JPH0771783A - Suction type air conditioner - Google Patents

Abstract

PURPOSE:To provide a suction type air conditioner which enables the vertical dimension of a drain trap to be reduced to the least possible degree, makes it difficult for foreign matter to stay on the bottom of the trap and permits the trap to be cleaned easily even if it is gathered. CONSTITUTION:In a suction type air conditioner having a coil 3 disposed on the suction opening side of a fan 5, a drain trap A formed by bending arcuately the pipe (a) made from a transparent synthetic resin is provided in a drain passage from a drain pan 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction type air conditioner in which a coil is arranged on the suction port side of a fan.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a suction type ceiling-hung air conditioner. In the figure, 1 is a return air duct, 2 is an air filter, 3 is a coil, 4 is a drain pan arranged below it, 5 is a fan, and 6 is an air supply duct. In the suction type air conditioner, as shown in FIG. 4, the coil 3 is provided on the suction port (upstream side) side of the fan 5 so that the suction air from the fan 5 is heat-exchanged by the coil 3. Since it is configured, during operation, the portion of the drain pan 4 has a negative pressure, and the outside air flows in through the drain pipe 7. This air flow pushes back the condensed water in the drain pan 4, and finally the drain pan 4
Can lead to an overflow.

In order to prevent this, conventionally, as shown in FIG. 5, a drain trap A is provided in the drain discharge path from the drain pan 4, and the drain trap is caused by the negative pressure generated during the operation of the air conditioner. The head pressure H between the inlet side and the outlet side of A corresponds to the pressure difference from the atmospheric pressure. That is, the negative pressure during the operation of the fan 5 is canceled by the head pressure H of the drain trap A, and the flow of the condensed water to the drain pipe 7 is secured.

[0004]

However, in the above-mentioned conventional example, since the drain trap A was assembled by using the commercially available vinyl chloride straight pipe 10a and the joint 10b, the dimensions of the joint 10b and constrained by straight pipe 10a required insertion amount and the like for the joints 10b, as a result, the dimension between the outlet bottom and drain trap a lower end of the drain pan 4 L ₁
Is at least about 150 mm, and the dew-proof and heat-retaining thickness (thickness of the heat insulating material 8 for preventing dew condensation) that is installed around the drain pan 4
The vertical dimension including 0mm became large, and it was difficult to fit the ceiling surface 11, and sometimes the ceiling surface 11 had to be lowered.

The condensed water accumulated in the drain pan 4 is
Although dust such as dust and cotton dust scattered in the air is included, in the above-mentioned conventional example, the drain trap A has an angular shape assembled by using the joint (elbow) 10b and the straight pipe 10a. Therefore, dust collects on the bottom of the drain trap A, the path is easily closed, and the collected dust is not easy to clean. For example, even if water is made to flow from the drain pan 4 side, it is difficult to discharge dust only by the water flow, and it is also difficult to insert a brush or the like. Further, since the degree of dust accumulation cannot be visually confirmed, the cleaning time may be missed and an overflow from the drain pan 4 may occur.

The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to suppress the vertical dimension of the drain trap to be as small as possible, and further, to make dust trapped at the bottom of the trap. An object of the present invention is to provide a suction type air conditioner equipped with a drain trap that is hard to collect and that can be easily cleaned even if dust is collected.

[0007]

The technical means taken by the present invention to achieve the above object are as follows. That is, the suction type air conditioner according to the present invention is a drain formed by bending a single pipe into an arc shape in the drain discharge path from the drain pan in the suction type air conditioner in which the coil is arranged on the suction inlet side of the fan. It is characterized by interposing a trap. Although various types of materials can be used for the tube, it is desirable to use a transparent synthetic resin for the reason described below.

[0008]

According to the above structure, without using a commercially available elbow,
Since the drain trap is formed by bending a single pipe into an arc shape, the vertical dimension of the drain trap can be suppressed as small as possible. Further, since the drain trap is curved in an arc shape, it is difficult for dust to collect at the bottom of the trap, and even if dust is collected, water can be made to flow from the drain pan side and easily cleaned by the water flow.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a suction type ceiling-hung air conditioner according to the present invention. 1 is a return air duct, 2 is an air filter, 3
Is a coil, 4 is a drain pan disposed below the coil, 5 is a fan, 6 is an air supply duct, 7 is a drain pipe, and A is a drain discharge path from the drain pan 4, specifically, the drain pan 4 and the drain pipe. It is a drain trap interposed between the drain trap and the No. 7.

As shown in FIG. 2, the drain trap A has a single transparent synthetic resin pipe a (for example, a transparent vinyl chloride pipe) formed in an arc shape, that is, a central portion formed in a downwardly convex arc shape. , Both ends of which are smoothly bent in the opposite direction. The size of each part can be set arbitrarily, but in the illustrated embodiment, the distance L ₁ from the lower end of the outlet of the drain trap A to the bottom of the drain trap A is 64 mm,
The distance L ₂ from the outlet lower end of the drain trap A to the inlet lower end of the drain pipe 7 is set to 30 mm, and the horizontal length L ₃ of the drain trap A is set to 180 mm. Further, regarding the radius of curvature of the central portion of the drain trap A, the radius of curvature R ₁ on the upper side is set to 40 mm and the radius of curvature R ₂ on the bottom side is set to 72 mm. Then, during operation of the air conditioner, as shown in FIG. 3, the head pressure H at the inlet side and the outlet side of the drain trap A due to the negative pressure is configured to be 20 mm water column. A two-dot chain line 8 in FIG. 2 is a heat insulation material for dew condensation prevention with a thickness of about 20 mm for preventing dew condensation, which is installed around the drain trap A as necessary, and a one-dot chain line 9 in FIG. 3 seals the drain discharge route with water. It is drain (condensed water).

According to the above construction, since the drain trap A is formed by bending a single pipe into an arc shape without using a commercially available elbow, the vertical dimension of the drain trap A is kept as small as possible. It can be fitted with the ceiling. Moreover, since the drain trap A is curved in an arc shape, it is difficult for dust to collect at the bottom of the trap. It is easy to clean. In addition, since the drain trap A is transparent, it is possible to visually check the degree of accumulation of dust inside, and maintenance is easy.

[0012]

According to the first aspect of the present invention, since a single pipe is bent into an arc shape to form a drain trap, the vertical dimension of the drain trap can be suppressed as small as possible. Since the trap is curved in an arc shape, dust is unlikely to collect at the bottom of the trap, and even if dust is collected, water can be made to flow from the drain pan side and can be easily cleaned by the water flow. According to the second aspect, since the drain trap is transparent, the degree of accumulation of dust inside can be visually confirmed and maintenance is easy.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a suction type ceiling-hung air conditioner showing an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a main part.

FIG. 3 is a vertical cross-sectional side view of a main part when the air conditioner is in operation.

FIG. 4 is a schematic configuration diagram for explaining a problem of a suction type ceiling-hung air conditioner.

FIG. 5 is a vertical sectional side view of a main part showing a conventional example.

[Explanation of symbols]

A ... Drain trap, a ... Tube, 3 ... Coil, 4 ... Drain pan, 5 ... Fan.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeki Matsuzawa 4-1-1-13 Honmachi, Chuo-ku, Osaka Stock company Takenaka Corporation Osaka Main Store

Claims (2)

[Claims] 1. A drain trap formed by bending a single pipe into an arc shape is provided in a drain discharge path from a drain pan in a suction type air conditioner in which a coil is arranged on a suction port side of a fan. A suction type air conditioner. 2. The suction type air conditioner according to claim 1, wherein the pipe is made of a transparent synthetic resin.