JP3629819B2 - Condenser with integrated receiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid receiver-integrated condenser having a liquid receiver that incorporates a filter that removes foreign matters such as dust in a refrigerant as an integrated structure, and is suitable for use in an air conditioner for an automobile.
[0002]
[Prior art]
Conventionally, as a condenser of a refrigeration cycle in an automotive air conditioner, a receiver integrated condenser having a receiver as an integral structure has already been proposed in, for example, US Pat. No. 5,419,141. Yes.
It has also been conventionally proposed to incorporate a filter that removes foreign matters such as dust in the refrigerant in a liquid receiver integrated with the condenser.
[0003]
This prior art has a configuration in which a cylindrical filter is detachably attached to the inner bottom of the liquid receiver by a screw portion.
[0004]
[Problems to be solved by the invention]
However, in the above prior art, since the flow of the refrigerant is concentrated on the bottom side of the cylindrical filter, foreign matters such as dust removed from the refrigerant are easily concentrated on the bottom side of the filter, and the filter is broken. An increase in pressure loss or the like may occur, and the filter performance may be reduced in a short period of time.
[0005]
The present invention has been made in view of the above points, and an object thereof is to ensure filter performance over a long period of time.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs the following technical means.
In invention of Claims 1-5, the liquid receiver integrated condenser which integrated the liquid receiver (3) which isolate | separates the gas-liquid of a refrigerant | coolant, and guide | induces a liquid refrigerant | coolant,
In the liquid receiver (3), the filter (12) is arranged so that the liquid refrigerant from the refrigerant inlet (9) toward the refrigerant outlet (10, 11c) passes,
The filter (12) is formed into a cylindrical shape having a refrigerant inlet (12e) on the upper side of the liquid receiver (3), and a filter surface for removing foreign matters is formed on the cylindrical circumferential surface. (12a) is arranged,
The refrigerant that has flowed in from the refrigerant inlet (12e) on the upper side of the filter (12) passes through the filter surface (12a) in the radial direction, and the cylindrical internal space of the filter (12) It is characterized by partitioning into a plurality of spaces so as to form parallel refrigerant flow paths.
[0007]
In this way, since the cylindrical internal space of the filter (12) is partitioned into a plurality of spaces, the refrigerant flows almost evenly through the plurality of parallel refrigerant flow paths, so that the foreign matter captured by the filter (12) Widely distributed over the entire filter surface (12a). For this reason, as in the prior art, it is possible to eliminate the phenomenon that foreign matter concentrates on a specific location in the internal space of the filter (12). Therefore, the specific location on the filter surface (12a) is broken or the pressure loss increases rapidly. And the like, and the performance of the filter (12) can be guaranteed over a long period of time.
[0008]
In the invention according to claim 3, the filter (12) is provided with an upper plate (12c) and a lower plate (12d) disposed at both upper and lower ends of the cylindrical shape, and the upper plate (12c) and the lower plate (12d). ) And a partition plate (12g) that partitions the filter internal space, and the filter surface (12a) is a cylindrical circumferential surface between the plurality of column members (12b). Arranged to form
Further, the upper plate (12c), the lower plate (12d), the column member (12b), and the partition plate (12g) are made of resin, and the filter surface is constituted by a mesh member (12a), and this mesh member (12a) is integrally formed with an upper plate (12c), a lower plate (12d), a plurality of column members (12b), and a partition plate (12g).
[0009]
Therefore, according to the invention described in claim 3, the filter (12) can be easily molded at low cost by integral molding of resin.
Further, in the invention described in claim 4, a lid member (13) is provided that is detachably sealed in an opening (11) provided at the bottom of the liquid receiver (3), and this lid member (13) The filter (12) is detachably installed in the liquid receiver (3).
[0010]
Thereby, the filter (12) can be taken out from the receiver (3) by detaching the lid member (13), and the filter (12) can be inspected and replaced.
