KR20190066552A - Air conditioner - Google Patents

Abstract

According to an aspect of the present invention, an air conditioner comprises: a compressor having an inlet into which a refrigerant is sucked, and an outlet to discharge a compressed refrigerant; a four-way valve switching a flow passage during cooling and heating operations, and including a valve body, a D port protruding from the valve body in a first direction to be connected to the outlet, and an S port protruding from the valve body in a second direction opposite to the first direction to be connected to the inlet; and a compressor pipe including a discharge pipe to connect the outlet and the D port, and a suction pipe to connect the inlet and the S port. One between the discharge pipe and the suction pipe has two curved portions and the other one has one curved portion. By such structure, pipe stress reliability is secured, material costs are reduced, and a compressor chamber can have a compact size.

Description

AIR CONDITIONER

The present invention relates to an air conditioner, and more particularly, to a piping structure of an air conditioner.

The air conditioner is equipped with a compressor, a condenser, an expansion valve, an evaporator, a blowing fan, and the like, and controls the temperature, humidity, air flow and the like of the room by using a refrigeration cycle. The air conditioner may include an indoor unit disposed indoors and an outdoor unit disposed outdoors.

The outdoor unit includes a compressor, an outdoor heat exchanger, a blower, an expansion mechanism, a four-way valve and the like, and the four-way valve switches the flow path in the cooling mode and the heating mode of the air conditioner.

The four-way valve has four ports, and each port is connected to the inlet and outlet of the compressor, the indoor heat exchanger and the outdoor heat exchanger through piping. In this structure, vibrations generated in the compressor are transmitted to the piping at the time of operation of the compressor, and vibration of the piping can be reduced or amplified depending on the length, shape, and density of the piping. Particularly, when the operating frequency of the compressor and the natural frequency of the pipe coincide with each other, resonance occurs and the vibration of the pipe increases greatly, and cracks may occur.

One aspect of the present invention discloses a piping structure of an air conditioner capable of reducing piping vibration and ensuring reliability of piping structure and an air conditioner having the same.

One aspect of the present invention discloses a piping structure of an air conditioner capable of minimizing a pipe length and reducing a material cost and making a compressor chamber compact, and an air conditioner having the pipe structure.

According to an aspect of the present invention, an air conditioner includes: a compressor having an inlet through which refrigerant is sucked and an outlet through which compressed refrigerant is discharged; a four-way valve for switching the flow path during cooling and heating operation; A four-way valve having a D port protruding in a first direction from the valve body to connect to the inlet and an S port protruding from the valve body in a second direction opposite to the first direction to be connected to the inlet; And a discharge pipe connecting the outlet and the D port, and a suction pipe connecting the inlet and the S port; Wherein one of the discharge pipe and the suction pipe has two curved portions and the other has one curved portion.

The center axis of the D port and the center axis of the S port may be included in a plane including the center axis of the inlet and the center axis of the outlet.

The center axis of the D port and the center axis of the S port may be formed to be inclined with respect to a plane including the center axis of the inlet and the center axis of the outlet.

The central axis of the inlet and the central axis of the outlet may be parallel to each other.

The central axis of the D port and the central axis of the S port may coincide with each other.

The D port and the S port may protrude in a direction perpendicular to the axial direction of the valve body. The D port and the S port may protrude from the center of the valve body have.

The four-way valve may be disposed at an angle so that the D port is positioned higher than the S port.

The discharge pipe includes a first piping straight portion coupled to the D port, a second piping straight portion coupled to the outlet, and a third piping straight line extending between the first piping straight portion and the second piping straight portion, A first piping curved portion connecting the first pipe straight portion and the third pipe straight portion and a second pipe curved portion connecting the second pipe straight portion and the third pipe straight portion.

The suction pipe may include a first pipe straight portion coupled to the S port, a second pipe straight portion coupled to the inlet, and a pipe curved portion connecting the first pipe straight portion and the second pipe straight portion. have.

The four-way valve may be disposed at an angle so that the S port is positioned higher than the D port.

And the S port and the D port may be located at corresponding heights.

According to another aspect of the present invention, there is provided an air conditioner comprising: a compressor having an inlet through which a refrigerant is sucked and an outlet through which compressed refrigerant is discharged; an outdoor heat exchanger and an indoor heat exchanger; And a four-way valve for switching a flow path during cooling and heating operation, the four-way valve comprising: a D port connected to the outlet; an S port connected to the inlet; a C port connected to the outdoor heat exchanger; A four-way valve having a port; Wherein the D port is directly connected to the outlet or the S port is directly connected to the inlet.

