JP3170548B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner constituting an indoor unit, for example, and more particularly to an improvement in a heat exchanger structure.

[0002]

2. Description of the Related Art An air conditioner generally used comprises an indoor unit arranged in a room to be air-conditioned and an outdoor unit arranged outdoors, and these units are connected to each other by a refrigerant pipe and electric wiring. .

[0003] From the user's side, there is a great demand for downsizing these units and reducing the installation space, and it is necessary for each manufacturer to increase the heat exchange capacity while satisfying such conditions.

As one of the solutions, in recent years, especially in indoor units, a heat exchanger provided here is bent and formed in a "C shape" to secure a heat exchange area while securing a heat exchange area. The height of the container itself is suppressed, and the height of the unit body is reduced.

By the way, in the indoor unit, air to be conditioned is sucked into the unit body, a heat exchanger is conducted to perform a heat exchange action, and the air after the heat exchange is blown out to the conditioned room again. Fans are arranged, and due to its performance,
A cross flow fan is employed.

This cross flow fan has an axial length substantially equal to the width of the heat exchanger, and is formed along both side end plates made of circular plates and peripheral ends of a partition plate having a predetermined interval.
A large number of blades (blades) are provided at predetermined intervals, and have a substantially circular cross section.

In order to reduce the size of the unit body, the diameter of the cross flow fan is set to a minimum size for securing a required air flow. In the case of the above-described U-shaped heat exchanger, a cross flow fan is disposed on the back side of the bent portion, but depending on the setting of the position of the bent portion, at least one of the upper end or the lower end of the heat exchanger. Since the portion is far away from the cross flow fan, heat exchange air is difficult to be guided, and a difference in heat exchange efficiency occurs partially.

[0008]

Therefore, Japanese Unexamined Utility Model Publication No. Hei 4-14921 discloses, for example, an improved shape of a U-shaped heat exchanger. With such a heat exchanger, rather than a simple U-shaped heat exchanger,
The height can be reduced, and the heat exchange area and the amount of air flow to the heat exchanger can be increased to improve the cooling capacity and the heating capacity.

However, in this type of heat exchanger, the front side heat exchanger and the rear side heat exchanger are formed at a sharp acute angle, so that the blower fan must be arranged below the heat exchanger. In this case, the unit body is long in the vertical direction and becomes large.

Therefore, it is conceivable to widen the angle between the heat exchangers to form a gentle inverted V-shape and arrange a blower fan between these heat exchangers. The inclination angle is too small compared to the amount of drain water generated in the exchanger, and the drain water cannot flow down to the lower end of the heat exchanger, and falls on the way to wet the unit body, A problem such as being blown into the room to be air-conditioned by the blower fan occurs.

The present invention has been made in view of the above circumstances, and an object thereof is to employ a heat exchanger basically having an inverted V-shape and improve the heat exchange capacity of the front-side heat exchanger. It is set to increase the amount of drain water generated, and set so that the heat exchange capacity of the rear heat exchanger is reduced to reduce the amount of drain water generated. Process to improve reliability, improve heat exchange efficiency, and reduce costs from the suction side to the
A constant wind flow can be created, reducing noise and blowing effect
It is intended to provide the obtained that the air conditioner to obtain improved.

[0012]

In order to satisfy the above object, an air conditioner according to the present invention is characterized in that, in the first aspect, a large number of radiating fins are arranged side by side with a narrow gap therebetween. A heat exchanger through which a heat exchange pipe is penetrated, and a blower fan for guiding the air in the room to be air-conditioned to the heat exchanger to perform a heat exchange operation. And an air conditioner body in which an outlet is formed in the lower part of the front surface and the heat exchanger and the blower fan are housed and arranged inside, and forms an inverted V-shape in side view, and the front side heat exchange Comprising a heat exchanger, which is a continuous body of a vessel and a rear heat exchanger,
The connecting portion between the front-side heat exchanger and the rear-side heat exchanger is located on the front side with respect to the center axis of the blower fan, and the front-side heat exchanger has a steep inclination, and the rear-side heat exchanger has an inclination. Is formed loosely, and the front side heat exchanger is
Project the part facing the central axis of the blower fan forward,
The upper and lower parts are rearward so that they surround the front side of the blower fan.
Curved, furthermore, the front side heat exchanger and rear side heat exchanger
The area ratio of the exchanger is at least 2: 1 and is preferably
Characterized the child <br/> that increasing the area of the front side heat exchanger than this percentage.

