JP2015114060A - Accumulator and air conditioner equipped with the same - Google Patents

Abstract

An object of the present invention is to provide an accumulator that realizes a low profile and suppresses liquid refrigerant from flowing out from an outlet pipe, and an air conditioner including the accumulator. A container for storing refrigerant, an inlet pipe having one end side provided in the container and the other end side connected to a lateral side surface portion of the container, and one end side above the one end side of the inlet pipe in the container. Provided at the height position between one end side of the inlet pipe and one end side of the outlet pipe. And a closing plate provided. [Selection] Figure 1

Description

  The present invention relates to an accumulator and an air conditioner including the accumulator.

  The accumulator includes a container for storing refrigerant, an inlet pipe connected to the lateral side of the container, an outlet pipe connected to the upper part of the container, and an oil suction pipe used to return the refrigeration oil to the compressor side. Have been proposed (see, for example, Patent Document 1). In the technique described in Patent Document 1, the refrigerant that has flowed into the container from the inlet pipe is stored in the container, and the gas refrigerant mainly flows out from the outlet pipe. A plate-like member is provided in the oil suction pipe so that the liquid refrigerant stored in the container is suppressed from flowing into the outlet pipe.

JP 2000-356439 A (see, for example, claim 1 and FIG. 2)

  In the technique described in Patent Document 1, the inlet pipe is connected to the lateral side surface of the container, but the outlet pipe is connected to the upper part of the container. For this reason, a space for connecting the outlet pipe to the upper part of the container is required at the place where the accumulator is installed. That is, in the technique described in Patent Document 1, it is necessary to secure a height enough to route the outlet pipe at the place where the accumulator is installed. Many cases have been reported in which there is no space in the height direction when the air conditioner is mounted on a vehicle. That is, in a vehicle air conditioner, the space where the air conditioner is installed is easily limited, and a reduction in the height of the air conditioner is required. From this point of view, it may not be possible to secure the height of the outlet piping connected to the accumulator container.

  The flow rate of the refrigerant flowing into the container from the inlet pipe is as fast as about 10 m / s, for example. For this reason, the liquid refrigerant spreads not only on the inner side surface of the lateral side surface but also on the ceiling side of the container. For this reason, in the technique described in Patent Literature 1, there is a possibility that the liquid refrigerant having a fast flow that flows out from the inlet pipe flows directly into the outlet pipe. That is, since the technique described in Patent Document 1 is provided with a closing plate at the top of the liquid level, the refrigerant stored on the bottom side of the container can be prevented from flowing into the outlet pipe. There exists a subject that the liquid refrigerant | coolant which flowed out from piping rapidly flows in into outlet piping. When the liquid refrigerant flows into the outlet pipe, the liquid refrigerant is sent into the compressor and liquid compression occurs, and the durability of the compressor is reduced.

  The present invention has been made to solve the above-described problems, and achieves a low profile and an accumulator that suppresses liquid refrigerant from flowing out from an outlet pipe and an air conditioner including the accumulator The purpose is to provide.

  The accumulator according to the present invention includes a container for storing a refrigerant, an inlet pipe having one end side provided in the container, and the other end side connected to the lateral side surface of the container, and one end side from one end side of the inlet pipe in the container. Is provided on the upper side and the other end side is connected to the lateral side surface portion of the container, and the outlet pipe is provided in the container, and has a height between one end side of the inlet pipe and one end side of the outlet pipe. And a closing plate provided at this position.

  According to the accumulator which concerns on this invention, since it has the said structure, while achieving low profile, it can suppress that a liquid refrigerant flows out from outlet piping.

It is an outline block diagram of the accumulator which concerns on Embodiment 1 of this invention. It is a modification of the accumulator shown in FIG. It is a schematic block diagram of the accumulator which concerns on Embodiment 2 of this invention. It is a modification of the accumulator shown in FIG. It is a mimetic diagram of an air harmony device carried in a rail car and a rail car. It is an example of the refrigerant circuit structure of an air conditioning apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a schematic configuration example diagram of an accumulator 1 according to the first embodiment. 1A is a view of the accumulator 1 as viewed from above, and FIG. 1B is a longitudinal sectional view of the accumulator 1. In addition, in Fig.1 (a), it has shown with the dotted line about the structure inside the container 1A.
The accumulator 1 according to the first embodiment is realized by reducing the height and improving the liquid refrigerant.

[Description of configuration]
The accumulator 1 is connected to the suction side of the compressor, for example, and is used to store liquid refrigerant. The accumulator 1 includes a cylindrical container 1A, an inlet pipe 1B and an outlet pipe 1C connected to the container 1A, and a closing plate 1D provided in the container 1A.