The S port may be inserted and coupled to the inlet.

Wherein the four-way valve includes a valve body having a cylindrical shape, the D port protruding from the valve body in a first direction perpendicular to the axial direction of the valve body, A second port rectilinear portion coupled to the inlet, and a port curvilinear portion connecting the first port rectilinear portion and the second port rectilinear portion to each other, .

The angle between the first port linear portion and the second port linear portion may be 20 to 90 degrees.

The air conditioner further includes an outdoor heat exchanger pipe connecting the outdoor heat exchanger and the C port. The C port includes a fourth port straight portion parallel to the first port rectilinear portion, and a fourth port straight portion coupled to the outdoor heat exchanger pipe And a second port curved portion connecting the fourth port rectilinear portion and the fifth port rectilinear portion and the second port curved portion may be bent in a direction opposite to the port curved portion.

Wherein the E port further comprises: a fourth port rectilinear portion parallel to the first port rectilinear portion; and a fifth port coupled to the indoor heat exchanger pipe, And a second port curved portion connecting the fourth port rectilinear portion and the fifth port rectilinear portion, and the second port curved portion may be bent in a direction opposite to the port curved portion.

The D port may be inserted into the outlet and coupled thereto.

Wherein the four-way valve includes a valve body having a cylindrical shape, the D port includes a first port rectilinear portion protruding from the valve body in a first direction perpendicular to an axial direction of the valve body, And a port curved portion connecting the first port rectilinear portion and the second port rectilinear portion.

According to the idea of the present invention, since the four-way valve is connected to or directly connected to the compressor, the compressor and the four-way valve can be substantially integrated and vibrated during operation of the compressor. As a result, the natural frequency of the pipe moves outside the operating range of the compressor, and the reliability of the piping stress can be ensured.

According to the idea of the present invention, the length of the piping is minimized, the material cost is reduced, and the compressor chamber can be made compact.

According to the idea of the present invention, it is possible to appropriately arrange the four-way valve so as not to interfere with the peripheral structures such as the control box and the reactor, while having the unified behavior characteristics of the four-way valve and the compressor.

1 and 2 are views showing a refrigerant circuit of an air conditioner according to a first embodiment of the present invention. Fig. 1 is a view showing a refrigerant circuit in a cooling operation, and Fig. 2 is a refrigerant circuit in a cooling operation.
3 is a perspective view illustrating a piping structure for connecting a compressor and a four-way valve according to a first embodiment of the present invention.
4 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a first embodiment of the present invention.
5 is a plan view showing a piping structure for connecting a compressor and a four-way valve according to a first embodiment of the present invention.
6 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a second embodiment of the present invention.
FIG. 7 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a third embodiment of the present invention; FIG.
8 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a fourth embodiment of the present invention.
9 is a perspective view showing a four-way valve according to a fourth embodiment of the present invention.
10 is a side view showing a four-way valve according to a fourth embodiment of the present invention;
11 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a fifth embodiment of the present invention.
12 is a perspective view showing a four-way valve according to a fifth embodiment of the present invention;
13 is a side view showing a four-way valve according to a fifth embodiment of the present invention;
14 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a sixth embodiment of the present invention.
15 is a perspective view showing a four-way valve according to a sixth embodiment of the present invention;
17 is a perspective view showing a pipe structure connecting a compressor and a four-way valve according to a seventh embodiment of the present invention.
18 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a seventh embodiment of the present invention.
19 is a plan view showing a piping structure for connecting a compressor and a four-way valve according to a seventh embodiment of the present invention.

It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims, It is to be understood that the invention is not limited thereto.

The singular expressions include plural expressions unless the context clearly dictates otherwise. It will be understood that, in the present specification, terms such as "comprise," "comprising," and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components or combinations thereof, Does not preclude the presence or addition of one or more other components, elements, components, components, or combinations thereof.

Although terms including ordinal such as first, second, etc. used in this specification can be used to describe various elements, the elements are not limited by the terms, Used for identification purposes only.

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

1 and 2 are views showing a refrigerant circuit of an air conditioner according to a first embodiment of the present invention. FIG. 1 shows a refrigerant circuit during a cooling operation, and FIG. 2 shows a refrigerant circuit during a cooling operation .

1 and 2, the air conditioner 1 includes an indoor unit 2, an outdoor unit 5, and a pipe connecting the indoor unit 2 and the outdoor unit 5.