[0013]

[0014]

The connecting portion between the front heat exchanger and the rear heat exchanger forming an inverted V-shape is located on the front side with respect to the center axis of the blower fan.
Since the front heat exchanger has a steep slope and the rear heat exchanger has a gentle slope, the configuration is in accordance with the amount of drain water generated in each heat exchanger, and drain water treatment can be performed reliably and the blower fan To secure the placement space. Above front
The side heat exchanger is located at the center of the blower fan
The part facing the shaft projects forward, and the upper and lower parts
Since it is curved to the rear side to surround the front side of the fan,
Creating a stable flow of air from the suction side to the outlet side
Not only can improve heat exchange efficiency, but also noise
The reduction and the improvement of the blowing effect can be obtained. Above front heat exchanger
The area ratio between the heat exchanger and the rear heat exchanger is at least 2: 1.
Preferably, the area of the front-side heat exchanger is larger than this ratio.
Large size, large amount of heat
Promotes drain water generation. Preferably from this ratio
Also, if the area of the front heat exchanger is set large,
Effects can be obtained.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an indoor unit of the air conditioner is configured. Unit body 1, which is the air conditioner body
A front suction opening 2a is opened at the front side of the grille, into which a grill 3a is fitted. On the other hand, the upper suction port 2b is also opened on the upper surface side of the unit body 1, and the grill 3b is also provided here.
Is inserted.

An outlet 4 is provided from the front to the lower part of the unit body 1. An air filter (not shown) and a heat exchanger 5 formed as will be described later are opposed to the front part, which is the upper part of the outlet 4, and the upper inlets 2a and 2b.
Is arranged.

Next, the heat exchanger 5 will be described in detail. As shown in FIGS. 2A and 2B, the heat exchanger 5
In the figure, a large number of heat radiation fins 12 are formed in a straight shape having a predetermined width in the left and right directions and long in the vertical direction, and are arranged side by side with a small gap in the direction of the paper, and mounting holes provided in these heat radiation fins 12. 22 and a heat exchange pipe 13 penetrated and fitted.

The radiating fins 12 are formed by press punching in advance, and a V-shaped cut portion 20 is provided at a predetermined position of the upper portion A in the figure, which is horizontal from one side edge 12a and is halfway from the middle. And is extended slightly to the near side of the other side edge 12b.

That is, the portion between the tip of the cut portion 20 and the inner edge 12b of the heat radiation fin 12 is left as the first connection portion 15. A plurality of notches 21 are provided at predetermined intervals from the notch 20 to the lower edge of the fin 12. The notch 21 is located on the upper side 21a.
And a lower side portion 21b. Each side portion is formed by bending at least a plurality of straight lines in a zigzag shape in different directions, and is formed in a bent shape as a whole.

The front end of the notch 21 extends slightly forward of the one side edge 12a, and a second connection is made between the front end of the notch 21 and the one side edge 12a of the radiation fin 12. It is left as part 16.

A connecting portion 17 is integrally formed in the middle of the cutout portion 21. These joints 17
Are the upper side 21a and the lower side 21b forming the notch 21
And the narrow side connecting the middle part with each other,
It is provided in a state inclined at a predetermined angle with respect to the inner and outer edges 12a, 12b.

As shown in FIG. 2C, a substantially intermediate portion of the connecting portion 17 is formed in a triangular cross section so as to protrude in a predetermined surface direction, and has a fold at a top portion and a base end portion. 18 are formed.

The folds 18 are provided so that when the radiating fins 12 are bent along the cutouts 21 as described later, all the connecting portions 17 themselves protrude in the same direction and are folded.

Each of the mounting holes 2 except between the mounting holes 22 on the upper and lower sides via the cutout 20 and between the mounting holes 22 on the upper and lower sides via the notch 21.
A rising slit portion 24 is provided between the two.

The rising slit portions 24 are made up of rising pieces formed by cutting and raising the heat radiation fins 12 in the vertical direction and on both surfaces thereof, so that heat exchange air guided along both surfaces of the fins is efficiently provided. You can get in touch.

The radiation fin 12 thus formed
The pair of mounting holes 22 penetrate through each other, and in particular, a heat exchange pipe 13 bent in a U-shape, shown only in FIG.

Then, U-bends (not shown) are connected to the open ends of the adjacent heat exchange pipes 12 to form a flat heat exchanger, and then the cut portions 20 and the cut portions 21 are formed.
To bend. All are radiation fins 12
By applying a biasing force from one side edge 12a to the other side edge 12b, each part is bent inward.

