JP2005241068A - Accumulator, and refrigerating device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact accumulator capable of controlling rate of quantity of a gas refrigerant and a liquid refrigerant to be returned to a compressor, and to provide a refrigerating device using the same. <P>SOLUTION: The accumulator 1 has a container main body 2 for storing the liquid refrigerant, a flow-in pipe 3 for leading the refrigerant from an evaporator into the container main body 2, and a flow-out pipe 4 for supplying the gas refrigerant separated into gas and liquid inside the container main body 2 to the compressor. The flow-out pipe 4 is formed into a U-shape formed of a front flow part 5 communicating with inside of the container main body 2 in a lower part of the container main body 2 and a rear flow part 6 extended upward outside the container main body 2, and an oil return pipe 14 is provided to communicate a lower part of the container main body 2 with a lower part of the rear flow part 6 of the flow-out pipe 4, and a balance pipe 9 is provided to communicate an upper part of the container main body 2 with an upper part of the rear flow part 6 of the flow-out pipe 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an accumulator and a refrigeration apparatus used for air conditioning operation, hot water supply / freezing, and the like.

  FIG. 4 is a schematic configuration diagram of a refrigerant circuit of a conventional vapor compression refrigeration apparatus used for indoor air conditioning. Below, the refrigerating cycle of this refrigerant circuit is demonstrated.

  The refrigerant circuit includes a four-way valve 21 that controls the refrigerant flow in the refrigerant circuit during cooling and heating, a compressor 22, and an indoor heat exchanger 23 that functions as an evaporator during cooling and as a condenser during heating. The indoor fan 24 for sending wind to the indoor heat exchanger 23, the outdoor heat exchanger 25 acting as a condenser during cooling and as an evaporator during heating, and sending the wind into the outdoor heat exchanger 25 The outdoor fan 26, an expansion valve 27a that acts as an expansion valve during cooling and is fully opened during heating and becomes part of the piping, and an expansion valve that is fully opened during cooling and becomes part of the piping and acts as an expansion valve during heating. 27b, an accumulator 28, and piping connecting them.

  During cooling, the refrigerant discharged from the compressor 22 flows as indicated by the solid line arrow by setting the four-way valve 21 to the solid line state. On the other hand, at the time of heating, the refrigerant discharged from the compressor 22 flows as indicated by broken line arrows by setting the four-way valve 21 to the broken line state.

  Next, the state change of the refrigerant in the refrigeration cycle will be described with reference to the Mollier diagram shown in FIG. In FIG. 5, the vertical axis represents pressure and the horizontal axis represents enthalpy. In the figure, x is a curve indicating the boundary between the gas phase state, liquid phase state and gas-liquid two-phase state of the refrigerant, the curve portion on the right side from the critical point y indicates the saturated vapor line, and the left curve portion Indicates a saturated liquid line.

  In the right region of the saturated vapor line, the refrigerant is superheated steam, and in the left region of the saturated vapor line, the refrigerant is wet steam. The refrigerant is in a liquid state in the left region of the saturated liquid line, and the refrigerant is wet steam in the right region of the saturated liquid line.

  Therefore, between a and b in the figure, the refrigerant is compressed by the compressor 22 to become high-temperature and high-pressure superheated steam. Moreover, between bc in a figure, a refrigerant | coolant changes from a superheated steam state to a liquid state by condensing in the condenser 23 (at the time of heating) or 25 (at the time of cooling). And between cd in a figure, a refrigerant | coolant becomes a two-phase refrigerant | coolant which the liquid refrigerant and the gas refrigerant mixed by depressurizing with the expansion valve 27a (at the time of cooling) or 27b (at the time of heating). Between da in the figure, the two-phase refrigerant evaporates by taking heat from the surroundings in the evaporator 25 (during heating) or 23 (during cooling), and becomes superheated steam. Then, the refrigerant that has become superheated steam is sent again into the compressor 22 via the accumulator 28.

  However, depending on the operation state, the refrigerant returned from the evaporator 25 (during heating) or 23 (during cooling) may not be all superheated vapor as described above, and there may be partially liquid refrigerant. is there. Therefore, in order to prevent the liquid refrigerant from returning to the compressor 22 and damaging the compressor 22, the gas refrigerant is separated by the accumulator 28 and only the gas refrigerant is supplied to the compressor 22.

