JPH10267467A - Capacitor with liquid tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce the brazing part of the base edge part of a mounting bracket and to prevent a header from being deformed by brazing the base edge part of the mounting bracket for mounting and fixing a liquid tank to one header out of a pair of headers to a part near a sheet piece that is installed at one portion of one header. SOLUTION: A capacitor 2 that is included between the compressor of an air conditioner for automobile and an evaporator is constituted of, for example, a pair of headers 6a and 6b and a plurality of heat transfer pipes 7. Then, a gas-shaped refrigerant being discharged from a compressor is condensed and liquefied by the heat exchange with air, and the liquid-shaped refrigerant is stored in a liquid tank 3 and then is sent to the evaporator. The liquid tank 3 is fixed to the outer surface of the header 6b via a mounting bracket 26. However, in this case, the mounting bracket 26 is formed while it has a base edge part 27, a plane part 29, and a winding part 30, and the base edge part 27 is brazed and fixed to the outer-periphery surface of the header 6b near a part where a screening plate 12 being provided in the header 6b is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The condenser with a liquid tank according to the present invention is incorporated between a compressor and an evaporator of a vapor compression refrigerator constituting an air conditioner for an automobile. Then, after the refrigerant compressed by the compressor is radiated and condensed, foreign substances such as moisture are removed and then sent to an evaporator.

[0002]

2. Description of the Related Art A vapor compression refrigerator is incorporated in an automotive air conditioner for cooling and dehumidifying the interior of an automobile.
FIG. 10 is described in JP-A-4-95522.
It is a circuit diagram showing the basic composition of a vapor compression refrigerator. The high-temperature, high-pressure gaseous refrigerant discharged from the compressor 1 exchanges heat with the air outside the vehicle cabin while passing through the condenser 2 to lower the temperature and condense and liquefy. The resulting liquid refrigerant is once stored in the liquid tank 3, and then decompressed by passing through the expansion valve 4, is sent to the evaporator 5 in the form of a mist, and evaporates in the evaporator 5. Since the temperature of the evaporator 5 decreases due to deprivation of the latent heat of steam, if air conditioning air is allowed to flow through the evaporator 5, the temperature of the air is reduced,
The water vapor contained in the air can be removed. The refrigerant evaporated and vaporized in the evaporator 5 is sucked by the compressor 1 and compressed, and the above cycle is repeated again.

[0003] Conventionally, a liquid tank 3 constituting such a vapor compression refrigerator of an air conditioner for a vehicle is generally constructed independently of the condenser 2 by a condenser 2.
And the evaporator 5 in the middle of the pipe. However, when the liquid tank 3 is configured separately from the condenser 2 as described above, not only does the space for installing the liquid tank 3 increase, but also the liquid tank 3 is
It is necessary to attach to the vehicle body with sufficient vibration resistance separately and independently from the capacitor 2, which is troublesome.

In order to eliminate such trouble, for example, FIG.
As shown in FIG. 1, a structure is known in which the liquid tank 3 and the capacitor 2 are connected to each other so that they can be handled integrally. The capacitor 2 constituting this structure has a pair of tubular headers 6a and 6b which are arranged in the vertical direction (vertical direction in FIG. 11) at an interval in the horizontal direction (horizontal direction in FIG. 11). . The pair of headers 6a, 6
b, a plurality of flat tubular heat transfer tubes 7, 7 and corrugated fins 8,
8 are alternately arranged in the vertical direction to constitute the core portion 9. Both ends of each of the heat transfer tubes 7, 7 penetrate the pair of headers 6 a, 6 b in a gas-tight and liquid-tight manner, respectively, and pass the respective inner passages to these headers 6 a, 6 b
It communicates with the inside. Side plates 10 and 11 are provided on both upper and lower sides of the core portion 9, respectively, and both end portions of these side plates 10 and 11 are connected and fixed to the upper and lower end inner surfaces of the headers 6a and 6b, respectively. The inside of each of the headers 6a and 6b is
Partition plates 12 and 12 are installed to stop the flow of the refrigerant that is fed from an inlet pipe 13 described later and flow toward a refrigerant transfer pipe 14 that is also described later and change the flow direction, and the inside of each of these headers 6a and 6b is installed. , Each partitioned into multiple rooms.

