JPWO2010021332A1 - Electrostatic atomizer - Google Patents

Abstract

Provided is an electrostatic atomization device that improves dry skin by generating nanometer-sized charged fine particles containing radicals (active species) and spraying them on a subject showing dry skin. An electrostatic atomizer comprising a discharge electrode, a liquid supply means for supplying a liquid to the discharge electrode, and a high voltage applying means for applying a high electric field to the liquid of the discharge electrode. The applying means applies a high electric field to the liquid supplied to the discharge electrode to generate 1 × 10 14 or more charged fine particles per second.

Description

  The present invention relates to an electrostatic atomizer that generates nanometer-sized charged fine particle water by an electrostatic atomization phenomenon and supplies it to a space to be atomized.

  Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 2005-131549 or the like, an electrostatic mist that repeats splitting and scattering (so-called Rayleigh splitting) in a liquid held at the tip of the discharge electrode by applying a high voltage to the liquid held at the tip of the discharge electrode It is known that a nanometer-sized charged fine particle liquid containing radicals (active species) is generated by this electrostatic atomization phenomenon.

  Currently, many people suffer from dry skin throughout the year. Therefore, the present inventor uses the electrostatic atomization phenomenon as described above to generate a nanometer-sized charged fine particle liquid containing radicals (active species) and sprays it on a subject exhibiting dry skin. We conducted research and development aimed at providing an electrostatic atomizer that can improve drying.

The present invention is an electrostatic atomizer comprising a discharge electrode, a liquid supply means for supplying a liquid to the discharge electrode, and a high voltage applying means for applying a high electric field to the liquid of the discharge electrode. The applying means applies a high electric field to the liquid supplied to the discharge electrode to generate 1 × 10 ¹⁴ or more charged fine particle water per second.

The electrostatic atomizer of the present invention generates 1 × 10 ¹⁴ or more charged fine particle water per second from the discharge electrode and sprays it on a person to reduce the amount of water evaporation in the stratum corneum and the amount of sebum Reduces skin loss, smoothes skin, raises lightness and improves dry skin.

Preferably, the high voltage applying means generates 1.5 × 10 ¹⁴ or more charged fine particle water per second. By increasing the amount of charged fine particle water generated, the stratum corneum moisture content can be increased.

  Moreover, it is preferable that the front-end | tip of a discharge electrode exists in the substantially the same position as the lower end of a counter electrode. With this configuration, the amount of charged fine particle water generated can be increased without changing the applied voltage and current value.

  Preferably, the charged fine particle water has a particle diameter of 3 to 100 nm. Since this particle size is smaller than the size of the horny cells of the human body, it can be supplied to the back of the stratum corneum surface and the amount of water in the stratum corneum can be increased.

  Furthermore, it is preferable to further include a counter electrode positioned at a distance from the discharge electrode. With this configuration, the amount of charged fine particle water generated can be increased.

  The counter electrode has an inner surface facing the discharge electrode, and the inner surface preferably has a curved surface having a predetermined radius of curvature with the tip of the discharge electrode as the center. With this configuration, a strong electric field is generated in a wide range between the inner surface of the counter electrode and the tip of the discharge electrode. As a result, the concentration of the electric field with respect to the tip of the discharge electrode becomes very high, and it is possible to efficiently concentrate charges on the liquid supplied to the discharge electrode and generate a large amount of charged fine particle water containing radicals. Become.

  The counter electrode is preferably provided with a discharge hole, and the discharge hole is preferably provided with a cylindrical electrode portion extending in a direction away from the discharge electrode.

  With this configuration, an electric field is also generated between the inner surface of the cylindrical electrode portion and the tip of the discharge electrode. As a result, a large amount of charged fine particle water is introduced into the discharge hole so as to be attracted to the inner surface of the cylindrical electrode portion extending from the discharge hole, passes through the inside of the cylindrical electrode portion, and is discharged into the external space. Is done. As a result, a large amount of charged fine particle water containing radicals can be released to the external space.

Since the electrostatic atomizer of the present invention applies a high electric field so as to generate 1 × 10 ¹⁴ or more charged fine particle water per second, the amount of water evaporation in the stratum corneum can be sprayed on a person with dry skin. This reduces the amount of sebum, reduces the amount of sebum, adjusts the texture of the skin, increases the lightness, and improves dry skin.