The invention according to claim 5 is characterized in that the filter (12) is integrally coupled to the lid member (13).
Thereby, at the time of inspection and replacement of the filter (12), the filter (12) can be taken out integrally with the lid member (13), and the removal of the filter (12) is further simplified.
[0011]
In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description later mentioned.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments shown in the drawings will be described below.
(First embodiment)
FIG. 1 shows a main part of an embodiment of a condenser integrated with a receiver according to the present invention. The condenser 1 is applied to a refrigeration cycle of an air conditioner for an automobile. As is well known, it is composed of a closed circuit in which a compressor, a condenser 1, a temperature-actuated expansion valve (pressure reduction means), an evaporator, and the like are sequentially connected by refrigerant piping.
[0013]
The receiver-integrated condenser 1 is attached to the vehicle body via a mounting bracket (not shown) so as to be located in a location where it is easy to receive traveling wind in the engine room of the automobile, usually on the front side of the radiator for cooling the engine coolant. It is attached.
The liquid receiver integrated condenser 1 condenses and supercools the high-temperature and high-pressure gas refrigerant discharged from the compressor by exchanging heat with outdoor air. The liquid device 3 and the supercooling unit 4 are provided integrally. The components of these parts 2, 3, and 4 are all made of aluminum and are manufactured by integrally brazing in a furnace.
[0014]
The heat exchanging unit 1a of the condenser 1 includes the condensing unit 2 and the supercooling unit 4, and the condensing unit 2 is disposed on the upper side and the supercooling unit 4 is disposed on the lower side. The condensing unit 2 and the supercooling unit 4 include a plurality of tubes 5 and corrugated fins 6 extending in the horizontal direction, and these are joined by brazing.
The plurality of tubes 5 are formed into an oval shape with a flat cross-sectional shape by extruding aluminum, and a plurality of refrigerant channels (not shown) are formed in parallel inside.
[0015]
The header tank 7 has a substantially cylindrical shape extending in the vertical direction at the left end portion of the heat exchanging portion 1a, and the left end portions of the plurality of tubes 5 are open. In addition, although not shown in figure, the same header tank is arrange | positioned also at the right end part of the heat exchange part 1a, and the right end part of the some tube 5 is opening.
A partition plate 8 is arranged inside the header tank 7, and the partition plate 8 partitions the internal space of the header tank 7 in the vertical direction. In the heat exchange unit 1 a, the condensing unit 2 is formed on the upper side of the partition plate 8, and the supercooling unit 4 is formed on the lower side of the partition plate 8. A partition plate is also arranged at the same position as the partition plate 8 in the right end header tank (not shown) to partition the condensing unit 2 and the supercooling unit 4.
[0016]
In the header tank 7, a first communication hole (refrigerant inlet) 9 is opened immediately above the partition plate 8, and the tube 5 of the condensing unit 2 is received through the header tank 7 through the communication hole 9. It communicates in the liquid container 3. An arrow A in FIG. 1 indicates the flow of refrigerant flowing from the condensing unit 2 through the communication hole 9 into the liquid receiver 3.
The liquid receiver 3 serves as gas-liquid separation means for separating the refrigerant flowing into the interior from the condensing unit 2 into a gas refrigerant and a liquid refrigerant and supplying only the liquid refrigerant to the supercooling unit 4. Therefore, in the header tank 7, a second communication hole 10 and a third communication hole 11 c are opened at a portion located near the bottom in the liquid receiver 3 below the partition plate 8, and received by the communication holes 10 and 11 c. A portion near the bottom in the liquid vessel 3 is communicated with the supercooling unit 4 via the header tank 7. In the present example, the second communication hole 10 and the third communication hole 11c constitute the refrigerant outlet of the liquid receiver 3.
