KR102397370B1 - Elevated ultrasonic dishwasher with functional sealing ring - Google Patents

Abstract

According to the present invention, there is provided a lifting-type ultrasonic dish washing machine having a functional sealing ring, which ultrasonically cleans dishes using an ultrasonic vibrator, comprising: a washing tank having a through hole in its bottom surface; a seating part that is lifted from the inside of the washing tub in a state in which the dishes are seated; a lifting unit comprising a support rod extending in a vertical direction from the bottom surface of the seating unit past the through hole of the washing tub, and an elevating means for elevating the support rod; and a functional sealing ring mounted on the periphery of the through hole of the washing tub in a hollow state to surround the support rod and prevent leakage of washing water in the washing tub.
According to the elevating ultrasonic dish washer having a functional sealing ring according to the present invention, when the support rod for lifting and lowering the seating part on which the dishes are seated moves up and down in and out of the bottom surface of the washing tub, the functional sealing ring enables water leakage function as well as the mobility of the support rod. It provides an effect that can provide a friction reducing function to secure.

Description

Elevating ultrasonic dishwasher with functional sealing ring

The present invention relates to an elevating ultrasonic dish washer having a functional sealing ring, and more particularly, an elevating unit for elevating and lowering a seating unit for accommodating dishes in the ultrasonic washing machine includes a support bar, and the support bar is capable of elevating inside and outside the bottom surface of the washing tub. When sealing the bottom surface of the washing tub by a functional sealing ring, it relates to an ultrasonic dishwasher capable of preventing not only the leakage of washing water to the outside of the washing tub, but also the problem that the support rod is not smoothly raised and lowered due to excessive friction.

The ultrasonic dishwasher is a device that outputs ultrasonic waves that provide fine vibrations through the washing water of a washing tank serving as a medium through an ultrasonic vibrator, and washes dishes through cavitation generated through this.

In the past, dishes were washed manually, but now, with the improvement of residential and living environments, it can be seen that these ultrasonic cleaners are widely used in many homes, restaurants, and food service facilities.

At this time, a large-capacity ultrasonic dishwasher capable of accommodating a relatively large number of dishes has been developed so that it can be used in environments such as large restaurants or food service facilities where numerous dishes need to be washed. It inevitably accompanies the process of putting in or taking out, and in this process, the worker has to keep his back down, so fatigue easily increases, which puts a considerable burden on the worker followed.

In order to prevent this problem, a dish washing machine that automatically raises and lowers a dish shelf has been published, and the ultrasonic dish washing device of Korean Patent No. 2129839 includes an elevating member for lowering the dish shelf into the washing tub or raising it to the upper side of the washing tub. , The elevating member is provided with a vertical guide part installed in a vertical direction on the rear side of the main body, a shelf bracket that ascends or descends along the vertical guide part and the dish shelf is fixedly installed, and is provided at upper and lower portions of the vertical guide part, respectively an upper roller and a lower roller, a driving motor fixed to the side of the vertical guide part, a rotating drum rotating forward or reverse by the driving motor, and an upper part in a state in which the middle part is wound around the rotating drum several times. It has been disclosed that it includes a wire fixed to the vertical guide part in a state via the upper roller and fixed to the vertical guide part in a state in which the lower part passes through the lower roller.

However, according to the prior art, since the tableware shelf is raised and lowered based on the wire, vibration is generated during the winding process of the wire, which causes the tableware shelf to shake and place the tableware shelf in an unstable state. exists

Therefore, a lifting unit equipped with a support rod for stably lifting and lowering dishes is applied, but a sealing function is provided to block the leakage of washing water between the support rod and the bottom surface of the washing tub while the support rod moves up and down in and out of the bottom surface of the washing tub. In addition, if the sealing function is strengthened, there is a need to develop a new and advanced elevating ultrasonic dishwasher that can simultaneously solve the problem that the support bar cannot easily go up and down due to strong friction.

The present invention has been devised to overcome the problems of the above technology, and a functional sealing ring is provided in order to prevent the problem of leakage of washing water between the support rod and the bottom surface of the washing tub in the elevating part that elevates the seating part on which the dishes are seated based on the support rod. A main object is to provide a dishwasher installed on the bottom surface of a washing tank.

Another object of the present invention is to prevent leakage as well as minimize friction by manufacturing a functional sealing ring with a Teflon ring to ensure smooth lifting and lowering of the support rod.

Another object of the present invention is to further improve the performance of reducing friction with the support rod by forming a separate receiving groove on the Teflon ring and then mounting the O-ring thereon.

It is a further object of the present invention to enhance lubrication performance by adding a lubrication enhancer including graphene to the area between the O-rings in the Teflon ring.