(Container 1A)
The container 1A has a circular bottom portion 1A1 and an upper portion 1A2 and a lateral side surface portion 1A3 having a curved inner surface so that the refrigerant can be stored. The refrigerant is stored in the internal space formed by the bottom 1A1, the top 1A2, and the lateral side 1A3. An inlet pipe 1B is connected to the container 1A so that the refrigerant flows into the container 1A, and an outlet pipe 1C is connected so that the refrigerant stored in the container 1A flows out.
In the lateral side surface portion 1A3, it is preferable that the inner side surface of the lateral side surface portion 1A3 is curved so that the refrigerant flows along the inner side surface of the lateral side surface portion 1A3 and the refrigerant swirls in the container 1A. In this Embodiment 1, the case where it is cylindrical is shown as an example. Here, the bottom portion 1A1 and the upper portion 1A2 are described as an example of a flat plate shape, but are not limited thereto, and may be formed in a curved shape such as a spherical shape, for example. However, the shape may have a curved surface in part.

  An inlet pipe 1B and an outlet pipe 1C are connected to the lateral side surface portion 1A3 of the container 1A. More specifically, as shown in FIG. 1 (a), an outlet pipe 1C is connected to the lateral side surface portion 1A3 at a position shifted by 90 degrees with respect to a position where the inlet pipe 1B is connected. The angle formed between the connection position of the inlet pipe 1B and the connection position of the outlet pipe 1C is not limited to about 90 degrees. For example, the same angular position or an angular position shifted by 180 degrees may be used. There may be. Further, as shown in FIG. 1 (b), the lateral side surface portion 1A3 has an inlet so that the height position of the connection position of the inlet pipe 1B is higher than the height position of the connection position of the outlet pipe 1C. A pipe 1B and an outlet pipe 1C are connected. A closing plate 1D is provided in the container 1A. In the first embodiment, the accumulator 1 is shown as an example of a vertically placed tube, and the vertical width is larger than the horizontal width (diameter of the container 1A) of the dimensions of the container 1A. .

(Inlet piping 1B)
One end of the inlet pipe 1B is disposed in the container 1A, and the other end is connected to, for example, an evaporator (not shown) of the refrigeration cycle apparatus. That is, the inlet pipe 1B is connected through the lateral side surface portion 1A3 of the container 1A, one end side is disposed in the container 1A, and the other end side is connected to an evaporator or the like outside the container 1A. One end side of the inlet pipe 1B is disposed above the position where the outlet pipe 1C is connected to the container 1A. If the one end side of the inlet pipe 1B is higher than the connection position of the outlet pipe 1C to the container 1A, the connection position of the inlet pipe 1B to the container 1A may be the same as or lower than the connection position of the outlet pipe 1C. In this case, a portion of the inlet pipe 1B in the container 1A may be bent so that one end side of the inlet pipe 1B is higher than the connection position of the outlet pipe 1C with respect to the container 1A.
For example, the entire inlet pipe 1B is disposed above the connection position between the outlet pipe 1C and the container 1A. The configuration of the inlet pipe 1B is not limited to this. About the outer side of the container 1A, the height positions of the inlet pipe 1B and the outlet pipe 1C may be the same, or the inlet pipe 1B may be lower than the outlet pipe 1C.

  The inlet pipe 1B is formed so that the refrigerant flows into the container 1A along the inner side surface of the lateral side surface portion 1A3. The inlet pipe 1B extends along the inner surface side of the lateral side surface portion 1A3 of the container 1A from the other end side to the straight line portion 1B1 formed so as to extend linearly to the connection position with the container 1A. And a bent portion 1B2 formed by bending.

  The straight portion 1B1 has one end connected to the bent portion 1B2 and the other end connected to an evaporator (not shown). The bent portion 1B2 has an opening formed at one end and is connected to the straight portion 1B1 at the other end. The bent portion 1B2 may be arranged so that the entire portion of the bent portion 1B2 in the container 1A is in contact with the inner side surface of the lateral side surface portion 1A3, as shown in FIG. S may be formed.

  The bent portion 1B2 is provided in contact with the inner side surface of the lateral side surface portion 1A3 at one end where the opening of the bent portion 1B2 is formed. Thereby, the refrigerant that has flowed out of the inlet pipe 1B into the container 1A flows along the inner surface of the container 1A, and a swirling flow of the refrigerant is formed in the container 1A. For this reason, the gas-liquid separation performance of the refrigerant in the accumulator 1 is more easily obtained. Here, the one end where the opening of the bent portion 1B2 is formed has been described as being in contact with the inner side surface of the lateral side surface portion 1A3, but it is not necessary to be completely in contact with each other, and is separated. Also good.