[0017]
The liquid receiver 3 is formed in a cylindrical shape extending in the vertical direction along the header tank 7, and is configured by joining an aluminum cylindrical body 3 a to the outer surface side of the header tank 7. is there. An aluminum cylindrical member 11 having an internal thread 11a is joined to the lower end of the cylindrical body 3a and the outer surface of the header tank 7, and the cylindrical member 11 is joined to the inner surface of the cylindrical body 3a and the header tank. The filter holding part 11b which protrudes cylindrically between the outer surfaces of 7 is integrally formed. In the filter holding portion 11b, the third communication hole 11c is opened at a portion facing the second communication hole 10.
[0018]
A refrigerant outlet pipe (not shown) is provided at the lower end portion of the header tank (not shown) at the right end portion for leading the supercooled liquid refrigerant that has passed through the supercooling portion 4 to the outside of the condenser 1.
Next, the filter 12 constituting the main part of the present invention will be described in detail. FIG. 2 is a diagram showing the filter 12 disposed in the liquid receiver 3 and removing foreign matters such as dust in the refrigerant as a single unit. Reference numeral 12 denotes a resin material such as nylon or polyester having excellent resistance to deterioration against compressor lubricating oil and refrigerant, and heat resistance, and is formed into a substantially cylindrical shape as a whole.
[0019]
And the filter 12 is arrange | positioned in the cylindrical filter holding | maintenance part 11b as shown in FIG. 1, and flows into the receiver 3 like the arrow A through the 1st communicating hole 9, Then, the arrow B As described above, the refrigerant flowing into the supercooling section 4 passes through the second communication hole 10 and the third communication hole 11c.
The filter 12 is provided with a fine mesh member (mesh member) 12a constituting a filter surface for removing foreign matters such as dust in the refrigerant. The mesh member 12a is disposed on a cylindrical circumferential surface, and the refrigerant passes radially outward as indicated by the arrow B. The mesh member 12a is supported by four column members 12b arranged at intervals of 90 °, and the upper and lower end surfaces of the mesh member 12a and the four column members 12b are the upper plate 12c and the lower plate 12c, respectively. It is supported by the plate 12d.
[0020]
The upper plate 12c has a ring shape, and a central portion thereof constitutes a refrigerant inflow hole 12e. Further, the outer edge portion 12f of the upper plate 12c forms a sealing surface that is crimped to the stop portion 11c at the upper end portion of the filter holding portion 11b.
The lower plate 12d has a disk shape and is placed on the upper surface of a filter mounting plug (lid member) 13 described later.
[0021]
Furthermore, the cylindrical internal space of the filter 12 is partitioned into a plurality of spaces so as to form a plurality of parallel refrigerant flow paths. That is, as shown in FIG. 2 (a), four partition plates 12g heading toward the center of the cylindrical shape are integrally formed from the above-described four column members 12b. The refrigerant that has flowed into the 12 cylindrical inner spaces flows in parallel through the refrigerant flow passages divided into four equal parts by the four partition plates 12g.
[0022]
As a manufacturing method of the filter 12, first, a fine mesh member 12a is formed in advance into two flat plates with a resin such as nylon, and then the two flat mesh members 12a are formed into a mold. It arrange | positions so that it may connect in a cylindrical shape inside, insert-molds each part 12b-12g and the mesh member 12a which were mentioned above with this shaping | molding die, and the whole filter 12 is integrally molded.
[0023]
As shown in FIG. 1, a desiccant 14 that absorbs moisture in the refrigerant is disposed above the filter 12. This desiccant 14 contains water-absorbing granular zeolite in a breathable bag.
The filter mounting plug 13 has a male screw 13a screwed into the female screw 11a of the cylindrical member 11, a hexagonal hole 13b for inserting and locking a plug detaching tool, and a sealing O-ring 13c. It is made of metal.
