JP7821057B2 - Ion emitter - Google Patents

Description

The present invention relates to an ion emission device.

Among the discharge products, ion generators that generate positive and negative ions are known. The ion discharge device described in Patent Document 1 includes an air duct that connects an air inlet and an air outlet, a blower fan that circulates air through the air duct, and an ion generator that emits positive and negative ions into the airflow flowing through the air duct.

JP 2015-75282 A

Increasing the ion concentration can improve the air purification effect. Furthermore, to improve the air purification effect, it is necessary to increase the ion balance between positive and negative ions. Meanwhile, a damper for adjusting the air volume is installed at the downstream end of the air conditioning duct. The damper changes the opening area at the downstream end of the duct. As a result, the damper has the function of adjusting the air flow. However, Patent Document 1 does not take into account the relationship between ion balance and the damper, that is, the effect of the damper on the ion balance.

The objective of the present invention is to provide an ion emission device that can improve air purification effects.

According to one aspect of the present invention, the air conditioner comprises a main body housing and an even number of discharge units. The main body housing blows out air through a damper that adjusts the air passage area downstream of the duct. The even number of discharge units are arranged inside the main body housing and each generates positive ions and negative ions. Furthermore, the even number of discharge units are arranged symmetrically with respect to the axis of the damper that straddles the air passage downstream of the duct.

The present invention provides an ion emission device that can improve air purification effects.

1 is a perspective view of an ion discharge device according to a first embodiment of the present invention. FIG. FIG. 2 is a cross-sectional view taken along line II-II shown in FIG. FIG. 2 is a cross-sectional view taken along line III-III shown in FIG. FIG. 2 is a front view of the main body housing with the blowout unit removed according to the first embodiment. FIG. 2 is a perspective view of a discharge unit according to the first embodiment. FIG. 10 is a front view of a main body housing from which a blowout unit according to a second embodiment of the present invention has been removed. FIG. 1 is a diagram showing the configuration of an experimental device for a first ion balance experiment. FIG. 10 is an explanatory diagram of measurement conditions for the first ion balance experiment. FIG. 2 is a diagram showing the positional relationship between a measurement object and a sensor. FIG. 10 is a diagram showing the positional relationship between another measurement target and a sensor. 1 shows the experimental results of the first ion balance experiment. FIG. 10 is a diagram showing the configuration of an experimental device for the second ion balance experiment. 10 shows the experimental results of the second ion balance experiment. 10 is a graph showing the experimental results of the second ion balance experiment. 10 shows the experimental results of the first ion concentration experiment. 10 shows the experimental results of the second ion concentration experiment. FIG. 10 is a perspective view of an ion discharge device according to a third embodiment of the present invention. 18 is a cross-sectional view taken along line XVIII-XVIII shown in FIG. 17. 18 is a cross-sectional view taken along line XIX-XIX shown in FIG. 17. FIG. 10 is an exploded perspective view of an ion discharge device according to a fourth embodiment of the present invention.

Embodiments of the present invention will be described with reference to the drawings. In the drawings, identical or corresponding parts are designated by the same reference numerals, and description will not be repeated. In the embodiments of the present invention, the X-axis, Y-axis, and Z-axis are mutually orthogonal, the X-axis and Y-axis are parallel to the horizontal plane, and the Z-axis is parallel to the vertical plane. The positive direction of the Z-axis indicates the downward direction. Note that, although the ion discharge device is typically installed facing downward, for ease of explanation, it is shown facing upward throughout the drawings.

(Embodiment 1)
First, an ion discharge device 100 according to the first embodiment will be described with reference to Fig. 1 to Fig. 5. Fig. 1 is a perspective view of the ion discharge device 100. Fig. 2 is a cross-sectional view taken along line II-II shown in Fig. 1. Fig. 3 is a cross-sectional view taken along line III-III shown in Fig. 1. Fig. 4 is a front view of the main body housing 10 with the blow-out unit 12 removed according to the first embodiment. Fig. 5 is a perspective view of the discharge unit 20 according to the first embodiment.

