JPH0953866A - Condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condenser which is capable of expanding the car width dimension of a cooling core so as to enhance a cooling effect and enhancing a sub-cooling effect of liquid phase refrigerants. SOLUTION: A cooling pipe 5a in the lowermost stage out of a plurality of cooling pipes 5a to 5e provided in multistages of a condenser 1 is communicated with a lower side area of a liquid-receiving area 12 provided in a refrigerant outlet 14 of the other header pipe 2, thereby constituting a sub-cooling pipe 16. The liquid phase refrigerants stored in the liquid-receiving area 12 is arranged to be distributed in the sub-cooling pipe on the lowermost stage having a large open air conducting distribution, thereby enhancing the effect of sub- cooling so that the air may be introduced outside a condenser 1 by way of the sub-cooking pipe 16. This construction makes it possible to eliminate the need for a suction tube on the liquid-receiving area 12 and minimize the size of a header pipe 3 and expand the car width direction of a cooling core 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condenser used in a refrigerating cycle such as a vehicle air conditioner.

[0002]

2. Description of the Related Art As a condenser used in a refrigeration cycle of a vehicle air conditioner, one having a function of a liquid tank has been conventionally known.

This will be explained with reference to FIG. 2. The condenser 2
Reference numeral 1 denotes a pair of header pipes 22 and 23, and cooling pipes 25a to 25g with a plurality of fins 26 that form a cooling core 24 by communicating in a multi-step manner in the vertical direction across the header pipes 22 and 23. It has and.

The header pipe 22 is separated by a separator 27 into a refrigerant inflow chamber 28 in which cooling pipes 25a to 25c communicate with the lower side and a refrigerant return chamber 29 in which cooling pipes 25d to 25f communicate with the upper side.

The header pipe 23 is separated by a separator 30 into a refrigerant return chamber 31 having one side communicating with the cooling pipes 25a to 25e and a liquid receiving section 32 having another side communicating with the refrigerant pipe 25f.

A refrigerant outflow chamber 34 is further separated by a separator 33 above the liquid receiving portion 32, and the refrigerant outflow chamber 34 and the vicinity of the bottom of the liquid receiving portion 32 are connected by a suction pipe 35. ing.

The cooling pipe 25g at the uppermost stage is provided with the refrigerant outflow chamber 34 and the refrigerant return chamber 29 of the header pipe 22.
To communicate with the refrigerant outlet 37 provided on the upper side of the header pipe 22 so as to function as a subcool pipe 38 as described later.

In the conventional condenser 21, the high-pressure vapor-phase refrigerant flowing into the refrigerant inflow chamber 28 from the refrigerant inlet 36 provided in the lower side portion of the header pipe 22 is transferred to the refrigerant return chamber 3.
1, 29 to sequentially circulate from the cooling pipes 25a to 25c to the upper cooling pipes 25d to 25e and 25f, and the outside air and heat introduced into the cooling core 24 in the process in which the vapor phase refrigerant circulates in the cooling pipes 25a to 25f. By exchanging and cooling, the liquid is condensed and liquefied, and the high-pressure liquid-phase refrigerant is led out and stored in the liquid receiving section 32 from the cooling pipe 25f.

The high-pressure liquid-phase refrigerant stored in the liquid receiving section 32 is sucked up by the suction pipe 35 into the refrigerant outflow chamber 34,
The liquid-phase refrigerant is cooled again by this cooling pipe 25g in the process of being discharged to the refrigerant outlet 37 via the uppermost cooling pipe 25g, and the cooling pipe 25g functions as a subcool pipe 38.

As described above, according to the conventional condenser 21, the one header pipe 23 is provided with the liquid receiving portion 32 for storing the liquid phase refrigerant condensed and liquefied by cooling, and also has a function as a liquid tank. Therefore, the liquid tank is not required, the refrigeration cycle can be made compact, the number of joints of the refrigerant tubes can be reduced, the layout area can be expanded by reducing the occupied area in the engine room, liquid leakage can be prevented, and parts can be prevented. The cost can be reduced by reducing the number of points and the number of assembly work steps.

This similar structure is disclosed, for example, in Japanese Patent Laid-Open No. 3-875.
72, JP-A-4-43271, and JP-A-4-4371
It is disclosed in Japanese Patent Publication No. 131667.

