Microbubble generator, water heater, and dishwasher

Abstract

This invention provides a technology that can improve the liquid drainage performance from gaps in a microbubble generating device. [Solution] The microbubble generating device disclosed herein comprises a main body case having an inlet and an outlet, and a first microbubble generating unit housed in the main body case. The first microbubble generating unit comprises a body portion, a venturi channel communicating the interior of the body portion, an upstream fitting portion connected to the body portion and substantially fitted to the inner surface of the main body case, and a downstream fitting portion connected to the body portion downstream of the upstream fitting portion and substantially fitted to the inner surface of the main body case. Inside the main body case, a drain channel is provided that connects the gap space formed between the inner surface of the main body case and the outer surface of the body portion, and between the upstream fitting portion and the downstream fitting portion, to the outlet.

Claims

1. A main body case having an inlet and an outlet, A microbubble generating device comprising a first microbubble generating unit housed in the main body case, The first microbubble generation unit is, A body portion extending between the inlet portion and the outlet portion, A venturi channel that passes through the inside of the body and connects the inlet and outlet, An upstream fitting portion is connected to the upstream end of the body and has an outer surface that is shaped to substantially fit into the inner surface of the main body case when the inside of the main body case is viewed from the upstream side, A downstream fitting portion is connected to the downstream end of the body and has an outer surface that is shaped to substantially fit into the inner surface of the main body case when the inside of the main body case is viewed from the downstream side, It is equipped with, The aforementioned Venturi channel is A narrowing channel, where the channel diameter decreases as you move from the upstream side to the downstream side, It is provided downstream of the aforementioned narrowed-diameter channel, and includes an expanding-diameter channel whose diameter widens as it moves from the upstream side to the downstream side, A microbubble generating device, wherein the inside of the main body case is provided with a gap space formed between the inner surface of the main body case and the outer surface of the body portion, between the upstream fitting portion and the downstream fitting portion, and one or more liquid drainage channels that connect the gap space to the outflow portion.

2. The microbubble generating apparatus according to claim 1, wherein the drainage channels are a plurality of channels, comprising a first drainage channel and a second drainage channel.

3. The microbubble generating device according to claim 1 or 2, wherein at least one of the one or more drainage channels is connected to the gap space near the bottom of the gap space, with its vertically downward direction being downward.

4. The main body case is housed in the aforementioned main body case and further comprises a second microbubble generating section located between the first microbubble generating section and the outflow section. The second microbubble generation unit is, A shaft portion extending in the direction from the upstream side to the downstream side, The outer circumference surrounding the radially outer side of the shaft portion, A plurality of vane portions are provided between the shaft portion and the outer circumference portion, and generate a swirling flow that flows in a predetermined swirling direction relative to the shaft portion, A microbubble generating device according to any one of claims 1 to 3, comprising a swirling channel passing through the gaps between the shaft portion, the outer circumference portion, and the plurality of blade portions.

5. The main body case has an inner surface that is substantially cylindrical in shape and extends in the direction from the upstream side to the downstream side. The first microbubble generating section is formed of resin, The body portion has a diameter-reducing outer surface that decreases in diameter from the upstream side to the downstream side in the portion where the diameter-reducing flow path is provided. The microbubble generating apparatus according to any one of claims 1 to 4, wherein the body portion has an expanding outer surface that expands in diameter from the upstream side to the downstream side in the portion where the expanding channel is provided.

6. The first microbubble generating section is provided with one or more notches formed by cutting out a part of the downstream fitting section from the downstream side toward the upstream side. The microbubble generating device according to any one of claims 1 to 5, wherein the one or more notches function as the one or more liquid drainage channels.

7. The first microbubble generating section is provided with one or more recesses having a shape that is concave from the outer surface of the body toward the inside, The microbubble generating apparatus according to claim 6, wherein the one or more recesses are connected to the one or more notches.

8. A water heater equipped with a microbubble generating device according to any one of claims 1 to 7.

9. A dishwasher equipped with a microbubble generating device according to any one of claims 1 to 7.

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