JPH11101466A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which allows an additional member for preventing vapor condensation in the lower surface side of drain channels at the time of a cooling operation to be unnecessary. SOLUTION: There are provided an air inlet 3, air outlet 4, fan 12, heat exchanger 13, and drain pan 15 which is disposed downward of this heat exchanger 13 to form drain channels 16 to 18 which receive the drain water from the heat exchanger 13 in the top surface side, and which has the lower surface side that becomes the upper wall 15B of the air outlet 4. A thick part 24A, which fills between the bottom surface of the drain channels and the upper wall of the air outlet, and a hollow part 25B, which extends over the lengthwise direction of the drain pan 15 in this thick part 24A, are formed in this drain pan 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a blower inside,
The present invention relates to an air conditioner that has a heat exchanger through which a refrigerant flows, and blows cold or hot air that has undergone heat exchange into a room. In particular, it relates to an improvement in a dew pan (drain pan) that receives dew generated in the heat exchanger during cooling. .

[0002]

2. Description of the Related Art First, the structure of an air conditioner (indoor unit) to which the present invention is applied will be described with reference to FIGS.

The indoor unit 1 is horizontally long, and its main body case 2 is made of a synthetic resin and is divided into two front and rear grill cases 2.
A and a rear case 2B. Then, as shown in FIG. 7, a suction port 3 is formed from the upper surface portion to the front surface portion of the grill case 2A, and a diagonally downward blow outlet 4 is formed on the lower surface portion.

[0004] A suction port panel 5 is mounted so as to cover the suction port 3 in the front part. When the suction port panel 5 is opened, the side of the air filter 6 or the grill case 2A which is detachable from the suction port 3 is provided. An operation display section 7 and the like arranged in the section appear, so that replacement of the filter 6 and control adjustment can be performed.

[0005] An air passage 11 is formed inside the indoor unit 1 so as to communicate the suction port 3 and the air outlet 4 provided on the front side, and the indoor air is sucked and blown into the air passage 11. A cross flow fan 12 as a blower is provided, and a heat exchanger 13 is provided upstream of the cross flow fan 12, that is, on the suction port 3 side.

The heat exchanger 13 has a cross section covering both the suction ports 3 so that the suction air from the suction port 3 on the upper surface and the suction air from the suction port 3 on the front part can be heat-exchanged without waste. Are bent in a substantially rectangular shape. The structure is composed of a large number of aluminum heat exchange fins juxtaposed side by side with a small gap therebetween and a refrigerant pipe penetrating perpendicularly to these heat exchange fins so as to meander up and down. The refrigerant supplied from the outdoor unit separated from the indoor unit to the refrigerant pipe via the refrigerant pipe flows through the refrigerant pipe.

During the cooling or heating operation, the air sucked by the rotation of the cross flow fan 12 passes through the heat exchanger 13 to be turned into a cool air or a warm air, and changes the air direction provided at the outlet 4 to the left or right. The wind direction can be blown out in an arbitrary direction by the plate 14 or the like.

Here, during the cooling operation, since the air passing through the heat exchanger 13 is cooled, water vapor contained in the air is condensed and adheres to the heat exchanger 13 as dew d.

The dew d adhering to the heat exchanger 13 travels along fins and the like of the heat exchanger 13 and collects at a lower portion thereof. The dew d is received by a dew tray 15 disposed below the heat exchanger 13 and is then drained by a drain hose or the like. It is discharged outside.

The above-mentioned dew receiving tray 15 is formed of resin, and a plurality of drain water passages 16, 17, 18 are formed in a longitudinal direction on an upper surface side. Also, due to its lower surface 15B,
The air passage 11 and the outlet 4 and the like are also formed as one member formed by an arc-shaped wall portion 19 formed inside the main body, and also serve as the upper wall of the outlet 4. Each drain channel 1
6, 17, and 18 are defined by ribs 20.

At the rear end of the dew tray 15, that is, on the side of the blower 12, air blown from the blower 12 is supplied to the outlet 4.
Is formed. This tongue 21
The drain water channel 18 side is formed in a planar shape, but the blower 12 side is formed along the outer periphery of the blower 12 and is formed into a curved shape toward the air outlet 4, so that the base side is thicker in appearance. Has become.

