JP3043051B2 - Heat exchange equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat exchange device used as, for example, an indoor unit for a room cooler.

2. Description of the Related Art Conventionally, as a heat exchanger such as an indoor unit for a room cooler, a tube-type evaporator, that is, a plurality of thin plate-like fins are arranged in parallel with a predetermined gap, and a plurality of fins are arranged on these fins. A heat pin equipped with a type of evaporator, in which a hairpin-shaped pipe is inserted in a penetrating manner and expanded so as to be in close contact with the fins, and each end of the pipe is communicated with a U-shaped pipe. Exchange equipment was used.

However, in the heat exchange device using such an expansion-type evaporator, there is a limit in improving the heat exchange efficiency.

Therefore, it is conceivable to use a so-called multi-flow type evaporator which is more excellent in heat exchange efficiency, instead of the heat evaporator. In this type of heat exchanger, as shown in FIGS. 4 and 5, a plurality of flat tubes (13) are arranged in parallel and fins (14) are arranged between adjacent tubes. The tubular hollow headers (11) and (12) are connected to both ends of the tube (13). In the figure, (15) is a refrigerant inlet pipe, (16) is an outlet pipe, and (C ') is a fan.

By the way, in the indoor unit for the room air conditioner, it is necessary to make the whole as compact as possible in relation to the installation space. Therefore, as shown in FIGS. 4 and 5, the evaporator (A ') may be arranged in the air flow passage in the casing (B') at a slant with respect to the air flow direction for the sake of compactness. Many.

However, even if the evaporator is installed at an angle,
The whole was not able to respond to the demand for bulky and compact. Needless to say, shortening the length of the evaporator makes it possible to reduce the size of the evaporator, but in this case, it has another problem that the heat exchange performance is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is possible to reduce the size of the entire apparatus or to increase the heat exchange efficiency when the apparatus is kept the same size. It is intended to be provided.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a heat exchanger in which a plurality of flat tubes and fins are alternately arranged, and both ends of each tube are connected to a pair of hollow headers. A heat exchanger which is bent in a substantially V-shape at an intermediate portion in the longitudinal direction of the tube, and which has a bent portion on the windward side in the air flow direction. A heat exchanger having a substantially V-shape disposed in the air flow passage with a leeward side, wherein a tube and a fin are divided at the bending portion, and a divided end of the tube is bent at the bending end. It is characterized in that it is connected to an intermediate header provided in the component part.

The heat exchanger is arranged in the air flow passage in a substantially inverted V-shape with the curved portion on the windward side or a V-shaped shape with the curved portion on the leeward side in the air flow direction. When the tube is used, at least the apparent length of the heat exchanger in the air flow direction can be shortened, and the whole apparatus can be made compact. On the other hand, if the size of the device is the same, a heat exchanger having a long tube length can be accommodated, so that the heat exchange efficiency increases.

In addition, the refrigerant that has flowed in from one of the tube groups is once merged in the intermediate header, and then flows out to the other tube group after being stirred, so that the heat exchange efficiency is improved as compared with the case where the header exists only at both ends. .

Embodiment Hereinafter, a description will be given based on an illustrated embodiment in which the present invention is applied to a heat exchange device used as an indoor unit for a room air conditioner.

In the heat exchange device shown in FIGS. 1 and 2,
(B) is a casing, (A) is an evaporator housed in the casing, and (C) is a fan arranged at the lower center of the evaporator.

The evaporator (A) has a pair of headers (1) at both ends.
(2) is arranged and has a core part (7) bent in a substantially inverted V-shape in side view. The core part (7) is composed of a plurality of flat tubes (3) arranged in parallel with a predetermined gap therebetween and fins (4) interposed in the air flow gap. The flat tube (3) is formed of an extruded member made of an aluminum material. For the purpose of improving pressure resistance, a flat porous extruded member called a so-called harmonica tube having a reinforcing wall therein is preferably used. . However, an electric resistance welded tube or the like may be used in place of such an extruded die. The fin (4) interposed between the adjacent tubes (3) is a so-called corrugated fin bent in a meandering shape, and is joined to the tube (3) by brazing. The fins (4) are desirably cut and raised louvers, and may be wider than the tubes (3) for the purpose of improving heat exchange efficiency.

The pair of headers (1) and (2) connected to both ends of the core portion (7) are each formed of one aluminum pipe material having a circular cross section. These headers (1) and (2) have tube insertion holes (1a)
(2a) is drilled, and the ends of the tubes (3) are inserted into the insertion holes (1a) and (2a), and are firmly connected in a liquid-tight state by brazing.

As for the above brazing, headers (1) and (2)
Are formed by an electric resistance welded tube made of a brazing sheet having a brazing material layer formed on the outer surface thereof, and the fins (4) are formed by the brazing sheet.
(2) The productivity is improved by carrying the tubes (3) and the fins (4) in a temporarily assembled state into a vacuum heating furnace or the like and joining them together by brazing. Is highly desirable.

The core portion (7) composed of the tube (3) and the fins (4) is bent at a middle bent portion (70) in the longitudinal direction of the tube (3) into a substantially inverted V shape in a side view. ing. Then, in this curved part (70), the tube (3)
And the fins (4) are divided right and left, and the divided end of the tube (3) is connected to an intermediate header (9) provided in the bent portion (70). Furthermore, the tube groups on both sides of the intermediate header (9) are connected to the intermediate header (9) in an alternately arranged state shifted by a half tube pitch.

