with 8d.
It should be noted that the communication direction for working as the first reversing piece 2 and the second reversing piece 4 is different, and the first control valve
13a, the second control valve 13b, the 3rd control valve 13c and the 4th control valve 13d open and-shut mode are different so that air-conditioning system 100
In different working conditions.Specifically, the air conditioner of the embodiment of the present invention has five kinds of different working methods.
Pattern 1：Two stages of compression heating mode
As shown in Fig. 2 in such a mode, the commutation A mouths of the first reversing piece 2 connect with commutation B mouths, commutation D mouths and commutation C
Mouth connection.The commutation E mouths of second reversing piece 4 connect with commutation F mouths, and commutation H mouths connect with commutation G mouths.At first control valve 13a
In open mode, that is to say, that the commutation B mouths of the first reversing piece 2 are connected with the G mouths of the second reversing piece 4.Second control valve
13b, the 3rd control valve 13c valves and the 4th control valve 13d are closed.Under this pattern, refrigerant is pressed through the first compressor 1
Discharged after contracting by first row gas port 1a, through commutating, A mouths flow into the first reversal valve, and discharging the first reversal valve by the B mouths that commutate enters the
A connecting pipe 8a.Because the first control valve 13a is in open mode, refrigerant flows into the in the first communicating pipe 8a through the G mouths that commutate
Two reversing pieces 4, the second reversing piece 4 is flowed out by the H mouths that commutate and the second compressor 3 is entered by the second gas returning port 3b.Second compression
After machine 3 carries out second-compressed to refrigerant, indoor heat exchanger 5 and outdoor heat exchanger 6 are flowed through by second exhaust port 3a discharges successively, most
Returned to afterwards by the first gas returning port 1b in the first compressor 1.Hereby it is achieved that the refrigerant in air-conditioning system 100 passes through two side compressions
After realize heat-production functions.It should be noted that when outdoor environment is more cold, during single stage compress the compression ratio of compressor compared with
Greatly so that the displacement and efficiency of compressor significantly reduce, and cause the heating capacity deficiency of air-conditioning system 100.The present invention is implemented
The air-conditioning system 100 of example carries out Two-stage Compression when outdoor environment is colder, ensure that the first compressor 1 and the second compressor 3
Compression ratio is all in rational scope, that is to say, that ensure that the displacement and energy efficiency of the first compressor 1 and the second compressor 3
Grade.Simultaneously Two-stage Compression can also improve the compression ratio of whole air-conditioning system 100, ensure that the system of air-conditioning system 100
Cold energy power.
Pattern 2：Single stage compress is double to open heating mode
As shown in figure 3, in such a mode, the commutation A mouths of the first reversing piece 2 connect with commutation B mouths, commutation C mouths and commutation D
Mouth connection, the commutation E mouths of the second reversing piece 4 connect with commutation F mouths, and commutation G mouths connect with commutation H mouths.At second control valve 13b
In open mode, that is to say, that commutation B mouths, the second communicating pipe 8b and the first end phase of indoor heat exchanger 5 of the first reversing piece 2
Connection.Open mode at 4th control valve 13d, that is to say, that the second gas returning port 3b of the second compressor 3, the 4th communicating pipe 8d and
The first end of outdoor heat exchanger 6 is connected.First control valve 13a and the 3rd control valve 13c are in shutoff device.Under this pattern,
A part of refrigerant is being discharged after the compression of the first compressor 1 by first row gas port 1a, and through commutating, A mouths flow into the first reversing piece 2, by
Commutation B mouths entered for the second communicating pipe 8b after discharging the first reversing piece 2, then in turn through indoor heat exchanger 5, outdoor heat exchanger 6
By commutating, C mouths enter the first reversing piece 2, and through commutating, D mouths flow out the first reversing piece 2, finally return to first by the first gas returning port 1b
Compressor 1.Another part refrigerant is being discharged after the compression of the second compressor 3 by second exhaust port 3a, and through commutating, E mouths flow into second
Reversing piece 4, by commutating, F mouths flow out the second reversing piece 4, connect then in turn through indoor heat exchanger 5, outdoor heat exchanger 6 and the 4th
Siphunculus 8d returns to the second compressor 3 by the second gas returning port 3b.Under this pattern, the first compressor 1 and the independent compression of the second compressor 3
It does not interfere with each other, improves the velocity of liquid assets of refrigerant, improves the heating speed of air-conditioning system 100, and due to the first compressor 1
With the independent compression of the second compressor 3, therefore this pattern is not particularly suited for the colder situation of outdoor temperature, and is applied to outdoor temperature
Situation when slightly higher.