The ion discharge device 100 is applied, for example, to a duct-type air conditioner 1. Generally, the air conditioner 1 comprises a heat exchanger, a blower, an intake chamber, and an outlet chamber (all not shown). The heat exchanger, blower, intake chamber, and outlet chamber are all connected by ducts. Each component of the air conditioner 1 is installed above the ceiling. The air volume is adjusted by a damper. The air is sent from the blower. The air volume is adjusted according to the structure of the room and the installation position of the outlet chamber. After adjusting the air volume, the air is blown out from the outlet chamber into the room.

As shown in FIG. 1, the ion discharge device 100 is connected to the downstream end of the duct 2. The ion discharge device 100 is disposed on a wall portion. The wall portion constitutes the wall surface of the room. The wall portion is, for example, the ceiling wall of the room. Note that the ion discharge device 100 is not limited to being disposed on the ceiling wall, and may also be disposed on a side wall.

As shown in Figures 2 to 4, the ion emission device 100 includes a main body housing 10 and an even number of discharge units 20. The main body housing 10 includes a connection unit 11 and a blowout unit 12.

Duct 2 allows air to flow. Duct 2 extends parallel to the X-axis direction above the ceiling. Duct 2 curves in the Z-axis direction at its downstream end. Specifically, duct 2 extends horizontally and then curves downward at its downstream end. Note that for ease of explanation, duct 2 is shown upside down in Figure 1.

The blowing section 12 blows out the air that has flowed in from the duct 2. The blowing section 12 has a rectangular shape in a plan view. Specifically, it has a square shape. The blowing section 12 has four sides E1, E2, E3, and E4, and four corners C1, C2, C3, and C4. The blowing section 12 is divided into four sections S1, S2, S3, and S4. The four sections S1, S2, S3, and S4 are formed by equally dividing the two sides E1 and E3 that extend in the X-axis direction, and equally dividing the two sides E2 and E4 that extend in the Y-axis direction.

The first portion S1 is a square portion including the corner C1 side of the side E1 and the corner C1 side of the side E4. The second portion S2 is a square portion including the corner C2 side of the side E1 and the corner C2 side of the side E2. The third portion S3 is a square portion including the corner C3 side of the side E2 and the corner C3 side of the side E3. The fourth portion S4 is a square portion including the corner C4 side of the side E3 and the corner C4 side of the side E4.

The blowout section 12 includes a plurality of guide sections 121. As shown in FIG. 3, the plurality of guide sections 121 have an intersection angle θ1 with respect to the Z axis. The intersection angle θ1 is an angle ranging from 35° to 55°. Preferably, the intersection angle θ1 is 45°. Each of the plurality of guide sections 121 is approximately perpendicular to the diagonal line of the blowout section 12.

In the first section S1, the wind flowing from the openings of the multiple guide sections 121 is directed toward corner C1. In the second section S2, the wind flowing from the openings of the multiple guide sections 121 is directed toward corner C2. In the third section S3, the wind flowing from the openings of the multiple guide sections 121 is directed toward corner C3. In the fourth section S4, the wind flowing from the openings of the multiple guide sections 121 is directed toward corner C4. Therefore, the multiple guide sections 121 guide the wind inside the main body housing 10 toward corner C1, corner C2, corner C3, and corner C4, respectively. In other words, the blower section 12 is a multi-wind direction blower. Therefore, wind can be sent in all directions of the ion emitter 100.

The connection portion 11 includes a connection plate 111. The connection plate 111 has a rectangular shape. Specifically, it has a square shape. The connection plate 111 faces the blowing portion 12. The connection portion 11 has a cylindrical shape. The connection portion 11 is connected to the connection plate 111 via an opening 11a. The opening 11a is located at the center of the connection plate 111. In other words, the connection plate 111 extends radially outward from the opening 11a of the connection portion 11.

The connection portion 11 further includes a damper 13. The damper 13 adjusts the air passage area downstream of the duct 2. In other words, it adjusts the air passage area of the connection portion 11. Therefore, the damper 13 adjusts the amount of air flowing into the main body housing 10.

