JP2002031435A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner, which eliminates generation of a refrigerant sound by connecting a bypass passage, constituted of branch passages equipped with an auxiliary balance capillary tube respectively and a connecting passage connecting the branch passages to one passage, between the outlet pipe of an outdoor side heat exchanger upon cooling operation, which consists of a plurality of paths equipped with a balance capillary tube, and a capillary tube. SOLUTION: In the air conditioner, in which the outdoor side heat exchanger 3 consisting of a compressor 1, a four-way valve 2 and a plurality of paths 3a equipped with balance capillary tubes 3c in outlet port pipes 3b at cooling operation, the capillary tube 4 and an indoor side heat exchanger 5 are connected sequentially through a pipeline for circulating non-azeotropic refrigerant (R407C), the bypass passage constituted of the branch passages 3e, equipped respectively with the auxiliary balance capillary tube 3d and the connecting passage 3g connecting the branch passages to one passage, is connected between the outlet port pipes of the plurality of paths and the capillary tube.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly, to an outlet pipe of an outdoor heat exchanger during a cooling operation comprising a plurality of paths having a balance capillary tube, and a capillary tube. The present invention relates to a structure in which a bypass path comprising a branch path provided with each of the auxiliary balance capillary tubes and a connecting path connecting the branch paths to one is connected between the branch paths so that refrigerant noise is not generated.

[0002]

2. Description of the Related Art A conventional air conditioner is, for example, shown in FIG.
As shown in the refrigeration cycle diagram shown in FIG. 3 and the enlarged view of the main part shown in FIG. 2 (B), a plurality of paths 3a having a compressor 1, a four-way valve 2, and a balance capillary tube 3c in an outlet pipe 3b during cooling operation. The outdoor heat exchanger 3, the capillary tube 4, and the indoor heat exchanger 5 are sequentially connected by piping, and circulate a non-azeotropic mixed refrigerant (R407C).

[0003] However, the non-azeotropic mixed refrigerant (R4
07C) is a mixture of three kinds of refrigerants having different boiling points from R32, R125 and R124a, and after passing through a plurality of paths 3a of the outdoor heat exchanger 3, the gaseous phase and the liquid phase Is mixed, so that in the balance capillary tube 3c provided to allow the refrigerant to pass through the plurality of paths 3a in a well-balanced manner, a problem that loud refrigerant noise is generated with passage of the refrigerant. Had.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, in the present invention, an outlet pipe of an outdoor heat exchanger and a capillary tube during a cooling operation comprising a plurality of paths having a balance capillary tube are provided. To provide an air conditioner in which a bypass path including a branch path provided with an auxiliary balance capillary tube and a connecting path connecting the branch paths together is connected to prevent refrigerant noise from being generated. With the goal.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an outdoor heat exchange system comprising a compressor, a four-way valve, and a plurality of paths having a balance capillary tube at an outlet pipe during a cooling operation. Vessel, capillary tube,
In an air conditioner in which a non-azeotropic mixed refrigerant (R407C) is circulated by sequentially connecting a pipe to an indoor side heat exchanger, an auxiliary balance capillary tube is provided between outlet pipes of the plurality of paths and the capillary tube. , And a bypass path comprising a connecting path connecting the branch paths together.

Further, the balance capillary tubes are respectively connected so as to circulate the gas phase refrigerant in the outlet pipe, and the branch paths are respectively connected so as to guide the liquid phase refrigerant in the outlet pipes of the plurality of paths. It has a connected configuration.

Further, the gas-phase refrigerant passing through the balance capillary tube is recirculated to the outdoor heat exchanger.

Further, the gas-phase refrigerant passing through the balance capillary tube is caused to flow to a lower portion of the outdoor heat exchanger.

Further, a check valve which opens toward the capillary tube is provided in the connection path.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below as examples based on the attached drawings. FIG. 1 is an explanatory view of an air conditioner according to the present invention, in which (A) is a refrigeration cycle diagram, (B) is an enlarged view of a main part of the refrigeration cycle, and (C) is an enlarged view of a portion A shown in (B). .

In the drawing, 1 is a compressor, 2 is a four-way valve, 3
Consists of a plurality of paths 3a, an outdoor heat exchanger provided with a balance capillary tube 3c at the outlet pipe 3b during the cooling operation of the plurality of paths 3a, 4 is a capillary tube, 5 is an indoor heat exchanger, and Are sequentially connected to form a refrigeration cycle, and form a refrigerant circuit indicated by a solid arrow during cooling operation and a refrigerant circuit indicated by a broken arrow during heating operation.

In the above-described basic configuration, the outlet pipe 3b of the outdoor heat exchanger 3 during the cooling operation comprising a plurality of paths 3a provided with the balance capillary tube 3c.
And a bypass path comprising a branch path 3e provided with an auxiliary balance capillary tube 3d and a connection path 3g connecting the branch path 3e to one another, between the capillary tube 4 and the capillary tube 4, so that refrigerant noise is generated. The structure that does not occur will be described below.