Pattern 3：Single stage compress list opens heating mode
As shown in figure 4, the commutation A mouths of the first reversing piece 2 connect with commutation B mouths in such a mode, commutation C mouths and commutation D
Mouth connection, the commutation E mouths of the second reversing piece 4 connect with commutation F mouths, and commutation G mouths connect with commutation H mouths.At second control valve 13b
In open mode, that is to say, that commutation B mouths, the second communicating pipe 8b and the first end phase of indoor heat exchanger 5 of the first reversing piece 2
Connection.First control valve 13a, the 4th control valve 13d and the 3rd control valve 13c are in shutoff device.Under this pattern, refrigerant is passing through
Discharged after the compression of first compressor 1 by first row gas port 1a, through commutating, A mouths flow into the first reversing piece 2, by the B mouths discharge that commutates
Entered for the second communicating pipe 8b after one reversing piece 2, entered then in turn through indoor heat exchanger 5, outdoor heat exchanger 6 by the C mouths that commutate
First reversing piece 2, through commutating, D mouths flow out the first reversing piece 2, finally return to the first compressor 1 by the first gas returning port 1b.Now
Two compressors 3 do not work.Under this pattern, only the first compressor 1 works, and is equally applicable to the slightly higher situation of outdoor temperature
Under, but heating mode is opened compared to double, this pattern more saves.
Pattern 4：Single stage compress is double to open refrigeration mode
As shown in figure 5, in such a mode, the commutation A mouths of the first reversing piece 2 connect with commutation C mouths, commutation B mouths and commutation D
Mouth connection, the commutation E mouths of the second reversing piece 4 connect with commutation G mouths, and commutation F mouths connect with commutation H mouths.At second control valve 13b
In open mode, that is to say, that commutation B mouths, the second communicating pipe 8b and the first end phase of indoor heat exchanger 5 of the first reversing piece 2
Connection.Open mode at 3rd control valve 13c, that is to say, that second exhaust port 3a, the third connecting pipe 8c of the second compressor 3 and
The first end of outdoor heat exchanger 6 is connected.First control valve 13a and the 4th control valve 13d are in shutoff device.Under this pattern,
A part of refrigerant is being discharged after the compression of the first compressor 1 by first row gas port 1a, and through commutating, A mouths flow into the first reversing piece 2, by
After the C mouths that commutate discharge the first reversing piece 2, successively by outdoor heat exchanger 6, indoor heat exchanger 5, the second communicating pipe 8b, through the B that commutates
Mouth enters the first reversing piece 2, and through commutating, D mouths flow out the first reversing piece 2, finally return to the first compressor 1 by the first gas returning port 1b.
Another part refrigerant is being discharged after the compression of the second compressor 3 by second exhaust port 3a, and through commutating, E mouths flow into the second reversing piece 4,
By commutate G mouths flow out the second reversing piece 4, then in turn through third connecting pipe 8c, outdoor heat exchanger 6 and indoor heat exchanger 5 by
Commutation F mouths enter the second reversing piece 4, and the H mouths that enter to commutate discharge the first reversing piece 2, finally return to the second pressure by the second gas returning port 3b
Contracting machine 3.Under this pattern, the first compressor 1 is not interfere with each other with the independent compression of the second compressor 3, improves the velocity of liquid assets of refrigerant,
Improve the refrigerating speed of air-conditioning system 100, and due to the first compressor 1 and the independent compression of the second compressor 3, therefore this mould
Formula is not particularly suited for the higher situation of outdoor temperature, and the situation suitable for outdoor temperature when slightly higher.
