JP2008032270A - Accumulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an accumulator for securing the suction amount of lubricating oil stored in the lower part of a tank. <P>SOLUTION: A circular recessed portion 332 is formed in the lower part of a holder 330, and an oil return hole 333 is formed in the center of the recessed portion 332 for making the outer bottom face of the holder 330 communicate with the inner bottom face of the holder 330. In the recessed portion 332, deformation preventing ribs 334 are formed for preventing the deformation of a filter body 410 arranged on the side of the outer bottom face of the holder 330. The four deformation preventing ribs 334 radially extending from the oil return hole 333 are arranged at equal angle intervals around the oil return hole 333. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an accumulator that separates a refrigerant flowing into a tank into a liquid-phase refrigerant and a gas-phase refrigerant and causes oil stored in the tank to flow out together with the gas-phase refrigerant.

  As this type of accumulator, for example, the one described in Patent Document 1 is known. This supplies gas-phase refrigerant to a compressor arranged in the refrigeration cycle, and also supplies oil for compressor lubrication. The refrigerant that has flowed out of the evaporator flows into the tank and is separated into a liquid-phase refrigerant and a gas-phase refrigerant inside, and the liquid-phase refrigerant separated and assembled at the bottom of the tank is stored inside the tank, while at the top of the tank The rising vapor phase refrigerant passes through a U-shaped suction pipe having a refrigerant inlet at the upper part of the tank, flows out of the tank, and is sucked into the compressor.

When the refrigerant passes through the suction pipe, the oil stored in the lower part of the tank is sucked up from an oil return hole formed in the lower part of the suction pipe and sucked into the compressor together with the gas-phase refrigerant.
Japanese Patent Laid-Open No. 2002-5545

  By the way, the conventional apparatus is provided with a filter for removing sludge and the like from the oil sucked into the suction pipe so that the sludge and the like are not mixed into the oil sucked into the compressor. This filter has a configuration in which an opening is formed in a cylindrical strainer that encloses a suction pipe, and a mesh-like filter body is attached to the opening. A predetermined gap is formed between the filter body and the suction pipe. As a result, the oil stored in the lower part of the tank passes through the filter and is sucked into the suction pipe, so that the oil from which sludge and the like are removed is sucked into the suction pipe.

  When the oil is being sucked up, a stress on the oil return hole side acts on the filter, so the filter may be deformed to the oil return hole side. Then, when sludge or the like adheres to the filter, the sludge or the like closes the oil return hole, which causes a problem that the amount of oil sucked up cannot be secured.

  This invention is made | formed in view of the said situation, The objective is to provide the accumulator which can ensure the amount of oil suction.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided an accumulator for separating the refrigerant flowing into the interior into a gas-phase refrigerant and a liquid-phase refrigerant and causing the gas-phase refrigerant to flow out to the outside. Is separated into a vapor-phase refrigerant and a liquid-phase refrigerant, is connected to the outside through the lower part of the tank, and a suction pipe that allows the gas-phase refrigerant in the tank to flow out to the outside. The gas phase refrigerant is formed and passes through the suction pipe, so that a gap is provided between the oil return hole and the oil return hole that sucks the lubricating oil stored in the lower part of the tank into the suction pipe. And a filter main body that filters oil sucked into the suction pipe from the oil return hole, and a deformation prevention rib that prevents the filter main body from being deformed toward the suction pipe.

  According to the first aspect of the present invention, when oil is sucked into the suction pipe from the oil return hole, even if a force that deforms the suction pipe is applied to the filter, the deformation is prevented by the deformation prevention rib, and the suction pipe A gap is secured between the filter and the filter. Thereby, sludge or the like adhering to the filter does not block the oil return hole, and the amount of oil sucked up can be secured.

  The invention according to claim 2 is characterized in that a plurality of deformation preventing ribs are formed at equal angular intervals around the oil return hole. If comprised in this way, the deformation | transformation of the oil return hole vicinity of a filter can be prevented reliably.

