Air conditioner

An air conditioner, air technology, applied in air conditioning system, space heating and ventilation details, air flow control components and other directions, can solve the problems of no air supply path, reduce operating sound, noise noise, etc., to reduce operating noise, eliminate The effect of the noise effect

Inactive Publication Date: 2012-05-30
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In active noise cancellation, since a sound wave (noise) traveling in a closed space such as a pipe that becomes a one-dimensional sound field (a sound field in which the propagation of sound is limited to one direction) approximates a plane wave, the sound wave emitted from the sound source for cancellation is used. The sound wave of the opposite phase can cancel the noise very well, and can effectively eliminate the noise, but in a three-dimensional sound field (a sound field that propagates sound in random directions) such as free space propagation, the sound wave becomes a spherical wave, and the noise is reversed due to the generation of noise. The area where the sound wave of the phase impacts back, and the area where the noise level rises between the same phases, so the existing technology cannot achieve practical application level noise eli

Method used

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Experimental program
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Effect test

no. 1 approach

[0072] figure 1 It is a schematic side sectional view of the indoor unit showing the state in which the air conditioner of the first embodiment is in operation, figure 2 It is a schematic side sectional view of an indoor unit showing an example of the operating state of the air conditioner according to the first embodiment, image 3 It is a schematic side sectional view of the indoor unit showing another example of the operating state of the indoor unit of the air conditioner according to the first embodiment.

[0073] Such as Figure 1 ~ Figure 3 As shown, an indoor unit 1 of an air conditioner holds a main body by a casing 2 , and a front panel 3 is detachably attached to the casing 2 , and a suction port 4 is provided on the upper surface side of the front panel 3 . The casing 2 and the front panel 3 constitute the box body of the indoor unit 1 .

[0074] The housing 2 is provided with claws (not shown) on the rear side, and the housing 2 is supported by engaging the cl...

no. 2 approach

[0105] Figure 10 It is a schematic side sectional view which shows an example of the operation state of the indoor unit 1 of the air conditioner of 2nd Embodiment. In this figure, with the aforementioned Figure 1 ~ Figure 3The parts that are the same as the indoor units of the air conditioner of the first embodiment shown are denoted by the same reference numerals, and description thereof will be omitted.

[0106] In the indoor unit 1 of the air conditioner of the present embodiment, as Figure 10 As shown, on the upper wall 6a of the air blowing path 6, facing the air blowing path 6, a reference microphone (reference detection sound device) 22 is provided, and the reference microphone 22 detects the operation noise including the blowing sound of the fan 7. As for the sound wave, a sound wave having an opposite phase to the sound wave detected by the reference microphone 22 is emitted from the speaker 21 . As shown in the figure, it is preferable to dispose the reference ...

no. 3 approach

[0120] Figure 15 It is a schematic side cross-sectional view showing an example of the operating state of the indoor unit 1 of the air conditioner according to the third embodiment. In this figure, with the aforementioned Figure 10 The same parts as the indoor unit of the air conditioner of the shown second embodiment are given the same reference numerals, and description thereof will be omitted.

[0121] Such as Figure 15 As shown, in the indoor unit 1 of the air conditioner of this embodiment, in addition to the reference microphone 22, the air guide panel 20 also has a correction microphone (correction detection sound device) for detecting sound waves after canceling the operating noise. 23, and correct the sound wave emitted from the speaker 21 so that the noise level detected by the correction microphone 23 is within a specified range. In this case, it is preferable to dispose the correction microphone 23 downstream of the speaker 21 in the duct-shaped blowing passa...

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Abstract

An air conditioner is provided, near the air discharge opening (5), with an air flow guide panel (20) and a speaker (21). The air flow guide panel (20) is operated to form a duct-like air discharge path (10) near the air outlet (5), and a sound wave for canceling operation noise including the air blowing noise of the fan (7) is emitted from the speaker (21) to the duct-like air discharge path (10).

Description

technical field [0001] The present invention relates to an air conditioner, and more specifically, to an air conditioner capable of reducing noise during operation such as blowing sound. Background technique [0002] In the past, in order to reduce the noise during the operation of the air conditioner, such as the blowing sound of the air conditioner, an air conditioner with an active noise control mechanism (also called active noise cancellation) has been proposed. to cancel out the noise. [0003] For example, in Patent Document 1, a microphone and a panel speaker are installed in a predetermined space of an indoor unit of an air conditioner, and noise of a specific frequency detected by the microphone is emitted from the panel speaker at substantially the same frequency and at substantially the same sound pressure level. , Sound waves with substantially opposite phases can effectively eliminate noise. [0004] In addition, the technology disclosed in Patent Document 2 i...

Claims

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Application Information

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IPC IPC(8): F24F13/06F24F11/02F24F13/14F24F13/20G10K11/16G10K11/178F24F1/008
CPCG10K11/178F24F13/24G10K2210/112G10K2210/104F24F1/0007F24F2013/247G10K11/17857G10K11/1783G10K11/17821G10K11/17823G10K11/17873G10K11/17881F24F1/008
Inventor 竹田康坚大塚雅生
Owner SHARP KK
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