JPH04174296A - Condenser - Google Patents

Abstract

PURPOSE:To permit the separation of gas from liquid without increasing the number of constituting parts by introducing liquid phase refrigerant, reserved in a chamber above a second partitioning plate, into another chamber above a first partitioning plate through at least one piece of tube among a multitude of pieces of tubes. CONSTITUTION:Refrigerant, entered the chamber 10 of a right side header 1 from a refrigerant inlet pipe 4, flows through tubes 8a, 8b in the directions shown by arrows in a diagram to enter the chamber 13 of a left side header 2 and, subsequently, flows through the tubes 8e, 8f into the directions shown by arrows in the diagram to enter the chamber 11 of the right side header 1. Liquid phase refrigerant in the refrigerant entered the chamber 11 is reserved on a first separator 12 as liquid reservation. The liquid phase refrigerant, reserved in the chamber 11, flows through the tubes 8c, 8d and enters freely a left side chamber 14. Accordingly, the liquid phase refrigerant, reserved in the chamber 11, flows into the chamber 14 of the left side header 2 through tubes 8c, 8d, which bypass a tube 8g. Gas phase refrigerant in the chamber 11 flows through the tube 8g in arrow directions and is deprived of heat thereof whereby it becomes liquid phase refrigerant and flows into the chamber 14 of the left side header 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a condenser used in a refrigeration cycle device, and particularly to a structure of a condenser for separating refrigerant into gas and liquid.

(Prior art) As a conventional condenser used in refrigeration equipment,
Horizontal flow type devices disclosed in Japanese Patent Application Laid-Open No. 191894-191894 and Japanese Unexamined Patent Publication No. 191895-1989 are known.

This type of horizontal flow type condenser, in which refrigerant flows horizontally, is equipped with a partition plate that separates the upper and lower chambers in the longitudinal direction of the header installed on both sides of the core, and a hole in this partition plate that connects the upper and lower chambers. is formed.

(Problem to be Solved by the Invention) However, in the horizontal flow type condenser disclosed in the above-mentioned JP-A-59-191894 and JP-A-59-191895, the refrigerant flows into the tube from the inlet pipe. When refrigerant is discharged from a low-level refrigerant outlet pipe by flowing downstream from the top, the liquid refrigerant that has accumulated at the top of the partition plate may flow into the tubes, or the refrigerant liquid level may only submerge in some tubes, resulting in poor distribution. Or, when the liquid refrigerant immersed in the holes falls to a low position, the vapor phase refrigerant also flows through the holes, resulting in a problem that heat dissipation performance is significantly reduced.

Furthermore, the horizontal flow type condenser cannot flow the refrigerant from below upstream from the refrigerant inlet pipe to the refrigerant outlet pipe located at a high position. When flowing upstream from the bottom, it is necessary to provide bypass piping to supply liquid refrigerant from the partition plate section, which makes the structure complicated.

The present invention was made to solve these problems, and is a horizontal flow type condenser that flows from the bottom upstream, and is capable of separating gas and liquid without requiring bypass piping or increasing the number of components. The purpose of this invention is to provide a condenser with good heat exchange efficiency.

(Means for Solving the Problems) For this purpose, the condenser of the present invention includes a first header having a refrigerant outlet pipe at the upper part, a second header provided on the left and right opposite side of the first header, and a second header provided on the left and right opposite sides of the first header. A first partition plate that partitions the inside of the header into upper and lower chambers, a second partition plate that partitions the inside of the second header into upper and lower chambers, both ends of which are inserted into the first header and the second header, and are arranged in parallel. fins arranged in air gaps between the adjacent tubes to exchange heat with the refrigerant flowing in the tubes, and introduced into a lower chamber inside the first header or the second header. The condenser is configured to flow a vapor-phase refrigerant into the tubes, and discharge the liquid-phase refrigerant, which has been liquefied by removing heat, from an upper chamber inside the first header, the condenser having at least one tube out of the plurality of tubes. The tube is characterized in that the liquid phase refrigerant stored in the chamber above the second partition plate is introduced into the chamber above the first partition plate.

(Function) According to the condenser of the present invention, the gas phase refrigerant introduced from the refrigerant inlet pipe passes through the tube, removes heat, becomes liquid phase refrigerant, and is discharged from the upper refrigerant outlet pipe. in this case,
The liquid phase refrigerant accumulated in the chamber above the second partition plate inside the second header without the refrigerant outlet pipe passes through the tube to the chamber above the first partition plate inside the first header where the refrigerant outlet pipe is located on the opposite side. and is discharged from the refrigerant outlet pipe.

(Example) Embodiments of the present invention will be described below based on the drawings.

1 to 3 show a first embodiment of a condenser used in an automobile air conditioner.