  In addition, the inlet pipe 1B has been described as an example having the bent portion 1B2, but is not limited thereto, and the whole may be linear. That is, when the container 1A is viewed in a horizontal cross section, the angle formed between the tangent line (tangent surface) of the inner side surface of the lateral side surface portion 1A3 at the position where one end side of the inlet pipe 1B is provided and the inlet pipe 1B is small. For example, the inlet pipe 1B may be linear. Even in such an aspect, the refrigerant that has flowed out of the inlet pipe 1B flows along the lateral side surface portion 1A3.

  The entire inlet pipe 1B is arranged below the closing plate 1D. That is, a bent portion 1B2 provided on one end side of the inlet pipe 1B is provided below the closing plate 1D. More specifically, as shown in FIG. 1 (a), a closing plate 1D is provided at a position opposed to the opening end of the bent portion 1B2 serving as the refrigerant outlet from the inlet pipe 1B into the container 1A in the vertical direction. Is provided. When the container 1A is viewed from the upper side, the bent portion 1B2 is provided so that one end side of the bent portion 1B2 formed with an opening is located outside the peripheral portion F of the opening 1D1 of the closing plate 1D. is there.

  In addition, although the case where the whole inlet piping 1B was arrange | positioned below the closing board 1D was demonstrated to the example, it is not limited to it. For example, a portion on one end side in the container 1A of the inlet pipe 1B only needs to be disposed below the closing plate 1D. Thus, a part of the inlet pipe 1B may be above the closing plate 1D.

(Outlet piping 1C)
One end side of the outlet pipe 1C is disposed on the upper part 1A2 side in the container 1A, and the other end side is connected to a suction side of a compressor (not shown) of the refrigeration cycle apparatus. That is, the outlet pipe 1C is connected through the lateral side surface portion 1A3 of the container 1A, one end side is disposed on the upper 1A2 side in the container 1A, and the other end side is connected to the suction side of the compressor outside the container 1A. ing. The outlet pipe 1C is arranged on the lower side of the inlet pipe 1B on one end side, but is arranged on the upper side of the inlet pipe 1B on the other end side. 1C of exit piping is the 1st piping part 1C1 formed so that it may extend in a straight line connected to 1 A3 side surface part of the container 1A, and the bending part 1C2 which is connected to the 1st piping part 1C1, and is formed by bending. The linear second piping portion 1C3 is connected to the bent portion 1C2 and is formed to extend upward from the connecting portion with the bent portion 1C2.

  The first piping portion 1C1 has one end connected to the suction side of the compressor of the refrigeration cycle apparatus and the other end connected to one end of the bent portion 1C2. The first piping portion 1C1 is formed with a pressure relief hole 1C4 that is used to relieve pressure from the container 1A side to the outlet piping 1C side. The pressure relief hole 1C4 is formed on the connection position side with the bent portion 1C2 in the first piping portion 1C1. In addition, the formation position of the pressure relief hole 1C4 is not limited thereto, and may be formed, for example, in a portion in the container 1A in the first piping portion 1C1.

  1st piping part 1C1 is provided in the height position corresponding to the liquid level L of the refrigerant | coolant stored by the container 1A. Here, the height position corresponding to the liquid level L is, for example, the same height position as the liquid level L. In addition, it is not necessarily required to be at the same height as the liquid level L, and may be a height position shifted from the liquid level L up and down. Thus, since the 1st piping part 1C1 is near the liquid level, the swirling flow of the refrigerant | coolant formed in the container 1A becomes difficult to be prevented by the 1st piping part 1C1, and the gas-liquid separation performance in the accumulator 1 is carried out. It is possible to suppress the decrease of The pressure relief hole 1C4 is provided so as to be above the liquid level L. Thereby, the pressure of the refrigerant can be released more reliably.

  The bent portion 1C2 has one end connected to the second piping portion 1C3 and the other end connected to the first piping portion 1C1. The bent portion 1C2 is formed by bending the other end side, which is a connection position with the first piping portion 1C1, to the lower side, and then bending and extending in a direction parallel to the bottom portion 1A1, and then extending upward. It is. The bent portion 1C2 is formed by bending at three locations: a connection position side with the first piping portion 1C1, a connection position side with the second piping portion 1C3, and between these connection positions. An oil return hole 1C5 used for returning the refrigeration oil to the compressor side is formed in a portion of the bent portion 1C2 parallel to the bottom 1A1. By forming the oil return hole 1C5, it is possible to prevent the refrigerating machine oil flowing out from the compressor from being returned to the compressor and the sliding member of the compressor from being worn out.

  The second piping portion 1C3 has an opening formed at one end and the other end connected to one end of the bent portion 1C2. The 2nd piping part 1C3 is formed so that it may extend up and down, as shown in FIG. Note that one end side of the outlet pipe 1C protrudes upward from an opening 1D1 of a closing plate 1D described later. That is, the second piping part 1C3 is provided such that one end side of the second piping part 1C3 is positioned above the closing plate 1D.

