JP2014070869A - Accumulator - Google Patents

Abstract

An accumulator provided with a gas-liquid separation member is provided that can minimize the generation of noise due to the generation of bubbles.
SOLUTION: A tank body 2 provided with a refrigerant inflow hole 8 and a refrigerant outflow hole 9, and a gas-liquid separation member 16 for separating the refrigerant flowing in from the refrigerant inflow hole into a gas phase refrigerant, a liquid phase refrigerant and oil. And refrigerant outlet pipes 5 and 6 that are connected to the refrigerant outflow holes and guide the gas-phase refrigerant separated by the gas-liquid separation member to the refrigerant outflow holes, and oil collected in the bottom of the refrigerant outlet pipe. The accumulator 1 is provided with an oil return hole 24 that guides the refrigerant into the refrigerant outlet pipe, and the bag 7 containing the desiccant 7a is disposed in the gas phase space region above the tank body. The bag 7 can be accommodated in the cartridge 31, and this cartridge can be attached to the refrigerant outlet pipe via the upper frame member 30 and the lower frame member 22 formed integrally with the refrigerant outlet pipe.
[Selection] Figure 1

Description

  The present invention relates to an accumulator of a type in which a refrigerant circulating in a refrigeration cycle is gas-liquid separated and stored.

  A receiver tank, an accumulator, or the like is used to separate and store the refrigerant circulating in the refrigeration cycle. As this type of accumulator, for example, Patent Document 1 includes a housing, a pipe part disposed in the housing, a filter and an internal machine part such as a bag enclosing a desiccant, and the like. The refrigerant that has flowed into the interior collides with the cap portion as a gas-liquid separation member and is gas-liquid separated into a gas-phase refrigerant and a liquid-phase refrigerant containing oil, and the separated gas-phase refrigerant enters the pipe portion. The accumulator discharged from the outlet is described.

  Further, in Patent Document 2, a bottle-shaped body having an upper end opened, a main body (header) in which an opening end of the body is sealed and a refrigerant inflow hole and a refrigerant outflow hole are formed, and a lower body are arranged. The refrigerant flowing into the main body from the refrigerant inflow hole of the main body is converted into a swirling flow in the swirling portion, and the liquid refrigerant and the gas refrigerant are separated by centrifugal separation using the swirling flow. And an accumulator that is separated.

Japanese Utility Model Publication No. 57-2371 JP 2011-21773 A

  In the swivel type accumulator described in Patent Document 2, there is no particular problem. However, as described in Patent Document 1, a gas-liquid separation member is provided below the header in which the refrigerant inflow hole and the refrigerant outflow hole are formed. In the existing accumulator, there is a problem that bubbles are generated when the desiccant comes into contact with the liquid refrigerant accumulated in the lower part of the body, and the bubbles collide with the gas-liquid separation member to generate a large noise.

  Therefore, in view of the problems in the conventional technology, the present invention provides an accumulator that can minimize the generation of abnormal noise accompanying the generation of bubbles in an accumulator provided with a gas-liquid separation member. Objective.

  In order to achieve the above object, the present invention separates a tank body provided with a refrigerant inflow hole and a refrigerant outflow hole, and a refrigerant flowing in from the refrigerant inflow hole into a gas phase refrigerant, a liquid phase refrigerant, and oil. A gas-liquid separation member; a refrigerant outlet pipe connected to the refrigerant outflow hole and guiding the vapor-phase refrigerant separated by the gas-liquid separation member to the refrigerant outflow hole; and a bottom part of the refrigerant outlet pipe; A strainer that removes foreign matter contained in the phase refrigerant and oil, and an oil return hole that is provided at the bottom of the refrigerant outlet pipe and guides the oil accumulated in the tank main body into the refrigerant outlet pipe. A bag containing a desiccant is disposed in the upper gas phase space region.

  According to the present invention, since the bag containing the desiccant is disposed in the gas phase space region above the tank body, the liquid phase refrigerant stored in the tank body and the desiccant are prevented from contacting with each other to minimize the generation of bubbles. Even if bubbles are generated, the distance from the bubble generation position to the gas-liquid separation member is short, so that the bubbles can be prevented from colliding with the gas-liquid separation member vigorously. , The occurrence of abnormal noise can be minimized. Note that the gas phase space region refers to a region where gas phase refrigerant separated by the gas-liquid separation member mainly exists.

  In the above accumulator, a cartridge is provided for housing a bag containing the desiccant, and the refrigerant outlet pipe has an upper frame member formed at an upper portion and a lower frame member formed at a central portion, and the cartridge Has a groove on the lower surface, the lower frame member has a protrusion on the upper surface that engages with the groove, and the cartridge has a groove on the cartridge that engages a protrusion on the lower frame member, And it can mount | wear with the said refrigerant | coolant exit pipe | tube in the state clamped by the said upper frame member and the said lower frame member. Thereby, the bag which encloses a desiccant can be reliably fixed in a tank main body at low cost.