Pattern 5：Single stage compress list opens refrigeration mode
As shown in fig. 6, in such a mode, the commutation A mouths of the first reversing piece 2 connect with commutation C mouths, commutation B mouths and commutation D
Mouth connection, the commutation E mouths of the second reversing piece 4 connect with commutation G mouths, and commutation F mouths connect with commutation H mouths.At second control valve 13b
In open mode, that is to say, that commutation B mouths, the second communicating pipe 8b and the first end phase of indoor heat exchanger 5 of the first reversing piece 2
Connection.First control valve 13a, the 3rd control valve 13c and the 4th control valve 13d are in shutoff device.Under this pattern, refrigerant is passing through
Discharged after the compression of first compressor 1 by first row gas port 1a, through commutating, A mouths flow into the first reversing piece 2, by the C mouths discharge that commutates
After one reversing piece 2, successively by outdoor heat exchanger 6, indoor heat exchanger 5, the second communicating pipe 8b, through commutating, B mouths change into first
To part 2, through commutating, D mouths flow out the first reversing piece 2, finally return to the first compressor 1 by the first gas returning port 1b.Under this pattern, only
There is the first compressor 1 to work, be equally applicable to outdoor temperature it is slightly higher in the case of, but open refrigeration mode compared to double, this pattern
More save.
In summary, air-conditioning system 100 according to embodiments of the present invention has Two-stage Compression heating mode, single stage compress double
Open heating mode, single stage compress list opens that heating mode, single stage compress are double to open refrigeration mode and single stage compress list opens refrigeration mode.Cause
This, the air-conditioning system 100 of the embodiment of the present invention, on the premise of two-stage compressor is met, can also realize at general temperature
Single-stage compressor singly open or double parallel operation patterns for driving compressor, not only cause air-conditioning system 100 environment temperature compared with
It can preferably be heated when low, conversion multiple-working mode can also be needed according to varying environment, that is, ensure that air-conditioning system
100 job stability, it in turn ensure that the heat exchange efficiency of air-conditioning system 100.
As shown in figure 1, air-conditioning system 100 also includes reservoir 9 and commutation valve group 10, reservoir 9 in certain embodiments
With import 9a and outlet 9b, the refrigerant that reservoir 9 is configured to flow into from import 9a discharges gas after gas-liquid separation by exporting 9b
State refrigerant.The valve group 10 that commutates has indoor connection end S3, outdoor connection end S4, liquid feeding end S1, outlet side S2, indoor connection end S3
It is connected with indoor heat exchanger 5, outdoor connection end S4 is connected with outdoor heat exchanger 6, and liquid feeding end S1 is connected with import 9a, outlet side S2
It is connected with outlet 9b, commutation valve group 10 is configured to the equal single flow direction of refrigerant from indoor connection end S3 and outdoor connection end S4 inflows
Refrigerant at liquid feeding end S1, outlet side S2 is respectively facing indoor connection end S3 and outdoor connection end S4 one-way flows.Need to illustrate
, reservoir 9 can to refrigerant carry out gas-liquid separation, prevent liquid refrigerants flow into compressor cause compressor occur liquid hammer show
As so as to improve the job stability of air-conditioning system 100.Commutation valve group 10 ensure that air-conditioning system 100 no matter refrigeration or
During heating, refrigerant all enters reservoir 9 from the import 9a of reservoir 9, leaves reservoir 9 by exporting 9b, thus further prevents
Liquid, which flows into compressor, causes compressor that liquid hit phenomenon occurs.
Specifically, as shown in figure 1, commutation valve group 10 includes the first check valve 10a, the second check valve 10b, the 3rd check valve
10c and the 4th check valve 10d；Wherein, the first check valve 10a one end and the second check valve 10b one end is connected in series and phase
Liquid feeding end S1 is formed at even, the first check valve 10a other end is connected with outdoor heat exchanger 6, the second check valve 10b other end
It is connected with indoor heat exchanger 5, the first check valve 10a and the second check valve 10b are configured to the list on the direction towards liquid feeding end S1
To connection；3rd check valve 10c one end and the 4th check valve 10d one end are connected in series and connecting place forms outlet side S2,
The 3rd check valve 10c other end is connected with outdoor heat exchanger 6, the 4th check valve the 10d other end and the phase of indoor heat exchanger 5
Even, the 3rd check valve 10c is configured in unilaterally connected, the 4th check valve 10d on 6 direction from outlet side S2 to outdoor heat exchanger
It is configured in the unilaterally connected on 5 direction from outlet side S2 to indoor heat exchanger.
