JPH07260181A - Air conditioner - Google Patents

Abstract

PURPOSE:To enable a positive drain water treatment to be carried out by a method wherein a connected part between an inverse V-shaped front side heat exchanger and a rear side heat exchanger is set to be more forward side than a central axis of the blowing fan, an inclination of the front side heat exchanger is set to be steep and an inclination of the rear side heat exchanger is set to be gradual. CONSTITUTION:An angle thetaa between a vertical axis line 1a passing through a first connecting part 15 between a front side heat exchanger 5A and a rear side heat exchanger 5B and the front side heat exchanger 5A is more acute than an angle thetab formed between the vertical axis line 1a and the rear side 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 gradual. Then, the lower end of the front side heat exchanger 5A is provided with a front side drain pan 6a and a lower end of the rear side heat exchanger 5B is provided with a rear drain pan 6b. With such an arrangement as above, this is constructed in such a degree as one corresponding to the amount of drain water of each of the heat exchangers 5A and 5B, resulting in that the drain water treatment can be positively carried out.

Description

Detailed Description of the Invention

[0001]

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

[0002]

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

From the user side, there is a great demand for miniaturization of these units and reduction of the installation space, and each maker must increase the heat exchange capacity while satisfying such conditions.

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

By the way, in the indoor unit, the air to be conditioned room is sucked into the main body of the unit, the heat exchanger is conducted to perform the heat exchange action, and the air after the heat exchange is blown again to the room to be conditioned. There is a fan, and due to its performance,
A transverse fan is adopted.

This cross-flow fan has an axial length substantially the same as the width dimension of the heat exchanger, and extends along the peripheral edges of both side end plates made of circular plates and partition plates having a predetermined interval.
A large number of blades (blades) are provided at a predetermined interval 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 the minimum dimension that secures the required air flow. In the case of the dogleg-shaped heat exchanger, a cross-flow fan is arranged on the rear side of the bent portion, but depending on the position setting of this bent portion, at least one of the upper end and the lower end of the heat exchanger is at one end. Since the part is far away from the cross flow fan, heat exchange air is difficult to be guided, and a difference occurs in heat exchange efficiency partially.

[0008]

Therefore, for example, Japanese Utility Model Laid-Open No. 14921/1992 is disclosed as an improved shape structure of the doglegged heat exchanger. With such a heat exchanger, rather than a simple doglegged heat exchanger,
The height dimension can be reduced and the heat exchange area and the amount of ventilation to the heat exchanger can be increased to improve the cooling capacity and the heating capacity.

However, in this type of heat exchanger, since the front side heat exchanger and the rear side heat exchanger are formed in a steep acute angle shape, the blower fan must be arranged below the heat exchanger. Therefore, the unit body is long in the vertical direction and becomes large in size.

Therefore, it is conceivable that the angles formed by the heat exchangers are widened to form a gentle inverted V shape, and a blower fan is arranged between these heat exchangers. The inclination angle is too small compared to the amount of drain water generated in the exchanger, drain water cannot flow down to the lower end of the heat exchanger, and falls in the middle to wet the inside of the unit body, This causes a problem that the blower fan blows the air into the air-conditioned room.

The present invention has been made in view of the above circumstances. An object of the present invention is to employ a heat exchanger having an inverted V-shape, and to improve the heat exchange capacity of the front heat exchanger. The drain water generation amount is set to a large value to increase the drain water generation amount, and the heat exchange capacity of the rear heat exchanger is set to a small value to reduce the drain water generation amount. The present invention intends to provide an air conditioner that can be subjected to various treatments to improve reliability and improve heat exchange efficiency.

[0012]

In order to satisfy the above object, in the air conditioner of the present invention, in claim 1, a large number of heat radiating fins are arranged in parallel with each other with a narrow gap therebetween. A heat exchanger having a heat exchange pipe penetrating through it, and a blower fan for guiding the air in the air-conditioned room to perform a heat exchange action in the heat exchanger. And an air outlet formed in the lower part of the front surface, and an air conditioner body in which the heat exchanger and the blower fan are housed and arranged are formed in an inverted V shape in a side view, and heat exchange is performed on the front surface side. A heat exchanger, which is a continuous body of a heat exchanger and a rear heat exchanger,
The front heat exchanger and the rear heat exchanger are connected to each other on the front side with respect to the central axis of the blower fan, the front heat exchanger is steeply inclined, and the rear heat exchanger is inclined. Are formed loosely.