It is a schematic sectional drawing of the electrostatic atomizer which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the electric field between a discharge electrode and a counter electrode same as the above, (a) shows the case where a cylindrical electrode part is not provided, and (b) shows the case where a cylindrical electrode part is provided. It is a schematic side view which shows the dimension of the same discharge electrode and a counter electrode. It is a graph which shows the conductance of the stratum corneum of a test subject's cheek when spraying charged fine particle water on a test subject using the electrostatic atomizer which concerns on Embodiment 1 of this invention, and the conventional electrostatic atomizer. It is a graph which shows the change of the amount of sebum of a test subject's cheek in an example and a comparative example. It is a graph which shows the change of the stratum corneum water evaporation amount (TEWL) of a test subject's cheek in an Example and a comparative example. It is a graph which shows the change of the texture coefficient of a test subject's cheek in an Example and a comparative example. It is a graph which shows the change of L ^* (lightness) of a test subject's cheek in an Example and a comparative example. It is a graph which shows the change of a ^* (redness) of a test subject's cheek in an Example and a comparative example. It is a graph which shows the variation | change_quantity of H (hue) of a test subject's cheek in an Example and a comparative example. It is a graph which shows the variation | change_quantity of V (lightness) of a test subject's cheek in an Example and a comparative example. It is a schematic side view which shows the dimension of the discharge electrode and counter electrode of the electrostatic atomizer which concerns on Embodiment 2 of this invention. It is a schematic block diagram which shows the conventional electrostatic atomizer.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

FIG. 1 schematically shows an electrostatic atomizer according to Embodiment 1 of the present invention that generates 1 × 10 ¹⁴ or more charged fine particles (charged fine particle water) of water from a discharge electrode 1 in one second. Yes.

  The electrostatic atomizer of the present invention shown in FIG. 1 includes a rod-shaped discharge electrode 1, a counter electrode 5 that is located at a distance from the tip 1a of the discharge electrode 1 and that has a discharge hole 5a in the center, and the discharge A liquid supply means 2 for supplying an electrostatic atomizing liquid (not shown) such as water to the tip 1 a of the electrode 1, and electrically connected to the discharge electrode 1 and the counter electrode 5. And a high voltage applying means 3 for applying a high voltage.

  As the liquid supply means 2, the discharge electrode 1 is formed of a material having high thermal conductivity such as aluminum, and the base end portion 1b of the discharge electrode 1 is connected to the cooling portion 8a side of the Peltier unit 8. Thereby, the discharge electrode 1 itself is cooled by the Peltier unit 8 to generate dew condensation water on the surface of the discharge electrode 1, and this dew condensation water is used as a liquid for electrostatic atomization. In the present invention, the liquid supply means 2 is not particularly limited. For example, the discharge electrode 1 is made of a porous material such as porous ceramic or a material having pores, and the base end 1b side of the discharge electrode 1 is connected to a liquid tank. Other configurations such as immersion in a liquid stored in (not shown) may be used.

  The inner curved surface 5 b of the counter electrode 5 facing the tip 1 a of the discharge electrode 1 has a predetermined radius of curvature R centering on the tip 1 a of the discharge electrode 1. A cross section obtained by cutting the inner curved surface 5b along a plane passing through the tip 1a of the discharge electrode 1 has an arc shape having a radius R with the tip 1a of the discharge electrode 1 as the center. Therefore, a strong electric field is generated in a wide three-dimensional range between the entire inner curved surface 5b and the tip 1a of the discharge electrode 1 (see the arrow in FIG. 2A).

  Further, a cylindrical cylindrical electrode portion 7 is extended in the direction away from the discharge electrode 1 (upward in the drawing) around the periphery of the discharge hole 5 a that opens in a circular shape in the counter electrode 5. The cylindrical electrode portion 7 has an opening communicating with the discharge hole 5a at one end (lower side in the figure) and a discharge port 7a communicating with the external space at the other end (upper side in the figure). Since the cylindrical electrode portion 7 is provided, an electric field is generated between the entire inner surface 7b of the cylindrical electrode portion 7 and the tip 1a of the discharge electrode 1, so that it is wider than the case where the cylindrical electrode portion 7 is not provided. A strong electric field is generated in the range (see the arrow in FIG. 2B).