It should be noted that when air-conditioning system 100 heats, through the second check valve 10b after refrigerant outflow indoor heat exchanger 5
Liquid feeding end S1 is flowed to, reservoir 9 is entered by import 9a, 9b is arranged to outlet from outlet after the gas liquid separating function of reservoir 9
S2 is held, then flows to outdoor heat exchanger 6 through the 3rd check valve 10c.Conversely, when air-conditioning system 100 heats, outside refrigerant delivery chamber
Liquid feeding end S1 is flowed to through the first check valve 10a after switching heat-exchanger, reservoir 9 is entered by import 9a, by the gas-liquid point of reservoir 9
From after effect, from outlet, 9b is arranged to outlet side S2, then flows to indoor heat exchanger 5 through the 4th check valve 10d.In summary, commutate
Valve group 10 ensure that air-conditioning system 100 no matter when freezing or heating, and refrigerant all enters reservoir 9 from liquid feeding end S1, by going out
Gas end S2 leaves reservoir 9, and thus further preventing liquid to flow into compressor causes compressor that liquid hit phenomenon occurs.
Certainly commutation valve group 10, but reservoir 9 are not connected with some embodiments of the invention, on reservoir 9
Liquid feeding end S1 and outlet side S2 be equipped with gas-liquid separator, be thus also possible to prevent liquid flow into compressor cause compressor to be sent out
Raw liquid hit phenomenon.
In certain embodiments, as shown in figure 1, air-conditioning system 100 also includes the second throttling element 11, the second throttling element 11 is gone here and there
Connection is connected between outlet side S2 and the outlet 9b of reservoir 9.
In some optional embodiments, as shown in figure 1, air-conditioning system 100 also includes economizer 12 and for controlling the
5th control valve 13e of cold medium flux in two heat exchanger channels 12b, economizer 12 have the first heat exchanger channels that can mutually exchange heat
12a and the second heat exchanger channels 12b, the first heat exchanger channels 12a are connected in series between outlet 9b and outlet side S2, and the second heat exchange is logical
Road 12b both ends are connected with outlet 9b and the second gas returning port 3b respectively.
Specifically, the 5th control valve 13e is connected in series between outlet 9b and the second heat exchanger channels 12b.
It should be noted that when the 5th control valve 13e is closed, refrigerant directly enters after leaving reservoir 9 from outlet side S2
Enter the first heat exchanger channels 12a, refrigerant realizes supercooling in the first heat exchanger channels 12a, it is possible thereby to further reduce gaseous coolant
Temperature.When air-conditioning system 100 is in refrigerating state, outdoor heat exchanger 6 can be made preferably to absorb heat, improve heating efficiency.
When air-conditioning system 100 is in heating state, 5 more preferable underground heat of indoor heat exchanger can be made, improve refrigerating efficiency.
When the 5th control valve 13e is opened, refrigerant respectively enters the first heat exchanger channels after leaving reservoir 9 from outlet side S2
12a and the second heat exchanger channels 12b, now the refrigerant in the first heat exchanger channels 12a can absorb the second heat exchanger channels 12b refrigerants
Heat.Outdoor heat exchanger 6 is defrosted it is understood that such characteristic can be used in winter.Specifically, it is right
When outdoor heat exchanger 6 is defrosted, air-conditioning system 100 needs to be in refrigerating state, and refrigerant divides after reservoir 9 is flowed out
Stream, a part of refrigerant enters the first heat exchanger channels 12a, indoor heat exchanger 5 is eventually returned in compressor, and another part refrigerant passes through
Second heat exchanger channels 12b is directly returned in compressor, and it is less thus, during defrosting to get in the refrigerant of heat exchanger 5, is reduced
The refrigeration of refrigerant indoors so that indoor temperature is unlikely to too low in defrosting, improves user's usage comfort.
In certain embodiments, as shown in figure 1, air-conditioning system 100 also includes the first oil-liquid separator 14 and the second fluid
Separator 15, the first oil-liquid separator 14 are connected in series between first row gas port 1a and commutation A mouths, the second oil-liquid separator 15
It is connected in series between second exhaust port 3a and commutation E mouths.It is understood that the first oil-liquid separator 14 and the second fluid point
The lubricating oil separation contained in refrigerant can be come out from device 15, which thereby enhance the operating efficiency of air-conditioning system 100.
In certain embodiments, as shown in figure 1, being set on pipeline between first row gas port 1a and the first oil-liquid separator 14
There is the first high-pressure pressure sensor 16, the pipeline between first row gas port 1a and commutation A mouths is provided with the first high-voltage switch gear 17.By
This, can preventing the first compressor 1 from occurring, output pressure is excessive to cause the operation troubles of air-conditioning system 100.It should be noted that work as
The detected value of first high-pressure pressure sensor 16, which reaches threshold values, is, the first high-voltage switch gear 17 will be opened and carry out pressure release.
