JP4293823B2 - Air conditioning duct device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioning duct device that sucks air (outside air) and sends it into a living space.
[0002]
[Prior art]
The conventional air-conditioning duct apparatus has a blower that sucks outside air into the blower unit and blows it to the air conveyance path, a linear high voltage application electrode, and a wire mesh ground electrode, and generates negative ions. A device provided with a container is known (for example, see Patent Document 1).
[0003]
In particular, when the air conditioning duct device is provided on the ceiling, as described in paragraph 0095 and FIG. 24 of the above-mentioned Patent Document 1, the blower unit is installed in the ceiling back space separated from the living space by the ceiling wall. Therefore, it is necessary to remove and disassemble the entire blower unit from the ceiling space at the time of maintenance and repair of the negative ion generator, which is very troublesome.
[0004]
FIG. 5 illustrates another example of a conventional air conditioning duct device. In FIG. 5, reference numeral 1 denotes an L-shaped outlet duct that is formed entirely of an insulator such as a resin and includes an outlet 2 that blows outside air (air) into a living space (for example, the interior of a house) 4 in which a human lives. is there. A pipe space 11 for various pipes is formed above the ceiling wall 5 of the living space 4, and a blower unit 6 is provided therein. The ceiling wall 5 is provided with a hole 12 having the same size as the periphery of the outlet 2 of the second outlet duct 1.
[0005]
The blower unit 6 includes an air conveyance duct 7, a filter 8, and a blower 9. The air carrying duct 7 is installed horizontally at a predetermined location in the piping space 11, the blowout duct 1 is connected to one end, and the air inlet 10 is provided to the other end. The filter 8 is attached to the air inlet 10 and removes dust and dirt contained in the outside air. The blower 9 is installed in the vicinity of the air inlet 10, and sucks outside air through the filter 8 and blows the sucked outside air to the air conveyance duct 7 and the blowout duct 1. The air conveying duct 7, the filter 8 and the blower 9 constitute a blowing means.
[0006]
The blowout duct 1 is a resin molded product formed in a shape bent into an L shape, and a connection port 3 is formed at an end portion on the opposite side of the blowout port 2. The operation of connecting the blowout duct 1 to the air carrying duct 7 is performed from the living space 4 side. However, since the hole 12 of the ceiling wall 5 is opened only about the size of the blowout opening 2, as shown in FIG. The blowing duct 1 held so that the mouth 3 faces upward is laid down slightly and inserted from the hole 12. The direction of the blowing duct 1 is adjusted while looking into the piping space 11 and connected to the downstream end of the air conveying duct 7. Insert mouth 3.
[0007]
This air conditioning duct device has only a function of sucking air (outside air) and sending it into the living space. However, by providing a positive / negative ion generator in the blowout duct 1, positive / negative ions generated from the ion generator together with the air flow. Can be supplied to the living space 4, and the effect of sterilization and sterilization of the living space 4 can be expected.
[0008]
In this case, since positive and negative ions disappear when they collide with an obstacle, it is desirable to provide an ion generator at the downstream end of the air flow where the inner surface of the blowout duct 1 is unlikely to become an obstacle, that is, near the outlet 2. .
[0009]
[Patent Document 1]
JP 2002-277010 A (paragraph 0095, FIG. 24)
[0010]
[Problems to be solved by the invention]
However, if the ion generator is provided in the vicinity of the air outlet 2, it is expected that the main body of the ion generator protrudes to the outside of the air outlet duct 1. In fact, if the air outlet duct 1 is inserted through the hole 12, the ion generation occurs. The vessel gets caught in the ceiling wall 5 and becomes in the way, and the blowout duct 1 cannot be mounted.