[0013] Between the outlet tube 3b and the capillary tube 4 during the cooling operation of the plurality of paths 3a, the
As shown in (A) and FIG. 1 (B), the auxiliary balance capillary tube 3d is connected to the balance capillary tube.
A bypass comprising a branch path 3e provided in parallel with each of the pipes 3c and a connection path 3g provided with a check valve 6 connecting the branch path 3e into one and opening toward the capillary tube 4 side. 1C, the balance capillary tubes 3c are connected to circulate the gaseous refrigerant in the outlet pipe 3b, respectively, while the branch path 3e is Are connected to each other so as to guide the liquid-phase refrigerant in the outlet pipe 3b of the path 3a of FIG.
In the gas-liquid mixed refrigerant flowing out to the outlet pipe 3b as shown by the arrow a, the liquid-phase refrigerant flows below the gas-phase refrigerant under the influence of gravity. The gas phase refrigerant passes through the balance capillary tube 3c provided in the upper branch path 3e, as indicated by an arrow c, and the auxiliary balance capillary tube 3d provided in the lower branch path 3e. Therefore, unlike the above-described problem in the related art, it is not necessary to generate a loud refrigerant noise in the balance capillary tube 3c with the passage of the refrigerant.

Further, the balance capillary tube 3c
1A and FIG. 1B, the gaseous refrigerant that has passed through the lower circuit 3f of the outdoor heat exchanger 3 is again circulated as shown in FIGS. The heat exchange efficiency can be improved by flowing the heat again to the outdoor heat exchanger 3 for heat exchange.

Further, by providing the check valve 6 which opens toward the capillary tube 4 side in the connection path 3g, all of the refrigerant flows to the lower circuit 3f during the heating operation at a low outside temperature. By circulating the hot-air bypass, the outdoor heat exchanger 3 can be effectively prevented from forming ice.

With the above configuration, FIGS.
As shown in (C), between the outlet pipe 3b and the capillary tube 4 during the cooling operation of the plurality of paths 3a,
A branch path 3e provided with each of the auxiliary balance capillary tubes 3d, and a connection path provided with a check valve 6 that connects the branch path 3e into one and opens toward the capillary tube 4 side;
3g, the balance capillary tube 3c is connected to circulate the gas phase refrigerant in the outlet pipe 3b, respectively, while the branch path 3e is connected to the outlet of the plurality of paths 3a. The liquid-phase refrigerant in the pipe 3b is connected to each other so as to guide the liquid-phase refrigerant. , The liquid-phase refrigerant indicated by the arrow b
Since the gaseous refrigerant indicated by the arrow c in the auxiliary balance capillary tube 3d provided in the lower branch path 3e passes through the balance capillary tube 3c provided in the upper branch path 3e, respectively. As described above, the air conditioner does not generate a loud refrigerant noise in the balance capillary tube 3c due to the passage of the refrigerant as in the problem of the related art described above.

[0017]

As described above, according to the present invention, the auxiliary balance capillary tube is provided between the outlet tube of the outdoor heat exchanger and the capillary tube during the cooling operation consisting of a plurality of passes having the balance capillary tube. Are connected to a bypass path including a branch path including the branch paths and a connecting path connecting the branch paths into one, so that refrigerant noise is not generated.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an air conditioner according to the present invention, wherein (A) is a refrigeration cycle diagram, (B) is an enlarged view of a main part of the refrigeration cycle, and (C) is an A portion shown in (B). FIG.

FIG. 2 is an explanatory view of an air conditioner according to a conventional example, in which (A) is a refrigeration cycle diagram and (B) is an enlarged view of a main part of the refrigeration cycle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Four-way valve 3 Outdoor heat exchanger 3a Multiple paths 3b Outlet pipe 3c Balance capillary tube 3d Auxiliary balance capillary tube 3e Branch path 3f Lower circuit 3g Connection path 4 Capillary tube 5 Indoor heat exchanger 6 Check valve

Claims (5)

[Claims] 1. A compressor, a four-way valve, an outdoor heat exchanger comprising a plurality of paths having a balance capillary tube at an outlet pipe during a cooling operation, a capillary tube, and an indoor heat exchanger. In an air conditioner connected by piping and circulating a non-azeotropic mixed refrigerant (R407C), a branch path provided with an auxiliary balance capillary tube between an outlet pipe of the plurality of paths and the capillary tube; An air conditioner characterized by connecting a bypass path comprising a connecting path connecting the branch paths together. 2. The balance capillary tubes are respectively connected to circulate a gaseous refrigerant in the outlet pipe, and the branch paths are respectively connected to guide a liquid-phase refrigerant in outlet pipes of the plurality of paths. The air conditioner according to claim 1, wherein the air conditioner is connected. 3. The air conditioner according to claim 1, wherein the gas-phase refrigerant that has passed through the balance capillary tube is recirculated to the outdoor heat exchanger. 4. The air conditioner according to claim 3, wherein the gas-phase refrigerant that has passed through the balance capillary tube is circulated to a lower portion of the outdoor heat exchanger. 5. The air conditioner according to claim 1, wherein a check valve that opens toward the capillary tube is provided in the connection path.