KR101101082B1 - An anti-microbial drawer equipped in a dryer - Google Patents

Abstract

The present invention relates to a dryer, and more particularly, to an antimicrobial drawer structure for preventing the growth of bacteria in the drawer in which the condensate generated during the drying process of the laundry is stored.

The drawer structure of the dryer according to the invention comprises 99.0-99.7% by weight of polypropylene and 0.3-1.0% by weight of antibacterial masterbatch, wherein the antimicrobial masterbatch is 90% by weight of polypropylene and 5% by weight of isothiazoline It is produced using an antimicrobial plastic composition composed of a system compound and an inorganic composite compound of 5% by weight.

By the above configuration, even when the condensed water accumulates inside the drawer for a long time, it is possible to prevent parasitics of bacteria and fungi therein, thereby preventing discoloration of infectious diseases and appearance.

Antibacterial Drawer, Antibacterial Masterbatch

Description

{An anti-microbial drawer equipped in a dryer}

1 is an external perspective view of a dryer equipped with an antibacterial drawer according to the spirit of the present invention.

Figure 2 is a perspective view showing a drawer accompanying the antibacterial treatment function according to the spirit of the present invention.

Figure 3 is a photograph showing the results of testing Example 1 and Comparative Examples 1-2 according to the Halo test.

4 is a photograph showing the results of testing Example 1 and Comparative Examples 1 and 2 according to the sample dropping method.

<Description of the symbols for the main parts of the drawings>

100: dryer 110: front cover 120: cabinet

130: top cover 140: control panel 150: drying drum

160: door 170: door lint filter 180: condenser housing

200: drawer 210: drawer cover 220: drawer handle

230: drawer body 240: push protrusion 250: locking hook

260: overflow control

The present invention relates to a dryer, and more particularly, to an antimicrobial drawer structure for preventing the growth of bacteria in the drawer in which the condensate generated during the drying process of the laundry is stored.

In general, a drum type dryer is a device that blows hot air generated by an electric heater or a gas combustion device into a drum to absorb moisture remaining in a drying object and to dry the drying object.

In particular, in the condensing drum dryer, the air inside the drying drum circulates inside the dryer, and heat exchanges in the condenser with the air outside the dryer. In the process of heat exchange in the condenser, water vapor contained in the circulating air is condensed and stored in the condensate storage unit. Here, the condensed water collected by condensation is water that has soaked in the laundry, and is water vapor evaporated by the hot dry air entering the drying drum.

On the other hand, the condensed water is transported and stored in a drawer accommodated on one side of the upper side of the dryer. Then, when the condensed water fills the drawer, the user discards the condensed water.

However, in general, since laundry is subjected to rinsing and dehydration during washing, the amount of water vapor evaporated from the laundry during drying is not so high. Therefore, the drawer is not filled with condensate in one drying process. Therefore, the user goes through the drying process several times, waiting until the condensate is full in the drawer and then drained at once. In this case, in order for the drawer to be full of condensate, washing should be performed at least once. As a result, condensed water is often stored in the drawer for a long time.

In this case, bacteria grow in the condensate stored in the drawer, or mold occurs on the inner circumferential surface of the drawer, which is very dirty for hygiene.

In general, it is easy to think that plastic is a material that is hard to be contaminated with germs, but it is often found that germs or molds occur in household articles made of plastic around it. Plastics have different resistance to germs, but when contaminants are attached to plastics, they grow as nutrients and even plastics deteriorate. The purpose of the antibacterial fungus treatment is to make plastic products that do not generate bacteria on the surface. The treatment methods include a kneading method in which chemicals are added during molding and a post-treatment method for surface treatment after molding, but in the case of plastics, kneading is the most common method.

On the other hand, there is a risk that the fungus or E. coli inhabiting inside the drawer may cause allergies to the human body or cause diseases such as cystitis and pyelitis.

The present invention has been made to solve the above problems, by preventing the growth of mold, E. coli and other various harmful bacteria inside the drawer of the dryer, hygienic to prevent corrosion of the drawer itself or diseased users It is an object to provide a drawer structure.

The drawer structure of the dryer according to the present invention for achieving the object as described above comprises 99.0-99.7% by weight of polypropylene and 0.3-1.0% by weight of antibacterial masterbatch, wherein the antibacterial masterbatch is 90% by weight of poly It is produced using an antimicrobial plastic composition composed of propylene, 5% by weight of isothiazoline compound and 5% by weight of inorganic composite compound.