In the condenser 2 constructed as described above, the refrigerant flowing in the heat transfer tubes 7 and the relatively low-temperature outside air flowing outside the heat transfer tubes 7 in the core portion 9 are formed. Heat is exchanged to condense and liquefy the refrigerant. That is, the gaseous refrigerant sent from the inlet pipe 13 provided at the upper end of the one header 6a moves between the one header 6a and the other header 6b in the direction of the arrow in FIG. It flows through each of the heat transfer tubes 7 constituting the part 9 and condenses and liquefies during the flow. The resulting liquid refrigerant accumulates at the lower end of the other header 6b and is sent from the refrigerant transfer pipe 14 to the liquid tank 3.

On the other hand, the liquid tank 3 is connected and supported on the outer side of the other header 6b. That is, the cylindrical case main body 15 constituting the liquid tank 3 is disposed close to the header 6b, and the case main body 15 is supported and fixed to the outer surface of the header 6b via the mounting bracket 16. The refrigerant transfer pipe 14 has one end fixed to the lower end of the header 6b by brazing or the like in a state of being communicated with the inside of the header 6b. The other end of the refrigerant transfer pipe 14 is fixed to an upper end surface of the case main body 15 by a joint (not shown) in a state of communicating with the inside of the case main body 15.

[0007] The mounting bracket 16 is provided at the base end 1.
7, a flat portion 18 and a winding portion 19. The base end portion 17 is formed in an arc shape that abuts along the outer peripheral surface of the header 6b, and is fixed to the outer surface of the header 6b by brazing or the like. Further, the flat portion 18 is provided continuously from the base end portion 17, and the winding portion 19 is provided continuously from the distal end portion of the flat portion 18. Then, the winding portion 19 is wound around the case main body 15 to hold the case main body 15. That is, the distal end portion of the wrapping portion 19 comes into contact with the flat portion 18 and is fixedly connected to the flat portion 18 by the connecting screw 20 to hold and fix the case body 15.

In order to construct the above-described structure, the refrigerant transfer pipe 14 and the base end 17 of the mounting bracket 16 are
The work of brazing and fixing to the header 6b is performed simultaneously with the brazing of the capacitor 2 formed by combining the above members.
Perform in a heating furnace. One or both parts to be brazed to each other are formed of a so-called clad material in which a brazing material is laminated on the surface of a core material. The brazing material for brazing is supplied from a brazing material layer laminated on the surface of the clad material.
The attachment and support of the case body 15 to the header 6b by the mounting bracket 16 is performed after the brazing. The upper and lower ends of the headers 6a, 6b are air-tightly and liquid-tightly closed by lids 21, 21 brazed to the headers 6a, 6b.

When using the condenser with a liquid tank configured as described above (during operation of the vapor compression refrigerator),
As described above, the refrigerant flowing as indicated by the arrow in FIG. 11 is condensed and liquefied in the condenser 2 and then sent to the liquid tank 3. Then, a clean liquid refrigerant, from which water and foreign matters are removed in the liquid tank 3 and separated from the uncondensed gaseous refrigerant, flows from the outlet pipe 40 through the expansion valve 4 (FIG. 10).
Sent out to. Since the condenser with a liquid tank configured and operated in this manner can handle the condenser 2 and the liquid tank 3 integrally, it is easy to install the condenser 2 in a limited space inside the engine room. It is not necessary to independently secure the vibration resistance with the above, and the installation work can be facilitated.