  FIG. 6 is an internal perspective schematic structural diagram of an example of a conventional accumulator (see Patent Document 1 below). As shown in the figure, the accumulator 28 includes a container 29 that forms the outer appearance of the main body, and an inflow pipe 30 and a U-shaped outflow pipe 31 that are provided so as to communicate with the inside of the container 29. The inflow pipe 30 is a pipe through which the discharge return refrigerant from the evaporator 25 (during heating) or 23 (during cooling) flows into the container 29. The outflow pipe 31 is a pipe that returns the gas refrigerant to the compressor 22, and has a U-shaped body in the container 29.

  The outflow pipe 31 is divided into a front flow portion 32 on the upstream side of the gas refrigerant flow with respect to the U-shaped curved portion and a wake portion 33 on the downstream side with respect to the U-shaped curved portion. The end portion of the front flow portion 32 is a suction port 34 for sucking in the gas refrigerant. Further, an oil return hole 35 is provided in the U-shaped curved portion of the outflow pipe 31, and a balance hole 36 is provided in the vicinity of the wake portion 33 above the container.

  The tip of the inflow pipe 30 in the container 29 is arranged so that the refrigerant returned from the evaporator 25 (during heating) or 23 (during cooling) flowing into the container 29 does not enter the suction port 34 directly. It is bent to the inner periphery of the container 29 so as not to disturb the liquid level of the liquid refrigerant 38 accumulated in the container 29 described later.

  The return refrigerant discharged from the inflow pipe 30 may be in a mixed state of a gas refrigerant and a liquid refrigerant. In this case, the liquid refrigerant 38 in the lower part of the container 29 and the gas refrigerant 37 in the upper part of the container 29 in the container 29. Gas-liquid separation. Since the suction port 34 is designed to be higher than the liquid level of the liquid refrigerant 38, the gas refrigerant 37 is returned from the suction port 34 to the compressor 22 through the outflow pipe 33.

  As a capacity (the maximum amount of the liquid refrigerant 38) that the accumulator 28 can separate into gas and liquid, it is generally safe to set about 75% of the refrigerant charge amount in the refrigerant circuit. It is adjusted by the height of the suction port 34 from the bottom.

  In the refrigerant circuit, a part of the lubricating oil such as the lubricating oil reservoir in the compressor 22 and the lubricating oil reservoir in the oil separator flows out and circulates together with the refrigerant. It tends to stay in the container 29 in a dissolved state. Therefore, if this situation progresses, the compressor 22 and the like may run out of lubricating oil. Therefore, a small amount of liquid refrigerant 38 containing lubricating oil is gradually returned to the compressor 22 and the like from the oil return hole 35 using the flow of the gas refrigerant in the outflow pipe 31.

  Further, since the oil return hole 35 is present in the liquid refrigerant 38, the liquid refrigerant 38 accumulates in the outflow pipe 31 to the same height as the liquid surface of the liquid refrigerant 38 when the refrigeration apparatus is stopped. The liquid refrigerant accumulated in the outflow pipe 31 may flow into the compressor 22 at the same time as the refrigeration apparatus is started. The balance hole 36 is a hole for eliminating this possibility, and when the refrigeration apparatus is started, the gas refrigerant 37 is sucked from the balance hole 36 to suppress the flow of the liquid refrigerant accumulated in the outflow pipe 31.

JP 07-159003 A Japanese Patent Laid-Open No. 11-281207

  As described above, in the conventional accumulator 28, since the outflow pipe 31 is U-shaped in the container 29, it is necessary to set the container diameter to a predetermined size, and the accumulator is reduced in size, particularly the scale of the container diameter. It was a restriction in going down.

  The ratio of the amount of the gas refrigerant 37 returning from the suction port 34 or the balance hole 36 to the compressor 22 and the amount of the liquid refrigerant 38 containing lubricating oil returning from the oil return hole 35 to the compressor 22 is the ratio of the compressor 22. Although it fluctuates depending on the operating state of the refrigeration apparatus including the rotation speed, it is desirable that this ratio can be controlled from the viewpoint of compressor protection and the like.

  On the other hand, the oil return hole 35 and the balance hole 36 are simply holes provided in the outflow pipe 31, and therefore the hole diameter and the like cannot be adjusted during the operation of the refrigeration apparatus, and the control of the ratio is difficult. is there. Further, since the oil return hole 35 and the balance hole 36 are in the container 29, it is difficult to make a structure in which the diameter of the oil return hole 35 and the balance hole 36 can be adjusted. It becomes necessary to link with the outside, resulting in a complicated structure.

