JP2006266570A - Vehicular cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular cooling device capable of independently arranging a condensing part and a supercooling part, capable of achieving flexible layout in accordance with a vehicle body frame, capable of making a refrigerant smoothly pass by arranging straight pipes between the condensing part and a receiver and between the receiver and the supercooling part as connecting pipes, and capable of reducing the pressure loss, and thereby capable of improving cooling performance. <P>SOLUTION: This device is provided with the condensing part 1 for exchanging the heat of the refrigerant gas, the receiver 2 having a refrigerant flow-in port 14 and a refrigerant flow-out port 15 on an end and introducing the refrigerant flowing out of the condensing part 1 through the refrigerant flow-in port and making only liquid refrigerant flow out of the refrigerant flow-out port, and the supercooling part 3 having a core independent from a core of the condensing part 1 and further cooling the liquid refrigerant from the receiver 2. The condensing part 1 and the receiver 2 are connected by the straight connecting pipe 4, and the receiver 2 and the supercooling part 3 are connected by the straight connecting pipe 5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicular cooling device employed in a cooling device for a car air conditioner.

Generally, a cooling device in an air conditioner for a passenger car includes an evaporator, a compressor, a condenser, a liquid receiver, and an expansion valve, and a refrigerant is circulated through them. The compressor is driven by the rotational force of the engine, and thereby compresses and sends out the refrigerant to operate the refrigeration cycle.
In the evaporator, the heat of the air sent into the vehicle interior can be absorbed by the action of the refrigerant absorbing external heat, and thus the vehicle interior is cooled.

In a vehicle equipped with such a cooling device, particularly in a large vehicle having a large vehicle compartment volume, the refrigerant is given a supercooling degree as follows in order to improve the efficiency of the refrigeration cycle. .
A supercooling section is provided in the refrigerant passage from the receiver to the expansion valve, and the saturated liquid refrigerant flowing out from the receiver is cooled to near the outside air temperature by the supercooling section so as to have a degree of supercooling. By setting it as such a structure, since the refrigerant | coolant of the state in which the degree of supercooling was raised can be sent to the evaporator side, a cooling operation can be performed efficiently.
A technique described in Japanese Patent Application Laid-Open No. 2000-314574 is known as a technique related to such a vehicular cooling device.
JP 2000-314574 A

However, in recent vehicle cooling devices, the condensing unit and the supercooling unit are integrally formed by modularizing components. For this reason, there is a problem in that the mounting position of the receiver is limited, and the connection piping with the receiver is bent in a complicated manner.
Especially for large vehicles, to increase the cooling capacity, it is desirable to increase the area of the condensing part, but due to restrictions on the distance between the side members, the radiator core support to ensure vehicle rigidity approximately in the vicinity of the center of the radiator core support Lower etc. are set. For this reason, the arrangement | positioning of a receiver becomes far from a condensation part, and the piping layout between a receiver and supercooling is complicated.
As described above, since the piping is complicated, the connecting pipe with the receiver is bent, and a resistance is generated when the refrigerant flows, so that there is a problem that the cooling efficiency is lowered.
Also, in the case of a so-called serpentine capacitor, the condensing part and the supercooling part do not have a part corresponding to the header, and the part that communicates the receiver and the supercooling part is a tube constituting the core, so the mounting structure is complicated. There was a problem of becoming.

  The present invention has been made to solve such conventional problems, and its object is to provide a condensing part and a supercooling part independently, enabling a flexible layout according to the body frame. Furthermore, the present invention provides a vehicular cooling device that improves cooling efficiency by smoothly passing a refrigerant through a connecting pipe between a condenser and a receiver, and a receiver and a supercooling section, and reducing pressure loss. It is in.

  In the vehicular cooling device according to claim 1 of the present invention, a plurality of heat exchange tubes that are connected in communication with both headers at both ends are arranged in parallel between a pair of vertically arranged headers to form a core, The refrigerant flowing in from the inlet provided at the upper part of the header flows through the plurality of heat exchange tubes and flows out from the outlet provided at the lower part of the header, and the refrigerant inlet and the refrigerant outlet at the end. A receiver that is provided and introduces the refrigerant that has flowed out of the condensing unit from the refrigerant inflow port, and causes only the liquid refrigerant to flow out of the refrigerant outflow port, and a core that is independent of the core of the condensing unit, A supercooling section for further cooling the liquid refrigerant, the condensing section and the receiver are connected by a straight connection pipe, and the receiver and the supercooling section are connected by a straight connection pipe. .

