Microbubble generator, water heater, and dishwasher

The microbubble generator addresses liquid film formation and freezing in Venturi channels by using slits to dissolve films and maintain efficient microbubble production, ensuring uninterrupted operation.

JP7887269B2Active Publication Date: 2026-07-09RINNAI CORP
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Patent Information

Application Number
JP2022052189
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-03-28
Publication Date
2026-07-09
Estimated Expiration
2042-03-28

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Abstract

To provide a technology capable of resolving a liquid film in at least one venturi channel of one or more venturi channels.SOLUTION: A micro-bubble generating device is equipped with a body case that has an inflow portion and an outflow portion, and a first micro-bubble generating portion that is stored in the body case and is provided between the inflow portion and the outflow portion. The first micro-bubble generating portion is equipped with one or more venturi channels. The one or more venturi channels are equipped with a diameter-contracting channel contracting a channel diameter toward the downstream side, and a diameter-expanding channel provided on the downstream side with respect to the diameter-contracting channel and expanding a channel diameter toward the downstream side. In at least one of the one or more venturi channels, a recessed slit from an inside surface of the venturi channel outward in a diametrical direction is formed. The slit is continuously provided from a first end portion matching a downstream end of the diameter-expanding channel to a second end portion located on the upstream side with respect to the downstream end.SELECTED DRAWING: Figure 5
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Citation Information

Patent Citations

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    JP2018144018A

  • Gas-liquid mixer

    JP2020015018A

  • Bubble generation device and washing system including the same

    JP2021194625A

  • Micro-nano bubble (UFB) generator and micro-nano bubble (UFB) device.

    JP3235756U