JPH09280597A - Wall mounted air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce and interrupt a refrigerant flowing sound by covering an expansion mechanism including a straightner, an electronic expansion valve, and a siren horn with a soundproofing plate fixed to a heat exchanger and a water pan. SOLUTION: An expansion mechanism is connected with the side of a heat exchanger 6, the expansion mechanism including a straightner 2, an electronic expansion valve 3, an silencer 4, and a distributor 5 for distributing a refrigerant. A water pan 9 is fixed to a lower part of the heat exchanger 6. A soundproofing plate 1 is fixed to the heat exchanger 6 with a screw 1a and to the water pan 9 with a screw 1b so as to cover the expansion mechanism. Hereby, a refrigerant flowing sound produced from the expansion mechanism is interrupted without being transmitted to an air suction inlet 7 and an air outlet 8. Accordingly, the refrigerant flowing sound is prevented from leaking to the outside.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an air conditioner having a heat exchanger, and is particularly suitable for a wall-mounted air conditioner having an electronic expansion valve.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner, it has been known that a silencer having a constant volume is installed on the downstream side of an expansion mechanism so as to mitigate refrigerant flow noise or to attach a sound absorbing material to a refrigerant pipe. . For example, as an example thereof, Japanese Unexamined Patent Publication No. 61-5347.
There is No. 3 publication. Further, as an example of covering a compressor, which is a noise source in an outdoor unit, with a soundproof cover, Japanese Patent Laid-Open No. 2-9783
The thing of the gazette of No. 3 is mentioned.

[0003]

In the example using the silencer of the prior art described above, since the volume cannot be changed, the silencing characteristic of the silencer is constant, and the refrigerant flow generated from the upstream side of the expansion mechanism. There was a problem that it did not always match the frequency of the sound.

Further, attaching the sound absorbing material to the refrigerant pipe has problems that productivity is poor, cost is high, and processing is difficult. Especially, when it is applied to a wall-mounted air conditioner, an extra space is required, which is disadvantageous in downsizing.

The object of the present invention is to solve the above-mentioned problems and to reduce or block the refrigerant flow noise with a simple structure.
In particular, it is to obtain a miniaturized wall-mounted air conditioner.

[0006]

A wall mounted air conditioner of the present invention comprises a heat exchanger and a sound damping plate fixed to a water receiver so as to cover an expansion mechanism provided with a strainer, an electronic expansion valve and a silencer. ing.

Thus, by covering the expansion mechanism, which is the source of the refrigerant flow noise, it is possible to prevent the refrigerant flow noise propagated to the air suction port and the air discharge port from leaking to the outside. In addition, the sound damping plate not only has a sound insulating effect, but is fixed to the heat exchanger, so that the surface on the heat exchanger side can be eliminated as a sound damping plate, making it easy to install it in a limited space and reducing the amount of water received. Also, by fixing it, there is no fear of resonance.

Further, in the above, the noise control plate is formed with triangular irregularities. As a result, the refrigerant flow sound is reflected and dispersed inside the sound damping plate, and can be consumed and reduced.

Further, in the above, a sound absorbing material is attached to the inside of the sound damping plate. Here, a soft material such as felt is used as the sound absorbing material. This makes it possible to further reduce the noise by absorbing the flowing sound generated.

Further, in the above, the thickness of a part of the sound absorbing material is changed and the sound absorbing material is brought into close contact with the electronic expansion valve. This allows
It is possible to suppress the vibration of the electronic expansion valve itself, and reduce the refrigerant flow noise.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a broken sectional view showing an example in which a noise control plate is provided in a wall-mounted air conditioner according to the present invention,
2 is a side cross-sectional view of FIG. 1, FIG. 3 is a perspective view showing the shape of a sound damping plate, and FIG. 4 is a perspective view showing another embodiment in which the sound damping plate is formed with triangular irregularities, FIG. 5 is a perspective view showing another embodiment in which a sound absorbing material is attached to the inside of a sound damping plate.

The wall-mounted air conditioner has a heat exchanger 6 inside the main body, an electric component box 10 in which control circuit components are housed, and an air suction port 7 and an air discharge port 8 respectively. An expansion mechanism having a strainer 2, an electronic expansion valve 3, a silencer 4 that is a silencer, a distributor 5 that distributes the refrigerant, and the like is connected to the side surface of the heat exchanger 6. Further, a water receiver 9 is fixed below the heat exchanger 6.

