JP5448065B2 - An apparatus and method for generating heat by generating microbubbles in a liquid. - Google Patents

Description

The present invention is applied to, for example, a bio field in which a surface of a living body (skin) is stimulated to activate a surface tissue, a negative seeding used for a seed (nucleus) in crystallization, and a gas phase of a general gas-liquid chemical reaction. The present invention relates to an apparatus and a method for generating heat by generating microbubbles that are expected to be used in a wide variety of applications, such as chemical reaction applications used as reaction raw materials.

  One of the inventors has proposed several microbubble technologies. (See Patent Document 2 to Patent Document 4)

The basis of these technologies is a combination of a “vortex pump” and a “discharge nozzle” with a special structure, which is specified in Patent Document 1, and this combination is effective for generating finer microbubbles, which will be described below. It is considered to be the target.

This "microbubbles" are low density type: There are peaks in the distribution in the vicinity of 30μm diameter, that of the state looks the water is cloudy little about several hundred / mL as bubble concentration and a high concentration type : There is a peak of bubble distribution around 10 μm, the number of bubbles is more than several thousand / mL , and the appearance is like milk.

  This “microbubble” stimulates the surface of the living body (skin) and activates the surface tissue, so that when applied to the human body, a health promoting effect can be obtained. This effect is almost the same as that of hot springs. In fact, many hot springs are thought to contain microbubbles.

  Here, the empirical difference between the two types of “microbubbles”: the low concentration type (30 μm) and the high concentration type (10 μm) is generally different from the various effects given by the high concentration type (10 μm). It is much larger than that of (30 μm).

  Therefore, when the present invention is carried out, the high concentration type (10 μm) is similarly effective.

A technique for generating high-concentration type (10 μm) microbubbles is described in Patent Document 1, for example.

  On the other hand, Patent Literature 5 and Patent Literature 6 describe cell culture techniques of a low concentration type (30 μm) or a lower (millimeter scale) type having a larger bubble diameter.

  On the other hand, in Patent Document 1, a vortex pump that performs gas suction at atmospheric pressure is used.

These known techniques are the background of the present invention.
Japanese Patent No. 3620797, “Microbubble generator”, IPMS Japanese Patent Application No. 2009-234683 “A composition containing microbubbles for promoting cell change, an apparatus for producing the composition containing microbubbles, and a method for promoting cell change using the composition containing microbubbles” Tomotaka Marui Japanese Patent Application No. 2009-243940 “Composition of microbubbles and microbubble generator” Tomotaka Marui Japanese Patent Application No. 2009-249900 "Device for generating microbubbles in liquid" Tomotaka Marui Japanese Patent No. 2762372 “Microbubble Generator” Komatsu Ltd. Japanese Patent Publication No. 5-60353 “Culture method and apparatus by aeration in liquid” Hitachi, Ltd.

  An object of the present invention is to add a function of raising the liquid temperature to the techniques disclosed in Patent Documents 2 to 4 by the same inventor.

  The base of the device of the present invention is in the configuration of Patent Document 1. That is, a vortex pump in which a gas suction unit, a liquid suction unit, and a liquid discharge unit are connected is provided, and a liquid in the liquid tank is sucked by the liquid suction unit while the gas is sucked by the gas suction unit. Is a device for generating microbubbles in the liquid.

The eddy current pump rotates a built-in impeller with a motor. The microbubbles generated by such a configuration of Patent Document 1 include at least microbubbles having a particle size of 30 μm or less.

As a result of studying the generation of microbubbles by this configuration, the present inventors have found a condition for a phenomenon in which a physicochemical heat generation reaction occurs in the liquid in which bubbles are generated and the liquid temperature rises. This physicochemical thermal reaction is presumed to be due to adiabatic compression of bubbles flowing through the pump and nozzle.

  That is, in the vortex pump, liquid is sucked at a low pressure generated by turbulent flow, and gas is also sucked and mixed in this low pressure zone. After that, the gas becomes a high pressure of about 5 atm in the discharge nozzle, and the bubble gas Becomes an adiabatic compression state.

  The energy stored here is released in the liquid tank and becomes thermal energy. Therefore, the liquid temperature rises.