In order to achieve the above object, according to an aspect of the present invention, there is provided a lifting-type ultrasonic dishwasher with a functional sealing ring, which ultrasonically cleans dishes using an ultrasonic vibrator, comprising: a washing tub having a through hole in its bottom surface; a seating part that is lifted from the inside of the washing tub in a state in which the dishes are seated; a lifting unit comprising a support rod extending in a vertical direction from the bottom surface of the seating unit past the through hole of the washing tub, and a lifting means for elevating the support rod; and a functional sealing ring mounted on the periphery of the through hole of the washing tub in a hollow state to surround the support rod and prevent leakage of washing water in the washing tub.

In addition, the functional sealing ring is characterized in that the Teflon ring is made of Teflon (Tefron).

In addition, the Teflon ring is provided with a receiving groove that extends in two lines with a difference in height along the circumference of the inner peripheral surface of the hollow, and the receiving groove has a ring shape, nitrile butadiene rubber (NBR: It is characterized in that an O-ring made of Nitrile-Butadiene Rubber is inserted.

Additionally, a plurality of recessed holes are formed in the inner circumferential surface of the Teflon ring between the two O-rings, and the recessed holes include graphite, and the bottom surface of the recessed holes to a depth lower than the depth of the recessed holes. A lubricating agent comprising a base filled from the base layer, a standing body extending upright from the surface of the base layer to the introduction site of the recessed hole at a predetermined distance, and a lubricant filled in the space between the standing bodies on the surface of the base characterized in that

According to the lifting-type ultrasonic dishwasher having a functional sealing ring according to the present invention,

1) When the support bar that lifts and lowers the seating part on which the dishes are seated moves up and down in and out of the bottom surface of the washing tub, the functional sealing ring can provide a water leak function as well as a friction reduction function to secure the mobility of the support bar,

2) By installing an O-ring made of nitrile-butadiene rubber on a functional sealing ring made of Teflon, the friction reduction function can be maximized.

3) By adding a lubrication enhancer including graphite to the area between the O-rings described above, not only can the support rod be more reliably lubricated by the graphite's own solid lubrication function and the lubricating oil adsorption function,

4) The lubrication enhancer has the effect of strengthening the carrier role of the lubricating oil by additionally including a functionalization additive.

1 is a perspective view showing an ultrasonic dishwasher of the present invention.
Figure 2 is a perspective view schematically showing a washing tank of the ultrasonic dishwasher of the present invention.
Figure 3 is a perspective view showing a state in which the support rod is coupled to the functional sealing ring of the present invention.
Figure 4 is a perspective view showing a state in which the O-ring is mounted in the receiving groove of the functional sealing ring.
5 is a partially enlarged cross-sectional view showing a state in which a lubrication enhancer is filled in the recessed hole formed between the receiving grooves of the functional sealing ring;
6 is a flowchart illustrating a process for preparing a functionalizing additive included in a lubrication enhancer.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and like reference numbers in each drawing refer to like elements.

1 is a perspective view schematically showing the appearance of a dishwasher of the present invention, and FIG. 2 is a perspective view schematically illustrating a washing tank of the present invention.

As can be seen from FIGS. 1 and 2 , the dishwasher of the present invention not only performs ultrasonic cleaning in the washing tub 100 , but also accommodates the dishes while the seating unit 200 is supported by the lifting unit 300 . It is based on providing convenience for storing dishes by moving up and down according to the lifting operation of the lifting unit 300 .

The washing tub 100 of the present invention provides a space for storing dishes and washing water. Specifically, a washing tub 100 for storing dishes and washing water, and a tank at the bottom of the washing tub 100 of this narrow arrangement It can be understood as a concept including a housing 110 that provides a space for accommodating a detailed configuration of the lifting unit and a functional sealing ring 400 for solving a water leakage problem when the support rod 310, which will be described later, is raised and lowered.

Here, when the washing tub 100 is described in a narrow sense, the washing tub 100 takes a general structure having a shape consisting of a hexahedral shape in which four side surfaces and a bottom surface are closed in an open state. Of course, the washing tank 100 is not limited to the above-described hexahedral shape, and may be formed in various three-dimensional shapes.

An ultrasonic vibrator (not shown) for generating ultrasonic waves is mounted on at least one or more sidewalls of the washing tank 100 .

The ultrasonic vibrator may be mounted on at least one side wall of the washing tub 100 in a state in which a plurality of groups are processed. For example, for determining the ultrasonic cleaning power, as well as depending on the performance and size of the ultrasonic vibrator, the left wall, the right wall, It is possible to select and mount any one of the rear wall as well as the floor surface or two or more side walls/floor surfaces.

The seating part 200 provides a function such as a tableware pedestal for seating or accommodating dishes in the washing tub 100 , and is a flat plate, ie, a panel, having a mesh structure having a through hole 101 through which washing water can pass. can be made into a shape.