In the sound damping plate 1, the heat exchanger 6 is provided with a screw 1a and the water receiver 9 is provided with a screw 1 so as to cover the expansion mechanism.
They are fixed by b. 1 and 2, the expansion mechanism is surrounded by a wall on the back side, the heat exchanger 6 itself on the left side surface, and the electrical component box 10 on the right side surface. It suffices to block at least the front and sides. FIG. 3 shows the shape of the noise control plate 1, which is manufactured by bending with a sheet metal as shown.

As a result, the refrigerant flowing sound generated from the expansion mechanism is blocked without being propagated to the air suction port 7 and the air discharge port 8. Therefore, it is possible to prevent the refrigerant flowing sound from leaking to the outside. Further, since the sound damping plate 1 is fixed to the heat exchanger 6, it is easy to install it in a limited narrow space, and when it is fixed to the water receiver, the sound damping plate 1 itself resonates and the refrigerant flow. You can also turn off the sound without expanding it.

FIG. 4 shows another embodiment, in which the sound damping plate 1 is formed with a large number of triangular irregularities.
As indicated by an arrow 12 in the partially enlarged view shown on the right side of the figure, the refrigerant flowing sound is reflected on the surface of the noise suppressing plate 1. Then, since the directions thereof are mixed, the refrigerant flow noise is dispersed and its energy is consumed and reduced.

FIG. 5 shows still another embodiment, in which the sound absorbing material 13 is attached to the inner surface of the sound damping plate 1 over the entire surface. Here, as the sound absorbing material 13, a soft material such as felt is used. This makes it possible to absorb the refrigerant flow noise generated by the expansion mechanism near the inner surface of the noise control plate 1. Therefore, not only the specific frequency of the refrigerant flowing sound but also the noise can be further reduced in a wide frequency range.

FIG. 6 shows still another embodiment, in which the upper diagram shows a side view of the part of the sound damping plate 1 and the lower diagram shows an enlarged view of the part of the electronic expansion valve. ◆ A part of the sound absorbing material 13 has a thickness different from that of the other parts, and is closely attached so as to surround the electronic expansion valve 3. As a result, it is possible to suppress the vibration of the electronic expansion valve 3 itself and to reduce the refrigerant flowing sound due to the vibration.

As described above, since it is not necessary to attach a damping material or the like to the refrigerant pipe, work on the refrigerant pipe such as replacement of parts and parts service are facilitated. In addition, the refrigerant pipe can be sufficiently reused.

[0019]

According to the present invention, it is possible to provide a wall-hanging type air conditioner which has a simple structure to reduce or block refrigerant flow noise and which is particularly miniaturized.

[Brief description of drawings]

FIG. 1 is a partially broken sectional view showing an embodiment.

FIG. 2 is a side sectional view of the embodiment.

FIG. 3 is a perspective view showing the shape of a sound damping plate.

FIG. 4 is a perspective view showing another embodiment of a sound damping plate, which is formed by triangular irregularities.

FIG. 5 is a perspective view showing another embodiment of a sound damping plate, in which a sound absorbing material is attached inside.

FIG. 6 shows another embodiment of a noise control plate, wherein the upper diagram is a side view and the lower diagram is an enlarged view of a part thereof.

[Explanation of symbols]

1 ... Noise control plate, 2 ... Strainer, 3 ... Electronic expansion valve, 4 ... Silencer, 5 ... Distributor, 6 ... Heat exchanger, 7
... air inlet, 8 air outlet, 9 water receiver, 10 electrical box.

Claims (4)

[Claims] 1. A wall-mounted air conditioner having a back surface of an indoor unit hung on a wall and having a heat exchanger, wherein the heat exchanger and the water receiver cover an expansion mechanism provided with a strainer, an electronic expansion valve, and a silencer. A wall-mounted air conditioner characterized by having a noise control plate fixed to the. 2. The wall-mounted air conditioner according to claim 1, wherein the noise control plate is formed by triangular irregularities. 3. The wall-mounted air conditioner according to claim 1, wherein a sound absorbing material is attached to the inside of the sound damping plate. 4. The wall-mounted air conditioner according to claim 3, wherein a thickness of a part of the sound absorbing material is changed to be in close contact with the electronic expansion valve.