By the above configuration, even when the condensed water accumulates inside the drawer for a long time, it is possible to prevent parasitics of bacteria and fungi therein, thereby preventing discoloration of infectious diseases and appearance.

 Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

1 is an external perspective view of a dryer equipped with an antibacterial drawer according to the spirit of the present invention.

Referring to FIG. 1, the dryer 100 equipped with the antibacterial drawer according to the present invention includes a front cover 110, a cabinet 120, and a top cover 130 forming an appearance, and an image of the front cover 110. The control panel 140 is mounted on the side part and includes a dial knob 142 and a display unit 141 for inputting operating conditions of the dryer 100.

In addition, a drawer 200 for storing condensed water generated during the drying process is inserted into one edge of the control panel 140, and an opening is formed in an approximately center portion of the front cover 110. Then, the door 160 for opening and closing the opening, and the door lint filter 170 is attached to the rear surface of the door 160 to filter lint and other foreign substances generated during the drying process. In addition, a body lint filter 112 is formed at a lower end of the opening contacting the lower end of the door lint filter 170.

In addition, the dryer 100 has a cylindrical drum 150 accommodated therein, a condenser accommodating part 180 formed below the front cover 110, and a lower side of the condenser accommodating part 180. The suction grill 111 is formed to be longer is further included.

The function of the dryer 100 constituting the above configuration will be described briefly. As the belt (not shown) wound around the outer circumferential surface of the drum 150 rotates in connection with a motor (not shown), the drum 150 is rotated. ) Rotates together. Then, as the drum 150 rotates, the garment or other laundry contained in the drum 150 rises to the upper side of the drum 150 and then drops again from the highest point. Then, the hot dry air entering the rear wall of the drum 150 evaporates the moisture absorbed in the drying object.

On the other hand, foreign matter is filtered through the door lint filter 170 and the body lint filter 112 in the drum air changed into a high temperature and high humidity state by the evaporated water. Then, the air passing through the body lint filter 112 is brought to a low temperature and high humidity while passing through the condenser, and condensed water is accumulated. And, the condensate is finally delivered to the drawer 200. Then, the condensed water that is transported to the drawer 200 is stored by the user.

Figure 2 is a perspective view showing a drawer accompanying the antibacterial treatment function according to the spirit of the present invention.

Referring to FIG. 2, the antibacterial drawer 200 according to the present invention includes a drawer cover 210 constituting the front part, a drawer handle 220 (see FIG. 1) formed to be grooved into the lower side of the drawer cover 210, and A drawer body 230 is formed to extend from the rear surface of the drawer cover 210, and a condensate storage chamber is formed therein.

In detail, a locking hook 250 is formed on the upper side of the drawer cover 210 to allow the drawer 200 to be completely in close contact with the dryer. In addition, a pusher for preventing the drawer 200 from interfering with the top cover 130 of the dryer while the drawer 200 is inserted into an upper portion of the drawer 200 in contact with the drawer cover 210 and the drawer body 230. At least one 240 is formed.

On the other hand, the push protrusion 240 is preferably inclined at a predetermined angle the surface in contact with the upper surface of the insertion hole into which the drawer 200 is inserted, so that it is inserted smoothly when the drawer 200 is pushed in. .

In addition, the locking hook 250 is formed with elastic grooves on both sides in order to have an elastic force. Accordingly, when the drawer 200 is pushed in, the top cover 130 is pressed, and then the drawer 200 is fully reinserted when the drawer 200 is fully inserted. As a result, the locking hook 250 rises to the original position and is caught by the upper inner surface of the insertion hole (not shown) into which the drawer 200 is inserted, so that the drawer 200 is not detached from the dryer.

In addition, since the push protrusion 240 has a shape in which a central portion rises, the drawer 200 is pressed downward when it comes into contact with the top cover 130 of the dryer. Therefore, the phenomenon that the drawer cover 210 interferes with the top cover 130 is eliminated.

Here, the push protrusion 240 may be located at the upper side central portion or both side surfaces of the drawer body 230, but the formation position and shape is not limited to the embodiment of the present invention.

On the other hand, an overflow controller 260 is formed at an approximately end of an upper side of the drawer body 230 and connected to a condensate pipe (not shown) for moving the condensate collected in the sump.

