JP2009082672A - Structure of high temperature heating space part of radiation type razor edge sterilizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clarify a to-be structure of the key point part of a small razor edge sterilizer which has a high temperature heating space capable of sterilizing viruses and can be set on the front of a shop, and adjusting the balance between high temperature radiation, prevention of sharpness lowering by "burning", uniforming of temperature distribution in the high temperature heating space, etc. <P>SOLUTION: The method of sterilization is a high temperature radiation system in which a razor edge fixed by a holder is heated by heating plates at both sides. The structure of a high temperature heating space is determined by studying the interrelationship between: (1) shortening an attachment space between the razor edge and the heating plate; (2) determination of the optimum area of a heat insulating cover opening part; (3) improvement of accuracy of attaching the high temperature heating plates; (4) temperature/temperature of the razor edge/virus sterilizing speed of the high temperature heating space; and (5) targeted sterilization time. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a structure of a high-temperature heating space portion of a radial razor disinfector.

1. Razor disinfection technology presented by the Ministry of Health, Labor and Welfare

The Ministry of Health, Labor and Welfare's instruction and control on razor disinfection, especially razor disinfection, is said to be disinfected for each customer in the law and beautician law, but the proposed disinfection method is a short time at the store, Because it is not easy, accurate, and can not be performed on a small scale, razors that are not disinfected in reality are used repeatedly. Therefore, HIV and HBV infections are uncontrolled, and these intractable patients suffer from disease and beauty shops. It is estimated that it has increased significantly.
For needles, the disposable method has been implemented with chitin since 50 years ago.
Laws and recommendations of the Federation of Science and Beauty Associations, etc., carefully wash with clean and running water regarding the method of disinfection of equipment. (1) Boil at 56 ° C or higher for 30 minutes or more, or (2) Boil for 5 minutes or more. Soak for at least 10 minutes in 2.5% or more ethanol. Wipe with absorbent cotton or the like that contains about 80% ethanol. There are cresol water, coal acid water, etc., but customers cannot confirm the actual site.
(3) Dry heat disinfection at 100 ° C for 20 minutes or more, or irradiation for 100 minutes or more with ultraviolet rays (100 microwatts / square cm or more), “To disinfect each customer, the scissors work within 10-15 minutes. Considering the circumstances that require that all disinfection steps be completed in parallel, the restraint time is long and cannot be implemented.
(4) Steam disinfection for 10 minutes or more, (5) Boil water for more than 10 minutes, etc. The measures of the humid heat system cannot be installed in a narrow store. It is difficult to carry out disinfection using these existing disinfection principles and existing facilities and equipment.
There is a risk that the barber will be addicted to the quality and concentration of XX liquids. There are many things that cannot be confirmed by customers for XX ° C and XX minutes. In addition, it is necessary for children to have a method that allows them to understand and confirm the disinfection performance of barbers.
2. Summary of current background technology

In summary, there is currently no sterilizer that can be sterilized for each customer at the store, and razor disinfection has not been performed.
Disinfection by heating proposed by the authorities (one with a circle number): (1) Boil for 30 minutes or more at 56 ° C or more, (2) Boil for 5 minutes or more, (3) Dry for 20 minutes or more at 100 ° C Heat disinfection, (4) Steam disinfection for 10 minutes or more, (5) Boil in boiling water for 10 minutes or more.
The disinfection temperature (disinfection time) by these methods is
(1) 56 ° C to 100 ° C (30 minutes), (2) 100 ° C (5 minutes), (3) 100 ° C (20 minutes), (4) 180 ° C (10 minutes), (5) 100 ° C (10 Minutes)
It is common knowledge of the background technology related to the current disinfectant that heating at 100 ° C for 10 minutes or more in water.
3. Necessity of newly developed technology and its candidates

