JPS63290394A - Heat exchanger - Google Patents

Abstract

PURPOSE:To reduce draft resistance by causing air flowing slantingly to a heat exchanger to flow out without changing forcibly its flow direction by a method wherein the row direction of pipes and the rising lines and folded lines of slits cut and raised on a fin surface are slanted to the edge of the fin. CONSTITUTION:A large number of pipes 2 are inserted into a fin 1 at right angles. The row direction of the pipes makes an angle of beta to the edge of the fin. The size of beta is larger than 60 deg. for staggered arrangement of equilateral triangles and smaller than 90 deg. for a checkerboard arrangement. On the fin surface a large number of slits 3 are cut and raised. The rising line 4a and folded line 4b of the slit are together in parallel to the row direction of the pipes and make an angle of beta to the edge of the fin. Thereby, inflow air 6 flows in the direction of the pipes and are hardly bent and becomes outflow air 7 to flow away. When the air passes through over the fin surface, the air is in contact with a large number of slit edge surfaces 5 to promote heat exchanging.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat exchanger unit used as an indoor unit of a room air conditioner, and relates to a 1% front panel, top suction type heat exchanger unit.

[Conventional technology]

In the conventional device, the pipes are arranged in an equilateral triangular staggered arrangement, and the cutting direction of the slits is inclined, as described in Japanese Patent Application Laid-Open No. 61-241497.

JP-A No. 61-243291 describes an example in which the rising line of the slit is provided parallel to the direction of the pipe row and is parallel to the end surface of the slit.

JP-A No. 61-243292 further describes an example in which the arrangement of pipes is gradually shifted.

[Problem that the invention seeks to solve]

All of the above conventional technologies assume that the air inflow direction is perpendicular to the fin end face, and do not consider the fact that the intake air flows diagonally to the fins, and the air flows at the entrance and exit of the heat exchanger. Since it is forced to bend, there is a problem in that the ventilation resistance increases.

An object of the present invention is to obtain a heat exchanger unit with low ventilation resistance by allowing air to pass through the heat exchanger smoothly without bending when the air flows obliquely into the heat exchanger.

[Problem 1! -Means for solving the problem] The above purpose is to set the angle of the pipes in one row to be more than 60 degrees and less than 90 degrees with respect to the fin end face, so that all the slits cut and raised on the fin face can be raised. This is achieved by making the lines and fold lines parallel to the pipe row direction, making the cut lines and end faces of the slits parallel to the fin end faces, and arranging the air introduction panel on the front surface of the air inflow side of the heat exchanger.

[Effect]

Due to the alignment angle of the pipes in the row direction, which is set at more than 60 degrees and less than 90 degrees with respect to the fin end face, and the guiding action of the air introduction panel, the air that flows in diagonally is not forced to bend, and the pipes are arranged in the same direction. Flow parallel to the angle. Also 7
All the rising lines and folds of the slits cut out on the 47th surface.

By making these slits parallel to the pipe row direction, these slits themselves also have the effect of causing air to flow in the pipe row direction. In other words, the polygonal lines of the slits guide the flow of air.

By making the cut line and end face of the slit parallel to the fin end face, it is possible to provide a large number of slit parts.
As a result, a high heat transfer coefficient can be obtained while air flows diagonally through the heat exchanger.

〔Example〕

An embodiment of the present invention will be explained below with reference to FIG. A large number of pipes 2 are inserted perpendicularly to the fins 1. According to this embodiment, the pipe row direction forms an angle β with the fin end face. The size of β is 60 in the case of equilateral triangular staggered arrangement.
The value is larger than 90 degrees and smaller than 90 degrees when the base is arranged. A large number of slits 3 are cut and raised on the fin surface.

At the top of the slit, the line 4a and the bending line 4b are both parallel to the pipe row direction and form an angle of β with respect to the fin end surface. As a result, the inflow air 6 flows in the direction of the pipe row, becomes outflow air 7 without being bent, and flows away.

When air passes over the fin surface, a large number of slit end surfaces 5
heat exchange is promoted. Since the slit end surface 5 is provided parallel to the fin end surface, the slit can be provided on most of the fin surface. thus.

Since the air flows in the inflow direction, a heat exchanger with low ventilation resistance and high heat transfer coefficient can be obtained.

Figure 2 shows the front panel of the heat exchanger of the present invention.

This is an example of application to a top-suction type room air conditioner indoor unit. The front of the indoor unit is a panel 9, and all the air flows through the air inlet 6 from the upper air inlet.
It becomes sucked in. In the heat exchanger of the present invention, since both the pipe row direction and the slit fold 'i'' L line are provided obliquely, the air passes through smoothly without being bent, and the air flows through the fan 8 and the casing 10. It is blown out as outflow air 7 from the outlet.Therefore, the air inside the indoor unit has no loss and 1 has low ventilation resistance, making it possible to obtain a quiet and energy-saving room air conditioner. .

FIG. 3 shows another embodiment in which the draining performance is improved by continuously changing the height of the slit. FIG. 4 shows yet another embodiment in which a non-cut raised portion is provided in the middle of the slit to increase the strength of the slit and improve the air guiding effect.

〔Effect of the invention〕

As described above, (1) according to the present invention, the air that has flowed obliquely into the heat exchanger can be flowed out smoothly without being forced to bend, (1) ventilation resistance is reduced, and the air is quiet and energy-saving. type of room air conditioner can be realized.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a heat exchanger according to an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view when the present invention is applied to a front panel, top suction type indoor unit, Fig. 3, FIG. 4 is a longitudinal sectional view of a heat exchanger according to another embodiment of the present invention. 1...Fin, 2...Pipe, 3...Slit,
4a... rising line, 4b... folding 9 line, 5... slit end face. 6...Inflow air, 7...Outflow air, 8...Fan, 9...Lth port 4α・L chi2ke"ff17...SiL? Entering the dormitory 2 Koku δ...Fan 9 -...R & Gino V Mettle

Claims (1)

[Claims] 1. In a cross-fin tube heat exchanger unit used in an air conditioner, the pipe arrangement angle in the row direction is more than 60 degrees and less than 90 degrees with respect to the fin end surface,
All rising lines and fold lines of the slits cut on the fin surface should be parallel to the pipe row direction, and the cut lines and end faces of the slits should be parallel to the fin end face, and the front panel on the air inlet side of the heat exchanger should be parallel to the pipe row direction. A heat exchanger unit characterized in that it is attached.