JPH047458Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air conditioning evaporator used as an indoor unit of a household room cooler, and particularly relates to an evaporator for preventing condensed water from splashing out into the room.

[Prior art]

An air conditioning evaporator is constructed by arranging a large number of plate fins 1 in parallel with slight distances from each other as shown in FIG. The core 3 is configured by forming a refrigerant flow path. A drain pan 9 is disposed opposite to the lower surface of the core 3, and a fan 4 is positioned adjacent to the lower end of the core 3. This fan 4 is generally a Sirotskov fan. Thus, low-temperature refrigerant is allowed to flow through the tube 2, and the fan 4 is driven. Return air is sucked in from the front side of the core 3, circulated through the outer surfaces of the plate fins 1 and tubes 2 of the core 3, and cold air is blown out from the lower part of the evaporator body. At this time, condensed water 6 condenses on the outer surfaces of the plate fins 1 and tubes 2, gradually grows, and stays between the lower ends of each fin 1. Then, a part of it moves to the back side of the core due to the air flow 7. FIG. 8 shows this state. That is, the condensed water 6 is
B and C move in the downstream direction of the air flow 7 in this order, are separated into small pieces at the ends of the plate fins 1, and fall into the drain pan 9. However, some of the small condensed water 6 was mixed into the air flow 7 due to the motive force of the fan 4, and a portion of it sometimes flew out into the room.

[Means for solving problems]

Therefore, the present invention adopts the following configuration in order to prevent the condensed water 6 from being separated into small pieces at the lower end surface and to prevent the condensed water from jumping out into the room as shown in FIG. 8A.

That is, a core 3 is constructed by passing a plurality of tubes 2 through a plurality of plate fins 1 arranged in parallel with a small gap between them. A fan 4 is disposed adjacent to the lower end of the back side of the core 3. The feature of the present invention is that the lower end portions of the plate fins 1 on the back side are bent in the same direction so that the gap between the plate fins 1, 1 becomes smaller.

Therefore, according to the present evaporator, the surface tension of the condensed water 6 causes the condensed water 6 to form a large lump at the bent portion 8, and its own weight ensures that it falls into the drain pan 9, thereby preventing the condensed water 6 from being mixed into the airflow 7. can be prevented.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

Fig. 1 is a schematic perspective view of the main parts of the present evaporator, Fig. 2 shows the main parts as seen from the back side of the plate fin 1, and Fig. 3 is a sectional view taken along the - arrow in Fig. 2. FIG. 4 shows another embodiment of the same cross-sectional view. Moreover, FIG. 6 is an overall explanatory diagram of the present evaporator.

In the air conditioning evaporator of this embodiment, a core 3 is constituted by plate fins 1 and tubes 2, as shown in FIG. That is, a large number of plate fins 1 are arranged in parallel with slight distances from each other in the thickness direction, and the tube 2 is passed through each plate fin 1. Then, the ends of the tubes 2 are connected to each other by a U-shaped tube, thereby forming a meandering refrigerant flow path. The lower end of the back side of the core 3 thus formed is bent by applying an external force so as to be crushed, thereby forming a bent portion 8 there. The portion where this bent portion 8 is formed is in contact with the plate fins 1, 1 so that there is no small gap between them, as shown in FIG. 3, or with a slight gap formed between them, as shown in FIG. The small gap is made to be much smaller than the part other than the bent part 8. A low-temperature refrigerant is caused to flow through the tube 2 formed in this way, and the fan 4 is driven. Then, condensed water 6 adheres to the outer surfaces of the plate fins 1 and tubes 2,
It gradually grows, flows downward and stagnates. Then, as shown in FIG. 5, a part of the condensed water 6 is moved in order from A to B to C by the air flow 7. Then, from the state shown in (c), it is dripped into the drain pan 9. In the state shown in Fig. 5C, just before the condensed water 6 separates from the plate fins 1, the condensed water 6 is held between the plate fins 1 so as to straddle each plate fin 1, and the condensed water 6 grows into a large condensed water 6. . Then, it drips into the drain pan 9 due to its own weight. Note that some of the condensed water 6 moves to the back side of the core 3 and falls;
Other condensed water 6 falls directly from the lower end of the core 3 into the drain pan 9. In any case, the condensed water 6 will not mix into the air flow 7 and will not flow out into the room. Note that when the bent portions 8 of the plate fins 1 are in contact with each other as shown in FIG. to fall.

[Effect of idea]

The evaporator of the present invention has the above configuration and has the following effects.

In this evaporator, the lower ends of the back side of the plate fins 1 are bent in the same direction so that the small gap between the fins becomes small. It can be prevented from mixing with the stream 7 and flowing out into the room. That is, the bent portion 8 of the plate fin 1 causes the condensed water 6 to grow large on the back side of the core.
It can be smoothly guided to the drain pan 9 by its own weight.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of the main parts of the evaporator of the present invention, Fig. 2 is a schematic view of the plate fin 1 seen from the back side, Fig. 3 is a schematic cross-sectional view taken in the direction of - arrow in Fig. 2, and Fig. 4 is the same direction. 5 is an explanatory diagram showing a state in which a part of the condensed water 6 is moved by the air flow 7, FIG. 6 is an overall schematic diagram of the present evaporator, and FIG. 7 is a diagram of a conventional evaporator. FIG. 8 is a schematic perspective view of a main part, and is an explanatory diagram showing the state of movement of condensed water 6 by air flow 7 in the conventional type. 1...Plate fin, 2...Tube, 3...
... core, 4 ... fan, 5 ... main body, 6 ... condensed water, 7 ... air flow, 8 ... bending section, 9 ... drain pan.

Claims (1)

[Scope of utility model registration request] A plurality of tubes 2 are passed through a plurality of plate fins 1 which are arranged in parallel with a small gap between each other to form a core 3.
In an air conditioning evaporator in which a fan 4 is disposed adjacent to the lower end of the back side of the core 3, the lower end of the back side of the plurality of fins 1 is connected to the small gap between them. An air conditioning evaporator characterized by being bent in the same direction so as to be smaller.