However, in this case, since there is a problem that dishes may flow unnecessarily, a basket (not shown) having a plurality of partition walls for partitioning and accommodating dishes and a base 210 on which these baskets can be detachably seated are used. It is more preferable to do

Referring to FIG. 1 , it can be seen that the base 210 has a structure in which a plurality of frames 220 are connected in a grid shape. In other words, the base 210 provides a physical space in which the basket can be seated, and at the same time takes a structure in which a plurality of circulation holes through which the washing water can flow between the frames 220 are formed.

Furthermore, the frame 220 may be made of a perimeter, that is, a perimeter frame 222 forming a perimeter, and two inner frames 221 cross-extended in a plurality of lattice form from the perimeter frame 222, the inner frame (221) can ensure stability while having a simple structure by taking a structure extending in two to form a cross (+) shape at right angles to each other.

The lifting unit 300 may have various mechanical structures for elevating the seat 200 in a state located below the seat unit 200 .

In particular, the lifting unit 300 of the present invention has a basic feature in that it consists of a support rod 310 and a lifting means 320 in order to strengthen the stable lifting function of the seating unit 200 .

As can be seen from FIG. 2 , the support rod 310 extends in the vertical direction from the bottom of the seating part 200 to the inside of the housing 110 through the bottom surface of the washing tub 100 , that is, the washing tub 100 . ) is a bar-shaped structure that is fitted and coupled to the through-hole 101 penetrating through the bottom surface and moves vertically from the lower part to the upper part based on the bottom surface of the washing tub 100 by driving the lifting unit 300 . .

This support rod 310 may be made of one, but in order to more stably support the seating portion 200 for accommodating breakable dishes, the main support rod 311 is spaced apart from the width corresponding to the width of the seating portion 200. It is preferable that a plurality of the sub support rods 312 stand up and extend.

The lifting means 320 for elevating the support rod 310 may be formed of various mechanical driving means.

As various examples, the lifting means 320 is made of an actuator that raises and lowers a rod connected to the lower end of the support bar 310 with the driving force of the motor, or connects a rack to the lower end of the support bar 310 or the lower portion of the support bar 310 . It may consist of a rack/pinion structure in which the support bar 310 is raised or lowered according to the direction of rotation of the pinion by rotating the pinion connected to the rack by driving the motor, and as a result, a cam It is also possible to transmit the driving force of the motor to the support rod.

In addition, as shown in FIG. 2 , while rotating the timing belt 323 connected to the pulley 322 by driving the motor 321 , the shaft 324 for raising or lowering the support rod 310 using this rotational force and the rotational direction as a medium ), it is also possible to include a power transmission means 325 (links or gears, racks/pinions, etc.) provided with.

As such, the lifting means 320 may be formed of various known mechanical power transmission means, that is, the lifting means 320 of the present invention is not limited to any one limited structure.

The function and operation of the dishwasher of the present invention along with the lifting function of the lifting unit 300 according to the above-described configuration will be briefly described as follows.

Initially, the seating part 200 in the washing tub 100 is located on the upper part of the washing tub 100 in an elevated state. ) to the lower side of the washing tub 100 so that the dishes seated on the seating part 200 are put in the washing water.

Thereafter, the ultrasonic vibrator is driven to perform cleaning by generating ultrasonic waves. When the ultrasonic cleaning and additional functions are completed, the seating unit 200 is again positioned at the upper end of the washing tub 100 by driving the lifting unit 300 so that the user can take out the dishes more easily.

As described above, in the process in which the seating part 200 is raised and lowered by the lifting part 300 , the support rod 310 is directly connected to the bottom surface of the seating part 200 to raise and lower the seating part 200 while supporting the seating part 200 . ) is equipped with a base that can be lifted stably compared to other mechanical means for lifting and lowering.

Through the configuration and function of the present invention, the lifting function of the seating part 200 provides convenience, such as when storing or taking out dishes, and at the same time, the seating part 200 is unnecessarily moved or tilted to one side during the lifting process. It provides a characteristic that can ensure a stable elevating state of the seating portion 200 while preventing a problem that adversely affects the.

Figure 3 is a perspective view showing a state in which the support rod is coupled to the functional sealing ring of the present invention.

As described above, the support rod 310 extends in a state of being fitted into the through hole 101 penetrating the bottom surface of the washing tub 100, and a functional sealing ring 400 is provided around the through hole 101. This is mounted to perform a function of preventing the washing water from leaking out of the washing tank (100).

The functional sealing ring 400 is a kind of packing having a hollow 410 with a hole in the middle, that is, it is formed in a ring shape with an empty middle. It is located between the inner peripheral surfaces and serves to prevent the washing water from leaking between the teeth.