  The invention according to claim 3 is characterized in that the deformation preventing ribs are radially formed around the oil return hole. According to the third aspect of the present invention, the flow of oil collected in the oil return hole can be made smooth, so that the amount of oil sucked up can be reliably ensured.

  In the invention of claim 4, the suction pipe is arranged in the outer pipe into which the gas-phase refrigerant in the tank flows and the outer pipe, and the inner side in which the gas-phase refrigerant that has passed through the outer pipe flows in and flows out of the case The pipe and the lower end of the outer pipe are held in a fitted state, and the inner pipe is arranged so as to enter the inside, and the gas phase refrigerant that has flowed out of the outer pipe flows into the inner pipe, and the bottom portion And a holder part for allowing oil sucked up by the gas-phase refrigerant to flow into the inner pipe, and the holder part is a displacement that restricts radial displacement of the inner pipe relative to the outer pipe. A limiting rib is formed.

  The invention of claim 4 is the structure of a double tube type accumulator. According to this, since the inner pipe does not move with respect to the outer pipe, the flow of the gas-phase refrigerant can be made smooth. Further, since the inner pipe does not move with respect to the holder, it is possible to avoid the inconvenience that the inner pipe interferes with the holder due to the flow of the gas-phase refrigerant or an external impact.

  The invention according to claim 5 is characterized in that a plurality of displacement limiting ribs are formed at equal angular intervals around the inner pipe. In this way, the displacement of the inner pipe can be reliably prevented.

  The invention according to claim 6 is characterized in that the displacement limiting rib is formed with an inclined portion having a divergent shape as the depth of entry increases in the direction of entry of the inner pipe with respect to the holder.

  According to the invention of claim 6, in the process of entering the inner pipe into the holder, the inclined portion is guided to the normal position in the holder, and therefore it is necessary to position the holder relative to the holder when the inner pipe is entered. Since there is no, assembly workability | operativity can be improved.

  In the invention of claim 7, a hook part is formed at the lower end of the holder part, the frame has a frame that is fixed to the holder part and holds the filter body, and the frame has a snap fit part that is locked to the hook part. It is characterized by being formed.

  According to the seventh aspect of the present invention, since the snap fit portion can be locked to the collar portion only by pressing the snap fit portion against the holder, the assembling workability can be improved.

  In the invention of claim 8, the suction pipe is formed of a U-shaped tube, and has a frame that is fixed to the U-shaped tube and holds the filter main body. It is characterized by being formed.

  According to the eighth aspect of the present invention, the snap-fit portion can be locked to the U-shaped tube simply by pressing the snap-fit portion against the U-shaped tube, so that the assembly workability can be improved.

<First Embodiment>
An embodiment in which an accumulator according to the present invention is applied to a refrigeration cycle for a vehicle will be described with reference to FIGS. FIG. 1 is an overall view of the refrigeration cycle. The compressor 1 is driven by an electromagnetic clutch 2 to compress the refrigerant and discharge the high-pressure gas-phase refrigerant to the condenser 3 side. The condenser 3 sends the high-temperature gas-phase refrigerant to the evaporator 5 after being cooled and condensed by exchanging heat with the outside air. Between the condenser 3 and the evaporator 5, a decompression device 4 that decompresses the liquid-phase refrigerant that has flowed out of the condenser 3 is disposed. It is expanded under reduced pressure to form a mist-like gas-liquid two-phase refrigerant. The evaporator 5 exchanges heat between the gas-liquid two-phase refrigerant ejected from the decompression device 4 and the outside air, and sends the refrigerant after heat exchange to the accumulator. Further, as is well known, the cold air heat-exchanged by the evaporator 5 is adjusted in temperature by a heater core (not shown) and then blown out into the passenger compartment.

  The accumulator 6 separates the refrigerant that has flowed out of the evaporator 5 into a liquid-phase refrigerant and a gas-phase refrigerant, and stores the liquid-phase refrigerant in the interior while storing the gas-phase refrigerant in the compressor 1 while being stored in the compressor 1 side. The lubricating oil for the compressor 1 is also discharged to the compressor 1 side.