The schematic side view of the electrostatic atomizer 4 which concerns on Embodiment 1 of this invention is shown in FIG. The inner diameter D of the cylindrical electrode portion 7 of the counter electrode 5 is 5.0 mm, the height H in the axial direction of the cylindrical electrode portion 1.5 is 1.5 mm, and the inner curved surface 5b of the counter electrode 5 is opened to the discharge electrode 1 side. The height L from the portion 5c to the discharge port 7a of the cylindrical electrode portion 7 is 4.0 mm, the distance R from the tip 1a of the discharge electrode 1 to the inner curved surface 5b of the counter electrode 5 is 5.0 mm, and the axial direction of the discharge electrode The distance L2 between the lower end 5c of the counter electrode and the tip 1a of the discharge electrode is 2.25 mm. The applied voltage is -5 kV and the current is 6 μA. In the electrostatic atomizer 4 according to Embodiment 1 of the present invention, 1 × 10 ¹⁴ or more charged fine particles of water (charged fine particle water) are generated per second.

  The counter electrode 5 having the cylindrical electrode portion 7 is integrally formed by cutting or bending a conductive material made of a metal such as SUS304 or the like, and is formed by performing metal plating after resin molding. Alternatively, a conductive substance such as a conductive plastic may be used.

  In the electrostatic atomizer having the above configuration, the liquid is supplied to the tip 1a of the discharge electrode 1 by the liquid supply means 2 and held. In this state, the high voltage applying means 3 applies a high voltage between the discharge electrode 1 and the counter electrode 5 so that the tip 1a side of the discharge electrode 1 becomes a negative electrode and charges are concentrated. The electric field generated by the application of the voltage charges the liquid held at the tip 1a of the discharge electrode 1, the Coulomb force acts on the charged liquid, and the liquid level of the liquid locally rises in a conical shape. Charge concentrates at the tip of this cone-shaped liquid (Taylor cone), the charge density becomes high, and the liquid splits and scatters (so-called Rayleigh splitting) so that it can be repelled by the repulsive force of the high-density charge. Repeatedly causes electrostatic atomization. Due to the electrostatic atomization phenomenon, a large amount of nanometer-sized charged fine particles (charged fine particle water) containing radicals (active species) are generated and discharged from the discharge hole 5a to the outside of the apparatus by riding on the ion wind.

  Here, a very strong electric field is generated within a wide range between the counter electrode 5 having the cylindrical electrode portion 7 and the tip 1 a of the discharge electrode 1. Therefore, the degree of concentration of the electric field at the tip 1a of the discharge electrode 1 is very high, the electric charge is efficiently concentrated on the liquid held in the discharge electrode 1, and a large amount of charged fine particles (charged fine particle water) is produced. Occurs.

  In addition, charged fine particles (charged fine particle water) generated in a large amount are introduced into the discharge hole 5a so as to be attracted to the inner peripheral surface 7b of the cylindrical electrode portion 7 extending from the discharge hole 5a. It rides on the ion wind, passes through the inside of the cylindrical electrode part 7, and is discharged toward the external space from the discharge port 7a.

  That is, by further extending the cylindrical electrode portion 7 on the counter electrode 5, the electric field is strongly concentrated on the tip 1 a of the discharge electrode 1, and charged fine particles (charged fine particles) of water containing radicals. Water) can be generated in large quantities, and the charged fine particles of water (charged fine particle water) can be discharged to the outside with high efficiency through the discharge holes 5a without adhering to the inner curved surface 5b of the counter electrode 5. be able to. As a result, charged fine particles of water containing radicals (charged fine particle water) are released in a large amount into the external space.

The electrostatic atomizer 4 of the present invention reduces the amount of sebum by generating 1 × 10 ¹⁴ or more charged fine particles of water (charged fine particle water) per second and spraying it on a person with dry skin. Reduces horny layer moisture transpiration, achieves soft and elastic skin, improves skin texture, increases brightness, and improves skin dryness.