A refrigerant inlet pipe (5) is attached to the outer surface of one header (2) at one end, and the other header (1)
A refrigerant outlet pipe (6) is attached to the outer surface of the other end.
As shown in FIG. 2, the refrigerant flowing from the refrigerant inlet pipe (5) flows through all the refrigerant passages constituted by the tubes (3) and flows out of the refrigerant outlet pipe (6). (3) It exchanges heat with air flowing through the air flow gap including the fins (4) formed between (3) and evaporates.

As shown in FIG. 1, the evaporator has a substantially reverse V in which the bent portion (70) is located on the windward side with respect to the downward air flow direction W.
A shape is arranged in the air flow passage.

In the heat exchange device shown in FIG. 1, the intake air is blown out of the casing (B) by the fan (C) after passing through the entire core (7) of the evaporator (A) evenly. During this time, the air exchanges heat with the refrigerant flowing in the tube (3) of the evaporator and is cooled. Further, as shown in the figure, since the evaporator (A) is installed so as to be substantially V-shaped with respect to the air flow direction, the following advantages are obtained. That is, dew water generated by condensation of the flowing air adheres to the surface of the tube (3), and the dew water moves in the direction of the header on both sides along the tube by the urging force of the flowing air. Therefore, there is an advantage that the so-called water splash, in which the condensed water generated in the central portion of the core portion (7) is directly blown off to the flowing air, can be suppressed, and the condensed water can be smoothly discharged from both end header portions.

Further, the tube (3) and the fin (4) are divided right and left at the bending portion (70), and the divided end of the tube (3) is connected to the intermediate header (9), and the intermediate header (9) is connected. Since the tube groups on both sides of 9) are connected to the intermediate header (9) in an alternately arranged state shifted by a half tube pitch, the refrigerant flowing from one of the tube groups is once joined by the intermediate header (9), After being stirred, it flows out to the other tube group, and there is an advantage that the heat exchange efficiency can be improved as compared with the case where headers are present only at both ends.

In the above embodiment, the case where the evaporator is arranged in the air flow passage in a substantially inverted V-shape has been shown. However, as shown in FIG. 3, the evaporator has a curved portion (70) on the leeward side. It may be arranged in the air flow passage so as to form a V shape.

In the embodiment shown in FIG. 3, FIG. 1 and FIG.
Corresponding parts with the same names as those in the first embodiment shown in the drawing are denoted by the same reference numerals, and description thereof will be omitted.

Although not shown, the evaporator has a refrigerant inlet pipe (5) and an outlet pipe (6) both attached to both ends of one header (1), and the length of the header (1). A partition member is provided in the middle of the direction, and the refrigerant flowing from the inlet pipe (5) reaches the other header (2),
It may be one that makes a U-turn and flows out of the outlet pipe (6).

Effect of the Invention As described above, the heat exchanger according to the present invention has a heat exchanger in which a plurality of flat tubes and fins are alternately arranged and both ends of each tube are connected to a pair of hollow headers. The heat exchanger is bent in a substantially V-shape at an intermediate portion in the longitudinal direction of the tube, and a substantially inverted V-shaped portion or a leeward portion having a bent portion in the airflow direction with the bent portion on the windward side. A heat exchange device having a substantially V-shaped side and disposed in an air flow passage, wherein a tube and a fin are divided at the bending portion, and a divided end of the tube is connected to the bending portion. And is connected to an intermediate header provided in the communication device. Therefore, first, since the heat exchanger to be used is a multi-flow type, the heat exchange performance can be improved as compared with the tube-type heat exchanger itself. Further, since the multi-flow type heat exchanger is bent in a substantially V shape and is disposed in a substantially V shape or a substantially inverted V shape with respect to the air flow direction, a linear heat exchanger is provided. If the lengths of the heat exchangers (tube lengths) are the same as compared with the above, at least the apparent length in the air flow direction can be reduced, and the size of the entire heat exchange device can be reduced in size. In addition, the position of the drain pan can be raised, and the drain treatment can be facilitated. On the other hand, when the size of the entire device is the same, a heat exchanger having a long heat exchanger length (tube length) can be accommodated, so that the heat exchange performance can be increased.

In addition, the refrigerant flowing from one of the tube groups is once merged at the intermediate header, stirred and then flows out to the other tube group, so that the heat exchange efficiency is lower than in the case where the header exists only at both ends. It has the advantage of improving.

[Brief description of the drawings]

FIG. 1 is a front view of a heat exchanger showing a first embodiment of the present invention, FIG. 2 is a perspective view of a heat exchanger used in the apparatus of FIG.
FIG. 3 is a front view of a heat exchange device according to a second embodiment of the present invention, FIG. 4 is a front view of a heat exchange device using a multi-flow type heat exchanger that is not bent into a V shape, and FIG. FIG. 5 is a perspective view showing a heat exchanger and a fan used in the apparatus of FIG. (1) (2) ... header, (3) ... flat tube,
(4) fin, (7) core part, (70) composed part, (9) intermediate header

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F28D 1/00-9/04 F24F 1/00-1/02 F25B 39/00-39/04 F28F 9 / 00-9/26

Claims (1)

(57) [Claims] A plurality of flat tubes (3) and fins (4) are alternately arranged, and both ends of each tube (3) are connected to a pair of hollow headers (1) and (2). The heat exchanger (A) is bent in a substantially V-shape at an intermediate portion in the longitudinal direction of the tube (3), and the bent portion (70) is formed in the air flow direction. A heat exchange device is provided in the air flow passage in a substantially inverted V-shape having a windward side or a substantially V-shaped shape having a bent portion on the leeward side, wherein a tube is provided at the bent portion (70). (3) The fin (4) is divided, and the divided end of the tube (3) is connected to an intermediate header (9) provided in the bent portion, and the heat exchange is performed. apparatus.