Ion generator

Abstract

Provided is an ion generator capable of increasing the amount and efficiency of ion generation. 【Solution means】The ion generator includes an ion generation unit having an ion generation surface, a housing having a gas inlet and outlet, and a discharge chamber provided in a region between the inlet and the outlet, and the inlet has a shape in which the opening area of the upstream opening end is larger than the opening area of the downstream opening end. Further, the outlet has a shape in which the opening area of the upstream opening end is larger than the opening area of the downstream opening end.

Description

Technical Field

[0001] The present invention relates to an ion generator.

Background Art

[0002] Conventionally, an ozone generator using a plate-shaped piezoelectric transformer capable of surface discharge has been known (Patent Document 1, etc.). The ozone generator of Patent Document 1 is configured to generate ozone by bringing oxygen in the surrounding air into contact with a discharge field by surface discharge of a piezoelectric transformer.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The ozone generator of Patent Document 1 can be miniaturized by using a plate-shaped piezoelectric transformer. However, on the other hand, there is a problem that the contact area between the discharge field and the surrounding air is narrow and the ozone generation efficiency is low.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide an ion generator capable of increasing the amount and efficiency of ion generation.

Means for Solving the Problems

[0006] The ion generator according to the present invention includes an ion generation unit having an ion generation surface, a housing having a gas inlet and an outlet, and a discharge chamber provided in a region between the inlet and the outlet, wherein the inlet has a shape in which an opening area of an upstream opening end is larger than an opening area of a downstream opening end.

[0007] In the ion generator according to the present invention, it is preferable that the outlet has a shape in which the opening area of the upstream opening end is larger than the opening area of the downstream opening end.

[0008] Further, it is preferable that the ion generator according to the present invention further includes intake means connected to the outlet of the housing.

[0009] Furthermore, it is preferable that the ion generator according to the present invention further includes a blower unit that blows air into the housing.

[0010] Also, it is preferable that the ion generator according to the present invention further includes a heat dissipation part provided in the housing, and the blower unit is configured to blow air to the heat dissipation part as well.

[0011] Furthermore, it is preferable that the ion generator according to the present invention further includes a case capable of accommodating the housing and the heat dissipation part, and the case has a discharge port for discharging the air that has passed through the heat dissipation part.

[0012] Also, in the ion generator according to the present invention, it is preferable that the blower unit is arranged at the inlet of the case.

[0013] Furthermore, in the ion generator according to the present invention, the ion generation part is configured to be capable of generating at least ozone, and it is preferable that the ion generator further includes an ozone supply part for supplying the generated ozone into water.

Advantages of the Invention

[0014] According to the ion generator of the present invention, it is possible to increase the amount of ions generated and the generation efficiency.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

[0016] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Note that the following embodiments do not limit the invention according to each claim, and not all combinations of the features described in the embodiments are essential for the solution means of the invention. Also, in this embodiment, there are cases where the scales and dimensions of each component are exaggeratedly shown, or some components are omitted.

[0017] [Overall Configuration of Ion Generator] As shown in FIGS. 1 and 2, the ion generator 1 according to this embodiment includes a device body 10 capable of generating ions, a heat dissipation part 30 provided in the device body 10, a case 40 capable of accommodating the device body 10 and the heat dissipation part 30, and a blower part 50 provided in the case 40. Further, the ion generator 1 according to this embodiment further includes intake means (not shown) directly or indirectly connected to the outlet 24 of the housing 20 of the device body 10 described later.

[0018] [Configuration of Device Body] As shown in FIGS. 1 to 3, the device body 10 includes an ion generation part 12 having an ion generation surface 14, a power supply part 16 that applies a voltage to the ion generation part 12, a connection part 18 that electrically connects the ion generation part 12 and the power supply part 16, and a housing 20 that houses the ion generation part 12.

[0019] The ion generation unit 12 is formed in a block shape, and its upper surface is configured to function as an ion generation surface 14. The ion generation surface 14 is disposed in a state of being exposed in a discharge chamber 26 (to be described later) of the housing 20, and is configured to be capable of generating surface discharge by the electric power supplied from the power supply unit 16 via the connection portion 18.

