CN100523660C - Air conditioner - Google Patents

With reference to figure 1, concurrent heating/cooling multi type air-conditioner comprises:

10,

20 and a plurality of

30a, 30b and 30c in each chamber.

10 comprises: compressor 11;

12; Be positioned at the outdoor fan of outdoor heat converter one side;

15 is used to change that compressed refrigerant from compressor 11 flow to outdoor heat converter or to distributor, this correctly selects according to mode of operation; Gatherer 14 with on the refrigerant tubing that is positioned at the suction side that is connected to compressor is used for isolating vapor phase refrigerant from liquid phase refrigerant.

10 is connected with

20 via following three pipelines by reversing arrangement, these three pipelines are: be used for and will be directed to

21 of distributor through

12 from the high-pressure refrigerant of compressor 11, be used for directly to be directed to

22 of

20 from the cold-producing medium of compressor 11, and be connected the

23 between the suction side of

20 and compressor 11.

Each of

30a, 30b and 30c comprises

31a, 31b or 31c and

32a, 32b or 32c, and

32a, 32b or 32c are used for making under refrigerating mode the cold-producing medium that imports indoor heat converter into to expand into predetermined state.

20 designs in the following manner, if indoor units is operated under the refrigerating mode, will directly be directed to

32a, 32b or the 32c of indoor units from the cold-producing medium of off-

10; If indoor units is operated under the heating mode, will directly be directed to

31a, 31b or the 31c of indoor units from the cold-producing medium of off-

10.

About this aspect,

20 comprises: with the as many first cold-producing medium lateral 21a of the quantity of indoor units, 21b and 21c, 21 branches come out from first refrigerant tubing, and are connected with 32c with indoor

32a, 32b respectively; The second cold-producing medium lateral 22a, 22b and 22c come out from the second refrigerant tubing branch, and are connected with 31c with

31a, 31b respectively; And the 3rd cold-producing medium lateral 23a, 23 and 23c, 23 branches come out from the 3rd refrigerant tubing, and are connected with 31c with

31a, 31b respectively.The second cold-producing medium lateral 22a, 22b and 22c have the first electronics shut-off

26a, 26b and 26c respectively, and the 3rd cold-producing medium lateral 23a, 23 and 23c have the second electronics shut-off

27a, 27b and 27c respectively.

According to said system, when indoor units is operated in heating mode following time, the first electronics shut-off valve that is positioned on the second cold-producing medium lateral that is connected to indoor units is opened, and the second electronics shut-off valve that is positioned on the 3rd cold-producing medium lateral that is connected to indoor units cuts out, and feasible cold-producing medium from compressor 11 flows to indoor heat converter through

22 and the second cold-producing medium lateral that is connected to indoor units.When indoor units is operated in refrigerating mode following time, be positioned at be operated in refrigerating mode under the second cold-producing medium lateral that is connected of indoor units on the first electronics shut-off valve close, and the second electronics shut-off valve that is positioned on the 3rd cold-producing medium lateral that is connected to indoor units is opened, and the feasible cold-producing medium of having introduced by the first cold-producing medium lateral that is connected with indoor units and having expanded at indoor units expansion gear place imports in the

23 with the 3rd cold-producing medium lateral that is connected with indoor units through the indoor heat converter of indoor units.

And

20 comprises: be connected the

25 between

22 and the

23; Be transformed into the

25a of low pressure refrigerant with the high-pressure refrigerant that on bypass duct, is used for to be stuck in second refrigerant tubing, 22 places, under all indoor units all are operated in situation under the refrigerating mode, be used to prevent because the stagnation of high-pressure refrigerant causes cold-producing medium liquefaction.

Simultaneously, concurrent heating/cooling multi type air-conditioner also comprises the

100 that is positioned on

21, and it is connected between

12 and the

20.

Supercooling

100 makes the cold-producing medium by the heat exchanging process at outdoor heat converter place descend cold in isobaric condition, and be directed to distributor, promptly, part of refrigerant from

12 is expanded, the cold-producing medium that has expanded with flow out from outdoor heat converter, flow to the residual refrigerant generation heat exchange of

20 along

21, and import in the

23 between the suction side that is connected

20 and compressor 11.The back describes

100 in detail with reference to figure 3～5.

