JPH06221604A - Air-conditioner - Google Patents

Abstract

PURPOSE:To provide an air-conditioner capable of collecting water droplets dropping down right beneath from a heat exchanger provided obliquely and increasing an air volume with low resistance. CONSTITUTION:An air filter 11 is provided along the underface of a heat exchanger 3 provided in an oblique direction with respect to a top plate 1a of a casing 1, and water droplets dropping down onto the air filter 11 are caused to flow down in an oblique direction along the upper face of the air filter 11 so as to be led to a drain pan 5. The air filter 11 is made of fluororesin and has water-repellent properties. Dust may be deposited on the lower face of the air filter 11; however, since no dust is deposited on the upper face of the air filter 11, the water-repellent properties on the upper face of the air filter 11 is not deteriorated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner such as a ceiling-embedded type air conditioner in which heat exchangers are arranged diagonally to reduce the size in the height direction.

[0002]

2. Description of the Related Art Conventionally, as a ceiling-embedded air conditioner,
There is one as shown in FIG. 2 (for example, Japanese Patent Application Laid-Open No. 2-2
82632). In this air conditioner, a fan 2 is arranged in a rectangular parallelepiped casing 1, and a cross fin type heat exchanger 3 is arranged obliquely with respect to a top plate 1a, so that the dimension in the height direction of the whole is reduced. I'm making it small. Then, the water droplets dripping from the lower end of the heat exchanger 3 in the oblique direction are received by the first drain pan 5 having a gutter shape. Further, since the heat exchanger 3 has a large inclination with respect to the vertical line, the water droplets dropped from the central portion or the upper end portion of the heat exchanger 3 directly below the heat exchanger 3 are not heat-exchanged. The second drain pan 6 in the shape of a round window provided along the lower surface of the container 3 receives it. Further, an air filter 8 is provided above the suction grill 7 to collect dust and prevent the dust and the like from adhering to the heat exchanger 3. In addition, 9 is an outlet.

[0003]

However, in the above-described conventional air conditioner, the window-shaped second drain pan 6 is provided on the lower surface of the heat exchanger 3, that is, on substantially the entire upstream side of the heat exchanger 3. Therefore, there is a problem that the resistance is large and the air volume is reduced. If the rotation speed of the fan 2 is increased in order to prevent the decrease in the air volume, noise will increase.
Further, because of the second drain pan 6 in the shape of a rounded window on the upstream side of the heat exchanger 3, the amount of air passing through the heat exchanger 3 becomes non-uniform in each part, and the efficiency of the heat exchanger 3 decreases. There's a problem. In order to make up for this decrease in efficiency, the heat exchanger 3 must be upsized.

Therefore, an object of the present invention is to eliminate the second drain pan having the armored window shape and to make the air filter act as a drain pan, thereby reducing resistance, increasing air volume, and reducing noise. Moreover, it is an object of the present invention to provide an air conditioner in which the amount of air passing through each part of the heat exchanger can be made uniform, the efficiency of the heat exchanger can be improved, and the size of the heat exchanger can be reduced.

[0005]

In order to achieve the above object, the present invention provides a casing having a top plate and side plates.
In an air conditioner equipped with a fan, a heat exchanger inclined with respect to the top plate, and a drain pan for receiving water droplets dripping from the lower end of the heat exchanger, the air conditioner is located below the lower surface of the heat exchanger and It is characterized in that it is provided with an air filter that is inclined and receives water drops dripping from the heat exchanger and guides them to the drain pan.

At least the upper surface of the air filter is preferably water repellent.

A locking portion for removably locking the upper end of the air filter is provided on the side plate of the casing, and
It is desirable that a lower end portion of the air filter is provided with an engaging portion that is detachably engaged with the drain pan.

[0008]

According to the above construction, the air cleaned by collecting dust and the like by the air filter is heat-exchanged by the heat exchanger and further blown out around the fan.

Most of the water droplets condensed on the surface of the heat exchanger flow obliquely along the heat exchanger and are guided to the drain pan because the heat exchanger is inclined. Also, although some of the water droplets condensed on the surface of the heat exchanger are dropped directly below,
The dropped water drops hit the upper surface of the air filter, flow obliquely downward along the upper surface of the air filter, and are guided to the drain pan. Since the mesh of the air filter is naturally sized to collect dust, the water droplets dropped on the drain pan flow diagonally downward along the surface of the air filter without penetrating the air filter. The water drops become spherical due to the surface tension and flow obliquely downward along the surface of the air filter.