[0010]

However, in the capacitor with a liquid tank constructed and operated as described above, when the mounting bracket 16 is fixed to the other header 6b, no particular consideration is given to the fixing portion. A part of the header 6b was fixed to the outer side surface of the cavity away from the partition plate 12. The header 6b made of an aluminum alloy
May not necessarily have sufficient rigidity against a force directed inward in the cross-sectional direction. For this reason, if the weight of the liquid tank 3 is applied as a moment load to the outer surface of the header 6b via the mounting bracket 16 due to the vibration applied when the vehicle travels,
A part of the outer surface of the header 6b is used to mount the mounting bracket 1
There is a possibility that a portion where the base end portion 17 of 6 is fixed by brazing may be deformed.

Of course, if the thickness of the header 6b is ensured, such deformation can be prevented. However, making the thickness of the header 6b unnecessarily large increases the cost of materials due to an increase in material costs. In addition to this, it is not preferable because it leads to an increase in the weight of the condenser with a liquid tank. According to the present invention, in order to prevent such deformation, the base end portion 17 of the header 6b is selected by selecting a portion of the header 6b having sufficient rigidity against a force directed inward in the diameter direction of the cross section. Then, the mounting bracket 16 is joined and fixed.

[0012]

A capacitor with a liquid tank according to the present invention comprises a pair of headers which are arranged in the vertical direction at intervals in the horizontal direction, similarly to the conventional capacitor with a liquid tank described above. A plurality of heat transfer tubes arranged in the horizontal direction at intervals in the vertical direction, one end of which is connected to one header of the pair of headers, and the other end of which is connected to the other header; A fin sandwiched between adjacent heat transfer tubes, a partition plate provided in the one header, a mounting bracket having a base end brazed and fixed to an outer peripheral surface of the one header, and the mounting bracket And a liquid tank supported and fixed to the distal end of the liquid tank. In particular, in the capacitor with a liquid tank of the present invention, the base end of the mounting bracket is diametrically inward from the inner peripheral surface of the header by a part of the one header and a part of the one header. It is characterized in that it is brazed and fixed to a portion in the vicinity of a plate piece installed in a state of protruding from the plate piece.

[0013]

The capacitor with a liquid tank of the present invention is constructed as described above, so that the brazing portion at the base end of the mounting bracket supporting the liquid tank is reinforced by a plate piece, and the inside of the cross section in the diameter direction is reduced. This is a portion having sufficient rigidity against the force directed toward the. Therefore, even if the weight of the liquid tank is applied as a moment load to the outer surface of the header via the mounting bracket as the vehicle travels,
The moment load is sufficiently supported to prevent the header from being deformed.

[0014]

1 to 6 show a first embodiment of the present invention. Capacitors 2 are arranged in a pair with headers 6a and 6b vertically spaced apart from each other in the horizontal direction, and with headers 6a and 6b spaced apart in the vertical direction. A plurality of heat transfer tubes 7, 7 having the other end connected to one header 6 b and the other header 6 a respectively, and a corrugated type sandwiched between these vertically adjacent heat transfer tubes 7, 7. It comprises fins 8, 8 and partition plates 12, 12 provided in the headers 6a, 6b.

The headers 6a and 6b are each formed of a tubular electric resistance welded pipe whose outer peripheral surface is coated with a brazing material. As shown in FIGS. 2 and 3, a semicircular slit-shaped notch 22 is formed in a portion where the partition plate 12 which is a plate piece is to be provided. As shown in FIG. 4, the partition plate 12 has a thickness that allows the partition plate 12 to be inserted into the cutout portion 22 of the header 6b without a large gap. The partition plate 12 has a small-diameter semicircular portion 23 having an outer peripheral edge substantially matching the inner peripheral surface of the header 6b, and a large-diameter semicircular arc portion having an outer peripheral edge almost matching the outer peripheral surface of the header 6b. The part 24 is continuous with the step part. As shown in FIG. 5, such a partition plate 12 brings the outer peripheral edge of the small-diameter side semi-circular portion 23 into contact with or close to the inner peripheral surface of the header 6b, and
4 and the above-mentioned notch 2
The inside of the header 6b is axially closed by contacting or approaching the edge portion 2 and closing the contacting or approaching portion in a gas-tight and liquid-tight manner by brazing.