In particular, the functional sealing ring 400 of the present invention is preferably made of a Teflon ring made of Teflon (tefron).

Teflon is a fluororesin developed by Dupon in the United States, and its official name is polytetrafluoroethylene (PTFE: Poly Tetra Fluoro Ethylene).

This Teflon forms a very stable compound due to the strong chemical bond between fluorine and carbon, thereby providing excellent chemical inertness, heat resistance, and non-adhesiveness, and has characteristics such as high insulation stability and low coefficient of friction.

In particular, the Teflon ring 400 provides a frictional force that is too high between the support rod and the through hole 101 so that the support rod 310 cannot properly ascend and descend even by the driving of the lifting unit 300. An appropriate friction force that can prevent It can provide a key role to provide.

4 is a perspective view showing a state in which the O-ring is mounted in the receiving groove of the functional sealing ring.

The above-described Teflon ring 400 is provided with a receiving groove 420 extending in a state recessed into two lines with a height difference along the circumference of the inner peripheral surface of the hollow.

That is, the accommodating groove 420 means a groove dug around one circumference of the hollow 410 with a height difference between the top and bottom.

A ring-shaped O-ring 430 may be inserted into the receiving groove 420 . In particular, the O-ring 430 is preferably made of a nitrile-butadiene rubber (NBR) material.

Nitrile butadiene rubber has basic elasticity as well as oil resistance, that is, a property that the performance is not degraded by lubricating oil, as well as excellent abrasion resistance, low friction, and lubricity by providing excellent sealing function of the Teflon ring 400 In addition to minimizing the frictional force generated by performing can play a role.

5 is a partially enlarged cross-sectional view showing a state in which a lubrication enhancer is filled in the recessed hole formed between the receiving grooves of the functional sealing ring.

The embodiment according to FIG. 5 is to sufficiently add a lubricating function in addition to the sealing function of the Teflon ring 400 and the frictional force offset function of the O-ring 430. First, the Teflon ring 400 between the two O-rings 430. ) on the inner peripheral surface of the plurality of recessed holes 440 are recessed formed.

At this time, the recessed hole 440 means a cylindrical portion recessed in a shape having a predetermined diameter, such as a circle, unlike the receiving groove 420 extending in a band shape along the inner peripheral surface of the hollow 410 . A plurality of such recessed holes 440 may be formed in a random pattern at a predetermined interval in a region between the O-rings 430 .

The lubrication enhancer 450 may be filled in the recessed hole 440 . The lubrication enhancer 450 includes the base 451 and the standing body 452 in a state including graphite.

The base 451 is filled from the bottom surface of the depression hole 440 to a depth lower than the total depth of the depression hole 440, that is, it is filled to have a slightly lower height rather than filling the entire depression hole 440. An extra space is generated at the introduction site of the recessed hole 440 .

On the surface of the base 451 , it is possible for the erecting body 452 to be formed standing up so as to reach the introduction site (the upper end of the recessed hole) of the recessed hole 440 at a predetermined distance from the surface of the base 451 . Although the standing body 452 will be described later while substantially rubbing against the support rod 310, it is preferable to have an appropriate diameter rather than a too thin diameter so that it can serve as its own lubricant.

Lubricating oil 460 may be filled on the surface of the base 451 , more specifically, in the space between the standing bodies 452 , to fill the above-described extra space. The lubricating oil 460 refers to a lubricant such as various known oils, so it is not limited to a specific component and is the same as a known lubricating oil, so a separate description will be omitted.

Graphite, the main material of the lubrication enhancer 450, has a honeycomb structure that forms strong covalent bonds between carbon atoms in the plane direction, and has a weak van der Waals force between the layers of each plane in the vertical direction. This occurs to form a layered structure.

Therefore, the lubrication enhancer 450 can be used as its own lubricant by using the phenomenon in which the vertical layers of graphite are separated by friction acting from the outside.

Furthermore, since the lubrication enhancer 450 including graphite may retain the property of adsorbing the lubricating oil 460 additionally filled in the remaining space of the recessed hole 440, usually the base 451 as well as the standing body ( 452) holds the lubricating oil 460 and serves as a solid lubricant to discharge the lubricating oil 460 when friction and external pressure with the support rod 310 occur, as well as excessive discharging of the lubricating oil 460 by an adsorption function Rather, the support rod 310 moves up and down as if it slides easily, so that it can serve to control the phenomenon in which the above-described water leakage problem occurs in the washing tub 100 .

At this time, in order to improve the performance of graphite as a solid lubricant, functionalization additives are added to graphite to increase lubricity and at the same time increase physical strength, and to strengthen the role as a kind of carrier for immersing the lubricant 460 itself.