In certain embodiments, as shown in figure 1, being set on pipeline between second exhaust port 3a and the second oil-liquid separator 15
There is the second high-pressure pressure sensor 18, the pipeline between second exhaust port 3a and commutation A mouths is provided with the second high-voltage switch gear 19.By
This, can preventing the second compressor 3 from occurring, output pressure is excessive to cause the operation troubles of air-conditioning system 100.It should be noted that work as
The detected value of second high-pressure pressure sensor 18, which reaches threshold values, is, the second high-voltage switch gear 19 will be opened and carry out pressure release.
In certain embodiments, the first reversing piece 2 and the second reversing piece 4 are four-way valve.Thus, air-conditioning system is simplified
100 structure, reduces production cost.Certainly, the first reversing piece 2 and the second reversing piece 4 can also be that commutation component can other
Commutation element.
The air-conditioning system 100 of a specific embodiment of the invention is described below with reference to Fig. 1.
As shown in figure 1, the air-conditioning system 100 of the present embodiment includes the first compressor 1, the first reversing piece 2, the second compressor
3, the second reversing piece 4, indoor heat exchanger 5, outdoor heat exchanger 6, first throttle part 7, the first communicating pipe 8a, the second communicating pipe 8b,
Third connecting pipe 8c, the 4th communicating pipe 8d, reservoir 9, commutation valve group 10, the second throttling element 11, economizer 12, the 5th control valve
13e, the first oil-liquid separator 14, the second oil-liquid separator 15, the first high-pressure pressure sensor 16, the first high-voltage switch gear 17,
Two high-pressure pressure sensors 18 and the second high-voltage switch gear 19.
First compressor 1 has first row gas port 1a and the first gas returning port 1b, and the first reversing piece 2 has commutation A mouths, commutation
B mouths, commutation C mouths and commutation D mouths, commutation A mouths with commutate B mouths, commutation C mouths in it is one of connect, commutation D mouths with commutate B
Another connection in mouth, commutation C mouths, commutation A mouths are connected with first row gas port 1a, and commutation D mouths are connected with the first gas returning port 1b.
Second compressor 3 has second exhaust port 3a and the second gas returning port 3b, and the second reversing piece 4 has commutation E mouths, commutation F mouths, commutation
G mouths and commutation H mouths, commutation E mouths connect with one of in the F mouths that commutate, commutation G mouths, commutation H mouths with commutation F mouths, commutate G
Another connection in mouthful, commutation E mouths are connected with second exhaust port 3a, and commutation H mouths are connected with the second gas returning port 3b.
The first end of indoor heat exchanger 5 is connected with commutation F mouths, and the first end of outdoor heat exchanger 6 is connected with commutation C mouths.The
One throttling element 7 is connected in series between the second end of indoor heat exchanger 5 and the second end of outdoor heat exchanger 6.First communicating pipe 8a
Both ends respectively with commutation B mouths and commutate G mouths be connected, the first control valve 13a, the second communicating pipe are in series with the first communicating pipe 8a
First end of the 8b both ends respectively with commutation B mouths and indoor heat exchanger 5 is connected, and the second control valve is in series with the second communicating pipe 8b
13b, third connecting pipe 8c both ends are connected with the first end and commutation G mouths of outdoor heat exchanger 6 respectively, are gone here and there on third connecting pipe 8c
It is associated with the 3rd control valve 13c, the both ends of the 4th communicating pipe 8d first end and the second gas returning port 3b phases with outdoor heat exchanger 6 respectively
Even, it is in series with the 4th control valve 13d on the 4th communicating pipe 8d.
Reservoir 9 has import 9a and outlet 9b, and reservoir 9 is configured to the refrigerant from import 9a inflows after gas-liquid separation
By exporting 9b discharge gaseous coolants.The valve group 10 that commutates has indoor connection end S3, outdoor connection end S4, liquid feeding end S1, outlet side
S2, indoor connection end S3 are connected with indoor heat exchanger 5, and outdoor connection end S4 is connected with outdoor heat exchanger 6, liquid feeding end S1 and import
9a is connected, outlet side S2 be connected with outlet 9b the second throttling element 11 be connected in series in outlet side S2 and reservoir 9 outlet 9b it
Between.