Recently, however, the number of barber shops with low prices has increased, and the common point is that the scissors time is shortened. To disinfect chitin behind the scissors work, it is necessary to shorten the disinfection time within 10 minutes. I came. For this reason, it has been requested to enhance the performance by increasing the sterilizing ability and reducing the disinfection time.
In order to enhance the performance, the present inventor has thrown away the common sense of “100 ° C., 10 minutes or more, water” and newly sterilized viruses with shells at “150 ° C., within 10 minutes, water pear”. I challenged.
For this purpose, in addition to the radiation type razor disinfector at the level assumed by the present inventors, (1) high temperature and high energy of the heat source, (2) reduction of the installation interval between the blade and the heat source, (3) We will investigate new countermeasures to increase the upper limit of blade heating as a newly developed technology candidate, evaluate the results of the examination based on whether or not sterilization has actually been performed, and apply the concept that contributed to sterilization to a disinfection device as a new technology. did.
4). The relationship between fire abris and sharpness as seen from metallurgical knowledge

As a starting point for starting 150 ° C sterilization, we will describe the life norms and heating limits for blades. Since ancient times, nabe and kama have been set on fire, but the use of knives and blades with fire has been strictly prohibited in daily life. This is because the blade with “yaki” becomes “namakura” and cannot be cut.
This code of life seems to have delayed the realization of “Razor to Able Disinfector”, ie, a Radiant Razor Disinfector.
In fact, razor blade materials are shipped after being “tempered” to increase toughness after quenching. Tempering means reheating the razor at a temperature of 200 ° C. or less for about 1 hour.
Even when a new razor is reheated at a temperature of about 150 ° C. for about 10 minutes, the cutting edge (equivalent to 760 degrees in terms of HV hardness) has a hardness sufficient to cut the beard (equivalent to 120 degrees in terms of HV hardness).
Furthermore, it is said that the hardness (sharpness) of a razor hardly changes even if "reheating for 10 minutes" is repeated.
Note Quenching temperature 800 ° C HRC hardness 67 ° Tempering 200 ° C 61 °
150 ° C 62.5 degrees (HV hardness equivalent to 760 degrees)
Beard hardness HS 20 degrees (HV hardness equivalent to 120 degrees)
Now, even if the blade is pushed into the high-temperature heating space where the nichrome wire on the heating plate glows red, the temperature of the razor rises as far as the temperature of the heating plate if the razor is left in the high-temperature heating space, Within a few hours, “baking” will return to “namakura”, so the heating part of the radiant razor disinfector is equipped with a temperature control function, the razor temperature is 150 ° C or less, and the heating time is 10 minutes or less. Therefore, the reduction in sharpness cannot be prevented unless efforts are made to shorten as much as possible.
The literature mainly relied on “Fujikoshi Heat Treatment Research Group Chopsticks to know about heat treatment”.
5). Check sharpness of razor after high temperature heating

The inventor actually made a radial razor disinfector and heated the razor, measured the temperature, and checked the sharpness,
(A) The heating plate radiates high heat of 800 ° C to 1000 ° C.
(B) Although the temperature of the razor placed close to the heating plate via the holder rises to about 160 ° C 2 minutes after the start of heating, the temperature adjustment function works here, and the temperature of the razor drops sharply for 3 minutes. Later, the temperature dropped to 120 ° C. to 140 ° C., and thereafter, this temperature level could be kept stable.
(See the attached “Examination of inactivation effect of human immunodeficiency virus (HIV) by powerful razor disinfector” on page 2)
(C) The inventor later repeatedly performed “reheating the razor for 10 minutes” 10 times, and tested the sharpness with his own mustache each time.
As a result, compared with a new razor, there was no remarkable sharpness deterioration.
As long as the object to be heated is limited to a razor, it is possible to produce a small and powerful radiation type razor disinfector that does not lose its sharpness.
6). Will the virus die by radiant heating?