To this end, the lubrication enhancer 450 may include 5 to 20 parts by weight of the functionalization additive in 80 to 95 parts by weight of graphite to improve its role as a solid lubricant.

At this time, the functionalization additive may be adjusted in the range of 5 to 20 parts by weight based on the total weight of the lubrication enhancer 450, but it is preferable to be added in a line that does not interfere with the impregnation of the lubricating oil 460, so it does not exceed 20 parts by weight. It is preferable, and 5 parts by weight or more is preferably added in order to improve the physical strength through the functionalization additive and to strengthen the carrier role.

Specifically, the functionalization additive may include graphene oxide functionalized with alkyl and cellulose acetate-g-poly(L-lactic acid).

Here, it was mentioned that graphene oxide is functionalized with alkyl, and preferably, it may be subjected to alkyl functionalization treatment using any one of butyl chloride, tetradecyl chloride, and octyl chloride, and most preferably the above-described alkyl functionalized graphene oxide is used. may be graphene oxide functionalized with butyl chloride.

Cellulose-g-poly(L-lactic acid) is a draft of poly(L-lactic acid) by reacting L-lactite with cellulose acetate as the main chain. It not only strengthens the role of graphite as a lubricant carrier, but also provides an eco-friendly filter and It can function as a carrier.

In this case, the functionalization additive preferably contains 80 to 90 parts by weight of cellulose-g-poly(L lactic acid) alkyl functionalized graphene oxide 10 to 20 parts by weight.

When the weight ratio of the alkyl-functionalized graphene oxide exceeds 20 parts by weight, the efficiency of the carrier role of cellulose-g-poly(L lactic acid) may decrease, and when the weight part of the alkyl-functionalized graphene oxide is less than 10 parts by weight, the alkyl-functionalized graphene oxide This is because the effect of strengthening physical properties and increasing lubricity that can be expected with the addition may decrease.

Furthermore, the functionalization additive described above may be manufactured by a detailed process in a state including an additional composition.

6 is a flowchart illustrating a process for preparing a functionalizing additive included in a lubrication enhancer.

Referring to FIG. 6 , the functionalization additive includes the steps of preparing a first graphene dispersion, preparing a first addition solution, preparing a first reaction solution, obtaining a first reaction graphene, Preparing a secondary graphene dispersion, preparing a secondary addition liquid, preparing a third addition liquid, preparing a secondary reaction liquid, obtaining alkyl functionalized graphene oxide, melt mixture It may include the steps of preparing a molten mixture, drying and pulverizing the molten mixture.

A detailed description of the detailed steps for preparing such a functionalization additive is as follows.

S10. Step of preparing a primary graphene dispersion

First, 10 to 25 parts by weight of graphene oxide and 75 to 90 parts by weight of methanol are mixed to prepare a primary graphene dispersion. At this time, in the case of graphene oxide, pretreatment through washing and drying using methanol or ethanol before preparing the primary graphene dispersion may be performed. Graphene oxide is evenly dispersed in methanol to prepare a primary graphene dispersion.

S11. Step of preparing the first additive solution

When the primary graphene dispersion is prepared, ethylenediamine occupying 5 to 10 parts by weight based on the total weight of the primary graphene dispersion is added to the primary graphene dispersion. Ethylenediamine is provided in the primary addition solution as a role of providing an amine group to graphene oxide, and may be added in the range of 5 to 10 parts by weight, but most preferably in the range of 5 to 8 parts by weight of graphene oxide. It would be most preferred for reaction efficiency with

S12. Step of preparing the first reaction solution

When the first addition solution is prepared, the first reaction solution is prepared by maintaining the first addition solution at 60 to 80° C. for 15 to 20 hours. The amine group (-NH₂) contained in the ethylenediamine added during preparation of this primary reaction solution reacts with graphene oxide to form amine-graphene oxide (NH₂-Graphene Oxide).

S13. Step of obtaining the first reaction graphene

When the preparation of the first reaction solution is completed, the first reaction solution is washed with a sufficient amount of methanol. At this time, the amount of methanol is not limited, and the weight ratio of the first reaction solution to the methanol used for washing may be in the range of 1:1 to 1:10. In this way, the primary reaction solution is washed with methanol and dried at 50 to 70° C. for 20 to 40 hours to obtain particulate primary reaction graphene, that is, particulate amine-graphene oxide (NH2-Graphene Oxide). can do.

S14. Preparing the secondary graphene dispersion

When the primary reaction graphene, that is, particulate amine-oxide graphene is obtained, 10 to 20 parts by weight of the primary reaction graphene and 80 to 90 parts by weight of distilled water are mixed to prepare a secondary graphene dispersion. At this time, distilled water is used as a solvent of the dispersion, and the primary reaction graphene and distilled water are mixed and processed in the corresponding weight ratio to prepare a secondary graphene dispersion in which the primary reaction graphene is uniformly dispersed in distilled water.