  There is also an accumulator as described in Patent Document 2 described above, and by deforming the U-shaped outflow pipe, only the so-called front flow portion of the outflow pipe is communicated with the inside of the container to reduce the diameter of the container. Although there is an example, in this example, since a portion that functions as a so-called balance hole cannot be provided, the compressor cannot be sufficiently protected, and it is difficult to adjust the diameter of the oil return hole and the like. Therefore, the oil return amount cannot be adjusted.

  The present invention has been made in view of the above circumstances, and provides a downsized accumulator and a refrigeration apparatus using the accumulator that can control the ratio of the amount of gas refrigerant and the amount of liquid refrigerant returned to the compressor. With the goal.

An accumulator according to the present invention that solves the above problems is as follows.
In an accumulator having a container main body for storing a liquid refrigerant, an inflow pipe for introducing refrigerant from an evaporator into the container main body, and an outflow pipe for supplying gas refrigerant separated in the container main body to a compressor ,
The outflow pipe is a U-shaped accumulator comprising a front flow portion communicating with the inside of the container main body at a lower portion of the container main body and a rear flow portion extending upward at the outside of the container main body. It is.
The “lower part of the container body” refers to the bottom part of the container body, the lower side wall part of the container body, and the like.

In addition, other accumulators according to the present invention are:
In the above accumulator,
The accumulator is characterized in that an oil return hole is provided below the inside of the container main body in the upstream portion of the outflow pipe.

In addition, other accumulators according to the present invention are:
In the above accumulator,
The accumulator is characterized in that a first pipe that communicates the lower part of the container main body and the lower part of the downstream part of the outflow pipe is provided.
The first pipe has the same function as a so-called oil return hole.

In addition, other accumulators according to the present invention are:
In the above accumulator,
The accumulator is characterized in that a second pipe that communicates the upper side in the container main body and the upper side in the wake part of the outflow pipe is provided.
The second pipe has the same function as a so-called balance hole, and “upward in the container body” means a space other than the space below the container in which the liquid refrigerant is stored in the container body, that is, the gas refrigerant in the container body. It is a space where there exists.

In addition, other accumulators according to the present invention are:
In the above accumulator,
The accumulator is characterized in that the first or second pipe is any one of a pipe, a capillary tube, and a pipe with an opening degree adjusting valve.

The refrigeration apparatus according to the present invention for solving the above problems is as follows.
In a refrigeration apparatus in which a compressor, a condenser, an expansion valve, an evaporator, and an accumulator are sequentially connected by a refrigerant flow path.
The accumulator is a refrigeration apparatus that is the accumulator described above.

According to the accumulator according to the present invention,
In an accumulator having a container main body for storing liquid refrigerant, an inflow pipe for introducing refrigerant from an evaporator into the container main body, and an outflow pipe for supplying gas refrigerant separated in the container main body to a compressor ,
Since the outflow pipe has a U-shape consisting of a front flow part communicating with the inside of the container main body at the lower part of the container main body and a rear flow part extending upwards outside the container main body,
The container can be made smaller than the conventional accumulator, and in particular, the container diameter can be scaled down. Moreover, since it can be set as the container shape which considered the pressure | voltage resistant structure, the thickness of a container can be made thin.

Further, according to another accumulator according to the present invention,
In the above accumulator,
Since an oil return hole is provided below the inside of the container body in the upstream portion of the outflow pipe,
In addition to the above effects, a small amount of liquid refrigerant containing lubricating oil can be gradually returned to the compressor or the like from the oil return hole, thereby eliminating the possibility that the compressor or the like will become insufficient in lubricating oil.

Further, according to another accumulator according to the present invention,
In the above accumulator,
Since the 1st piping which connects the downward direction in the said container main body and the downward direction in the backflow part of the said outflow pipe is provided (the member which has a function of an oil return hole was able to be installed in the exterior of a container) ,
In addition to the above effects, the amount of liquid refrigerant containing lubricating oil returning to the compressor can be controlled without a complicated structure.