In the first aspect of the present invention, between the pair of vertically arranged headers, a plurality of heat exchange tubes that are connected in communication with both headers at both ends are arranged in parallel to form a core, The refrigerant flowing in from the inlet provided at the upper part of the header flows through the plurality of heat exchange tubes and flows out from the outlet provided at the lower part of the header, and the refrigerant inlet and the refrigerant outlet at the end. A receiver that is provided and introduces the refrigerant that has flowed out of the condensing unit from the refrigerant inflow port, and that causes only the liquid refrigerant to flow out of the refrigerant outflow port, and a core that is independent of the core of the condensing unit, A supercooling unit that further cools the liquid refrigerant, the condensing unit and the receiver are connected by a straight connection pipe, and the receiver and the supercooling unit are connected by a straight connection pipe. Refrigerant flow There is carried out through a straight pipe. Therefore, the flow resistance that does not pass through the bent pipe is reduced, and the cooling efficiency is improved.
Moreover, since the condenser core and the supercooling core are separated, the mounting space on the vehicle can be set flexibly, and various layouts are possible.

  In the invention according to claim 2, the receiver is disposed along the side of the vertical header of the condenser core, the header of the supercooling core is positioned immediately below the receiver, and the vertical header of the condenser core The receiver is connected by a horizontal connecting pipe, and the connecting pipe is extended from the lower surface of the receiver in the vertical direction and connected to the header of the supercooling unit, so that the connection is made smoothly, and the condensing unit, the receiver, the receiver, and the supercooling unit are connected. It is possible to connect reliably in the shortest distance.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic front view of the vehicular cooling apparatus according to the first embodiment.
First, an overall configuration of one embodiment of the present invention will be described.
As shown in FIG. 1, the vehicle cooling device of the present invention includes a condensing unit 1 that condenses the refrigerant discharged from the compressor, and a receiver that separates the gas-liquid of the refrigerant condensed in the condensing unit 1 and stores the liquid refrigerant. 2 and a supercooling unit 3 that supercools the liquid refrigerant from the receiver 2, and the condensing unit 1 and the receiver 2, and the receiver 2 and the supercooling unit 3 are connected by straight connection pipes 4 and 5. Is.

The condensing unit 1 is a heat exchanger for cooling the high-temperature and high-pressure refrigerant gas sent from the compressor to condense and liquefy it.
The condensing unit 1 has a refrigerant inflow side header 6 and a refrigerant outflow side header 7 arranged at a predetermined interval. The headers 6 and 7 form a cylindrical tank extending in the vertical direction. A heat exchange core is formed between 7.
Between the left and right headers 6 and 7, a large number of tubes 8 for flowing a refrigerant in the horizontal direction are arranged in parallel, and the tubes 8 communicate between the left and right headers. And the corrugated fin 9 is joined between these many piping.

  A refrigerant inlet side connector 10 is arranged on the side of the refrigerant inflow side header 7 on the upper end side, and is connected to a pipe from the compressor. The refrigerant is sent from the inlet side connector 10.

In addition, separators 11 are arranged in the headers 6 and 7 and partitioned into a plurality of spaces in the vertical direction. By arranging the separator 11, the refrigerant gas sent from the inlet flows into the space partitioned by the first separator, flows through the tube connected to the space, and moves to the header 7 on the opposite side. . In the header 7, the refrigerant gas stays in the space partitioned by the separator, flows from the space through the tube, and returns to the header 6. In other words, by being partitioned by the separator, the refrigerant gas meanders and flows in an S-shape while moving between the headers 6 and 7.
The refrigerant gas cooled while passing through the tube 8 is finally guided to the receiver 2 from the lower end of the header 7.

  The supercooling part 3 is arrange | positioned independently of the condensation part, and forms the core whose vertical width is smaller than a condensation part. And the structure has the refrigerant | coolant inflow side header 12 and the refrigerant | coolant outflow side header 13 which are arrange | positioned at predetermined intervals, and the tube 8 which flows a refrigerant | coolant in a horizontal direction is parallel between the left-and-right headers 12 and 13. Many tubes are arranged, and this tube communicates between the left and right headers. And the corrugated fin 9 is joined between these many piping.

The receiver 2 sends out only the refrigerant liquefied by gas-liquid separation of the refrigerant flowing from the condenser 1 to the supercooling unit 3. A refrigerant inlet 14 is provided on the side of the tank body, and the bottom surface of the tank body Is provided with a refrigerant outlet 15.
The receiver 2 is arranged along the side of the vertical header 7 of the condensing unit 1 core, and the lower end of the header 7 and the refrigerant inlet 14 are connected by a straight horizontal connecting pipe 4. And the header 12 of the subcooling part core is located directly under the receiver 2, and the upper end part of the header 12 and the coolant outlet 15 are connected by the straight vertical connection pipe 5.