Here, if the tongue portion 21 is formed so as to be entirely filled with resin, when the resin cools during molding,
Because of the thickness, unevenness is caused in the cooling method, and warpage occurs. Therefore, a hollow portion 21B is formed in the tongue-shaped portion 21 in order to keep the thickness constant. This hollow portion 21B is
It is formed by injecting nitrogen gas or the like from a gas inlet (not shown) by well-known gas injection molding.

On the other hand, on the front side of the dew receiving tray 15, drain water channels 16, 17 on the upper surface side and a lower surface portion 15 serving as an upper wall of the outlet 4 are provided.
A wedge-shaped space is formed between B. Into the wedge-shaped space, a step heating material 22 made of styrene foam or the like having the same shape is attached by post-installation with an adhesive or the like.

[0014]

The reason why the step heating material 22 is retrofitted is that the cooled drain water stagnates in the drain water channels 16 to 18 so that the outside air that has entered the case contacts the lower surface 15A. This is to prevent problems such as the accumulation of dew in the case and the drip from the case to the outside to wet the room.

However, retrofitting the step heating material 22 as described above increases the number of parts and the number of manufacturing steps, resulting in an increase in cost.

Accordingly, the present invention has been made to solve such a problem, and an air conditioner which can eliminate the need for a retrofitting member for preventing dew condensation on the lower side of the drain passage during cooling operation. The purpose is to provide.

[0017]

In order to achieve the above object, the present invention provides a suction port provided on the front side of a main body case, an air outlet for blowing air sucked from the suction port,
A blower disposed in an air passage communicating the suction port and the air outlet, a heat exchanger disposed in the air passage and exchanging heat with indoor air sucked from the suction port by the blower, A drain tray is disposed below the heat exchanger and receives drain water from the heat exchanger on the upper surface side, and a dew tray serving as an upper wall of the outlet on the lower surface side is provided. It is characterized in that a thick part filling the space between the bottom of the drain channel and the upper wall of the outlet and a hollow part extending in the longitudinal direction of the exposure tray are formed in the thick part.

Further, the dew tray has a tongue-like portion having a hollow portion formed therein at the rear end thereof for guiding air blown from the blower to an air outlet, and having a hollow portion formed therein. A passage communicating with the thick hollow portion is provided at a central portion in the longitudinal direction of the tongue-shaped portion.

Further, a bulging part which forms a part of the passage is provided on the bottom of the drain water channel, and a detour which bypasses the bulging part is formed in the drain water channel.

Further, the above-mentioned dew receiving tray is formed by resin molding,
The hollow portion is formed by gas injection molding.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing an embodiment of an indoor unit according to the present invention, FIG. 2 is a top view of the dew tray viewed from directly above, FIG. 3 is a front view of the dew tray, and FIG. AA of 2
FIG. 5 is a cross-sectional view of FIG. In each figure, the same reference numerals as those in FIGS. 6 and 7 indicate the same or corresponding parts, and only the structure of the dew tray is different from the conventional one.

The dew tray 15 of the present embodiment is also integrally formed of a synthetic resin, although the molding die is different, so that the heat exchanger 1 can receive drain water (dew) d dropped from the heat exchanger 13.
3, it extends so as to face almost the entire width of the heat exchanger 13 (length in the left-right direction) and is inclined and installed so as to fall forward as a whole.

A plurality of drain passages 16, 17, 18 running in the left-right direction are formed side by side inside the dew tray 15.

The rear drain channel 18 is inclined in accordance with the inclined installation of the dew tray 15, and the front drain channel 1 is inclined.
Drain water from the drain pipes 6 and 17 is collected through communication water passages 23 (see FIG. 2) at both ends communicating the drain water paths 16 to 18.

At the front side of the drain water channel 18, a first flow path is completely divided by a rib 20 directly below the heat exchanger 13 so as to face the heat exchange portion 13 A of the vertical portion of the heat exchanger 13. Drain channel 16 and second drain channel 17
Are formed extending in the left-right direction.