  In the above accumulator, a cartridge is provided for housing a bag containing the desiccant, and the refrigerant outlet pipe has an upper frame member formed at an upper portion and a lower frame member formed at a central portion, and the cartridge Has a protrusion on the lower surface, the lower frame member has a groove on the upper surface that engages with the protrusion, and the cartridge has a protrusion on the cartridge that engages with the groove on the lower frame member. And it can be attached to the refrigerant outlet pipe while being sandwiched between the upper frame member and the lower frame member. Thereby, the bag which encloses a desiccant can be reliably fixed in a tank main body at low cost.

  As described above, according to the present invention, in the accumulator including the gas-liquid separation member, the bag containing the desiccant is disposed and held in the gas phase space region below the gas-liquid separation member. It is possible to minimize the generation of sound.

It is a figure which shows one Embodiment of the accumulator which concerns on this invention, (a) is sectional drawing, (b) is the sectional view on the AA line of (a). It is a figure which shows the outer pipe shown in FIG. 1, (a) is sectional drawing, (b) is BB sectional drawing of (a), (c) is CC sectional drawing of (a), d) is a sectional view taken along line DD of FIG.

  Next, a preferred embodiment for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an embodiment of an accumulator according to the present invention. This accumulator 1 includes a tank body 2 composed of a body 3 and a header 4, an outer pipe 5, an inner pipe 6 and a tank body 2. It is composed of internal parts such as a cartridge 31 that accommodates the bag 7.

  The tank body 2 includes a bottomed cylindrical body 3 having an open upper end, and a header 4 that is welded to the body 3 via a welded portion 10 and seals the opening end of the body 3. The body 3 and the header 4 are both made of a metal such as an aluminum alloy.

  The header 4 is formed in a circular shape when viewed from above, and the refrigerant inflow hole 8 and the refrigerant outflow hole 9 open upward. The refrigerant outflow hole 9 communicates with the inner pipe 6.

  Below the header 4, a mixed refrigerant (refrigerant in which a gas phase component and a liquid phase component are mixed) from the refrigerant inflow hole 8 is mixed with a high-density liquid phase refrigerant and compressor oil (hereinafter referred to as “oil”), and a density. A gas-liquid separation member 16 that separates into a low gas phase refrigerant is provided in an inverted dish shape.

  Inside the body 3, an outer pipe 5 into which the gas-liquid separated gas-liquid refrigerant flows and an inner pipe 6 that guides the gas-phase refrigerant that has flowed into the outer pipe 5 to the refrigerant outlet hole 9 are disposed.

  The outer pipe 5 is made of synthetic resin and is joined to the body 3. The upper end portion 5a has a larger diameter than other portions so that the gas-phase refrigerant can easily flow in. An upper frame member 30 and a lower frame member 22 are integrally formed on the upper portion and the center portion of the outer pipe 5. On the upper surface of the upper frame member 30, as shown in FIGS. 2A and 2B, a plurality of reinforcing ribs 30a protruding upward are provided.

  The lower frame member 22 has an outer diameter corresponding to the inner diameter of the body 3, is radially formed in a top view, and is provided with a total of six reinforcing ribs 22 a protruding downward. In addition, a protrusion that extends from the outer periphery of the outer pipe 5 toward the tip of the lower frame member 22 is formed on a part of the upper surface of the lower frame member 22 as shown in FIGS. 22b is formed.

  As shown in FIG. 1 (a), a bag 7 containing a desiccant (hygroscopic agent) 7 a is accommodated in a cartridge 31. The cartridge 31 has a hole (not shown) for allowing the refrigerant to pass through on the upper and lower surfaces, and a groove 31a on the lower surface. The groove 31a engages with the protrusion 22b of the lower frame member 22, and the outer pipe 5 The outer pipe 5 is attached while being sandwiched between the upper frame member 30 and the lower frame member 22. The space above the lower frame member 22 is a gas phase space region, and the gas phase refrigerant separated by the gas-liquid separation member 16 mainly exists in this region.

  A pipe rib 23 that is in contact with the outer peripheral surface of the inner pipe 6 is integrally formed on the lower inner peripheral surface of the outer pipe 5. In addition, the bottom of the outer pipe 5 communicates with a strainer 20 for removing foreign matters contained in oil and liquid refrigerant, an oil return hole 24 for guiding the oil into the inner pipe 6, and an internal space of the body 3. A groove 26 is provided for allowing oil accumulated at the bottom of the body 3 to flow below the oil return hole 24.

  The inner pipe 6 is made of a metal such as an aluminum alloy, the lower end portion 6 a is opened, and the upper end portion 6 b is connected to the refrigerant outflow hole 9 of the header 4. Further, the lower part of the inner pipe 6 is fitted inside a pipe rib 23 projecting from the inner peripheral surface of the outer pipe 5, whereby the inner pipe 6 is stably held.

  Next, the operation of the accumulator 1 having the above configuration will be described with reference to FIG. In the following description, the accumulator 1 is disposed between the evaporator and the compressor of the refrigeration cycle, and moisture contained in the refrigerant from the evaporator is removed to generate a gas refrigerant, which is supplied to the compressor. The case of returning will be described as an example.