Next, the operation of the present invention will be described.
In a refrigeration cycle of a vehicle, when a compressor is operated, a refrigerant in a gaseous state is sucked from an evaporator and compressed to be output as a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant discharged from the discharge port of the compressor flows out to the condensing unit 1.
The high-temperature and high-pressure refrigerant gas introduced from the condenser connector 10 flows in a meandering manner through the condenser 1, and is cooled and condensed by heat exchange with the outside air during the flow, and becomes a refrigerant for gas-liquid mixing. And flows out from the outlet of the condenser. Then, the gas-liquid mixed refrigerant is introduced into the receiver 2 from the refrigerant inlet 14 via the connecting pipe 4. The gas-liquid mixed refrigerant introduced into the receiver 2 in this way is made liquid, and only the liquid refrigerant is guided from the refrigerant outlet 15 to the supercooling unit 3 through the vertical pipe 5.

Here, since the condensing part 1 and the receiver 2 are connected by the straight connection pipe | tube 4, a refrigerant | coolant passes smoothly through this straight pipe | tube. That is, the bent connecting pipe increases the flow resistance of the refrigerant gas, and it is necessary to ensure a high compressor output. However, in the present invention, since this is a straight pipe, the refrigerant gas passes smoothly. Therefore, pressure loss is reduced and cooling efficiency is improved.
Similarly, since the receiver 2 and the supercooling unit 3 are connected by the straight connection pipe 5, the refrigerant gas passes smoothly, the pressure loss is reduced, and the cooling efficiency is improved.

  Next, the liquid refrigerant guided to the supercooling unit 3 is supercooled to a temperature several degrees lower than the condensing temperature by heat exchange with the outside air while passing through the tube 8, and becomes a stable state. It flows out from the connector 16 and is sent out to an expansion valve and an evaporator.

Next, the effect will be described.
As described above, in the present embodiment, since the supercooling unit 3 forms a core independent of the core of the condensing unit 1, the mounting space on the vehicle can be set flexibly and various layouts are possible. Become.
In addition, since the condensing unit 1 and the receiver 2 are connected by the straight connection pipe 4, and the receiver 2 and the supercooling part 3 are connected by the straight connection pipe 5, the pressure loss when the refrigerant passes is reduced. As a result, the cooling efficiency is improved.
Further, the receiver 2 is arranged along the side of the vertical header 7 of the condenser core, the header 12 of the supercooling core is positioned directly below the receiver 2, and the vertical header 7 of the condenser core and the receiver 2 are placed horizontally. The connecting pipe 4 is extended from the lower surface of the receiver 2 in the vertical direction and connected to the header 12 of the supercooling unit, so that the connection is made smoothly, and the condensing unit 1, the receiver 2, and the receiver 2 The supercooling unit 3 can be reliably connected at the shortest distance.

Although the present embodiment has been described above, the present invention is not limited to the above-described embodiment, and design changes and the like within the scope not departing from the gist of the present invention are included in the present invention.
For example, in the above embodiment, the receiver 2, the condensing unit 1 and the supercooling unit 3 are connected by extending the connecting pipe in the horizontal and vertical directions. However, in the case where the connecting pipes 4 and 5 are extended in the oblique direction. Even if it exists, it is included in this invention.

It is a schematic front view of the cooling device for vehicles concerning one example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Condensing part 2 Receiver 3 Supercooling part 4 Connecting pipe 5 Connecting pipe 6 Header 7 Header 8 Tube 9 Fin 10 Connector 11 Separator 12 Header 13 Header 14 Refrigerant inlet 15 Refrigerant outlet 16 Connector

Claims (2)

Between a pair of vertically arranged headers, a plurality of heat exchange tubes communicating both ends with both headers are arranged in parallel to form a core, and the refrigerant flowing in from the inlet provided at the top of the header, A condensing part that flows through the plurality of heat exchange tubes and flows out from an outlet provided in a lower part of the header;
A refrigerant inlet and a refrigerant outlet are provided at the ends, a receiver that introduces the refrigerant that has flowed out of the condensing unit from the refrigerant inlet, and causes only the liquid refrigerant to flow out of the refrigerant outlet, and
Forming a core independent of the core of the condensing unit, and a supercooling unit for further cooling the liquid refrigerant from the receiver,
The vehicle cooling device, wherein the condensing unit and the receiver are connected by a straight connecting pipe, and the receiver and the supercooling unit are connected by a straight connecting pipe. Place the receiver along the side of the vertical header of the condenser core,
Position the header of the supercooling core directly under the receiver,
2. The vehicle cooling according to claim 1, wherein the vertical header of the condenser core and the receiver are connected by a horizontal connecting pipe, and the connecting pipe is extended from the lower surface of the receiver in the vertical direction and connected to the header of the supercooling section. apparatus.

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