KR100758910B1 - Outdoor Unit of Air Conditioner - Google Patents

Abstract

The present invention is to provide an outdoor unit of the air conditioner that can reduce the vibration and noise due to the long pipe length of the outdoor unit of the air conditioner and to facilitate the management for vibration control. To this end, the present invention provides a resonant frequency of at least one of the pipes of the outdoor unit of the air conditioner higher than the operating frequency range of the compressor and at the same time provides an outdoor unit of the air conditioner having a pipe for ensuring flexibility.

According to the present invention, by reducing the number of pipes to manage the vibration control, vibration and noise of the outdoor unit of the air conditioner is reduced, management is easy and the structure is simplified.

Air Conditioner, Outdoor Unit, Piping, Resonance Frequency

Description

Outdoor Unit of Air Conditioner {Outdoor Unit of Air Conditioner}

Figure 1a is a block diagram showing a refrigerant flow during the cooling operation of the conventional air conditioner.

Figure 1b is a block diagram showing the flow of the refrigerant during the heating operation of the conventional air conditioner.

Figure 2 is a perspective view of the outdoor unit piping of the conventional air conditioner.

Figure 3 is a perspective view showing an embodiment of the piping of the outdoor unit of the air conditioner according to the present invention.

4 is a configuration diagram schematically showing the structure of the piping of FIG.

5a, 5b and 5c are schematic views showing the structure of modifications of the outdoor unit piping of the air conditioner according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: compressor 20: four sides

22: outdoor heat exchanger 24: indoor heat exchanger

26: expansion valve

100: four sides 102: suction pipe

104: discharge pipe 106: first connection pipe

108: second connecting pipe

The present invention relates to an outdoor unit of an air conditioner, and more particularly, to an outdoor unit of an air conditioner in which a vibration and noise are reduced by improving a structure.

In general, an air conditioner is a device that compresses, condenses, expands, and evaporates a refrigerant to discharge cold air generated in the process to the room to maintain indoor air at a desired temperature. In this case, all-in-one unit, separate type that separates the outdoor unit and indoor unit, built-in ceiling type that is built-in without being exposed to the outside, wall-mounted type that allows the indoor unit to be hung on the wall, and several indoor units There are a multi type which can be operated. Here, the separate type air conditioner in which the outdoor unit and the indoor unit are separated will be described.

Figure 1a is a schematic diagram showing the cooling process of the conventional air conditioner, Figure 1b is a schematic diagram showing the heating process of the conventional heater. 2 is a perspective view showing a pipe of an outdoor unit of a conventional air conditioner.

The outdoor unit of the air conditioner as shown in Figure 1a, b, the compressor 10 to compress the refrigerant to a high temperature and high pressure, the four sides of the refrigerant to control the flow of the refrigerant to be used as a heater and a cooler condensing the refrigerant, Outdoor heat exchanger (22) for evaporating or evaporating, expansion valve (26) for depressurizing refrigerant to a low temperature and low pressure state, suction pipe (102) for guiding refrigerant passing through the four sides (20) into the compressor, and the four sides And a first connection pipe 106 for guiding refrigerant between the indoor heat exchanger and a second connection pipe 108 for guiding refrigerant between the four sides and the outdoor heat exchanger.

In addition, the indoor unit of the air conditioner is composed of an indoor heat exchanger and a fan. When the refrigerant evaporates through the evaporator, the air is cooled by taking heat from the surrounding air. This filled air is rotated by a fan behind the evaporator and discharged into the room.

Conventionally, all pipes are manufactured as long as possible to withstand the stress that may occur during the air conditioner durability test and to ensure flexibility.

Referring to the configuration of FIG. 2 to guide the refrigerant passing through the four sides 100 into the compressor 10 around the four sides 100 to selectively guide the refrigerant discharged from the compressor to the indoor heat exchanger or the outdoor heat exchanger side The refrigerant pipe 102, the first connection pipe 106 for guiding the refrigerant between the four sides 100 and the indoor heat exchanger 24, the refrigerant between the four sides 100 and the outdoor heat exchanger (22). The second connecting pipe 108 is guided.

Looking at the shape of the suction pipe 102, the discharge pipe 104, the first connection pipe 106, the second connection pipe 108 in Figure 2 it can be seen that all the pipes are as far back as possible to make the pipe long. .

However, in the outdoor unit of the air conditioner configured as described above, when the compressor is operated, vibration of the compressor is generated, and vibration is transmitted to the first connection pipe and the second connection pipe through the suction pipe and the discharge pipe. A separate device was needed to reduce vibrations in both pipes. This is because the pipe is long and flexible and the resonance frequency of the pipe is excessively large.

