JPH10253196A - Refrigerant distributor of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a distributor, and prevent erroneous assembling upon assembling work from being produced by installing a conical orifice in a refrigerant piping located at an inlet side of the distributor. SOLUTION: Upon assembling of a distributor a conical orifice 10 is inserted into a refrigerant piping 15 located on the side of insertion of the distributor. The conical orifice is adapted such that an outer diameter A on an inlet side is taken as a small diameter part 16 which is made smaller than an inner diameter C of the distributor refrigerant piping 15, and an outer diameter B on an outlet side is made larger than the inner diameter C of the distributor insertion side refrigerant piping 15 to form a flange part 17. Hereby, the conical orifice 10 is inserted into the piping 15 from the small diameter part 16 thereof to prevent erroneous assembling from being performed upon assembling work of the distributor. Then, the distributor insertion side refrigerant piping 15 is inserted into a distributor body 8, and an outer periphery is brazed and is welded, and further each distribution pipe 14 is inserted into a distribution hole 13 in the distributor body 8, and each distribution pipe 14 is brazed to be welded.

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 a refrigerant distributor.

[0002]

2. Description of the Related Art FIG. 6 and FIG.
FIG. 8 is a circuit diagram of a distributor and a refrigerant circuit of the conventional air conditioner disclosed in Japanese Patent Publication No. In the figure, 1 is a compressor, 2 is an outdoor heat exchanger, 3 is a depressurizing capillary, 4 is a distributor, 5 is an indoor heat exchanger, 6 is an accumulator, and 7 is a refrigerant pipe. Outdoor heat exchanger 2, capillary tube for decompression 3, distributor 4,
The indoor heat exchanger 5 and the accumulator 6 are sequentially connected and connected by a refrigerant pipe 7 to form a refrigerant circuit. Reference numeral 8 denotes a main body of the distributor 4, which forms a gas-liquid mixing chamber 9. Reference numeral 10 denotes a conical orifice, and a flat plate orifice 11 is provided on the gas-liquid mixing section 9 side. Reference numeral 12 denotes a fine-graining means such as a wire mesh that partitions the gas-liquid mixing section 9 into a first gas-liquid mixing chamber 9a and a second gas-liquid mixing chamber 9b. Reference numeral 13 denotes a plurality of distribution holes which are provided so as to communicate with the second gas-liquid mixing chamber 9b. Reference numeral 14 denotes a distribution pipe inserted into the distribution hole.

Next, the operation will be described. First, the high-temperature and high-pressure gas refrigerant compressed and discharged by the compressor 1 is condensed by exchanging heat with outdoor air while passing through the outdoor heat exchanger 2 to become a high-pressure liquid refrigerant. Next, the decompression capillary 3
, Rapidly decompresses and expands into a low-pressure gas-liquid two-phase refrigerant in the process of passing through, and is distributed by the distributor 4 and the distribution pipe 14 and sent to the respective refrigerant passages of the indoor unit heat exchanger 5 to exchange heat with indoor air. By doing so, it evaporates and becomes a low-pressure gas refrigerant. This low-pressure gas refrigerant passes through an accumulator 6 and is supplied to the compressor 1.
To form a refrigerant channel that repeats the same operation as described above.

[0004] The distributor 4 in the refrigerant flow path first contracts the flow through the conical orifice 10 in order to evenly distribute the low-pressure gas-liquid two-phase refrigerant, and then discharges the gas-liquid two-phase refrigerant to the gas-liquid mixing section 9. Distribute pipe 1 by uniformly mixing the gas part and liquid part of the two-phase refrigerant
4 and distribute evenly.

Next, a gas-liquid two-phase refrigerant flows from the refrigerant pipe 7 into the conical orifice 10 in the distributor body 8. The conical orifice prevents a sudden pressure drop by gradually increasing the flow rate of the gas-liquid two-phase refrigerant. A flat orifice 1 is provided at the outlet of the conical orifice 10.
Here, the flow rate is set to the maximum value, and the difference between the flow rates of the gas part and the liquid part of the gas-liquid two-phase refrigerant is set to the minimum value, and is sent to the first gas-liquid mixing chamber 9a to diffuse the gas-liquid. Mix. Further, the distribution refrigerant liquid which has been further refined by the granulation means 12 is distributed from the second gas-liquid mixing chamber 9b through the distribution hole 13.