The indoor unit 2 includes an indoor heat exchanger 3 and a blowing fan 4. The outdoor unit 5 includes an outdoor heat exchanger 6, a blowing fan 7, a compressor 10, (8), a four-way valve (20) and a service valve (9).

The compressor 10 may be constituted by one inverter compressor whose compression capacity is variable according to the input frequency or a combination of a plurality of constant speed compressors whose compression capacity is constant.

The compressor 10 may include a compressor main body 11 having a driving portion and a compression portion and an accumulator 12 for filtering the liquid refrigerant from the refrigerant directed toward the compressor main body 11. The compressor main body 11 may be a rotary compressor. The compressor 10 may include an inlet 15 through which the refrigerant is sucked and an outlet 16 through which the sucked refrigerant is compressed and discharged. The accumulator 12 can supply only the refrigerant in the liquid state to the compressor body 11, that is, the gaseous refrigerant in the refrigerant flowing into the compressor 10 from the four-way valve 20.

The indoor heat exchanger 3 acts as an evaporator in the cooling mode of FIG. 1 and can act as a condenser in the heating mode of FIG. The outdoor heat exchanger 6 acts as a condenser in the cooling mode of FIG. 1 and can act as an evaporator in the heating mode of FIG.

The expansion mechanism (8) can expand the refrigerant passing between the indoor heat exchanger (3) and the outdoor heat exchanger (6). The expansion mechanism (8) may be an electronic expansion valve whose opening value is variable so as to control the amount of refrigerant.

The service valve 9 can be installed in the pipe so as to connect the indoor pipe 2 side pipe and the outdoor pipe 5 side pipe and to fill the refrigerant.

 The four-way valve 20 can switch the flow path so as to change the flow of the refrigerant according to the user's selection. That is, the four-way valve 20 can guide the refrigerant discharged from the compressor 10 to the indoor heat exchanger 3 or the outdoor heat exchanger 6.

The four-way valve 20 may include a valve body 21 and four ports 25, 26, 27 and 28 protruding from the valve body 21. The four ports 25, 26, 27 and 28 include a D port 25 connected to the outlet 16 of the compressor 10 and an S port 25 connected to the inlet 15 of the compressor 10, A C port 27 connected to the outdoor heat exchanger 6 and an E port 28 connected to the indoor heat exchanger 3.

The four-way valve 20 is connected to the S port 26 and the E port 28 while the D port 25 and the C port 27 are connected in the cooling mode of FIG. 1, The D port 25 and the E port 28 are connected to each other and at the same time the S port 26 and the C port 27 are connected to each other so that the flow of the refrigerant can be switched.

That is, when the D port 25 and the C port 27 are connected and the S port 26 and the E port 28 are connected in the cooling mode of FIG. 1, the compressor 10 is connected to the four-way valve 20 The refrigerant flowing into the four-way valve 20 flows out to the compressor 1. The refrigerant flows into the outdoor heat exchanger 6 through the indoor heat exchanger 3,

When the D port 25 and the E port 28 are connected and the S port 26 and the C port 27 are connected at the time of the heating mode of FIG. 2, the four-way valve 20 Flows out to the indoor heat exchanger 3 and the refrigerant flowing into the four-way valve 20 from the outdoor heat exchanger 6 flows out to the compressor 1.

The piping of the air conditioner 1 is connected to the compressor piping 30 connecting the compressor 2 and the four-way valve 20 and the outdoor heat exchanger pipe 60 connecting the outdoor heat exchanger 6 and the four- And an indoor heat exchanger pipe 70 for connecting the indoor heat exchanger 3 and the four-way valve 20 to each other. The compressor piping 30 has a discharge piping 40 connecting the outlet 16 of the compressor 10 and the D port 25 of the four-way valve 20 and a discharge pipe 40 connecting the inlet 15 of the compressor 10 and the four- 20 connected to the S port 26 of the suction pipe 50. [

There is an attempt to increase the length of the compressor pipe 30 or to form the shape of a loop in order to alleviate vibration of the pipe when the compressor 10 is operated. However, when such a structure is applied, the material cost rises and the piping structure is complicated, The space of the yarn can be largely eroded. Further, since the inverter compressor having a variable operating region is mainly used for the air conditioner in recent years, it is difficult to design the natural frequency of the piping so as to deviate from the wide operating range of the inverter compressor.

The piping structure of the air conditioner according to the embodiment of the present invention is designed such that the four-way valve 20 is connected to or directly connected to the compressor 10 to move the natural frequency of the piping out of the operating range of the compressor 10, The material cost can be reduced, and the compressor chamber can be made compact. Hereinafter, the structure of the piping and the four-way valve 20 of the air conditioner according to the embodiment of the present invention will be described in detail.