The data shown in "◇" in Fig. 6, a measured value of the liquid temperature at normal microbubble generation process, although different in heat transfer heat transfer conditions in temperature and the liquid tank, at about 1 hour generation process The initial liquid temperature shows an increase of 3-5 degrees.

On the other hand, the data shown by “♦” in FIG. 6 is based on the method of generating microbubbles in the liquid of the present invention to generate heat. That is, FIG. 6 shows the result of an experiment for raising the liquid temperature by the method of the present invention. The liquid used in the experiment is water, the amount is 4 liters (including the estimation in the pump and piping), and the pump motor power capacity. It was carried out at 450 W and an air temperature of 20 ° C. The liquid temperature data in the case of a “strong suction state” described later 15-30 minutes after the start of the experiment is indicated by “♦”. On the other hand, the comparison data “◇” is a case where there is no “strong suction state”. In “60” data, the temperature rose to 50 ° C. in about 60 minutes, while the comparative data “◇” remained at about 25 ° C.

In order to generate heat (Claim 8 ), a means for changing the suction load and a control means for giving a command of the suction load are provided at the suction end of the liquid suction means, and the suction load is controlled with respect to the means for changing the suction load. It is necessary for the control means for issuing a command to continuously issue a command to be in a “strong suction state” for a desired time.

Alternatively, in order to generate heat (Claim 9 ), means for changing the rotational speed of the motor of the eddy current pump and control means for issuing a command for the rotational speed of the motor are necessary. It is necessary that the control means for issuing a command for the rotational speed of the motor continuously issues the rotational speed command for a desired time so as to be in the “strong suction state”.

That is, a method of generating heat using a device that generates microbubbles in the liquid, wherein the state in which the device sucks the liquid is a control means for changing the suction load, or a command for the rotational speed of the vortex pump motor The method of the present invention is to cause the liquid to generate heat by having a heat generation triggering (triggering) step that causes the suction state to become a “strong suction state” by the control means that generates the pressure.

  Here, the “strong suction state” is a state in which suction is performed at a low pressure exceeding 110% with respect to the suction low pressure during the rated operation of the vortex pump.

  In the Example of FIG. 6, it was set as the strong suction state from 15 to 30 minutes from the start of experiment. As a result, the liquid (water) temperature rose to 50 ° C. It can be seen from FIG. 6 that once the strong suction state is performed, heat generation continues and the temperature continues to rise even after the strong suction state is stopped. A strong suction state triggers heat generation.

  It is unclear at this time why the continuation of the strong suction state by controlling the suction load and the rotation speed of the pump motor for about 15 minutes in this way is the trigger (trigger) that makes the adiabatic compression heat manifest. is there. However, since this exothermic phenomenon can be reproduced, there is no practical problem. A part of the configuration example of the apparatus of the present invention will be described below in part.

That is, (an example of an apparatus) includes a vortex pump in which a gas suction unit, a liquid suction unit, and a liquid discharge unit are connected, and the liquid suction unit sucks the liquid in the liquid tank while the gas suction unit sucks the gas. An apparatus for generating microbubbles in the liquid in the liquid tank, wherein the vortex pump rotates a built-in impeller with a motor, and the microbubbles include at least a microbubble having a particle size of 30 μm or less. , it means for varying the suction load on the suction end of the liquid suction means (17) is required to have been deployed. This is shown in FIG.

The difference between the conventional apparatus (see FIG. 1) and FIG. 2 is a suction load changing means arranged at 17 or 14. (14 is a liquid suction means (the front end portion thereof))

  Although it is a small device, in order to solve the problem at the time of initial water flow in the conventional configuration of FIG. 1 (refer to the brief description of FIG. 1), W (liquid for filling the pump and the suction / discharge flow path with liquid initially) , X (means for introducing liquid into 16 for initial water flow), and Y (check valve, valve for preventing liquid from flowing out from 16) At the top of the pump. With this configuration, the initial water flow work that has been troublesome in the past is simplified.