S15. Step of preparing the secondary additive solution

Next, a secondary additive solution to be added to the secondary graphene dispersion is prepared. Here, the secondary addition solution is prepared by mixing 4 to 10 parts by weight of butyl chloride and 90 to 96 parts by weight of methanol. Butyl chloride is used for the production of alkyl functionalized graphene oxide, in particular, butyl functionalized graphene oxide.

S16. Step of preparing the tertiary additive solution

When the secondary graphene dispersion and the secondary additive are prepared, 40 to 60 parts by weight of the secondary graphene dispersion and 40 to 60 parts by weight of the secondary additive are mixed to prepare a tertiary additive.

At this time, it is most preferable that the secondary graphene dispersion and the secondary additive liquid are mixed in the same amount, that is, in a weight ratio of 50:50, and in the most preferred tertiary additive liquid preparation, amine-graphene oxide, that is, 1 In consideration of the instability of the secondary reaction graphene, it is preferable to prepare the tertiary addition solution by gradually adding the secondary additive solution dropwise to the secondary graphene dispersion through a method of dropping rather than simple mixing. There are no restrictions on the details of this process, for example, the speed of the drop.

S17. Step of preparing a secondary reaction solution

When the preparation of the tertiary reaction liquid is completed, the secondary reaction liquid is a dispersion in which butyl functionalized graphene oxide is dispersed through a reflux reaction by maintaining the tertiary addition liquid at 70 to 90° C. for 20 to 30 hours. will be manufactured At this time, preferably, the reflux reaction takes place in the range of about 80° C., and most preferably, it takes about 25 hours to prepare the secondary reaction solution.

S18. Obtaining alkyl functionalized graphene oxide

When the preparation of the secondary reaction solution is completed, the secondary reaction solution is washed with methanol once again and dried at 50 to 70° C. for 20 to 40 hours to obtain alkyl functionalized graphene oxide, more precisely, functionalized with butyl ( Butyl funtionalized) graphene oxide is obtained. In this process, the amount of methanol is not limited, and the weight ratio of the secondary reaction solution to the methanol used for washing may be in the range of 1:1 to 1:10. Particulate alkyl functionalized graphene oxide, that is, butyl functionalized graphene oxide is impregnated with the above-described cellulose acetate-g-poly(L-lactic acid) carrier.

S19. preparing a molten mixture

When particulate alkyl-functionalized graphene oxide is obtained through the above-described process, 10 to 20 parts by weight of the alkyl functionalized graphene oxide and 80 to 90 parts by weight of the particulate cellulose acetate-g-poly(L-lactic acid) are mixed handle

At this time, for even mixing, the melting point range of cellulose acetate-g-poly(L-lactic acid), that is, 100 to 140° C., most preferably 130 to 140° C., is heated and stirred for 8 to 24 hours to achieve alkyl functionalization. A melt mixture between the graphene oxide and cellulose acetate-g-poly(L-lactic acid) is prepared.

S20. drying and grinding the molten mixture

The molten mixture described above is a state in which alkyl-functionalized graphene oxide is dispersed in a cellulose acetate-g-poly(L-lactic acid) polymer solvent, and the molten mixture is dried and pulverized at 20 to 40° C. for 20 to 40 hours. Alkyl-functionalized graphene treated by treatment on a polymer carrier is prepared.

Therefore, cellulose acetate-g-poly(L-lactic acid) prevents the lubricating properties and strength enhancing effect of the additive from being deteriorated by repeated immersion of graphite in lubricating oil. to bring about a synergistic effect.

If heat is generated by repeated friction between the support rod 310 and the lubrication enhancer 450, there is a possibility that the lubrication performance through the graphite may be deteriorated.

In order to prevent this, the functionalization additive described above is an alumina (Al₂O₃) nanofluid, that is, a liquid in which alumina on nanoparticles is evenly dispersed through a liquid solvent (preferably purified water) to increase thermal conductivity. It may further include, and in the case of alumina nanofluid, it may be added in the range of 1 to 5 parts by weight based on the total weight of the functionalization additive.

As such, when the alumina nanofluid is included, thermal conductivity is increased to improve cooling performance, thereby preventing deterioration of lubricating properties due to heat generated while the lubrication enhancer itself rubs against the support rod.

Since the alumina nanofluid is a form in which nanoparticle alumina is dispersed in a liquid phase such as purified water as described above, it exhibits higher dispersibility and miscibility than the form in which simple alumina powder is added to the above-described molten mixture as a functionalization additive. It is possible to maximize the heat dissipation performance.

In addition, when the alumina nanofluid is further included in the functionalization additive, an additional process is further required in the method of manufacturing the functionalization additive, which will be described in detail as follows.

