JPH0741324U - Air conditioner indoor unit - Google Patents

Abstract

(57) [Summary] [Purpose] A heat exchanger consisting of three blocks, an upright part and a backward slanted part and a forward slanted part, which are bent in an inverted V shape, is arranged in the indoor unit. An object of the present invention is to provide an indoor unit of an air conditioner having a structure in which the fins of the inverted V-shaped bent portion are narrowed to improve the efficiency of heat exchange and are connected by a common U-shaped tube. A notch portion 7a is formed in a fin 6 between a rear inclined portion 5b and a front inclined portion 5c, and a front half of the fin 6 is cut to form a shape in which end portions contact each other when bent in an inverted V shape. . The upper side plate 10c is inserted into the protruding throttle hole 13a of the lower side plate 10 into which the rear uppermost pipe of the rear inclined portion 5b is inserted.
The holes 13 at the lowermost rear portion are fitted and connected to each other to integrally form the heat exchanger 5. By bending the front inclined portion 5c into an inverted V shape around the pipe as an axis, there is no gap in half of the fins 6, and the pitch of the U-shaped pipes connecting the heat exchangers becomes the same as the pitch in the step direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an indoor unit of an air conditioner, and more particularly to a bending structure between heat exchangers composed of three blocks.

[0002]

[Prior art]

 As shown in FIG. 4, the indoor unit of the air conditioner includes an upright portion 5a and a rearwardly inclined portion 5b on the front side of an air passage 4 which connects an inlet 2 on the upper surface of a housing 1 and an outlet 3 on the lower front surface. On the back side, three heat exchangers 5 that are formed in an inverted V shape and that are formed of a folded front inclined portion 5c are integrally arranged. As shown in FIG. 5, a cutout portion 7 having a width of approximately half is formed at a predetermined position in the rear two places of the fin 6, and a notch 9 is formed at the same position in the two places, leaving the flange 8 at the same position. A pipe (not shown) is inserted into the left and right side plates 10 with the fins 6 sandwiched between them and the pipes are expanded to integrally form the heat exchanger 5. The front half of the fin 6 is cut laterally at the position of the cutout portion 7 at two places, the lower portion is an upright portion 5a, and the central portion is bent backward to form a rear inclined portion 5b. The three heat exchangers 5 are integrally formed by bending them into a front inclined portion 5c. As shown in FIG. 6, the bent portion 11 between the three heat exchangers 5 has the flange 8 of the side plate 10 as the bending center, and the fin 6 is the rear end of the cutout portion 7 which is necessary during processing. Is only left with a slight width. In particular, a wide gap is formed between the rear sloped portion 5b and the front sloped portion 5c, which is bent at an acute angle and is connected to the flange 8 by the fin 6 having a slight width. The bent portion 11 has a lower ventilation resistance than the other laminated fins 6 and has a higher wind speed, and a large amount of indoor air that is not heat-exchanged passes through to reduce efficiency. There is a problem that the wind shield 12 is provided on the bent portion 11 and a measure for suppressing passage of indoor air that is not heat-exchanged is required. The U-shaped pipe (not shown) connecting the ends of the pipes inserted in the fins 6 has two kinds of pitches in the row direction a and the step direction b, and another pipe connecting the heat exchangers. There was a problem that required a U-shaped tube of the touch c.

[0003]

[Problems to be solved by the device]

 In order to solve the above-mentioned problems, the present invention does not require a windshield 8 or a U-tube with another pitch, and is an indoor unit of an air conditioner equipped with a highly efficient heat exchanger consisting of three blocks. The purpose is to provide a unit.