(Blocking plate 1D)
The closing plate 1D is provided in the container 1A. The closing plate 1D in the container 1A is disposed above the connection position of the inlet pipe 1B and the connection position of the outlet pipe 1C. As shown in FIG. 1B, the closing plate 1D has a height position of the closing plate 1D that is lower than the opening end on one end side of the second piping portion 1C3 of the outlet piping 1C. In the container 1A, it is disposed above the inlet pipe 1B. As described above, both the inlet pipe 1B and the outlet pipe 1C are not located above the closing plate 1D, but the inlet pipe 1B and the outlet piping 1C are arranged so as to be vertically divided with the closing plate 1D as a boundary. Accordingly, it is possible to prevent the refrigerant having a high flow rate flowing out from the inlet pipe 1B into the container 1A from directly flowing into the outlet pipe 1C.

  That is, the refrigerant that has flowed out of the inlet pipe 1B into the container 1A flows in a state where the gas phase and the liquid phase are mixed. The refrigerant in which the gas phase and the liquid phase are mixed flows along the inner side surface (wall surface) of the lateral side surface portion 1A3 of the container 1A, and forms a swirling flow mainly in the space below the closing plate 1D. As the refrigerant swirls in the container 1A, the liquid refrigerant is collected on the inner side surface of the lateral side surface portion 1A3 of the container 1A, and the gas refrigerant is collected on the center side of the container 1A. In this way, the refrigerant in which the gas phase and the liquid phase are mixed is separated into a liquid refrigerant and a gas refrigerant.

  The liquid refrigerant is stored in the bottom 1A1 of the container 1A, and the gas refrigerant separated from the liquid refrigerant moves to the space above the closing plate 1D through the opening 1D1 of the closing plate 1D and flows into the outlet pipe 1C. For this reason, it is possible to suppress the liquid refrigerant from flowing into the outlet pipe 1 </ b> C and to prevent the liquid refrigerant from returning to the compressor. Note that the position where the opening 1D1 of the closing plate 1D is formed may be the center side of the container 1A. Thereby, the swirl | vortex flow is formed and the gas refrigerant which gathered to the center side of the container 1A can be made to flow promptly into the exit piping 1C.

  The closing plate 1D has been described by taking a shape having one opening 1D1 as an example, but the configuration of the closing plate 1D is not limited to this. For example, a plurality of openings may be formed in the closing plate 1D, and one end of the second pipe 1C3 of the outlet pipe 1C may be provided in one of the openings. In this case, gas flows from the opening other than the opening provided with the second piping part 1C3 to the upper side of the closing plate 1D, and the refrigerant flows into one end side of the second piping part 1C3. become. In addition, the closing plate 1D has been described as an example in which the flat surface of the closing plate 1D is provided in parallel with the horizontal direction, but is not limited thereto. For example, in the closing plate 1D, the plane of the closing plate 1D may be inclined with respect to the horizontal direction.

[Modification 1]
FIG. 2 shows a modification (accumulator 11) of the accumulator 1 shown in FIG.
As shown in FIG. 2, the accumulator 11 which is a modification of the accumulator 1 is provided with the 1st connection member 50 which connects the inlet piping 1B and the outlet piping 1C. The first connection member 50 has one end connected to the outlet pipe 1C and the other end connected to the inlet pipe 1B. The connection between the first connecting member 50 and the outlet pipe 1C and the inlet pipe 1B may be realized by joining, for example, by welding. The first connecting member 50 is provided in the container 1A, and the rigidity of the inlet pipe 1B and the outlet pipe 1C is increased by fixing the inlet pipe 1B and the outlet pipe 1C, for example, vibration from the outside of the accumulator 11. Even if an impact or the like is input to the accumulator 11, the inlet pipe 1B and the outlet pipe 1C are prevented from being damaged. The first connecting member 50 may be formed of a metal fitting having a preset plate thickness so as to ensure rigidity and strength, for example.

[Effects of the accumulator 1 according to the first embodiment]
In the accumulator 1 according to the first embodiment, the inlet pipe 1B and the outlet pipe 1C are connected to the lateral side surface portion 1A3 of the container 1A. Thus, since the inlet pipe 1B and the outlet pipe 1C enter and exit from the side of the container 1A, compared with the case where at least one of the inlet pipe 1B and the outlet pipe 1C is connected to the upper part of the accumulator 1, The height structure of the accumulator 1 can be suppressed. That is, the accumulator 1 according to Embodiment 1 can cope with a reduction in the height of the air conditioner by appropriately setting the diameter of the container 1A.