The apparatus of the present invention (Claim 1 ) comprises a suction load control means together with the suction load changing means (17), and is strong against the means for changing the suction load in the use state of the apparatus. This is a configuration in which a command to enter the suction state is continuously issued for a desired time to be a trigger for heat generation (trigger).

The apparatus of the present invention (Claim 2 ) comprises means for changing the rotational speed of the eddy current pump motor, and control means for issuing a command for the rotational speed of the motor. The control means for issuing the rotational speed command may be configured to continuously issue the rotational speed command for at least one strong suction state for a desired time to trigger the generation of heat (trigger).

  Again, it is desirable that the strong suction state is a state in which suction is performed at a low pressure with an absolute value exceeding 110% with respect to the suction low pressure during the rated operation of the vortex pump.

  Next, variations of “means for changing the suction load” will be described.

That (claim 3), means for varying the suction load, in the liquid flow path through the suction means, is intended to vary the suction load by changing the flow path cross-sectional area, or means for varying the suction load However, in order to change the opening area of the end of the suction means, a member that partially closes the opening of the end of the suction means is attached or detached, or a member that partially closes the opening of the end of the suction means is slid. The suction load is changed by moving or the liquid suction means has two or more flow paths, and the means for changing the suction load changes the suction load by closing one or more flow paths. It is something to be made.

Here, (Claim 4 ), "Means for changing the suction flow path by changing the flow passage cross-sectional area of the suction means", "A member that partially closes the opening at the end of the suction means is attached and detached. "Means for changing the suction area by changing the opening area of the end", "Sliding a member that partially closes the opening of the end of the suction means to change the opening area of the end of the suction means With respect to the means for changing the suction load, the means for changing the suction load by changing the cross-sectional area of the suction means applies mechanical force to the outside of the tubular flow path made of a flexible member. Means for changing the cross-sectional area of the flow path, or means for changing the suction load by changing the opening area of the end of the suction means by attaching and detaching a member that partially closes the opening of the end of the suction means However, the opening area can be reduced by attaching and removing filters with different mesh sizes. Or means for sliding the member that partially closes the opening at the end of the suction means to change the area of the opening at the end of the suction means to change the suction load. It is preferable that the opening area is changed by sliding the filters having different sizes.

  Now, other aspects of the present invention in which various sensors are deployed will be described. (See FIGS. 3 and 4) It is preferable to add a sensor for detecting pressure. This is because it is clear that pressure is the key to micro bubbling and exothermic phenomena (an element that changes the phenomenon).

That (claim 5), the liquid inside the liquid suction means, or liquid bath liquid suction end near the liquid suction means, or a sensor for detecting the pressure of the liquid inside the vortex flow pump may be deployed.

  Similarly, the optical sensors described in Patent Document 2 to Patent Document 4 are also effective for monitoring the micro bubbling phenomenon.

That is, (Claim 6 ), a sensor for detecting the optical characteristic of the liquid tank liquid in the vicinity of the suction end of the liquid suction means may be further provided. The concentration of microbubbles can be detected from the turbidity of the liquid using an optical sensor.

Further, when microbubbling is experimented, it can be seen that the sound generated from the vortex pump and the discharge nozzle (liquid discharge means) differs, for example, with or without the generation of microbubbles. The difference between the generated sounds can be sufficiently discriminated by detecting the physical quantity of the sound with an acoustic sensor and analyzing the acoustic spectrum. Qualitatively, the sound generated from the discharge nozzle in the process of microbubble generation has more high-frequency acoustic components after the generation than before the generation. The sound generated from the eddy current pump also has more high-frequency acoustic components before and after the generation.

  Similarly, when a heat generation trigger is triggered by the control of the “means for changing the suction load” or the “means for changing the rotational speed of the motor of the eddy current pump” of the present invention to induce a heat generation phenomenon, The sound generated from the pump and discharge nozzle changes. This seems to increase the low frequency component of the sound when the load is "strong suction state".