6.1 Principle of virus destruction by radiation heating Bacteria, viruses, etc. (hereinafter referred to as viruses, etc.) are made up of gene chains (DNA, RNA, etc., materials are proteins). Proteins solidify at temperatures above about 60 ° C.
The solidified protein (denatured protein) does not return to its original living state.
Viruses, such as the AIDS virus (HIV), are relatively heat-sensitive, and the hepatitis B virus (HBV) protects the central part where the gene is stored with a double shell. There are various types that are resistant to heat, but if the center is heated to 60 ° C or higher, all viruses will be killed.
In radiant heating, in fact, the main purpose is not to heat the razor, but to the surface of the virus attached to the surface of the razor, radiating high-temperature heat close to 1000 ° C a little ahead of the razor, It aims to absorb and accumulate heat, alter the protein in the shell (= destroy the gene), and sterilize it.
When the temperature of the razor reaches 130 ° C, the heat of 130 ° C of the razor is conducted from the back side of the virus attached to the surface of the razor, and heat is accumulated in the virus shell, Its purpose is to destroy proteins (genes).

6.2 Whereabouts of the radiated thermal energy Radiated thermal energy is absorbed by the object. (1) It is absorbed by the object. (2) It is reflected from the object and goes away. (3) It passes through the object. It is divided into three ways.
Holding a razor with HIV attached to the blade surface between two high-temperature heating plates and heating,
The razor has a shiny blade surface, so much heat energy is reflected, but much heat energy is absorbed and accumulated inside the razor, and the razor temperature can be raised to about 160 ° C in 1 to 2 minutes. Assuming that the surface of the HIV virus on the blade surface is uneven and opaque, the degree of absorption and accumulation of heat energy in the center of the virus is higher than that of the razor by the amount of reflected heat energy. On sunny days, but at low temperatures, touching metal rails attached to wooden window frames can be surprisingly hot. This is because the heat energy of the sun (a high-temperature heat source) is accumulated in the rail, and the heat of temperature is not transmitted to the rail.
When the sterilization process by radiant heating is performed, the mass of the razor and virus is incomparably different, so the temperature of the core of the virus is naturally higher than the temperature of the razor, or at least the protein in the center of the virus is The temperature will be destroyed (60 ° C).
If high temperature radiation close to 1000 ° C is not stopped for 2 to 3 minutes and continues for 5 to 10 minutes, even a heat-resistant virus can be surely killed.
If we take this idea one step further and examine whether there is any virus that can survive when the razor reaches 160 ° C, it will be possible to further shorten the heating time.
Speaking from the conduction heat side, if water is entangled in the heat source, the boiling point of 100 ° C. or the 180 ° C. wall of the steam pulls the foot, a high heat source cannot be obtained, and the conduction heat must be lowered. A radiant razor disinfection method in which only the razor is heated in the immediate vicinity of the high-temperature heating plate without using water will also be beneficial for the realization of a sterilization method that can destroy viruses.
6.3 Was the virus sterilized with this radial razor disinfector?

Next, I would like to evaluate whether the virus with shells could be sterilized. Ask the Associate Professor Nakajima, Department of Microbiology, University of Yamanashi, and use this disinfectant (powerful razor disinfector) to determine the infectious titer of HIV virus. We had you measure. As a result, it was less than the detection limit after heating for a very short time (1 minute, but recommended by Prof. Nakajima to keep heating for 5 minutes).
(Refer to the attached “Investigation of the inactivation effect of human immunodeficiency virus (HIV) using a powerful razor disinfector” for the results of the sterilization test of HIV virus using a powerful razor disinfector based on this disinfection principle).
If it was a disinfectant unrelated to water, it was proved that if a hot red heat source was radiated to a razor directly from a short distance and heated, the virus would die in a very short time and the sharpness would not be lost. .
“To sterilize viruses with shells in water pears within 10 minutes at a razor temperature of 150 ° C.” “To stabilize the razor temperature (although the stability of 150 ° C. could not be confirmed due to the adjustment of the temperature control function) The experimental result was obtained that “the virus with shells can be sterilized with water pear at 130 ° C. for 5 minutes”.
The result of this experiment shows that the result below the limit of detection is obtained with 1 minute of radiation, which indicates the possibility of being below the limit of detection for most viruses with 5 minutes of radiation. is there.
If “disinfection for 10 minutes or more” becomes “sterilization within 5 minutes”, it will be effective in suppressing epidemics of intractable diseases.