The liquid tank 3 comprises a cylindrical case body 15 having upper and lower ends sealed, and a filter (not shown) such as a filter and a desiccant contained in the case body 15. Then, the liquid tank 3 is attached to the outside of the one header 6b by a mounting bracket 26 in which the case main body 15 is brazed and fixed to the outer surface of the one header 6b near the portion where the partition plate 12 is installed. It is fixed to the side. Thus, the mounting bracket 26
The header 6 b and the liquid tank 3, which are connected and fixed to each other, are connected to each other by a refrigerant transfer pipe 14.

The mounting bracket 26 for connecting and fixing the liquid tank 3 to the outer side surface of the header 6b has a width dimension enough to secure sufficient rigidity for supporting the liquid tank 3. Such a mounting bracket 26
Is provided following the base end portion 27 in an arc shape, which is in contact with and abuts on the outer surface of the header 6b,
A flat portion 29 having a concave groove 28 at an intermediate portion;
9, a winding portion 30 which is wound around the case main body 15 of the liquid tank 3 and holds the case main body 15; It comprises a groove 28 and a flat portion 32 having a concave groove 31 at a portion corresponding to the groove 28. A screw hole (not shown) is formed in a part of the flat part 32, and a through hole (not shown) is formed in a part of the flat part 29 which is aligned with the screw hole. I have.

A notch 33 is formed at an intermediate portion of the base end portion 27 to prevent interference between the base end portion 27 and the outer peripheral edge of the large-diameter semicircular arc portion 24 of the partition plate 12. ing. That is, the outer peripheral edge of the large-diameter side semicircular arc portion 24 and the inner peripheral edge of the notch 22 formed in the header 6b for inserting the partition plate 12 will be laminated on both surfaces of the partition plate 12. The brazing material is removed from the header 6 by preventing the material from flowing away.
In order to spread to the brazing portion between b and the partition plate 12, welding is performed prior to brazing. At the outer peripheral edge of the large-diameter side semicircular arc portion 24, a build-up portion based on this welding is formed as a ridge 25 and exists in a state of protruding from the outer peripheral surface of the header 6b. The notch 33 is formed in a state avoiding the ridge 25, and when brazing the base end portion 27 and the header 6b, the inner peripheral surface of the base end portion 27 and the header 6b are formed.
And the outer peripheral surface thereof can be in close contact with each other.

The mounting bracket 26 formed as described above
Brazes the base end portion 27 to the outer peripheral surface of the header 6b near the portion where the partition plate 12 is installed. Then, after the brazing, the case body 15 of the liquid tank 3 is wound by the winding portion 30, and at the same time, the intermediate portion of the refrigerant transfer pipe 14 is formed in the concave groove 28 formed in the intermediate portion of each of the flat portions 29 and 32. , 31. Then, the case main body 15 is held and fixed inside the wrapped portion 30 by screwing the coupling screws 34, 34 inserted into the through holes into the screw holes and further tightening, and the liquid tank 3 is fixed. The capacitor with a liquid tank according to the present invention is fixedly connected to the header 6b.

In the capacitor with a liquid tank of the present invention constructed as described above, the portion where the base end 27 of the mounting bracket 26, which supports the liquid tank 3, is brazed to the header 6b is a plate piece. It is a portion reinforced by a certain partition plate 12 and has sufficient rigidity against a force directed inward in the diameter direction of the cross section. Therefore, even if the weight of the liquid tank 3 is applied as a moment load to the outer surface of the header 6b via the mounting bracket 26 as the vehicle travels, the partition plate 12 is added to the partition plate 12 in addition to the header 6b itself. The moment load is sufficiently supported to prevent the header 6b from being deformed. In the case of the illustrated embodiment, the mounting bracket 26 is formed with the concave grooves 28 and 31 for holding the refrigerant transfer pipe 14, so that the positioning and fixing of the refrigerant transfer pipe 14 can be performed by special parts for holding. Can be performed reliably without the need for

Next, FIGS. 7 to 9 show a second embodiment of the present invention. In the case of this example, one header 6b for connecting and fixing the liquid tank 3 has a partition plate 12 provided inside the lower portion of the header 6b and a flow rate adjusting plate 35 provided inside the upper portion of the header 6b. As shown in FIG. 8, the flow rate adjusting plate 35 has a thickness substantially equal to the height of the cutout portion 22 (see FIG. 2) of the header 6b, and the inner peripheral surface of the header 6b, as shown in FIG. A small-diameter-side semicircular arc portion 23 having an outer peripheral shape substantially matching with the header 6;
The large-diameter-side semicircular arc portion 24 having an outer peripheral edge shape substantially coinciding with the outer peripheral surface of b is made continuous by a step portion.

