CN1211615C - Noise reducing structure for outdoor unit of large air conditioner - Google Patents

Abstract

The present invention provides a noise reduction structure of an outdoor unit of a large-sized air conditioner. The outdoor unit of the large-sized air conditioner of the present invention is provided with a constant-speed converter and an inverter converter for compressing a refrigerant so as to circulate the refrigerant through a refrigerating cycle to variably change air-cooling capacity of the air conditioner. In the outdoor unit, an anti-noise barrier provided with protrusions surrounds the inverter compressor, thereby preventing noise generated from the inverter compressor from being transmitted to the outside.

Description

Noise reduction structure for outdoor unit of large air conditioner

technical field

The present invention relates to an outdoor unit of a large air conditioner provided with a constant speed compressor and an inverter compressor inside, and more particularly to an outdoor unit for preventing noise generated from the inverter compressor from being transmitted to the outside of a large air conditioner Lower structure.

Background technique

Generally, a large-scale air conditioner is a device for keeping indoor air comfortable, and is mainly composed of the following components: an indoor unit, which is composed of an indoor side blower and an evaporator, and is installed on the indoor side; an outdoor unit, which is composed of an outdoor side blower. , Condenser and compressor, etc., installed outside the outdoor.

FIG. 1 is a perspective view showing an outdoor unit of a conventional large air conditioner.

As shown in Figure 1, the outdoor unit of existing large-scale air conditioner is made of following parts: shell 8, and it is formed with exhaust port 2a, the front panel 2 of air inlet 4a respectively and back panel 4 and sets described Front panel 2 and the bottom plate (base pan) 6 above it of described back panel 4 form; Outdoor side blowing fan 10, it is arranged on the inner side of described front panel 2, blows outdoor air forcibly; Condenser 12, it is arranged on The inner side of the back panel 4 is used to exchange heat between the outdoor air and the refrigerant that are forced to be blown by the outdoor blowing fan 10; One side of the condenser 12 compresses the refrigerant to make it undergo a refrigeration cycle.

Here, the compression unit 14 is composed of a constant-speed compressor 14a operated at a constant speed and an inverter compressor 14b operated at a variable speed, and the rotation speed of the inverter compressor 14b is changed according to frequency changes. At the same time, the flow rate of the refrigerant in the cycle refrigeration cycle is adjusted to change the refrigeration power.

That is, the inverter compressor 14b is continuously operated while the air conditioner is operating with a variable speed according to the cooling power, and the constant speed compressor 14a is operated when a larger cooling power is required here.

Here, the inverter compressor 14b rotates at a high speed in proportion to the value of the input frequency, so as to increase the circulating cooling capacity and effectively adjust the cooling power.

In addition, reference numeral 16 represents a motor seat, which is fixed for the motor that makes the outdoor blowing fan rotate, and is installed on the condenser; reference numeral 18 represents a partition, which divides the space for installing the compressor and the installation of the condenser in the interior of the housing. device space.

The operation of the conventional art constructed in this way will be described below.

When power is applied, a signal requiring lower cooling power is input into the inverter compressor 14b, and the inverter compressor 14b operates at a low speed, reducing the refrigerant flow rate in the refrigerating cycle.

Here, when a signal requesting a large cooling power is input to the inverter compressor 14b, the inverter compressor 14b increases the operating speed and increases the flow rate of the refrigerant in the cooling cycle.

Then, a signal requiring a larger cooling power is input into the inverter compressor 14b, and an overload is applied to the inverter compressor 14b, so that the constant-speed compressor 2a and the inverter Working together with the compressor compressor 14b can further increase the refrigerant flow rate of the cycle refrigeration cycle.

However, in the outdoor unit of a large air conditioner having such a structure, since the rotational speed of the inverter compressor 14b varies with the input frequency, noise is generated due to fluctuations in refrigerant pressure and structural vibrations.

However, since the inverter compressor installed in the outdoor unit of the large-scale air conditioner of the prior art is not installed in another space such as a machine room, unlike the inverter compressor installed in a refrigerator, The partition wall in the housing (not shown) divides the space, so there is a problem that the noise generated during the operation of the inverter compressor 14b is easily discharged to the outside.

Contents of the invention

The present invention is proposed in view of the aforementioned problems of the prior art. The purpose of the present invention is to provide a noise reduction structure for an outdoor unit of a large air conditioner, which is used to prevent the The noise generated by the compressor compressor is transmitted to the outside through the casing.

