JPS6231783Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner, and particularly to measures to prevent condensation near the outlet.

Conventionally, an air conditioner has been provided with a main body casing having an inlet and an outlet, a blower fan disposed on the inlet side in the main body casing, and a blower fan disposed on the outlet side (downstream side of the blower fan) in the main body casing. )
It is known that the air blower includes a heat exchanger disposed in the air blower, and the air sucked in from the suction port by the blowing fan is heat-exchanged with the heat exchanger and then blown out from the blow-off port.

However, in such an air conditioner, during cooling operation, when the cold air that has been heat exchanged in the heat exchanger hits the peripheral edge of the outlet of the main body casing and cools that area, it cools down due to the temperature difference with the indoor air. There was a problem in that dew condensation occurred on the outer surface of the peripheral edge of the outlet, resulting in water droplets falling.

Therefore, in order to solve this problem, for example, as shown in FIG. A bypass passage f directly facing the outer periphery of the outlet e is formed, and air that has not been heat exchanged in the heat exchanger c (air having the same temperature as indoor air) is passed from the outer periphery of the outlet e to the bypass passage f. to prevent the peripheral edge of the outlet e from being cooled by the cold air heat exchanged by the heat exchanger c (for example,
-Refer to Publication No. 125738, etc.) has been proposed and implemented.
In addition, g is an air filter disposed in the main body casing a facing the suction port h, and i is a blow-off grill attached to the blow-off port e.

However, this proposal has the disadvantage that the structure is complicated, the assembly work is time-consuming, and the cost is high because the bypass passage f must be formed within the main casing a. .

This invention was made in consideration of these points,
In particular, regarding the problem of condensation on the lower edge of the outlet of the main body casing, the heat exchange inside the main body casing can be solved without blowing out the air that has not been heat exchanged in the heat exchanger from the outer periphery of the outlet via the bypass passage. By making it difficult for the lower edge of the outlet to be cooled by the cold air heat-exchanged by the heat exchanger using the drain pan disposed at the bottom of the container, even with a simple structure, the outer surface of the lower edge of the outlet can be easily cooled. Prevents condensation from forming on the
The purpose is to prevent the occurrence of dripping.

For this purpose, the configuration of the present invention is such that a heat exchanger is disposed in a main body casing having an air outlet facing the air outlet, and a drain pan is provided below the heat exchanger in the main body casing. The end of the drain pan extends to the upper surface of the lower frame of the outlet, and a heat insulating layer is provided between the extending portion and the upper surface of the lower frame of the outlet. This prevents the cold air that has been heat exchanged by the heat exchanger through the extension of the drain pan from directly hitting the lower edge of the outlet, and
The heat insulating layer reduces the amount of heat transferred from the drain pan extension to the lower edge of the outlet, thereby preventing dew condensation from forming at the lower edge of the outlet.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

Figures 1 to 3 show a first embodiment in which the present invention is applied to a ceiling-suspended indoor unit of a heat pump type air conditioner. In the main body casing, a suction port 2 is provided at the center of the lower surface 1a of the main body casing 1, and air outlets 3, 3, 3 are provided at the front surface 1b and both left and right side surfaces 1c, 1c of the main body casing 1, respectively. is provided.

A mixed flow fan 4 is disposed in the center of the main body casing 1 so as to face the suction port 2 . The mixed flow fan 4 includes a drive motor 5 fixed to the upper surface 1d of the main body casing 1, and a plurality of blades 6a, 6a, . It is configured to suck air from the suction port 2 and feed it diagonally outward in three directions.

Further, the mixed flow fan 4 in the main body casing 1
On the downstream side, three heat exchangers 7, 7, 7 are arranged facing the blower ports 3, 3, 3, respectively. The refrigerant pipes 7a, 7a of the heat exchangers 7, 7 adjacent to each other are connected to each other to form a series of refrigerant pipes, and both ends of the refrigerant pipes (right side of the main body casing 1) are connected to each other to form a series of refrigerant pipes. Refrigerant pipes 7a, 7a of heat exchanger 7 facing outlet 3 of 1c
One end of each connecting pipe 9 having a flexible tube 9a in a part is connected to the rear side 1e side end of the main body casing 1, and the other end of the connecting pipe 9 is It passes through 1e and the wall w, is led out to the outside, and is connected to an outdoor unit (not shown).