  The accumulator 1 according to the first embodiment is provided such that one end of the bent portion 1B2 where the opening is formed is in contact with the inner side surface of the lateral side surface portion 1A3. Thereby, the refrigerant that has flowed out of the inlet pipe 1B into the container 1A flows along the inner surface of the container 1A, and a swirling flow of the refrigerant is formed in the container 1A. That is, the accumulator 1 according to the first embodiment is easier to obtain the gas-liquid separation performance of the refrigerant.

  In the technique described in Patent Document 1, a closing plate that suppresses the liquid refrigerant from flowing into the outlet pipe is disposed below both the inlet pipe and the outlet pipe. That is, a closing plate is not provided between the inlet pipe and the outlet pipe. For this reason, the fast-flowing refrigerant that has flowed out of the inlet pipe tends to flow into the outlet pipe. However, in the closing plate 1D of the accumulator 1 according to the first embodiment, the height position of the closing plate 1D is lower than the opening end portion on the one end side of the second piping portion 1C3 of the outlet piping 1C. In the container 1A, it is disposed above the inlet pipe 1B. Thus, by arranging the closing plate 1D, it is possible to suppress the refrigerant that has flowed into the container 1A from the inlet pipe 1B from flowing directly into the outlet pipe 1C, and the liquid refrigerant can be discharged from the outlet pipe 1C. Inflow into the pipe 1 </ b> C is suppressed, and liquid back into the compressor can be suppressed.

  The 1st piping part 1C1 of the accumulator 1 which concerns on this Embodiment 1 is provided in the height position near with respect to the liquid level L of the refrigerant | coolant stored by the container 1A. Thus, since the 1st piping part 1C1 is near the liquid level L, the swirling flow of the refrigerant | coolant formed in the container 1A becomes difficult to be prevented by the 1st piping part 1C1, and the gas-liquid separation in the accumulator 1 is carried out. It is possible to suppress a decrease in performance.

  In the first embodiment, the case where the lateral side surface portion 1A3 of the container 1A is cylindrical has been described as an example, but is not limited thereto. For example, the lateral side surface portion 1A3 of the container 1A may have a polygonal shape such as a rectangular shape. In the case of a polygonal shape such as a rectangular shape, if the portions corresponding to the four vertices of the rectangle are formed in a curved shape, the refrigerant can flow smoothly along the inner side surface of the lateral side surface portion 1A3. It can suppress that a liquid-separation effect reduces.

Embodiment 2. FIG.
FIG. 3 is a schematic configuration example diagram of the accumulator 21 according to the second embodiment. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and differences from the first embodiment will be mainly described. 3A is a view of the accumulator 21 as viewed from above, FIG. 3B is a longitudinal sectional view of the accumulator 21, and FIG. 3C is a view of the accumulator 21 shown in FIG. It is the figure seen from the arrow A side shown to).

  In the first embodiment, the accumulator is a vertically arranged accumulator. That is, in the accumulator 1 according to Embodiment 1, the longitudinal width of the container 1A is larger than the lateral width of the lateral side surface portion 1A3 (diameter of the lateral side surface portion 1A3). On the other hand, the accumulator 21 according to the second embodiment is an accumulator in a horizontal tube shape. That is, the lateral width of the lateral side surface portion of the container 21A of the accumulator 21 is larger than the longitudinal width of the container 21A.

(Container 21A)
The container 21A has a rectangular bottom portion 21A1 and an upper portion 21A2. Further, the container 21A has a first curved surface portion 21A31 and a second curved surface portion 21A32 formed in a hemispherical shape, and a first flat surface portion 21A33 and a second flat surface portion 21A34 as the lateral side surface portion of the container 21A. . The first curved surface portion 21A31 and the second curved surface portion 21A32 are provided to face each other, and the first flat surface portion 21A33 and the second flat surface portion 21A34 are provided to face each other.
As described above, the lateral side surface portion of the container 21A includes the first curved surface portion 21A31, the second curved surface portion 21A32, the first flat surface portion 21A33, and the second flat surface portion 21A34. The first flat surface portion 21A33 and the second flat surface portion 21A34 are provided so as to stand up with respect to the bottom portion 21A1, and have a shape in which the horizontal width is larger than the vertical width. In addition, the first curved surface portion 21A31 and the second curved surface portion 21A32 are described as an example of a hemispherical shape, but are not limited to a hemispherical shape, and may be a semielliptical shape, for example. In addition, the bottom 21A1, the top 21A2, the first plane 21A33, and the second plane 21A34 are described as being planar, but are not limited thereto, and are curved surfaces such as a spherical shape, for example. It may be formed in a shape, or a shape having a curved surface in part.