3 is a perspective view illustrating a piping structure for connecting a compressor and a four-way valve according to a first embodiment of the present invention. 4 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a first embodiment of the present invention. 5 is a plan view showing a piping structure for connecting a compressor and a four-way valve according to a first embodiment of the present invention. 4 to 5, the outdoor heat exchanger pipe 60 and the indoor heat exchanger pipe 70 are omitted.

3 to 5, the compressor 10 is mounted on a support 18, and the compressor 10 can have a parallel upper surface 17. The compressor 10 has an inlet 15 through which the refrigerant is sucked and an outlet 16 through which the sucked refrigerant is compressed so that the inlet 15 and the outlet 16 are substantially perpendicular to the upper surface 17 It can have a protruding shape.

The center axis Li of the inlet 15 and the center axis Lo of the outlet 16 may be substantially parallel to each other. That is, the center axis Li of the inlet 15 and the center axis Lo of the outlet 16 may be included in one plane P substantially.

The four-way valve 20 may include a valve body 21 and four ports 25, 26, 27, 28 protruding from the valve body 21. The four ports 25, 26, 27 and 28 include a D port 25 connected to the outlet 16 of the compressor 10 and an S port 25 connected to the inlet 15 of the compressor 10, A C port 27 connected to the outdoor heat exchanger 6 and an E port 28 connected to the indoor heat exchanger 3.

The valve body 21 may have a cylindrical shape. The valve body 21 can be elongated in the axial direction A1. The D port 25 may protrude from the valve body 21 in a first direction perpendicular to the axial direction A1 of the valve body 21. [ The S port 26 may protrude from the valve body 21 in a second direction opposite to the first direction. Therefore, the center axis Ld of the D port 25 and the center axis Ls of the S port 26 can be located on the same straight line. That is, the center axis Ld of the D port 25 and the center axis Ls of the S port 26 can coincide with each other.

The length L1 between the D port 25 and the S port 26 may be greater than or equal to the horizontal distance L2 between the inlet 15 and the outlet 16. [

The D port 25 and the S port 26 can protrude from the center of the valve body 21 with respect to the axial direction A1 of the valve body 21. [ The C port 27 and the E port 28 may protrude from both sides of the S port 26. [ The C port 27 and the E port 28 may protrude in the same direction as the S port 26. [

The four-way valve 20 is configured such that the center axis Ld of the D port 25 and the center axis Ls of the S port 26 are aligned with the center axis Li of the inlet 15 and the center axis Lo of the outlet 16 (P).

The center axis Ld of the D port 25 of the four-way valve 20 and the center axis Ls of the S port 26 are positioned on the inlet 10 side of the compressor 10, 15 of the outlet 16 and the plane P of the outlet 16 including the central axis Lo thereof.

The center axis Ld of the D port 25 and the center axis Ls of the S port 26 are connected to the upper surface 17 of the compressor 10 such that the D port 25 is positioned higher than the S port 26. [ As shown in Fig. At this time, the discharge pipe 40 and the suction pipe 50 may be formed to have two or less curved portions, respectively.

In one example, the discharge pipe 40 may include two curved portions 44, 45. 4, the discharge pipe 40 includes a first pipe straight portion 41 coupled to the D port 25, a second pipe straight portion 42 coupled to the outlet 16, A third piping straight portion 43 extending between the first piping straight portion 41 and the second piping straight portion 42 and a third piping straight portion 43 extending between the first piping straight portion 41 and the third piping straight portion 43, And a second piping curved portion 45 connecting the second piping straight portion 42 and the third piping straight portion 43 to each other.

At this time, it is preferable that the angle? 1 between the first pipe straight portion 41 and the upper surface 17 of the compressor is in the range of 20 to 70 degrees so as to facilitate the flow of the refrigerant.

However, unlike the present embodiment, the discharge pipe may have one curved portion (see FIG. 8, etc.).

Further, the suction pipe 50 may be formed so as to have one curved portion 53. 4, the suction pipe 50 includes a first pipe straight portion 51 coupled to the S port 26, a second pipe straight portion 52 coupled to the inlet 15, And a pipe curved portion 53 connecting the first pipe straight portion 51 and the second pipe straight portion 52.

The first pipe straight portion 41 of the discharge pipe 40 and the first pipe straight portion 51 of the suction pipe 50 have the same inclination with each other and therefore the first pipe straight portion 51 of the suction pipe 50 1) of the upper surface 17 of the compressor of the compressor may be 20 to 70 degrees.