In addition, when a separate device for reducing vibration in each of the pipes as described above, there is a problem that not only increases the manufacturing process accordingly, but also increases the manufacturing cost and product cost by the manufacturing process.

In order to solve the above problems, the present invention has an object to improve the structure to reduce the vibration management piping and to ensure the remaining piping to absorb all the stress in the flexible pipe.

In order to achieve the above object, the present invention provides a compressor, a four-sided, an indoor heat exchanger, an outdoor heat exchanger and a suction pipe connecting the suction side and the four sides of the compressor, connecting the discharge side and the four sides of the compressor. A discharge pipe, a first connection pipe connecting the four sides and the indoor heat exchanger, and a second connection pipe connecting the four sides and the outdoor heat exchanger, and at least one of the four pipes has a resonance frequency of the operation of the compressor. Make it higher than the frequency range.

The resonance frequency of the pipes may be changed by adjusting the length of the pipes. Preferably, the pipe formed higher than the operating frequency range of the compressor is formed short to less than 2/3 times the length of the remaining pipe. In addition, it is preferable that two of the four pipes the resonance frequency is higher than the operating frequency range of the compressor.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

3 and 4, an embodiment of an outdoor unit of an air conditioner according to the present invention will be described.

Figure 3 is a perspective view showing a pipe around the four sides of the outdoor unit of the air conditioner according to the present invention, Figure 4 is a block diagram showing an embodiment of the present invention.

The piping unit of the present invention, the suction pipe 102 connecting the suction side and the four sides 100 of the compressor 10, the discharge pipe 104 connecting the discharge side and the four sides 100 of the compressor 10, four sides The first connection pipe 106 connecting the 100 and the indoor heat exchanger 24, and the second connection pipe 108 connecting the four sides 100 and the outdoor heat exchanger 22.

Referring to Figures 1a, b, the refrigerant conversion process of the cooling operation and heating operation will be described as follows.

In the case of the cooling operation, referring to FIG. 1A, the refrigerant introduced into the compressor 10 is pressurized to a high temperature and high pressure state through a pressurizing action and discharged to the four sides 100. Through the four sides 100, the refrigerant enters the outdoor heat exchanger 22 and flows through the inside of the outdoor heat exchanger 22 to exchange heat with external air, thereby changing to a room temperature and high pressure. The refrigerant passing through the outdoor heat exchanger 22 is decompressed to enter the indoor heat exchanger 28 through the expansion valve 26 so as to easily evaporate. The refrigerant entering the indoor heat exchanger 28 flows through the interior of the indoor heat exchanger 22 and undergoes heat exchange with external air to enter the compressor 10 again through the four sides 100 at a low temperature and low pressure.

In the case of heating operation, referring to Figure 1b the movement direction of the refrigerant in the suction pipe 102 and the discharge pipe 104 is the same as the case of the air conditioner. However, the movement direction of the refrigerant in the first connection pipe 106 and the second connection pipe 108 is opposite to that of the air conditioner. That is, in the air conditioner, the outdoor heat exchanger 22 serves as a condenser and the indoor heat exchanger 24 serves as an evaporator. In contrast, in the heater, the outdoor heat exchanger 22 serves as an evaporator and the indoor heat exchanger 24 serves as a condenser.

The device that enables the above-described operation is the four sides (100).

Looking at the action of the four sides 100, the coolant discharged from the compressor 10 is moved to the outdoor heat exchanger 22 through the four sides in the case of the air conditioner, the refrigerant discharged from the compressor 10 in the case of the heater It is moved to the indoor heat exchanger 24 through the four sides (100).

In FIG. 3, the suction pipe 102 and the discharge pipe 104 are connected to the compressor 10 and the first connection pipe 106 is connected to the indoor heat exchanger 24. The second connection pipe 108 is connected to the outdoor heat exchanger 22.

In detail, the first connection pipe 106 is connected to a service valve (not shown) attached to the outdoor unit case to control the flow of the refrigerant and charge the refrigerant, and to guide the refrigerant from the service valve back to the indoor heat exchanger. (Not shown) is installed.

The first connection pipe 106 to guide the refrigerant from the four sides 100 to the indoor heat exchanger 24 and the second connection pipe 108 to guide the refrigerant from the four sides 100 to the outdoor heat exchanger 22. It can be seen that the length of the) is shorter than the existing pipe (Fig. 2). This is to shorten the length of the two pipes so that the resonance frequency of the two pipes is formed higher than the operating frequency range of the compressor 10.

In general, resonance refers to a phenomenon in which a vibration system receives an external force having the same frequency as its natural frequency and periodically increases its amplitude. The frequency at which resonance occurs is a resonance frequency.

Next, a method of moving the resonance frequency of the pipe will be described.