As shown in FIG. 1 again, the notch 2
By the bending process along 0, a two-part heat exchanger is formed in which the upper part and the lower part side are bent at an acute angle from the cut portion.

Here, the heat exchanger portion on the upper side from the cut portion 20 is formed to be bent on the rear surface side of the unit body 1 and is called a rear heat exchanger 5B. The heat exchanger part is formed by being bent at the front side of the unit body 1, so that the front side heat exchanger 5
Called A.

The rear-side heat exchanger 5B and the front-side heat exchanger 5A are connected by a first connecting portion 15 which is a connecting portion. The front-side heat exchanger 5A is further bent along the plurality of notches 21. That is, the upper side 21 a and the lower side 21 forming the notch 21
By being bent so as to be in contact with b, the heat exchanger portions above and below the notch 21 are bent inward.

Furthermore, due to the configuration of the cutout portion 21, the heat exchanger portions constituting the front-side heat exchanger 5A are characterized in that they are all bent at the same angle. In this state, the connecting portions 17 provided in the respective notches 21 are all folded in the same direction along the folds 18. Further, each second connecting portion 16 left between the front end of each notch 21 and the one side edge 12a connects the heat exchanger portions of the front side heat exchanger 5A.

In this manner, the heat exchanger 5 has an inverted V shape as a whole, and the front side heat exchanger 5A is connected to the other side edge 12b.
Is bent in multiple stages with the inside as the inside, while the rear heat exchanger 5B is straight without any curved portions,
And it is formed in a rectangular shape.

The front heat exchanger 5A and the rear heat exchanger 5B
Should be at least 2: 1. Preferably, the area of the front-side heat exchanger 5A is set to be larger than this ratio.

The vertical axis la passing through the first connection portion 15
, The angle θa between the vertical axis la and the front heat exchanger 5A is more acute than the angle θb between the vertical axis la and the rear heat exchanger 5B.

In other words, the inclination of the front-side heat exchanger 5A is steep, and the inclination of the rear-side heat exchanger 5B is formed to be gentle. End plates (not shown) are attached to both ends of the heat exchanger 5, and the heat exchangers 5 are provided at predetermined positions in the unit body 1 by the end plates. A front drain pan 6a is provided at a lower end of the front heat exchanger 5A, and a rear drain pan 6b is provided at a lower end of the rear heat exchanger 5B.

The drain pans 6a and 6b are communicated with each other through a communication passage (not shown), and the drain water collected by the rear drain pan 6b passes through the communication passage and the front drain pan 6a.
To flow to.

A cross flow fan 7, which is a blower fan constituting an indoor blower, is disposed on the rear side of the front heat exchanger 5A. The cross flow fan 7 is provided with a large number of blades (blades) 8 at predetermined intervals, and has a circular cross section as a whole.

As described above, as shown in FIG. 3, the blades 8 constituting the cross flow fan 7 are provided between the partition plates 9 provided at predetermined intervals in the axial direction. A so-called skew-type cross flow fan that is twisted so as to have an advancing angle in the axis rotation direction instead of a simple straight line is employed.

As shown in FIG. 1 again, the cross flow fan 7 thus configured is located on the back side of the front side heat exchanger 5A, and a part of the peripheral surface is surrounded by the front side heat exchanger. Be bent. That is, the front side heat exchanger 5A is
The part facing the central axis of the cross flow fan 7
Projects to the front and the upper and lower parts surround the front side of the cross flow fan 7
It is curved to the rear side to bend.

The distance between the back side edge of the front side heat exchanger 5A and the peripheral surface of the cross flow fan 7 is gradually approaching and gradually increasing, and the difference in the change is the same as that of the conventional one (for example, the actual open flat 4).
-14921).
Therefore, a stable wind flow from the suction side to the
To improve heat exchange efficiency.
Of course, it is possible to obtain a reduction in noise and an improvement in the blowing effect.

The upper portion of the cross flow fan 7 is opposed to a portion formed by bending the front heat exchanger 5A and the rear heat exchanger 5B in the inverted V-shape, and the cross flow fan 7 has an umbrella shape. Covered like

The first connecting portion 15 which is a connecting portion between the front side heat exchanger 5A and the rear side heat exchanger 5B is located at the front side of the axis O of the cross flow fan 7 by a distance l1.
It is arranged as a heat exchanger 5.

A fan casing 10 is provided from the lower part of the rear drain pan 6b to the outlet 4 through the side of the cross flow fan 7. Therefore, on the side surface of the rear drain pan 6b, a part of the casing 10 is extended and shared, and this part becomes a back nose.