As described above, when the four-way valve 20 is positioned so that the center axis Ld of the D port 25 and the center axis Ls of the S port 26 are aligned with the center axis Li of the inlet 15 and the center axis Ls of the outlet 16 And the four-way valve 20 is disposed on the upper surface 17 of the compressor 10 such that the D port 25 is positioned higher than the S port 26 And the discharge piping 40 and the suction piping 50 are formed so as to have two or less curved portions so that the compressor piping 40 and 50 connecting the four-way valve 20 and the compressor 10 The length can be minimized and the four-way valve 20 can be close to the compressor 10. [ Further, since the length of the compressor piping 40, 50 is minimized and the four-way valve 20 is close to the compressor 10, the natural frequency of the piping has a value higher than the frequency of the operation region of the compressor 10, It may not occur.

6 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a second embodiment of the present invention. However, for convenience of explanation, the outdoor heat exchanger piping and the indoor heat exchanger piping are omitted.

The same reference numerals are assigned to the same components as those of the above-described embodiment, and description thereof may be omitted.

6, the four-way valve 20 is disposed between the center axis Ld of the D port 25 and the center axis Ld of the S port 26. In the piping structure of the compressor and the four-way valve according to the second embodiment of the present invention, Is arranged so as to be included in the plane P including the center axis Li of the inlet 15 and the center axis Lo of the outlet 16 is the same as the first embodiment described above.

However, unlike the first embodiment, the four-way valve 20 is connected to the D port (not shown) in accordance with the height difference between the compressor main body 11 and the accumulator 12 of the compressor 10 or the space arrangement inside the outdoor unit 5 25 and the center axis Ls of the S port 26 are formed to be inclined with respect to the upper surface 17 of the compressor 10 such that the S port 26 is positioned higher than the D port 25 .

The discharge pipe 240 may include two curved portions 244 and 245. The discharge pipe 240 includes a first pipe straight portion 241 coupled to the D port 25, a second pipe straight portion 242 coupled to the outlet 16, a first pipe straight portion 241, A third piping straight portion 243 extending between the second piping straight portion 242 and a first piping curved portion 244 connecting the first piping straight portion 241 and the third piping straight portion 243 And a second piping curved portion 245 connecting the second piping straight portion 242 and the third piping straight portion 243.

At this time, it is preferable that the angle? 1 between the first pipe straight portion 241 and the upper surface 17 of the compressor is in the range of 20 to 70 degrees so as to facilitate the flow of the refrigerant.

The suction pipe 250 may include one curved portion 253. The suction pipe 250 includes a first pipe straight portion 251 coupled to the S port 26, a second pipe straight portion 252 coupled to the inlet 15, a first pipe straight portion 251, And a piping curved portion 253 connecting the second pipe straight portion 252.

7 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a third embodiment of the present invention. However, for convenience of explanation, the outdoor heat exchanger piping and the indoor heat exchanger piping are omitted.

The same reference numerals are assigned to the same components as those of the above-described embodiment, and description thereof may be omitted.

In the piping structure of the compressor and the four-way valve according to the third embodiment of the present invention, the four-way valve 20 connects the center axis Ld of the D port 25 and the center axis Ls of the S port 26 to the inlet 15 are disposed so as to be included in the plane P including the center axis Li of the outlet 16 and the center axis Lo of the outlet 16 are the same as those of the first embodiment described above.

However, unlike the above-described embodiments, depending on the height difference between the compressor body 11 and the accumulator 12 of the compressor 10 or the space arrangement inside the outdoor unit 5, the center axis Ld of the D port 25 And the center axis Ls of the S port 26 are formed parallel to the upper surface 17 of the compressor 10 and the S port 26 and the D port 25 are located at a height corresponding to each other have.

The discharge pipe 340 may include two curved portions 344 and 345. The discharge pipe 340 includes a first pipe straight portion 341 coupled to the D port 25, a second pipe straight portion 342 coupled to the outlet 16, a first pipe straight portion 341, A third piping straight portion 343 extending between the second piping straight portion 342 and a first piping straight portion 344 connecting the first piping straight portion 341 and the third piping straight portion 343, And a second piping curved portion 345 connecting the second piping straight portion 342 and the third piping straight portion 343.

The suction pipe 350 may include one curved portion 353. The suction pipe 350 includes a first pipe straight portion 351 coupled to the S port 26, a second pipe straight portion 352 coupled to the inlet 15, a first pipe straight portion 351, And a piping curved portion 353 connecting the second pipe straight portion 352.