Problem 1 The disinfectant must be of a size that can be placed in the store. If it is a size that cannot be placed in the store, “disinfection of each razor per customer” will not be established.
Task 2 To eliminate the waste associated with the use of water
Water prevents the temperature from rising above 100 ° C
If parts and devices that handle water are attached, the disinfectant will grow that much.
The trouble of handling water makes the barber work longer. Problem 3 The disinfectant has a high-temperature heating space that can destroy proteins in the virus shell by radiation. In the past, heating plates and razor holders were directly attached to the heat insulation cover of the heating section, which had difficulty in strength and accuracy, and limited the quality of razor heating.
Exercise 4 The disinfector raises the temperature of the razor body to about 120 ° C within 2 to 3 minutes from the start of disinfection so that the protein in the virus shell can be destroyed even with heat conduction from the razor at 120 ° C. Can be held stably.
Problem 5 To provide a disinfector with a mechanism that can be confirmed from the customer's side that “disinfection for themselves is definitely performed”.
Problem 6 To alleviate and equalize the extreme uneven distribution of temperature distribution in the high-temperature heating space.
Measures to improve temperature shortage in some areas of the high-temperature heating space (ceiling, opening such as entrance, back)

Means 1 First, the dimensions of the main part of the radial razor disinfector were determined with the dimensions of the razor remaining as commercial products.
Small parts were preferentially selected for the disinfectant, and the space wasted was eliminated mainly in the control panel, so it became possible to reduce the external dimensions of the radial razor disinfectant.
Means 2 The mechanism related to water was eliminated, and as a result, the external dimensions of the radial razor disinfector could be 300 mm wide × 170 mm deep × 222 mm high.

Mean 3 Shortening the heating plate mounting interval,
As shown in FIG. 4, a frame 20 is newly added as a skeleton at the center of the heat disinfection unit.
(1) Attach the two heating plates 3 and 3 to the frame 20 so that the distance between the heating surfaces is parallel with a width of 30 mm.
(2) Attach the holders 18, 19, and 18 holding the razor so that the blade is vertical with the blade facing up, to the frame 20 so that it comes to the center of the two heating plates of (1),
As a result of (1) and (2), a high-temperature heating space was completed in which the distance between the center line of the razor and the heating surface of the heating plate 3 outside the razor was suppressed so as to be within 15 mm on both the left and right sides.
As a result, the razor inserted in the holder was irradiated with a high temperature of 800 ° C. to 1000 ° C. from a close range, and a high temperature heating space was born that was heated and sterilized in a short time.
By adopting the frame, the problem of poor accuracy and insufficient strength at the heating plate mounting position has been solved.
As shown in FIG. 1, the heating plate is a mica plate 3 in which a nickel chrome steel ribbon 4 is wound (50 V, 200 W) in two (total 400 W) and connected in series.
This type can make the heating plate relatively thin.
Further, as shown in FIG. 4, the heat loss plates 27 and 27 were attached to the outer sides of the two heating plates 3 and 3 at a distance of 15 mm, respectively, to suppress energy loss.
Note The supplemental high-temperature heating space for Mean 3 is not determined by the relationship between the position and dimensions of the heating plate and the razor.
The area of the opening 16 of the heat retaining cover 15 of the heating part is also an important factor related to the formation of the high temperature heating space.
There are various types of heating plates other than the (mica plate + nickel chrome steel ribbon wrapping method), which we tested this time, and other types of high-temperature heating spaces including them in order to ensure freedom in future design. The upper limit of the relationship between the position and dimensions of the heating plate and the razor is defined as follows.
A quartz tube heating unit that combines several quartz tube heating tubes with a heating wire in a quartz tube, or a heating unit that combines several types of heating tubes with a protective tube on the heating wire is more suitable than a mica plate heating plate. Thickness as a heating plate is thick. Even when this is used in place of a mica plate heating plate, the distance between the heating surfaces of the two heating plates is kept within 60 mm for reasons of heating time, etc., and a razor is bladed with a holder installed in the center It is necessary to make it a high-temperature heating space in which the center line of the razor and the outer heating plate are kept within 30 mm on both sides.
Means 4 Item [0005] After the temperature of the razor body rises to 120 ° C. to 150 ° C., an automatic temperature control circuit that keeps the temperature of the razor body in that temperature range is incorporated, [0006] As shown in (b), after 2 minutes from the start of heating, the temperature rises to about 160 ° C, the temperature adjustment function works, the temperature of the razor drops sharply, and after 3 minutes, the temperature stabilizes at 120 ° C to 140 ° C. It was possible to have a function that can be maintained.
Means 5 The mechanism for confirming from the customer's side that "the sterilization for me was definitely done" is as follows.
When the razor is inserted into the holder and the push button switch (red) 12 shown in FIG. 3 is pressed, the buzzer sounds, the neon lamp (red) 11 is turned on, and the heating plate and timer are started.
When the heating time inputted in advance comes, the power transmission circuit of the heating plate is opened, a buzzer sounds, the neon lamp (green) 10 is turned on, the neon lamp (red) 11 is turned off, and the cooling fan 22 starts to rotate at the same time. When the pre-input cooling time comes, the power transmission circuit to the cooling fan opens, a buzzer sounds, the cooling fan stops, and the neon lamp (green) 10 turns off.
The push button switch (black) 9 is for emergency stop.

