JPH07190403A - Indoor unit of air-conditioner - Google Patents

Abstract

PURPOSE:To smoothen air suction and flow from a heat exchanger provided on the rear face side of an indoor unit and improve its capability for a flow rate without allowing a drain pan to be brought into contact with the heat exchanger to cause dehumidification condensate to flow to the air flow side and without the need for the additional grooving of the heat exchanger, which affects an increase of cost, by disposing an arcuate section of a substantially semicircular cylinder on the air flow side at a top end of the drain pan for the dehumidification condensate treatment, which is provided on the rear face side of the indoor unit. CONSTITUTION:Air suction and flow are smoothened and the capability of an indoor unit for an air flow rate is improved by mounting an arcuate section of a substantially semicircular cylinder 14 on an air flow side at a top end of a drain pan 5 for treating dehumidification condensate produced by a heat exchanger 8b provided on a rear face side of the indoor unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-flow blower type blower circuit and structure used in an air conditioner or the like.

[0002]

2. Description of the Related Art A conventional cross-flow blower type air conditioner has a structure as shown in FIG. 4 as described in Application No. 5-99169. An impeller unit 2 composed of a plurality of blades 1, a rear guider 3 and a stabilizer 4 around the impeller unit 2.
And form an air flow path. A water tray 5 is arranged on the upper part of the rear guider 3, and a guider 6 or a guide 7 for guiding the flow is attached to the tip thereof. Even if the guider 6 or the earl 7 comes into contact with the heat exchanger 8 to cause dew formation, the guider 6 or the earl 7 is arranged so as to flow down toward the water tray.

[0003]

However, in the cross-flow blower having the above-described structure, regarding the are attached to the tip of the water receiving tray, all the dehumidified water comes in the direction of the water receiving tray by contact with the heat exchanger. Some water does not flow and flows to the ventilation side, which makes water treatment difficult. Further, with respect to the guider attached to the tip of the water receiving tray, a groove for inserting the guider in the heat exchanger is required, which leads to an increase in cost due to the groove processing. Further, it is not possible to expect a sufficient improvement in performance simply by attaching a radius or a guider, and it is necessary to form an optimum shape by the suction flow from the heat exchanger on the back side.

Therefore, according to the present invention, by disposing a substantially semi-cylindrical radius on the ventilation side of the tip of the water tray, dehumidified water does not flow to the ventilation side in contact with the heat exchanger, and No additional grooving is required and cost is not affected. Further, the suction flow from the lower part of the heat exchanger on the back side is smoothed to improve the flow rate performance.

[0005]

The first technical means of the present invention for solving the above-mentioned problems is the ventilation side of the tip of the water tray for dehumidifying water of the heat exchanger arranged on the back side. By adding a semi-cylindrical radius, the suction flow is made smooth and the flow rate performance is improved.

[0006] The second technical means is to define the radius of the radius of the substantially semi-cylindrical column, which is strongly correlated with the diameter of the cross flow fan. Diameter: D, 0.01 <d / D <0.09. When d / D <0.01, peeling occurs from the front edge of the semi-cylindrical column, and when 0.09 <d / D,
Separation occurs from the trailing edge of the approximately semi-cylindrical column, and a strong turbulent flow is formed, resulting in increased noise.

In a third technical means, a dead water region is formed in the lower part of the substantially semi-cylindrical shape by smoothly connecting the radius of the approximately semi-cylindrical shape and the rear guider with a substantially diameter (connection diameter) φ. The flow that is sucked into the fan is smoothed, and the flow rate performance is improved.

The fourth technical means is to define the size of the connection diameter, and since it strongly correlates with the diameter of the approximately semi-cylindrical column, the connection diameter: φ is the radius of the approximately semi-cylindrical column: d. Make sure that d / φ <2. In the case of 2 <d / φ, a dead water region is likely to occur in the lower part of the substantially semi-cylindrical column, and a smooth flow field will not be formed.

[0009]

With the above construction, the suction flow from the heat exchanger on the back side is smoothly guided to improve the flow rate performance.
Further, the dehumidified water does not flow to the ventilation side in contact with the heat exchanger, and the additional groove processing of the heat exchanger is unnecessary, which does not affect the cost.

By appropriately defining the dimensions of the second technical means, it is possible to prevent the occurrence of peeling from the front and rear edges of the substantially semi-cylindrical column and to reduce noise.

By appropriately dimensioning the third technical means and the fourth technical means, the flow sucked into the fan is made smooth without forming a dead water region in the lower part of the substantially semi-cylindrical shape, and the flow rate performance is improved. .