Except said system, preferably,

20 also comprises the

24 that is engaged in the coaxitron between the

20 and first refrigerant tubing 21.The cold-producing medium that

24 is guaranteed to import among

31a, 31b and the 31c by the mode of heat exchange between the cold-producing medium is cold excessively.

This cooling selectivity multi type air-conditioner comprises:

50,

60 and a plurality of

70a, 70b and 70c in each chamber are used to make all indoor units to be operated under refrigerating mode or the heating mode.

50 comprises:

51;

52; Be positioned at the

53 of outdoor heat converter one side;

55 is used to change that compressed refrigerant from

51 flow to outdoor heat converter or to distributor, this correctly selects according to mode of operation; Gatherer 54 with on the refrigerant tubing that is positioned at the suction side that is connected to

51 is used for isolating vapor phase refrigerant from liquid phase refrigerant.

50 is connected with

60 via following three pipelines by reversing

55, and these three pipelines are: be used for and will be directed to

61 of distributor through

52 from the high-pressure refrigerant of

51;

62 with end that links to each other with the refrigerant tubing of the outflow end that is connected to

51, be used for and directly be directed to

60 from the cold-producing medium of

51, and be connected the

63 between the suction side of

60 and

51.

Each of indoor units comprises

71a, 71b or 71c and

72a, 72b or 72c, and

72a, 72b or 72c are used for making under refrigerating mode the cold-producing medium that imports indoor heat converter into to expand into predetermined state.

60 designs in the following manner, if all

70a, 70b and 70c are operated under the refrigerating mode, will directly be directed to

72a, 72b or the 72c of indoor units from the cold-producing medium of

61; If all

70a, 70b and 70c are operated under the heating mode, will directly be directed to

71a, 71b or the 71c of indoor units from the cold-producing medium of

62.

About this aspect,

60 comprises: with the as many first cold-producing medium lateral 61a of the quantity of

70a, 70b and 70c, 61b and 61c, 61 branches come out from first refrigerant tubing, and are connected with 72c with indoor

72a, 72b respectively; The second cold-producing medium lateral 62a, 62b and 62c, 62 branches come out from second refrigerant tubing, and are connected with 71c with

71a, the 71b of indoor units respectively; And an electronics shut-off

64, be positioned at

62 and be branched off into position before the second cold-producing medium lateral.The

63 is connected with the other end of

62.

According to said system, as all

70a, 70b and 70c are operated in refrigerating mode following time, the electronics shut-off

64 that is positioned on the second cold-producing medium lateral 62 cuts out, feasible cold-producing medium from

51 is connected to

61 and

70a by reversing

55 processes, the first cold-producing medium lateral 61a of 70b and 70c, 61b and 61c flow to

72a, 72b and 72c, and at

72a, expand in 72b and 72c place, and through

71a, 71b and 71c, the second cold-producing medium lateral 62a, 62b and 62c, and the

63 is drawn in the

51.

As all

70a, 70b and 70c are operated in heating mode following time, the electronics shut-off

64 that is positioned at the second cold-producing

62 is opened, feasible cold-producing medium from

51 passes through reversing

55 process and second

62 and

70a, the second cold-producing medium lateral 62a that 70b is connected with 70c, 62b and 62c flow to

71a, 71b and 71c, and at

71a, heat exchange takes place in 71b and 71c place, and through

72a, 72b and 72c, the first cold-producing

61a, 61b and 61c, and first

61 is drawn in the

51.

Simultaneously, heating/cooling selectivity multi type air-conditioner also comprises the

100 that is positioned on first

61, and it is connected between

52 and the

60.

100 makes the cold-producing medium by the heat exchanging process at

52 places descend cold in isobaric condition, and lead to distributor, promptly, part of refrigerant from

52 is expanded, the cold-producing medium that has expanded with flow out from outdoor heat converter, flow to the residual refrigerant generation heat exchange of

60 along first

61, and import in the 3rd

63 between the suction side that is connected

60 and

51.