  These qualitative findings are shown in FIG. That is, FIG. 5 (a) is a comparative schematic diagram of the acoustic spectrum of the generated sound with and without the microbubbles, and FIG. 5 (b) shows a strong suction state compared with the pump rated operation. It is a comparison schematic diagram of the acoustic spectrum of generated sound. The state (a) or (b) can be discriminated by an analysis method focusing on a characteristic portion of an acoustic spectrum pattern such as a difference in frequency domain, a ratio of intensity (intensity) of a specific frequency. Based on such knowledge, a correlation is established between the liquid state and pressure state and the acoustic sensor detection data, so that the acoustic sensor detection signal can be used for control feedback. Therefore, an acoustic sensor is provided, and based on the detected sound, a control signal is output to the means for changing the suction load and the means for changing the rotation speed of the pump motor, which are the actuators described above. Can be used in the exothermic method of the present invention.

That is, a sensor for detecting the sound emitted from the liquid discharge means or the sound emitted from the inside of the eddy current pump is further provided, and the suction load is determined based on the physical quantity of the sound detected by the sensor for detecting the sound. control means, or the rotation speed of the control means of the vortex flow pump motor is suitably configured that instructs that a strong suction state (claim 1 -2).

  As a matter of course, since the present invention generates heat in the liquid, it is also preferable to provide a temperature sensor. Since the result of heat generation is reflected in the liquid temperature of the liquid tank, the temperature of the liquid may be detected by a temperature sensor.

That (claim 7), the sensor may be deployed to detect the liquid temperature of the liquid bath.

The present invention provides an apparatus that generates microbubbles in a liquid and heats the liquid by adiabatically compressing the bubbles . This technique is to add the feature of increasing the temperature of the liquid as an added value. It's cold in the mornings of Hokkaido, Korea and Russia. For example, a hand-washing face-washing device to which the present invention is applied will help people who live in such harsh extreme cold environments to have a warm morning.

  Further, since the chemical reaction is generally promoted when the temperature is high, an effect of promoting the chemical reaction by raising the temperature of the liquid in the reaction system in the presence of the microbubbles using the heat generation of the present invention is also expected. .

Explanatory diagram of problems of conventional commodity products similar to the present invention 17 is an explanatory view of the device 17 of the present invention: (a) and (b) are two side sectional views in which the cross sections are orthogonal to each other. Configuration example of the device of the present invention: Configuration with pressure, temperature, optical sensor Configuration example of the device of the present invention: Configuration in which an acoustic sensor AuS is further added to the configuration of FIG. Schematic diagram of acoustic spectrum of eddy current pump or discharge nozzle generated sound: (a) Comparison between microbubbles and non-exposed states, (b) Comparison between pump rated operation and strong suction state The figure of the result of the experiment which raises liquid temperature with the heat_generation | fever method of this invention. ◆ indicates the liquid temperature measurement data when the exothermic method of the present invention is performed, and ◇ indicates the liquid temperature measurement data in a comparative case where the exothermic method is not performed.

4 Gas suction means 11 Built-in impeller 12 of vortex pump 12 Motor 14 of vortex pump Liquid suction means (front end portion thereof)
15 Liquid discharge means (front end)
16 Suction load changing means 18 provided in the vortex pump 17 14 Liquid bath, in a commodity product, a bathtub or a dog and cat washing tank 19 18 of the present invention For example, the number of revolutions of the liquid bath 3012 of the hot water hand washing / warm water washing unit is changed Means 31 for giving a command for the number of revolutions to the control means 32 for controlling the number of revolutions 32 17 for controlling the suction load for giving a command for the suction load to the sensor 17 OpS Acoustic sensor OpS A sensor for detecting the optical characteristics of the liquid in the liquid tank. For example, a turbidity sensor that measures turbidity with a transmitted light or scattered light measurement method, a sensor that detects the pressure of a PS liquid, a TS sensor that detects the temperature of the liquid, and a liquid that fills the pump and suction / discharge channels with liquid at the beginning Means to supply 14 or 15
X Means for introducing liquid into 16 for initial water flow Y Check valve Valve for preventing liquid from flowing out from 16

Claims (9)