[0006]

Since the distributor of the conventional air conditioner is constructed as described above, a conical orifice, which is a contraction portion whose cross-sectional area is gradually reduced, is provided inside the distributor body. Due to the provision, there was a problem that the distributor became large.

Further, since the conical orifice can be inserted into the distributor body in the reverse direction, there is a problem that the assembly procedure is not erroneously performed at the time of assembling and does not function as a refrigerant circuit. .

SUMMARY OF THE INVENTION An object of the present invention is to reduce the size of the distributor and to prevent the dispenser from being assembled in an incorrect direction during mass production in order to solve the above-mentioned problems.

[0009]

The distributor of the air conditioner according to the present invention is provided between the above-mentioned decompression device and the upper evaporator of a refrigerant circuit having a compressor, a condenser, a decompression device and an evaporator. The conical orifice that increases the flow of the contracted refrigerant, the cross-sectional area of which gradually decreases in the direction of the flow of the refrigerant from the inlet, the gas-liquid two-phase refrigerant that has been accelerated by the conical orifice is mixed, and the refrigerant is mixed. In the distributor having a distribution hole to which a distribution pipe for distributing the refrigerant is connected, a conical orifice for increasing the flow of the refrigerant is inserted and disposed inside the refrigerant pipe on the inlet side of the distributor.

[0010] The distributor of the air conditioner of the present invention includes:
The end of the conical orifice whose cross-sectional area gradually decreases is provided to be larger than the inner diameter of the inlet refrigerant pipe of the distributor, and is used as a flange, and the other end is provided to be smaller than the inner diameter of the refrigerant pipe.

Further, the distributor of the air conditioner of the present invention comprises:
The fact that a conical orifice with a longer cross section that reduces the cross-sectional area was inserted into the refrigerant pipe

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, Embodiment 1 of the present invention will be described. 1 is a side sectional view showing a distributor of an air conditioner according to Embodiment 1 of the present invention, FIG. 2 is an exploded view of FIG. 1, and FIG. 3 is an enlarged view of a conical orifice. The conical orifice has an orifice outside diameter A smaller than an inner diameter C of the distributor refrigerant pipe 15 and a conical orifice formed as a small-diameter portion 16 having a smaller cross-sectional area. The outer diameter B of the orifice at the outlet of the type orifice is larger than the inner diameter C of the refrigerant pipe 15 on the insertion side of the distributor to form the flange portion 17.

Next, the order of assembling the distributors will be described. First, the conical orifice 10 is inserted into the distributor insertion side refrigerant pipe 15. At this time, the outlet side of the conical orifice 10 has a flange 1 larger than the inner diameter of the refrigerant pipe 15.
7, the conical orifice 10 is inserted into the inside of the pipe from the small diameter portion 16 on the inlet side. Next, the distributor insertion side refrigerant pipe 15 into which the conical orifice 10 is inserted is inserted into the distributor main body 8, and the outer periphery is brazed and welded. Further, each distribution pipe 14 is inserted into the distribution hole 13 of the distributor body 8, and each distribution pipe 14 is brazed and welded.

Embodiment 2 FIG. In the first embodiment of the present invention, the distributor body 8 and the conical orifice 1 with the flange 17 are provided.
0, the configuration of the distributor insertion side refrigerant pipe 15 and the distribution pipe 14 has been described. However, as shown in FIG.
2, first gas-liquid mixing chamber 9a, second gas-liquid mixing chamber 9b, flange 1
7, a conical orifice 10, a distribution pipe 14, and a refrigerant pipe 15 on the distributor insertion side.

Embodiment 3 In Embodiment 1 of the present invention, the conical orifice 10 is provided with a flange so that the outer shape on the entrance side and the outer shape on the exit side have different diameters.
As shown in the side cross-sectional view of FIG.
5. An orifice stop protruding from the inside of the refrigerant pipe 5 and a reducing section 1 whose cross-sectional area gradually decreases inside the distributor insertion side refrigerant pipe 15.
The orifice 22 with the gas-liquid mixing chamber 21 is fixed in a state where the length 9 is long and is locked on the outer peripheral surface of the contraction portion 20. Therefore, it is possible to shorten the entire length of the distributor main body 8 in which the distributor insertion side refrigerant pipe 15 is provided.

Further, in the third embodiment of the present invention in which the orifice is provided inside the pipe, since the entire length of the orifice 10 is hardly affected by structural restrictions, as shown in FIG. Accordingly, a mechanism that prevents a sudden decrease in pressure and enhances the effect of reducing refrigerant noise may be used.

[0016]

According to the distributor of the air conditioner of the present invention, a refrigerant circuit having a compressor, a condenser, a decompression device, and an evaporator is provided between the decompression device and the evaporator, and has an inlet. The conical orifice that increases the flow of the contracted refrigerant, the cross-sectional area of which gradually decreases in the direction of the flow of the refrigerant, and the gas-liquid two-phase refrigerant that has been accelerated by the conical orifice are mixed,
In a distributor having a distribution hole to which a distribution pipe for distributing the refrigerant is connected, a conical orifice for increasing the flow of the refrigerant is inserted and disposed inside the refrigerant pipe on the distributor inlet side. By providing a conical orifice inside the distributor inlet side refrigerant pipe, the overall length of the distributor main body can be shortened, and the cost of the distributor main body can be reduced.

Further, according to the distributor of the air conditioner of the present invention, the end of the conical orifice whose cross-sectional area gradually decreases is provided to be larger than the inner diameter of the inlet refrigerant pipe of the distributor, and the other end is formed as a flange. Since it is configured to be smaller than the inner diameter of the refrigerant pipe, it is possible to provide a distributor that can achieve high quality performance without being erroneously assembled at the time of assembling the distributor, and has an effect of contributing to cost reduction. .

Further, according to the distributor of the air conditioner of the present invention, since the conical orifice having the reduced portion having the reduced cross-sectional area is elongated and inserted in the refrigerant pipe, the pressure can be rapidly reduced. This has the effect of preventing the flow of the refrigerant and reducing the flow noise of the refrigerant.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a distributor of an air conditioner according to Embodiment 1 of the present invention.

FIG. 2 is an exploded side sectional view showing a distributor of the air conditioner according to Embodiment 1 of the present invention.

FIG. 3 is an enlarged view showing a relationship between a conical orifice and a refrigerant pipe of the distributor of the air conditioner according to Embodiment 1 of the present invention.

FIG. 4 is a side sectional view showing a distributor of an air conditioner according to Embodiment 2 of the present invention.

FIG. 5 is a side sectional view showing a distributor of an air conditioner according to Embodiment 3 of the present invention.

FIG. 6 is a refrigerant circuit diagram of a general air conditioner.

FIG. 7 is a side sectional view showing a distributor of a conventional air conditioner.

[Explanation of symbols]

8 distributor body, 10 conical orifice, 13 distribution hole, 14 minute piping, 15 distributor insertion side refrigerant piping, 17
Flange, 18 Orifice stop, 19 Reduction, 20
Contraction part, 21 gas-liquid mixing chamber part.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Kunihiro Inui 2-6-1, Otemachi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Engineering Co., Ltd. (72) Masahiro Nakayama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo No. Mitsubishi Electric Corporation

Claims (3)

[Claims] 1. A refrigerant circuit having a compressor, a condenser, a decompression device, and an evaporator is provided between the decompression device and the evaporator, and has a cross-sectional area gradually in a direction of a refrigerant flow from an inlet. A conical orifice for increasing the flow of a reduced contraction refrigerant, a distributor having a distribution hole to which a distribution pipe for mixing the gas-liquid two-phase refrigerant accelerated by the conical orifice and distributing the refrigerant is connected. 3. The refrigerant distributor of an air conditioner according to claim 1, wherein a conical orifice for increasing the flow of the refrigerant is inserted and disposed in the refrigerant pipe on the insertion side of the distributor. 2. An end of a conical orifice whose cross-sectional area is gradually reduced is provided with a flange portion larger than the inner diameter of the inlet refrigerant pipe of the distributor, and the other end is provided with a smaller diameter than the inner diameter of the refrigerant pipe. The refrigerant distributor for an air conditioner according to claim 1. 3. A refrigerant distributor for an air conditioner according to claim 1, wherein a conical orifice having a longer reduced portion whose cross-sectional area is reduced is inserted and disposed in the refrigerant pipe.