As shown in Figures 2 to 4, the damper 13 comprises a shaft portion 131 and a valve body 132. The shaft portion 131 spans the downstream air passage of the duct 2 in the diameter direction. Specifically, the shaft portion 131 is fixed to one end and the other end of the connection portion 11 in the first direction D1. The first direction D1 is parallel to the X-axis direction and indicates the direction from the blower toward the main body housing 10. Therefore, the first direction D1 indicates the direction in which the shaft portion 131 extends.

The valve body 132 has a circular shape. The valve body 132 has approximately the same diameter as the opening 11a of the connection portion 11. When the valve is closed, one half of the valve body 132 in the second direction D2 has a semicircular shape. When the valve is closed, the other half of the valve body 132 in the second direction D2 has a semicircular shape.

As shown by the two-dot chain line in Figure 2, the valve body 132 is in a closed state when it is expanded in the second direction D2 around the shaft portion 131. When both halves of the valve body 132 are bent in the Z-axis direction, it is in an open state. As shown in Figure 2, in this embodiment 1, the valve body 132 is in an open state toward the downstream side of the duct 2.

Next, the discharge units 20 will be described. An even number of discharge units 20 are arranged inside the main body housing 10. Specifically, four discharge units 20 are arranged. The even number of discharge units 20 generate positive ions and negative ions.

As shown in FIG. 5, the discharge unit 20 has a pair of electrodes formed on a circuit board (not shown). The pair of electrodes is a positive electrode 201 and a negative electrode 202. A pair of protective members (not shown) may be provided around the positive electrode 201 and the negative electrode 202 to prevent contact with the positive electrode 201 and the negative electrode 202. The configuration of the discharge unit 20 is well-known technology, so a detailed description will be omitted.

The discharge unit 20 is capable of generating a discharge factor. Examples of the discharge factor include ions. The ions include positive ions (e.g., H ⁺ (H ₂ O) _m (m is any integer)), negative ions (e.g., O ₂ ⁻ (H ₂ O) _n (n is any integer)), or a combination thereof.

The discharge unit 20 generates positive ions and negative ions. The positive electrode 201 and negative electrode 202 of the discharge unit 20 are, for example, brush-like electrodes. The pair of positive electrode 201 and negative electrode 202 are connected to a circuit board. When a high voltage is applied to the pair of positive electrode 201 and negative electrode 202, a corona is generated. As a result, each of the pair of positive electrode 201 and negative electrode 202 discharges and generates positive ions and negative ions.

An even number of discharge units 20 are arranged symmetrically with respect to the shaft 131 of the damper 13. Therefore, it is possible to avoid variations in the concentrations of positive and negative ions compared to when they are not arranged symmetrically with respect to the shaft 131 of the damper 13. As a result, the ion balance is improved. This point has been verified by the verification experiment described below.

As shown in FIG. 4, the four discharge units 20 are arranged along the opening 11a of the connection unit 11. Two of the four discharge units 20 face the first direction D1. The first direction D1 indicates the direction in which the shaft unit 131 extends. Two of the four discharge units 20 are arranged symmetrically on the extension line of the shaft unit 131 with respect to the center 131a of the shaft unit 131 in the first direction D1.

The other two of the four discharge units 20 face the second direction D2. The second direction D2 is perpendicular to the first direction D1. The other two of the four discharge units 20 are arranged symmetrically with respect to the center 131a of the shaft 131 in the first direction D1. Therefore, at least compared to when the four discharge units 20 are not arranged symmetrically with respect to the shaft 131 of the damper 13, variations in the concentrations of positive and negative ions can be further prevented. As a result, the ion balance is improved. In other words, the air purification effect can be improved. This point has been demonstrated by the verification experiment described below.