A vortex pump connected to the gas suction means, the liquid suction means, and the liquid discharge means, and sucking the gas in the liquid tank by the liquid suction means while sucking the gas by the gas suction means; to generate microbubbles in an apparatus which Ru is heating a liquid by means of adiabatic compression of the gas bubbles, the vortex pump intended to rotate the internal impeller motor, the microbubble is at least a particle size of 30μm or less Containing microbubbles,
Means for changing the suction load at the suction end of the liquid suction means; and
A sensor for detecting sound emitted from the discharge end of the liquid discharge means or sound emitted from the vortex pump;
A suction load control means for issuing a suction load command to the means for changing the suction load based on the physical quantity of the sound detected by the acoustic sensor ;
The control means issues a suction load command that causes suction at a low pressure of an absolute value exceeding 110% with respect to the suction low pressure during the rated operation of the vortex pump, and the heat generation of the liquid due to adiabatic compression of microbubbles. A device characterized by a trigger . A vortex pump connected to the gas suction means, the liquid suction means, and the liquid discharge means, and sucking the gas in the liquid tank by the liquid suction means while sucking the gas by the gas suction means; to generate microbubbles in an apparatus which Ru is heating a liquid by means of adiabatic compression of the gas bubbles, the vortex pump intended to rotate the internal impeller motor, the microbubble is at least a particle size of 30μm or less Containing microbubbles,
Means for changing the rotational speed of the vortex pump motor; and
A sensor for detecting sound emitted from the discharge end of the liquid discharge means or sound emitted from the vortex pump;
A rotational speed control means for issuing a rotational speed command to the means for changing the rotational speed of the motor based on the physical quantity of the sound detected by the acoustic sensor ;
The control means issues a command of the rotational speed at which the suction is performed at a low pressure of an absolute value exceeding 110% with respect to the suction low pressure at the rated operation of the vortex pump, and the heat generation of the liquid due to the adiabatic compression of the microbubbles. A device characterized by a trigger . The apparatus according to claim 1, wherein the means for changing the suction load is any one of the following A, B, C, and D.
A: Changing the cross-sectional area of the flow path at the liquid flow path at the suction end of the liquid suction means to change the suction load. B Opening area of the suction end by attaching / detaching a member that closes a part of the suction end of the liquid suction means. Change the suction load to change the suction load C A member that closes a part of the suction end of the liquid suction means slides at the suction end to change the opening area of the suction end to change the suction load D Liquid The suction means consists of two or more channels, and one or more suction ends of the plurality of channels are closed to change the suction load. The suction end of A of claim 3 is made of a flexible tubular member, and the flexible member is deformed by applying a mechanical force from the outside to change the cross-sectional area of the flow path, or
The apparatus which is a mesh filter in the member which obstruct | occludes a part of suction | inhalation end of B and C of Claim 3 . One of claims 1 to 4, and generating microbubbles in Ru device is heating a liquid by means of adiabatic compression of the gas bubbles in a liquid,
A device provided with a sensor for detecting the pressure of the liquid inside the liquid suction means, the liquid tank liquid near the suction end of the liquid suction means, or the liquid inside the vortex pump. One of claims 1 to 4, and generating microbubbles in Ru device is heating a liquid by means of adiabatic compression of the gas bubbles in a liquid,
An apparatus provided with a sensor for detecting the optical characteristics of the liquid tank liquid in the vicinity of the suction end of the liquid suction means. One of claims 1 to 4, and generating microbubbles in Ru device is heating a liquid by means of adiabatic compression of the gas bubbles in a liquid,
A device with a sensor that detects the liquid temperature in the liquid tank. A method of generating microbubbles in a liquid using the apparatus of claim 1 and causing the liquid to generate heat by adiabatic compression of the bubbles ,
A triggering step for generating heat of the liquid, in which the suction load control means issues a suction load command in which suction is performed at a low pressure with an absolute value exceeding 110% with respect to the suction low pressure during rated operation of the vortex pump. Having a method. A method of generating microbubbles in a liquid using the apparatus of claim 2 and causing the liquid to generate heat by adiabatic compression of the bubbles ,
A process for triggering the heat generation of the liquid, in which the rotational speed control means issues a rotational speed command that causes suction at a low pressure of an absolute value exceeding 110% with respect to the suction low pressure during the rated operation of the vortex pump. Having a method.