Commutation valve group 10 includes the first check valve 10a, the second check valve 10b, the 3rd check valve 10c and the 4th check valve
10d；Wherein, the first check valve 10a one end and the second check valve 10b one end are connected in series and connecting place forms liquid feeding end
S1, the first check valve 10a other end are connected with outdoor heat exchanger 6, the second check valve 10b other end and indoor heat exchanger 5
It is connected, the first check valve 10a and the second check valve 10b are configured to the unilaterally connected on the direction towards liquid feeding end S1；3rd is single
It is connected in series to one end of valve 10c one end and the 4th check valve 10d and connecting place forms outlet side S2, the 3rd check valve 10c
The other end be connected with outdoor heat exchanger 6, the 4th check valve 10d other end is connected with indoor heat exchanger 5, the 3rd check valve
10c is configured in the unilaterally connected on 6 direction from outlet side S2 to outdoor heat exchanger, and the 4th check valve 10d is configured to from going out
Gas end S2 is to unilaterally connected on the direction of indoor heat exchanger 5.
Economizer 12 has the first heat exchanger channels 12a and the second heat exchanger channels 12b that can mutually exchange heat, the first heat exchanger channels
12a is connected in series between outlet 9b and outlet side S2, and the second heat exchanger channels 12b both ends are respectively with exporting 9b and the second return-air
Mouth 3b is connected.5th control valve 13e is connected in series between outlet 9b and the second heat exchanger channels 12b.
First oil-liquid separator 14 is connected in series between first row gas port 1a and commutation A mouths, the second oil-liquid separator 15
It is connected in series between second exhaust port 3a and commutation E mouths.
Pipeline between first row gas port 1a and the first oil-liquid separator 14 is provided with the first high-pressure pressure sensor 16, the
Pipeline between one exhaust outlet 1a and commutation A mouths is provided with the first high-voltage switch gear 17.Second exhaust port 3a and the separation of the second fluid
Pipeline between device 15 is provided with the second high-pressure pressure sensor 18, is set on the pipeline between second exhaust port 3a and commutation A mouths
There is the second high-voltage switch gear 19.
The air-conditioning system 100 of the present embodiment has Two-stage Compression heating mode, single stage compress are double to open heating mode, single-stage pressure
Contracting singly opens that heating mode, single stage compress are double to open refrigeration mode and single stage compress list opens refrigeration mode.Therefore, the embodiment of the present invention
Air-conditioning system 100, on the premise of two-stage compressor is met, can also realize the single-stage compressor at general temperature singly open or
The double parallel operation patterns for driving compressor of person, not only enable air-conditioning system 100 preferably to be heated when environment temperature is relatively low,
Conversion multiple-working mode can also be needed according to varying environment, that is, ensure that the job stability of air-conditioning system 100, protect again
The heat exchange efficiency of air-conditioning system 100 is demonstrate,proved.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
- A kind of 1. air-conditioning system, it is characterised in that including：First compressor, first compressor have first row gas port and the first gas returning port；First reversing piece, first reversing piece have commutation A mouths, commutation B mouths, commutation C mouths and commutation D mouths, the commutation A mouths Connected with one of in the commutation B mouths, the commutation C mouths, the commutation D mouths and the commutation B mouths, the commutation C Another connection in mouthful, the commutation A mouths are connected with the first row gas port, the commutation D mouths and first gas returning port It is connected；Second compressor, second compressor have second exhaust port and the second gas returning port；Second reversing piece, second reversing piece have commutation E mouths, commutation F mouths, commutation G mouths and commutation H mouths, the commutation E mouths Connected with one of in the commutation F mouths, the commutation G mouths, the commutation H mouths and the commutation F mouths, the commutation G Another connection in mouthful, the commutation E mouths are connected with the second exhaust port, the commutation H mouths and second gas returning port It is connected；Indoor heat exchanger, the first end of the indoor heat exchanger are connected with the commutation F mouths；Outdoor heat exchanger, the first end of the outdoor heat exchanger are connected with the commutation C mouths；First throttle part, the first throttle part are connected in series in the second end of the indoor heat exchanger and the outdoor heat exchanger The second end between；First communicating pipe, the both ends of first communicating pipe are connected with the commutation B mouths and the commutation G mouths respectively, and described The first control valve is in series with a connecting pipe；Second communicating pipe, the both ends of second communicating pipe first end with the commutation B mouths and the indoor heat exchanger respectively It is connected, the second control valve is in series with second communicating pipe；Third connecting pipe, the both ends of the third connecting pipe first end with the outdoor heat exchanger and the commutation G mouths respectively It is connected, the 3rd control valve is in series with the third connecting pipe；4th communicating pipe, the both ends of the 4th communicating pipe first end with the outdoor heat exchanger and second return-air respectively Mouth is connected, and the 4th control valve is in series with the 4th communicating pipe.