[0012]

One of the header pipes 2
Since the suction pipe 35 for sucking the liquid-phase refrigerant of the liquid receiving section 32 into the refrigerant outflow chamber 34 is required in the inside 3, the header pipe 23 becomes large in diameter.

Therefore, while the condenser 21 is originally arranged in the front portion of the engine room in the front portion of the vehicle body, the dimension W of the vehicle in the vehicle width direction is restricted. It is undeniable that the dimension W ₁ of the vehicle in the vehicle width direction is narrowed and the cooling efficiency of the condenser 21 is reduced.

Further, the liquid-phase refrigerant stored in the liquid receiving section 32 is sucked up by the suction pipe 35, and the liquid-phase refrigerant is cooled again by the uppermost cooling pipe 25g, so that the uppermost cooling pipe 25g is cooled. Although it can function as the subcool pipe 38, as shown in FIG.
Considering the outside air guide distribution WA of the condenser 21 disposed in F, the air guide effect from the air spoilers A and S portions of the vehicle body front portion B and F is large, and the outside air guide air is provided in the upper portion of the condenser 21. Since the distribution WA tends to be small, even if the uppermost cooling pipe 25g functions as the subcool pipe 38 as described above, a high subcool effect cannot be expected.

Therefore, according to the present invention, the dimension of the cooling core in the vehicle width direction can be increased within the limited vehicle width direction dimension of the condenser to enhance the cooling efficiency of the condenser and enhance the subcool effect of the liquid phase refrigerant. The present invention provides a condenser that can be used.

[0016]

According to claim 1, there is provided 1
A plurality of cooling pipes are vertically connected in a multi-stage manner across a pair of header pipes, and a liquid receiving portion for storing a liquid phase refrigerant is formed in one header pipe, and a refrigerant inlet of the other header pipe. The gas-phase refrigerant taken in is circulated between the pair of header pipes to the upper side of the cooling pipe for cooling, and the liquid-phase refrigerant condensed and liquefied by the cooling is collected from above the one header pipe in the liquid receiving portion. In the condenser configured to store, the lowermost cooling pipe of the cooling pipes is connected to the lower side of the liquid receiving portion of one header pipe and the refrigerant outlet of the other header pipe to communicate with each other as a subcool pipe. It is characterized by being configured.

According to the first aspect of the present invention, the vapor phase refrigerant is circulated between the pair of header pipes to the upper stage of the cooling pipe to be cooled, condensed and liquefied and collected in the liquid receiving portion of one header pipe. The liquid-phase refrigerant to be stored is led out from the refrigerant outlet at the lower side portion of the other header pipe via the subcool pipe connected to the lower side portion of the liquid receiving portion.

Since the liquid-phase refrigerant stored in the liquid receiving portion can be led out of the condenser from the lower side portion of the liquid receiving portion through the subcool pipe constituted by the cooling pipe at the lowest stage, a suction pipe is provided in the liquid receiving portion. One of the header pipes forming the liquid receiving portion becomes unnecessary and the diameter of one of the header pipes can be reduced, and the dimension of the cooling core constituted by the cooling pipes in the vehicle width direction can be increased by that amount, thereby enhancing the cooling efficiency of the condenser You can

Further, since the high temperature refrigerant from the condenser introduction part is adjacent to the subcool part, the performance improvement by heat exchange and the region with a large wind speed distribution can be shared at the same time, so that the performance of the condensation part and the subcooling of the liquid phase part can be improved. The effect can be enhanced at the same time.

Since the suction pipe is not required in the liquid receiving portion of one of the header pipes, the number of parts and the number of assembling work steps can be reduced and the cost can be reduced.

According to a second aspect of the present invention, the refrigerant inlet and the refrigerant outlet of the other header pipe according to the first aspect are constituted by one collective connector in which the refrigerant inlet and the refrigerant outlet are joined to the lower portion of the other header pipe. It is characterized by that.

According to the second aspect of the invention, since the refrigerant inlet and the refrigerant outlet of the other header pipe are constituted by one collective connector, the other header pipe can be easily processed, and the parts can be easily processed. The number of points and the number of assembly work steps can be reduced, and the cost can be reduced.