An inlet pipe 21B is connected to the first curved surface portion 21A31 of the lateral side surface portion of the container 21A so that the refrigerant flows into the container 21A, and the refrigerant stored in the container 21A flows out. An outlet pipe 21C is connected. In addition, the inlet pipe 21B and the outlet pipe 21C are connected to the first curved surface portion 21A31 so that the height position of the connection position of the inlet pipe 21B is higher than the height position of the connection position of the outlet pipe 21C. ing. If the one end side of the inlet pipe 21B is higher than the connection position of the outlet pipe 21C to the container 1A, the connection position of the inlet pipe 21B to the container 21A may be the same as or lower than the connection position of the outlet pipe 21C. In this case, a part of the inlet pipe 21B in the container 21A may be bent so that one end side of the inlet pipe 21B is higher than the connection position of the outlet pipe 21C with respect to the container 21A.
In the second embodiment, the case where the inlet pipe 21B and the outlet pipe 21C are connected to the first curved surface portion 21A31 has been described as an example. However, the present invention is not limited to this, and the inlet pipe 21B and the outlet pipe 21C. One of them may be connected to any one of the second curved surface portion 21A32, the first flat surface portion 21A33, and the second flat surface portion 21A34. Further, both the inlet pipe 21B and the outlet pipe 21C may be connected to any one of the second curved surface portion 21A32, the first flat surface portion 21A33, and the second flat surface portion 21A34.

(Inlet piping 21B)
The inlet pipe 21B has a straight portion 21B1 formed so as to extend linearly from the other end side to the connection position with the container 21A, and the inner surface side of the first flat portion 21A33 of the container 21A from the connection position to one end side. And a bent portion 21B2 formed so as to be bent. The bent portion 21B2 is formed so that the entire portion of the bent portion 21B2 in the container 21A is formed along the inner side surface of the container 21A and does not need to be in contact with the inner side surface of the container 21A. As shown in FIG. 3A, a gap S1 may be formed between the inner surface of the first curved surface portion 21A31 and the inner surface of the first flat surface portion 21A33 of the container 21A.

The bent portion 21B2 is provided in contact with the inner surface of the first flat surface portion 33 at one end where the opening of the bent portion 21B2 is formed. Thereby, the refrigerant that has flowed out of the inlet pipe 21B into the container 21A flows along the inner surface of the container 21A, and a swirling flow of the refrigerant is formed in the container 21A. Here, one end where the opening of the bent portion 21B2 is formed is described as being in contact with the inner side surface of the first flat surface portion 21A33, but is not in contact, but is in complete contact. It is not necessary and may be separated.
Further, as shown in FIG. 3A, when the container 21A is viewed from the upper side, one end side where the bent portion 21B2 is formed is located outside the peripheral portion F1 of the opening portion 21D1 of the closing plate 21D. The bent portion 21B2 is provided.

(Outlet piping 21C)
The outlet pipe 21C has a first pipe part 21C1 formed to extend linearly connected to the first curved surface part 21A31 of the container 21A, and a bent part 21C2 connected to the first pipe part 21C1 and bent. And a second piping portion 21C3 connected to the bent portion 21C2 and formed to extend upward from the connecting portion with the bent portion 21C2.

  The first piping portion 21C1 has one end connected to the suction side of the compressor of the refrigeration cycle apparatus and the other end connected to one end of the bent portion 21C2. The first piping portion 21C1 has a pressure relief hole 21C4 that is used to relieve pressure from the container 21A side to the outlet piping 21C side.

  The first piping part 21C1 is provided at a height position close to the liquid level L of the refrigerant stored in the container 21A. Here, the height position may be a height position equivalent to the liquid level. As described above, since the first piping portion 21C1 is near the liquid level L, the swirling flow of the refrigerant formed in the container 21A is not easily obstructed by the first piping portion 21C1, and the gas-liquid separation in the accumulator 21 is performed. It is possible to suppress a decrease in performance. The pressure relief hole 21C4 is provided to be above the liquid level. Thereby, the pressure of the refrigerant can be released more reliably. The bent portion 21C2 has an oil return hole 21C5 that is used to return the refrigeration oil to the compressor side.

  Unlike the second piping part 21C3 described in the first embodiment, the second piping part 21C3 is connected to a hole formed in the closing plate 21D. Note that a gap is not provided between the hole portion of the closing plate 21D and the second piping portion 21C3, and the hole may be securely fixed, or the diameter of the hole portion of the closing plate 21D is the first. It may be larger than the outer diameter of the two piping parts 21C3. The second piping part 21C3 is provided such that one end side of the second piping part 21C3 is located above the closing plate 21D. That is, the opening end portion of the second piping portion 21C3 is disposed above the closing plate 21D.