On the other hand, the outer bottom surface of the front drain pan 6a also serves as a front nose of the cross flow fan 7 and has an outlet 4 opening at the lower front side of the unit body 1.
Also serves as the upper part of the outlet passage.

Then, for example, a cooling operation is performed. The compressor of the outdoor unit (not shown) is driven to perform the refrigeration cycle operation, and the cross flow fan 7 in the indoor unit is driven. The high-temperature and high-pressure refrigerant discharged from the compressor is condensed, decompressed, and then guided to the heat exchanger 5 as an evaporator.

The heat exchange air which is the air to be conditioned is introduced from the front suction port 2a and the upper suction port 2b, and is guided to the heat exchanger 5 through the filter. That is, from one side edge 12a of the front heat exchanger 5A and the rear heat exchanger 5B, the gap between the radiation fins 12 is conducted, and the radiation fins 1
After coming into contact with the heat exchange pipe 13 and the heat exchange pipe 13, it is led out from the other side edge 12b.

The refrigerant is guided to the heat exchanger 5, absorbs heat of evaporation while conducting through the heat exchange pipe 13, and
To heat. Heat exchange air is conducted between the radiating fins 12 to perform heat exchange.

The heat-exchanged air is cooled, and the temperature is reduced to cool air, which is led out of the front and rear heat exchangers 5A and 5B. Then, the air is blown from the air outlet 4 to the room to be air-conditioned through the cross flow fan 7 to perform a cooling operation.

In particular, since the heat exchanger 5 has an inverted V-shape between the front heat exchanger 5A and the rear heat exchanger 5B, the height of the unit body 1 as well as the heat exchanger 5 is small. Sorry
Contributes to a reduction in installation space.

Comparing the amount of heat exchange air passing through the front suction port 2a and the upper suction port 2b, the front suction port 2a has a larger air flow because of the area and position. On the other hand, comparing the heat exchange capacities of the front-side heat exchanger 5A and the rear-side heat exchanger 5B arranged to face the respective suction ports 2a and 2b, the mutual configuration and the heat exchange air guided to each are compared. The heat exchange capacity of the front-side heat exchanger 5A is large due to the difference from the amount.

Therefore, the amount of drain water generated during the cooling operation is large in the front heat exchanger 5A and small in the rear heat exchanger 5B. In the present invention, the inclination of the front-side heat exchanger 5A, which generates a large amount of drain water, is set steep, so that the generated drain water immediately flows down along the steep inclination, and is collected in the front drain pan 6a. Is done.

That is, from the setting of the inclination of the front-side heat exchanger 5A, there is a possibility that the inside of the unit main body 1 will be wet, or will be blown into the room to be air-conditioned by being blown by the cross flow fan 7 without falling down halfway. Nor.

In the rear-side heat exchanger 5B, of course, drain water is generated. However, the amount of drain water generated is small due to the amount of heat exchange air introduced here and the setting of the area. Therefore, even if the inclination of the rear-side heat exchanger 5B is gentle, the drain water does not fall on the way and is all collected in the rear drain pan 6b.

In this manner, a space for arranging the cross flow fan 7 can be secured between the front heat exchanger 5A and the rear heat exchanger 5B whose inclination angle is set so as to perform reliable drain water treatment. , Helps to reduce the height of the unit body 1.

Since the area ratio between the front heat exchanger 5A and the rear heat exchanger 5B is at least 2: 1,
A large amount of drain water is promoted in the front-side heat exchanger 5A having a large area. Preferably, if the area of the front-side heat exchanger 5A is set to be larger than this ratio, more remarkable effects can be obtained.

Since the front side heat exchanger 5A is bent at the same angle, the turbulence of the flow of the heat exchange air passing through the bent portion is further reduced. The front side heat exchanger 5A
Is formed so as to bend a part of the peripheral surface of the cross flow fan 7, so that the difference in the distance between the heat exchanger 5 and the cross flow fan 7 is extremely small in each part, and the suction pressure and the suction air volume of the heat exchange air are reduced. While maintaining a constant and reduced blow noise,
Heat exchange efficiency is improved.

Since the bent portion of the heat exchanger 5 is formed along the axial direction of the cross flow fan 7, the turbulence of the flow of the heat exchange air passing through the bent portion flows into the cross flow fan 7 in the same phase. .