FIG. 12 shows a schematic side view of the electrostatic atomizer 4 according to the second embodiment of the present invention. An inner diameter D of the cylindrical electrode portion 7 of the counter electrode 5 is 3.1 mm, an axial height H of the cylindrical electrode portion 7 is 1.6 mm, and an opening that opens to the discharge electrode 1 side of the inner curved surface 5b of the counter electrode 5 The height L from the portion 5c to the discharge port 7a of the cylindrical electrode portion 7 was 4.1 mm, and the distance R from the tip 1a of the discharge electrode 1 to the inner curved surface 5b of the counter electrode 5 was 2.5 mm. The distance L2 between the lower end 5c of the counter electrode and the tip 1a of the discharge electrode in the axial direction of the discharge electrode is approximately 0.0 mm. However, the distance L2 may be within ± 0.3 mm, for example. Other configurations are the same as those of the first embodiment. The applied voltage is -5 kV and the current is 6 μA. The electrostatic atomizer 4 according to the second embodiment of the present invention generates 1.5 × 10 ¹⁴ or more charged fine particles of water (charged fine particle water) per second.

  In the electrostatic atomizer 4 according to the second embodiment, the tip of the discharge electrode 1 is located at substantially the same position as the lower end of the counter electrode 5, so that the charged fine particle water is not changed without changing the applied voltage and current value. Can be increased. And the amount of water in the stratum corneum can be increased by increasing the amount of charged fine particle water generated.

  In the following examples, a monitor test was performed on the electrostatic atomizer 4 according to Embodiment 1 of the present invention.

Example 1
When charged fine particles (charged fine particle water) are sprayed on the subject with dry skin using the electrostatic atomizer 4 according to Embodiment 1 of the present invention and the conventional electrostatic atomizer 4. The water change in the stratum corneum of the subject was measured under the following conditions. The electrostatic atomizer 4 which concerns on Embodiment 1 of this invention used for the monitor test is as FIG. 1, FIG. The applied voltage is −5 kV and the current is 6 μA. In the electrostatic atomizer 4 according to Embodiment 1 of the present invention, 1 × 10 ¹⁴ or more charged fine particles of water (charged fine particle water) are generated per second.

A conventional electrostatic atomizer 4 used in the monitor test is shown in FIG. The counter electrode 5 is formed in a ring shape having a discharge hole 5a in the center, the discharge hole 5a is opposed to the tip 1a of the discharge electrode 1, and M = 5.0 mm, N = 8.0 mm in FIG. G = 3.0 mm, applied voltage is -5 kV, and current is 6 μA. This conventional electrostatic atomizer 4 generates 0.6 × 10 ¹⁴ charged fine particles of water (charged fine particle water) per second.

  The monitoring test period was from October 24, 2007 to November 2, 2007, and six women with dry skin were selected as subjects from self-reports of 35 to 45 years old.

The monitor test of Example 1 was performed in a 12-tatami room with an indoor temperature of 23 ° C. and a humidity of 30%, with two subjects. In the room, the electrostatic atomizer 4 of the present invention is disposed in the vicinity of the discharge port of the air cleaner that discharges at a flow rate of 1 m ³ / h for diffusion, and is located 2 m away from the electrostatic atomizer 4 Two chairs were installed. The subject washed only his face immediately before entering the room, sat in a chair, and rested for 90 minutes. During this rest period, both the air cleaner and the electrostatic atomizer 4 of the present invention are off. After the rest period of 90 minutes passed, the air cleaner and the electrostatic atomizer 4 of the present invention were turned on for continuous operation. From the electrostatic atomizer 4 of the present invention, charged fine particles (charged fine particle water) of nanometer size water containing 1 × 10 ¹⁴ or more radicals are generated per second, and this is put on the air flow blown out from the air cleaner. Two subjects were sprayed with charged nanoparticle water charged fine particles (charged fine particle water) containing radicals. Conductance (μS) was measured in order to know the subject's stratum corneum moisture change every 15 minutes from the start of spraying.