Here, the bottom surface of the front first drain passage 16 and the bottom surface of the second drain passage 17 are gradually lowered left and right with the substantially central portion P as the apex, as shown by the broken line in FIG. The sloping surfaces 16S and 17S are formed.

In the case of such a drain channel having a bottom surface having a downward slope, the drain water dropped from the heat exchanger 13 and dropped into the first drain channel 16 and the second drain channel 17 is discharged from each of the drain channels. Without flowing into the drain water passages 16 and 17, the water flows smoothly to the left or right, and flows through the above-mentioned communication water outlet 23 to the third drain water passage 18 behind.
The water is collected.

Since the bottom of the third drain passage 18 at the rear where the drain water gathers is inclined forward, even if a small amount of dew drops on the drain passage 18, the third drain passage 18 is located on the front side. A sufficient amount of drain water is accumulated, and the accumulated water is naturally drained from the drain port 24, 24 provided in the left and right communication water supply ports 23 in FIG. 2 to which the drain hose is attached. Become so.

On the other hand, a molding die is formed between the bottom surfaces of the first and second drain water passages 16 and 17 on the front side of the dew tray 15 and the upper wall 15B of the outlet to form a thick portion 25A. A hollow portion 25B extending in the longitudinal direction of the exposure tray 15 is formed in the thick portion 25A by gas injection molding.

By forming the hollow portion 25B in the thick portion 25A on the front side of the dew receiving tray 15, outside air does not come into contact with the back side of the drain water passages 16 to 18 and dew does not form. The dew does not accumulate on the floor, leaks from the gap of the case to the side of the air outlet 4, and is not blown off by the blown air or dripped and the floor surface is not wetted. In addition, since a retrofitting member for preventing dew condensation as in the related art is not required, the number of components and the number of manufacturing steps do not increase, and cost can be reduced.

The thick portion 25A and the tongue portion 21
In the center of the dew tray 15 in the longitudinal direction between the hollow portions 21B, as shown in FIGS. 2, 4, and 5, a bulging portion 26 protruding so as to cross the bottom surface of the third drain water channel 18 therebetween. Are formed. The bulging portion 26 serves as a gas passage 27 that communicates the tongue portion 21 and the hollow portions 21B and 25B formed in the thick portion 25A during gas injection molding.

Further, at the rear end (tongue-like portion 21) of the dew tray at the center in the longitudinal direction of the dew tray 15, the air outlet 4 and the wind direction plate 1 are provided.
A rod 28 extending toward the rear wall of the outlet 4 is integrally formed so as to divide the outlet 4 into two parts. Then, as shown in FIG. 4, a gas injection port 28A for gas injection molding is formed on the upper side of the rod 28. The nitrogen gas injected from the gas inlet 28A is press-fitted into the tongue portion 21 located above the gas inlet 28A, forming a hollow portion 21B therein and forming the hollow portion 21B so as to cross the central portion of the third drain passage 18. A gas passage 27 is formed in the bulged portion 26 and reaches the thick portion 25A on the front side of the exposure pan, from which gas is distributed on both left and right sides on average, and a hollow portion 25B is formed over the entire width in the longitudinal direction. .

Further, in the present embodiment, in order to prevent the drain water flowing through the third drain passage 18 from being blocked by the bulging portion 26, a bypass 18A that bypasses the front end of the bulging portion 26 is provided. Are formed. This allows
Even when the amount of drain water flowing through the third drain passage 18 is small, the drain water flows smoothly and drain water is discharged from a drain hose attached to one of the left and right drain ports 24 of the dew tray 15.

Further, the hollow portion 25B also has a heat insulating effect, and the third portion in which drain water is most likely to accumulate and be cooled.
Between the drain channel 18 and the front end face of the dew tray 15 and the front end face of the outlet upper wall 15B, which are easily exposed to the outside air, to reduce the thermal conductivity between them. Can be prevented.

In the above-described embodiment, the first and second drain channels 16 and 17 are provided with a gradient having the central portion as the apex. However, even if they are flat, the intended purpose of the present invention can be achieved. If the drainage water is drained slowly if it is flat, the thickness of the dew tray 15 in the longitudinal direction becomes uniform, so that the hollow portion 25B formed by gas injection molding is easily formed.