In each discharge unit 20, a pair of positive and negative electrodes 201 and 202 protrude from the opening 11a of the connection unit 11 toward the center of the opening 11a. In other words, the pair of positive and negative electrodes 201 and 202 protrude from the inner surface of the duct 2. Therefore, the positive and negative electrodes 201 and 202 are reliably exposed to the wind from the duct 2. As a result, the ion concentration can be increased.

The four discharge units 20 are arranged at equal intervals along the opening 11a of the connection unit 11. This ensures sufficient spacing between adjacent discharge units 20 along the opening 11a of the connection unit 11. As a result, mixing of positive and negative ions can be suppressed. Furthermore, the positive electrodes 201 and negative electrodes 202 are arranged alternately along the opening 11a of the connection unit 11. As a result, mixing of positive and negative ions can be further suppressed. This improves the air purification effect.

(Embodiment 2)
Next, an ion discharge device 100A according to a second embodiment of the present invention will be described with reference to Fig. 6. The ion discharge device 100 according to the first embodiment includes four discharge units 20. Two of the four discharge units 20 face the first direction D1. On the other hand, the ion discharge device 100A according to the second embodiment includes four discharge units 20. Two of the four discharge units 20 face the third direction D3 that intersects the extension direction of the shaft unit 131 at an acute angle θ2. Fig. 6 is a front view of the main body housing 10A according to the second embodiment from which the blowout unit 12 has been removed.

As shown in FIG. 6, the ion discharge device 100A has four discharge units 20. Two of the four discharge units 20 face the third direction D3. The third direction D3 intersects with the extension direction of the shaft portion 131 at an acute angle θ2. Two of the four discharge units 20 are arranged symmetrically with respect to the center 131a of the shaft portion 131 in the first direction D1.

The other two of the four discharge units 20 face the fourth direction D4. The fourth direction D4 intersects the first direction D1 and the third direction D3. The other two of the four discharge units 20 are arranged symmetrically with respect to the center 131a of the shaft 131 in the first direction D1. In other words, the four discharge units 20 are arranged symmetrically with respect to the shaft 131 of the damper 13. Therefore, at least compared to when the four discharge units 20 are not arranged symmetrically with respect to the shaft 131 of the damper 13, the variation in the concentrations of positive and negative ions is suppressed. As a result, the ion balance is improved. This point has been demonstrated by the verification experiments described below.

(Verification experiment)
Next, a verification experiment to verify the effects will be described. The first ion balance experiment will be described with reference to FIGS. 7 to 11. FIG. 7 is a configuration diagram of the experimental equipment used in the first ion balance experiment. FIG. 8 is an explanatory diagram of the measurement conditions for the first ion balance experiment. FIG. 9 is a diagram showing the positional relationship between the ion discharge device 100, which is the measurement target M1, and a sensor. FIG. 10 is a diagram showing the positional relationship between the ion discharge device 100A, which is another measurement target M2, and a sensor. FIG. 11 shows the experimental results of the first ion balance experiment. Note that the measurement target M1 has the same configuration as the ion discharge device 100, and therefore will be described using the same reference numerals as the ion discharge device 100. Furthermore, the other measurement target M2 has the same configuration as the ion discharge device 100A, and therefore will be described using the same reference numerals as the ion discharge device 100A.

As shown in Figures 7 and 8, the first ion balance experiment is conducted on measurement objects M1 and M2 using a first experimental device L1. In the first ion balance experiment, ion concentrations are measured at positions close to the measurement objects. Ion concentrations are measured at three different measurement positions. Ion concentrations are measured using an ion counter MY1210 series (manufactured by Technonix) ion counter.

The first experimental apparatus L1 comprises a base 50 and an ion measuring instrument 60. As shown in FIG. 7, the base 50 supports a pair of frames 51. The pair of frames 51 are spaced a predetermined distance from the floor. The pair of frames 51 support the ion emission device 100 from below when the ion emission device 100 is being measured.

As shown in FIG. 8, the ion measuring device 60 is disposed near the outer edge of the blowing section 12. Specifically, measurement position A is near corner C2, and measurement position B is near corner C1. Measurement position C is near the center of side E1 in the first direction D1. The ion measuring device 60 at measurement position A faces the wind from portion S2. The ion measuring device 60 at measurement position B faces the wind from portion S1. The ion measuring device 60 at measurement position C faces part of the wind from portion S1 and part of the wind from portion S2.

