JPH09280589A - Split type air conditioner - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To make a pipe connection part of a split type air conditioner having a refrigeration cycle using a flammable refrigerant outdoor. In a refrigeration cycle using a flammable refrigerant,
The connection portion between the inside / outside connection pipe 4 and each of the inside / outside units 1 and 3 is provided on the outdoor side. Therefore, even if a flammable refrigerant is used as the refrigerant, even if the refrigerant leaks from the connecting portion, it does not leak indoors but leaks outside and diffuses into the atmosphere so that the ignition concentration of the refrigerant gas cannot be reached.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a split type air conditioner having a refrigeration cycle using a flammable refrigerant as a refrigerant.

[0002]

2. Description of the Related Art In a conventional split type air conditioner, even if the connecting portion of the indoor unit is inside the indoor unit or the auxiliary pipe is attached, the length of the auxiliary pipe is shorter than that of the indoor unit When I was on the back of the indoor unit, it was connected indoors. Further, since this connection is made at the installation site, the leak inspection after the connection may not be as accurate as performed at the factory, and a subtle refrigerant leak may not be detected.

If the refrigerant leaks from this connection, the refrigerant may be trapped inside the room.

[0004]

However, in the split type air conditioner constructed as described above, when a flammable refrigerant is used as the refrigerant, since the connection portion is indoors, if the refrigerant leaks, the indoor refrigerant is used. The ignition concentration of gas may be reached.

In view of the above-mentioned problems, the present invention, even if a flammable refrigerant is used as the refrigerant, does not leak into the room but leaks out of the room even if the refrigerant leaks from the connection portion, diffuses into the atmosphere, and increases the ignition concentration of the refrigerant gas. It is something that should not be reached.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a refrigeration cycle using a flammable refrigerant, an outdoor unit having a fan, a heat exchanger and a compressor, a fan and a heat exchanger. And an outdoor unit and a connection pipe connecting the outdoor unit and the indoor unit, and a connection portion between the indoor and outdoor connection pipe and each unit is provided on the outdoor side.

Even if a flammable refrigerant is used as the refrigerant by providing the connecting portion between the inside and outside connecting pipes and each unit on the outdoor side, even if the refrigerant leaks from the connecting portion, it does not leak to the room but to the outside. Can be prevented from reaching the ignition concentration of the refrigerant gas.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In order to solve the above problems, the present invention is a refrigeration cycle using a flammable refrigerant and has an outdoor unit having a fan, a heat exchanger, and a compressor, and a fan and a heat exchanger. The indoor unit and a connecting pipe connecting the outdoor unit and the indoor unit are provided, and a connecting portion between the indoor connecting pipe and each unit is provided on the outdoor side. According to this configuration, even if a flammable refrigerant is used as the refrigerant, even if the refrigerant leaks from the connection part, it does not leak indoors but leaks outside so that it diffuses into the atmosphere and does not reach the ignition concentration of the refrigerant gas. Can be done.

The present invention also relates to a refrigeration cycle using a flammable refrigerant, an outdoor unit having a fan, a heat exchanger and a compressor, an indoor unit having a fan and a heat exchanger, the outdoor unit and the indoor unit. An internal / external connecting pipe for connecting the unit and an auxiliary pipe whose tip is connected to the indoor unit and the external / internal connecting pipe having a length outside the wall in contact with the indoor unit in any pipe drawing direction of the indoor unit. is there.

The present invention also relates to a refrigeration cycle using a flammable refrigerant, an outdoor unit having a fan, a heat exchanger, and a compressor, and an indoor unit having a fan, a heat exchanger, and a connection pipe for connecting the outdoor unit. The connection is only to the outdoor unit.

Further, according to the present invention, the heat insulating material of the connecting pipe is made flame-retardant to prevent the fire from spreading even if a fire occurs at the connecting portion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) In this embodiment, propane is used as a refrigerant, and FIG. 1 is a rear view of an indoor unit of a split type air conditioner of this embodiment. 1 is an indoor unit main body, 2 is 300 from the main body 1 when extended in the longitudinal direction
It is a mm long auxiliary pipe.

FIG. 2 is an installation configuration diagram when the split type air conditioner of this embodiment is installed in the left pipe. 3
Is an outdoor unit, 4 is an indoor unit 1 and an outdoor unit 3
Internal and external connection pipes 5 connecting the two are the walls of the house where the air conditioner is installed.