[0037]

As described above, according to the present invention, the dew tray has a thick portion buried between the bottom of the drain channel and the upper wall of the outlet, and a hollow extending in the lengthwise direction of the dew tray in the thick portion. Since the outside air does not touch the back side of the drain channel and there is no dew, the dew collects in the case, leaks to the outlet side from the gap of the case, and is blown by the blowing wind, The floor surface does not get wet by dripping. In addition, since a retrofitting member for preventing dew condensation as in the related art is not required, the number of components and the number of manufacturing steps do not increase, and cost can be reduced.

Further, the dew tray has a tongue-shaped portion having a hollow portion formed therein at the rear end thereof for guiding the air blown from the blower to the air outlet, and having a hollow portion formed therein. Since the passage communicating with the hollow part of the thick part is provided at the central part in the longitudinal direction of the tongue part, when forming the hollow part in the tongue part by gas injection molding as in the past, at the same time,
The injected gas reaches the thick part on the front side through the above passage,
A hollow part is formed in the thick part. In addition, since the injected gas flows so as to spread from the center to both the left and right sides, it is possible to form the gas so that the gas spreads equally on the left and right sides.

Further, a bulging portion forming a part of the passage is provided on the bottom of the drain channel, and a detour is formed in the drain channel to bypass the bulging portion. The drain water can be smoothly discharged through the detour even if the water is blocked.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of an indoor unit according to the present invention.

FIG. 2 is a top view of the dew tray of FIG. 1;

FIG. 3 is a front view of the dew tray of FIG. 1;

FIG. 4 is a sectional view taken along the line AA of FIG. 2;

FIG. 5 is a sectional view taken along the line BB of FIG. 2;

FIG. 6 is a perspective view showing an example of an indoor unit.

FIG. 7 is a side sectional view showing a conventional example of an indoor unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Main body case 3 Inlet 4 Outlet 11 Air path 12 Cross flow fan 13 Heat exchanger 15 Dew tray 15B Lower face of dew tray (upper outlet wall) 16, 17, 18 Drain channel 18A Detour 21 Tongue Part 25A Thick part 21B, 25B Hollow part 26 Swelling part 28 Rod 28A Gas inlet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Kawanabe 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Harutaka Genno 2 Keihanhondori, Moriguchi-shi, Osaka 5-5-5 Sanyo Electric Co., Ltd. (72) Inventor Michihisa Kurita 2-5-5 Sanyo Electric Co., Ltd. Sanyo Electric Co., Ltd. (72) Inventor Toshio Sekine Keihan, Moriguchi, Osaka 2-5-5 Hondori Sanyo Electric Co., Ltd.

Claims (4)

[Claims] An inlet provided on a front side of a main body case;
An outlet for blowing out the air sucked from the inlet, a blower disposed in an air passage communicating the inlet and the outlet, and a blower disposed in the air passage and from the inlet by the blower. A heat exchanger for exchanging heat with the sucked room air, and a drain channel arranged below the heat exchanger and receiving drain water from the heat exchanger on an upper surface side, and a lower surface side above the outlet. A dew pan serving as a wall, wherein the dew pan has a thick portion filling the gap between the drain channel bottom surface and the upper wall of the outlet, and a hollow portion extending in a longitudinal direction of the dew tray in the thick portion. An air conditioner characterized by: 2. The dew tray has a tongue having a tongue having a hollow portion formed therein at the rear end side for guiding air blown from a blower to an air outlet, and a hollow portion formed inside the tongue portion. 2. The air conditioner according to claim 1, wherein a passage communicating with the hollow part of the thick part is provided at a central part in a longitudinal direction of the tongue part. 3. The air according to claim 2, wherein a bulging portion that forms a part of the passage is provided on the bottom of the drain channel, and a bypass that bypasses the bulging portion is formed in the drain channel. Harmony machine. 4. The air conditioner according to claim 1, wherein the dew tray is formed by resin molding, and the hollow portion is formed by gas injection molding.