8 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a fourth embodiment of the present invention. 9 is a perspective view showing a four-way valve according to a fourth embodiment of the present invention. 10 is a side view showing a four-way valve according to a fourth embodiment of the present invention. However, the outdoor heat exchanger piping and the indoor heat exchanger piping are omitted for convenience of explanation in FIG.

The same reference numerals are assigned to the same components as those of the above-described embodiment, and description thereof may be omitted.

8 to 10, the S port 426 of the four-way valve 420 may be directly connected to the inlet 15, unlike the above-described embodiments.

That is, the four-way valve 420 may include a valve body 421 and four ports 425, 426, 427 and 428 protruding from the valve body 421. The four ports 425, 426, 427 and 428 include a D port 425 connected to the outlet 16 of the compressor 10 and an S port 425 connected to the inlet 15 of the compressor 10, A C port 427 connected to the outdoor heat exchanger 6 and an E port 428 connected to the indoor heat exchanger 3.

The S port 426 includes a first port rectilinear section 426a protruding from the valve body 421, a second port rectilinear section 426b provided to be coupled to the inlet 15, a first port rectilinear section 426a, And a port curved portion 426c connecting the second port rectilinear portion 426b. The angle? 3 between the first port rectilinear section 426a and the second port linear section 426c may be 20 to 90 degrees. The second port rectilinear section 426b can be inserted into the inlet 15 and coupled through welding or the like. The second port rectilinear section 426b may be provided at the end thereof with an expansion section whose radius of the outer circumferential surface is enlarged to facilitate coupling with the inlet 15. [

11 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a fifth embodiment of the present invention. 12 is a perspective view showing a four-way valve according to a fifth embodiment of the present invention. 13 is a side view showing a four-way valve according to a fifth embodiment of the present invention. However, the outdoor heat exchanger piping and the indoor heat exchanger piping are omitted for convenience of explanation in FIG.

The same reference numerals are assigned to the same components as those of the above-described embodiment, and description thereof may be omitted.

11 to 13, the S port 526 of the four-way valve 520 is bent so as to be directly connected to the inlet 15, and the C port 527 and the E port 528 of the four- May be bent in the opposite direction to the S port 526. [

13, the S port 526 is bent downward by a predetermined angle? 4 with respect to the center axis Ld of the D port 525, and the C port 527 and the E port 528 may be bent upward at an angle? 4. This is to minimize the interference of the ports at the time of welding the pipes, thereby facilitating the welding.

The four-way valve 520 may include a valve body 521 and four ports 525, 526, 527, 528 protruding from the valve body 521. The four ports 525, 526, 527 and 528 include a D port 525 connected to the outlet 16 of the compressor 10 and an S port 525 connected to the inlet 15 of the compressor 10, A C port 527 connected to the outdoor heat exchanger 6 and an E port 528 connected to the indoor heat exchanger 3.

The S port 526 includes a first port rectilinear section 526a protruding from the valve body 521, a second port rectilinear section 526b provided to be coupled to the inlet 15, a first port rectilinear section 526a And a port curved portion 526c connecting the second port rectilinear portion 526b. The second port rectilinear section 526b can be inserted into the inlet 15 and coupled through welding or the like.

The C port 527 has a fourth port rectilinear section 527a parallel to the first port rectilinear section 526a, a fifth port rectilinear section 527b coupled to the outdoor heat exchanger piping 60, And a second port curved portion 527c connecting the 4-port rectilinear section 527a and the fifth port rectilinear section 527b. The second port curved portion 527c may be bent in the opposite direction to the port curved portion 526c.

The E port 528 includes a fourth port rectilinear section 528a parallel to the first port linear section 526a, a fifth port rectilinear section 528b coupled to the indoor heat exchanger piping 70, And a second port curved portion 528c connecting the fourth port rectilinear portion 528a and the fifth port rectilinear portion 528b. The second port curved portion 528c may be bent in a direction opposite to the port curved portion 526c.

FIG. 14 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a sixth embodiment of the present invention. 15 is a perspective view showing a four-way valve according to a sixth embodiment of the present invention. However, the outdoor heat exchanger piping and the indoor heat exchanger piping are omitted for convenience of explanation in FIG.

The same reference numerals are assigned to the same components as those of the above-described embodiment, and description thereof may be omitted.

14 and 15, the D port 625 of the four-way valve 620 may be formed to be directly connected to the outlet 16.