According to this embodiment, in the indoor unit 1, the left pipe is in the direction farthest from the outlet B of the auxiliary pipe 2, but the auxiliary pipe 2 is 300 mm longer than the main body 1. 50mm gap between main body 1 and wall surface
Even if the wall penetrates 100 mm in thickness, it can be provided on the outdoor side.

(Embodiment 2) Propane is also used as the refrigerant in this embodiment, and FIG. 3 is a rear view of the indoor unit of the split type air conditioner of this embodiment. Reference numeral 2'denotes an auxiliary pipe having a length of 4 m, which is the same as the standard length of a normal indoor / outdoor connecting pipe, and has a shape capable of connecting to the connection port of the outdoor unit 3. FIG. 4 is an installation configuration diagram when the split type air conditioner of the present embodiment is installed in the left pipe.

Further, in this embodiment, since the auxiliary pipe 2'also serves as the inside / outside connecting pipe, the connecting portion is only the outdoor unit 3, so that it is naturally on the outdoor side.

(Embodiment 3) In FIG.
And the heat insulating material of the auxiliary pipe 2 is made of a flame-retardant material.

In this embodiment, even if the refrigerant leaks at the connecting portion between the auxiliary pipe 2 and the inside / outside connecting pipe 4 and ignites from there, it is possible to prevent the fire from spreading through the heat insulating material.

Although propane is used as the refrigerant in Examples 1 and 2, the same effect can be obtained with a refrigerant containing other hydrocarbon gas or a refrigerant containing R32.

[0021]

As is apparent from the above embodiments, the present invention is a refrigeration cycle using a flammable refrigerant and has an outdoor unit having a fan, a heat exchanger, and a compressor, and a fan and a heat exchanger. It is composed of an indoor unit and a connection pipe connecting the outdoor unit and the indoor unit, and since the connection portion between the connection pipe and each unit is provided on the outdoor side, a flammable refrigerant is used as the refrigerant. Even if the refrigerant leaks from the connection portion, it can be prevented from leaking into the room, leaking out of the room, diffusing into the atmosphere, and reaching the ignition concentration of the refrigerant gas.

Further, according to the present invention, there is provided an auxiliary pipe, at least a tip of which is connected to the indoor unit and an inside / outside connecting pipe having a length outside the wall in contact with the indoor unit in any pipe drawing direction of the indoor unit. Therefore, even if the refrigerant leaks from the connection portion, it can be installed so that it does not leak indoors but leaks outdoors and diffuses into the atmosphere to reach the ignition concentration of the refrigerant gas.

Further, the present invention is a refrigeration cycle using a flammable refrigerant, and an indoor unit having an outdoor unit having a fan, a heat exchanger, and a compressor, and a connection pipe connecting the fan, the heat exchanger, and the outdoor unit. If the refrigerant leaks from the connection part, it can be installed so that it does not leak indoors but leaks outside and diffuses into the atmosphere to reach the ignition concentration of the refrigerant gas.

Further, according to the present invention, the heat insulating material of the connecting pipe is made flame-retardant, so that it is possible to prevent the fire from spreading even if an ignition occurs at the connecting portion.

[Brief description of drawings]

FIG. 1 is a rear perspective view of an indoor unit of a split type air conditioner according to an embodiment of the present invention.

FIG. 2 is an installation configuration diagram when the split type air conditioner of the embodiment is installed in the left pipe.

FIG. 3 is a rear perspective view of an indoor unit of a split type air conditioner according to another embodiment of the present invention.

FIG. 4 is an installation configuration diagram of the split type air conditioner of the same embodiment.

[Explanation of symbols]

 1 Indoor unit 2 Auxiliary piping 3 Outdoor unit 4 Internal / external connection piping

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshinori Kobayashi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (4)

[Claims] 1. A refrigeration cycle using a refrigerant containing a flammable refrigerant, an outdoor unit having a fan, a heat exchanger, and a compressor, an indoor unit having a fan and a heat exchanger, the outdoor unit and the room. A split type air conditioner comprising a connection pipe connecting a unit, and a connection portion between the connection pipe and each unit is provided on the outdoor side. 2. An auxiliary pipe, at least the tip of which is connected to the indoor unit and an internal / external connecting pipe having a length outside the wall in contact with the indoor unit in any pipe drawing direction of the indoor unit. The described split type air conditioner. 3. A refrigeration cycle using a refrigerant containing a flammable refrigerant, an indoor unit having an outdoor unit having a fan, a heat exchanger, and a compressor, and a connection pipe connecting the fan, the heat exchanger, and the outdoor unit. Split type air conditioner composed of and. 4. The heat insulating material of the connecting pipe is made flame-retardant.
The described split type air conditioner.