On the other hand, the cross flow fan 7 is of a skew type in which the blades 8 have an advancing angle with respect to the axial rotation direction. The phase will be shifted.

Therefore, even if the turbulence of the flow of the heat exchange air is guided along the axial direction with respect to the cross flow fan 7, this phase shift disperses the generation of the fluid noise due to the turbulence of the flow of the heat exchange air, An operation that leads to the suppression of blast noise is performed, and quiet operation can be performed.

In the above-described embodiment, the front-side heat exchanger 5A is provided with a plurality of notches 21 in the radiating fins 12 so as to be bent. However, the present invention is not limited to this, and a plurality of notches are provided. Then, it may be bent at the same angle.

Further, the present invention is not limited to the structure of the above-described embodiment, and it is needless to say that various modifications can be made without departing from the scope of the present invention. Further, in the above-described embodiment, the front-side heat exchanger 5A and the rear-side heat exchanger 5B are formed by bending a single fin, but the front-side heat exchanger 5A and the rear-side heat exchanger 5B are individually formed. And may be arranged in an inverted V-shape.

[0062]

As described above, according to the present invention, there is provided a heat exchanger which has an inverted V-shape when viewed from the side and is a continuous body of a front heat exchanger and a rear heat exchanger. The connecting part between the front heat exchanger and the rear heat exchanger is on the front side of the center axis of the blower fan, the front heat exchanger has a steep inclination, and the rear heat exchanger has a gentle inclination. From the front heat exchanger, which has a large heat exchange capacity and generates a large amount of drain water, and a rear heat exchanger that has a small heat exchange capacity and generates a small amount of drain water. It is possible to improve the reliability by reliable processing and to obtain the effect of improving the heat exchange efficiency. And according to the present invention,
The front heat exchanger is located at the center of the blower fan
The part facing the shaft projects forward, and the upper and lower parts
Since it is curved to the rear side to surround the front side of the fan,
Creating a stable flow of air from the suction side to the outlet side
Not only can improve heat exchange efficiency, but also noise
The reduction and the improvement of the blowing effect can be obtained. And according to the present invention
If this is the case, the area ratio between the front heat exchanger and the rear heat exchanger is small.
At least 2: 1, preferably above this ratio
Since the area of the side heat exchanger has been increased, the large front area
A large amount of drain water can be promoted in the side heat exchanger,
Set the area of the front heat exchanger larger than this ratio
Then, a more remarkable effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an indoor unit of an air conditioner, showing one embodiment of the present invention.

FIG. 2A is a front view of a radiation fin according to the embodiment.
(B) is an enlarged view of a part of the radiation fin. (C)
FIG. 4 is a vertical cross-sectional view of a radiating fin connection portion.

FIG. 3 is a partial perspective view of the cross flow fan of the embodiment.

[Explanation of symbols]

12 radiating fins, 13 heat exchange pipe, 7 blower fan (lateral flow fan), 2a front inlet, 2b upper inlet, 4 outlet, 1 air conditioner body (unit body), 5 ... heat exchanger, 5A ... front side heat exchanger, 5B ...
Rear-side heat exchanger, 15... Connection part (first connection part).

Continuation of the front page (56) References JP-A-7-190403 (JP, A) JP-A-7-217987 (JP, A) JP-A-4-103512 (JP, U) JP-A-4-97220 (JP) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00 F24F 13/30

Claims (1)

(57) [Claims] 1. A heat exchanger in which a number of heat dissipating fins are arranged side by side with a small gap therebetween, and a heat exchange pipe having a heat exchange pipe penetrating the heat dissipating fins. In an air conditioner having a blower fan for guiding and performing a heat exchange action, an inlet is formed in a front part and an upper part thereof, an outlet is formed in a lower part of a front part, and the heat exchanger and An air conditioner main body in which the blower fan is housed and arranged, and the heat exchanger, which is an inverted V-shaped side view and is a continuous body of a front heat exchanger and a rear heat exchanger, is provided. The connecting portion between the front side heat exchanger and the rear side heat exchanger is located on the front side with respect to the center axis of the blower fan, and the front side heat exchanger has a steep inclination, and the rear side heat exchanger has The slope is formed gently, and the front side heat exchanger is located at the rear. The above blower
Protrude the part facing the center axis of the
Is curved on the rear side to surround the front side of the blower fan.
And the surfaces of the front heat exchanger and the rear heat exchanger.
The product ratio is at least 2: 1 and preferably this ratio
An air conditioner characterized in that the area of the front heat exchanger is larger than that of the air conditioner.