As shown in FIG. 9 , the shaft 131 extends along the first direction D1. The duct 2, like the shaft 131, also extends along the first direction D1. When measuring the measurement object M1, the ion measuring device 60 at measurement position C is close to the discharge unit 20. Two discharge units 20 are off the path of the wind facing the ion measuring device 60 at measurement position A. Furthermore, two other discharge units 20 are off the path of the wind facing the ion measuring device 60 at measurement position B.

As shown in FIG. 10, the shaft 131 extends along the first direction D1. The duct 2, like the shaft 131, also extends along the first direction D1. When measuring the measurement object M2, the two discharge units 20 are arranged on the path of the wind facing the ion measuring device 60 at measurement position A. In other words, the discharge units 20 are arranged on an extension of the fourth direction D4. Furthermore, two other discharge units 20 are arranged on the path of the wind facing the ion measuring device 60 at measurement position B. In other words, the discharge units 20 are arranged on an extension of the third direction D3.

Next, the results of the first ion balance experiment will be described. The positive ions and negative ions are the numbers of ions present in 1 ^cm3 . The ion balance is the value obtained by dividing the number of negative ions by the number of positive ions.

As shown in Figure 11, the ion balance of measurement object M1 and measurement object M2 is lower than 2.0, which is a good value. When the ion balance value is lower than 2.0, there is a high air purification effect.

For both measurement object M1 and measurement object M2, the ion concentration at measurement position A, where the wind flow velocity is high, is higher than the ion concentration at measurement position B, where the wind flow velocity is low. Furthermore, the ion concentration is higher in the areas facing the wind, i.e., measurement positions A and B, than in the area not facing the wind, i.e., measurement position C. Therefore, near the air outlet 12, both measurement object M1 with a cross-shaped layout and measurement object M2 with an X-shaped layout have a high air purification effect.

Next, the second ion balance experiment will be described with reference to Figures 12 to 14. Figure 12 is a diagram of the experimental equipment used in the second ion balance experiment. Figure 13 shows the results of the second ion balance experiment. Figure 14 is a graph of the results of the second ion balance experiment.

The second ion balance experiment is conducted on measurement targets M1 and M2 using a second experimental device L2. In the second ion balance experiment, ion concentrations are measured at positions separated from the measurement targets. The ion concentrations are measured at six different horizontal measurement positions. The ion measuring device 60 is the same as the ion measuring device used in the first ion balance experiment.

As shown in FIG. 12, the ion measuring device 60 is positioned at a distance from the blowout section 12. Specifically, the ion measuring device 60 is positioned 50 cm away from the center of the side E1 in the first direction D1 in the second direction D2 and 35 cm away in the Z-axis direction (upward). The ion measuring device 60 then moves in the opposite direction to the first direction D1 at 10 cm intervals until it is 50 cm away. The ion measuring device 60 measures the ion balance at each 10 cm interval it moves.

Next, the results of the second ion balance experiment will be described with reference to Figures 13 and 14. As shown in Figures 13 and 14, the ion balance of measurement object M1 is closer to 1 than the ion balance of measurement object M2 in terms of average, maximum, and minimum values. In particular, when the ion measuring device 60 is moved up to 50 cm in the direction opposite to the first direction D1, the difference in ion balance between measurement object M1 and measurement object M2 is significant. In other words, the difference in ion balance performance between measurement object M1 and measurement object M2 becomes greater the further away from the measurement object M1 is.

The standard deviation of the ion balance of measurement object M1 is 0.25, and the standard deviation of the ion balance of measurement object M2 is 0.40. Therefore, the ion balance of measurement object M1 is more stable than the ion balance of measurement object M2. Therefore, the ion balance of measurement object M1 is more stable than that of measurement object M2, and is closer to 1.