[0020] In the present embodiment, the ion generation unit 12 is configured to be capable of generating ozone. Specifically, the ion generation unit 12 generates surface discharge when a DC voltage is input, and by bringing the discharge field of the surface discharge into contact with oxygen in the air in the housing 20, it is possible to employ a small ozone generator capable of generating about 30 mg to 80 mg (average 45 mg) of ozone per hour. However, the ion generation unit 12 is not limited to this as long as it has a configuration having an ion generation surface 14, and various known configurations can be adopted. Further, the ion generation unit 12 may be configured to be capable of generating, in addition to ozone, for example, oxygen cluster ions or the like.

[0021] The power supply unit 16 is configured to boost a DC input voltage. Further, the connection portion 18 includes a high-voltage wire 18a that connects the power supply unit 16 and the input electrode of the ion generation unit 12, and a ground wire 18b that connects the power supply unit 16 and the ground electrode of the ion generation unit 12. One end of each of the high-voltage wire 18a and the ground wire 18b is connected to the ion generation unit 12 in the housing 20, and the other end is connected to the power supply unit 16 provided outside the housing 20. Further, each of the high-voltage wire 18a and the ground wire 18b has flexibility. With such a configuration, the apparatus main body 10 according to the present embodiment is configured to be capable of disposing the ion generation unit 12 and the power supply unit 16 at separated positions.

[0022] As shown in FIG. 3, the housing 20 is formed in a box shape made of an insulating material, and has a gas (air) inlet 22 and outlet 24, and a discharge chamber 26 provided in a region between the inlet 22 and the outlet 24.

[0023] Specifically, as shown in FIGS. 3 and 4, the housing 20 has a long rectangular upper surface 20a, a lower surface 20b, and a pair of side surfaces 20c, 20d, a front end surface 20e covering one end of the cylindrical body formed by these upper surface 20a, lower surface 20b, and a pair of side surfaces 20c, 20d, and a rear end surface 20f covering the other end. And a discharge chamber 26 is formed by these upper surface 20a, lower surface 20b, a pair of side surfaces 20c, 20d, front end surface 20e, and rear end surface 20f.

[0024] A recess capable of placing the base 32a of the upper heat dissipation part 32 described later is formed on the upper surface 20a of the housing 20, and a recess capable of placing the base 34a of the lower heat dissipation part 34 described later is formed on the lower surface 20b of the housing 20. One or a plurality (two in the front and rear in the illustrated example) of locking protrusions 29 that can be inserted into the guide cutouts 46 of the case 40 described later are provided protruding on the outer surfaces of the pair of side surfaces 20c, 20d, respectively. Also, connection through holes 28a, 28b (see FIG. 2) for passing the high-voltage wire 18a and the ground wire 18b are formed in one side surface 20c of the housing 20. An inlet 22 for taking air into the discharge chamber 26 is formed on the front end surface 20e of the housing 20, and an outlet 24 for discharging the gas (such as ozone) in the discharge chamber 26 to the outside is formed on the rear end surface 20f of the housing 20. Incidentally, openings may be formed on the upper surface 20a and the lower surface 20b of the housing 20 to expose a part (bases 32a, 34a) of the heat dissipation part 30 into the discharge chamber 26.

[0025] The discharge chamber 26 has a size capable of accommodating the ion generation part 12, and the ion generation part 12 is accommodated such that the ion generation surface 14 is exposed on the flow path from the inlet 22 to the outlet 24.

[0026] The inlet 22 is a through-hole formed in the front end face 20e of the housing 20, and is formed above the middle part in the vertical direction of the front end face 20e. Specifically, the inlet 22 is formed at a position opening toward the region between the upper surface 20a and the ion generation surface 14. The inlet 22 has a horizontally long shape in which the lateral width is larger than the vertical height from the viewpoint of taking in a large amount of air into the discharge chamber 26.

[0027] Also, as shown in FIGS. 3 and 4, the inlet 22 has a shape in which the opening area of the upstream opening end (the front opening end 22a) is larger than the opening area of the downstream opening end (the rear opening end 22b). Thereby, the housing 20 can increase the flow velocity at the inlet 22 and take in a large amount of air into the housing 20.

[0028] Specifically, the inlet 22 has an inclined surface 22c inclined inward from the front opening end 22a toward the rear opening end 22b, and has a shape in which the diameter gradually decreases from the front opening end 22a toward the rear opening end 22b. The inclined surface 22c is preferably a smooth curved surface from the viewpoint of suppressing air resistance. Also, the opening area of the front opening end 22a of the inlet 22 is preferably 120% or more, more preferably 150% or more, and still more preferably 200% or more of the opening area of the rear opening end 22b, but is not limited thereto.