Further, according to another accumulator according to the present invention,
In the above accumulator,
Since the second pipe that communicates the upper part in the container main body and the upper part in the wake part of the outflow pipe is provided (a member having a function of a balance hole could be installed outside the container),
In addition to the above effects, the amount of the gas refrigerant returning to the compressor can be controlled without using a complicated structure. Furthermore, when the first pipe is provided, the ratio of the amount of the gas refrigerant returning to the compressor and the amount of the liquid refrigerant returning to the compressor can be controlled without using a complicated structure.

Further, according to another accumulator according to the present invention,
In the above accumulator,
Since the first or second pipe is either a pipe, a capillary tube or a pipe with an opening adjustment valve,
In addition to the above effects, the ratio between the amount of gas refrigerant returning to the compressor and the amount of liquid refrigerant returning to the compressor can be controlled more accurately.

According to the refrigeration apparatus according to the present invention,
In a refrigeration apparatus in which a compressor, a condenser, an expansion valve, an evaporator, and an accumulator are sequentially connected by a refrigerant flow path.
Since the accumulator is the accumulator described above,
It can be set as a compact freezing apparatus. Further, the compressor and the like can be protected with a simple structure by controlling the ratio of the amount of gas refrigerant returning to the compressor and the amount of liquid refrigerant returning to the compressor.

<First Embodiment>
FIG. 1 is an internal perspective schematic structural diagram of the accumulator according to the first embodiment. As shown in FIG. 1, the accumulator 1 includes a container 2 that forms the exterior of the main body, and an inflow pipe 3 and a U-shaped outflow pipe 4 that are provided so as to communicate with the inside of the container 2. The inflow pipe 3 is a pipe through which the discharge return refrigerant from the evaporator flows into the container 2. The outflow pipe 4 is a pipe for returning the gas refrigerant to the compressor, and a part of the U-shaped body is accommodated in the container 2.

  The outflow pipe 4 is divided into a front flow portion 5 that is upstream of the gas refrigerant flow with respect to the U-shaped curved portion and a wake portion 6 that is downstream of the U-shaped curved portion. Only 5 is accommodated inside the container 2, and the wake portion 6 is configured to be outside the container 2.

  An end portion of the upstream portion 5 is a suction port 7 for sucking the gas refrigerant 10. An oil return hole 8 is provided in the vicinity of the lower portion in the container 2 in the upstream portion 5 of the outflow pipe 4. Further, by connecting the upper part of the rear flow part 6 and the upper part of the container 2 by the balance pipe 9, the space in the container 2 where the gas refrigerant 10 exists and the upper part of the rear flow part 6 of the outflow pipe 4 are connected. ing.

  The front end portion of the inflow pipe 3 in the container 2 is a liquid refrigerant that collects in the container 2 to be described later so that the discharge return refrigerant from the evaporator flowing into the container 2 does not directly enter the suction port 7. 11 is bent to the inner periphery of the container 2 so as not to disturb the liquid level.

  The return refrigerant discharged from the inflow pipe 3 may be mixed with the gas refrigerant and the liquid refrigerant. In this case, the liquid refrigerant 11 at the lower part of the container 2 and the gas refrigerant 10 at the upper part of the container 2 in the container 2. Gas-liquid separation. Since the suction port 7 is designed to be higher than the liquid level of the liquid refrigerant 11, the gas refrigerant 10 is returned from the suction port 7 to the compressor via the outflow pipe 4.

  As a capacity (the maximum amount of the liquid refrigerant 11) in which the accumulator 1 can be separated into gas and liquid, it is generally safe to set it to about 75% of the refrigerant charge amount in the refrigerant circuit. It is adjusted by the height of the suction port 7 from the bottom.

  In the present embodiment, since the rear flow part 6 of the U-shaped outflow pipe 4 is configured to be outside the container 2, the diameter of the container 2 is such that the front flow part 5 of the outflow pipe 4 can be accommodated. do it. Therefore, the container can be made smaller than the conventional accumulator, in particular, the container diameter can be scaled down. Moreover, since it can be set as the container shape which considered the pressure | voltage resistant structure, the thickness of a container can be made thin. In order to maintain and secure the above-described gas-liquid separation capacity, the height of the container 2 and the height of the suction port 7 from the bottom of the container 2 are adjusted by the scale-down of the container diameter. .

  The balance pipe 9 functions as a conventional balance hole. That is, by sucking the gas refrigerant 10 through the balance pipe 9 when the refrigeration apparatus is started, the liquid refrigerant 11 accumulated in the outflow pipe 4 when the refrigeration apparatus is stopped is prevented from flowing into the compressor at the same time as the refrigeration apparatus is started. .

