JPS5912530Y2 - Air conditioner outdoor unit - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an outdoor unit of an air conditioner that improves drainage performance during winter defrosting.

Conventionally, as shown in FIGS. 1 and 2, an outdoor unit of an air conditioner has a heat exchanger installed in a housing 2 having an inlet 1 and an outlet (not shown), and facing the inlet 1. 3, a blower 4 is disposed opposite to the top cover of the housing 2, and further,
A rising portion 6 is formed on the periphery of the bottom plate 5 constituting the housing 2 in order to protect the lower end of the heat exchanger 3 and to reinforce the bottom plate 5.

Then, when this air conditioner is operated in heating operation, if frost formation is detected on the heat exchanger 3, it switches to defrosting operation and thaws the frost, and the water generated at this time or rainwater etc. In order to discharge water, a drain port 7 is provided on the bottom plate 5 facing the lower end surface of the heat exchanger 3, thereby draining the water.

Note that 8 is a compressor. The above describes the case where a U-shaped heat exchanger is used as the heat exchanger 3. The same is true even when the L-shaped container 3 is used.

However, this drain port 7 cannot have a large opening area, and as a result, it is prone to freezing as the outside temperature drops, resulting in a decrease in the amount of water discharged, and when operating for a long time, the entire bottom plate 5 freezes, resulting in heat generation. The lower part of the exchanger 3 also freezes, resulting in a decrease in heating capacity and the heat exchanger 3 being deformed and damaged.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to raise the central part of the bottom plate close to the height of the lower edge of the heat exchanger, or to slope it toward the periphery. In addition to shaping the surface, a plurality of drainage holes are provided on this slope, and the drainage D! The above-mentioned drawbacks have been solved by arranging the drains to face the lower end of the heat exchanger, and by making the peripheral edges of the drains other than the lowest one higher than the bottom plate surface. To provide an outdoor unit of an air conditioner that does not freeze and damage a heat exchanger.

An embodiment of the present invention will be described below with reference to FIG.

11 is a bottom plate, and this bottom plate 11 connects a central part 12 to a heat exchanger 1.
It is raised and shaped close to the height of the lower edge of 3, and the peripheral edge 1
4, and a rising portion 15 is formed at the peripheral edge.

Then, a first drain port 15, a second drain port 16, and a third drain port 17 are provided from the center portion 12 toward the peripheral edge 14, and the third drain port 17 is located below the heat exchanger 13. It is provided so as to face the end surface.

As mentioned above, this bottom plate 11 extends from the central portion 12 to the peripheral edge 14.
The third drainage port 17 has a downward slope towards the
The space between the drain port 17 and the peripheral edge 14 is sloped in the opposite direction, so that the opening of the third drain port 17 is at the lowest position.

Furthermore, the first and second drain ports 15 other than the outermost third drain port 17. The periphery of the opening 16 is the bottom plate 1
It is made a little higher than the first side, and the bank parts 15a and 16a are made to look impressive.

Now, when this air conditioner is operated for heating in winter, heat exchanger 1
Refrigerant flows through 3, and heat exchange takes place with the outside air.
As this heating operation continues, frost adheres to the heat exchanger 13.

As this frosting progresses, the heat exchange efficiency decreases, so the operation is switched to defrosting operation using an unillustrated method.

When switching to this defrosting operation, the high temperature refrigerant flows through the heat exchanger 13 to defrost it, and the adhering frost becomes water droplets and drips onto the bottom plate 11.

The water then flows to the lower part of the bottom plate 11 having an inclined surface, and is discharged from the third drain port 17 to the outside of the machine.

However, if the outside air temperature is extremely low, the water droplets will freeze while passing through this third outlet 17, reducing the amount of drainage, and eventually the entire opening will freeze, and water will no longer be drained from here. .

For this reason, water accumulates near the third drain port 17 of the bottom plate 11, and the water level gradually rises, but when this water exceeds the bank portion 16a around the second drain port 16, the second drain port 16
The waste is ejected from the aircraft.

Similarly, even if the second drain port 16 freezes, the water is discharged from the first drain port 15, so the lower part of the heat exchanger 13 will not be submerged in water and will not freeze, thus reducing the heating capacity. It won't happen.

In the above description, the number of drainage ports provided radially from the center portion 12 of the bottom plate 11 toward the peripheral edge 14 is 3.
However, the present invention is not limited to this, and any number of drain ports may be provided as long as the drain ports at the bottom face the lower end surface of the heat exchanger 13.

Also, this bottom drain port (in this case, the third drain port 1
The reason why the banks 15a and 16a are provided around the openings of the drains other than 7) (in this case, the first and second drains 15 and 16) is because normally only the third drain 17 is drained. It is intended to make people do the following.

In addition, although the case where a U-shaped heat exchanger 13 is used as the heat exchanger 13 has been described above, an L-shaped heat exchanger 13 is used.
The same applies to the case of using , as shown in FIG.

The L-shaped heat exchanger 13 may be interpreted as a U-shaped heat exchanger divided into two, and in this case, the central portion 12 may be regarded as the periphery of the casing on the outlet side.

As described above, according to the present invention, the central part of the bottom plate is raised and shaped close to the height of the lower edge of the heat exchanger, an inclined surface is formed toward the periphery, and there are multiple The lowest drain port faces the lower end surface of the heat exchanger, and the peripheral edges of the drain ports other than the lowest drain port are raised higher than the bottom plate surface, so the heat exchanger It is possible to maintain a large gap between the lower end surface and the opposing bottom plate surface around the lowest drain port, and even if this lowest drain port freezes due to a drop in outside air temperature during heating and defrosting, heat exchange is possible. The lower end of the heat exchanger does not get wet with defrosting water, and the defrosting water is drained from the upper drainage port provided on the slope of the bottom plate, so the lower end of the heat exchanger does not freeze and the heating capacity decreases. This has the effect of preventing deformation and damage of the heat exchanger due to freezing.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a schematic structure of an outdoor unit of an air conditioner according to a conventional example, Fig. 2 is a vertical cross-sectional view taken along line A-A in Fig. FIG. 4 is a plan view showing a schematic structure of an embodiment of the present invention, FIG. 4 is a vertical sectional view taken along line B-B in FIG. 3, and FIG. FIG. 6 is a longitudinal sectional view corresponding to FIG. 4, showing the main parts of another embodiment of the present invention. 5, 11... Bottom plate, 3, 13... Heat exchanger, 15,
16, 17...Drainage port.

Claims (1)

[Scope of utility model registration request] A bottom plate comprising the casing, comprising a casing having an inlet and an outlet, a heat exchanger provided opposite to the inlet, and a blower provided opposite to the outlet. In the outdoor unit of the air conditioner, the center part of the bottom plate is raised up close to the height of the lower edge of the heat exchanger, or is sloped toward the periphery. In addition to shaping the surface, multiple drainage holes are provided on this slope,
An outdoor unit for an air conditioner, characterized in that a drainage stream at the bottom is opposed to the lower end surface of the heat exchanger, and the peripheral edges of the drains other than the drain at the bottom are raised higher than the bottom plate surface.