KR20030095626A - heating and cooling system - Google Patents

Abstract

PURPOSE: A heating and cooling system of an air conditioner is provided to reduce noise due to refrigerant using a unit uniforming status of refrigerant introduced into and discharged from an expansion unit and reducing noise. CONSTITUTION: A noise reducing unit(30) comprises at least one body(31) installed on a refrigerant tube connected with an expansion unit installed to an indoor unit to form a refrigerant channel allowing refrigerant to flow in and flow out from an indoor heat exchanger of the indoor unit; a screen(32) installed in an inner space of the body, filtering off foreign matters mixed with the refrigerant, and having a mesh formed thereon to uniform passing refrigerant with two phases; and a cylindrical tube(33) having a peripheral surface installed to be separated from an inner circumferential surface of the body to form a shock absorbing space part(34), and having refrigerant passing holes(33a) reducing noise as refrigerant flowing in a central part thereof flows in and out from the shock absorbing space part. The noise reducing unit is installed to a refrigerant inflow side tube and a refrigerant discharge side tube of the expansion unit, respectively.

Description

Heating and cooling system of an air conditioner

The present invention relates to an air conditioner, and more particularly, to a cooling and heating system of an air conditioner.

A general air conditioner is a device capable of cooling or heating an indoor space by flowing a refrigerant in one direction or another direction.

The air conditioner is divided into a general air conditioner in which one indoor unit is installed in one outdoor unit, and a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit.

These air-conditioning systems differ only in the number of indoor units, whether in general air conditioners or multi-type air conditioners, and the basic refrigerant flow is almost the same.

The air conditioning system of the air conditioner includes a compressor and an outdoor heat exchanger installed in an outdoor unit, and an indoor heat exchanger and an expansion device installed in an indoor unit.

The air conditioning system of such an air conditioner cools or heats an indoor space by flowing a refrigerant in one direction or the other direction under the control of a controller.

When the air conditioner is operated in a cooling mode, the refrigerant compressed in the compressor is condensed in the outdoor heat exchanger and then compressed into an expansion device, and the refrigerant expanded in the expansion device heat exchanges with the indoor air in the indoor heat exchanger. The cold air is discharged to the indoor space to cool the indoor space.

At this time, the outdoor heat exchanger functions as a condenser, and the indoor heat exchanger functions as an evaporator.

Since the heating mode of the air conditioner is almost similar to the above-described cooling mode and the flow direction of the refrigerant, a description thereof will be omitted below.

However, when the air conditioner is operated in a heating mode, the indoor heat exchanger functions as a condenser and the outdoor heat exchanger functions as an evaporator.

On the other hand, when the air conditioner is operated in the cooling mode, the refrigerant passing through the outdoor heat exchanger is introduced into the expansion device in a two-phase state (two phase), when the refrigerant is passed through the indoor heat exchanger in the two-phase state is also a two-phase state To the expansion device.

However, when the refrigerant in the two-phase state is introduced into the expansion device, there is a problem that the noise is largely generated by the uneven pressure difference of the refrigerant when the refrigerant is expanded in the expansion device.

In addition, when the refrigerant in the two-phase state flows along the refrigerant pipe, there is a problem in that the flow noise of the refrigerant increases due to uneven pressure distribution of the refrigerant pipe.

In order to solve the above problems, an object of the present invention is to uniformize the state of the refrigerant flowing into and out of the expansion device and to reduce the noise caused by the refrigerant by using a device having a noise reduction effect.

1 is a schematic view showing a cooling and heating system of an air conditioner according to the present invention.

Figure 2 is a sectional view showing the main part of the internal structure of the noise reduction device applied to the heating and cooling system of Figure 1;

Explanation of symbols on the main parts of the drawings

10: outdoor unit 11: compressor

12: four-way valve 13: outdoor heat exchanger

13a: outdoor fan 14: accumulator

20: indoor unit 21: expansion device

22: indoor heat exchanger 22a: indoor fan

30: noise reduction device 30a: first noise reduction device

30b: second noise reduction device 31: the body

32: screen 33: tube

33a: refrigerant passage hole 34: buffer space

In order to achieve the above object, the present invention provides an air conditioner, the body is provided with at least one or more refrigerant pipes connected to the expansion device installed in the indoor unit to form a refrigerant flow path so that the refrigerant flows into the indoor heat exchanger of the indoor unit; A screen installed in the inner space of the body and having a mesh formed to not only filter impurities mixed in the refrigerant, but also to achieve a uniform state while passing the refrigerant in a two phase; An outer circumferential surface is spaced apart from the inner circumferential surface of the body by a predetermined distance to form a buffer space portion, and a noise reduction device including a cylindrical tube having a refrigerant flow inlet hole formed therein to reduce noise as the refrigerant flowing in the center flows into the buffer space portion. Provided is a cooling and heating system of an air conditioner, characterized in that installed.