[0029] The outlet 24 is formed in a cylindrical shape extending outward from the rear end face 20f of the housing 20, and is configured to discharge the entire amount of gas (such as ozone) in the discharge chamber 26 to the outside. As shown in FIG. 3, the outlet 24 has a shape in which the opening area of the upstream opening end (the front opening end 24a on the discharge chamber 26 side) is larger than the opening area of the downstream opening end (the rear opening end 24b on the outside). Thereby, the housing 20 can increase the flow velocity from the outlet 24 to promote exhaust, quickly send out a large amount of air outside the housing 20, and attract the intake of fresh air from the inlet 22.

[0030] Specifically, the outlet 24 has an inclined surface 24c that slopes inward from the front end 24a of the opening toward the rear end 24b of the opening, and has a shape that gradually decreases in diameter locally from the front end 24a of the opening toward the rear end 24b. The inclined surface 24c is preferably a smooth curved surface from the viewpoint of suppressing air resistance. Also, the opening area of the front end 24a of the outlet 24 is preferably 105% or more, more preferably 110% or more, but not limited to this, of the opening area of the rear end 24b of the opening.

[0031] As shown in FIG. 3, the ion generator 1 according to the present embodiment further includes an ozone supply unit (not shown) that supplies the generated ozone into water. In the present embodiment, the ozone supply unit includes a gas-liquid mixing member (not shown) that mixes the entire amount of the gas (ions, etc.) flowing out from the housing 20 with a liquid and sends it out to a water tank (not shown) such as a storage tank or a biological treatment tank, and a tubular member 68 such as a tube that connects the outlet 24 of the housing 20 and the gas-liquid mixing member. Note that the ion generator 1 may further include a connecting member (not shown) that connects a liquid supply source (not shown), a storage tank, etc. and the gas-liquid mixing member.

[0032] The gas-liquid mixing member includes a gas supply port to which the entire amount of the gas flowing out from the housing 20 is supplied, a liquid supply port to which the liquid is supplied, and a mixed liquid discharge port that discharges an ion mixed liquid in which the gas and the liquid are mixed. The gas-liquid mixing member is a so-called Venturi tube having a constricted portion between the liquid supply port and the mixed liquid discharge port, and the gas supply port is formed in the constricted portion.

[0033] According to such a gas-liquid mixing member having such a configuration, it is possible to suck in the gas in the housing 20 from downstream of the outlet 24 of the housing 20 to promote discharge, and thereby attract the intake of fresh air from the inlet 22 of the housing 20. That is, in the ion generator 1 according to the present embodiment, the gas-liquid mixing member functions as an intake means.

[0034] Moreover, according to the gas-liquid mixing member having such a configuration, the generated ions can be densified and supplied to the liquid in the water tank (the liquid to be treated such as rainwater, wastewater, sludge, etc.), so that the contact opportunity of the ions with the liquid to be treated is maximized, and the residence time in the liquid to be treated can be extended for a long time. As a result, highly efficient ion treatment (ozone treatment) can be realized. Further, according to the ion generator 1 according to the present embodiment, when supplying ions to the liquid in the water tank, in addition to the blowing force of the fan of the blowing unit 50, the self-suction force of the gas-liquid mixing member can also be utilized, so that ions (ozone) can be supplied to the liquid in the water tank more stably without being defeated by water pressure.

[0035] [Configuration of the heat dissipation part] The heat dissipation part 30 is a heat sink made of a material having excellent thermal conductivity. As shown in FIGS. 2 and 3, it includes an upper heat dissipation part 32 provided on the upper surface 20a of the housing 20 of the apparatus main body 10 and a lower heat dissipation part 34 provided on the lower surface 20b of the housing 20.

[0036] As shown in FIG. 3, the upper heat dissipation part 32 includes a base part 32a formed in a long rectangular shape and a plurality of heat dissipation fins 32b erected on the base part 32a. The base part 32a of the upper heat dissipation part 32 is placed in a recess formed in the upper surface 20a of the housing 20 of the apparatus main body 10.

[0037] The heat dissipation fins 32b are formed in a plate shape extending along the flow direction of the air sent out by the blowing unit 50 (in this embodiment, the direction from the front end surface 20e to the rear end surface 20f of the housing 20), and a plurality of them are arranged at a predetermined interval in the direction orthogonal to the flow direction (in this embodiment, the lateral direction of the housing 20).