A core portion 3 is configured between the right side header 1 and the left side ladder 2. A refrigerant inlet pipe 4 is formed on the bottom surface of the ladder 1 to the right, and a refrigerant outlet pipe 5 is formed on the top surface of the ladder 2 to the left. The reason why the refrigerant inlet pipe 4 is provided below the position of the refrigerant outlet pipe 5 is that experiments have shown that when the refrigerant flows upstream from the bottom, the heat dissipation performance is generally higher than when it flows downstream from the top. This is because it is clear. According to experiments, as shown in Figure 6, the effect of the flow direction of the refrigerant on heat dissipation performance is that in the case of a horizontal flow type, the faster the wind speed flowing between the fins, the higher the heat dissipation performance. Heat dissipation is better in the case of flowing from the bottom upstream than in the case of flowing downstream.

In the core part 3, a large number of flat tubes 8a to 8g are arranged in parallel in the horizontal direction, and one end of each tube 8a to 8g communicates with the ladder 1 to the right, and the other end communicates with the ladder 2 to the left. ing. A corrugated fin 9 is arranged between the adjacent tubes 88 to 8g, extending from the right header side surface 1a to the left header side surface 2a.

Inside the right header 1, there are a lower chamber 10 and an upper chamber 11.
A first separator 12 is provided at a vertical position between the two tubes 8b from the bottom and the third tube 8C from the bottom. The first separator 12 includes a left chamber 13,
It has a gas-liquid separation function to store the liquid phase refrigerant flowing into the right chamber 11 from the tubes 8e and 8f.

To the left, the interior of the ladder 2 is partitioned into a lower chamber 13 and an upper chamber 14 by a second separator 15.

As shown in FIG. 2 and FIG.
It is composed of a plate 17 having a U-shaped cross section that is joined to the header body 16 and an end cap 18 that fixes the header body 16 and the plate 17 at their lower ends. A second separator 15 is attached to partition the chamber 13 and chamber 14 shown in FIG. 1, which are surrounded by the header body 16 and plate 17.

The second separator 15 has an overall shape of S when viewed from the side.
It has a U-shaped lower plate 15a, a middle plate 15b bent almost vertically from the lower plate 15a, and an upper plate 15c bent horizontally at its upper end. End 1 of lower plate 15a
5e is liquid-tightly joined to the inner circumferential wall 16c of the header body 16, and an oval insertion hole 20.21 for inserting the tube 8C18d is formed in the middle plate 15b. The end portion 15d of the upper plate 15c is liquid-tightly joined to the plate 17 so as to partition the chamber 13 and the chamber 14 at a vertical position between the tubes 8f and 8g.

During assembly, the holes 17c in the plate 17, as shown in FIG.
Insert the end of the tube 8C18d inserted into the tube 17d into the insertion hole 20.21 of the second separator 15, and
The header body 16 is fitted to the plate 17 and the end cap 18 is fitted to the plate 17 and the header body 16. in this case,
Since the tube 8C18d is positioned in the insertion hole 20.21, a special mechanism for locking the second separator 15 is not required, so that the second separator 15 can be easily assembled.

Next, the flow of refrigerant will be explained. In FIG. 1, the refrigerant flowing from the refrigerant inlet pipe 4 to the right side into the chamber 10 of the ladder L flows in the direction of the arrow in the tubes 8a and 8b, enters the chamber 13 in the left header 2, and then flows through the tubes 8e and 8f in the direction of the arrow. and flows into the chamber 11 of the ladder 1 to the right. Room 11
Of the refrigerant that has flowed into the first separator 12, the liquid phase refrigerant is collected as a liquid pool on the first separator 12. The liquid phase refrigerant stored in the chamber 11 flows through the tube 8C18d and flows into the left chamber 14.
Flow freely. Therefore, the liquid phase refrigerant stored in the chamber 11 is transferred to the tube 8C18 which bypasses the tube 8g.
d flows into the chamber 14 of the ladder 2 to the left. room ll
The gas phase refrigerant inside flows in the direction of the arrow through the tube 8g, is stripped of heat, and flows into the chamber 14 of the left header 2 as a liquid phase refrigerant.

Therefore, gas-liquid separation within the condenser can be ensured. Additionally, bypass piping to flow the liquid refrigerant stored in the header on the side without the refrigerant outlet pipe to the refrigerant outlet pipe is no longer required, which simplifies the assembly of the condenser due to its structure, saving space and lowering costs. can be achieved. Furthermore, if the refrigerant in the tubes 8c and 8d is a gas-liquid mixed phase refrigerant, this refrigerant is cooled and liquefied by heat exchange with the fins 9, thereby improving distribution.

FIG. 4 shows a second separator 30 as a first partition plate according to a second embodiment of the present invention.

The lower plate 30a, middle plate 30b, and upper plate 30c correspond to the lower plate 15a, middle plate 15b, and upper plate 15c shown in FIG.

Annular convex portions 31a and 32a protruding toward the plate 17 are formed around insertion holes 31.32 opened in the middle plate 30b. The tube 8C18 is attached to the annular convex portions 31a and 32a.
d is inserted and fixed, the length of the tube 8C18d can be made equal to the length of the other tubes 8a, 8b, 8e, 8f, and 8g. As a result, tubes 8a~
Since the length of 8g can be made the same, cost reduction can be achieved.

