JPS63263332A - Heat exchanging unit - Google Patents

Abstract

PURPOSE:To uniformize the distribution of air sucked into a heat exchanger and miniaturize the heat exchanging unit, by a method wherein the heat exchanger is arranged so as to be oblique with respect to a ventilating port and a fan, constituted of a plurality of cross-flow fans having different lengths, is arranged along the heat exchanger while a compressor is arranged in parallel to the shorter cross-flow fan. CONSTITUTION:A first heat exchanger 9 is a plate fin type heat exchanger and the fins 15 thereof are arranged horizontally while heat exchanging pipes 16 are arranged vertically. A second heat exchanger 17 is the plate fin type heat exchanger having a length about one half of the vertical size of the heat exchanger 9 and fins 22 are arranged vertically while heat exchanging pipes are arranged so as to run horizontally. Air sucked into the upper half of the rear side heat exchanger and the other parts is guided by guide plates 40, 34 and flows to cross-flow fans 27, 26 respectively. The diameter (e) of the second cross-flow fan 27 is smaller than the diameter (d) of the fan 26; therefore, the rotating speed of the fan 27 is designed so as to be higher than the rotating speed of the fan 26 so as to equalize the flow rate of air discharged by respective cross-flow fans 26, 27. Accordingly, the distribution of air sucked into the heat exchanger 9 from a suction grille 7 is uniformized while a compressor is arranged below the fan 27; therefore, the heat exchanging unit may be miniaturized.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to a heat exchange unit for a separate air conditioner.

(b) Prior Art Conventionally, an example of the structure of this type of heat exchange unit is shown in Japanese Utility Model Publication No. 19397/1983.

According to this content, the interior of the vertically long housing was divided into an upper heat exchange chamber and a lower machine room by horizontal partition plates. A compressor is installed in the machine room, and the suction and discharge ports leading to the heat exchange room are arranged side by side on the front of this housing, and the heat exchanger is installed diagonally with respect to the depth direction of this housing. The heat exchanger was placed vertically, and a cross flow fan was placed facing the heat exchanger.

As the cross-flow fan rotates, room air is sucked in from the suction port, cooled by a heat exchanger, and then blown out from the discharge port.

(8) Problems to be solved by the invention In such a structure, since the heat exchanger is arranged diagonally with respect to the suction port, it is difficult to uniformize the distribution of the air sucked in, resulting in poor heat exchange efficiency. is possible.

Furthermore, since a machine room in which the compressor is housed is provided below the heat exchange room, there is a risk that the height of the housing will increase.

The present invention aims to equalize the distribution of air sucked into the heat exchanger in a heat exchange unit in which the heat exchanger is arranged diagonally with respect to the suction port, and to downsize the casing of the heat exchange unit. It is intended to.

(d) Means for solving the problem In order to achieve this object, the present invention arranges a heat exchanger obliquely with respect to the ventilation hole, and also connects the blower with a plurality of cross-flow blowers having different lengths. It consists of fans, these fans are arranged along the heat exchanger, and the compressor is arranged vertically with the shorter cross-flow fan.

(*) Effect The rotation of multiple cross-flow fans makes it easier to equalize the distribution of air sucked into the heat exchanger, and by arranging short cross-flow fans and compressors vertically, the height of the housing can be reduced. This heat exchange unit is placed in the vibration shaft of a high-rise building (residential building). This vibe shaft is a space (room) in which gas pipes, etc. pass through each floor of a high-rise building, and this space is separated from the outside by a door or other means that is open enough to prevent children from entering.

This heat exchange unit 1 is composed of an outer box 2, a main body 3, and a front panel 4. This outer box 2 has a vertical dimension a of 7 gQIIIn, a horizontal dimension of 240 m, and a depth dimension C of 3
It has a vertically elongated shape of 80 m, with the front part 5 and bottom part 6 open, and the outer box covers both sides, the rear side, and the top of the main body 3. This front panel 4 is attached to the front part 5 of the outer box 2, and has a suction grill (suction port) 7 formed on the left side of this panel, and a discharge grill (discharge port) 8 formed on the right side.

9 is a first heat exchanger, which is diagonally (
It is erected diagonally with respect to the depth direction of the main body 3. The tip 10 is the front edge 12 of the bottom plate 11 of the main body 3.
In addition, the rear end 13 is located on the left side edge 14 of the bottom plate 11. The first heat exchanger 9 is a plate-fin type heat exchanger, and is erected so that the fins 15 are horizontal and the heat exchange pipes 16 run vertically. 17 is a second heat exchanger whose vertical dimension is about half the length of the first heat exchanger 9, and is located along the right side surface 18 of the first heat exchanger 9 and between the respective heat exchangers 9, It is erected so that the 17 top comrades are aligned. The tip 19 of the second heat exchanger 17 extends near the second U-shaped tube 20 of the first heat exchanger 9, and the rear end 21 extends further rearward than the rear end 13 of the first heat exchanger 9. This second heat exchanger 17 is also a plate-fin type heat exchanger, and is erected so that the fins 22 are vertical and the heat exchange vibes 23 run horizontally. In this way, the two heat exchangers 9 and 17 are combined with a slight shift, and the rear heat exchange section 24 is composed of two rows of heat exchange pipes, and the front heat exchange section 25 is composed of one row of heat exchange pipes. The heat exchange area of the rear heat exchange section 24 is larger than that of the front heat exchange section 25.

26L [1 is a cross-flow fan, 27 is a second cross-flow fan, and both fans constitute the blower of this heat exchange unit. Both fans 26 and 27 are arranged along the second heat exchanger 17, respectively. The first crossflow fan 26 has a diameter d of 90w1, a length that is approximately the same as the height of the first heat exchanger 9, and a lower end 2B connected to an AC motor 29 for driving. There is. This motor rotates at 1200 rpm. The second cross flow fan 27 has a diameter C of 80 m1, has a length that is approximately the same as the height of the second heat exchanger 17, and has a lower end 30 connected to a DC motor 31 for driving. . This motor 31 rotates at 1800 rpm.