In the monitor test in the comparative example, a conventional room temperature of 23 ° C. and a humidity of 30% are placed in the vicinity of a discharge port of an air purifier that discharges at a volume of 1 m ³ / h for diffusion in a 12 tatami room. The electrostatic atomizer 4 is arranged, two chairs installed at a position 2 m away from the electrostatic atomizer 4 are installed, and the same six subjects as described above are used in the same manner as above. The same monitoring test as above was performed.

  The monitoring test was conducted on a day that did not fall one week before menstruation, when the subject's skin was prone to rough skin. The test using the electrostatic atomizer 4 of the present invention and the test using the conventional electrostatic atomizer 4 were performed on different days for one subject.

  As a conductance measuring method for knowing the amount of stratum corneum moisture, an epidermis stratum corneum moisture measuring device (SKICON-200EX manufactured by IBS Co., Ltd.) was used. This is a device that measures the skin layer conductance (conductivity) of the stratum corneum moisture and indirectly measures the epidermis stratum corneum moisture instantaneously, with a constant pressure so that the probe surface is parallel to the skin to be measured. Press lightly and measure.

  The conductance of the stratum corneum at two places on the left and right sides of the subject's cheek was measured. In addition, only the subject's cheek was subjected to makeup removal and face washing (without applying lotion or emulsion) before the rest. In addition, at each measurement, the left and right sides of the cheek were measured 6 times each, the upper and lower sides were cut, and evaluation was performed with 4 data.

  The graph which shows the conductance of the cheek of six test subjects of Example (I) using the electrostatic atomizer 4 of the present invention and Comparative Example (II) using the conventional electrostatic atomizer 4 is shown. 4 shows.

  FIG. 4 shows that with the passage of time, the conductance particularly increases in the case of (I), and the difference in conductance between (I) and (II) increases. That is, in the Example using the electrostatic atomizer 4 of this invention, it has shown that the increase in a stratum corneum moisture content is remarkable compared with the comparative example using the conventional electrostatic atomizer.

  Nanometer-sized charged fine particles (charged fine particle water) generated by the electrostatic atomizer 4 have a particle size of 3 to 100 nm, which is smaller than the size of the horny layer cells of the human body. Can increase the moisture content of the stratum corneum. The nanometer-sized charged fine particles contain radicals that act on the skin and hydrophilize the sebum on the skin surface over time. The radicals contained in the nanometer-sized charged fine particles have an effect of increasing the amount of water in the stratum corneum by suppressing the water in the stratum corneum from being diffused from the surface of the skin.

  In the conventional electrostatic atomizer 4, since the generation amount of charged fine particles (charged fine particle water) including water is not sufficient, it is considered that the skin surface cannot be sufficiently hydrophilized with radicals.

  In the electrostatic atomizer 4 of the present invention, charged fine particles of water containing charged radicals (charged fine particle water) are sufficiently generated, so that the skin surface is sufficiently hydrophilized with radicals, and the moisture content of the stratum corneum can be increased. Can improve dry skin.

(Example 2)
The influence (beauty effect) on the skin when the electrostatic atomizer 4 according to Embodiment 1 of the present invention is arranged near the discharge port of an air cleaner that discharges with an air volume of 1 m ³ / h is electrostatic. A monitor test for comparative evaluation with the case where only the same air cleaner was provided without providing the atomizing device 4 was performed under the following conditions.

  In the test of Example 2, similarly to Example 1, the electrostatic atomizer 4 according to Embodiment 1 of the present invention was used in the vicinity of the discharge port of the air cleaner.

  In the test in the comparative example, only the same air cleaner was used, and the electrostatic atomizer 4 of the present invention was not used.

  The test period is from 19th November 2007 to 18th December 2007. Subjects are dry skin throughout the year, especially 45 years ± 2 years old in the apartment house of a full-time housewife who is prone to wrinkles and dry knees in winter. 20 healthy women were selected. The 20 subjects were divided into two groups (Group I and Group II) of 10 subjects each.

  The subjects of group I placed the electrostatic atomizer 4 of the present invention and the air cleaner at their homes and operated continuously for 4 weeks. Group II subjects were allowed to run continuously for 4 weeks with only an air purifier placed at the home of each subject. In both Group I and Group II, the heater was normally operated at the home of each subject. The group I electrostatic atomizer 4 and the air purifier, and the group II air purifier were operated in the place where the subjects in each apartment were mainly located during the daytime, and were operated in the bedroom during sleep.