As described above, since the water drop dripping downward from the heat exchanger is received by the air filter and guided to the drain pan, the second drain pan having a window shape like that of the conventional example is unnecessary, and therefore, the upstream side of the heat exchanger. The resistance on the side is reduced, the air volume can be increased, the rotational speed of the fan can be reduced, and noise can be reduced.

Further, since the air filter allows the air to uniformly pass through substantially the entire surface, each part of the heat exchanger is different from that in the case of using the second drain pan having the round window shape of the conventional example. The amount of air passing through becomes uniform and therefore
The heat exchange efficiency of the heat exchanger is increased. Therefore, the heat exchange area of the heat exchanger can be reduced, and the entire air conditioner can be downsized.

Further, since the air filter also serves as a drain pan, a separate window-shaped drain pan having a complicated structure is not required, and the structure is simple and inexpensive.

When at least the upper surface of the air filter is made water-repellent, the water droplets dropped on the upper surface of the air filter are repelled by the air filter, and quickly flow obliquely downward and pass through the air filter. There is no fear of doing so.

In the case where the side plate of the casing is provided with a locking portion for removably locking the upper end of the air filter and the lower end of the air filter is provided with a locking portion for removably locking the drain pan. The air filter can be easily and easily attached or removed.

[0015]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

As shown in FIG. 1, this ceiling-embedded air conditioner has a rectangular parallelepiped casing 1 having a top plate 1a and side plates 1b, and a fan 2 and a cross in a direction oblique to the top plate 1a. A fin type heat exchanger 3 and a gutter-shaped drain pan 5 are arranged. The fan 2, the heat exchanger 3 and the drain pan 5 have exactly the same structure as the conventional example shown in FIG.

An air filter 11 is arranged diagonally along the lower surface of the heat exchanger 3. This air filter 1
1 is made of a fluororesin having water repellency. The upper end of the air filter 11 has an acute angle 12 and an obtuse angle 1 as locking portions fixed to the side plate 1b of the casing 1.
Inserted between 3 and. In addition, the air filter 11
An L-shaped member 14 serving as a locking portion is fixed to the lower end of the device, slightly closer to the center than the lower end thereof. The lower end of the air filter 11 and the L-shaped member 14 are locked to the upper edge of the drain pan 5.

Numeral 7 is a suction grill and numeral 9 is an outlet.

According to the above structure, the air sucked from the suction grill 7 reaches the lower surface of the air filter 11 by the rotation of the fan 2, and the dust contained in the air is collected on the lower surface of the air filter 11. . Then, the air passes through the air filter 11 and flows into each part of the heat exchanger 3. At this time, the air filter 11 has a smaller resistance than the conventional window-shaped drain pan 6 and has no variation in resistance, and therefore allows a large amount of air to pass uniformly. Therefore, the amount of air flowing through each part of the heat exchanger 3 does not become unbalanced, each part of the heat exchanger 3 uniformly performs the heat exchange action, and the efficiency of the heat exchanger 3 increases. In this way, the efficiency of the heat exchanger 3 is high, so that the heat exchanger 3 can be downsized. The air that has undergone heat exchange in the heat exchanger 3 passes around the fan 3 and is blown out from the air outlet 9.

Between the heat exchanger 3 and the suction grill 7, there is no second window-shaped drain pan 6 as in the conventional example, and only the air filter 11 is present, so the resistance is small and the fan is small. When the rotation speed of 2 is the same, the air volume increases. Therefore, when trying to obtain the same air volume, the rotational speed of the fan 2 can be reduced, and noise can be reduced.

Most of the water droplets condensed on the surface of the heat exchanger 3 flow obliquely downward along the inclined heat exchanger 3 and are introduced into the drain pan 5. Further, some of the water droplets condensed on the surface of the heat exchanger 3 fall directly below. The dropped water drops hit the upper surface of the air filter 11, flow downward along the inclined upper surface of the air filter 11, and are guided into the drain pan 5. The mesh of the air filter 11 has a size small enough to collect dust, and since the air filter 11 is made of a fluororesin having water repellency, water droplets dropped on the air filter 11 are Without penetrating through the air filter 11, the air quickly flows obliquely downward along the upper surface of the air filter 11. The water droplet becomes spherical due to the surface tension and flows on the upper surface of the air filter 11.

