JP2001124439A - Condenser with supercooling unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condenser with a supercooling unit adapted to mounting in the engine room of an automobile for an automotive air conditioner capable of being reduced in the area of the front surface of a core and easily changed in response to the space state of the installing part of the assembling state by the same constituting member. SOLUTION: The condenser with a supercooling unit comprises a condenser body 1 having a plurality of heat exchanging pipelines 4,... disposed in parallel between a pair of headers 11 and 12 to form a core 10 so that a refrigerant flowing from a refrigerant inlet 7a flows in a zigzag manner through the core 10 to heat exchange with the atmosphere, a receiver tank 3 for introducing the refrigerant after heat exchanging, and the supercooling unit 2 having a heat exchanging pipeline 21 for supercooling a liquid refrigerant flowing out from the tank 3 by heat exchanging with the atmosphere and introducing the refrigerant to a refrigerant outlet 7b in such a manner that the unit 2 is disposed at the front surface of the core 10 through prackets 9, 9 provided at both side headers 11, 12 of the body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser with a supercooler used for a cooling mechanism for a car air conditioner.

[0002]

2. Description of the Related Art Generally, a cooling mechanism of a car air conditioner or the like cools and condenses a high-temperature and high-pressure gas refrigerant discharged from a compressor in a compressed state by heat exchange with outside air in a condenser, and forms a gas-liquid mixed state by a receiver. It is stored in a tank, and only the liquid refrigerant is sent from the receiver tank to the evaporator as a low-pressure / low-temperature atomized state via an expansion valve, and is evaporated and gasified by heat exchange with vehicle interior air and sent to the compressor. It discharges heat inside the vehicle to the outside of the vehicle. And, as the above-mentioned condenser, a plurality of heat exchange pipelines each having both ends connected to both headers are arranged in parallel between a pair of headers to constitute a core portion, and the refrigerant flowing from the refrigerant inlet is divided into the headers on both sides. A multi-flow type in which heat exchange is performed in a process of meandering through a core portion is often used.

On the other hand, in recent years, in a cooling mechanism for a car air conditioner, a second heat exchanger (subcooler) is interposed downstream of a receiver tank, and the liquid refrigerant is cooled by a condensing temperature by the subcooler. Refrigeration that superheats the liquid refrigerant to a temperature lower by about 2 to 5 ° C. to increase the heat dissipation of the liquid refrigerant, sends the liquid refrigerant to the evaporator in the supercooled state, and increases the enthalpy difference in the evaporator to increase the cooling efficiency. The system was developed.

Further, as a condenser employed in this refrigeration system, a condenser having a structure in which an original condenser and a subcooler (subcooler) are integrated has been proposed (Japanese Patent Laid-Open No. Hei 4-1992).
No. 92714, No. 4-227436, No. 9-1708
No. 53, 9-170854, Heikai 6-36912
Issue publications). These are a part of the outlet side flow path in the multi-flow type condenser is an independent supercooler by partitioning both side headers, and the refrigerant after heat exchange by the condenser flows into the receiver tank through the pipe, and the receiver The liquid refrigerant in the tank is introduced into a subcooler, supercooled, and guided to a refrigerant outlet.

[0005]

However, in the condenser with a supercooler of the proposed example, since a part of the flow path on the outlet side in the multi-flow condenser is configured as the supercooler, the condenser in the condenser is not used. In order to secure sufficient heat exchange efficiency, the area of the front of the core is inevitably large, which requires a large installation space in the vertical and horizontal directions, which necessitates changes in the layout and design of peripheral devices. May be done. In particular, when a condenser for a car air conditioner is used, the condenser is installed in a narrow engine room, which hinders downsizing of the engine room and makes it difficult to employ the condenser depending on the type of vehicle.

In view of the above circumstances, the present invention provides a condenser with a supercooler having a function of sending condensed refrigerant to the evaporator side in a sufficiently supercooled state, thereby making it possible to reduce the area of the front surface of the core portion, and thereby reduce the vertical or horizontal The installation space in the left and right direction is small, and the same components can be used to easily change the assembly form according to the space conditions of the installation part. It is intended to provide.

[0007]

In order to achieve the above object, a condenser with a supercooler according to the present invention comprises a plurality of headers having both ends connected to both headers between a pair of spaced apart and opposed headers. A heat exchange pipe line is arranged in parallel to form a core part, a refrigerant body flowing in a meandering manner through the core part by a partition in both headers and flowing heat from the refrigerant inlet to exchange heat with outside air, and a condenser body A receiver tank that introduces the refrigerant after heat exchange by the heat exchanger, and a subcooler that has a heat exchange pipe that guides the liquid refrigerant derived from the receiver tank to the refrigerant outlet by supercooling by heat exchange with outside air, Brackets are respectively provided on both side headers of the capacitor main body, and the supercooler is supported at both ends by these both brackets and is disposed on the front surface of the core part of the capacitor main body. It is assumed that was formed by.