Hereinafter, a first embodiment of an air conditioner air conditioning system according to the present invention will be described with reference to FIGS. 1 and 2.

1 is a configuration diagram schematically showing a cooling and heating system of the air conditioner according to the present invention, Figure 2 is a cross-sectional view showing the main structure of the noise reduction device applied to the cooling and heating system of FIG.

Referring to FIG. 1, the air conditioning and heating system of the air conditioner includes an outdoor unit 10 and an indoor unit 20.

The outdoor unit 10 includes a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, and an accumulator 14, and the indoor unit 20 includes an expansion device 21 and an indoor heat exchanger 22. And a noise reduction device 30 is installed.

In this case, an outdoor fan 13a and an indoor fan 22a are respectively installed near the outdoor heat exchanger 13 and the indoor heat exchanger 22, and at least one refrigerant pipe connected to the expansion device 21 of the indoor unit is provided. The above noise reduction device 30 is provided.

A noise reduction device of such an air conditioner will be described with reference to FIG. 2.

The noise reduction device 30 is installed in at least one or more refrigerant pipes connected to the expansion device 21 installed in the indoor unit 20, the refrigerant flow path so that the refrigerant flows in and out of the indoor heat exchanger 22 of the indoor unit 20. A body 31 for forming; Screen 32 is installed in the interior space of the body 31, the mesh is formed to not only filter the impurities mixed in the refrigerant, but also to the uniform state while passing the refrigerant of the two phase (two phase) and ; The outer circumferential surface is installed to be spaced apart from the inner circumferential surface of the body 31 by a predetermined distance to form a buffer space portion 34, and the refrigerant passage hole to reduce the noise as the refrigerant flowing in the center flows into the buffer space 34 It consists of the cylindrical tube 33 in which 33a was formed.

The noise reduction device 30 is installed in the refrigerant inlet and discharge side refrigerant pipes of the expansion device 21, respectively.

That is, the noise reduction device 30 includes a first noise reduction device 30a installed between the outdoor heat exchanger 13 and the expansion device 21 as shown in FIG. 1, the expansion device 21, and the indoor heat exchanger. It consists of the 2nd noise reduction apparatus 30b provided between (22).

At this time, the tube 33 of the first and second noise reduction device (30a, 30b) is formed at both ends is larger than the outer diameter of the center, the both ends are installed to match the inner surface of the body 31, the screen ( 32 is installed at one end of the noise reduction device main body 31 located close to the expansion device 21.

When the air conditioner is operated in a cooling mode, the refrigerant compressed by the compressor 11 flows into the outdoor heat exchanger 13 by controlling the four-way valve 12, and the refrigerant flows in the outdoor heat exchanger 13. It condenses in a liquid state or a two-phase state while exchanging heat with outside air.

The condensed refrigerant passes through the tube 33 of the first noise reduction device 30a and becomes uniform by the action of the buffer space 34. The refrigerant passes through the screen 32 and is more uniform. It enters into the expansion device 21 in a state.

The refrigerant discharged from the expansion device 21 passes through the tube 33 and the screen 32 of the second noise reduction device 30b to uniformly discharge the refrigerant discharged from the expansion device to reduce the flow noise of the refrigerant.

As such, the noise reduction apparatuses 30a and 30b reduce the flow noise of the refrigerant according to the characteristics of the punching resonator caused by the action of the buffer space 34.

In addition, when the air conditioner is operated in a heating mode, the two-phase flow refrigerant discharged from the indoor heat exchanger 22 passes through the tube 33 of the second noise reduction device 30b in a uniform state. The uniform coolant is introduced into the expansion device 21 in a more uniform state while passing through the screen 32.

The refrigerant expanded by the expansion device passes through the screen 32 and the tube 33 of the first noise reduction device 30a and becomes a refrigerant in a uniform state and flows into the outdoor heat exchanger 13.

Next, a second embodiment of the air conditioning system of the air conditioner according to the present invention will be described.

The air conditioning system of the air conditioner is connected to a refrigerant pipe of the compressor 11 and the outdoor heat exchanger 13 of the outdoor unit 10 and the outdoor unit 10 in which the compressor 11 and the outdoor heat exchanger 13 are installed. The indoor heat exchanger 22 and the expansion device 21 and at least one indoor unit 20 is installed so that the noise reduction device 30 is installed.