Next, the results of the first and second ion concentration experiments will be explained. For the measurement object M1, the ion concentration in an isothermal state, the ion concentration in a cooling state, the cooling ratio, and the airflow ratio were measured. Eight measurement objects M1 were installed. The ion concentration measurement heights were equivalent to 0.8 m, 1.2 m, and 1.5 m from the floor. Specifically, four measurement objects M1 were installed on one surface (11 m x 7.7 m). For each measurement height, 10 uniform points were selected from the measurement object M1 and measurements were taken.

The results of the first ion concentration experiment will be described. In the first ion concentration experiment, the air volume per unit was 120 ^m3 per hour. As shown in FIG. 15, the average ion concentration in the isothermal state was 11,762 ions/ ^cm3 , and the minimum ion concentration was 6,607 ions/ ^cm3 . The average ion concentration in the cooling state was 21,655 ions/ ^cm3 , and the minimum ion concentration was 20,000 ions/ ^cm3 . Except for the area equivalent to 0.8 m in the isothermal state, the ion concentration exceeded 7,000 ions/ ^cm3 . The average cooling ratio, which is the ratio of the ion concentration in the cooling state to the ion concentration in the isothermal state, was 184%. Therefore, the measurement object M1 has an air purification effect in terms of ion concentration.

The results of the second ion concentration experiment will now be described. In the second ion concentration experiment, the air volume per unit was 240 ^m3 per hour. As shown in FIG. 16 , the average ion concentration in the cooling state was 37,571 ions/ ^cm3 , and the minimum ion concentration was 33,714 ions/ ^cm3 . The average air volume ratio, which is the ratio of the ion concentration at an air volume of 240 ^m3 per hour to the ion concentration at an air volume of 120 ^m3 per hour, was 174%. Therefore, the ion discharge device 100 has an air purification effect in terms of ion concentration.

(Embodiment 3)
Next, an ion discharge device 100B according to a third embodiment of the present invention will be described with reference to Figs. 17 to 19. Fig. 17 is a perspective view of the ion discharge device 100B. Fig. 18 is a cross-sectional view taken along line XVIII-XVIII shown in Fig. 17. Fig. 19 is a cross-sectional view taken along line XIX-XIX shown in Fig. 17. The ion discharge device 100 of the first embodiment includes four discharge units 20. The discharge units 20 are arranged in a cross shape. The blowing unit 12 is a multi-wind direction type blowing unit. On the other hand, the ion discharge device 100B of the second embodiment includes four discharge units 20. The discharge units 20 are arranged in a cross shape. The blowing unit 12B is a multi-layer cone type blowing unit.

As shown in Figures 17 to 19, the ion emission device 100B includes a main body housing 10B and a discharge unit 20. The main body housing 10B has a rectangular parallelepiped shape. The main body housing 10B includes a connection unit 11 and a blowout unit 12B. The connection unit 11 is connected to a duct 2. The blowout unit 12B blows air from the duct 2 to the outside of the main body housing 10B.

Blowout section 12B has a rectangular shape. Specifically, blowout section 12B has a pair of long sides E5 and E7 extending in the first direction D1. Blowing section 12B has a pair of short sides E6 and E8 extending in the second direction D2. Corner C5 is located at the junction of short side E8 and long side E5. Corner C6 is located at the junction of long side E5 and short side E6. Corner C7 is located at the junction of short side E6 and long side E7. Corner C8 is located at the junction of long side E7 and short side E8.

The air outlet section 12B includes an airflow direction changing plate 122 and multiple guide plates 121B. The airflow direction changing plate 122 faces the opening 11a of the connection section 11. The multiple guide plates 121B are arranged along the corresponding sides. Therefore, in the guide plate 121B corresponding to the long side E5, the air flowing from the opening is directed toward the long side E5. In the guide plate 121B corresponding to the short side E6, the air flowing from the opening is directed toward the short side E6. In the guide plate 121B corresponding to the long side E7, the air flowing from the opening is directed toward the long side E7. In the guide plate 121B corresponding to the short side E8, the air flowing from the opening is directed toward the short side E8.