In this condenser with a supercooler, the supercooler has a structure independent of the condenser body.
Since this subcooler is arranged on the front surface of the core portion of the condenser main body constituting the condenser, the front surface area due to the presence of the supercooler as in the conventional structure integrating the condenser and the subcooler described above is integrated. The required width of the installation space, up and down or left and right, is the same as that of a multi-flow condenser without a supercooler, and the supercooler is supported by brackets provided on both headers of the condenser body. The location of the supercooler on the front surface of the core portion of the capacitor body can be arbitrarily changed along the header direction depending on the mounting position of the bracket with respect to both headers. Therefore, for example, in the case of a car air conditioner, a subcooler can be arranged according to the state of the empty space on the front side of the core portion of the condenser main body installed in the engine room.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a condenser with a supercooler according to the present invention will be specifically described with reference to the drawings. 1 is a perspective view of the capacitor, FIG. 2 is a plan view of the same, and FIG. 3 is a principle diagram.

As shown in FIGS. 1 and 2, this condenser with a supercooler is provided with a multi-flow condenser body (1) and a condenser disposed in front of a core (10) of the condenser body (1). It comprises a cooler (2) and a receiver tank (3) arranged on the left side of the condenser body (1).

The condenser body (1) has a large number of flat tubes (4) extending along the horizontal direction as heat exchange conduits between a pair of left and right vertical headers (11) (12) facing each other. Are arranged at equal intervals to form a core portion (10), and the strip-shaped cover (5) between the flat tubes (4)... And the upper and lower edges of the core portion (10) and the flat tubes (10). 4), a corrugated fin (6) is arranged (the central part is omitted in FIG. 1). Each flat tube (4) communicates at both ends with the left and right headers (11) and (12), and has a refrigerant inlet (7a) at the upper part of the right header (12) and a lower part of the left header (11). Is connected to the receiver tank (3) via a pipe (8a).

A bracket (9) is attached to the outer peripheral portions of both side headers (11) and (12) of the capacitor body (1) so as to protrude forward.
The supercooler (2) is supported at both left and right ends by (9). This subcooler (2) is a single flat tube (21)
And upper and lower strip-shaped covers (5) and (5), and corrugated fins (6) and (6) disposed therebetween. The right end side of the flat tube (21) is connected to the refrigerant outlet (7).
b), and the left end is connected to the receiver tank (3) via a pipe (8b).

Each bracket (9) has a curved piece (9).
a) is fixedly bonded to the outer peripheral surfaces of the headers (11) and (12), and the end of the flat tube (21) is sandwiched between the forked protruding pieces (9a) extending from the curved piece (9a). In the state,
The bent ends of the upper and lower covers (5) and (5) are screwed or riveted to the projecting piece (9a).

As shown in FIG. 3, the capacitor body (1)
The inside of the right header (12) is vertically partitioned by a partition plate (13a), and the inside of the left header (11) is also vertically separated by a partition plate (13b) at a position lower than the partition position of the right header (11). Divided into the core (1
0) constitutes a condenser having a three-pass multi-flow structure. A pipe (8a) is provided in the receiver tank (3).
A blow-up pipe (31) communicating with the blow-up pipe (31) is arranged upright, the upper end of the blow-up pipe (31) is opened in the upper part in the tank, and the filtration unit (32) is arranged between the upper outer periphery of the blow-up pipe (31) and the tank inner circumference. , A pipe (8b) communicates with the bottom inside the tank. The filtration unit (32) has a desiccant loaded between the upper and lower filters.

The components of the condenser body (1) and the subcooler (2) are, for example, both headers (11) (1)
2) An aluminum brazing sheet which is formed by bending an aluminum brazing sheet into a cylindrical shape with both ends closed by a lid plate, an extruded aluminum material in flat tubes (4) and (21), and an aluminum brazing sheet in corrugated fins (6). A corrugated member, an aluminum alloy or the like for the bracket (9) is usually assembled temporarily in a required assembly state and brazed together in a furnace to be integrated.