  When the refrigerant is discharged from the evaporator, it is conveyed to the accumulator 1 through a connection pipe (not shown). The refrigerant that has reached the accumulator 1 flows into the fuselage 3 through the refrigerant inflow hole 8, and then collides with the gas-liquid separation member 16, so that a high-density liquid-phase refrigerant and oil and a low-density gas-phase refrigerant (gas refrigerant). ) And are separated.

  The liquid-phase refrigerant and oil after the gas-liquid separation descend on the inner surface of the body 3 due to their own weight, and are stored in the bottom of the body 3. In the process, the separation of the liquid phase refrigerant and the oil proceeds, and the oil accumulates below the liquid phase refrigerant.

  Here, since the bag 7 containing the desiccant 7a is disposed above, the liquid-phase refrigerant stored in the body 3 and the desiccant 7a are difficult to come into contact with each other, and the generation of bubbles can be minimized. In addition, even if bubbles are generated, the distance from the bubble generation position to the gas-liquid separation member 16 is short, so that the bubbles can be prevented from colliding with the gas-liquid separation member 16 vigorously. Occurrence can be minimized.

  On the other hand, the gas-phase refrigerant after the gas-liquid separation flows into the outer pipe 5 through the inside of the gas-liquid separation member 16 and descends in the outer pipe 5. After that, it is folded at the bottom of the outer pipe 5 and flows into the inner pipe 6, rises in the inner pipe 6, and is guided to the refrigerant outflow hole 9. At this time, the oil accumulated at the bottom of the body 3 is removed by the strainer 20 through the oil return hole 24 and sucked, and guided to the refrigerant outflow hole 9 together with the gas-phase refrigerant. And the gaseous-phase refrigerant | coolant containing oil is discharged | emitted from the refrigerant | coolant outflow hole 9, and is conveyed to a compressor through connection piping (not shown).

  As described above, according to the present embodiment, in the accumulator 1 including the gas-liquid separation member 16, the generation of abnormal noise can be minimized. Further, if the cartridge 31 is not present, the bag 7 may hang down and may protrude into the refrigerant flow path and block it. However, by accommodating the bag 7 in the cartridge 31, the refrigerant flow path inside the body 3 can be sufficiently provided. Can be secured.

  In addition, in the said embodiment, although the case where a refrigerant | coolant exit pipe | tube was comprised with the double pipe | tube which consists of the inner pipe 6 and the outer pipe 5 was illustrated, this invention is applied also to an accumulator provided with a single refrigerant | coolant exit pipe | tube. It is possible.

  Further, in order to fix the cartridge 31, a protrusion 22b is provided on the upper surface of the lower frame member 22, and a groove 31a is provided on the lower surface of the cartridge 31, but conversely, a groove is provided on the upper surface of the lower frame member 22. Each of the protrusions may be provided on the lower surface.

DESCRIPTION OF SYMBOLS 1 Accumulator 2 Tank main body 3 Body 4 Header 5 Outer pipe 5a Upper end part 6 Inner pipe 6a Lower end part 6b Upper end part 7 Bag 7a Desiccant 8 Refrigerant inflow hole 9 Refrigerant outflow hole 10 Welding part 16 Gas-liquid separation member 20 Strainer 22 Lower frame Member 22a Reinforcing rib 22b Projection 23 Pipe rib 24 Oil return hole 26 Groove 30 Upper frame member 30a Rib 31 Cartridge 31a Groove

Claims (3)

A tank body provided with a refrigerant inflow hole and a refrigerant outflow hole;
A gas-liquid separation member that separates the refrigerant flowing in from the refrigerant inflow hole into a gas-phase refrigerant, a liquid-phase refrigerant, and oil;
A refrigerant outlet pipe connected to the refrigerant outflow hole and guiding the gas-phase refrigerant separated by the gas-liquid separation member to the refrigerant outflow hole;
A strainer provided at the bottom of the refrigerant outlet pipe to remove foreign substances contained in the liquid refrigerant and oil;
An oil return hole provided at the bottom of the refrigerant outlet pipe and guiding oil accumulated in the tank body into the refrigerant outlet pipe;
An accumulator comprising a bag containing a desiccant disposed in a gas phase space region above the tank body. A cartridge containing a bag containing the desiccant;
The refrigerant outlet pipe has an upper frame member formed at an upper portion and a lower frame member formed at a central portion,
The cartridge has a groove on the lower surface,
The lower frame member has a protrusion that engages with the groove on the upper surface,
The cartridge is mounted on the refrigerant outlet pipe in a state where a groove of the cartridge is engaged with a protrusion of the lower frame member and is sandwiched between the upper frame member and the lower frame member. The accumulator according to claim 1. A cartridge containing a bag containing the desiccant;
The refrigerant outlet pipe has an upper frame member formed at an upper portion and a lower frame member formed at a central portion,
The cartridge has a protrusion on the lower surface,
The lower frame member has a groove that engages with the protrusion on the upper surface,
The cartridge is mounted on the refrigerant outlet pipe in a state in which a protrusion of the cartridge engages with a groove of the lower frame member and is sandwiched between the upper frame member and the lower frame member. The accumulator according to claim 1.

Images