  2 and 3 show the configuration of the accumulator 6. The accumulator 6 is provided inside the tank 100 with a distributor 200 for separating the liquid-phase refrigerant and the gas-phase refrigerant, a suction pipe 300 for allowing the separated gas-phase refrigerant to flow out to the compressor 1, and a refrigerant inside the tank 100. It is configured to contain resistance plates 510 and 520 for preventing the occurrence of a forming state in which the swivel turns.

  The tank 100 includes a tank body 110 and a header 120 that closes the upper end surface of the tank body 110. The tank body 110 has a bottomed cylindrical shape with an open upper end surface, and the distributor 200, the suction pipe 300, and the resistance plates 410 and 420 are accommodated therein. In addition, the separated liquid-phase refrigerant is stored in the lower portion of the tank body 110, and lubricating oil is stored in a state of being dissolved in the liquid-phase refrigerant.

  The header 120 is formed in a flat cylindrical shape having the same diameter as the tank main body 110, and a reduced diameter fitting portion 122 having the same shape as the opening shape of the tank main body 110 is provided under the header 120 via a stepped portion 121. Is formed. The reduced diameter fitting portion 122 is fitted into the tank body 110 with the stepped portion 121 in contact with the peripheral wall of the tank body 110.

  A circular coolant outlet 123 that opens in the vertical direction is formed at the center of the header 120. The refrigerant outlet 123 is connected to the compressor 1 through a pipe so that the gas-phase refrigerant separated in the tank main body 110 can flow out to the compressor 1. A circular refrigerant inlet 124 that opens in the vertical direction is also formed outside the refrigerant outlet 123. The refrigerant inlet 124 is connected to the evaporator 5 through a pipe so that the refrigerant heat-exchanged in the evaporator 5 can flow into the tank main body 110.

  The distributor 200 housed in the tank body 110 is formed in an umbrella shape, and an opening hole 220 larger than the opening of the refrigerant outlet 123 is formed in the central portion of the circular top plate surface 210. Yes. The top plate surface 210 is fixed to the lower surface of the header 120 with the opening hole 220 aligned with the refrigerant outlet 123.

  Further, the peripheral side wall 230 extending downward from the outer edge of the top plate surface 210 is inclined and extended to the vicinity of the inner wall of the tank main body 110, and the peripheral side wall 230 appears when the tank main body 110 is viewed from the refrigerant inlet 124. It is in a state.

  The suction pipe 300 is a double pipe type, and in this embodiment, the suction pipe 300 includes an inner pipe 310, an outer pipe 320, and a holder 330. Both the inner pipe 310 and the outer pipe 320 are straight pipes and are housed in the tank body 110 in an upright posture, so that the inner pipe 310 and the outer pipe 320 are coaxial as shown in the figure. The inner pipe 310 is arranged in the outer pipe 320.

  Among these, the inner pipe 310 is fixed to the lower surface of the header 120. Specifically, the upper end portion of the inner pipe 310 is connected to the lower surface of the header 120 with the opening and the refrigerant outlet 123 aligned. It is fixed.

  Further, the lower end portion of the outer pipe 320 is held by the holder 330 arranged at the lower portion of the tank body 110, and the inner pipe 310 is arranged inside as described above, and the upper end portion 320A of the outer pipe 320 is provided. Are in a state of entering the distributor 200 with a predetermined gap between the opening and the distributor 200.

  The holder 330 is formed in a bottomed cylindrical shape. As shown in FIG. 4, a thin-walled portion 330A is formed at the upper end of the side wall of the holder 330, and an outer pipe 320 is fitted into the thin-walled portion 330A. In addition, the inner pipe 310 enters the holder 330 in a state where a gap with the inner bottom surface of the holder 330 is maintained.