[0024]
The receiver 1 integrated condenser 1 is assembled by integral brazing with the filter 12, the desiccant 14 and the plug 13 removed from the receiver 3 portion. After the assembly, the desiccant 14 and the filter 12 are inserted into the liquid receiver 3 in this order from the lower end opening of the cylindrical member 11, and then the plug 13 is screwed into the female screw 11 a of the cylindrical member 11. The outer edge portion 12f of the upper plate 12c is pressed against the stop portion 11c at the upper end portion of the filter holding portion 11b. The plug 13 is fixed to the cylindrical member 11 with an O-ring 13c.
[0025]
Next, the operation of this embodiment in the above configuration will be described.
The operation of the automotive air conditioner is started, and the discharged gas refrigerant from the compressor first flows into the condensing and condensing unit 2, where the refrigerant is cooled and condensed by exchanging heat with cooling air, It becomes a saturated liquid refrigerant containing a part. This saturated liquid refrigerant flows into the liquid receiver 3 through the first communication hole 9 via the header tank 7 as shown by the arrow A, and the gas-liquid of the refrigerant is separated here. At the same time, moisture in the refrigerant is removed by the desiccant 14.
[0026]
Then, the liquid refrigerant flows into the internal space of the filter 12 from the refrigerant inflow hole 12e of the upper plate 12c of the filter 12. Since the internal space of the filter 12 is divided into four equal parts by the partition plate 12g, the liquid refrigerant flows almost evenly through the four equal refrigerant refrigerant channels in the filter 12 and passes through the mesh member 12a of the filter 12 in the radial direction. Pass outwards.
Foreign matter such as dust in the refrigerant is captured and removed by the mesh member 12a. Here, the fineness (size of the opening) of the mesh member 12a is preferably about 120 μm.
[0027]
In the foreign matter removing action of the filter 12, if there is no flow path partition by the partition plate 12g, the refrigerant flow concentrates in the direction toward the second and third communication holes 11c and 10 in the internal space of the filter 12, so that the mesh Of the shaped member 12a is concentrated in the portions facing the second and third communication holes 11c, 10 and the mesh-like member 12a is broken, the pressure loss is increased, and the performance of the filter 12 is shortened. There is a risk of lowering between.
[0028]
However, according to the present embodiment, since the refrigerant flows almost evenly through the refrigerant passages divided into four equal parts partitioned by the partition plate 12g as described above, foreign matter is concentrated on only a part of the mesh member 12a. Therefore, the above-mentioned problem can be avoided and the performance of the filter 12 can be guaranteed for a long period of time.
Then, the liquid refrigerant that has passed through the mesh member 12a of the filter 12 flows into the supercooling section 4 through the second and third communication holes 11c and 10 and the header tank 7, where it is cooled again and passed. To be cooled. Thereafter, the supercooled liquid refrigerant flows out of the condenser 1.
(Second Embodiment)
FIG. 3 shows a second embodiment, in which a male screw 12h is protruded from the center of the lower surface of the lower plate 12d of the filter 12, while a female screw 13d into which the male screw 12h is screwed is formed on the plug 13. FIG. In this way, the filter 12 and the plug 13 are integrally connected in advance, and the filter 12 and the plug 13 can be integrally attached to and detached from the liquid receiver 3. Therefore, the filter 12 can be easily removed integrally with the plug 13 when the filter 12 is inspected or replaced.
(Third embodiment)
FIG. 4 shows a third embodiment. An O-ring 12i is added to the outer edge portion 12f of the upper plate 12c of the filter 12, and the outer edge portion 12f of the upper plate 12c of the filter 12 and the upper end portion of the filter holding portion 11b. The sealing effect with the stop portion 11c is enhanced. Thereby, the flow of the refrigerant that bypasses the filter 12 can be more reliably prevented. In FIG. 4, in order to illustrate the mesh member 12a, the sectional view of the partition plate 12g is omitted.
(Other embodiments)
The present invention is not limited to the above-described embodiment and can be variously modified. For example, in the above-described embodiment, the mesh member 12a of the filter 12 is made of resin, but is made of metal. You can also.