In the condenser with a supercooler of the above embodiment, the high-temperature and high-pressure gas refrigerant fed from the compressor (not shown) is supplied to the refrigerant inlet (7) of the condenser body (1).
a), flows in a meandering manner through the core part (10) of the multi-flow structure, cools and condenses by heat exchange with the outside air, exits the condenser body (1) in a gas-liquid mixed state, and exits the pipe (8a). ) Flows into the receiver tank (3). And in this receiver tank (3), the blow-up pipe (31)
Released from the upper end, the uncondensed gas refrigerant accumulates at the top,
Only the liquid refrigerant accumulated in the lower part flows into the flat tube (21) of the supercooler (2) through the pipe (8b), is supercooled by heat exchange with the outside air, and is stabilized from the refrigerant outlet (7b). It flows out as a refrigerant and is guided to an evaporator (not shown). In the receiver tank (3), a surplus of the refrigerant in the circulation cycle is stored in such a manner that the gas-liquid ratio changes according to the load fluctuation.

In such a condenser with a supercooler,
Since the subcooler (2) has a configuration independent of the condenser body (1), and the subcooler (2) is arranged on the front surface of the core portion (10) of the condenser body (1), the condenser There is no increase in front area due to the presence of a supercooler such as a condenser with a conventional structure that integrates a supercooler with the supercooler, and the vertical width of the core (10) can be the same as a multi-flow capacitor without a supercooler. Therefore, the vertical space required for installation is reduced.

The supercooler (2) has a structure in which both ends are supported by brackets (9) and (9) provided on both headers (11) and (12) of the condenser body (1). 4) Depending on the mounting position of the brackets (9) and (9) with respect to (12), the arrangement position of the subcooler (2) is, for example, the intermediate height shown in FIG. 1, the upper part as shown in FIG.
It can be changed up and down like the lower part as in (B). It can be arbitrarily changed along the header direction on the front surface of the core portion of the capacitor body. Therefore, for example, in the case of a car air conditioner, the capacitor body (1) installed in the engine room
The arrangement position of the subcooler (2) can be set according to the state of the empty space on the front side of the core part (10), and it is possible to cope with the difference in the arrangement state of the peripheral devices due to the difference of the vehicle type.

In changing the arrangement position of the subcooler (2) as described above, all the same components can be used except for the pipes (8a) and (8b).
As for (8b), the same member can be used by adopting a material which is easy to bend.

In the above embodiment, the configuration in which both the headers (11) and (12) of the capacitor body (1) are in the vertical direction is exemplified. However, the configuration in which both the headers (11) and (12) are in the horizontal direction may be adopted. In the latter case, the arrangement position of the supercooler (2) can be changed in the left-right direction. Further, in the embodiment, the supercooler (2) has one heat exchange pipeline, but the number of heat exchange pipelines may be set to plural. In addition, in the condenser with a supercooler according to the present invention, the shape of the bracket (9) and the mounting structure to the headers (11) and (12), the connection structure between the bracket (9) and the end of the supercooler (2), The number of passes in the core section (10) of the condenser body (1), the number of heat exchange pipes in each pass, the positions of the refrigerant ports, the internal structure of the receiver tank (3), and other detailed configurations other than those in the embodiments are variously designed. Can be changed.

[0021]

According to the present invention, as a condenser with a supercooler having a function of sending condensed refrigerant to the evaporator side in a sufficiently supercooled state, a bracket provided on both side headers of a multi-flow condenser body is provided. Since the supercooler is arranged on the front surface of the condenser body, the front surface area of the core portion does not increase due to the presence of the supercooler, and the front surface area decreases accordingly. The installation space for the subcooler can be easily changed along the header direction according to the space condition of the installation part by the same components, and the installation space for the air conditioner can be easily changed. Suitable for mounting to a vehicle.

[Brief description of the drawings]

FIG. 1 is a perspective view of a condenser with a subcooler according to an embodiment of the present invention.

FIG. 2 is a plan view of the condenser with a subcooler.

FIG. 3 is a principle view of the condenser with a subcooler.

4A and 4B show a change of a mounting position of a supercooler in the condenser with a supercooler, wherein FIG. 4A is a schematic front view in a state where the mounting position is at an upper part, and FIG. It is a schematic front view of a state.

[Explanation of symbols]

 1 ···················································································································· ······································································ Refrigerant Outlet 8a, 8b ... Piping

Claims (1)

[Claims] 1. A plurality of heat exchange pipes, both ends of which are connected to both headers, are arranged in parallel between a pair of headers spaced apart from each other to form a core portion, and a refrigerant flowing from a refrigerant inlet is used for both heat exchange pipelines. A capacitor body that circulates in a meandering manner through the core portion by a partition in the header and exchanges heat with outside air;
A receiver tank that introduces the refrigerant after heat exchange by the condenser body, and a subcooler that has a heat exchange pipe that guides the liquid refrigerant derived from the receiver tank to the refrigerant outlet by supercooling by heat exchange with outside air. A capacitor with a subcooler, wherein brackets are provided on both side headers of the capacitor body, and the brackets are provided with the supercooler at both ends thereof and disposed on the front surface of a core portion of the capacitor body.