Mean 6: Reduction of the opening area of the heat disinfection part heat insulation cover The razor 17 is inserted into the holders 18, 19, 18 for heat disinfection, and the area of the opening 16 for taking out from the holder after disinfection is too wide, Since the temperature of the high-temperature heating space did not increase easily, trial and error were repeated and the results were narrowed down as follows.
Heat disinfection part heat insulation cover 15 dimensions Width 104 x depth 157 x height 113 mm Dimensions of the opening 16 on the same box (after narrowing down)
A band-shaped opening having a width of 20 mm × depth of 157 mm was provided on the ceiling from the front front center portion to the rear surface, and then a rectangular opening portion having a width of 20 mm × vertical length of 60 mm was provided downward from the upper end center portion of the front of the cover.
Note, the size of the heat disinfecting part heat insulation cover may vary depending on the heating plate used, but the size of the razor will not change much in the future. The width of the opening of the heat insulating cover should be kept as narrow as possible, and the width of 20 mm should be protected.

According to the HIV virus sterilization test results using a powerful razor disinfector based on this disinfection principle, the HIV virus infection titer was measured in a very short period of time (1 minute, however, the Yamanashi Medical University Microbiology Department, Associate professor Nakajima recommends keeping it heated for 5 minutes. From this fact, the inventor's greed is that even if the HIV virus becomes HBV virus, while the razor is heated to 120 ° C, the virus that is attached to the razor is naturally 120 ° C finer than the razor. This radiant razor disinfector will have a strong sterilizing power.

The most important technical point of this disinfectant will be problems with the gap between the heating plate and the razor and the high-temperature heating space.
Hold the distance between the heating surfaces of the two heating plates within 60 mm, hold the razor in the center vertically with the blade facing up, and hold the razor center line and the heating surface of the heating plate outside it, The structure of the high-temperature heating space that is within 30 mm on both the left and right sides is considered to have a high heating effect.
In addition, it is desirable that the heat disinfection part heat insulation cover dimensions and the opening dimensions for inserting and removing the razor should be determined below the dimensions described below.
Thermal insulation cover dimensions width 130mm x depth 170mm x height 120mm
Ceiling opening dimensions width 20mm × depth 170mm
Front center center vertical opening dimensions Width 20mm × Vertical length 70mm