In this case, the noise reduction device 30 is provided with an indoor heat exchanger 22 and an expansion device 21 to be connected to the refrigerant pipes of the compressor 11 and the outdoor heat exchanger 13, and connected to the expansion device 21. At least one or more coolant pipes are installed in the body 31 and the inner space of the body 31 to form a coolant flow path such that the coolant flows in and out of the indoor heat exchanger 22 of the indoor unit 20. In addition to filtering the mixed impurities, the screen 32 having a mesh is formed so that the refrigerant in a two-phase state passes and the outer circumferential surface is spaced apart from the inner circumferential surface of the body 31 by a predetermined distance. Noise reduction consisting of a cylindrical tube 33 having a coolant passage hole 33a installed to form a buffer space portion 34 and reduce noise as the coolant flowing in the center flows into the buffer space portion 34. The device 30 is installed.

The noise reduction device 30 is installed in the refrigerant inlet and discharge side refrigerant pipes of the expansion device 21, respectively.

That is, the noise reduction device 30 includes a first noise reduction device 30a installed between the outdoor heat exchanger 13 and the expansion device 21 as shown in FIG. 2, the expansion device 21, and the indoor heat exchanger. It consists of the 2nd noise reduction apparatus 30b provided between (22).

At this time, the tube 33 of the first and second noise reduction device (30a, 30b) is formed at both ends is larger than the outer diameter of the center, the both ends are installed to match the inner surface of the body 31, the screen ( 32 is installed at one end of the noise reduction device 30 located close to the expansion device (21).

In other words, the first and second embodiments of the present invention reduce the expansion noise of the refrigerant generated in the expansion device by making the refrigerant flowing into the expansion device uniform in one noise reduction device, and the expansion refrigerant is uniform in the other silencer. After the flow of the refrigerant pipe to reduce the flow noise of the refrigerant.

Referring to the operation of the air conditioning system of the air conditioner as follows.

The air conditioner may be operated in a cooling mode or a heating mode as the refrigerant flows in one or the other direction.

First, a case in which the air conditioner is operated in a cooling mode will be described.

The refrigerant compressed by the compressor 11 is pumped to the outdoor heat exchanger 13, and the refrigerant introduced into the outdoor heat exchanger 13 is condensed into the refrigerant in a two-phase state as the outdoor fan 13a is rotated.

The two phase refrigerant is brought into a uniform state after flowing into the first noise reduction device 30a provided between the outdoor heat exchanger 13 and the expansion device 21.

That is, the refrigerant in the two-phase state introduced into the first noise reduction device 30a becomes mostly uniform by the action of the buffer space 34 while passing through the tube 33, and the uniform refrigerant is the tube. It passes into 33 and becomes a more uniform state.

When the homogenous refrigerant is expanded in the expansion device 21, the uniform refrigerant maintains substantially the same expansion pressure, so in the expansion device 21, noise is significantly reduced as compared with the expansion of the non-uniform two-phase refrigerant. do.

Since the expanded refrigerant is uniform through the tube 33 and the screen 32 of the second noise reduction device 30b, noise generated when the refrigerant flows can be reduced.

The refrigerant introduced into the indoor heat exchanger (22) is heat exchanged with the indoor air as the indoor fan (22a) is rotated to become a low temperature state, and the cold air heat exchanged with the indoor heat exchanger (22) is discharged into the indoor space to provide an indoor space. Cool it down.

The heat-exchanged liquid refrigerant is reintroduced into the compressor (11) via the accumulator (14).

Next, a case in which the air conditioning system of the air conditioner is operated in the heating mode will be described.

The refrigerant compressed by the high temperature and high pressure in the compressor (11) is pumped to the indoor heat exchanger (22), and the refrigerant of the indoor heat exchanger (22) is heat exchanged with the indoor air as the indoor fan (22a) is rotated so as to be in a two-phase state. To condense.

The two-phase refrigerant flows into the expansion device 21 through the second noise reduction device 30b, and the refrigerant of the expansion device 21 expands while being in a two-phase or liquid state at low temperature and low pressure. Is switched to the refrigerant.

At this time, the refrigerant in the two-phase state is made uniform by the punching-type resonator characteristic of the buffer space 34 while passing through the tube 33 of the second noise reduction device 30b, and the refrigerant is screen 32 It becomes more uniform and then flows into the expansion device (21).

In the expansion device 21, noise is generated by expanding the uniformed refrigerant, and this noise is considerably smaller than when the refrigerant in the two-phase state is expanded in the expansion device 21.

The refrigerant thus expanded makes the refrigerant discharged from the expansion device uniform through the tube 33 and the screen 32 of the first noise reduction device 30a.