In order to achieve the above object, the present invention relates to a noise reduction structure for an outdoor unit of a large air conditioner, which is characterized in that the outdoor unit of a large air conditioner is equipped with a compressor that compresses the refrigerant through a refrigeration cycle. In the machine, there is provided a noise preventing portion surrounding the compressor in which the noise radiated from the compressor is formed in a direction in which the noise is concentratedly radiated to prevent the noise radiated from the compressor from being transmitted to the outside. side of the noise prevention unit.

Description of drawings

FIG. 1 is a diagram showing an outdoor unit in a large air conditioner of the prior art;

FIG. 2 is a diagram showing a noise reduction structure for an outdoor unit of a large air conditioner of the present invention;

Fig. 3 is a sectional view along the line A-A in Fig. 2;

Fig. 4 is a sectional view along the line B-B in Fig. 2;

Fig. 5 is the figure of another outdoor unit noise reduction structure in the large air conditioner of the present invention;

Fig. 6 is a sectional view along line C-C in Fig. 5 .

Detailed ways

The preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

2 is a noise reduction structure for an outdoor unit of a large air conditioner according to the present invention, FIG. 3 is a sectional view along line A-A in FIG. 2 , and FIG. 4 is a sectional view along line B-B in FIG. 2 . In addition, FIG. 5 is a diagram showing another noise reduction structure for an outdoor unit in the large air conditioner of the present invention, and FIG. 6 is a cross-sectional view along line C-C in FIG. 5 .

The noise reduction structure for the outdoor unit of the large air conditioner of the present invention is as shown in Figure 2 and Figure 5, and is composed of the following parts: a shell 58 made of a front panel 52, a back panel 54 and a bottom plate 56, wherein in the The front panel 52 and the back panel 54 are installed on the top of the base plate 56. The front panel 52 and the back panel 54 are respectively formed with an exhaust port 52a and an air intake port 54a; the outdoor side blower 60 is forced to blow the outdoor air to The inner side of the shell 58; the condenser 62, which is arranged on the inner side of the back panel 54, makes the refrigerant exchange heat with the outdoor air blown by the outdoor blower 60; the constant speed compressor 64a and the inverter A compressor compressor 64b, these two compressors are arranged on one side of the condenser 62, compress the refrigerant, and perform constant speed operation and variable speed operation in a manner of adjusting the refrigerant flow rate in the cycle refrigeration cycle according to the refrigeration power a noise preventing portion 70 in which bent portions 72, 74 surrounding the inverter compressor 64b are formed to prevent noise radiated from the inverter compressor 64b from being transmitted to the outside.

Here, a sound-absorbing and insulating material (not shown in the figure) is further provided inside the noise preventing portion 70 so as to surround the outer circumference of the constant-speed compressor 64a. Whether or not the sound-absorbing and insulating material is stacked A sound-absorbing material (not shown) of a porous material such as woven cloth or foam and a sound-insulating material (not shown) of a rubber or metal material.

Here, the inverter compressor 64b operates continuously at a variable speed according to the cooling power while the air conditioner is operating. also works.

In particular, since the rotational speed of the inverter compressor 64b changes according to the input frequency, a lot of noise is generated due to fluctuations in refrigerant pressure during operation and structural vibrations. Therefore, the noise radiation characteristics of the inverter compressor 64b were investigated through experiments, and the curved portions 72 and 74 were formed on one side of the noise preventing portion 70 in the direction in which noise is concentrated and radiated.

Here, the noise emitted by the inverter compressor 64b is in the form of a sound wave, and the noise enters the noise preventing part 70 non-perpendicularly through the bent parts 72 and 74 formed on the noise preventing part 70, And it is reflected to the inner side of the noise prevention part 70 again.

In addition, in order to further improve the noise prevention effect, on the inner side of the noise prevention part 70, a sound-absorbing and insulating material 76 is provided to absorb and block the noise generated by the inverter compressor 64. The inner surface of the noise prevention part 70 at the portion of the curved parts 72 and 74 described above.

The sound-absorbing and insulating member 76, as shown in FIG. 3 , is composed of a sound-absorbing material 76a and a sound-insulating material 76b. The sound-absorbing material 76a is formed of porous materials such as felt or fiber silk material and foam material with extremely large air content per unit volume. The sound-insulating material 76b is formed of rubber or metal material, and is stacked on the sound-absorbing material 76a.