[0038] The lower heat dissipation part 34 includes a base part 34a and a plurality of heat dissipation fins 34b in the same manner as the upper heat dissipation part 32, and the base part 34a is placed in a recess formed in the lower surface 20b of the housing 20 of the apparatus main body 10. Since the lower heat dissipation part 34 can adopt the same configuration as the upper heat dissipation part 32, the detailed description thereof is omitted.

[0039] [Configuration of the Case] As shown in FIGS. 1 and 2, the case 40 is formed in a cylindrical shape with open front and rear ends, and has a size capable of accommodating the housing 20 and the heat radiating portion 30 of the apparatus main body 10 therein. The front end of the case 40 forms an inlet 42 for allowing air to flow into the case 40, and a blower unit 50 is provided so as to cover the inlet 42. The rear end of the case 40 forms an outlet 44 for discharging the entire amount of air that has passed through the heat radiating portion 30 to the outside.

[0040] The case 40 is configured such that the housing 20 can be inserted into the case 40 from the outlet 44 so that the inlet 22 of the housing 20 of the apparatus main body 10 faces the inlet 42 side of the case 40. Guide cutouts 46 extending from the rear end toward the front end are formed on a pair of side surfaces of the case 40, respectively. The guide cutouts 46 have an up-and-down width that allows the locking projections 29 of the housing 20 of the apparatus main body 10 to be inserted and slid, and are configured to guide the insertion and removal of the housing 20 with respect to the case 40. Further, a cutout 48 for passing a connection line, which extends in parallel with the guide cutout 46 from the rear end toward the front end, is formed on one side surface of the case 40, and is configured to avoid interference with the connection portion 18.

[0041] [Configuration of the Blower Unit] The air supply unit 50 is arranged at the inlet 42 of the case 40 and is configured to introduce fresh air existing outside the case 40 into the case 40. Specifically, the air supply unit 50 has a blower fan, and the blower fan is configured to blow air into the housing 20 of the apparatus main body 10 and also blow air to the heat radiating unit 30. That is, in the present embodiment, since the inlet 22 of the housing 20 of the apparatus main body 10 is accommodated inside the case 40 so as to face the inlet 42 side of the case 40, a part of the fresh air introduced into the case 40 by the air supply unit 50 is introduced into the housing 20 (inside the discharge chamber 26) through the inlet 22 of the housing 20. On the other hand, the remaining fresh air introduced into the case 40 by the air supply unit 50 flows through the space formed between the outer surface of the housing 20 and the inner surface of the case 40 and is discharged from the discharge port 44 through the heat radiating unit 30.

[0042] [Advantages of the ion generator according to the present embodiment] As described above, the ion generator 1 according to the present embodiment includes an ion generation unit 12 having an ion generation surface 14, a housing 20 having a gas inlet 22 and an outlet 24, and a discharge chamber 26 provided in a region between the inlet 22 and the outlet 24. The inlet 22 has a shape in which the opening area of the upstream opening end 22a is larger than the opening area of the downstream opening end 22b.

[0043] According to the ion generator 1 having such a configuration, since the flow velocity can be increased at the inlet 22 and a large amount of air can be taken into the housing 20, it has the advantage that the amount of ions generated and the generation efficiency can be increased.

[0044] In addition, in the ion generator 1 according to the present embodiment, the outlet 24 of the housing 20 has a shape in which the opening area of the upstream opening end 24a is larger than the opening area of the downstream opening end 24b. According to the ion generator 1 having such a configuration, by promoting the exhaust from the outlet 24, a large amount of air can be sent out of the housing 20, and it is possible to attract the intake of fresh air from the inlet 22. Therefore, there is an advantage that the amount of generated ions and the generation efficiency can be further increased.

[0045] Furthermore, the ion generator 1 according to the present embodiment further includes an intake means connected to the outlet 24 of the housing 20. According to the ion generator 1 having such a configuration, the gas in the housing 20 is sucked and discharged from downstream of the outlet 24 of the housing 20, thereby further attracting the intake of fresh air from the inlet 22 of the housing 20. Therefore, there is an advantage that the amount of generated ions and the generation efficiency can be further increased.