Since dust is attached to the lower surface of the air filter 11 but almost no dust is attached to the upper surface, the water repellency of the air filter 11 against the water flowing on the upper surface of the air filter 11 is impaired. It will not be done. Moreover, since dust is not attached to the upper surface of the air filter 11, the flow of water along the upper surface of the air filter 11 is not hindered. Therefore, the water that has dropped onto the upper surface of the air filter 11 does not penetrate through the air filter 11 and quickly flows obliquely downward along the upper surface of the air filter 11. Therefore, the resistance to the air passing through the air filter 11 is reduced.

When the air filter 11 is mounted, the suction grill 7 is removed, the upper end of the air filter 11 is inserted between the angle 12 and the angle 13, and the lower end of the air filter 11 and the L-shaped member 14 are inserted. Is locked to the upper edge of the drain pan 5. When removing the air filter 11, the L-shaped member 14 is pushed up, and then the upper end portion of the air filter 11 is pulled out from between the angles 12 and 13. In this way, the air filter 11 can be easily attached or detached. The L-shaped member 1
4 also serves as a handle.

Since the air filter 11 also serves as a drain pan, a drain pan having a complicated structure is not required separately, and the structure is simple and inexpensive.

In the above embodiment, the air filter 11 is provided substantially parallel to the heat exchanger 3. However, the inclination of the air filter may be different from the inclination of the heat exchanger.

Further, in the above embodiment, the air filter 11
In order to impart water repellency to the air filter 11, the air filter 11 is formed of a fluororesin. However, a silicone water repellent, a fluorine water repellent, a paraffin water repellent, or another water repellent is provided on the upper surface of a resin such as plastic. You may apply.

[0027]

As is apparent from the above, the air conditioner according to the first aspect of the present invention is a water drop dripping from the heat exchanger below the lower surface of the heat exchanger inclined with respect to the top plate of the casing. Since the inclined air filter that guides the drain pan to the drain pan is arranged, the second drain pan having a round window like the conventional example is unnecessary, the resistance is reduced, and the air flow can be increased, and the fan rotation is reduced. The number can be reduced to reduce noise. In addition, the air filter does not cause an imbalance in the amount of air passing through each part as compared with the second drain pan having the round window shape, so that the amount of air passing through each part of the heat exchanger should be uniform. As a result, the efficiency of the heat exchanger can be increased, and the heat exchanger can be downsized. Further, since the air filter serves as the second drain pan, the structure is simple and the manufacturing cost is low.

Further, the air conditioner of the invention of claim 2 is the air conditioner of claim 1, wherein at least the upper surface of the air filter is provided with water repellency, so that the water drops falling on the upper surface of the air filter are repelled. In addition, it is possible to completely prevent the water droplets from passing through the air filter, and it is possible to cause the water droplets to quickly flow obliquely downward.

The air conditioner according to a third aspect of the present invention is the air conditioner according to the first or second aspect, in which a side wall of the casing is provided with a locking portion for removably locking the upper end of the air filter. Since a locking portion that is detachably locked to the drain pan is provided at the lower end of the air filter,
The air filter can be easily installed or removed.

[Brief description of drawings]

FIG. 1 is a sectional view of a ceiling-embedded air conditioner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a conventional ceiling-embedded air conditioner.

[Explanation of symbols]

1 ... Casing, 1a ... Top plate, 1b ... Side plate, 2 ... Fan,
3 ... Heat exchanger, 5 ... Drain pan, 11 ... Air filter.

Claims (3)

[Claims] 1. A fan (2), a heat exchanger (3) inclined with respect to the top plate (1a), and a fan (2) in a casing (1) having a top plate (1a) and side plates (1b). An air conditioner equipped with a drain pan (5) for receiving water drops dripping from the lower end of the heat exchanger (3), wherein the heat exchanger (3) is positioned below the lower surface of the heat exchanger (3) and is inclined. An air conditioner comprising an air filter (11) that receives water drops dripping from (3) and guides it to the drain pan (5). 2. The air conditioner according to claim 1, wherein at least an upper surface of the air filter (11) has water repellency. 3. The side plate (1b) of the casing (1) is provided with locking portions (12, 13) for removably locking the upper end portion of the air filter (11), and the air filter (1).
The air conditioner according to claim 1 or 2, wherein a locking portion (14) for removably locking the drain pan (5) is provided at a lower end portion of (1).