In this way, the diameter e of the second cross flow fan 27 is made smaller than the diameter d of the first cross flow fan 26,
And the rotation speed of this second cross flow fan 27 is gl
The rotation speed of the second cross flow fan 27 is set to be higher than the rotation speed of the second cross flow fan 27, and the air volume discharged from the second cross flow fan 27 and the first cross flow fan 27 are
The air volume discharged from the cross flow fan 26 is set to be approximately the same as that of the cross flow fan 26.

Reference numeral 32 denotes a first wind guide plate, which is bent into a substantially U-shape, and has one end 33 located at the tip 10 of the first heat exchanger 9 to serve as a tongue of the first cross-flow fan 26. .

34 is a second wind guide plate, and the front surface 35 of the upper part 37 is the first wind guide plate.
The rear casing of the second cross-flow fan 26 is bent into a cylindrical shape so that the rear surface 36 becomes the tongue of the second cross-flow fan 27. Also, this second wind guide plate 3
4 extends rearward along the right side surface 18 of the first heat exchanger 9 , and the rear end 39 is connected to the rear end 13 of the first heat exchanger 9 .
It is connected to the. Air from the lower half of the rear part 24 of the first heat exchanger 9 is guided to the first cross flow fan 26.

40 is a third wind guide plate, which is a second cross flow fan 27
The height of this plate is approximately the same as that of the second cross flow fan 27, and the lower end 41 is bent toward the second wind guide plate 34 to form the rear casing of the second cross flow fan 27. It is fixed to the outer surface 42 of the wind guide plate 34. The rear end 43 of this third wind guide plate 40 is connected to the second heat exchanger 1.
It is attached to the rear end of 7.

44 is a compressor, which connects the lower part 38 of the second wind guide plate 34 and the third
It is arranged in a space surrounded by the bottom surface 45 of the wind guide plate 40. When the compressor 44 is arranged in this manner, the compressor 44 is located below the second cross flow fan 27. In other words, the second cross flow fan 27 and the compressor 4
4 are lined up almost vertically.

Reference numeral 45 denotes an electrical component (capacitor) that controls the operation of the heat exchange unit 1, which is attached to the back of the third air guide plate 40 and the outer box 2.
It is arranged in a space surrounded by a side surface 46 and a rear surface 47.

Reference numeral 48 denotes a service pulp, which is attached to the back surface of the bottom plate 11 of the main body 3. This service pulp 48 is connected to inter-unit piping from an indoor heat exchange unit (not shown) installed indoors.

In this way, a heat exchanger, a blower, and a compressor are arranged in the main body 3, and when the outer box 2 is placed on the main body 3 and the front part 5 of the outer box 2 is covered with the front panel 4, the suction grill 7 is installed. A ventilation passage 49 facing the first heat exchanger 9 and formed by the respective wind guide plates 32, 34, 40 is connected to the discharge grille 8.

In the heat exchange unit 1 configured in this way, when both the cross flow fans 26 and 27 are rotated, the air sucked into the lower half of the front heat exchange section 25 and the rear heat exchange section 24 is converted into a second wind. The air is guided by the guide plate 34 to the first cross flow fan 26, and the air sucked into the upper half of the rear heat exchange section 24 is guided to the third wind guide plate 40 to form the second cross flow fan 26. Each stream flows to fan 27. The air discharged from the respective cross flow fans 26 and 27 is completely blown out from the discharge grille 8 through the respective ventilation passages 49. Also, since the diameter e of the second cross flow fan 27 is smaller than the diameter d of the first cross flow fan 26, the rotation speed of the second cross flow fan 27 is set to be higher than the rotation speed of the first cross flow fan 26. Thus, the air volume discharged from each of the cross flow fans 26 and 27 is made to be approximately the same. Therefore, the distribution of the air sucked into the heat exchanger 9 from the suction grill 7 is made uniform, and the heat exchange efficiency is improved. In addition, the compressor 44 is located below the second cross flow fan 27, which has a short length, so that the height of the heat exchange unit 1 is kept low.

(g) Effects of the invention As described above, the present invention has a heat exchanger arranged diagonally with respect to the front ventilation hole, and a plurality of cross flow fans are arranged along this heat exchanger, so that heat exchange is possible. The heat exchange rate can be improved by making the distribution of air sucked into the container uniform, and the width of the ventilation port can be reduced.

Furthermore, we changed the length of multiple cross-flow fans and placed the compressor below the shorter cross-flow fan.
The height of the heat exchange unit can be kept low, and in combination with the aforementioned reduction in the width of the ventilation hole, the size of the heat exchange unit can be reduced.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a heat exchange unit of the present invention, and FIG. 2 is a cross-sectional view of the same unit. 7...Suction port, 8...Discharge port, 9...First
Heat exchanger, 17...Second heat exchanger, 26...
1st cross flow fan, 27... 2nd cross flow fan, 44... compressor.

Claims (1)

[Claims] (1) A suction port and a discharge port are arranged side by side on the front surface of a vertically long housing in which a compressor is built, and a ventilation passage connecting these suction ports and discharge ports is placed diagonally with respect to the depth direction of the housing. In a heat exchange unit in which a heat exchanger and a blower are installed, the blower is composed of a plurality of cross-flow fans of different lengths, and these fans are arranged one behind the other along the heat exchanger, and the compressor is A heat exchange unit characterized in that the heat exchange unit is arranged vertically with a shorter fan among the fans.