Duct and ion generating unit

Abstract

To curb a cost required for damping noise in a duct.SOLUTION: A duct 16 comprises: a bent section 20 formed by bending a flow passage 18 leading ions from an ion generation device 14 to an air-conditioning duct 10; and resonance type noise dampers 30, 32 and 34 with communication ports 30a, 32a and 34a thereof respectively communicated with the flow passage 18. The communication ports 30a, 32a and 34a of the noise dampers 30, 32 and 34 are arranged at a downstream side of a region other than an outer side of a bend of the bent section 20.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a duct having a silencer and an ion generating unit including the duct. [Background technology]

[0002] Ions generated by an ion generating device are sent to an air conditioning duct via an ion emission duct, and are released from the air conditioning duct into the room together with the air, and the ions sterilize and deodorize the room, etc. Since noise is generated when ions are generated in the ion generating device, it has been proposed to install a cylindrical sound absorbing member made of rubber sponge midway through the ion emission duct, and the sound is absorbed by the sound absorbing member to prevent sound from leaking into the room (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5698033 Summary of the Invention [Problem to be solved by the invention]

[0004] If a separate sound absorbing member is attached to the ion emission duct as in Patent Document 1, the cost will increase.

[0005] The present invention has been proposed in view of the above-mentioned problems associated with the conventional technology, and aims to provide a duct and an ion generating unit that reduce the costs associated with noise reduction. [Means for solving the problem]

[0006] In order to overcome the above problems and achieve the intended object, the duct according to the present invention comprises: A duct having a bent portion at which a flow passage for guiding ions from an ion generating device to an air conditioning duct is bent, a resonance type silencer having a communication port communicating with the flow passage; The gist of the invention is that the communication port is disposed downstream of a region other than the outside of the bend in the bent portion.

[0007] In order to overcome the above problems and achieve the intended object, the duct according to the present invention comprises: A duct having a bent portion in which a flow passage for guiding ions from an ion generating device to an air conditioning duct is bent at an angle of 45° or more, a resonance type silencer having a communication port communicating with the flow passage; The communication port is arranged on the downstream side of the inner bend in the bent portion.

[0008] In order to overcome the above problems and achieve the intended object, the ion generating unit according to the present invention comprises: A duct according to the present disclosure; The present invention relates to an ion generating device. Effect of the Invention

[0009] The duct according to the present invention makes it possible to reduce costs associated with sound deadening. According to the ion generating unit of the present invention, costs associated with noise reduction can be reduced. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a plan view showing an ion generating unit including a duct according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing a duct of the embodiment. [Diagram 3] FIG. 2 is a cross-sectional view showing an ion generating unit having a duct according to an embodiment. [Figure 4] 2 is a cross-sectional view taken along line AA in FIG. 1. [Diagram 5] FIG. 13A is a plan view showing a modified example of the duct, and FIG. 13B is a view taken along the X arrow in FIG. [Figure 6] 2 is a cross-sectional view showing another example of a communication port, taken along line AA in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Next, a duct and an ion generating unit including the duct according to the present invention will be described below by way of preferred embodiments with reference to the accompanying drawings. EXAMPLES

[0012] As shown in FIG. 1, the ion generating unit 12 includes an ion generating device 14 capable of generating ions, and an ion duct (duct) 16 that guides ions from the ion generating device 14 to an air conditioning duct 10. The air conditioning duct 10 guides air sent from an air conditioning unit (not shown) to a destination such as a vehicle interior, and is configured to release ions supplied from the ion generating unit 12 together with the air to the destination. The ion generating device 14 may be one that generates ions also called nanometer-sized charged particle water, nano-sized mist, electrostatic fine particles, etc., by applying a high voltage to a discharge electrode to atomize ionized water. The ion generating device 14 may include a blowing means such as a fan or blower (not shown).

[0013] As shown in Figs. 1 to 3, the ion duct 16 has bent portions 20, 22 at which the flow passage 18 that guides ions from the ion generating device 14 to the air conditioning duct 10 is bent. The ion duct 16 of the embodiment has two bent portions 20, 22. More specifically, the ion duct 16 is bent from a first pipe portion 24 having an inlet 16a connected to the ion generating device 14 at the first bent portion 20 to connect to a second pipe portion 26, and is bent from the second pipe portion 26 to a third pipe portion 28 having an outlet 16b connected to the air conditioning duct 10 at the second bent portion 22. In the ion duct 16 of the embodiment, the flow path direction is changed by 90° on the downstream side of the bent portions 20, 22 with respect to the upstream side of the bent portions 20, 22. The bending angle (α) of the bent portions 20,22 refers to the angle formed by an extension of an axis passing through the flow passage 18 upstream of the bent portions 20,22 and an axis passing through the flow passage 18 downstream of the bent portions 20,22.