  Displacement limiting ribs 331 that limit the radial displacement of the inner pipe 310 relative to the outer pipe 320 are formed inside the holder 330. Three displacement limiting ribs 331 are formed on the inner peripheral surface of the holder 330 at an equiangular interval centering on the center portion of the holder 330 (centering on the inner pipe 310) (see FIG. 5). The projecting dimension to the is such that a predetermined gap is provided when the inner pipe 310 enters the holder 330. An inclined portion 331A is formed on the upper portion of the displacement limiting rib 331, and the projecting dimension toward the center of the holder 330 is increased toward the lower side. That is, the inclined portion 331 </ b> A has a divergent shape as the depth of entry increases in the direction of entry of the inner pipe 310 with respect to the holder 330. Thereby, in the process in which the inner pipe 310 enters the holder 330, the inner pipe 310 is guided to the radial center position in the holder 330.

  Accordingly, the gas-phase refrigerant that has risen to the upper portion of the tank body 110 enters the inside from the opening of the upper end portion 320A of the outer pipe 320, descends the outer pipe 320, enters the inside from the opening on the lower end side of the inner pipe 310, and enters the inner side. The pipe 310 is raised and flows out from the refrigerant outlet 123 to the compressor 1 side.

  A circular recess 332 is formed in the lower portion of the holder 330, and an oil return hole 333 that communicates the outside and the inside of the holder 330 is formed at the center of the recess 332. The oil return hole 333 sucks the lubricating oil stored in the lower portion of the tank body 110 into the holder 330 by the gas phase refrigerant flowing into the inner pipe 310 and allows the oil pipe to pass through the inner pipe 310 together with the gas phase refrigerant. ing.

  Further, a deformation preventing rib 334 for preventing deformation of the filter main body 410 described later is formed in the recess 332. The deformation prevention ribs 334 are radially extended from the oil return holes 333, and the deformation prevention ribs 334 are arranged at equiangular intervals around the oil return holes 333 (see FIG. 6). . Further, the downward projecting dimension of each deformation preventing rib 334 is set to be substantially flush with the outer bottom surface of the holder 330.

  In addition, a circular flange 335 for fixing a filter 400 (to be described later) to the lower side of the holder 330 is formed below the holder 330.

  The filter 400 is for removing sludge and the like from oil sucked into the holder 330 from the oil return hole 333, and includes a filter body 410 and a frame 420.

  The filter main body 410 is composed of a mesh-shaped film body and is disposed on the outer bottom surface side of the holder 330. The filter body 410 is sized to cover the entire recess 332 of the holder 330, and all of the lubricating oil from the lower part of the tank body 110 toward the oil return hole 333 passes through the filter body 410. Yes. The filter main body 410 has a function of allowing the lubricating oil to pass through the oil return hole 333 while prohibiting the passage of sludge and the like contained in the lubricating oil.

  The frame 420 has a configuration in which a peripheral wall 422 is provided on the outer edge of the base portion 421 having an annular shape, and the filter main body 410 is disposed between the base portion 421 and the outer bottom surface of the holder 330. . In addition, the peripheral wall 422 is formed with two snap-fit portions 430 that are engaged with the flange portion 335 so as to face each other. The snap-fit portion 430 is engaged with the flange portion 335 so that the filter 400 is held in the holder. 330 is fixed. In the fixed state, the base 421 and the peripheral wall 422 are in close contact with the holder 330 so that the lubricating oil can reach the oil return hole 333 only through the filter body 410.

  Further, four spacers 421A are formed on the lower surface of the base portion 421 at equal intervals in the circumferential direction, and the spacers 421A are used for flowing lubricating oil between the tank body 110 and the filter body 410. The road is secured.

  The resistance plates 510 and 520 are formed in a disk shape, and through holes 511 and 521 having the same shape as the outer diameter shape of the outer pipe 320 are formed, and the outer pipe 320 is passed through the respective through holes 511 and 521. ing. Therefore, the resistance plates 510 and 520 are disposed in the tank body 110 so as to face each other in the vertical direction, and the positional relationship between them is such that the resistance plate 510 is on the upper side and the resistance plate 520 is on the lower side.