The outline of the manufactured radiation type razor disinfector is as follows.
1 Arrangement of Functional Parts On the left side of the base board 7, a control panel, a housing 8 storing a buzzer / confirmation lamp unit, on the right side, an air supply hole 14, a terminal block 25, a temperature switch 26, a cooling fan 22, 23, a fan housing 13 having a heat-resistant partition plate 21, and a heat insulating cover 15 covering the razor heating / disinfecting portion are disposed thereon.
The reason why the razor heating / disinfection part is placed on the right side of the disinfector is to make it easy for “right-handed” people to attach and remove the razor to the holder of the heating part.
The details of the control panel, temperature control unit, and buzzer alarm unit are omitted.
2 Structure of the heat disinfection unit The “key” for realizing disinfection for each customer in the store, that is, the structure of the heat disinfection unit that realizes downsizing and radiation type heat disinfection is as follows (see FIG. 4).
(1) Heating plate 3 pair, (2) Heat reflecting plate 27 pair (outside of heating plate), (3) Razor holder 18, 19, 18, (4) Frame 20, (5) Insulation cover 15,
Please refer to [Measure 3] in [0011] section of [Means for Solving the Problems] for an example of dimension reduction regarding the high temperature heating space of the heat disinfection section.
This radiation type razor disinfectant is a type approval number 81-22233 on November 1, 1994 after various tests at the Japan Electrical Appliances Laboratory. The type approval of is acquired. (In addition, this patent application aims to acquire the rights by publicizing the limitation of dimensional shortening of the high heat heating space based on actual experience. The indication for the test machine at the Nippon Electric Appliances Laboratory is the insulation on the terminal block. Both the distance and the insulation distance on the control board are urged to extend the dimensions, which means that this patent application is the first to disclose the limitation know-how of the dimension reduction for the high heat heating space. .)
In this patent application, it is called a radial razor disinfector in the normal explanation scene, but it is sometimes called a powerful razor disinfector in relation to external documents. Both are the same.

Although the effect has been confirmed for HIV, it can be applied to hepatitis B, hepatitis C and the like.
If the sterilization conditions for various viruses with shells have been clarified, the heating conditions (temperature, time) will be relaxed, and in the very near future, a radiation razor disinfector will be used for 2 to 5 minutes. Let's realize the method of disinfection of razor by heating.

Fig. 1 Plan view Fig. 2 Cross section Fig. 3 Perspective view Fig. 4 Cross section

Explanation of symbols

1 Mica plate assembly bracket (upper side)
2 Mica plate mounting hole (upper side)
3 Mica plate 4 Nichrome wire ribbon 5 Mica plate assembly bracket (lower side)
6 Mica plate mounting hole (bottom)
7 Base 8 Control panel, push button, confirmation light system housing 9 Black push button switch (for emergency stop)
10 Green confirmation light (indication of cooling)
11 Red confirmation lamp (display during heating)
12 Red push button switch (Starts heating and automatically starts cooling after heating is completed)
13 Fan housing 14 Air supply hole 15 Heat retaining cover 16 Heat retaining cover opening 17 Razor 18 Razor holder 19 Razor holder bottom plate 20 Frame 21 (For protecting the main part of the fan) Heat resistant partition plate 22 Fan 23 Fan driving motor 24 Fan mounting plate 25 Terminal Block 26 Temperature Switch 27 Heat Reflector

Claims (4)

(1) Attach the two heating plates to the frame so that the distance between the heating surfaces is within 60mm.
(2) Attach the holder that holds the razor blade so that it is vertical with the blade facing up, and attach it to the frame so that it comes to the center of the two heating plates in (1).
As a result of (1) and (2), the central part of the high-temperature heating space of the razor disinfector is such that the distance between the center line of the razor and the heating surface of the heating plate outside thereof is within 30 mm on both the left and right sides. Construction Heat disinfection part heat insulation cover that keeps the dimensions within the dimensions described below Heat insulation cover dimensions width 130mm x depth 170mm x height 120mm
Ceiling opening dimensions width 20mm x depth 170mm
Front center center vertical opening dimensions width 20mm × vertical length 70mm Layout of a radial razor disinfector with a heating part on the right side and a control part on the left side Within 2 minutes after the start of heating, the temperature of the razor is once raised to around 160 ° C, but the temperature control function works, and then the automatic temperature control circuit that keeps the temperature of the razor around the lower limit temperature of 100 ° C and the upper limit temperature of 150 ° C. A razor disinfection method in which heating is performed for 2 to 5 minutes using a radial razor disinfector having

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