[0014] As shown in FIG. 1 to FIG. 3, the ion duct 16 includes resonance type silencers 30, 32, and 33 whose communication ports 30a, 32a, and 34a are connected to the flow passage 18. The resonance type silencers 30, 32, and 33 reduce sound by interference of sound waves caused by a resonance space connected to the flow passage 18 through the communication ports 30a, 32a, and 34a, and are sometimes called interference type. As the resonance type silencers 30, 32, and 33, various types such as Helmholtz type and side branch type can be used alone or in combination. In the embodiment, three silencers 30, 32, and 34 are arranged along the flow passage 18, and the first silencer 30 arranged on the most upstream side and the second silencer 32 arranged on the downstream side of the first silencer 30 are Helmholtz type, and the third silencer 34 arranged on the most downstream side is a side branch type.

[0015] As shown in Figs. 1 to 3, in the ion duct 16 of the embodiment, the communication ports 30a, 32a, 34a of the silencers 30, 32, 34 communicate with the flow passage 18 of the second pipe section 26 between the first bent section 20 and the second bent section 22. As shown in Figs. 3 and 4, the communication ports 30a, 32a, 34a are disposed downstream of the region other than the outside of the bend in the first bent section 20. When the communication ports 30a, 32a, 34a are provided downstream of the first bent section 20, they may be disposed, for example, downstream of the inside of the bend in the first bent section 20 (see Fig. 4). In addition, they may be disposed downstream of the first bent section 20 on the surface of the duct 16 facing the axial direction of the bend of the first bent section 20 (the upper surface or lower surface of the duct in Fig. 4). 6, the communication ports 30a, 32a, 34a may be disposed downstream of the first bent portion in a region extending from one surface (upper surface of the duct in FIG. 6) facing the axial direction of the first bent portion 20 of the duct 16 through the inside of the bend to the other surface (lower surface of the duct in FIG. 6) facing the axial direction of the bend. In the embodiment, the communication ports 30a, 32a, 34a are disposed downstream of the inside of the bend in the first bent portion 20 (see FIG. 4). Note that the communication ports 30a, 32a, 34a in the embodiment open to a smaller area than the cross-sectional area of ​​the flow passage 18 of the second pipe portion 26.

[0016] 1 to 3, the multiple silencers 30, 32, 34 are disposed on the side corresponding to the inside of the bend of the first bent portion 20. The multiple silencers 30, 32, 34 are disposed by utilizing the extension space of the first pipe portion 24 extending in a direction intersecting with the second pipe portion 26.

[0017] As shown in FIG. 1 to FIG. 3, the ion duct 16 includes a duct fixing seat 36 for fixing the ion duct 16. In the ion duct 16, the duct fixing seat 36 is provided on the silencers 30, 32, and 34. More specifically, the duct fixing seat 36 of the embodiment is a plate-like portion that is connected to the second pipe portion 26 and is provided between the silencers 30, 32, and 34, and a through hole 36a for passing a fastener such as a bolt is formed in a portion that protrudes from the first silencer 30 and the second silencer 32. The ion duct 16 of the embodiment is fixed by passing a fastener through the through hole 36a and fastening it to a component part on the vehicle body side. By providing the duct fixing seat 36 in this way, the ion duct 16 can be easily attached and can be stabilized after attachment.

[0018] The ion duct 16 of the embodiment is a blow-molded product made of resin (for example, polyethylene (HDPE, LDPE), polypropylene (PP), etc.) in which the bent portions 20, 22, the pipe portions 24, 26, 28, the silencers 30, 32, 34, and the duct fixing seat 36 are integrally formed.

[0019] In the ion duct 16, it is known that in the flow passage 18 downstream of the first bend 20, ions flow biased toward the outside of the bend of the first bend 20 due to the influence of inertia (see the arrow in FIG. 3). By arranging the communication openings 30a, 32a, 34a of the silencers 30, 32, 34 downstream of the area other than the outside of the bend in the first bend 20, it is possible to prevent the ions flowing biased toward the outside of the bend from entering the silencers 30, 32, 34 from the communication openings 30a, 32a, 34a. As a result, even if a resonance type silencer 30, 32, 34 having a resonance space communicating with the flow passage 18 is used, the ions can be efficiently supplied to the air conditioning duct 10 without being destroyed, and various effects of the ions can be appropriately obtained. In addition, since it is possible to adopt the resonance type silencer 30, 32, 34 having a simple structure that only forms a resonance space, it is possible to suppress an increase in the number of parts and the labor required for assembly, thereby suppressing the cost of sound silencing.