  Further, the outer edges of the resistance plates 510 and 520 are in contact with the inner peripheral wall of the tank main body 110, whereby the outer pipe 320 and the holder 330 are accommodated in the tank main body 110 in a positioned state.

  Each of the resistance plates 510 and 520 has a plurality of passage holes 512 and 522 formed at equal intervals in the circumferential direction with the through holes 511 and 521 as the center, and allows passage of the refrigerant. There are two types of passage holes 512 formed in the resistance plate 510. A relatively small small diameter passage hole 512A is formed on the inside, and a relatively large large diameter passage hole 512B is formed on the outside. Further, the resistance plate 520 is formed with the same number of small diameter passage holes 522 as the small diameter passage holes 512A formed in the resistance plate 510 as many as the number of small diameter passage holes 512A formed in the resistance plate 510. Yes. Therefore, when the flow resistances of the resistance plates 510 and 520 are compared, the flow resistance of the resistance plate 510 disposed on the upper side is smaller than the flow resistance of the resistance plate 520 disposed on the lower side.

  The configuration of the present embodiment is as described above, and the operation thereof will be described subsequently. The refrigerant that has flowed out of the evaporator 5 flows into the tank body 110 from the refrigerant inlet 124. The refrigerant flowing into the tank main body 110 is separated into gas and liquid by the peripheral side wall 230 of the distributor 200, the liquid phase refrigerant is separated and collected at the lower part of the tank main body 110, and the gas-phase refrigerant is inward from the outer pipe 320 as described above. It passes through the pipe 310 and flows out from the refrigerant outlet 123 to the compressor 1 side. When the gas-phase refrigerant flows out of the outer pipe 320 and flows into the inner pipe 310, the lubricating oil stored in the lower portion of the tank body 110 is sucked into the holder 330 through the oil return hole 333, The refrigerant flows out from the refrigerant outlet 123 to the compressor 1 side through the inner pipe 320 together with the refrigerant.

  When the gas-phase refrigerant passes through the inner pipe 310 and the outer pipe 320, the lower part of the inner pipe 310 may be displaced due to the flow of the gas-phase refrigerant, but the amount of displacement due to the displacement limiting rib 331 is displaced from the inner pipe 310. It is limited to a dimension corresponding to a gap with the limiting rib 331.

  In the lower part of the tank body 110, the lubricating oil sucked into the holder 330 from the oil return hole 333 passes through the filter body 410 and enters the recess 332, and then enters the oil return hole 333 while avoiding the deformation prevention rib 334. Gather. When the lubricating oil passes through the filter main body 410, a force for deforming the filter main body 410 toward the holder 330 acts, but the deformation preventing rib 334 prevents the deformation toward the holder 330. As a result, a predetermined gap is maintained between the filter body 410 and the oil return hole 333.

  Further, when the lubricating oil that has reached the recess 332 gathers in the oil return hole 333, the lubricating oil flows from each position of the recess 332 to the central oil return hole 333. Since it forms radially centering on the return hole 333, the lubricating oil flows smoothly without blocking the flow of the lubricating oil.

  As described above, according to the present embodiment, the deformation preventing rib 334 prevents the deformation of the filter main body 410 and the clearance is secured between the holder 330 and the filter main body 410. Even if sludge or the like is concentrated and adhered to a position corresponding to the hole 333, the oil return hole 333 is not blocked by the sludge or the like, and the amount of lubricating oil sucked up can be secured.

  Further, since a plurality of deformation prevention ribs 334 are formed radially at equal angular intervals around the oil return hole 333, it is possible to reliably prevent deformation of the filter body 410 near the oil return hole 333. At the same time, the flow of lubricating oil that collects in the oil return hole 333 can be made smooth to ensure the amount of oil sucked up.

  In addition, since a plurality of displacement restriction ribs 331 for restricting the displacement of the inner pipe 310 are provided, the inner pipe 310 can be prevented from excessively shifting in the holder 33, and the flow of the gas-phase refrigerant can be made smooth. Can do. Further, since the displacement limiting ribs 331 are formed radially, the pressure loss can be reduced without hindering the flow of the gas-phase refrigerant. Further, it is possible to avoid the inconvenience that the inner pipe 310 interferes with the holder 330 due to the flow of the gas-phase refrigerant and the impact from the outside.