That is, the four-way valve 620 may include a valve body 621 and four ports 625, 626, 627, and 628 protruding from the valve body 621. The four ports 625, 626, 627 and 628 include a D port 625 connected to the outlet 16 of the compressor 10 and an S port 625 connected to the inlet 15 of the compressor 10, A C port 627 connected to the outdoor heat exchanger 6 and an E port 628 connected to the indoor heat exchanger 2.

The D port 625 includes a first port rectilinear section 625a projecting from the valve body 621, a second port rectilinear section 625b provided to be coupled to the outlet 16, a first port rectilinear section 625a And a port curved portion 625c connecting the second port linear portion 625b and the second port rectilinear portion 625b. The second port rectilinear section 625b may be provided at the end thereof with an expansion section having a radius of the outer circumferential surface expanded to facilitate coupling with the outlet 16. [

The second port rectilinear section 626b can be inserted into the outlet 16 and coupled via welding or the like.

14 and 15 show that the D port 625 is directly connected to the outlet 16 and the S port 626 is connected directly to the inlet 15. However, And the S port 626 may be connected to the inlet 15 through a pipe.

17 is a perspective view illustrating a piping structure for connecting a compressor and a four-way valve according to a seventh embodiment of the present invention. 18 is a side view showing a piping structure for connecting a compressor and a four-way valve according to a seventh embodiment of the present invention. 19 is a plan view showing a piping structure for connecting a compressor and a four-way valve according to a seventh embodiment of the present invention.

17 to 19, a piping structure for connecting a compressor and a four-way valve according to another embodiment of the present invention will be described. The same reference numerals are assigned to the same components as those of the above-described embodiment, and description thereof may be omitted.

The piping structure for connecting the compressor and the four-way valve according to the seventh embodiment of the present invention is the same as the piping structure of FIG. 3, except that the center axis Ld of the D port 25, The center axis Ls may be formed to be inclined with respect to the plane P including the center axis Li of the inlet 15 and the center axis Lo of the outlet 16. [

That is, the center axis Ld of the D port 25 and the center axis Ls of the S port 26 include the center axis Li of the inlet 15 and the center axis Lo of the outlet 16 The four-way valve 20 may be inclined so as not to be included in the plane P. The discharge pipe 740 may include two curved portions 744 and 745. That is, the discharge pipe 740 includes a first pipe straight portion 741 coupled to the D port 25, a second pipe straight portion 742 coupled to the outlet 16, a first pipe straight portion 74 A third pipe straight portion 743 extending between the first pipe straight portion 741 and the second pipe straight portion 42 and a third pipe straight portion 743 extending between the second pipe straight portion 42 and the first pipe straight portion 743, And a second piping curved portion 745 connecting the second piping straight portion 742 and the third piping straight portion 743.

The suction pipe 750 may be formed to have one curved portion 753. That is, the suction pipe 750 includes a first pipe straight portion 751 coupled to the S port 26, a second pipe straight portion 752 coupled to the inlet 15, a first pipe straight portion 751 And a pipe line curve portion 753 connecting the second pipe straight line portion 752 with each other.

The length of the compressor pipes 740 and 750 connecting the four-way valve 20 and the compressor 10 can be minimized and the four-way valve 20 can be positioned close to the compressor 10. In addition, since the length of the compressor pipes 740 and 750 is minimized and the four-way valve 20 is close to the compressor 10, the natural frequency of the pipe becomes higher than the frequency of the operation region of the compressor 10, It may not occur. That is, the behavior characteristics in which the compressor 10 and the four-way valve 20 are integrated can be exhibited.

The central axis Ld of the D port 25 and the center axis Ls of the S port 26 include the center axis Li of the inlet 15 and the center axis Lo of the outlet 16 The four-way valve 20 is inclined so as not to be included in the plane P, so that the integrated behavioral characteristics of the four-way valve 20 and the compressor 20 can be maintained and interference with the surrounding structures such as the control box and the reactor can be avoided .

Although the technical idea of the present invention has been described above with reference to specific embodiments, the scope of rights of the present invention is not limited to these embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.