[0046] In addition, the ion generator 1 according to the present embodiment further includes a blower unit 50 that blows air into the housing 20. According to the ion generator 1 having such a configuration, the blower unit 50 can supply fresh air rich in oxygen to the discharge chamber 26 in a one-way (one-way) manner, and can increase the flow rate of the air supplied to the discharge chamber 26. For this reason, the ion generator 1 according to the present embodiment can generate a large amount of ions while suppressing the temperature rise of the air accompanying the discharge. Therefore, there is an advantage that the amount of generated ions and the generation efficiency can be further increased. Further, since the ion generator 1 according to the present embodiment is configured to blow air by a fan, the size reduction and power saving of the device can be achieved.

[0047] In addition, the ion generator 1 according to the present embodiment further includes a heat radiating portion 30 provided in the housing 20, thereby making it possible to further suppress the temperature rise of the air flowing in the discharge chamber 26. In particular, since the air blowing portion 50 of the ion generator 1 according to the present embodiment is configured to blow air also to the heat radiating portion 30, it has an advantage that the heat radiating effect by the heat radiating portion 30 can be further enhanced, and the amount of generated ions and the generation efficiency can be further enhanced.

[0048] Furthermore, the ion generator 1 according to the present embodiment further includes a case 40 capable of accommodating the housing 20 and the heat radiating portion 30, and the case 40 has a discharge port 44 for discharging the air that has passed through the heat radiating portion 30. By having such a configuration, the ion generator 1 according to the present embodiment can further enhance the air blowing efficiency with respect to the heat radiating portion 30, and thus the heat radiating effect, and has an advantage that the amount of generated ions and the generation efficiency can be further enhanced.

[0049] Also, in the ion generator 1 according to the present embodiment, since the air blowing portion 50 is arranged at the inlet 42 of the case 40, it is possible to suppress the air blowing portion 50 from becoming hot, so that it is possible to prevent damage to the air blowing portion 50 and further suppress the temperature rise of the air supplied into the housing 20.

[0050] Furthermore, in the ion generator 1 according to the present embodiment, the ion generation portion 12 is configured to be capable of generating at least ozone, and the ion generator 1 further includes an ozone supply portion for supplying the generated ozone into water. In particular, the ion generator 1 according to the present embodiment is configured to be able to supply ozone into water even when using a relatively weak wind force such as a fan. By having such a configuration, the ion generator 1 according to the present embodiment can supply ozone into water with low power consumption by an inexpensive and compact configuration.

[0051] [Modification Example] In the above, the preferred embodiments of the present invention have been described. However, the technical scope of the present invention is not limited to the scope described in the above embodiments, and various changes or improvements can be made.

[0052] For example, in the above-described embodiment, it has been described that the entire ion generation unit 12 is accommodated in the discharge chamber 26, but it is not limited thereto, and at least the ion generation surface 14 may be disposed in the discharge chamber 26.

[0053] Also, in the above-described embodiment, the outlet 24 of the housing 20 has been described as having a shape in which the opening area of the upstream opening end 24a is larger than the opening area of the downstream opening end 24b, but it is not limited thereto.

[0054] Furthermore, in the above-described embodiment, the gas-liquid mixing member of the ozone supply unit has been described as functioning as an intake means, but it is not limited thereto, and any other arbitrary intake means such as a pump may be employed, or a configuration without an intake means may also be acceptable.

[0055] Also, in the above-described embodiment, the blower unit 50 that blows air into the housing 20 has been described as having a blower fan, but it is not limited thereto, and any other arbitrary blowing means such as a pump may be employed, or a configuration without a blower unit may also be acceptable.

[0056] Also, in the above-described embodiment, it has been described that the heat dissipation unit 30 is provided and the blower unit 50 is configured to also blow air to the heat dissipation unit 30, but it is not limited thereto, and a configuration without the heat dissipation unit 30 may be acceptable, or a configuration in which air is blown only into the housing 20 without blowing air to the heat dissipation unit 30 may also be acceptable.

[0057] Furthermore, in the above-described embodiments, it has been described that the case 40 capable of accommodating the housing 20 and the heat radiating unit 30 is further provided, and the case 40 has an air outlet 44 for discharging the air that has passed through the heat radiating unit 30. However, the present invention is not limited thereto, and the case 40 may be configured to accommodate only the housing 20 with the heat radiating unit 30 exposed, or vice versa. Also, a configuration without the case 40 may be employed.