  Further, the inclined portion 331A formed on the displacement limiting rib 331 is guided to the center position of the holder 330 together with the depth of entry when the inner pipe 331 is advanced into the holder 330 when the accumulator 6 is assembled. In addition, it is not necessary to assemble the inner pipe 310 in a state where the inner pipe 310 is positioned with respect to the holder 330 in advance, and assembling workability can be improved.

  In addition, since the filter 400 is attached to the holder 300 by locking the snap-fit portion 430 to the flange portion 335, both the 300 and 400 can be assembled simply by pressing the filter 300 against the holder 330. Thus, assembly workability can be improved.

<Modification>
Hereinafter, modifications of the deformation preventing rib 334 will be described with reference to FIGS. Each figure is a view when the holder 330 is viewed from below, and the configuration other than the oil return hole 333 and the deformation prevention rib 334 is omitted. In (A), a deformation preventing rib 334 is formed in a circle so as to surround the oil return hole 333. In (B), three deformation prevention ribs 334 are formed radially around the oil return hole 333. (C) shows two deformation preventing ribs 334 formed on both sides of the oil return hole 333 so as to face each other. (D) shows a pin-shaped deformation preventing rib 334 formed around the oil return hole 333. (E) shows a spiral deformation prevention rib 334 formed around the oil return hole 333.

<Second Embodiment>
A second embodiment of the accumulator will be described with reference to FIG. 8 or FIG. In addition, about the same part as the said embodiment, the overlapping description is abbreviate | omitted and only a different point is demonstrated. In this embodiment, a U-shaped tube 350 is used as the suction pipe 300, and a filter 500 having a snap fit portion is attached to the lower portion of the U-shaped tube 350.

  As shown in FIG. 8, one end side of the U-shaped tube 350 is disposed in the distributor 200, and the other end side communicates with the refrigerant outlet 123. An oil return hole 333 is formed in the lowest end portion of the curved region so as to open in the lateral direction, and the filter 500 is attached to a position corresponding to the oil return hole 333.

  As shown in FIG. 9, the filter 500 has a substantially U shape, and the upper and lower arms serve as a snap fit portion 510. A deformation preventing rib 520 extending toward the oil return hole 333 along the shape of the U-shaped tube 350 is formed at the base portion of the snap fit portion 510 in a state where a predetermined gap is maintained with the curved base portion 530. Yes. A mesh-shaped filter body 540 is slid into the gap between the deformation preventing rib 520 and the base 530. Therefore, the lubricating oil can reach the oil return hole 333 through the filter body 540 from the opening hole 531 formed in the base portion 530.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

  In the first embodiment, the filter 400 is attached to the holder 330 using the snap-fit portion 430. For example, a plurality of pins are erected on the peripheral wall 422, and the distal end portion of the pin is a flange portion. It is good also as a structure bent and crimped to the 335 side. In the second embodiment, the pin may be crimped to the U-shaped tube 350.

  In the first embodiment, the projecting dimension of the displacement limiting rib 331 is such that a gap is formed between the displacement restricting rib 331 and the inner pipe 310. However, the projecting dimension is extended to a state where there is no gap. May be.

  In the first embodiment, the configuration in which the three displacement limiting ribs 331 are formed is shown. However, the inner piping 310 may be configured by two or four or more as long as the inner piping 310 can be positioned at a predetermined position. .

  Further, in the first embodiment, the configuration in which the displacement limiting rib 331 is provided with the inclined portion 331A is shown, but the configuration in which the inclined portion 331A is omitted may be used.