[0004]

[Means for Solving the Problems]

 According to the present invention, in the air passage that connects the suction port on the upper surface of the housing and the air outlet on the lower front surface, a cutout portion of approximately half width is formed on the rear end side at a predetermined position from the lower end, while a predetermined cutout is formed from the upper end. A fin with a cutout of approximately half width on the rear end side of the position, a lower side plate cut out leaving a flange part at the same position as the cutout part of the fin, and a rear part below the cutout part of the fin. The uppermost pipe is formed integrally by sandwiching the upper side plate with the lower side plate and the upper side plate formed with the hole to be inserted together with the connected side plate, and cutouts and notches and the front end side are cut, and the lower part is upright. The heat exchanger is characterized in that the central portion is bent rearward to form a rearwardly inclined portion, and the upper portion thereof is bent in an inverted V shape on the back side with the pipe as an axis to form a forwardly inclined portion. In addition, a protruding throttle hole for inserting the rearmost uppermost pipe is formed in the side plate that sandwiches the fin which is the upright portion and the rearward inclined portion, and the rear lowermost hole of the upper side plate is formed on the outer periphery of the protruding throttle hole. After fitting, the pipe is inserted and expanded to connect the side plate and the upper side plate, and the pipe is used as an axis to bend the upper part in a reverse V shape to form a front inclined part. Furthermore, between the fins that form the rearwardly inclined portion and the forwardly inclined portion, there is no hindrance to bending and there is no gap between the two heat exchangers after the bending with the pipe as an axis. It is characterized in that a notch portion is formed.

[0005]

[Action]

 According to the present invention, a notch is formed in a fin between a rear slant portion and a front slant portion of a heat exchanger consisting of three blocks, and when the front half of the fin is cut and bent into an inverted V-shape, both fins are bent. Are formed in such a shape that the ends of the two contact with each other. In addition, the hole in the lower side plate into which the uppermost pipe in the rear part of the rear slanting part is inserted is used as a projecting throttle hole, and the upper side plate of the front slanting part is provided with a hole that fits on the outer periphery of the projecting restricting hole and is superposed. To connect. As a result, there is no gap in the half of the fin in which the front inclined portion is bent at an acute angle around the pipe. In addition, the pitch of the U-shaped pipe that connects the pipes of the two heat exchangers becomes the same as the pitch in the step direction by bending around the pipe.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 2 (A), a cutout portion 7 having a width of approximately a rear half is formed at a predetermined height from the lower end of the fin 6, and a notch portion 7a having a width substantially half a rear is formed at a predetermined height from the upper end. To form. As shown in FIG. 2B, a notch 9 is formed in the same position as the cutout 7 leaving a flange 8 and a lower side plate 10 having a length from the lower end of the fin 6 to the notch 7a. An upper side plate 10c having a length from the cutout portion 7a to the upper end of the fin 6 and having a hole 13 into which the pipe of the rear uppermost stage below the cutout portion 7a is inserted together with the lower side plate 10 is formed. A plurality of pipes (not shown) are inserted with the fins 6 laminated on the lower side plate 10 and the upper side plate 10c having the common holes 13 overlapped with each other, and the pipes are expanded to integrally form the heat exchanger 5. As shown in FIG. 1, the fins 6 are laterally cut at the positions of the cutouts 7 and the cutouts 7a, the lower portion is the upright portion 5a, and the central portion is bent backward to form the rear inclined portion 5b, and the upper portion is the rear surface. A heat exchanger 5 having three blocks formed by bending it in a reverse V shape on the side to form a front inclined portion 5c is formed, and an air passage 4 connecting an intake port 2 on the upper surface of the casing 1 and an outlet port 3 on the lower front surface is formed. The heat exchanger 5 is arranged on the front side. As shown in FIG. 3, a protruding throttle hole 13a for inserting the pipe at the rear uppermost stage is formed in the lower side plate 10 that sandwiches the fins 6 that form the rearward inclined portion 5b and the front inclined portion 5c. After fitting the hole 13 formed at the lowermost rear part of the upper side plate 10c on the outer periphery, a pipe is inserted and expanded to connect the lower side plate 10 and the upper side plate 10c. The hole 13 of the upper side plate 10c is slid on the outer circumference of the protruding throttle hole 13a, and the upper part of the heat exchanger 5 is bent backward in a reverse V shape around the pipe as a front inclined portion 5c. As shown by the broken line in FIG. 1, between the fins 6 that are the rear inclined portion 5b and the front inclined portion 5c, there is no hindrance to the bending around the pipe, and after the bending, between the two heat exchangers 5. The notch 7a having a shape that does not create a gap is formed.