In particular, in the case of this example, the two semicircular arc portions 2
A circular hole 36 having a size that allows (does not impede) the passage of the refrigerant is formed in a central portion extending over the regions 3 and 24. The flow control plate 35 is brazed and fixed inside the upper portion of the header 6b in the same manner as the partition plate 12. In the case of the structure of the present example in which such a flow control plate 35 is provided, the refrigerant fed from the inlet pipe 13 flows almost evenly through the plurality of heat transfer tubes 7, 7, and the circular hole of the flow control plate 35 is formed. 3
6 and move downward (partition plate 12 side).

The mounting bracket 37 for supporting and fixing the liquid tank 3 includes an arc-shaped base end portion 27 which is brazed and fixed to the outer peripheral surface of the header 6b, a flat portion 29 continuous from the base end portion 27, and A winding portion 30 continuous from the tip of the flat portion 29, and the flat portion 29
And a plane portion 32 formed in a state corresponding to the above.
A concave relief groove 38 is formed on the inner peripheral surface of the intermediate portion of the inner surface of the base end portion 27 instead of the cut 33 in the case of the first example.

The base end 27 of the mounting bracket 37 incorporated in the structure of the present embodiment formed as described above is
In the vicinity of the portion where the header 5 is installed, the outer peripheral surface of the header 6b is brazed and fixed. After the brazing and fixing, the wrapped portion 30 is wrapped around the case body 15 of the liquid tank 3 and a pair of flat portions 29 and 32 are matched with each other. 3
The liquid tank 3 is fixed by connecting and fixing the two.
Is supported and fixed to the header 6b to form a capacitor with a liquid tank according to the present invention.

Also in the case of the structure of this embodiment having such a configuration, the mounting bracket 37 which supports the liquid tank 3 is provided.
A portion where the base end portion 27 is brazed to the header 6b is reinforced by a flow rate adjusting plate 35 which is a plate piece, and has a sufficient rigidity against a force directed inward in a diametrical direction of a cross section. ing. Therefore, even if the weight of the liquid tank 3 is applied as a moment load to the outer surface of the header 6b via the mounting bracket 37 as the vehicle travels, the flow rate adjusting plate 35 is added to the header 6b itself. The moment load is sufficiently supported to prevent the header 6b from being deformed. In the illustrated example, since the escape groove 38 is formed in the base end portion 27 of the mounting bracket 37 instead of the cut, the mounting strength to the header 6b and the strength of the base end portion 27 are increased. Also, refrigerant transfer pipe 1
4 is a holding plate 3 provided separately from the mounting bracket 37.
9, the flat part 32 of the mounting bracket 37
It is fixed with screws. The connecting screws 34, 34 for screwing and fixing are also used as screws for connecting the pair of flat portions 29, 32 to each other.