(Blocking plate 21D)
The closing plate 21D is formed with an opening 21D1 through which the gas refrigerant on the bottom 21A1 side flows to the upper 21A2 side and a hole into which the outlet pipe 21C is inserted. Note that the configuration of the opening 21D1 is not limited to that shown in FIG. 3, and may be, for example, a circle or a plurality of openings 21D1. In addition, as shown in FIG.3 (b), as for the closing board 21D, the height position of the closing board 21D is below the opening edge part of the one end side of the 2nd piping part 21C3 of the exit piping 21C. In the container 21A, it is disposed above the inlet pipe 21B. In this way, by arranging the closing plate 21D, it is possible to prevent the refrigerant that has flowed into the container 21A from the inlet pipe 21B from flowing directly into the outlet pipe 21C. .

[Modification 2]
FIG. 4 shows a modification (accumulator 31) of the accumulator 21 shown in FIG.
As shown in FIG. 4, an accumulator 31 that is a modification of the accumulator 21 includes a second connection member 50B that connects the inlet pipe 21B and the closing plate 21D. The second connecting member 50B has one end connected to the inlet pipe 21B and the other end connected to the closing plate 21D. The connection between the second connecting member 50B, the inlet pipe 21B, and the closing plate 21D may be realized by joining, for example, by welding. The second connecting member 50B is provided in the container 21A, and the rigidity of the inlet pipe 21B is increased by fixing the inlet pipe 21B and the closing plate 21D. For example, vibration and impact from the outside of the accumulator 11 are generated. Even if input to the accumulator 11, the inlet pipe 21B is prevented from being damaged. In addition, this 2nd connection member 50B is good to comprise with the metal metal fitting etc. which have preset plate | board thickness so that rigidity and intensity | strength can be ensured, for example.

  In addition, although Embodiment 1 demonstrated as an example what connected the inlet piping 1B and the outlet piping 1C with the 1st connection member 50, the 2nd connection member 50B demonstrated in Embodiment 2 is used as the 1st connection member. It may be attached instead of 50, or both may be attached. In the second embodiment, the inlet pipe 21B and the closing plate 21D are connected by the second connection member 50B as an example. However, the first connection member 50 described in the first embodiment is connected to the second connection member 50B as a second connection. You may attach instead of the member 50B, and you may attach both.

[Effects of the accumulator 21 according to the second embodiment]
The accumulator 21 according to the second embodiment can obtain the following effects in addition to the same effects as the accumulator 1 according to the first embodiment.

  The accumulator 21 according to the second embodiment can connect the inlet pipe 21B and the outlet pipe 21C to one side surface portion. That is, the connection positions of the inlet pipe 21B and the outlet pipe 21C can be collected on the first curved surface portion 21A31.

  If the lateral width (width in the direction parallel to the horizontal direction) of the inlet pipe 21B and the outlet pipe 21C is long, the inlet pipe 21B and the outlet pipe 21C may not be accommodated in the container 21A of the accumulator 21. However, the container 21A of the accumulator 21 according to the second embodiment has a configuration in which the first flat surface portion 21A33 and the second flat surface portion 21A34 are provided as lateral side surfaces so that the lateral width of the container 21A is increased. The width is large. Thereby, even if the lateral width of the inlet pipe 21B and the outlet pipe 21C is large, the inlet pipe 21B and the outlet pipe 21C can be attached to the container 21A. As described above, the accumulator 21 according to the second embodiment can suppress a reduction in assembling ability even if the lateral width of the inlet pipe 21B and the outlet pipe 21C is large.

Embodiment 3 FIG.
FIG. 5 is a schematic diagram of the railway vehicle 500 and the air conditioner 300 mounted on the railway vehicle 500. FIG. 6 is an example of a refrigerant circuit configuration of the air conditioner 300. With reference to FIG.5 and FIG.6, the aspect at the time of the air conditioning apparatus 300 being mounted in the rail vehicle 500 is demonstrated. 6 shows an example in which the air conditioner 300 includes the accumulator 1 according to the first embodiment. However, any one of the accumulator 11, the accumulator 21, and the accumulator 31 is included. Also good.

  The air conditioner 300 is mounted on, for example, the upper part of the railway vehicle 500. A casing 501 that is used to install the air conditioner 300 is provided on the upper part of the railway vehicle 500. The air conditioner 300 is installed in the housing 501. The installation position of the air conditioner 300 is not limited to the upper part of the railway vehicle 500. For example, you may install the air conditioning apparatus 300 under the floor of a vehicle like the case where the railway vehicle 500 is a Shinkansen, a limited express train, etc.

  The air conditioner 300 includes a compressor 301 that compresses a refrigerant, a four-way valve 302 that switches a refrigerant flow path, a first heat exchanger 303 that functions as a condenser (heat radiator) or an evaporator, an evaporator or a condenser. The second heat exchanger 304 that functions as the above, the expansion device 305 that depressurizes the refrigerant, and the accumulator 1, accumulator 11, accumulator 21, and accumulator 31 described in the first and second embodiments. The air conditioner 300 includes a refrigerant circuit configured by connecting these compressors 301 and the like through refrigerant piping. The air conditioner 300 is provided with a blower (not shown) that supplies air to the first heat exchanger 303 and the second heat exchanger 304.