  The measurement of the amount of sebum on the cheek of the subject, the amount of evaporation of the stratum corneum water (TEWL), the texture coefficient, and the skin color was performed three times at the start, 2 weeks after the start, and 4 weeks after the start.

  The skin measurement test is performed by the double blind test (the test manager and the control product are assigned by the monitor administrator, and the monitor and measurement staff are not informed).

  After washing the face, it was rested in a sitting position for 20 minutes in an environmental test chamber adjusted to a temperature of 22 ° C. and a humidity of 50%, and then the following measurement items were measured.

For measuring the amount of sebum, SM815 manufactured by SEBMETER Course + Khazaka Co., Ltd. was used. The measurement principle is a sebum spot photometer, which is a light transmission amount measurement method. SEBMETER cassettes contain opaque plastic tape with a thickness of 0.1 mm, and new measurement parts appear at any time. The measurement head area is 64 mm ² , the measurement time is 30 seconds, and the cassette with sebum is attached to the main body. When inserted, the transparency of the tape is calculated at the light receiving part on the main body side, and the greater the sebum, the higher the transparency, and the measurement result displays the oil content on the skin surface in units of μg / cm ² .

For the measurement of stratum corneum water transpiration (TEWL), TEWAMETER CO. TM300 manufactured by Ltd. was used. Measure the amount of water transpiration from the skin surface using an open chamber method. The moisture transpiration rate is such that the sensor in the probe cylinder reads the transpiration rate from the vertical direction against the transpiration air flow that flows upward from the skin. Make sure that the transpiration from the stratum corneum moves straight upward, and make sure that the probe is perpendicular to the updraft and lightly put on the skin surface. The unit is g / m ² h.

  For the texture coefficient measurement, HPF-5903A Direct Skin Analyzer (DSA) DS3CA-1021 manufactured by Direct Skin Sensor IIIBP NEC was used. The DSA sensor unit is brought into contact with the measurement site, and an image is captured. In the image capturing process, the skin is irradiated with ultraviolet light of 320 to 400 nm from a light source (UV strobe) built in the sensor unit, and the surface image is captured by a CCD camera. The image is input to the digitizer, and the luminance distribution (step 0-63) of the entire image is obtained to create a binarized image. The texture coefficient is a variation coefficient of black pixels in each mesh when the entire binarized image is divided into 13 × 13 meshes, and represents skin uniformity.

  As the skin color meter, CM-2600d manufactured by Konica Minolta Co., Ltd. was used. The pulsed xenon lamp light diffused in the integrating sphere is uniformly irradiated on the surface of the measurement sample, the reflected light from the measurement sample and the diffused light in the integrating sphere are received, and a wavelength region of 360 to 740 nm is spectrally separated at a pitch of 10 nm. Then, measurement is performed by outputting a current corresponding to the intensity of the light to the analog processing circuit.

  Using each of the measuring instruments described above, for the group I subjects using the electrostatic atomizer 4 and the air cleaner, and for the group II subjects using only the air cleaner, respectively, at the start, two weeks after the start, Three times after four weeks from the start, each measurement item described above was measured for each measurement item described above using a measuring device. The measurement results are shown in FIGS.

  In the graphs shown in FIGS. 5 to 12, “*” is significant at a risk rate of 5% or less, and “x” is significant at a risk rate of 10% or less.

  FIG. 5 shows changes in the amount of sebum on the cheeks. For each of Group I and Group II, the amount of change in the amount of sebum on the cheeks after 2 weeks and 4 weeks from the start time when the start time is the reference value (0.0) is shown.

  In the above graph, in the group II, the amount of sebum greatly decreased in the second week from the start and also decreased in the fourth week at the time when the season shifts from autumn to winter. On the other hand, in Group I, the amount of sebum slightly increased in the second week from the start and slightly decreased in the fourth week. A significant difference was observed between group I and group II at the second week with a risk rate of 5% or less.