The overflow control unit 260 includes a condensate drop groove 261 for receiving condensate falling from the condensate pipe and an overflow storage unit for receiving condensate overflowed when the condensate is filled inside the drawer 200. 262, and a siphon generator 263 for sending the overflowed condensate back to the sump.

The overflowed condensate flows into the siphon generator 263 and flows back to the sump by the siphon principle.

On the other hand, the drawer 200 is prepared according to a conventional method from 99.0-99.7% by weight of polypropylene (hereinafter referred to as 'PF') and 0.3-1.0% by weight of the antibacterial masterbatch. Here, it is noted that the polypropylene can be used without particular limitation as long as it is used in the art. In addition, the antimicrobial masterbatch is prepared according to a conventional method including 90% by weight of polypropylene, 5% by weight of isothiazoline-based compound, and 5% by weight of inorganic composite compound. The isothiazoline-based compound is 4,5-dichloro-2-n-octyl-4-isothiazolin-3-non (DCOIT) of formula 1 and 2-n-octyl-isothiazoli of formula 2 As a mixture of 3-non (OIT), it is preferable that the ratio of General formula 1: 2 is 4: 1. Other than this ratio, it is difficult to obtain a desired sterilization action in an environment in which the drawer 200 according to the present invention is used. This is because the DCOIT acts as a fast disinfectant, and the OIT acts as a sustained sterilization. In the present invention, zinc oxide is used as the inorganic composite compound.

Example

Example 1

An antimicrobial masterbatch was prepared by adsorbing 5% by weight of an inorganic compound, which is zinc oxide, on 5% by weight of an isothiazoline compound mixed with 90% by weight of polypropylene, DCOIT, and OIT in a ratio of 4: 1.

The resulting antimicrobial masterbatch was mixed with 99.7% by weight of PF in an amount of 0.3% by weight to prepare a drawer.

Example 2

A drawer was prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with 99.6% by weight of PF in an amount of 0.4% by weight.

Example 3

A drawer was prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with 99.5% by weight of PF in an amount of 0.5% by weight.                     

Example 4

A drawer was prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with 9.4% by weight of PF in an amount of 0.6% by weight.

Example 5

A drawer was prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with PF 99.3% by weight in an amount of 0.7% by weight.

Example 6

A drawer was prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with 99.2% by weight of PF in an amount of 0.8% by weight.

Example 7

A drawer was prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with PF 99.1% by weight in an amount of 0.9% by weight.

Example 8

A drawer was prepared in the same manner as in Example 1 except that the antibacterial masterbatch was mixed with 99.0% by weight of PF in an amount of 1.0% by weight.

Comparative Example 1

A drawer was prepared using a commercially available antibacterial master batch Chemcide (10,10'-oxybisp henoxarsine (OBPA)) in an amount of 0.4% by weight. The Chemcide consists of 95% by weight polypropylene and 5% by weight OBPA.

Comparative Example 2                     

A drawer was prepared in the same manner as in Example 1 except for using Ag and Zn instead of zinc oxide.

In order to test the antimicrobial activity of the drawer according to the present invention, the antimicrobial activity of the mixture just before the molding of the drawer obtained in Examples and Comparative Examples was examined.

Halo Test and Shake Flask were tested for bacteria and Halo Test and sample dropping methods for fungi.

Halo Test: Staphylococcus (S.aureus) and Escherichia coli (E. coli) after 3 × 10 ⁶ / plate plated on the NA medium, respectively, and before the drawer molding prepared in Examples 1 to 8 and Comparative Examples 1 and 2 The mixture was placed on a medium with a size of 2.5 × 2.5 cm and incubated at 37 ° C. for 24 hours. The mold was also plated on a PDA plate so that the mold (A.niger) 200μl, and the sample was placed on the medium in a size of 2.5 × 2.5cm, and incubated at 25 ℃ for 24 hours. The performance of the antimicrobial agent was determined by the generation of a clear zone around the sample.

Figure 3 is a photograph showing the results of testing Example 1 and Comparative Examples 1 and 2 according to the Halo test, Figure 4 is a photograph showing the results of testing Examples 1 and Comparative Examples 1 and 2 according to the sample dropping method. .

Here, since the results of Examples 1 to 8 were the same, only the results of Example 1, Comparative Example 1, and Comparative Example 2 are shown in FIG. 3.

