Air conditioning device

A technology for air-conditioning devices and air-conditioning shells, which is applied to air-conditioning systems, transportation and packaging, and parts of pumping devices for elastic fluids. Effect
CN110462222AActive Publication Date: 2019-11-15DENSO CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
DENSO CORP
Publication Date
2019-11-15

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Abstract

An air conditioning device has an air conditioning case (10), a blower fan (11), and a facing wall (14). The air conditioning case constitutes an air passage through which air to be delivered to a room interior flows. The blower fan is disposed within the air conditioning case. The facing wall is provided upstream of the blower fan in the direction of air flow and is disposed facing the intake opening of the blower fan. The air conditioning case has a facing surface (12a) facing the facing wall and having a through-hole (12b) formed therein. The air conditioning case has formed therein a closed space (12c) formed on the opposite side of the facing surface from the air passage and in communication with the air passage through the through-hole. The through-hole and the closed surface form aresonator having a predetermined resonance frequency.
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Description

[0001] Cross-references to related applications

[0002] This application is based on JP Patent application No. 2017-54344 for which it applied on March 21, 2017, The disclosure content is incorporated in this application by reference. technical field

[0003] The present invention relates to an air conditioner equipped with a blower fan. Background technique

[0004] In an air conditioner equipped with a blower fan, noise is generated as the blower fan rotates. Therefore, in Patent Document 1, it is proposed to reduce noise by using a bellmouth resonator. In this blower, a resonator composed of an opening and a cavity communicating with the opening is provided in the bellmouth, and the resonant frequency of the resonator is made to match the frequency of noise accompanying the rotation of the blower fan, thereby reducing noise.

[0005] prior art literature

[0006] patent documents

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 10-227299 [0008...

Claims

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