Cross-flow blower and indoor unit of air-conditioning device equipped with same

A cross-flow and fan technology, which is applied to components of pumping devices for elastic fluids, air-conditioning systems, machines/engines, etc., can solve problems such as reduction and increase in pressure loss, and achieve the effects of suppressing noise and suppressing surge Effect

Active Publication Date: 2019-05-21
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, at both ends of the blowing flow path in contact with the side wall of the case, friction occurs between the blown air and the side wall of the case, and the flow velocity of the blown air decreases as it approaches the downstream side, resulting in the following: Problem: If the pressure loss of the air flow in the indoor unit increases due to clogging of the filter, etc., there will be almost no flow of blown air at both ends near the blowing outlet of the blowing flow path, and the air will flow from the two ends. Backflow from part to the upstream side of the blowing flow path

Method used

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  • Cross-flow blower and indoor unit of air-conditioning device equipped with same
  • Cross-flow blower and indoor unit of air-conditioning device equipped with same
  • Cross-flow blower and indoor unit of air-conditioning device equipped with same

Examples

Experimental program
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no. 1 approach 》

[0046] Such as figure 1 As shown, the indoor unit 10 is installed in a suspended ceiling 1 formed by making the ceiling of the indoor space S protrude a little toward the room. The indoor unit 10 includes a casing 20 , a cross-flow fan 30 , a heat exchanger 40 , a water tray 50 and an electronic component box 60 . The cross-flow fan 30 , the heat exchanger 40 , the water receiving tray 50 and the electronic component box 60 are arranged in the casing 20 .

[0047] The cabinet 20 is formed of a substantially rectangular parallelepiped box. Specifically, in figure 1 Among them, the casing 20 is configured as a thin box with a long vertical length, and the vertical length (front and back direction of the paper) is longer than the horizontal (left and right direction of the paper) length of the box when viewed from above, and the height is smaller than the horizontal length. On one lateral side of the casing 20 ( figure 1 An inflow port 21 is formed on the right side of the ho...

no. 2 approach 》

[0101] In the second embodiment, the ceiling-mounted indoor unit 10 in the first embodiment is configured as a wall-mounted indoor unit 10 mounted on a wall.

[0102] Specifically, as Figure 9 As shown, the indoor unit 10 includes a casing 20 , a cross-flow fan 30 , a heat exchanger 40 , a water tray 50 and a filter 80 . It should be noted that the indoor unit 10 further includes a control unit not shown. The fan 30 , the heat exchanger 40 , the water receiving tray 50 , the filter 80 and the control unit are arranged in the casing 20 .

[0103] The cabinet 20 is formed into a box shape by a front panel 20F covering the front surface, a rear panel 20R covering the rear surface, an upper panel 20U covering the upper surface, a bottom panel 20B covering the bottom surface, and two side panels 20S covering both sides. . In addition, an inlet 21 through which air flows in and an outlet 22 through which air flows out are formed in the casing 20 . The inflow port 21 is formed o...

no. 3 approach 》

[0149] The third embodiment is obtained by changing the shape of the blowing flow path F of the first embodiment. Except for the shape of the blowing flow path F, the configuration is the same as that of the first embodiment. Hereinafter, only the structure of the blowing flow path F and the flow of air in the blowing flow path F that are different from those of the first embodiment will be described, and descriptions of other structures and operations will be omitted.

[0150] [Blowout flow path]

[0151] Such as Figure 14 As shown, in this third embodiment, the first extension wall portion (first wall portion) 36b of the first guide member 36 and the second extension wall portion (first wall portion) of the second guide member 37 arranged to face each other are also formed. The second wall portion) 37b and the two side wall portions 38 define the blowing flow path F. In addition, the outlet flow path F has a throttle portion 70 in which the flow path cross-sectional area...

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Abstract

A cross-flow blower (30) provided with a fan rotor (31) and a housing (32), wherein two sidewall parts (38) disposed on both ends in the axial direction of the fan rotor (31) are formed in such a manner that a blowout flow passage (F), which is defined by a first extension wall part (36b) continuing from a tongue part (36a) of the housing (32) to extend up to a blowout port (32b), a second extension wall part (37b) facing therewith, and the two sidewall parts (38), has a constricted part (70) where the cross-sectional area of the flow passage becomes narrower from the upstream side toward thedownstream side by the cross-sectional shape of the flow passage changing from a rectangular shape to a trapezoidal shape in which the width on the second extension wall part (37b) side is shorter than the width on the first extension wall part (36b) side.

Description

technical field [0001] The invention relates to a cross-flow fan and an indoor unit of an air-conditioning device including the cross-flow fan. Background technique [0002] Conventionally, cross-flow fans have been used in indoor units of air conditioners (see, for example, Patent Document 1 below). [0003] The cross-flow fan includes a fan rotor (fan rotor) and a casing. The fan rotor is cylindrical and has a plurality of blades and rotates around a central axis. An air suction port and a blowout port are formed on the casing. The fan rotor is housed in the casing. In this cross-flow fan, the fan rotor rotates around the central axis in the housing, whereby the air sucked into the housing from the suction inlet passes through the fan rotor and flows toward the blower outlet. [0004] Patent Document 1: Japanese Laid-Open Patent Publication No. 2008-275231 Contents of the invention [0005] -The technical problem to be solved by the invention- [0006] In the blowing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D17/04F04D29/66F04D29/28F04D29/42F24F1/0025
CPCF04D17/04F24F1/00F04D29/441F04D29/4226F04D29/661F04D29/281F24F1/0025
Inventor 柏原贵士刘锦帆寺冈弘宣
Owner DAIKIN IND LTD
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