In claim 2, the area ratio of the front side heat exchanger and the rear side heat exchanger according to claim 1 is at least 2:
The area of the front heat exchanger is preferably larger than this ratio.

[0014]

The connecting portion between the front side heat exchanger and the rear side heat exchanger having the inverted V shape is located on the front side with respect to the central 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 depends on the amount of drain water produced by each heat exchanger, and drain water treatment can be performed reliably and the blower fan Secure the space for placement.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 port 2a is opened on the front side of the grill, and a grill 3a is fitted therein. 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 fitted.

An outlet 4 is provided from the front surface of the unit main body 1 to the lower portion. An air filter (not shown) and a heat exchanger 5 molded as will be described later are provided so as to face the front portion, which is the upper portion of the blowout port 4, and the upper suction ports 2a and 2b.
Are placed.

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

The radiating fin 12 is preliminarily formed by press punching, and at a predetermined position of the upper portion A in the drawing, a V-shaped cut portion 20 is provided which is horizontal from one side edge 12a thereof and which is in the middle thereof. And is extended to the front 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 connecting portion 15. A plurality of notches 21 are provided at a predetermined interval from the notch 20 to the lower edge of the fin 12. The notch 21 has an upper side 21a.
And a lower side portion 21b, and each side portion is formed by bending at least a plurality of straight lines in different directions in a zigzag shape, and is bent and deformed as a whole to form a triangular shape.

The tip of the cutout portion 21 extends slightly to the front side of the one side edge 12a, and a second connection is made between the tip of the cutout portion 21 and the one side edge 12a of the heat radiation fin 12. It is left as part 16.

Further, a connecting portion 17 is integrally formed in the middle of the cutout portion 21. These connecting parts 17
Is an upper side portion 21a and a lower side portion 21b forming the cutout portion 21.
Is a narrow side part that connects the middle part of the
It is provided in a state of being inclined at a predetermined angle with respect to the inner and outer edges 12a and 12b.

Then, as shown in FIG. 3C, a substantially middle portion of the connecting portion 17 is formed in advance in a triangular shape in cross section so as to project in a predetermined plane direction, and folds are formed at the top portion and the base end portion. 18 is formed.

These folds 18 are provided so that when the heat radiation fin 12 is bent along the cutout portion 21 as will be described later, all the joint portions 17 themselves project in the same direction and are folded.

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

The rising slits 24 are rising pieces formed by cutting and raising integrally on both sides of the radiating fins 12 in the vertical direction, and are efficient for heat exchange air guided along both sides of the fins. You can contact them.

The radiation fin 12 molded in this way
A U-shaped bent heat exchange pipe 13, which is only shown in FIG. 1B, is penetrated through the pair of mounting holes 22 and is fitted to the heat radiation fin 12 by the pipe expanding means.

Then, U-bends (not shown) are connected to the open ends of the adjacent heat exchange pipes 12 to form a plate-shaped straight heat exchanger, and then the cut portion 20 and the cut portion 21 are formed.
Make a bending process for. Both are radiation fins 12
Each part is bent inward by applying a biasing force from one side edge 12a toward the other side edge 12b.

As shown in FIG. 1 again, the notch 2
By the bending process along 0, the heat exchanger is divided into two parts, which is formed by bending the cut portion from the upper portion to the lower portion side to form an acute angle.

Here, since the heat exchanger portion from the cut portion 20 to the upper side is bent and formed on the rear surface side of the unit main body 1, it is called a rear surface heat exchanger 5B, and the heat exchange from the cut portion 20 to the lower side is performed. From the place where the vessel part is bent and formed on the front side of the unit body 1, the front side heat exchanger 5
Call A.

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

In addition, because of the structure of the notch 21, the heat exchanger parts constituting the front side heat exchanger 5A are all bent at the same angle. In this state, all the joint portions 17 provided in each cutout portion 21 are projected and folded in the same direction along the fold line 18. Further, the respective second connecting portions 16 left between the tip of each notch portion 21 and the one side edge 12a connect the heat exchanger portions forming the front side heat exchanger 5A.

In this way, the heat exchanger 5 has an inverted V shape as a whole, and the front heat exchanger 5A has the other side edge 12b.
Is bent inward in a multi-step manner to form a curved shape, while the rear heat exchanger 5B has a straight shape without any curved portion,
And it is formed in a rectangular shape.