As described above, the uniform noise flows in the refrigerant pipe by the first noise reduction device 30a, thereby resolving the local pressure difference in the cold pipe, and the refrigerant flow generated when the refrigerant flows due to the resolution of the pressure difference. Noise can be reduced.

Subsequently, as the outdoor fan 13a is rotated, the refrigerant of the outdoor heat exchanger 13 is heat-exchanged with the outside air to become a low temperature state, and the cold air heat-exchanged with the outdoor heat exchanger 13 is discharged to the outside. The liquid refrigerant of the heat exchanger passes through the accumulator 14 and then flows back into the compressor 11.

As described above, the air conditioning and heating system of the air conditioner according to the present invention forms the refrigerant flowing into the expansion device in a uniform state, and applies the noise type filter applied with the two-stage expansion effect and the puncturing resonator characteristics, thereby expanding the expansion device. It is possible to reduce the expansion noise of the refrigerant generated when the refrigerant is expanded and the flow noise of the refrigerant generated when the refrigerant pipe flows.

As described above, the effect of the air conditioning system of the air conditioner according to the present invention is as follows.

First, in this system, noise reduction strainer is applied to the screen to allow the flow of refrigerant in a non-uniform two-phase state into the expansion device in a uniform state in addition to the filtration function, which is a basic function, to reduce the noise generated when the refrigerant is expanded. It was made.

Second, the refrigerant expanded in the expansion device also passes through the noise reduction device to make the refrigerant in a non-uniform two-phase state uniform, thereby resolving the local pressure difference in the refrigerant pipe, thereby reducing the flow noise of the refrigerant due to the pressure difference. It was made.

Third, it is possible to improve the thermal efficiency of the air conditioner by improving the flow performance of the refrigerant by eliminating the pressure difference in the refrigerant pipe.

Fourth, the noise reduction filter is composed of a combination of two stages of a simple expandable silencer structure and a perforated resonator characteristic, which has the advantage of eliminating or reducing various frequency noise sources, and reducing refrigerant flow noise. Has valid properties.

Fifth, it is designed to combine the filtering function and noise reduction function has the advantage of reducing the installation space of the indoor unit.

Claims (6)

In air conditioners, A body which is installed in at least one refrigerant pipe connected to the expansion device installed in the indoor unit to form a refrigerant flow path so that the refrigerant flows in and out of the indoor heat exchanger of the indoor unit; A screen having a filtration function installed in the inner space of the body and having a mesh formed so as to be in a uniform state while the refrigerant in two phases passes; An outer circumferential surface is spaced apart from the inner circumferential surface of the body by a predetermined distance to form a buffer space portion, and a noise reduction device including a cylindrical tube having a refrigerant flow inlet hole formed therein to reduce noise as the refrigerant flowing in the center flows into the buffer space portion. Air conditioning system, characterized in that installed air conditioning. The method of claim 1, The noise reduction device is a cooling and heating system of the air conditioner, characterized in that installed in the refrigerant inlet and discharge side refrigerant pipe of the expansion device, respectively. The method of claim 1, The tube is formed at both ends larger than the outer diameter of the central portion, the both ends are fitted to the inner surface of the body, And the screen is installed at one end of the main body of the noise reduction device located close to the expansion device. In air conditioners, An outdoor unit in which a compressor and an outdoor heat exchanger are installed; An indoor heat exchanger and an expansion device are installed to be connected to the refrigerant pipes of the compressor and the outdoor heat exchanger of the outdoor unit, and at least one of the refrigerant paths is installed in the refrigerant pipe connected to the expansion device to allow the refrigerant to flow in and out of the indoor heat exchanger of the indoor unit. Body which forms a screen having a filtering function in which a mesh is formed so as to be installed in the inner space of the body and in a uniform state while the two-phase (two phase) refrigerant passes, the outer peripheral surface is the inner peripheral surface of the body and At least one indoor unit having a noise reduction device formed of a cylindrical tube formed with a refrigerant inlet hole to reduce noise as the refrigerant flows into the buffer space to form a buffer space part spaced apart from the predetermined distance. : Air conditioning system, characterized in that consisting of. The method of claim 4, wherein The noise reduction device is a cooling and heating system of the air conditioner, characterized in that installed in the refrigerant inlet and discharge side refrigerant pipe of the expansion device, respectively. The method of claim 4, wherein Both ends of the tube of the noise reduction device is formed to be larger than the outer diameter of the center, the both ends are installed to match the inner surface of the body, And the screen is installed at one end of the main body of the noise reduction device located close to the expansion device.