[0020] In the ion duct 16, the positions at which the communication ports 30a, 32a, 34a are arranged in the circumferential direction of the pipe sections 24, 26, 28 may be set based on the closest one to the communication ports 30a, 32a, 34a among the bent sections with a bend angle of 45° or more upstream of the communication ports 30a, 32a, 34a. The modified example shown in Fig. 5 includes a first bent section 20 and a third bent section 38 provided downstream of the first bent section 20 and bent in the axial direction of the bend of the first bent section 20, and the communication ports 30a, 32a are arranged in the pipe section 29 downstream of the third bent section 38. Here, the bend angle (α1) of the first bent section 20 is 45° or more (90° in the modified example), and the bend angle (α2) of the third bent section 38 is smaller than 45° (10° in the modified example). In this case, the positions of the communication openings 30a, 32a in the circumferential direction of the pipe section 29 are set based on the bend of the first bend section 20, rather than based on the third bend section 38. That is, the communication openings 30a, 32a may be disposed on the downstream side of the inner side of the bend in the first bend section 20. In this way, the positions of the communication openings 30a, 32a in the circumferential direction of the pipe section 29 are set based on the first bend section 20, which has a larger effect on the flow of ions than the third bend section 38, so that it is possible to avoid breaking ions by the silencers 30, 32. If the bend angle (α1) of the first bend section 20 is 45° or more and the bend angle (α2) of the third bend section 38 is 45° or more, the positions of the communication openings 30a, 32a in the circumferential direction of the pipe section 29 may be set based on the third bend section 38, not the first bend section 22. In this way, by setting the positions of the communication openings 30a, 32a in the circumferential direction of the tube section 29 based on the third bend 38, which has a greater effect on the flow of ions than the first bend 20, it is possible to avoid the silencers 30, 32 destroying ions.

[0021] (Example of change) The present invention is not limited to the above, and may be, for example, as follows: It should be noted that the present invention is not limited to the specific descriptions of the examples and the following modified examples. (1) The shape of the ion duct is not limited to the shape in the embodiment. For example, the cross-sectional shape of the ion duct is not limited to a circle, but may be a rectangle or other shapes. The number of bent portions in the ion duct may be one, or three or more. In addition, the bending angle of the bent portion is not limited to the embodiment, and can be set to various bending angles. In the embodiment, the multiple bent portions are bent on the same plane, but the ion duct may be bent three-dimensionally, for example, the third bent portion and the second bent portion are bent in the axial direction of the bent first bent portion as in the modified example. (2) The number of mufflers may be one or four or more. In addition, the positions of the mufflers may be changed as appropriate, for example, by arranging one muffler downstream of the first bent portion and another muffler downstream of the second bent portion. (3) The ion duct is not limited to being a blow molded product, but may be an injection molded product or may be manufactured by other manufacturing methods. In addition, the ion duct is not limited to being made of resin, but may be made of other materials such as metal. [Explanation of symbols]

[0022] 10 air conditioning duct, 12 ion generating unit, 14 ion generating device, 16 ion duct (duct), 18 flow passage, 20 first bend (bend), 30, 32, 34 silencer, 30a, 32a, 34a communication port, 36 duct fixing seat, α Bending angle

Claims

1. A duct having a bent portion at which a flow passage for guiding ions from an ion generating device to an air conditioning duct is bent, a resonance type silencer having a communication port communicating with the flow passage; The communication port is disposed downstream of a region other than the outer side of the bend in the bent portion. A duct characterized by:

2. A duct having a bent portion in which a flow passage for guiding ions from an ion generating device to an air conditioning duct is bent at an angle of 45° or more, a resonance type silencer having a communication port communicating with the flow passage; The communication port is disposed on the downstream side of the inner side of the bend in the bent portion. A duct characterized by:

3. 3. The duct according to claim 1, wherein the muffler is provided with a duct fixing seat for fixing the duct.

4. A duct according to any one of claims 1 to 3; The ion generating unit includes an ion generating device.

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