[0011]
The present invention has been made in view of the above problems, and in an air-conditioning duct apparatus equipped with an ion generator, the blowout duct can be easily mounted and the number of positive and negative ions generated from the ion generator can be reduced. It aims at providing few air-conditioning duct apparatuses.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a connection port connected to a downstream end of an air conveyance duct piped in an upper space of a ceiling wall and a blowout port arranged in the ceiling wall, and is L-shaped. Ion generation that forms a smooth surface outside the bent part of the blowout duct formed in a bent shape, and has a box-shaped main body on the smooth surface, and generates positive and negative ions in an opening provided on one surface of the main body The ion generator having a surface is formed such that a part of the main body protrudes to the outside of the blowout duct and the ion generation surface is located in the middle of the cross section in the direction perpendicular to the smooth surface inside the blowout duct. In this state, the connection port can be connected to the downstream end of the air conveyance duct by inserting it through an attachment hole having a size about the size of the air outlet provided in the ceiling wall.
[0013]
According to this configuration, in the bent portion of the blowout duct to which the ion generator is attached, the cross section in the direction perpendicular to the smooth surface is necessarily smaller than the cross section of the blowout outlet, and the main body of the attached ion generator is connected to the blowout duct. Even if it protrudes slightly to the outside, the blowout duct can be easily inserted from a hole of about the blowout opening provided on the wall surface.
[0014]
In this case, the distance from the opening to the ion generation surface can be varied by adjusting the insertion depth of the ion generator by inserting the ion generator through the opening provided in the smooth surface.
[0015]
Then, the positive and negative ions generated from the ion generator can be efficiently supplied to the living space by the air flow by positioning the ion generation surface at substantially the center of the cross section perpendicular to the smooth surface. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an air conditioning duct device according to the present invention.
[0017]
In FIG. 1, reference numeral 1 denotes an L-shaped outlet duct that is formed entirely of an insulator such as a resin and includes an outlet 2 that blows outside air (air) into a living space (for example, the interior of a house) 4 in which a human lives. is there. A pipe space 11 for various pipes is formed above the ceiling wall 5 of the living space 4, and a blower unit 6 is provided therein. The ceiling wall 5 is provided with a hole 12 having the same size as the periphery of the outlet 2 of the second outlet duct 1.
[0018]
The blower unit 6 includes an air conveyance duct 7, a filter 8, and a blower 9. The air carrying duct 7 is installed horizontally at a predetermined location in the piping space 11, the blowout duct 1 is connected to one end, and the air inlet 10 is provided to the other end. The filter 8 is attached to the air inlet 10 and removes dust and dirt contained in the outside air. The blower 9 is installed in the vicinity of the air inlet 10, and sucks outside air through the filter 8 and blows the sucked outside air to the air conveyance duct 7 and the blowout duct 1. The air conveying duct 7, the filter 8 and the blower 9 constitute a blowing means.
[0019]
The blowout duct 1 is a resin molded product formed in a shape bent into an L shape, and a connection port 3 is formed at an end portion on the opposite side of the blowout port 2. Although the operation | work which connects the blower duct 1 to the air conveyance duct 7 is performed from the living space 4 side, since the hole 12 of the ceiling wall 5 is only opened about the magnitude | size about the blower outlet 2, the connection port 3 faces upwards. The blowing duct 1 held in the pipe is laid down slightly and inserted from the hole 12, the direction of the blowing duct 1 is adjusted while looking into the piping space 11, and the connection port 3 is inserted into the downstream end of the air conveying duct 7.
[0020]
A portion (hereinafter referred to as a “bent portion”) 1x where the blowout duct 1 bends to the blowout port 2 side and the connection port 3 side is processed so as to have a smooth surface 1a on the outside. Thereby, in the bending part 1x of the blowing duct 1, the cross section of the direction orthogonal to the smooth surface 1a becomes necessarily smaller than the cross section of the blower outlet 2. Further, the smooth surface 1a has a predetermined angle of inclination with respect to the horizontal direction. Thereby, the air flow which collided with the smooth surface 1a rebounds to the advancing direction side, and a course can be bent smoothly.
[0021]
The smooth surface 1a is provided with a rectangular opening 1b. An ion generator 13 is inserted through the opening 1b, and the ion generator 13 is attached to the smooth surface 1a. Thereby, even if the main body 22 of the attached ion generator 13 protrudes somewhat to the outside of the blowout duct 1, the blowout duct 1 can be easily inserted from the hole 12 about the blowout opening 2 provided in the ceiling wall 5. Can do.