Furthermore, a synthetic resin drain pan 10 with a concave cross section is disposed below the heat exchangers 7, 7, 7 in the main body casing 1 and extends in series along each heat exchanger 7. A heat insulating member 11 made of foamed polyethylene resin or the like is fixed to cover the outer surface of the drain pan 10 to prevent heat transfer from the heat exchanger 7 side to the lower surface 1c of the main body casing 1 via the drain pan 10. ing. The inner end of the drain pan 10 extends to the vicinity of the impeller 6 of the mixed flow fan 4,
A fan housing portion 12 is formed between the upper surface 1d of the main body casing 1 and the fan housing portion 12 that guides air from the mixed flow fan 4 to each heat exchanger 7 side. Further, the outer end portion of the drain pan 10 extends horizontally to the upper surface portion 14 of the lower frame portion 14d of each of the air outlets 3.
An extending portion 13 extending up to e is formed.

On the other hand, each of the air outlets 3 is equipped with an air outlet molding 14 made of synthetic resin, and
A plurality of (two in the figure) horizontal blades 15, 15 extending in the horizontal direction are rotatably supported on the outlet molding 14, and the horizontal blades 15, 15 are arranged at equal intervals in the vertical direction, By changing the direction of each of the horizontal blades 15, the direction of air blown out from the air outlet 3 can be adjusted up or down. A portion of the outlet molding 14 corresponding to the upper edge 3a of the outlet 3 has a screw fastening portion 14a fixed to the outer surface of the upper edge of the outlet 3 with a screw 16, and a heat exchanger inside the main body casing 1 from the outlet 3. The insertion part 14b is inserted to the vicinity of the upper end of the container 7, and the lower edge 3b of the outlet 3 of the outlet molding 14 is provided.
The corresponding portions include a fitting portion 14c that tightly fits into the lower edge 3b of the air outlet 3;
A lower frame part 14d projects outward from the upper end in parallel with the extension part 13 of the drain pan 10, and a space between the lower frame part 14d and the extension part 13 of the drain pan 10 is made of foamed polyethylene resin or the like. Heat insulation member 1
7 is fixed and interposed on the lower frame portion 14d.

In addition, 18 is a suction grill attached to the suction port 2,
19, the upper end is the insertion part 14 of the outlet molding 14;
b Vertical blades whose lower ends are rotatably supported by the drain pans 10 on the tip side (heat exchanger 7 side), and air is blown out from the outlet 3 by changing the direction of the vertical blades 19. The blowing direction can be changed and adjusted to the left or right. Also,
Reference numeral 20 designates an electrical parts box, 21 designates a terminal board for wiring at the installation site, and 22 designates side moldings made of synthetic resin mounted above each outlet 3 on the front surface 1b and both left and right side surfaces 1c, 1c of the main body casing 1.

Next, to explain the operation of the above embodiment,
During cooling operation of the air conditioner, air sucked into the main body casing 1 from the suction port 2 by the mixed flow fan 4 flows through the passage between the upper surface 1d of the main body casing 1 and the fan housing portion 12 of the drain pan 10. It is sent to the heat exchangers 7, 7, 7 arranged on three sides through the air, and after being heat exchanged in each heat exchanger 7, it is provided as cold air on the front surface 16 and both left and right side surfaces 1c, 1c of the main body casing 1. The air is blown out from each outlet 3, 3, 3 in three directions: forward and left and right sides.

At this time, the upper surface part 14e of the lower frame part 14d of each outlet 3 of the main body casing 1 has the outer end of the drain pan 10 extended and covered by the extended part 13, so that the heat exchanger The air heat exchanged in step 7, that is, the cold air, does not directly hit the lower edge 3b of the outlet 3.

Moreover, an outlet molding 14 is attached to the lower edge 3b of the outlet 3, and a heat insulating layer 17 is interposed between the lower frame 14d of the outlet molding 14 and the extending portion 13 of the drain pan 10. Since the cold air is connected to the drain pan 10 extension 13 and the lower edge 3b of the air outlet 3,
and the lower edge 3b of the outlet 3 of the main body casing 1 or the lower surface 1.
It never touches 0. Moreover, even when the drain pan 10 extension part 13 is cooled by cold air, the drain pan 10 is
From the extension part 13 to the outlet molding 14 and the outlet 3
The amount of heat transferred to the lower edge 3b is extremely small, and this is even more remarkable because the drain pan 10 and the outlet molding 14 themselves are made of synthetic resin, which has a lower thermal conductivity than metal. As a result of the above, since the lower edge 3b of the outlet 3 of the main body casing 1 and the outlet molding 14 attached to the lower edge 3b of the outlet 3 are almost never cooled by cold air, these parts There will be no condensation due to the temperature difference with the indoor air, and dripping can be reliably prevented.