FIG. 5 shows a condenser according to a third embodiment of the invention.

The third embodiment is an example in which a refrigerant inlet pipe 34 and a refrigerant outlet pipe 35 are formed on the ladder l to the right. To the right side, insert the inside of the ladder 1 into the first separator 39 and the second separator 40.
It is divided into three chambers 36, 37, and 38. The left header 2 is partitioned into chambers 43 and 44 by a third separator 42. The second separator 40 has substantially the same shape as the second separator 15 shown in FIG.

In the third embodiment, the number of tubes 48a to 48i from the refrigerant inlet pipe 14 to the refrigerant outlet pipe 35 is greater than that in the first embodiment. The refrigerant flowing from the refrigerant artificial pipe 34 into the chamber 36 and tubes 48a and 48b in the direction of the arrows flows into the chamber 43 and tubes 48c and 48d.
, chamber 37, tubes 48g and 48h, chamber 44, tube 48i, and chamber 38 to reach the refrigerant outlet pipe 35. room 4
The liquid phase refrigerant stored in the chamber 4 flows into the chamber 38 through tubes 48e and 48f. Since the refrigerant flow path is longer than that of the first embodiment, there is an advantage that the heat dissipation performance is improved compared to the first embodiment. In FIG. 5, components that are substantially the same as those in FIG. 1 are given the same reference numerals.

Next, FIG. 7 shows a comparative example to be compared with the example of the present invention. In this comparative example, the refrigerant flowing into the chamber 63 from the refrigerant inlet pipe 4 flows through the tube 58a.

58b, 58c, chamber 66, tubes 58d, 58e, and chamber 60. The liquid phase refrigerant that has flowed into the chamber 60 is guided to the refrigerant outlet pipe 5 by an external bypass pipe 68. The gas phase refrigerant in the chamber 60 is guided from the chamber 67 to the refrigerant outlet pipe 5 through the tubes 58f and 58g. In this comparative example, since the structure is such that a bypass piping 68 is added, the self-tube structure is complicated and the work of installing the piping is complicated.
This method has the disadvantages of high cost, requiring a large space, and limiting the layout of the condenser when mounted on a vehicle.

In contrast, the first, second, and third embodiments do not require bypass piping, and have excellent advantages such as easy assembly, low cost, space saving, and improved thermal efficiency. Moreover, the embodiment of the present invention uses a horizontal flow type in which the refrigerant flows from the bottom upstream, as shown in FIG. It can be said that it is excellent in terms of both function and structure.

(Effects of the Invention) As explained above, according to the condenser of the present invention, the condenser is of a horizontal flow type in which the refrigerant flows horizontally from the bottom upstream, and the first partition plate is provided in the first header on the refrigerant outlet pipe side. By changing the shape, some of the tubes connecting the first header and the second header are used to concentrate the liquid phase refrigerant in the first header on the refrigerant outlet pipe side. Ensure that the refrigerant is discharged from the refrigerant outlet pipe.
This has the effect of providing a gas-liquid separation function without the need for special bypass piping.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing a condenser according to a first embodiment of the present invention, FIG. 2 is an assembled and exploded configuration diagram showing the main parts thereof, and FIG.
The figure is a schematic perspective view showing the first partition plate portion according to the first embodiment of the present invention, and FIG.
Showing the partition plate, (a) is a perspective view, (b) is (a)
Figure 6 is a characteristic diagram showing the relationship between the air volume flowing through the condenser and the heat dissipation performance, and Figure 7 is a diagram of the conventional FIG. 2 is a schematic configuration diagram showing a comparative example. 1... Header (second header), 2... Header (first ladder), 4... Refrigerant artificial pipe, 5... Refrigerant outlet pipe, 8 (88 to 8 g)... Tube, 9...fin, 10.11.13.14...chamber, 12...first separator (second partition plate), 15.
...Second separation plate (first partition plate).

Claims (1)

[Claims] (1) a first header having a refrigerant outlet pipe at the top;
a second header provided on the left-right opposite side of the first header; a first partition plate that partitions the inside of the first header into upper and lower chambers; a second partition plate that partitions the inside of the second header into upper and lower chambers; A large number of tubes having both ends inserted into the first header and the second header and arranged in parallel, and fins arranged in an air gap between the adjacent tubes and exchanging heat with the refrigerant flowing inside the tubes. The vapor phase refrigerant introduced into the lower chamber inside the first header or the second header is caused to flow through the tube, and the liquid phase refrigerant which has been liquefied by removing heat is discharged from the upper chamber inside the first header. At least one tube of the plurality of tubes in the discharge condenser introduces the liquid phase refrigerant stored in the chamber above the second partition plate into the chamber above the first partition plate. A condenser characterized by: