JPH03113250A - Air-conditioner - Google Patents

Abstract

PURPOSE:To eliminate flowing sound of refrigerant and vibration of piping by providing a refrigerant flow rate control valve device in each room unit and incorporating a capillary tube in the middle of a piping part extending from each control valve device to each heat exchanger. CONSTITUTION:Refrigerant supplied from an outdoor unit 1 is drawn by respective refrigerant flow rate control valve devices 4a-4c in mixed refrigerant of liquid and gas refrigerants. The refrigerant further reaches heat exchangers 5a-5c via a connection piping 10 after passing through a capillary tube 9 connected to the above members and a muffler 8 connected to the capillary tube and likewise returns to the compressor 2 from a gas refrigerant side piping 11. The refrigerant becomes complete liquid one by allowing the mixed refrigerant of liquid and gas to pass through the capillary tube 9. Hereby, flowing sound of the refrigerant is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to improvement of noise (refrigerant noise) of an air conditioner.

[Prior Art] Fig. 2 is a refrigerant circuit diagram showing a conventional air conditioner disclosed in, for example, Japanese Patent Application Laid-Open No. 61-208295. In the figure, (1) is an outdoor unit, and (2) is a variable capacity unit. compressor,
(3a) (3b) (3c) are indoor units, (4a) (4b) (4c) are indoor units (3a)
(3b) The refrigerant flow control valve device installed in each of (3c), (5) is the indoor unit (3a) (3b)
(3c) is the heat exchanger, (6) is the indoor unit (3a)
(3b) (3c) is the blower, (7) is the outdoor unit (
1) is a heat exchanger.

Next, the operation will be explained. The refrigerant heat exchanged by the heat exchanger (7) of the outdoor unit (1) is transferred to the indoor unit (3).
), each indoor unit (
The amount of refrigerant is adjusted to match the capacity of (3a) (3b) (3c), heat exchanged by the heat exchanger (5), and the blower (
6) creates a circuit that blows air into the room.

[Problems to be Solved by the Invention] Conventional air conditioners have an oval configuration as described above, and when each indoor unit has different settings, the refrigerant flow rate,
Since the flow rate is different for each indoor unit, there is a problem in that refrigerant noise is generated between the refrigerant flow control valve device and the inlet of the heat exchanger due to the mixture of gas and liquid refrigerant. In addition, there was also the problem that piping vibrations and the like were generated due to the generation of refrigerant noise.

This invention was made to solve the above-mentioned problems, and aims to provide a comfortable air conditioner that has the effect of eliminating refrigerant noise and vibration.

[Means for Solving the Problems] An air conditioner according to the present invention has a capillary tube and a muffler attached to a piping section from a refrigerant flow rate control valve device to a heat exchanger in an indoor unit.

[Function] The air conditioner according to the present invention has a capillary tube in the piping section from the refrigerant flow rate control valve device to the heat exchanger.
The flow state of the refrigerant is stabilized.

In the indoor unit configured as described above, the amount of refrigerant from the outdoor unit is adjusted by the refrigerant flow control valve device (4), and the mixed refrigerant of liquid and gas is passed through the capillary tube (9), so that the refrigerant is completely absorbed. It becomes a liquid refrigerant, reducing refrigerant noise such as rumbling and hissing, passes through the muffler (8), reduces high-frequency refrigerant noise, and passes through the connecting pipe (10) to the heat exchanger (5).
) and is circulated to the gas side pipe (11).

[Example] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, (5) is a heat exchanger, (4) is a refrigerant flow control valve device, and the refrigerant is controlled by this refrigerant flow control valve device a (
In step 4), the liquid and gas refrigerant are mixed. (9) is a capillary tube connected to the refrigerant flow control valve device (4), (8) is a muffler connected to the capillary tube (9), and (10) is a muffler (8).
) to the heat exchanger (5).

(11) is the gas side piping.

[Effects of the invention] As described above, according to the present invention, a capillary tube is inserted into the piping on the liquid pipe side to stabilize the liquid refrigerant, so unpleasant refrigerant noise can be suppressed and there is no vibration. This has the effect of providing a comfortable air conditioner.

[Brief explanation of drawings]

FIG. 1 is a heat exchanger system diagram of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a refrigerant circuit diagram showing a conventional air conditioner. (1) is an outdoor unit, (2) is a variable capacity compressor, (3
) is the indoor unit, (4) is the refrigerant flow control valve device, (5
) is the heat exchanger of the indoor unit (3), (6) is the blower,
(7) is the heat exchanger of the outdoor unit (1), (8) is the muffler, and (9) is the capillary tube. (lO) is the connecting pipe. (11) is a gas pipe. Agent Masuo Oiwa's procedure amendment (voluntary) 1/11 1990 El

Claims (1)

[Claims] In a multi-room air conditioner equipped with multiple indoor units connected to one outdoor unit with a variable capacity compressor, the flow rate from the refrigerant flow control valve device attached to the indoor unit to the heat exchanger is An air conditioner characterized by having a capillary tube in the piping section.