1: air conditioner 2: indoor unit
3: outdoor unit 4: indoor heat exchanger
5: blower fan 6: expansion device
8, 9: Service valve 10: Compressor
11: compressor body 12: accumulator
15: inlet 16: outlet
20: Four-way valve 21: Valve body
25: D port 26: S port
27: C port 28: E port
30: Compressor piping 40: Discharge piping
50: Suction piping 60: Outdoor heat exchanger piping
70: Indoor heat exchanger piping

Claims (20)

A compressor having an inlet through which the refrigerant is sucked and an outlet through which the compressed refrigerant is discharged;
A four-way valve for switching a flow path during cooling and heating operation, comprising: a valve body; a D port protruding from the valve body in a first direction to be connected to the outlet; A four-way valve having an S port protruding in a second direction opposite to the first direction; And
A discharge pipe connecting the outlet and the D port, and a suction pipe connecting the inlet and the S port; / RTI >
Wherein one of the discharge pipe and the suction pipe has two curved portions and the other has one curved portion. The method according to claim 1,
Wherein the center axis of the D port and the center axis of the S port are included in a plane including a center axis of the inlet and a center axis of the outlet. The method according to claim 1,
Wherein the central axis of the D port and the central axis of the S port are formed to be inclined with respect to a plane including the central axis of the inlet and the central axis of the outlet. The method according to claim 1,
Wherein the central axis of the inlet and the central axis of the outlet are parallel to each other. The method according to claim 1,
And the center axis of the D port and the center axis of the S port coincide with each other. The method according to claim 1,
Wherein the valve body has a cylindrical shape,
Wherein the D port and the S port are protruded in a direction perpendicular to an axial direction of the valve body. 6. The method of claim 5,
Wherein the D port and the S port protrude from a central portion of the valve body. The method according to claim 1,
Wherein the four-way valve is disposed in an inclined manner such that the D port is positioned higher than the S port. The method according to claim 1,
The discharge pipe includes a first piping straight portion coupled to the D port, a second piping straight portion coupled to the outlet, and a third piping straight line extending between the first piping straight portion and the second piping straight portion, And a second piping curved portion connecting the first piping straight portion and the third piping straight portion and the second piping straight portion connecting the second piping straight portion and the third piping straight portion, . The method according to claim 1,
Wherein the suction pipe includes a first pipe straight portion coupled to the S port, a second pipe straight portion coupled to the inlet, and a pipe curved portion connecting the first pipe straight portion and the second pipe straight portion, Harmonics. The method according to claim 1,
And wherein the four-way valve is disposed at an inclination so that the S port is positioned higher than the D port. The method according to claim 1,
Wherein the S port and the D port are located at a height corresponding to each other. A compressor having an inlet through which the refrigerant is sucked and an outlet through which the compressed refrigerant is discharged;
An outdoor heat exchanger and an indoor heat exchanger; And
A four-way valve for switching a flow path during cooling and heating operation, comprising: a D port connected to the outlet; an S port connected to the inlet; a C port connected to the outdoor heat exchanger; and an E port connected to the indoor heat exchanger. Respectively; Lt; / RTI >
Wherein the D port is directly connected to the outlet or the S port is directly connected to the inlet. 14. The method of claim 13,
And the S port is inserted into the inlet. 15. The method of claim 14,
Wherein the four-way valve includes a valve body having a cylindrical shape,
The D port protrudes from the valve body in a first direction perpendicular to the axial direction of the valve body,
Wherein the S port includes: a first port rectilinear portion protruding from the valve body in a second direction opposite to the first direction; a second port rectilinear portion coupled to the inlet; And a port curved portion connecting the port rectilinear portion. 16. The method of claim 15,
And an angle between the first port linear portion and the second port straight portion is 20 to 90 degrees. 16. The method of claim 15,
Further comprising an outdoor heat exchanger pipe connecting the outdoor heat exchanger and the C port,
The C port includes a fourth port rectilinear section parallel to the first port rectilinear section, a fifth port rectilinear section coupled to the outdoor heat exchanger piping, and a fourth port rectilinear section coupled to the fourth port rectilinear section and the fifth port rectilinear section A second port curved portion,
And the second port curved portion is bent in a direction opposite to the port curved portion. 16. The method of claim 15,
Further comprising an indoor heat exchanger pipe connecting the indoor heat exchanger and the E port,
The E port includes a fourth port rectilinear section parallel to the first port rectilinear section, a fifth port rectilinear section connected to the indoor heat exchanger piping, and a fourth port rectilinear section connected to the fourth port rectilinear section and the fifth port rectilinear section A second port curved portion,
And the second port curved portion is bent in a direction opposite to the port curved portion. 14. The method of claim 13,
And the D port is inserted into the outlet. 20. The method of claim 19,
Wherein the four-way valve includes a valve body having a cylindrical shape,
The D port includes a first port rectilinear portion protruding from the valve body in a first direction perpendicular to the axial direction of the valve body, a second port rectilinear portion coupled to the outlet, And a port curved portion connecting the second port rectilinear portion.

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