  FIG. 6 shows the change in the amount of water evaporation (TEWL) in the cheek stratum corneum. For each of Group I and Group II, the amount of change in the amount of water evaporation in the cheek stratum corneum after 2 weeks and 4 weeks from the start time when the start time is taken as a reference value (0.0) is shown.

  In the above graph, in Group II, the stratum corneum moisture evaporation slightly decreased in the second and fourth weeks from the start compared to the start, but in Group I, the second and fourth weeks from the start, In all of the weeks, the amount of stratum corneum water evaporation greatly decreased compared to the start. And the amount of change with 0 at the start is significantly different between Group I and Group II with a risk rate of 5% or less at the second week from the start and a risk rate of 10% or less at the 4th week. Further, it can be seen that the stratum corneum water evaporation (TEWL) of group I was significantly decreased in both the second and fourth weeks.

  Here, TEWL decreases when rough skin is improved and the stratum corneum is adjusted. Therefore, it can be said that Group I has improved skin roughness and a stratum corneum compared to Group II.

  FIG. 7 shows changes in the texture coefficient. For each of Group I and Group II, the amount of change in the cheek texture coefficient after 2 weeks and 4 weeks from the start time when the start time is the reference value (0.0) is shown.

  Two weeks after the start, it can be seen that the texture coefficient of group I was significantly improved at a risk rate of 10% or less compared to the texture coefficient of group II.

FIG. 8 shows changes in L ^* (lightness). For each of Group I and Group II, the amount of change in the cheek L ^* (brightness) after 2 weeks and 4 weeks from the start when the start time is the reference value (0.0) is shown.

FIG. 9 shows changes in a ^* (redness). For each of Group I and Group II, the change in a ^* (redness) of the cheeks after 2 weeks and 4 weeks from the start when the start time is the reference value (0.0) is shown. .

  FIG. 10 shows changes in H (hue). For each of Group I and Group II, the amount of change in cheek H (hue) after 2 weeks and 4 weeks from the start when the start time is the reference value (0.0) is shown.

  FIG. 11 shows changes in V (brightness). For each of Group I and Group II, the amount of change in cheek H (hue) after 2 weeks and 4 weeks from the start when the start time is the reference value (0.0) is shown.

  As is clear from FIGS. 8, 9, 10 and 11, some significant difference was observed in the amount of change with the reference value (0.0) at the start.

Lab In colorimetric system, the second round of L ^* significantly Group I hazardous rate of change is 10% or less (brightness) is changed to a bright direction than Group II.

In addition, the amount of change in a ^* (redness) in the second week was significantly less than 10%, and group I returned to the red direction more than group II.

  In the HVC colorimetric system, the change rate of V (brightness) in the second cycle is significantly brighter than group II with a risk rate of 10% or less. A significant difference was observed in the amount of change in H (hue) of the eyes with a risk rate of 10% or less.

Claims (7)

Discharge electrode A liquid supply means for supplying a liquid to the discharge electrode. An electrostatic atomizer comprising a high voltage applying means for applying a high electric field to the liquid of the discharge electrode,
The electrostatic atomizer characterized in that the high voltage applying means applies a high electric field to the liquid supplied to the discharge electrode to generate 1 × 10 ¹⁴ or more charged fine particle water per second. 2. The high voltage applying means applies a high electric field to the liquid supplied to the discharge electrode to generate 1.5 × 10 ¹⁴ or more charged fine particle water per second. Electrostatic atomizer.   The electrostatic atomizer according to claim 2, wherein a tip of the discharge electrode is located at substantially the same position as a lower end of the counter electrode.   The electrostatic atomizer according to claim 1 or 2, wherein the charged fine particle water has a particle diameter of 3 to 100 nm.   The electrostatic atomizer according to claim 4, further comprising a counter electrode positioned at a distance from the discharge electrode.   The electrostatic electrode according to claim 5, wherein the counter electrode has an inner surface facing the discharge electrode, and the inner surface has a curved surface having a predetermined radius of curvature centering on a tip of the discharge electrode. Atomization device.   7. The electrostatic atomizer according to claim 6, wherein the counter electrode is provided with a discharge hole, and the discharge hole is provided with a cylindrical electrode portion extending in a direction away from the discharge electrode.

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