[Effects of the air-conditioning apparatus 300 according to Embodiment 3]
The air conditioner 300 according to the third embodiment includes the accumulators 1 and 11 according to the first embodiment and the accumulators 21 and 31 according to the second embodiment, and the first and second embodiments. In addition to the same effects as described in the above, the following effects are achieved.
That is, since the inlet pipe 1B and the outlet pipe 1C are connected to the lateral side surface of the container 1A and the accumulator 1 can be reduced in height, the air conditioner 300 itself can also be reduced in height. Thereby, even if it is a case where it is difficult to secure a space where the air conditioner 300 can be installed like the railway vehicle 500, the air conditioner 300 can be installed more reliably.

  The air conditioner 300 according to the third embodiment has been described as an example mounted on a railway vehicle, but is not limited thereto, and may be installed in a house, building, warehouse, or the like. Good. Even in these cases, the same effect as the air conditioner 300 can be obtained. For example, even if it is difficult to secure a space where the air conditioning apparatus 300 can be installed, the air conditioning apparatus 300 can be installed more reliably.

  1 accumulator, 1A container, 1A1 bottom, 1A2 top, 1A3 lateral side surface, 1B inlet piping, 1B1 straight section, 1B2 bent section, 1C outlet piping, 1C1 first piping section, 1C2 bent section, 1C3 second piping section, 1C4 Pressure relief hole, 1C5 oil return hole, 1D closing plate, 1D1 opening, 11 accumulator, 21 accumulator, 21A container, 21A1 bottom, 21A2 top, 21A31 first curved surface, 21A32 second curved surface, 21A33 first flat surface, 21A34 2nd plane part, 21B inlet pipe, 21B1 straight part, 21B2 bent part, 21C outlet pipe, 21C1 first pipe part, 21C2 bent part, 21C3 second pipe part, 21C4 pressure relief hole, 21C5 oil return hole, 21D Plate, 21D1 opening, 31 accumulator, 3 1st plane part, 50 1st connection member, 50B 2nd connection member, 300 Air conditioner, 301 Compressor, 302 Four-way valve, 303 1st heat exchanger, 304 2nd heat exchanger, 305 Expansion device, 500 Railway Vehicle, 501 housing, A arrow, F peripheral portion, F1 peripheral portion, L liquid surface, S clearance, S1 clearance.

Claims (12)

A container for storing refrigerant;
One end side is provided in the container, and the other end side is connected to the lateral side surface of the container, and an inlet pipe,
One end side is provided above one end side of the inlet pipe in the container, and the other end side is connected to the lateral side surface portion of the container, and an outlet pipe.
A closing plate provided in a height position between one end side of the inlet pipe and one end side of the outlet pipe;
An accumulator characterized by comprising: The container is
The inner side surface of the lateral side surface portion is curved so that the refrigerant flows along the inner side surface of the lateral side surface portion and the refrigerant swirls in the container,
The inlet pipe is
The accumulator according to claim 1, wherein the refrigerant is formed so as to flow into the container along an inner surface of the lateral side surface portion. In the closing plate,
An opening is formed in the center of the container;
The inlet pipe is
One end side is provided below the closing plate,
The outlet pipe is
The accumulator according to claim 1, wherein one end side protrudes upward from the opening of the closing plate. The outlet pipe is
A first piping part extending from the lateral side part into the container;
A bent portion that is connected to the first piping portion and extends downward from a connection position with the first piping portion;
2. A second pipe portion connected to the bent portion and provided so that an opening end portion which is not connected to the bent portion is positioned above the closing plate. The accumulator as described in any one of -3. The first piping part is
The accumulator according to claim 4, wherein the accumulator is connected to a height position corresponding to a liquid level of the liquid refrigerant stored in the container in the lateral side surface portion. The accumulator according to claim 4 or 5, wherein an oil return hole is formed in the bent portion. The accumulator according to any one of claims 4 to 6, wherein a pressure relief hole is formed in the first piping part above the liquid level of the liquid refrigerant stored in the container. . The container is
The lateral side portion is formed in a cylindrical shape,
The accumulator according to any one of claims 1 to 7, wherein a vertical width of the container is configured to be larger than a diameter of the lateral side surface portion. The container is
The accumulator according to any one of claims 1 to 7, wherein the lateral width of the lateral side surface portion is configured to be larger than the longitudinal width of the container. The accumulator according to any one of claims 1 to 9, further comprising a first connection member that connects the inlet pipe and the outlet pipe. The accumulator according to any one of claims 1 to 10, further comprising a second connecting member that connects the inlet pipe and the closing plate. An air conditioner comprising the accumulator according to claim 1.

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