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of the first embodiment of the present invention. Reference numeral 9 denotes a main body, and the main body 9 includes an underframe 10 and a front cover 11 attached to the front of the underframe 10, and an indoor air intake grill 12 is provided above the underframe 10 and the front cover 11. It is provided and a blowout port 13 is formed in the lower part.

FIG. 2 is a cross sectional view of the first embodiment of the present invention. Explaining the schematic configuration, the suction direction (160 ° to 200 °) when viewed from the center of the cross flow fan 2
A heat exchanger 8ab that is folded in two is disposed so as to surround the entire area of. By attaching a rounded semicircular column 14 to the ventilation side of the tip of the water tray 5 for dehumidifying water treatment of the heat exchanger 8b on the back side, the suction flow is made smooth and the flow rate performance is improved.

The second embodiment of the present invention regulates the radius of the radius of the substantially semi-cylindrical cylinder. The radius of the radius of the substantially semi-cylindrical cylinder is: d The diameter of the cross flow fan is D: 0.01 <D / D <0.09. d / D <0.01 or 0.09 <
In the case of d / D, separation occurs from the front edge or the rear edge of the substantially semi-cylindrical column, and a strong turbulent flow is formed, resulting in increased noise.

FIG. 3 is a cross-sectional view of the third embodiment of the present invention. A smooth connection is made with a substantially diameter (connection diameter) φ so as to contact both the radius of the substantially semi-cylindrical 14 and the rear guide 3.
As a result, the dead water region is not formed in the lower part of the substantially semi-cylindrical shape, and the flow sucked by the fan is made smooth to improve the flow rate performance.

In the fourth embodiment of the present invention, the size of the connection diameter φ is regulated. When the connection diameter: φ is the radius of a semi-cylindrical column: d, d / φ <2 . In the case of 2 <d / φ, a dead water region is likely to occur in the lower part of the substantially semi-cylindrical column, and a smooth flow field will not be formed. FIG. 4 shows a flow velocity distribution when the radius d of the substantially semi-cylindrical column, the connection diameter φ, and the cross flow fan D are set to the above-described conditions. It can be seen that there is no separation around the approximately semi-cylindrical column, and there is no dead water area under the approximately semi-cylindrical column, and the suction is performed smoothly.

[0018]

The suction flow from the heat exchanger on the back side is smoothly guided to improve the flow rate performance. Further, the dehumidified water does not flow to the ventilation side in contact with the heat exchanger, and the additional groove processing of the heat exchanger is unnecessary, which does not affect the cost.

Further, by appropriately defining the dimensions, it is possible to prevent the occurrence of separation from the front and rear edges of the substantially semi-cylindrical cylinder, to form a suction flow with a small turbulent flow intensity, and to reduce noise.

Further, the flow sucked into the fan is made smooth without forming a dead water region in the lower part of the substantially semi-cylindrical shape, and the flow rate performance is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of the third embodiment of the present invention.

FIG. 4 is a flow velocity distribution according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view of the prior art.

[Explanation of symbols]

1 blade 2 impeller unit (cross flow fan) 3 rear guider 4 stabilizer 5 water receiver 6 guider 7 are 8 heat exchanger 9 main body 10 frame 11 front cover 12 suction grille 13 outlet 14 approximately semi-cylindrical d almost semi-cylindrical Diameter D Diameter of cross-flow fan φ Connection diameter (diameter of curved surface that connects the semi-cylindrical cylinder and rear guider)

Claims (4)

[Claims] 1. A cross-flow fan comprising a combination of a plurality of blades having a fixed length arranged in a cylindrical shape in the direction of an axis of rotation, a cross-flow fan, a stabilizer located close to and opposite to the cross-flow fan, and a flow path. A rear guider that forms a heat exchanger and a heat exchanger disposed on the front side and the back side, and the ventilation side of the tip of the water tray for dehumidifying water of the heat exchanger disposed on the back side is a substantially semi-cylindrical column. The indoor unit of the air conditioner, which is characterized by the addition of a. 2. The diameter of the radius of the substantially semi-cylindrical column: d, and the diameter of the cross flow fan: D, 0.01 <d / D <0.09. Air conditioner indoor unit. 3. The indoor unit for an air conditioner according to claim 1 or 2, wherein the radius of the substantially semi-cylindrical column and the rear guider are smoothly connected to each other with a substantially diameter (connection diameter) φ. . 4. The air according to claim 1, wherein the connection diameter is φ, and the radius of the radius of the substantially semi-cylindrical column is d: d / φ <2. An indoor unit of a harmony machine.