Further, since the refrigerant tubes can be collectively connected to the collective connector, the workability of connecting the refrigerant tubes can be improved.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a pair of header pipes 2 and 3 and a plurality of fins 6 that form a cooling core 4 by connecting the header pipes 2 and 3 in a multi-stage communication in the vertical direction. And cooling pipes 5a to 5g.

The header pipe 2 is connected to the cooling pipes 5b and 5c on the lower side by a separator 7, and a refrigerant inflow chamber 8 into which a high-pressure gas-phase refrigerant compressed by a compressor not shown is introduced.
And a refrigerant return chamber 9 communicating with the cooling pipes 5d to 5g on the upper side.

On the other hand, the header pipe 3 is divided by a separator 10 into a refrigerant return chamber 11 having one side communicating with the cooling pipes 5b to 5e and a liquid receiving portion 12 having another side communicating with the cooling pipes 5f and 5g. is there.

Between these header pipes 2 and 3, the high pressure vapor phase refrigerant flowing into the refrigerant inflow chamber 8 is transferred to the header pipes 2 and 3.
Cooling pipe 5 by refrigerant return chambers 9 and 11 between 3
b, 5c to upper cooling pipes 5d, 5e and 5
f and 5g in sequence, and the high-pressure gas-phase refrigerant exchanges heat with the outside air introduced to the cooling core 4 in the process of circulating these cooling pipes 5b to 5g, and the high-pressure liquid phase condensed and liquefied by cooling. The refrigerant is collected and stored in the liquid receiving section 12 through the cooling pipes 5f and 5g.

A refrigerant inlet 13 and a refrigerant outlet 14 are provided on the lower side of the header pipe 2, and in the present embodiment, the refrigerant inlet 13 and the refrigerant outlet 14 are connected to the lower side of the header pipe 2. One collective connector 15 that is joined and arranged in the section
The high-pressure gas-phase refrigerant compressed by the compressor described above is introduced from the refrigerant inlet 13 into the refrigerant inflow chamber 8, and the high-pressure liquid-phase refrigerant stored in the liquid receiving section 12 is discharged from the refrigerant outlet 14 to the outside of the drawing. It is designed to be led to the indoor air conditioning unit.

Here, among the cooling pipes 5a to 5g, the cooling pipe 5a at the lowermost stage straddles the lower side of the liquid receiving portion 12 of the header pipe 3 and the inside of the refrigerant inflow chamber 8 of the header pipe 2. The subcool pipe 16 is connected to the outlet 14 and cools the high-pressure liquid-phase refrigerant flowing from the liquid receiving portion 12 to the refrigerant outlet 14.

According to the structure of the above embodiment, when the high-pressure vapor-phase refrigerant compressed by the compressor (not shown) is introduced into the refrigerant inflow chamber 8 from the refrigerant inlet 13 of the header pipe 2, The vapor-phase refrigerant flows through the cooling pipes 5b and 5c into the cooling pipes 5d and 5e in the upper stage through the refrigerant return chamber 11 of the header pipe 3 and passes through these cooling pipes 5d and 5e to the refrigerant return chamber 9 of the header pipe 2. Further, they will be distributed to the cooling pipes 5f and 5g in the upper stage.

As described above, the high-pressure gas-phase refrigerant is circulated between the pair of header pipes 2 and 3 from the cooling pipes 5b and 5c through the upper cooling pipes 5d, 5e and 5f and 5g in sequence, thereby In the process of circulating the cooling pipes 5b to 5g, it is cooled by the outside air introduced into the cooling core 4 and condensed and liquefied.

The condensed and liquefied high-pressure liquid-phase refrigerant is collected and stored in the liquid receiving portion 12 of the header pipe 3 through the cooling pipes 5f and 5g.

Then, the high-pressure liquid-phase refrigerant stored in the liquid receiving section 12 passes through the subcool pipe 16 below the liquid receiving section 12 toward the refrigerant outlet 14 of the header pipe 3, and again in the subcool pipe 16. It is cooled and led out from the refrigerant outlet 14 to an indoor air conditioning unit (not shown).

As described above, the high-pressure liquid-phase refrigerant stored in the liquid receiving section 12 is led out of the condenser 1 from the lower side of the liquid receiving section 12 through the subcool pipe 16 constituted by the cooling pipe 5a at the lowermost stage. Therefore, the liquid receiving part 12 does not require a suction pipe as in the conventional case, and the diameter of the header pipe 3 in which the liquid receiving part 12 is formed can be reduced.