In general, the greater the stiffness of a material, the greater the resonant frequency. Therefore, it is possible to shift the resonant frequency by adjusting the stiffness of the material.

Stiffness is usually determined by the correlation between the material properties and the shape and external force of the structure. The shorter the material, the thicker the material, and the larger the structure that can withstand the material depending on the shape, the greater the rigidity.

In this way, at least one of the factors for determining the resonance frequency is changed so that resonance does not occur within the operating frequency range of the compressor.

In this way, the four pipes of the pipe are divided into a rigid pipe and a flexible pipe to reduce the modal density of the pipe with a high rigidity to avoid complete resonance, and the flexible pipe is subjected to an air conditioner impact due to transportation. It is possible to improve durability by absorbing all possible stresses.

In addition, since vibration control does not require a vibration damping device with a large rigidity, vibration damping devices are used only for flexible piping.

Figure 3 is to increase the resonant frequency of the two pipes by shortening the length of the two pipes. As a result of experiments by the inventors, it was confirmed that the length of the flexible pipe is preferably 1.5 times or more, that is, the length of the short pipe is 2/3 times or less of the length of the flexible pipe. That is, when the length of a flexible pipe was made 1.5 times or more of the length of a short pipe, the vibration of a short pipe fell rapidly.

Therefore, the length of the suction pipe 102 and the discharge pipe 104 is preferably manufactured to 1.5 times or more of the length of the first connection pipe 106 and the second connection pipe 108.

On the other hand, the number of pipes to shorten the length is not limited, but in order to secure flexibility, it is preferable to shorten the two pipes of the pipe.

Two of the four pipes in the above pipe section is shortened and the other two pipes are shortened to shorten the mode density of the entire outdoor unit to help reduce vibration and noise, while the other two long pipes provide flexibility. As a pipe, it absorbs all the stress that may occur during impact.

Since the resonance frequency of the first connection pipe 106 and the second connection pipe 108 is very high, the pipe to be managed in the vibration control of the pipe is reduced to two of the suction pipe 102 and the discharge pipe 104. A vibration damping device is installed in the suction pipe 102 and the discharge pipe 104 to reduce the vibration level.

In another embodiment, Figure 5a is made to shorten the length of the discharge pipe 104 and the second connection pipe 108, Figure 5b is made to shorten the length of the suction pipe 102 and the discharge pipe 104, 5c shortens the length of the suction pipe 102 and the first connection pipe 106.

The present invention is not limited to the above-described embodiment, and the resonance frequency of the pipe can be changed by other methods. For example, the material of the pipe can be changed to a material of high rigidity, and the resonance frequency can be changed by changing the thickness or diameter of the pipe.

Those skilled in the art can make modifications without departing from the spirit of the invention, and such modifications are within the scope of the invention.

The effect of the outdoor unit of the air conditioner according to the present invention described above is as follows.

First, the length of the pipe of the outdoor unit of the conventional air conditioner is long, the structure is complicated, there is an advantage that the structure of the pipe of the outdoor unit of the air conditioner is simplified and the production and management is convenient.

Second, in the related art, a vibration damping device should be provided to reduce vibrations of all pipes, but the cost of development, management, etc. is reduced by reducing the number of pipes requiring management for vibration damping of pipes.

Third, there is an advantage that the vibration reduction effect is excellent because the mode density of the entire pipe is reduced compared to the conventional pipe.

Claims (4)

A compressor for compressing the refrigerant to a state of high temperature and high pressure; Four sides to selectively guide the refrigerant discharged from the compressor to the indoor heat exchanger or the outdoor heat exchanger side; And A discharge pipe guiding the refrigerant discharged from the compressor to the four sides, a suction pipe guiding the refrigerant passing through the four sides into the compressor, a first connection pipe guiding the refrigerant between the four sides and an indoor heat exchanger, and Comprising a pipe portion having a second connecting pipe for guiding the refrigerant between the four sides and the outdoor heat exchanger, At least one of the pipes constituting the pipe portion of the outdoor unit of the air conditioner, characterized in that the resonant frequency is greater than the rest of the pipe so that the resonance frequency is higher than the operating frequency range of the compressor. The method of claim 1, Resonant frequency change of the pipes is an outdoor unit of the air conditioner, characterized in that made by adjusting the length of the pipe. The method of claim 2, An outdoor unit of an air conditioner, wherein a length of a pipe having a resonance frequency higher than an operating frequency range of the compressor is shorter than two thirds of the length of the remaining pipe. The method according to any one of claims 1 to 3, The outdoor unit of the air conditioner, characterized in that the resonance frequency of the two pipes of the pipe constituting the pipe portion is formed higher than the operating frequency range of the compressor.

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