Escherichia coli Staphylococcus aureus mold Example 1
- One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 2 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 3 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 4 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 5 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 6 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 7 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Example 8 One 1.1 1.2 1.2 1.5 0.7 0.8 0.8 0.9 0.9 Comparative Example 1 0 0 0 0.3 0.4 0.05 0.05 0.1 0.1 0.1 Comparative Example 2 0.05 0.1 0.1 0.2 0.2 -

"-" Means no effect, in cm.

As can be seen in Table 1 and FIG. 3, the Clear Zone of Example 1 was much wider than Comparative Examples 1 and 2.

 Shake Flask Test: Staphylococcus and E. coli were inoculated into a 10 ml Erlenmeyer flask in LB liquid medium, and 10 mixture samples of the above-mentioned Examples and Comparative Examples were added to each of 1 × 1 cm in size, and then 24 at 37 ° C. Shaking cultures were performed for hours. Before adding the sample, take 100 μl, 10 μl, and 1 μl from the flask and spread them on an NB plate as a control. After incubation, 100 μl and 10 μl of the culture solution were taken, respectively, and plated on an NB plate to measure the number of bacteria. The results are shown in Table 2.

Fungus sample unit Initial bacterial count 24 hours later % Inhibition
Staphylococcus aureus Example 1 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 2 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 3 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 4 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 5 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 6 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 7 CFU / mL 5.0 × 10 ⁵ <1 99.9 Example 8 CFU / mL 5.0 × 10 ⁵ <1 99.9 Comparative Example 1 CFU / mL 5.0 × 10 ⁵ 7.0 × 10 ⁸ 0 Comparative Example 2 CFU / mL 5.0 × 10 ⁵ 6.8 × 10 ⁸ 0
Escherichia coli Example 1 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 2 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 3 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 4 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 5 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 6 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 7 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Example 8 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 14.6 Comparative Example 1 CFU / mL 6.0 × 10 ⁵ 6.4 × 10 ⁸ 15.3 Comparative Example 2 CFU / mL 6.0 × 10 ⁵ 5.2 × 10 ⁸ 31.3

As can be seen from Table 2, the sample according to Example 1-8 showed 99.9% inhibition rate after reducing the number of Staphylococcus aureus bacteria to less than 1 after 24 hours.

Sample dropping method: A test method to check the antimicrobial effect on mold on the surface of the specimen, by dropping a drop of PDA on the specimen, inoculated with mold (A.niger) and incubated at 25 ℃ for 72 hours It is.

Here, Example 1-8 and Comparative Examples 1 and 2 were tested by the sample dropping method, and the results were the same, and only the results of Example 1 and Comparative Examples 1 and 2 are shown in FIG. 4.

Since the antimicrobial test results are almost the same, it is most economical to use the antimicrobial masterbatch in the present invention from 0.3 to 0.3% by weight.

By the drawer structure of the dryer according to the present invention having the above configuration, even if the condensed water is accumulated inside the drawer for a long time, there is an effect of removing the phenomenon that the bacteria grow due to the antibacterial action on the inner wall of the drawer itself.

In addition, since the phenomenon of bacteria propagation in the condensate in the drawer is prevented, there is an effect that the phenomenon that the bacteria harmful to the human body is transferred to the user is removed. In other words, when the dryer is used, the parasitics of bacteria and fungi that may occur inside the drawer are prevented, thereby preventing infectious diseases and discoloration of the drawer appearance.

Claims (3)

As an antibacterial drawer structure of the dryer consisting of 99.0-99.7% by weight polypropylene and 0.3-1.0% by weight antibacterial masterbatch, The antimicrobial masterbatch is prepared using an antimicrobial plastic composition consisting of 90% by weight polypropylene, 5% by weight isothiazoline-based compound and 5% by weight inorganic composite compound, The isothiazoline-based compound is composed of '4,5-dichloro-2-n-octyl-4-isothiazolin-3-non (DCOIT)' and '2-N-octyl-4-isochiazoli-3- Antimicrobial drawer structure of a dryer, a mixture of OIT's. The method of claim 1, Of '4,5-dichloro-2-n-octyl-4-isothiazolin-3-non (DCOIT)' and '2-N-octyl-4-isothiazolin-3-non (OIT)' The ratio is 4: 1, The antibacterial drawer structure of the dryer. The method of claim 1, The inorganic composite compound is an antibacterial drawer structure of the dryer, characterized in that the zinc oxide.

Images