  FIG. 2A is an enlarged view of the balance pipe 9 that communicates the portion A in FIG. FIG. 2B shows an embodiment in which a capillary tube 12 communicates instead of the balance pipe 9. By applying a capillary tube instead of the balance pipe, the diameter of the capillary can be adjusted, and the amount of the gas refrigerant 10 flowing into the outflow pipe 4 via the capillary tube 12 can be adjusted. This is because the capillary tube can be used to adjust the differential pressure necessary to adjust the pulsation of the gas pressure in the accumulator 1 and the amount of liquid return through the oil return hole 8 with easy resistance adjustment. .

  FIG. 2 (c) shows an embodiment in which communication is made with a pipe 13 with an opening adjustment valve instead of the balance pipe 9. By applying a pipe with an opening adjustment valve instead of the balance pipe, the opening degree of the valve is adjusted by manual or automatic control so that the gas refrigerant 10 flows through the pipe 13 with the opening adjustment valve. The amount flowing into the can be adjusted.

  By using the communication means shown in FIGS. 2B and 2C, regardless of the operating state of the refrigeration apparatus, the gas refrigerant 10 can be supplied from the suction port 7, the capillary tube 12 or the pipe 13 with an opening adjustment valve to the compressor. It is possible to control the ratio of the amount returned to the amount and the amount of the liquid refrigerant 11 containing the lubricating oil returning from the oil return hole 8 to the compressor. For example, when the refrigeration apparatus is started, the opening of the opening adjustment valve is increased so that the liquid refrigerant 11 in the outflow pipe 4 does not flow into the compressor but the gas refrigerant 10 flows in. Moreover, since these communicating means are outside the container 2, the above-described control can be performed without using a complicated structure.

<Second Embodiment>
FIG. 3 is an internal perspective schematic structural diagram of the accumulator according to the second embodiment. As shown in the figure, the accumulator 15 includes a container 2 that forms the exterior of the main body, and an inflow pipe 3 and a U-shaped outflow pipe 4 that are provided so as to communicate with the inside of the container 2. The outflow pipe 4 is divided into a front flow portion 5 that is upstream of the gas refrigerant flow with respect to the U-shaped curved portion and a wake portion 6 that is downstream of the U-shaped curved portion. Only 5 is accommodated inside the container 2, and the wake portion 6 is configured to be outside the container 2.

  Further, by connecting the upper part of the rear flow part 6 and the upper part of the container 2 by the balance pipe 9, the space in the container 2 where the gas refrigerant 10 exists and the upper part of the rear flow part 6 of the outflow pipe 4 are connected. ing. Further, the lower part of the wake part 6 and the lower part of the container 2 are connected by an oil return pipe 14 to connect the space in the container 2 where the liquid refrigerant 11 exists and the lower part of the wake part 6 of the outflow pipe 4. doing.

  The return refrigerant discharged from the inflow pipe 3 may be mixed with the gas refrigerant and the liquid refrigerant. In this case, the liquid refrigerant 11 at the lower part of the container 2 and the gas refrigerant 10 at the upper part of the container 2 in the container 2. Gas-liquid separation. Since the suction port 7 is designed to be higher than the liquid level of the liquid refrigerant 11, the gas refrigerant 10 is returned from the suction port 7 to the compressor via the outflow pipe 4.

  The balance pipe 9 functions as a conventional balance hole. The oil return pipe 14 functions as an oil return hole. That is, in the refrigerant circuit, a part of the lubricating oil such as a compressor leaks out and circulates together with the refrigerant. Therefore, the lubricating oil is likely to stay in the container 2 in a state of being dissolved in the liquid refrigerant 11, However, the compressor or the like may run out of lubricating oil, but by using the flow of gas refrigerant in the outflow pipe 4, a small amount of liquid refrigerant 11 containing lubricating oil is gradually removed from the oil return pipe 14. I'm trying to go back.

  Instead of the oil return pipe 14, the capillary tube 12 shown in FIG. 2B may be used to communicate the lower part of the rear flow part 6 and the lower part of the container 2. By applying the capillary tube, the diameter of the capillary can be adjusted, and the amount of the liquid refrigerant 11 flowing into the outflow pipe 4 via the capillary tube can be adjusted. This is because the capillary tube can adjust the amount of flow by easy resistance adjustment.