- 2. air-conditioning system according to claim 1, it is characterised in that also include：Reservoir, the reservoir have inlet and outlet, and the reservoir configurations are into the refrigerant flowed into from the import through gas Gaseous coolant is discharged by the outlet after liquid separation；Commutate valve group, and the commutation valve group has indoor connection end, outdoor connection end, liquid feeding end, outlet side, the indoor connection End be connected with the indoor heat exchanger, the outdoor connection end is connected with the outdoor heat exchanger, the liquid feeding end with it is described enter Mouthful it is connected, the outlet side is connected with described export, and the reversal valve set constructor is into from the indoor connection end and the outdoor Liquid feeding end described in the equal single flow direction of refrigerant that connection end flows into, the refrigerant at the outlet side are respectively facing the indoor connection end With the outdoor connection end one-way flow.
- 3. air-conditioning system according to claim 2, it is characterised in that also include：Second throttling element, second throttling element It is connected in series between the outlet side and the outlet of the reservoir.
- 4. air-conditioning system according to claim 2, it is characterised in that the commutation valve group includes：First check valve, second Check valve, the 3rd check valve and the 4th check valve；Wherein,One end of first check valve and one end of second check valve are connected in series and connecting place forms the liquid feeding end, The other end of first check valve is connected with the outdoor heat exchanger, and the other end and the interior of second check valve are changed Hot device is connected, and first check valve unidirectionally connects with second check valve structure on the direction towards the liquid feeding end It is logical；One end of 3rd check valve and one end of the 4th check valve are connected in series and connecting place forms the outlet side, The other end of 3rd check valve is connected with the outdoor heat exchanger, and the other end of the 4th check valve changes with the interior Hot device is connected, outlet side described in the 3rd check valve structure Cheng Cong to unilaterally connected on the direction of the outdoor heat exchanger, Outlet side described in the 4th check valve structure Cheng Cong is to unilaterally connected on the direction of the indoor heat exchanger.
- 5. air-conditioning system according to claim 2, it is characterised in that also include：Economizer, the economizer have the first heat exchanger channels and the second heat exchanger channels that can mutually exchange heat, first heat exchange Tandem is connected between the outlet and the outlet side, the both ends of second heat exchanger channels respectively with the outlet and Second gas returning port is connected；For controlling the 5th control valve of cold medium flux in second heat exchanger channels.
- 6. air-conditioning system according to claim 5, it is characterised in that the 5th control valve is connected in series in the outlet Between second heat exchanger channels.
- 7. air-conditioning system according to claim 1, it is characterised in that also include：First oil-liquid separator, first oil-liquid separator be connected in series in the first row gas port and the commutation A mouths it Between；Second oil-liquid separator, second oil-liquid separator be connected in series in the second exhaust port and the commutation E mouths it Between.
- 8. air-conditioning system according to claim 1, it is characterised in that the first row gas port and first fluid separation Pipeline between device is provided with the first high-pressure pressure sensor, on the pipeline between the first row gas port and the commutation A mouths Provided with the first high-voltage switch gear.
- 9. air-conditioning system according to claim 1, it is characterised in that the second exhaust port and second fluid separation Pipeline between device is provided with the second high-pressure pressure sensor, on the pipeline between the second exhaust port and the commutation A mouths Provided with the second high-voltage switch gear.
- 10. air-conditioning system according to claim 1, it is characterised in that first reversing piece and second reversing piece It is four-way valve.
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| CN201711008507.1A CN107763875B (en) | 2017-10-25 | 2017-10-25 | Air conditioning system |
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| CN111707014A (en) * | 2020-07-02 | 2020-09-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Air conditioning system and control method thereof |
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