In each of the illustrated embodiments, a semicircular slit-shaped notch 22 is provided in a part of the header 6b, and the partition plate 12 or the flow rate adjusting plate 35 is provided in the notch 22.
The structure for inserting and brazing was shown. However, the structure for carrying out the present invention is not limited to the illustrated embodiment. For example, a partition plate or a flow rate adjusting plate having an outer peripheral shape matching the inner peripheral surface shape of the header is inserted into the header from the open end of the tubular header not having the cutout portion 22 to a predetermined position. After that, the outer peripheral edge of the partition plate or the flow rate adjusting plate and the inner peripheral surface of the header can be fixed by brazing. Further, the present invention can be practiced with a structure in which the halves of the two cracks in the diameter direction of the cross section are centered and brazed together. In this case, a partition plate or a flow rate adjusting plate having an outer peripheral edge shape that matches the inner peripheral surface shape of the header is sandwiched between the inner peripheral surfaces of the pair of halves. Furthermore, a structure formed by bending a two-piece aluminum alloy plate or a single aluminum alloy plate material into a tubular shape is disclosed in Japanese Patent Application Laid-Open No. 7-314035. The present invention can also be implemented with a structure in which a part of the plate is deformed inward in the diameter direction of the cross section of the header, and this deformed portion is used as a partition plate or a flow rate adjusting plate.

[0027]

The condenser with a liquid tank according to the present invention is constructed and operated as described above, so that the fixing portion at the base end of the mounting bracket supporting and fixing the liquid tank is reinforced by the partition plate. For this reason, the liquid tank is not only securely fixed, but also the weight of the liquid tank is applied to the mounting bracket by a part of the header due to a moment load applied via the mounting bracket based on the vibration of the vehicle during traveling. The fixed portion can be prevented from being deformed. Accordingly, the durability and reliability can be improved without increasing the weight of the liquid tank-equipped capacitor. Further, by reducing the thickness of the header, cost and weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a first example of an embodiment of the present invention.

FIG. 2 is a partial sectional view of a header constituting a capacitor incorporated in the first example.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a perspective view of a partition plate.

FIG. 5 is a view similar to FIG. 3, showing a state in which a partition plate is installed in a cutout portion of the header.

FIG. 6 is an enlarged perspective view of a portion B in FIG. 1;

FIG. 7 is a schematic perspective view of a main part showing a second example of the embodiment of the present invention.

FIG. 8 is a perspective view of a flow rate adjusting plate incorporated in the second example.

9 is an enlarged perspective view of a part C in FIG. 7;

FIG. 10 is a circuit diagram of a vapor compression refrigerator in which a condenser and a liquid tank are incorporated.

FIG. 11 is a schematic perspective view showing an example of a conventional condenser with a liquid tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Liquid tank 4 Expansion valve 5 Evaporator 6a, 6b Header 7 Heat transfer tube 8 Fin 9 Core part 10, 11 Side plate 12 Partition plate 13 Inlet pipe 14 Refrigerant transfer pipe 15 Case main body 16 Mounting bracket 17 Base end part 18 Flat portion 19 Winding portion 20 Coupling screw 21 Lid 22 Notch portion 23 Small-diameter side semi-arc portion 24 Large-diameter side semi-circular portion 25 Convex strip 26 Mounting bracket 27 Base end portion 28 Groove groove 29 Flat portion 30 Winding portion 31 Concave portion Groove 32 Flat portion 33 Cut 34 Coupling screw 35 Flow rate adjustment plate 36 Circular hole 37 Mounting bracket 38 Escape groove 39 Suppression plate 40 Outlet pipe

Claims (3)

[Claims] 1. A pair of headers which are respectively arranged in a vertical direction with a space in a horizontal direction, and a pair of headers which are respectively arranged in a horizontal direction with a space in a vertical direction and one end of which is one of the pair of headers. A plurality of heat transfer tubes each having the other end connected to the other header, a fin sandwiched between vertically adjacent heat transfer tubes, and a partition plate provided in the one header. And a mounting bracket having a base end brazed and fixed to the outer peripheral surface of the one header, and a liquid tank provided with a liquid tank supported and fixed to the distal end of the mounting bracket. A container with a liquid tank, characterized in that a base end portion is brazed and fixed to a part of a plate piece which is installed on a part of the one header so as to project radially inward from the inner peripheral surface of the header. Densa. 2. The condenser with a liquid tank according to claim 1, wherein the plate piece is a partition plate for partitioning one of the headers in an air-tight and liquid-tight manner. 3. The condenser with a liquid tank according to claim 1, wherein the plate piece has a flow hole and is a flow rate adjusting plate that allows passage of the refrigerant.