[0022]
FIG. 2 is a schematic perspective view of the ion generator 13. A rectangular opening is formed on the upper surface of the box-shaped main body 22, and a flat dielectric 23 is provided in the opening. The upper surface of the dielectric 23 coincides with the upper surface of the main body 22. The peripheral dimension of the main body 22 substantially matches the hole dimension of the opening 1b (see FIG. 1) of the blowout duct 1. Therefore, if the main body 22 of the ion generator 13 is inserted and attached to the opening 1b, the opening 1b is blocked by the periphery of the main body 22, so that the air flow flowing in the blowout duct 1 does not leak from the opening 1b.
[0023]
A high voltage pulse driving circuit 26 is accommodated in the lower part of the main body 22. A plate-like internal electrode 24 and a net-like external electrode 25 are disposed on the upper and lower surfaces of the dielectric 23 so as to face each other. The external electrode 25 is exposed to the outside from the upper surface of the main body 22. A high voltage pulse drive circuit 26 is connected to the internal electrode 24 and the external electrode 25 via a lead wire 27. When the high voltage pulse drive circuit 26 is driven, a high voltage pulse voltage consisting of a positive voltage and a negative voltage is applied between the internal electrode 24 and the external electrode 25, and plasma discharge occurs. As a result, the air around the external electrode 25 is ionized to generate approximately the same number of positive and negative ions.
[0024]
By applying an alternating high voltage between the electrodes, oxygen or moisture in the air is ionized by receiving energy by ionization, and H ⁺ (H ₂ O) _m (m is an arbitrary natural number) and O ₂ ⁻ Ions mainly composed of (H ₂ O) _n (n is an arbitrary natural number) are generated, and these are released into the space by a fan or the like. These H ⁺ (H ₂ O) _m and O ₂ ⁻ (H ₂ O) _n adhere to the surface of floating bacteria and chemically react to generate H ₂ O ₂ or .OH as an active species. Since H ₂ O ₂ or .OH exhibits a very strong activity, they can surround and inactivate airborne bacteria in the air. Here, .OH is one kind of active species, and represents radical OH.
[0025]
Positive and negative ions react chemically on the cell surface of airborne bacteria as shown in formulas (1) to (3) to generate hydrogen peroxide (H ₂ O ₂ ) or hydroxyl radical (.OH) as active species. To do. Here, in Formula (1)-Formula (3), m, m ', n, and n' are arbitrary natural numbers. Thereby, floating bacteria are destroyed by the action of decomposing active species. Therefore, airborne bacteria in the air can be inactivated and removed efficiently.
_{^{H + (H 2 O) m}} + O 2 - (H 2 O) n → · OH + 1 / 2O 2 + (m + n) H 2 O ··· (1)
H ⁺ (H ₂ O) _m + H ⁺ (H ₂ O) _{m ′} + O ₂ ⁻ (H ₂ O) _n + O ₂ ⁻ (H ₂ O) _{n ′} → 2 · OH + O ₂ + (m + m ′ + n + n ') H ₂ O (2)
H ⁺ (H ₂ O) _m + H ⁺ (H ₂ O) _{m ′} + O ₂ ⁻ (H ₂ O) _n + O ₂ ⁻ (H ₂ O) _{n ′} → H ₂ O ₂ + O ₂ + (m + m ′ + n + n ′) H ₂ O (3)
[0026]
By the above mechanism, the inactivation effect of the floating bacteria can be obtained by the release of the positive and negative ions.
[0027]
In addition, since the above formulas (1) to (3) can produce the same action even on the surface of harmful substances in the air, hydrogen peroxide (H ₂ O ₂ ) or hydroxyl radical (. OH) becomes substantially harmless by oxidizing or decomposing harmful substances and converting chemical substances such as formaldehyde and ammonia into harmless substances such as carbon dioxide, water and nitrogen.
[0028]
Therefore, by sending out positive and negative ions generated by the ion generator 13 to the living space 4 by the blower 9, it is possible to inactivate mold and fungi in the indoor atmosphere by the action of these positive and negative ions and suppress their growth. it can.