Describe supercooling

100 systems in detail below with reference to Fig. 3～5, it is applied to concurrent or selectivity heating/cooling multi type air-conditioner.

100 comprised cool-heat-

110,

120 and extremely crossed the connecting pipe of cool-heat-exchanger.

In more detail, supercooling

100 comprises: cross cool-heat-

110, be used for the part of swell refrigeration agent and remain heat exchange between the not swell refrigeration agent part; First connecting

131 has the

120 of the part cold-producing medium of the heat exchanging process by the outdoor heat converter place that is used to expand, and is connected to first

21 or 61, is used for swell refrigeration agent was directed to cool-heat-

110;

132 is used for swell refrigeration agent not was directed to cool-heat-

110; The 3rd connecting

133 is used for and will has passed through heat exchange and cross not swell refrigeration agent directed

20 or 60 after cold crossing cool-heat-

110 places; And the 4th connecting

134, the 3rd refrigerant tubing that the swell refrigeration agent guiding that is used for passing through after cool-heat-exchanger and the heat exchange is connected with the suction side of

11 or 51.

Cross cool-heat-

110 and have flow passage, it is designed to the cold-producing medium of mulitpath introducing from

12 or 52.About this respect, preferably, cross cool-heat-

110 and comprise:

111, have an end that is connected with second connecting

132, with the other end that is connected with the 3rd connecting

133, be used for the high temperature refrigerant that do not expand that flows; And

112, have an end that is connected with first connecting

131, with the other end that is connected with the 4th connecting

134, be used for carrying out heat exchange with

111, and the low temperature swell refrigeration agent of flowing.

Preferably, cross cool-heat-

110 and have dual pipeline configuration: interior flow duct and at the outer mobile pipeline in the interior flow duct outside is used to improve the heat exchanger effectiveness of cold-producing medium.

In the present invention, preferably, interior flow duct is

112, with the outer pipeline that flows be

111, be used at the

112 mobile low-temperature refrigerants that expanded, flow in the

111 outside from

12 or 52 high temperature refrigerants of discharging, to prevent on the surface of crossing cool-heat-

110, forming dew.Certainly, clearly, the interior flow duct that the outer mobile pipeline of mistake cool-heat-

110 can be connected to first connecting

131 and mistake cool-heat-

110 can be connected to second connecting pipe 132.Yet, in this case, because therefore the cold-producing medium of the lower temperature that flowing in the flow duct outside forms dew easily on the surface of crossing cool-heat-

110.

Cross the variation that cool-heat-

110 can have structure, as long as this structure makes two

111 contact with 112.As an example, cross cool-heat-exchanger and can have the structure of second flow duct being twined several times first flow duct.And preferably, two

111 and 112 are made by the material with thermal conductive resin.

In order to prevent that liquid refrigerant from entering compressor, preferably, the 4th connecting

134 is connected to the 3rd

23 that links to each other with the inlet of

14 or 54 and 63 precalculated position.

Certainly, obviously the 4th connecting

134 can be connected to

11 or 51 and

14 or 54 between the 3rd refrigerant tubing 23.Because cold-producing medium expand into gaseous state in fact, even cold-producing

11 or 51 into, also can not damage the stability of

11 or 51 very bigly.

Preferably, first to fourth pipeline 131,132,133 and 134 was connected to cool-heat-

110, make that the flow direction of mobile high temperature refrigerant is opposite with the flow direction of low temperature swell refrigeration agent in

111, be used to strengthen heat exchanger effectiveness.Certainly, the design condition that depended on cool-heat-

100, possiblely be, first to fourth pipeline 131,132,133 and 134 was connected to cool-heat-

110, made that the flow direction of mobile high temperature refrigerant is identical with the flow direction of low temperature swell refrigeration agent in

111.

Preferably, the interior flow duct of crossing cool-heat-exchanger has

113a or 113b, is used to increase heat exchange area.