S21. Steps to prepare an alumina dispersion

After the molten mixture is dried and pulverized, alumina nanoparticles to be further added are prepared.

In this case, the particle diameter of the alumina nanoparticles may be preferably controlled within the range of 30 to 100 nm, and there is no particular limitation on the method of controlling the particle diameter. Most preferably, alumina nanoparticles having a diameter of about 40 nm are prepared.

5 to 15 parts by weight of the alumina nanoparticles and 85 to 95 parts by weight of distilled water are mixed to prepare an alumina dispersion.

In this process, 5 to 15 parts by weight of alumina nanoparticles and 85 to 95 parts by weight of distilled water are mixed for uniform dispersion of the alumina nanoparticles, and then ultrasonic waves are applied to uniformly disperse the alumina nanoparticles in distilled water.

In addition, although there is no separate limitation on the ultrasonic frequency, it is most preferable to apply the ultrasonic wave in the frequency range of 16,000 Hz to 100,000 Hz, and the time for applying the ultrasonic wave may be adjusted in the range of 1 to 10 minutes.

S22. Steps to complete the final reaction

When the alumina dispersion and the pulverized molten mixture are prepared, the pulverized molten mixture is slowly added to the alumina dispersion and stirred using ultrasonic waves to complete the functionalization additive.

20 to 40 parts by weight of the pulverized molten mixture and 60 to 80 parts by weight of the alumina dispersion are mixed, but the above-described pulverized molten mixture is slowly added to the alumina dispersion by weight, and 1 to 5 parts by weight of nanodiamonds and boron After adding 1 to 3 parts by weight of nitride (Boron Nitride), the alumina dispersion and the pulverized molten mixture, nanodiamonds, boron by performing ultrasonic stirring in the frequency range of 16,000 Hz to 100,000 Hz for 1 minute to 100 minutes at 120 to 150 ° C. At the same time as the homogeneous mixing of the nitride, distilled water contained in the alumina dispersion is evaporated.

As the temperature condition is 120 to 150° C., the melting of cellulose acetate-g-poly(L-lactic acid), which serves as a carrier in the pulverized melt mixture, occurs, as detailed in the molten polymer cellulose acetate-g-poly(L-lactic acid). Alumina nanofluid, nanodiamond, and boron nitride as well as an alkyl functionalized graphene oxide are evenly dispersed.

Here, the nanodiamond is a diamond powder having a nano diameter, and boron nitride also has a powder form. Both of these nanodiamonds and boron nitride have the effect of improving the heat dissipation properties, and when nanodiamonds and boron nitride are added as functionalization additives together with the alumina nanofluid, the heat dissipation properties can be further maximized.

S23. drying and grinding the final reactant

When the preparation of the final reactant is completed, the final reactant is dried and pulverized at 20 to 40° C. for 20 to 40 hours to obtain a particulate functionalizing additive.

The particulate functionalization additive is a form in which alkyl functionalized graphene oxide, more precisely, butyl functionalized graphene oxide and alumina nanofluid are uniformly dispersed using cellulose acetate-g-poly(L-lactic acid) as a carrier. .

Therefore, the functionalization additive can improve the cooling performance by increasing the thermal conductivity by including the alumina nanofluid.

In addition, the lubrication enhancer 450 including graphite and the support rod 310 prevent the lubricating properties from being deteriorated due to the friction of the support rod 310, and at the same time, the alkyl functionalized graphene oxide brings the lubricating properties and strength increase effect. Furthermore, cellulose acetate-g-poly(L-lactic acid) provides properties that can prevent the lubricating properties and strength enhancing effect through alkyl functionalized graphene oxide from being deteriorated due to repeated immersion in lubricant.

As described so far, the configuration and operation of the lifting-type ultrasonic dishwasher having a functional sealing ring according to the present invention are expressed in the above description and drawings, but these are merely examples and the spirit of the present invention is not limited to the above description and drawings. is not limited thereto, and various changes and modifications are possible without departing from the technical spirit of the present invention.

100: washing tank 101: through hole
110: housing 200: seating part
210: base 220: frame
221: inner frame 222: perimeter frame
223: waterway 300: lift
310: support bar 311: main support bar
312: sub support bar 313: space
320: lifting means 321: motor
322: pulley 323: timing belt
324: shaft 325: power transmission means
400: functional sealing ring (Teflon ring) 410: hollow
420: receiving groove 430: O-ring
440: recessed hole 450: lubrication enhancer
451: base 452: standing body
460: lubricant
S10: Step of preparing a primary graphene dispersion
S11: Step of preparing the first additive solution
S12: preparing a first reaction solution
S13: obtaining the first reaction graphene
S14: Preparing a secondary graphene dispersion
S15: Step of preparing the secondary additive solution
S16: Preparing the tertiary additive solution
S17: preparing a secondary reaction solution
S18: obtaining alkyl functionalized graphene oxide
S19: preparing a molten mixture
S20: drying and grinding the molten mixture
S21: preparing an alumina dispersion
S22: Completing the final reactant
S23: drying and pulverizing the final reactant