Specifically, as shown in FIG. 4 , the bent portion 72 formed on the noise preventing portion 70 forms a semicircular protruding cross section at a certain interval h above and below one side of the noise preventing portion 70 .

In addition, as shown in FIG. 6 , another form of bent portion 74 formed on the noise preventing portion 70 forms a 1/4 circle protruding cross section at a predetermined interval h above and below one side of the noise preventing portion 70 .

At the bottom end portion of the bent portion 74, a vent 74a is formed to discharge heat generated from the inverter compressor 64b.

In addition, when the heat generated by the inverter compressor 64b is large, the upper surface of the noise prevention part 70 may be opened, and the outdoor air blower 60 may be installed on the upper surface of the inverter compressor 64b, which will be controlled by The heat generated by the inverter compressor 64b is discharged.

The operation of the present invention constituted as described above will be described below.

When the inverter compressor 64b is operated by external power supply, since the refrigerant flow rate of the cycle refrigeration cycle is adjusted according to the cooling power while the rotation speed is changed, noise is generated from the inverter compressor 64b.

However, the noise generated from the inverter compressor 64b is partially absorbed or reduced by the sound absorbing and isolating member 76, and the noise preventing portion 70 surrounding the inverter compressor 64b further blocks transmission to the outside. .

In addition, since the noise does not enter vertically but obliquely enters the bent portions 72, 74 formed in the noise preventing portion 70, it is reflected again inside the noise preventing portion 70 without being transmitted. to the outside.

On the other hand, the heat generated from the inverter compressor 64 b is discharged from the vent 74 a formed in the bent portion 74 in the noise preventing portion 70 .

In the noise reduction structure for an outdoor unit of a large air conditioner according to the present invention configured as described above, a curved portion is formed so as to surround the outer periphery of the inverter compressor 64b. In order not to transmit the noise generated by the inverter compressor 64b to the external noise prevention unit, the noise generated by the inverter compressor is repeatedly reflected inside the noise prevention unit to prevent it from being transmitted to the outside. It helps to reduce noise pollution and improve the performance of products.

Claims (10)

1. the off-premises station noise reduction structure of a large-size air conditioning machine, this structure is used for the off-premises station of large-size air conditioning machine, this off-premises station has compressor, this compressor compresses the cold-producing medium in circularly cooling cycle, it is characterized in that, one noise is set on this off-premises station prevents portion, this noise portion of preventing surrounds described compressor, prevent to be formed with in the portion bend at this noise, to prevent noise transmission from described compressor radiation to the outside, described bend is formed at noise prevents portion from the noise of the direction of described compressor concentrated area radiation a side.

2. the off-premises station noise reduction structure of air conditioner as claimed in claim 1 is characterized in that, described compressor is arranged at a side of constant velocity type compressor, is adopted as the inverter compressor that the power that changes air conditioner can change running speed.

3. the off-premises station noise reduction structure of air conditioner as claimed in claim 1 is characterized in that, prevents in the portion at described noise, is provided with the suction acoustic material at the medial surface of removing beyond the described bend.

4. the off-premises station noise reduction structure of air conditioner as claimed in claim 3 is characterized in that, described suction acoustic material is by sound-absorbing material and acoustic material is overlapping forms.

5. the off-premises station noise reduction structure of air conditioner as claimed in claim 4 is characterized in that, described sound-absorbing material is formed by porous material.

6. the off-premises station noise reduction structure of air conditioner as claimed in claim 4 is characterized in that, described acoustic material is formed by elastomeric material.

7. the off-premises station noise reduction structure of air conditioner as claimed in claim 1 is characterized in that, described noise prevents that portion from being formed by metal material.

8. the off-premises station noise reduction structure of air conditioner as claimed in claim 1 is characterized in that, described bend has certain intervals up and down, forms the outstanding cross section of semicircle shape and is formed on the side that described noise prevents portion.

9. the off-premises station noise reduction structure of air conditioner as claimed in claim 1 is characterized in that, about the described bend, has certain intervals, forms the outstanding cross section of 1/4 circle shape and is formed on the side that described noise prevents portion.

10. the off-premises station noise reduction structure of air conditioner as claimed in claim 9 is characterized in that, in described bend, in the mode of discharging from the heat of described compressor generation, at the bottom part formation ventilating opening of 1/4 toroidal.

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