The four discharge units 20 are arranged corresponding to the centers of each side. Long side E5 and long side E7 each have a protrusion 14 that protrudes inward from the side of the main housing 10B. The protrusion 14 has a surface facing the opening 11a of the connection unit 11. The discharge units 20 corresponding to long side E5 and long side E7 are attached to the surface facing the opening 11a of the connection unit 11. The discharge units 20 corresponding to short side E6 and short side E8 are attached to the side of the main housing 10B.

The four discharge parts 20 each have a positive electrode 201 and a negative electrode 202. The positive electrode 201 and negative electrode 202 protrude toward the center of the opening 11a. The four discharge parts 20 are positioned at a distance from the opening 11a of the connection part 11.

Wind flows into the main body housing 10B through the opening 11a. The incoming wind travels toward the wind direction changing plate 122. The wind direction is changed horizontally by the wind direction changing plate 122. Before or after the direction is changed, ions are supplied to the wind by the discharge unit 20. The ion-supplied wind is guided to the four sides by multiple guide units 121B. The wind is released from the openings in the guide units 121B in directions perpendicular to each side. An even number of discharge units 20 are provided, which generate positive and negative ions. The even number of discharge units 20 are arranged symmetrically with respect to the axis 131 of the damper 13. Therefore, variations in the concentrations of positive and negative ions can be avoided compared to when the discharge units 20 are not arranged symmetrically with respect to the axis 131 of the damper 13. As a result, ion balance is improved. This point was inferred from the verification experiment described above. Furthermore, the two discharge units 20 do not need to be arranged on an extension of the shaft 131 of the damper 13; at least an even number of discharge units 20 need only be arranged symmetrically with respect to the shaft 131 of the damper 13.

(Embodiment 4)
Next, an ion discharge device 100C according to a fourth embodiment of the present invention will be described with reference to Fig. 20. Fig. 20 is an exploded perspective view of the ion discharge device 100C according to the fourth embodiment.

The ion emission device 100C comprises a main body housing 10C and an even number of discharge units 20. The main body housing 10 comprises a connection unit 11, a blowout unit 12, and a panel 30. The panel 30 is attached to the inside of the main body housing 10C. Specifically, the panel 30 is fixed to a connection plate 111.

The panel 30 has an opening 30a. The opening 30a has approximately the same diameter as the opening 11a of the connection portion 11. The panel 30 is attached to the inside of the main body housing 10C. Specifically, the panel 30 is fixed by overlapping the opening 30a with the opening (opening 11a) of the connection plate 111.

The panel 30 is equipped with four mounting brackets 31. The four mounting brackets 31 are arranged along the outer periphery of the opening 30a. In this embodiment, the four mounting brackets 31 are arranged at 90° intervals.

The mounting brackets 31 secure the discharge units 20. Therefore, four discharge units 20 can be attached to the panel 30 in advance. As a result, during maintenance, the panel 30 with the four discharge units 20 attached can be easily attached inside the main body housing 10C. In other words, this saves time and effort compared to attaching the discharge units 20 individually. This improves workability during maintenance.

Embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments and can be implemented in various forms without departing from the spirit of the present invention. Furthermore, various inventions can be created by appropriately combining multiple components disclosed in the above embodiments. For example, some components may be omitted from all components shown in the embodiments. The drawings mainly show each component diagrammatically to make them easier to understand, and the number of each component shown may differ from the actual number due to the convenience of creating the drawings. Furthermore, the components shown in the above embodiments are merely examples and are not particularly limited, and various modifications are possible within a scope that does not substantially deviate from the effects of the present invention.

For example, in the embodiment, an example in which four discharge units 20 are arranged in the main body housing has been described, but this is not limited to this. At least an even number of discharge units 20 is sufficient, and two discharge units 20 are also acceptable. In the case of two discharge units 20, they may be arranged line-symmetrically with respect to the shaft 131, or they may be arranged on an extension of the shaft 131. Furthermore, there may be six or more discharge units 20.