[0007]

[Effect of device]

 As described above, according to the present invention, a notch is formed in the fin between the rear sloped portion and the front sloped portion of the heat exchanger, and when the front half of the fin is cut and bent into an inverted V-shape, both fins are bent. Are formed in such a shape that their ends are in contact with each other, and the hole of the lower side plate is projected, and the outer periphery of the throttle hole and the hole formed in the upper side plate are fitted and superposed and connected. As described above, the front slanted portion can be easily bent around the pipe, and no gap is formed in half of the fins bent at an acute angle, so that efficient heat exchange can be performed. Also, the pitch of the U-shaped pipe that connects the pipes of the two heat exchangers becomes the same as the pitch in the step direction by bending the pipe around the pipe, and a common U-shaped pipe can be used.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of a fin according to an embodiment of the present invention.

FIG. 2A is a schematic view of a fin according to an embodiment of the present invention, and FIG. 2B is a perspective view showing a connecting portion of a side plate.

FIG. 3 is an enlarged perspective view showing a connecting portion of a side plate within a circle of FIG. 2 (B).

FIG. 4 is a cross-sectional view showing an outline of an indoor unit accommodating a heat exchanger according to an embodiment of the present invention.

FIG. 5 is a side view showing an outline of a conventional heat exchanger, where (A) is a fin, (B) is a side plate, and (C) is a bent heat exchanger.

FIG. 6 is a side view showing an outline of a conventional heat exchanger after bending.

[Explanation of symbols]

 1 Case 2 Suction Port 3 Air Outlet 4 Air Passage 5 Heat Exchanger 5a Upright 5b Backward Slope 5c Front Slope 6 Fin 7 Cutout 7a Notch 8 Flange 9 Side Plate Notch 10 Lower Side Plate 10c Upper Side Plate 11 Bent part 12 Wind shield 13 Hole 13a Projected aperture hole

Claims (3)

[Scope of utility model registration request] 1. An air passage connecting a suction port on the upper surface of a housing and a blowout port on the lower part of the front surface is formed with a cutout portion having a width of about half at a rear end side at a predetermined position from a lower end, while a predetermined cutout portion is formed from an upper end. At the rear end of the position, a fin with a half-width notch
The lower side plate, which is notched leaving the flange portion at the same position as the cutout portion of the fin, is connected to the upper side plate, which is formed with a hole to be inserted together with the lower side plate in the rear uppermost pipe below the notched portion of the fin. It is sandwiched between the side plates and formed integrally,
Cut the cutouts and notches and the front end side and bend the lower part upright and the central part rearward to form a rearwardly inclined part, and the upper part is bent backward in a reverse V shape around the pipe as an axis to incline forward. An indoor unit of an air conditioner, which is characterized in that a heat exchanger as a part is arranged. 2. A projecting throttle hole for inserting a pipe of a rear uppermost stage is formed in a lower side plate sandwiching the fin which becomes the upright portion and a rearwardly inclined part, and a rear lowermost stage of the upper side plate is formed on an outer periphery of the projecting throttle hole. After fitting the hole of the above, the pipe is inserted and expanded to connect the lower side plate and the upper side plate, and the upper part is bent in a reverse V shape with the pipe as an axis to the back side to form a front inclined part. The indoor unit of the air conditioner according to claim 1. 3. Between the fins forming the rear slanted portion and the front slanted portion, a gap is provided between the two blocks of the heat exchanger after being folded with the pipe as an axis without hindering bending. The indoor unit of the air conditioner according to claim 1, wherein the cutout portion having a shape that does not occur is formed.