Front side heat exchanger 5A and rear side heat exchanger 5B
The area ratio between and must be at least 2: 1. Then, it is desirable to set the area of the front side heat exchanger 5A larger than this ratio.

The vertical axis la passing through the first connecting portion 15
The angle θa formed by the vertical axis la and the front side heat exchanger 5A with respect to the boundary is more acute than the angle θb formed by the vertical axis la and the rear side heat exchanger 5B.

In other words, the front side heat exchanger 5A has a steep inclination, and the rear side heat exchanger 5B has a gentle inclination. End plates (not shown) are attached to both ends of the heat exchanger 5, and the heat exchanger 5 is arranged at a predetermined position in the unit body 1 by the end plates. A front drain pan 6a is arranged at the lower end of the front heat exchanger 5A, and a rear drain pan 6b is arranged at the 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.
It is designed to flow to.

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

To explain further, as shown in FIG. 3, the vane plates 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, which is twisted so as to have an advancing angle in the axial rotation direction, rather than being simply linear, is adopted.

As shown in FIG. 1 again, the cross-flow fan 7 thus constructed is located on the back side of the front side heat exchanger 5A, and the front side heat exchanger partially surrounds the peripheral surface. Be bent.

The distance between the rear side edge of the front side heat exchanger 5A and the peripheral surface of the cross-flow fan 7 is gradually closer to each other and gradually separated from each other.
It is extremely small as compared with the technology of Japanese Patent No. 14921).

The upper part of the cross flow fan 7 faces the front side heat exchanger 5A and the rear side heat exchanger 5B which are bent and formed in the reverse V shape, and the cross flow fan 7 looks like an umbrella. It is 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 on the front side of the axial center 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 through the side of the cross flow fan 7 to the outlet 4. Therefore, a part of the casing 10 is extended and also serves as a side surface of the rear drain pan 6b, and this part serves as a back nose.

On the other hand, the outer bottom surface of the front drain pan 6a also serves as the front nose of the cross flow fan 7, and the outlet 4 which opens to the lower front side of the unit main body 1 is provided.
Also serves as the upper part of the outlet passage.

Therefore, for example, the 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, reduced in pressure, and then introduced into the heat exchanger 5 as an evaporator.

The heat exchange air, which is the air to be conditioned in the room, is introduced from the front suction port 2a and the upper suction port 2b and guided to the heat exchanger 5 through the filter. That is, the radiating fins 1 are connected to each other through the gaps between the radiating fins 12 from the one side edge 12a of the front heat exchanger 5A and the rear heat exchanger 5B.
After coming into contact with 2 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 and absorbs heat of vaporization while passing through the heat exchange pipe 13, so that the radiating fins 12
Transfer heat to. Heat exchange air is conducted between these radiating fins 12 to perform heat exchange.

The heat exchange air is cooled, and the temperature thereof is lowered to become cool air, which is led out from the front and rear surface side heat exchangers 5A and 5B. Then, it is blown out from the outlet 4 to the air-conditioned room via the cross flow fan 7 to perform a cooling operation.

Particularly, in the heat exchanger 5, the front side heat exchanger 5A and the rear side heat exchanger 5B form an inverted V shape, so that the height dimension of the heat exchanger 5 as well as the unit main body 1 is small. Sumi,
Contributes to the reduction of installation space.

Comparing the amounts 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 volume because of the area and the positional relationship. On the other hand, comparing the heat exchange capacities of the front side heat exchanger 5A and the rear side heat exchanger 5B, which are arranged so as to face the respective suction ports 2a and 2b, the respective configurations and the heat exchange air introduced to each of them are compared. Due to the difference from the amount, the heat exchange capacity of the front side heat exchanger 5A is large.

Therefore, the amount of drain water generated during the cooling operation is large in the front side heat exchanger 5A and small in the rear side heat exchanger 5B. In the present invention, since the inclination of the front side heat exchanger 5A that produces a large amount of drain water is set steep, the produced drain water immediately flows down along this steep slope and is collected in the front drain pan 6a. To be done.

That is, since the front side heat exchanger 5A is set to be inclined, there is a possibility that the unit main body 1 will not be dropped on the way, and the unit main body 1 will be wet or blown into the air-conditioned room by the blow of the cross flow fan 7. Nor.