[0029]
In addition, positive and negative ions have a function to inactivate viruses such as influenza virus and coxsackie virus, and can prevent contamination due to contamination of these viruses.
[0030]
In addition, it has been confirmed that positive and negative ions have a function of decomposing molecules that cause odor, and can be used for deodorizing a space.
[0031]
The number of positive and negative ions sent out from the blowout port 2 is that the ion generation surface (that is, the surface of the dielectric 23) from the opening 1b of the blowout duct 1 when the ion generation amount of the ion generator 13 and the airflow of the blower 9 are constant. ) Depending on the distance x. This distance x can be varied by adjusting the insertion depth of the ion generator 13.
[0032]
FIG. 3 is a diagram showing an example of the relationship between the distance x from the opening 1b of the blowing duct 1 to the ion generation surface and the number of positive and negative ions. The experiment was performed under the conditions shown in FIG. That is, the blowout duct 1 having a blower outlet 2 side inner diameter of 78 mm, a connection port 3 side inner diameter of 47 mm, and a distance of 60 mm between the inner surfaces in the direction perpendicular to the smooth surface 1a through the center of the opening 1b was used. The number of ions was measured using an air ion counter manufactured by Dan Kagaku Co., Ltd., and measured at a point 100 mm away from the center of the end face of the air outlet 2 toward the living space 4 side.
[0033]
As shown in FIG. 3, the number of positive and negative ions increases as the distance x increases, and reaches a maximum at a position of x = 31 mm, which is substantially in the center of the cross section in the direction orthogonal to the smooth surface 1a. This is because the ion generation surface is furthest away from the inner surface of the blowout duct 1, so that the rate at which the generated positive and negative ions collide with the inner surface of the blowout duct 1 while being conveyed to the blowout port 2 by the air flow is the smallest. This is thought to be due to the reduction of loss.
[0034]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the loss of the number of positive / negative ions generated from the ion generator is small, and the air-conditioning duct apparatus which can supply the positive / negative ion generated from the ion generator to living space efficiently can be provided. In addition, it is possible to provide an air-conditioning duct device that can be easily attached and detached without disturbing the ion generator and that has high workability during maintenance and repair of the ion generator.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view of an air conditioning duct device according to the present invention.
FIG. 2 is a schematic perspective view of an ion generator.
FIG. 3 is a table (a) and a graph (b) showing an example of a relationship between an ion generator mounting position and an ion amount.
4 is a schematic cross-sectional view of an air conditioning duct device with dimension lines showing the experimental conditions of FIG. 3. FIG.
FIG. 5 is a schematic diagram of a conventional air conditioning duct device.
FIG. 6 is a schematic cross-sectional view of an air conditioning duct device showing a trajectory during duct installation work.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outlet duct 2 Outlet 3 Connection port 4 Living space 5 Ceiling wall 6 Blower unit 7 Air conveyance duct 8 Intake port 9 Blower 11 Piping space 12 Hole 13 Ion generator

Claims (3)

Bending of a blowout duct having a connection port connected to the downstream end of an air conveyance duct piped in an upper space of the ceiling wall and a blowout port disposed in the ceiling wall and formed into an L-shaped bent shape outside to form a smooth surface of the parts, the flat smooth surface, the ion generator to form an ion generating surface that generates positive and negative ions in the opening provided on one surface of the body has a box-shaped body, said body And the ion generating surface is provided on the ceiling wall in a state of being mounted so as to be located in the center of the cross section in the direction perpendicular to the smooth surface inside the blowing duct . An air conditioning duct device, wherein the connection port can be connected to a downstream end of an air conveyance duct by being inserted from a mounting hole having a size of a blower outlet.   The air-conditioning duct apparatus according to claim 1, wherein the ion generator is inserted and attached through an opening provided in the smooth surface. The positive and negative ions are H ⁺ (H ₂ O) _m (m is an arbitrary natural number) as positive ions and O ₂ ⁻ (H ₂ O) _n (n is an arbitrary natural number) as negative ions. The air-conditioning duct apparatus according to claim 1 or 2 .

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