[0058] Also, in the above-described embodiments, it has been described that the blower unit 50 is arranged at the inlet 42 of the case 40. However, the present invention is not limited thereto, and the blower unit 50 may be arranged at the outlet 44 of the case 40, or may be arranged at any other arbitrary position.

[0059] Furthermore, in the above-described embodiments, it has been described that the ion generation unit 12 is configured to be capable of generating at least ozone, and the ion generator 1 further includes an ozone supply unit for supplying the generated ozone into water. However, the present invention is not limited thereto, and a configuration that does not generate ozone may be employed, or a configuration that supplies ozone to other than water may be employed.

[0060] Also, in the above-described embodiments, it has been described that the power supply unit 16 for applying a voltage to the ion generation unit 12 and the connection unit 18 for electrically connecting the ion generation unit 12 and the power supply unit 16 are provided, and the power supply unit 16 is provided outside the housing 20. However, the present invention is not limited thereto, and a configuration in which the ion generation unit 12 and the power supply unit 16 are integrated may be employed.

[0061] Furthermore, in the above-described embodiments, a configuration in which only one device main body 10 is provided has been exemplified. However, the present invention is not limited thereto, and a plurality of device main bodies 10 may be connected in series and arranged, or a plurality of device main bodies 10 may be arranged in parallel.

[0062] Also, in the above-described embodiment, the heat radiating part 30 has been described as including the upper heat radiating part 32 and the lower heat radiating part 34. However, the present invention is not limited to this, and a configuration in which only one of the upper heat radiating part 32 and the lower heat radiating part 34 is provided may be used, or a configuration in which it is disposed at a position other than the upper and lower parts (for example, the side part, etc.) may be used.

[0063] Furthermore, in the above-described embodiment, the heat radiating part 30 has been described as being a heat sink of a heat radiating fin type. However, the present invention is not limited to this, and various known heat radiating members such as a heat radiating plate may be adopted.

[0064] Also, in the above-described embodiment, the ozone supply part for supplying the generated ozone into water has been described. However, the present invention is not limited to this, and a configuration without the ozone supply part may be used.

Explanation of reference numerals

[0065] 1: Ion generator 10: Apparatus main body 12: Ion generation part 14: Ion generation surface 16: Power supply part 18: Connection part 18a: High voltage wire 18b: Ground wire 20: Housing 20a: Upper surface 20b: Lower surface 20c, 20d: Side surfaces 20e: Front end surface 20f: Rear end surface 22: Inlet 22a: Upstream opening end 22b: Downstream opening end 24: Outlet 24a: Upstream opening end 24b: Downstream opening end 26: Discharge chamber 28a, 28b: Connection through holes 29: Locking projection 30: Heat radiating part 32: Upper heat radiating part 34: Lower heat radiating part 32a, 34a: Base 32b, 34b: Heat radiating fins 40: Case 42: Inlet 44: Outlet 46: Notch for guiding 48: Notch for wire passing 50: Blower section

Claims

1. An ion generation unit having an ion generation surface, A housing having a discharge chamber, A case capable of accommodating the housing, Comprising, In the discharge chamber, an inlet for taking in gas into the discharge chamber and an outlet for discharging the gas in the discharge chamber to the outside are formed, The inlet has a shape in which the opening area of the upstream opening end is larger than the opening area of the downstream opening end, The case is formed in a cylindrical shape having a gas inlet and an outlet, The housing is accommodated in the case such that the inlet of the discharge chamber faces the inlet side of the case and the outlet of the discharge chamber faces the outlet side of the case, A space is formed between the outer surface of the housing and the inner surface of the case Ion generator.

2. The outlet has a shape in which the opening area of the upstream opening end is larger than the opening area of the downstream opening end The ion generator according to Claim 1.

3. Further comprising intake means connected to the outlet The ion generator according to Claim 2.

4. Further comprising a blower unit for blowing air into the housing The ion generator according to any one of Claims 1 to 3.

5. Further comprising a heat radiating part provided on the housing, The blower unit is configured to blow air also to the heat radiating part The ion generator according to Claim 4.

6. The case is configured to be able to accommodate the housing and the heat radiating part, The outlet is configured to discharge the air that has passed through the heat radiating part The ion generator according to Claim 5.

7. The blower unit is arranged at the inlet of the case The ion generator according to Claim 6.

8. The ion generation unit is configured to be able to generate at least ozone, Further comprising an ozone supply unit for supplying the generated ozone into water The ion generator according to Claim 1 or 2.

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