JPS6317934Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner, and particularly to an air conditioner suitable for use as a separate wall-mounted indoor unit.

An example of a conventional separate wall-mounted indoor unit is shown in Figures 1 and 2, where 1 is the front panel, 2 is the casing, 3 is the blower, 4 is the drain pan, 5 is the outlet grill, and 6 is the heat exchanger. Show the vessel. heat exchanger 6
comprises a large number of fin plates 6a parallel to the air flow indicated by arrows, and a large number of heat transfer tubes 6b passing through the fin plates 6a perpendicularly and extending parallel to each other at intervals, and a row 6c of these heat transfer tubes 6b. ,6
d are arranged one behind the other in relation to the air flow. The heat exchanger 6 is arranged so as to be inclined in front and behind the air flow.

During cooling operation, the refrigerant or cold water flowing inside the heat exchanger tubes 6b is sucked by the blower 3 and the heat exchanger tubes 6b
The indoor air is cooled by exchanging heat with the indoor air flowing outside the fin plate 6a and between the fin plates 6a. On this occasion,
Moisture in the indoor air condenses on the outer surface of the heat exchanger tube 6b and the surface of the fin plate 6a, and most of this condensed water is absorbed by the heat exchanger 6, which is tilted rearward, as shown in FIG. Since the room air flows backward, it flows down along the rear part of the fin plate 6a. For this reason, when the heat transfer amount of the heat exchanger tubes 6b in the rear row decreases and the wind speed passing through the heat exchanger 6 is high, or when oil and fat adhere to the surface of the fins 6a,
If the slope of the heat exchanger 6 is too large,
Water droplets of condensed water may be blown off while flowing down, not entering the drain pan 4, and scattered. Even though the heat exchanger 6 is inclined, there are still some water droplets flowing down the front part of the fin plate 6a. Therefore, the width of the drain pan 4 has to be greater than the width (depth) of the heat exchanger 6, resulting in a problem that the depth of the indoor unit becomes thicker.

The present invention was proposed in order to solve the above-mentioned problems, and its gist is that a large number of fin plates are arranged parallel to the air flow, and that the fin plates penetrate perpendicularly to the fin plates and are spaced apart from each other. In an air conditioner in which a heat exchanger is provided with a large number of heat exchanger tubes extending in parallel, and a plurality of rows of heat exchanger tubes are arranged in front and behind the air flow, the heat exchanger is arranged obliquely in front and behind the air flow. The heat exchanger was divided into the above-mentioned rows, a gap was created between the upper parts of each divided element, the lower parts were brought into contact with each other, and the lower ends of the windward elements were positioned higher than the lower ends of the leeward elements. The air conditioner is characterized by:

Since the present invention has the above configuration, water droplets condensed on the surface of the plate fin of the windward element are guided to the leeward element at the lower end or slightly above the plate fin. Therefore, the amount of water held by the plate fins of the leeward element is substantially equal to the amount condensed in that element, and is significantly reduced, so that water droplets do not scatter during the flow down. Since water droplets generated in each element are guided to the leewardmost element and fall from there into the drain pan, the width of the drain pan can be approximately equal to the width (depth) of the leewardmost element. Therefore, the drain pan can be made lighter and smaller, reducing its cost, and at the same time, the depth of the air conditioner can be made thinner.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 and 4. The heat exchanger 10 is divided into rows of heat exchanger tubes, and consists of a windward side element 11 including a front row of heat exchanger tubes 11b and a leeward side element 12 including a rear row of heat exchanger tubes 12b. 11a is a fin plate of the windward side element 11, and 12a is a fin plate of the leeward side element 12. These elements 11 and 12 are disposed with a gap between their upper parts, their lower parts contacting each other, and the lower end of the windward element 11 being located higher than the lower end of the leeward element 12. The rest of the structure is similar to the conventional one shown in FIG. 1, and corresponding members are given the same reference numerals.

A refrigerant or cold water is passed through the heat transfer tubes 11b and 12b of each element 11 and 12, and indoor air is sucked in by the blower 3, and the indoor air is transferred to each element 1 as shown by the arrow.
When the flow passes between the fin plates 11a and 12a of the fin plates 1 and 12, the plate fin 1 of the windward side element 11
As shown in FIG. 4, most of the water droplets a condensed on the surface of the fins 1a travel along the rear inclined surface 11c of the windward side element 11 due to the influence of gravity and the surface tension between the water droplets a and the surface of the fins 11a, and reach the lower end. 11d and the lower end 11d is in contact with the leeward element 12, so it is guided to the leeward element 12 from the lower end 11d or slightly above it. The water droplet a guided to the leeward side element 12 passes through the plate fin 12a and enters the drain pan 4. Most of the water droplets b condensed on the surface of the plate fins 12a of the leeward side element 12 flow down along the rear inclined surface 12c and enter the drain pan 4 from its lower end.

In this way, the amount of water retained in the leeward side element 12 is about half that of the conventional element shown in FIG. 1, and there is no possibility that water droplets will scatter and fall on the way. Therefore, the width of the drain pan 4 can be made substantially equal to the width (depth) of the leeward side element, so the drain pan 4 becomes small and lightweight, and its cost is also reduced. Furthermore, since the width of the drain pan 4 only needs to be small, the unit can be made thinner.

In the above embodiment, the case where there are two rows of heat exchanger tubes has been explained, but if there are three rows of heat exchanger tubes, the heat exchanger can be divided into three and arranged as shown in FIG. Just do it.

[Brief explanation of the drawing]

FIGS. 1 and 2 show an example of a conventional separate wall-mounted indoor unit, with FIG. 1 being a longitudinal sectional view and FIG. 2 being an enlarged view of a heat exchanger. 3 and 4 show one embodiment of the present invention, with FIG. 3 being a longitudinal sectional view and FIG. 4 being an enlarged view of the heat exchanger. FIG. 5 is a diagram corresponding to FIG. 4 in another embodiment of the present invention. Heat exchanger...10, windward element...11, fin plate...11a, heat transfer tube...11b, leeward element...12, fin plate...12a, heat transfer tube...12b.

Claims (1)

[Scope of utility model registration request] A plurality of fin plates parallel to the air flow and a plurality of heat transfer tubes passing through the fin plates perpendicularly and extending parallel to each other at intervals, the plurality of rows of heat transfer tubes extending back and forth with respect to the air flow. In an air conditioner in which an array of heat exchangers is arranged at an angle in front and behind the air flow, the heat exchanger is divided into each row, a gap is created between the upper parts of each divided element, and the lower part is divided into two parts. An air conditioner characterized in that the elements are in contact with each other and the lower end of the windward element is positioned higher than the lower end of the leeward element.