[0029]
Moreover, a felt-like thing can also be used instead of the mesh member 12a. Alternatively, the mesh member 12a of the resin filter 12 and the aluminum plug 13 may be integrally formed by insert molding without forming the filter 12 and the plug 13 as separate parts.
Further, as a mounting structure of the filter 12, instead of screwing with the plug 13, a thin metal cap may be used, and the filter 12 may be mounted by caulking and fixing the cap.
[0030]
Moreover, the filter 12 may not be cylindrical as shown in FIG.
Moreover, even if the condenser 1 has only the condensing part 2 and does not have the supercooling part 4, the present invention can be similarly implemented.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view showing a main part of a receiver-integrated condenser according to a first embodiment of the present invention.
2A is a top view of the filter shown in FIG. 1, and FIG. 2B is a front view of FIG.
FIG. 3 is an assembly diagram of a filter and a mounting plug according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional view of a filter showing a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Liquid receiver integrated condenser, 2 ... Condensing part, 3 ... Liquid receiver, 4 ... Supercooling part,
9 ... 1st communicating hole (refrigerant inlet), 10, 11c ... 2nd, 3rd communicating hole (refrigerant outlet),
12 ... Filter, 12a ... Mesh member (filter surface), 12b ... Column member,
12c ... Upper plate, 12d ... Lower plate, 12e ... Refrigerant inflow hole, 12g ... Partition plate,
13: Mounting plug (lid member).

Claims (5)

A condenser (1) having a condensing part (2) for condensing the refrigerant is integrated with a liquid receiver (3) for separating the gas-liquid of the refrigerant condensed in the condensing part (2) and leading out the liquid refrigerant. In the receiver-integrated condenser,
A refrigerant inlet (9) that opens into the receiver (3) and into which the refrigerant condensed in the condenser (2) flows;
In the liquid receiver (3), provided at a position below the refrigerant inlet (9), a refrigerant outlet (10, 11c) for leading out the liquid refrigerant in the liquid receiver (3);
The liquid receiver (3) includes a filter (12) that is arranged so that liquid refrigerant from the refrigerant inlet (9) toward the refrigerant outlet (10, 11c) passes and removes foreign matters in the refrigerant. ,
The filter (12) is formed in a cylindrical shape having a refrigerant inlet (12e) on the upper side of the liquid receiver (3), and a filter surface for removing foreign substances ( 12a) is arranged,
The refrigerant flowing from the refrigerant inlet (12e) on the upper side of the filter (12) passes through the filter surface (12a) in the radial direction,
Furthermore, the cylindrical internal space of the filter (12) is partitioned into a plurality of spaces so as to form a plurality of parallel refrigerant flow paths. The filter (12) includes an upper plate (12c) and a lower plate (12d) disposed at both upper and lower ends of the cylindrical shape, and a plurality of column members (a plurality of column members (12d) connecting the upper plate (12c) and the lower plate (12d)). 12b) and a partition plate (12g) for partitioning the internal space,
The receiver integrated condenser according to claim 1, wherein the filter surface (12a) is disposed so as to form a cylindrical circumferential surface between the plurality of column members (12b). vessel. The upper plate (12c), the lower plate (12d), the column member (12b), and the partition plate (12g) are made of resin,
The filter surface includes a mesh member (12a), and the mesh member (12a) includes the upper plate (12c), the lower plate (12d), the column member (12b), and the partition plate (12g). The receiver integrated condenser according to claim 2, wherein the condenser is integrally formed with the condenser. A lid member (13) that is detachably sealed to an opening (11) provided at the bottom of the liquid receiver (3);
The liquid receiver according to any one of claims 1 to 3, wherein the filter (12) is detachably installed in the liquid receiver (3) by the lid member (13). Integrated condenser. The receiver-integrated condenser according to claim 4, wherein the filter (12) is integrally coupled to the lid member (13).

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