In more detail,

113a or 113b are from interior flow duct (second flow duct 112) inwardly protruding, the flow resistance that is used to prevent the cold-producing medium that flows along

111 increases, and increases the heat exchange area of the cold-producing medium of

112 of flowing through.

Certainly,

113a or 113b can all be formed on the inside/outside wall of interior flow duct, or all are formed on the inner/outer of interior flow duct, and are formed on the inwall of the outer pipeline that flows.

113a or 113b can be formed on the inner wall surface of interior flow duct, be ring, perhaps as shown in Figure 4, present spiral form along flow direction along circumferencial direction, perhaps as shown in Figure 5, present form tiny and that extend along the flow direction of cold-producing medium.These structures can increase the thermal efficiency of cold-producing medium, reduce the flow resistance of swell refrigeration agent simultaneously.

The above-mentioned form of

113a or 113b only is some embodiment, and obviously, can there be many variations in

113a or 113b.

Preferably, the hot device for cooling 100 with cool-heat-

110 is installed in the inside of

10 or 50.In more detail, first

21 between

100 and

12 or 52 or 61 length are done shortlyer, feasible cold-producing medium heat exchange from

12 or 52, be used for preventing cold-producing medium demi-inflation at first

21, and sub-cooled liquid refrigerant is supplied to

20, is used to minimize the pressure of cold-producing medium at first

21 or 61 places and descends.

Preferably, cross the length that cool-heat-

110 has 1～2.5m, be used for

120 places on first connecting

131 low-temperature refrigerant that expands and the not swell refrigeration agent of flowing through second connecting pipe in enough heat exchanges of crossing cool-heat-

110 places.

Since offer concurrent heating/cooling multi type air-conditioner and offer selectivity heating/cooling multi type air-

100 operation much at one, below with reference to concurrent heating/cooling multi type air-conditioner operating principle of the present invention is described, in most air-conditioners,

30b and 30c are under the refrigerating mode, in the minority air-conditioner,

30a is under the heating mode.

At first, when concurrent heating/when the cooling multi type air-conditioner entered in the work, cold-producing medium was compressed to high pressure and discharges from compressor at compressor 11 places, import

12 into by reversing arrangement 15.When

13 rotations, high-pressure refrigerant and outdoor air heat exchange and condensation are discharged into first

21 that is connected with supercooling

100 then.

A part of importing the cold-producing medium in the

100 along first

21 into expand into low-temperature refrigerant by the

120 on first connecting

131, and flow through

112, and import

111 into by second connecting

132 along the remainder that first

21 imports the cold-producing medium in the

100 into, so that heat exchange mutually makes the cold-producing medium that flows through

111 descend cold at isopiestic state.

Then, cold-producing medium from

111 of crossing cool-heat-

110

20 through the 3rd connecting

133 and first

21 into unswollen state, be imported into

30b and 30c through the first cold-producing medium lateral 21b and the 21c that is connected with the indoor units of under refrigerating mode, working,, and drawn in the compressor 11 cooling off each chamber by expansion process and heat exchanging process through the 3rd cold-producing medium lateral 23b and 23c, the 3rd

23 and

14.

Cold-producing medium from

112 of crossing cool-heat-

110 is imported in the

14 by the guiding of the 4th connecting

134 and the 3rd connecting

23, is separated into gaseous refrigerant and liquid refrigerant, and is drawn in the compressor 11.

Simultaneously, part of refrigerant from compressor 11 is not directly imported in the

20 by outdoor heat converter, through be operated in heating mode under the second cold-producing medium lateral 22a that is connected of

30a imported into

30a, by heat exchanging process with heating clamber, and through be operated in heating mode under the first cold-producing medium lateral 21a that is connected of indoor units, combine with the cold-producing medium that flows through first refrigerant tubing.