  Further, instead of the oil return pipe 14, a pipe 13 with an opening degree adjusting valve shown in FIG. 2C may be used to communicate the lower part of the rear flow part 6 and the lower part of the container 2. By applying a pipe with an opening adjustment valve, the opening degree of the valve is adjusted manually or automatically to adjust the amount of liquid refrigerant 11 flowing into the outflow pipe 4 via the pipe with the opening adjustment valve. be able to.

  By applying the communication means shown in FIGS. 2 (b) and 2 (c) instead of the oil return pipe 14, the gas refrigerant 10 is supplied from the suction port 7 and the balance pipe 9 to the compressor regardless of the operating state of the refrigeration apparatus. It is possible to control the ratio of the amount of return to the compressor and the amount of the liquid refrigerant 11 containing lubricating oil that returns to the compressor from the capillary tube instead of the oil return pipe or the pipe with the opening adjustment valve. Moreover, since these communicating means are outside the container 2, the above-described control can be performed without using a complicated structure.

  Furthermore, both the balance pipe 9 and the oil return pipe 14 may be changed to a capillary tube 12 or a pipe 13 with an opening adjustment valve. In this case, the amount of the gas refrigerant 10 returning to the compressor and the amount of the liquid refrigerant 11 containing the lubricating oil returning to the compressor can be controlled independently, and these ratios can be controlled more appropriately. Can do. In particular, it is effective as an accumulator attached to a direct suction compressor.

It is an internal perspective schematic structure figure of the accumulator concerning a 1st embodiment. An enlarged view of part A in FIG. 1 (FIG. 1A), an embodiment communicated by a capillary tube (FIG. 1B), an embodiment communicated by a pipe with an opening adjusting valve (FIG. 1C) )). It is a see-through | perspective schematic structure figure of the accumulator which concerns on 2nd Embodiment. It is a schematic block diagram of the refrigerant circuit of the conventional vapor compression refrigeration apparatus. It is a Mollier diagram. It is an internal perspective schematic structure figure of an example of the conventional accumulator.

Explanation of symbols

1,15 Accumulator 2 Container 3 Inflow pipe 4 U-shaped pipe (outflow pipe)
DESCRIPTION OF SYMBOLS 5 Front flow part 6 Back flow part 7 Suction inlet 8 Oil return hole 9 Balance pipe 10 Gas refrigerant 11 Liquid refrigerant 12 Capillary tube 13 Pipe with opening degree adjustment valve 14 Oil return pipe

21 Four-way valve 22 Compressor 23 Indoor heat exchanger 24 Indoor fan 25 Outdoor heat exchanger 26 Outdoor fan
27a, 27b Expansion valve 28 Accumulator 29 Container 30 Inflow pipe 31 U-shaped pipe (outflow pipe)
32 Front-flow part 33 Back-flow part 34 Suction port 35 Oil return hole 36 Balance hole 37 Gas refrigerant 38 Liquid refrigerant

Claims (6)

In an accumulator having a container main body for storing a liquid refrigerant, an inflow pipe for introducing refrigerant from an evaporator into the container main body, and an outflow pipe for supplying gas refrigerant separated in the container main body to a compressor ,
The outflow pipe is a U-shaped accumulator comprising a front flow portion communicating with the inside of the container main body at a lower portion of the container main body and a rear flow portion extending upward at the outside of the container main body. . The accumulator according to claim 1,
An accumulator characterized in that an oil return hole is provided below the inside of the container main body in the upstream portion of the outflow pipe. The accumulator according to claim 1,
An accumulator characterized in that a first pipe that communicates a lower part of the container main body and a lower part of a wake part of the outflow pipe is provided. The accumulator according to claim 2 or 3,
The accumulator is characterized in that a second pipe that communicates the upper part in the container main body and the upper part in the wake part of the outflow pipe is provided. The accumulator according to claim 3 or 4,
The accumulator is characterized in that the first or second pipe is any one of a pipe, a capillary tube, and a pipe with an opening degree adjusting valve. In a refrigeration apparatus in which a compressor, a condenser, an expansion valve, an evaporator, and an accumulator are sequentially connected by a refrigerant flow path.
The refrigerating apparatus according to claim 1, wherein the accumulator is an accumulator according to claim 1.

Images