Moreover, since the dew condensation prevention structure at the lower edge 3b of the air outlet 3 utilizes the existing drain pan 10 and air outlet molding 14, the number of parts is reduced and the structure itself is simple. , it is possible to improve assembly workability and reduce costs.

On the other hand, the upper edge 3a of each air outlet 3 of the main body casing 1 is covered with the insertion part 14b of the air outlet molding 14 on the inner side and covered with the side molding 22 on the outer side. Condensation does not occur on the upper edge 3a of each outlet 3. Moreover, the outlet molding 14 and the side molding 22
Since the molding itself is made of a synthetic resin with low thermal conductivity, even if the outlet molding 14 is cooled by cold air, the side molding 22 is hardly cooled by heat conduction from the outlet molding 14, and the Condensation does not form on the side molding 22.

It should be noted that the present invention is not limited to the first embodiment, but includes various other modifications. For example, in the second embodiment of the present invention shown in FIG. 4, in order to further reduce the amount of heat transferred from the outlet molding 23 to the lower edge 3b of the outlet 3, Fitting portion 23c of exit molding 23
are fitted with only a portion of them touching,
In addition, the fitting portion 23c is fixed by screws 24. Note that 23d is a lower frame portion.

Further, in the third embodiment shown in FIG. 5, the lower frame portion 14d of the outlet molding 14, 23 attached to the lower edge 3b of the outlet 3 as in the first and second embodiments,
Instead of interposing the heat insulating layer 17 between the drain pan 10 and the drain pan 10, the outlet molding 25
A heat insulating layer 26, 2 formed by a hollow part inside the lower frame part 25d of
6 to form a drain pan 10 of the outlet molding 25
The heat transfer area from the extending portion 13 side to the lower edge 3b side of the air outlet 3 is reduced, thereby allowing the air outlet molding 25 itself to fully exhibit its function as a heat insulating member.

Furthermore, in each of the above embodiments, the drain pan 10 is made of synthetic resin with low thermal conductivity in order to prevent the drain pan 10 itself from being cooled down by the cold air heat exchanged by the heat exchanger 7. Of course, metal ones may also be used.

Furthermore, in each of the embodiments described above, the present invention is applied to a ceiling-suspended indoor unit of a heat pump type air conditioner, but it goes without saying that it can be applied to various other types of air conditioners.

As explained above, according to the present invention, the end of the drain pan disposed on the lower side of the heat exchanger facing the outlet in the main body casing is extended to the upper surface of the lower frame of the outlet. Even with a simple structure in which a heat insulating layer is interposed between the outlet and the lower edge of the outlet, cooling of the lower edge of the outlet by the cold air heat exchanged in the heat exchanger is sufficiently suppressed. This makes it possible to reliably prevent the formation of dew condensation at the lower edge of the outlet due to the temperature difference with the indoor air, thereby making it possible to prevent dripping.

[Brief explanation of drawings]

1 to 5 show embodiments of the present invention, and FIGS. 1 to 3 show the first embodiment,
Figure 1 is a longitudinal side view of a ceiling-suspended indoor unit of a heat pump type air conditioner, Figure 2 is a plan view of the same as seen from below with the lower part of the main casing removed, and Figure 3 is the same as Figure 1. FIG. 4 is a view corresponding to FIG. 3 showing the second embodiment, and FIG. 5 is a view equivalent to FIG. 3 showing the third embodiment. FIG. 6 is a longitudinal sectional side view of a conventional air conditioner. 1... Main body casing, 3... Air outlet, 7...
Heat exchanger, 10... Drain pan, 13... Extension part, 14, 23, 25... Outlet molding, 14
d, 23d, 25d... lower frame, 14e... upper surface portion, 17, 26... heat insulation layer.

Claims (1)

[Scope of utility model registration request] A heat exchanger 7 is disposed in a main body casing 1 having an air outlet 3 facing the air outlet 3, and a drain pan 10 is arranged below the heat exchanger 7 in the main body casing 1. The end of the drain pan 10 extends to the upper surface 14e of the lower frame 14d of the outlet 3, and there is a space between the extending portion 13 and the upper surface 14e of the lower frame 14d of the outlet 3. An air conditioner characterized in that heat insulating layers 17 and 26 are provided.