Although the drain water is also generated in the rear heat exchanger 5B, the amount of drain water generated is small due to the amount of heat exchange air introduced here and the area settings. Therefore, even if the inclination of the rear surface side heat exchanger 5B is gentle, the drain water does not drop on the way, and all is collected in the rear drain pan 6b.

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

Since the area ratio of the front side heat exchanger 5A and the rear side heat exchanger 5B is set to at least 2: 1,
Generation of a large amount of drain water is promoted in the front side heat exchanger 5A having a large area. It is preferable to set the area of the front side heat exchanger 5A larger than this ratio to obtain a more remarkable effect.

Since the front side heat exchanger 5A is bent at the same angle, the turbulence of the flow of heat exchange air passing through this bent portion becomes smaller. Front side heat exchanger 5A
Since a part of the peripheral surface of the cross-flow fan 7 is bent to form a curved shape, the difference in the distance between the heat exchanger 5 and the cross-flow fan 7 becomes extremely small at each part, and the suction pressure and the suction air volume of the heat exchange air are reduced. It keeps constant and reduces the blowing noise,
Heat exchange efficiency is improved.

Further, 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 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 a skew type in which the blades 8 have an advancing angle with respect to the axial rotation direction, so that the flow of the individual inflows of the individual blades 8 against the turbulence of the flows flowing in the same phase. It will be out of phase.

Therefore, even if the turbulence of the flow of the heat exchange air is introduced along the axial direction with respect to the cross flow fan 7, this phase shift disperses the generation of fluid noise due to the turbulence of the flow of the heat exchange air, It has the effect of suppressing blast noise and enables quiet operation.

In the above embodiment, the front side heat exchanger 5A is provided with a plurality of cutouts 21 in the radiating fins 12 and is bent. However, the invention is not limited to this, and a plurality of cutouts are provided. Alternatively, they may be bent at the same angle.

Further, the present invention is not limited to the structure of the above embodiment, and it is needless to say that various modifications can be made within the scope of the present invention. Further, in the above 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. Then, it may be arranged in an inverted V shape.

[0062]

As described above, according to the present invention, the heat exchanger has an inverted V shape in a side view and is a continuous body of the front heat exchanger and the rear heat exchanger, The connecting part between the front heat exchanger and the rear heat exchanger is on the front side of the central axis of the blower fan, the front heat exchanger has a steep inclination, and the rear heat exchanger has a gentle inclination. Therefore, the front heat exchanger with a large heat exchange capacity and a large amount of drain water is adopted, and the rear heat exchanger with a small heat exchange capacity and a small amount of drain water is adopted. The reliability can be improved by reliable treatment, and the heat exchange efficiency can be improved.

[Brief description of drawings]

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

FIG. 2A is a front view of a radiation fin of the same embodiment.
FIG. 6B is an enlarged view of a part of the heat radiation fin. (C) is
FIG. 3 is a vertical cross-sectional view of a radiation fin joint portion.

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

[Explanation of symbols]

12 ... Radiating fins, 13 ... Heat exchange pipes, 7 ... Blower fan (cross flow fan), 2a ... Front inlet, 2b ... Upper inlet, 4 ... Outlet, 1 ... Air conditioner body (unit body), 5 ... Heat exchanger, 5A ... Front heat exchanger, 5B ...
Rear surface side heat exchanger, 15 ... Connection part (first connection part).

Claims (2)

[Claims] 1. A heat exchanger in which a large number of radiating fins are arranged side by side with a narrow gap between each other, and a heat exchange pipe is penetrated through these radiating fins; In an air conditioner equipped with a blower fan that conducts heat exchange, a suction port is formed in the front surface and the top surface of the air conditioner, and an air outlet is formed in the lower front surface, and the heat exchanger and The air conditioner main body in which the blower fan is housed and arranged, and the heat exchanger that has an inverted V shape in a side view and is a continuous body of a front heat exchanger and a rear heat exchanger are provided. The front heat exchanger and the rear heat exchanger are connected to each other on the front side with respect to the central axis of the blower fan, and the front heat exchanger is steeply inclined. An air conditioner characterized by having a gentle slope. 2. The area ratio of the front-side heat exchanger and the rear-side heat exchanger is at least 2: 1, and the area of the front-side heat exchanger is preferably larger than this ratio. The air conditioner according to claim 1.