In addition, in the embodiment, examples of a multi-wind direction blowing unit that blows toward the four corners and a multi-layer cone type blowing unit that blows toward the four sides have been described, but this is not limited to this. It may be applied to a multi-wind direction blowing unit that blows toward the four sides, or to a multi-layer cone type blowing unit that blows toward the four corners. It may also be applied to a blowing unit that has both a portion that blows toward the corners and a portion that blows toward the sides.

Furthermore, in the embodiment, an example has been described in which the valve body 132 is in a closed state, in other words, the opening 11a is substantially fully open, but this is not limited to this. It can also be applied when the damper 13 adjusts the air volume to a predetermined level.

The present invention can be used in the field of ion emission devices.

2 Duct 10, 10A, 10B Main body housing 11 Connection portion 11a Opening 12 Blowing portion 13, 131 Damper 30 Panel 100, 100A, 100B, 100C Ion discharge device 121, 121A, 121B Guide plate 122 Air direction changing plate 201 Positive electrode 202 Negative electrode

Claims (9)

a main body housing that blows out air through a damper that adjusts the air passage area downstream of the duct;
an even number of discharge units disposed inside the main body housing, each generating positive ions and negative ions;
The ion discharge device, wherein the even number of discharge units are arranged symmetrically with respect to an axis of the damper that spans an air passage downstream of the duct. the even number of discharge parts is at least four discharge parts,
two of the four discharge parts face each other in a first direction indicating a direction in which the shaft part extends, and are arranged symmetrically with respect to a center of the shaft part in the first direction on an extension line of the shaft part;
The ion discharge device according to claim 1 , wherein the other two discharge parts of the four discharge parts face each other in a second direction perpendicular to the first direction and are arranged symmetrically with respect to the center of the shaft part in the first direction. the even number of discharge parts is at least four discharge parts,
two of the four discharge parts face each other in a third direction intersecting at an acute angle with the direction in which the shaft part extends, and are arranged symmetrically with respect to a center of the shaft part in the first direction, the first direction indicating the direction in which the shaft part extends;
The ion discharge device according to claim 1 , wherein the other two discharge parts of the four discharge parts face each other in a fourth direction intersecting the third direction, and are arranged symmetrically with respect to the center of the shaft part in the first direction. Each of the even number of discharge units includes a discharge electrode,
The ion discharge device according to claim 1 , wherein the discharge electrode protrudes from an inner surface of the duct. the main body housing includes a connection portion connected to the duct,
The ion discharge device according to claim 1 , wherein the even number of discharge parts are arranged at equal intervals along the opening of the connection part. the main body housing includes a connection portion connected to the duct,
The discharge unit is
a positive electrode that generates positive ions;
a negative electrode that generates negative ions,
The ion discharge device according to claim 1 , wherein in the even number of discharge parts, the positive electrodes and the negative electrodes are alternately arranged along the opening of the connection part. The main body housing includes:
a connection portion connected to the duct;
a blowing section that blows the air from the duct to the outside of the main body housing,
The blowout portion has a rectangular shape,
the blowout unit includes a plurality of guide plates that guide the airflow that has passed through the discharge unit toward four corners of the rectangular shape,
The ion discharge device according to claim 1 , wherein the even number of discharge parts are arranged along an opening of the connection part. The main body housing includes:
a connection portion connected to the duct;
a blowing section that blows the air from the duct to the outside of the main body housing,
The blowout portion has a rectangular shape,
The blowout unit is
an airflow direction changing plate that changes the direction of the airflow when the airflow from the duct hits it;
a plurality of guide plates that guide the air whose flow direction has been changed to the four sides of the rectangular shape,
The plurality of guide plates are arranged around the airflow direction changing plate,
The ion discharge device according to claim 1 , wherein the even number of discharge units are arranged corresponding to an outer edge of the guide plate. the main body housing further includes a panel attached to an interior of the main body housing;
The ion discharge device according to claim 1 , wherein an even number of the discharge units are fixed to the panel.