Claims (8)

An elevating ultrasonic dishwasher having a functional sealing ring, comprising:
A washing tank that ultrasonically cleans dishes through an ultrasonic vibrator, the washing tank having a through hole in the bottom surface;
a seating part that is lifted from the inside of the washing tub in a state in which the dishes are seated;
a lifting unit comprising a support rod extending in a vertical direction from the bottom surface of the seating unit past the through hole of the washing tub, and an elevating means for elevating the support rod;
It is mounted on the periphery of the through hole of the washing tub in a state of having a hollow and surrounds the support rod to prevent leakage of the washing water of the washing tub, and extends into two lines with a height difference along the periphery of the inner peripheral surface of the hollow. Including, a functional sealing ring made of Teflon (Tefron) in a state with the receiving groove
In the receiving groove,
As a ring shape, an O-ring made of a nitrile-butadiene rubber (NBR) material is inserted,
A plurality of recessed holes are formed in the inner peripheral surface of the functional sealing ring between the two O-rings,
In the penetration hole,
A lubrication enhancer comprising graphite and a base filled from the bottom surface of the recessed hole to a depth lower than the depth of the recessed hole, and a standing body extending from the surface of the base layer to the introduction site of the recessed hole at a predetermined distance and lubricating oil filled in the space between the standing bodies on the surface of the base. The method of claim 1,
The lubricant enhancer is
80 to 95 parts by weight of graphite and 5 to 20 parts by weight of a functionalizing additive,
The functionalizing additive is
An ultrasonic dishwasher comprising: graphene oxide functionalized with any one of butyl chloride, tetradecyl chloride, and octyl chloride; and cellulose acetate-g-poly(L-lactic acid). 3. The method of claim 2,
The alkyl functionalized graphene oxide is, characterized in that the graphene oxide functionalized with butyl chloride, ultrasonic dishwasher. 4. The method of claim 3,
The functionalizing additive is
preparing a primary graphene dispersion by mixing 10 to 25 parts by weight of graphene oxide and 75 to 90 parts by weight of methanol;
preparing a first addition solution by adding 5 to 10 parts by weight of ethylenediamine based on the total weight of the primary graphene dispersion;
maintaining the first addition solution at 60 to 80° C. for 15 to 20 hours to prepare a first reaction solution;
washing the first reaction solution with methanol and drying at 50 to 70° C. for 20 to 40 hours to obtain a first reaction graphene;
preparing a secondary graphene dispersion by mixing 10 to 20 parts by weight of the first reaction graphene and 80 to 90 parts by weight of distilled water;
preparing a secondary addition solution by mixing 4 to 10 parts by weight of butyl chloride and 90 to 96 parts by weight of methanol;
preparing a third addition solution by mixing 40 to 60 parts by weight of the second graphene dispersion and 40 to 60 parts by weight of the second additive solution;
preparing a second reaction solution by maintaining the third addition solution at 70 to 90° C. for 20 to 30 hours;
washing the secondary reaction solution with methanol and drying at 50 to 70° C. for 20 to 40 hours to obtain alkyl-functionalized graphene oxide;
10 to 20 parts by weight of the alkyl functionalized graphene oxide and 80 to 90 parts by weight of the cellulose acetate-g-poly(L-lactic acid) are mixed and stirred at 100 to 140° C. for 8 to 24 hours to prepare a molten mixture step;
An ultrasonic dishwasher, characterized in that produced through; drying the molten mixture at 20 to 40 ℃ for 20 to 40 hours and pulverizing. 5. The method of claim 4,
The functionalizing additive is
Further comprising an alumina nanofluid,
After drying and pulverizing the molten mixture,
preparing alumina nanoparticles having a particle diameter of 30 to 100 nm, mixing 5 to 15 parts by weight of the alumina nanoparticles and 85 to 95 parts by weight of distilled water, and then applying ultrasonic waves for 1 to 10 minutes to prepare an alumina dispersion;
15 to 25 parts by weight of the pulverized molten mixture, 50 to 70 parts by weight of the alumina dispersion, and 1 to 5 parts by weight of nanodiamonds and 1 to 3 parts by weight of boron nitride are mixed, and 1 to 120 parts by weight at 150 ° C. to complete the final reaction by ultrasonic stirring for 100 minutes;
Drying and pulverizing the final reactant at 20 to 40° C. for 20 to 40 hours; Ultrasonic dishwasher, characterized in that it further comprises.
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