As a result, since the condenser 1 is arranged in the front portion of the engine room at the front portion of the vehicle body, the dimension W in the vehicle width direction is obtained.
However, by reducing the diameter of the header pipe 3, the dimension of the cooling core 4 in the vehicle width direction can be expanded as indicated by W ₂ , and the cooling efficiency of the condenser 1 can be improved.

Further, the subcool pipe 16 is connected to the lower side of the condenser 1 having a large outside air guide distribution W · A (see FIG. 3), that is,
Since the cooling pipe 5a in the lowermost stage is used, the subcool effect of the high-pressure liquid-phase refrigerant can be enhanced.

Further, in the present embodiment, since the refrigerant inlet 13 and the refrigerant outlet 14 of the header pipe 2 are constituted by one collective connector 15 which is arranged below the header pipe 2 so as to be joined, the header pipe 2 is processed. In addition to being easily performed, the liquid receiving portion 12 of the header pipe 3 does not need a suction pipe as described above, and at the same time, the number of parts and the number of assembling work can be reduced, and the cost can be reduced.

Further, since the refrigerant tubes (not shown) can be collectively connected to the collective connector 15, the workability of connecting the refrigerant tubes can be improved.

[0040]

As described above, according to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, the liquid-phase refrigerant stored in the liquid receiving portion of one of the header pipes is passed from the condenser to the lower side of the liquid receiving portion through the sub-cool pipe constituted by the cooling pipe at the lowermost stage, and then from the condenser. Since it can be led out, a suction pipe is not required in the liquid receiving part, and the diameter of the one header pipe can be reduced, and the dimension of the cooling core configured by the cooling pipe in the vehicle width direction can be increased accordingly. The cooling efficiency of the condenser can be increased, and the cooling performance of the air conditioner can be improved.

Further, since the subcool pipe is arranged below the condenser having a large distribution of the outside air flow, the subcool effect of the liquid phase refrigerant led out from the liquid receiving portion can be enhanced and the cooling performance of the air conditioner can be improved. It can be further improved.

Further, since the liquid receiving portion of the one header pipe does not require a suction pipe for leading out the liquid phase refrigerant, the structure of the header pipe is simplified and the number of parts and the number of assembling steps are reduced. It is possible to reduce the cost and reduce the cost.

According to the second aspect, since the refrigerant inlet and the refrigerant outlet of the other header pipe are constituted by one collective connector, the other header pipe can be easily processed and the number of parts and the number of parts can be set. The number of man-hours required for attachment can be reduced and the cost can be reduced.

Further, since the refrigerant tubes can be collectively connected to the collective connector, the workability of connecting the refrigerant tubes can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a conventional structure.

FIG. 3 is an explanatory view showing a wind guide distribution of a condenser mounted on a front portion of a vehicle body.

[Explanation of symbols]

 1 Condenser 2 Other header pipe 3 One header pipe 4 Cooling core 5a-5g Cooling pipe 12 Liquid receiving part 13 Refrigerant inlet 14 Refrigerant outlet 15 Collective connector 16 Subcool pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mamoru Saito 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Co., Ltd. (72) Inventor Naoji Shibuya 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd.

Claims (2)

[Claims] 1. A plurality of cooling pipes are connected and communicated in a vertical manner in a multi-stage manner across a pair of header pipes,
A liquid receiving portion for storing a liquid-phase refrigerant is formed in one header pipe, and a gas-phase refrigerant taken from the refrigerant inlet of the other header pipe is circulated between the pair of header pipes to the upper stage side of the cooling pipe for cooling. Then, in the condenser configured to collect and store the liquid-phase refrigerant condensed and liquefied by cooling from the upper side of one of the header pipes in the liquid receiving portion, the cooling pipe in the lowermost stage of the cooling pipes is connected to one of the header pipes. A condenser characterized in that it is configured as a subcool pipe by being connected to the lower side of the liquid receiving section and the refrigerant outlet of the other header pipe. 2. A condenser characterized in that the refrigerant inlet and the refrigerant outlet of the other header pipe are constituted by one collective connector which is arranged to be joined to the lower side portion of the other header pipe.