1. air-conditioner comprises:

Be installed in an outdoor outdoor unit, have a compressor and an outdoor heat converter;

Be installed in an indoor indoor units, have an indoor heat converter;

One distributor, being used to adapt to condition of work will be directed to indoor units from the cold-producing medium of off-premises station group, and will be directed to outdoor unit once more by the cold-producing medium of indoor units; With

One supercooling apparatus, it is cold to be used to make cold-producing medium through the heat exchanging process at outdoor heat converter place to descend in isobaric condition, and will cross cold cold-producing medium and be directed to distributor;

This supercooling apparatus comprises: one crosses cool-heat-exchanger, this is crossed cool-heat-exchanger and has double-sleeve structure, the heat exchange section that is used to increase heat exchange area is positioned at inner tube wall, this supercooling apparatus makes the part by the cold-producing medium of the heat exchanging process at outdoor heat converter place expand, and make cold-producing medium dilation with remain not swell refrigeration agent and carry out heat exchange.

2. air-conditioner as claimed in claim 1, wherein this supercooling apparatus also comprises:

One first connecting pipe has the expansion gear of a part of the cold-producing medium of the heat exchanging process by the outdoor heat converter place that is used to expand, is used for swell refrigeration agent was directed to cool-heat-exchanger,

One second connecting pipe is used to guide not swell refrigeration agent and extremely crosses cool-heat-exchanger,

One the 3rd connecting pipe, be used to guide the not swell refrigeration agent of having passed through cool-heat-exchanger to distributor and

One the 4th connecting pipe is used to guide the agent of swell refrigeration of having passed through cool-heat-exchanger to the refrigerant tubing that is connected with the suction side of compressor.

3. air-conditioner as claimed in claim 2, wherein be somebody's turn to do cool-heat-exchanger and comprised:

One first flow duct, the one end is connected to second connecting pipe, and the other end is connected to the 3rd connecting pipe, be used for not swell refrigeration agent flow and

One second flow duct, the one end is connected to first connecting pipe, and the other end is connected to the 4th connecting pipe, is used for carrying out heat exchange and flowing of swell refrigeration agent with first flow duct.

4. air-conditioner as claimed in claim 3, wherein this second flow duct longitudinally is arranged on the inside of first flow duct.

5. air-conditioner as claimed in claim 4, the flow direction of cold-producing medium that wherein flows through second flow duct is opposite with the flow direction of the cold-producing medium that flows through first flow duct.

6. air-conditioner as claimed in claim 4, the flow direction of cold-producing medium that wherein flows through second flow duct is identical with the flow direction of the cold-producing medium that flows through first flow duct.

7. air-conditioner as claimed in claim 3, wherein first flow duct longitudinally is arranged on the inside of second flow duct.

8. air-conditioner as claimed in claim 3 is wherein crossed cool-heat-exchanger and is had the length of 1m～2.5m.

9. air-conditioner as claimed in claim 3, wherein heat exchange section is from the inwall inwardly protruding of interior flow duct.

10. air-conditioner as claimed in claim 9, wherein heat exchange section along the circumferential direction is provided with on the inwall of interior flow duct.

11. air-conditioner as claimed in claim 9, wherein heat exchange section is arranged on the inwall of interior flow duct along the flow direction of cold-producing medium.

12. air-conditioner as claimed in claim 9, wherein heat exchange section is arranged on the inwall of interior flow duct with spirality.

13. air-conditioner as claimed in claim 2, wherein expansion gear is an electronic expansion device.

14. air-conditioner as claimed in claim 2 wherein also comprises the gatherer on the refrigerant tubing that is positioned at the suction side that is connected to compressor, is used for isolating gaseous refrigerant from liquid refrigerant.

15. air-conditioner as claimed in claim 14, wherein the 4th connecting pipe is connected to the refrigerant tubing that links to each other with the refrigerant inlet of gatherer.

16. air-conditioner as claimed in claim 1, wherein supercooling apparatus is arranged on the pre-position of the inside of outdoor unit.

17. air-conditioner as claimed in claim 1, wherein outdoor unit also comprises a reversing arrangement, and being used to adapt to condition of work will optionally be converted to outdoor heat converter or distributor from the flow direction of the cold-producing medium of compressor.

18. air-conditioner as claimed in claim 2 wherein also comprises the auxiliary supercooling apparatus of coaxitron structure, guarantees that the cold-producing medium that imports into the indoor heat converter from supercooling apparatus is cold excessively.