JPS62194129A - Air conditioner - Google Patents

Abstract

PURPOSE:To reduce the amount of remaining water at a drain port and decrease the degree of forming of ice by a method wherein a shape of an extremity end of drain port of an air conditioner is machine worked to have an irregular shape. CONSTITUTION:An irregular shape is applied in the direction of height of burring of a drain port 4 of an air conditioner, a certain volume of dew 2 is collected at the convex portion and then the dew is dropped by its own weight. An extremity end of a drain port 4 is made as a corrugated form, a minimum radius of curvature R1 of a recess portion and a minimum radius of curvature R2 of a projecting portion are applied to have a relation of R1>=R2. With this arrangement, an amount of remaining dew becomes quite low and an amount of iced water at an extremity end of the drain port is also decreased. With this arrangement, no trouble is found at each of the component elements during a period when a temperature of an air conditioner is increased up to a surrounding atmosphere temperature under which an operation of the air conditioner is assured and so an operation of the air conditioner can be continued.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a drain hole for an air conditioner.

[Background of the invention]

In a conventional air conditioner, as shown in FIG. 6, channel water 2 generated when a heat exchanger is operated as an evaporator is drained through a drainage hole 4 provided in a bottom space 3. On this occasion,
As shown in FIG. 7, the drain hole 4 has a part of the bottom paste 3 processed by purling, and the end surfaces of the drain hole 4 are at the same height. For this reason, water can be drained uniformly from any part of the drain hole 4. On the other hand, in the case of an outdoor unit of a heat pump type air conditioner, during heating operation, water adheres to the heat exchanger as a junction water box. In order to melt this, a forced cooling operation is performed (hereinafter referred to as a defrosting operation).
Using the heat inside the room, the frost is melted through the refrigerant in the refrigeration cycle and discharged from the drain hole. At this time, if the outside air temperature is below freezing, the water that has melted and reached above freezing at the end of the defrosting operation will be transferred to the heat exchanger 1 due to the surface tension of the water.
It remains on the fin surface, the bottom base surface and the tip of the drainage hole 4. When the heating operation is started again, this residual dew freezes, and the storage box and defrosting process are repeated. On the other hand, when the outside temperature is low and you are removing snow, you can use the unit with the snow protection hood under it to remove frost.
Snow adhering to the fins also needs to be melted. In this case, the temperature of the waste water at the end of defrosting will be low. This uses heat from the indoor side to melt the frost attached to the outdoor heat exchanger, which causes the indoor room temperature to drop.To minimize this, the longest defrosting time is set. It is for this purpose. As a result, under conditions of low outside air, the water remaining at the end of the previous defrosting freezes at the tip of the drainage hole at the end of the unboxing, and the next defrosting water does not reach the end of the previous defrosting because the water temperature is low. The remaining frozen water cannot be completely thawed and further freezes on top of the previously frozen water. If this is repeated, the drainage hole will be filled with frozen water, and freezing will progress from the bottom space side of the space surrounded by the heat exchanger, bottom space, and outlet side plate, etc., and if the fan is located low, This frozen water may lock up or damage the fan.

[Purpose of the invention]

An object of the present invention is to improve the drainage performance of the bottom pace, reduce the amount of water remaining at the drain, and reduce the degree of freezing.

[Summary of the invention]

In order to reduce the surface tension of the residual dew at the drain, the drain is provided with concavities and convexities in the height direction of the burring, so that the dew collects only on the convex portions and falls under its own weight.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. 1st
The figure shows the cross-sectional shape of the drainage hole. The drainage type tip has a wave shape, and is manufactured with the minimum radius of curvature R1 of the concave portion and the minimum radius of curvature R2 of the convex portion as shown in the following formula.

R1≧R2 2 to 5 show the developed shape of the drainage hole of the present invention.

〔Effect of the invention〕

According to the present invention, the drainage performance at the tip of the drainage type is improved, so the residual gt becomes extremely small, and the amount of freezing at the tip of the drainage type is small. The range of outside temperatures that can be melted is expanded, and the degree of freezing progress is small, so there is no failure of each part until the outside temperature, which changes depending on weather conditions, rises to the outside temperature that is guaranteed for operation as a product. , operation can continue.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional diagram of a drainage hole according to an embodiment of the present invention, and FIGS. 2 to 5 are developed diagrams of irregularities at the tip of the drainage hole in FIG. 1. FIG. 6 is a structural diagram of an outdoor unit of a separate expansion and condensation conditioner according to the prior art, and FIG. 7 is a cross-sectional diagram of a drainage hole portion in FIG. 6. 1... Heat exchanger 2... Condensed water or frost 3...
・Bottom pace 4...m water hole 5...fan
6...Ceiling 7...Side plate 8...Suction side protection net 9...Blowout side protection net.

Claims (1)

[Claims] In an air conditioner consisting of a heat exchanger, an air blower, a top plate, a side plate, and a bottom plate having a hole for collecting and draining water, the tip of the drain hole is burred into an uneven shape.
An air conditioner characterized in that the radius of curvature at the base of the concave portion is larger than the radius of curvature at the tip of the convex portion, and one or more concentrated drainage holes are provided.