It is the block diagram which showed the whole structure of the refrigerating cycle. It is the perspective view which showed the whole structure of the accumulator. It is sectional drawing which showed the whole structure of the accumulator. It is an enlarged view which shows A area | region in FIG. It is the B direction arrow directional view which showed the positioning state of the inner side piping in a holder in FIG. It is a C direction arrow directional view which shows the shape of a deformation | transformation prevention rib in FIG. It is a C direction arrow view which shows the modification of a deformation | transformation prevention rib, (A) forms the deformation prevention rib in a circle so that an oil return hole may be surrounded. (B) is one in which three deformation prevention ribs are formed radially around the oil return hole. (C) is one in which two deformation prevention ribs are formed on both sides of the oil return hole so as to face each other. (D) shows a pin-shaped deformation prevention rib formed around the oil return hole. (E) shows a spiral deformation prevention rib formed around the oil return hole. It is the longitudinal cross-sectional view which showed the whole structure of the accumulator which concerns on 2nd Embodiment. It is the DD sectional view taken on the line which showed the assembly | attachment state of the filter in FIG.

Explanation of symbols

6 ... Accumulator 100 ... Tank 110 ... Tank body 120 ... Header 123 ... Refrigerant outlet 124 ... Refrigerant inlet 200 ... Distributor 300 ... Suction pipe 310 ... Inner pipe 320 ... Outer pipe 330 ... Holder 331 ... Displacement limiting rib 331A ... Inclination Part 333 ... oil return hole 334 ... deformation prevention rib 335 ... flange 400 ... filter 410 ... filter body 420 ... frame 421 ... base 422 ... peripheral wall 430 ... snap fit part 510, 520 ... resistance plate 512A ... large diameter passage hole 512B, 522 ... Small diameter passage hole

Claims (8)

An accumulator for separating the refrigerant flowing into the interior into a gas-phase refrigerant and a liquid-phase refrigerant and causing the gas-phase refrigerant to flow outside,
A tank in which the refrigerant is separated into the gas phase refrigerant and the liquid phase refrigerant;
A suction pipe that leads to the outside through the tank lower part, and causes the gas-phase refrigerant in the tank to flow outside;
An oil return hole that is formed on the tank lower side of the suction pipe, and the gas-phase refrigerant passes through the suction pipe to suck up lubricating oil stored in the tank lower part into the suction pipe;
A filter body that is disposed in a state of providing a gap between the oil return hole and filters the oil sucked into the suction pipe from the oil return hole;
An accumulator comprising a deformation preventing rib for preventing deformation of the filter body toward the suction pipe.   The accumulator according to claim 1, wherein a plurality of the deformation prevention ribs are formed at equiangular intervals with the oil return hole as a center.   The accumulator according to claim 2, wherein the deformation preventing ribs are radially formed around the oil return hole. The suction pipe is
An outer pipe into which the gas-phase refrigerant in the tank flows,
An inner pipe arranged in the outer pipe and through which the gas-phase refrigerant that has passed through the outer pipe flows and flows out of the case;
The lower end of the outer pipe is held in a fitted state, and the inner pipe is arranged to enter the inner pipe, and the gas-phase refrigerant that has flowed out of the outer pipe flows into the inner pipe. The oil return hole is formed in the bottom, and the holder portion for allowing the oil sucked up by the gas-phase refrigerant to flow into the inner pipe,
The accumulator according to any one of claims 1 to 3, wherein a displacement limiting rib for limiting a radial displacement of the inner pipe with respect to the outer pipe is formed in the holder portion.   The accumulator according to claim 4, wherein a plurality of the displacement limiting ribs are formed at equal angular intervals around the inner pipe.   The inclined part which becomes a divergent shape with the increase in the penetration depth is formed in the displacement restriction rib in the approach direction of the inner pipe with respect to the holder. accumulator. A collar is formed at the lower end of the holder part,
Having a frame fixed to the holder part and holding the filter body;
The accumulator according to any one of claims 4 to 6, wherein a snap fit portion that engages with the flange portion is formed on the frame. The suction pipe is composed of a U-shaped tube,
A frame fixed to the U-tube and holding the filter body;
The accumulator according to any one of claims 1 to 3, wherein a snap fit portion that engages with the U-shaped tube is formed on the frame.

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