KR101755113B1

KR101755113B1 - Grease Trap

Info

Publication number: KR101755113B1
Application number: KR1020150126222A
Authority: KR
Inventors: 남홍선
Original assignee: 남홍선
Priority date: 2015-09-07
Filing date: 2015-09-07
Publication date: 2017-07-06
Also published as: KR20170029203A

Abstract

A grease trap according to the present invention includes: a housing having an upper portion opened and a cover opened / closed, wherein one side wall is connected to the inlet pipe and the opposite side wall is connected to the outlet pipe; A partition wall formed parallel to one side wall of the housing and spaced apart from a bottom surface of the housing by a predetermined distance; A filter disposed between the inlet tube side wall and the partition wall; At least one separation membrane formed on one side of the inside of the housing so as to be perpendicular to the direction of the drainage flow; And a drainage assembly including a horizontal tube having a bottom opening portion immersed in drainage and a horizontal tube having one end connected to the vertical tube and the other end connected to the outlet tube, And a guide path for guiding the drainage overflowing from the bottom to the drainage pipe.

Description

Grease Trap

The present invention can stably prevent reverse flow of odors and pests by ensuring a proper sewage depth by applying a drainage assembly having a novel and simple structure and to prevent the reverse flow of pests and stains by suddenly flowing a large amount of kitchen sewage, Wherein the grease trap housing is provided with a grease trap which is capable of ensuring a high efficiency against a substantial size of the housing by ensuring that the grease trap housing is capable of accepting a suitable level of water storage capacity, .

The grease trap is connected to the front of the piping that discharges the odd water generated by the cooking preparation, cooking or washing process in all kitchens such as hotel, restaurant, general restaurant, hospital, school, food processing factory etc. In order to prevent the clogging of the pipe by attaching the oil dissolved in the drainage to the inner wall of the drain pipe, it is installed to separate and coagulate and remove the animal and vegetable oil contained in the drainage.

In other words, the grease trap is a facility for separating the various kinds of oil contained in the sewage discharged from the kitchen by natural floating from water using a specific gravity difference, and it is maintained in a drainage pipe, a septic tank, a sewage treatment plant, It prevents various problems that may occur due to the minute.

A prior art related to the grease trap is Korean Patent No. 10-1096495. The above technique removes a large foreign object contained in the incoming wastewater and floats the unfiltered small foreign object and the oil using a vortex so that a small foreign object is entangled in the oil to make it into a lump, , The filter basket member, the holding dispersing member, the holding contact member, and the holding basket.

The above technique may be characterized in that it uses various separating means to recover all of the maintenance. However, when such a tool is practically applied, the tool is so large that the manufacturing cost is high, It will be bigger. Therefore, the technique is difficult to be used in a shallow depth and is limited in usage. In addition, although the bottom portion is provided with a discharge port that is submerged in wastewater, if the discharge port is implemented with only the contents described in the prior art, the bottom depth is too shallow, The possibility of infestation of insects is also very high.

Japanese Laid-Open Patent No. 5462744 is also disclosed. The above-mentioned patent discloses a washing machine comprising a container body of a tubular container, comprising a first separation chamber provided with a basket through which drainage flows, a second separation chamber floating by separating the fat by using a difference in specific gravity between water and oil, Wherein the trap portion is located in the drain outlet portion so that the bottom end of the drain outlet portion is lower than the lower portion of the drain outlet portion so as to be submerged in the drain water in the container body to drain the drain outlet portion, Wherein the upper end of the mudguard plate is positioned higher than the lower portion of the drainage outlet to determine a standard water level of the water in the container body, wherein the mudguard board has a width larger than the inner diameter of the drainage outlet .

The patent describes a typical shape of a drainage trap installed using an elbow pipe or the like. It is possible to form a drainage trap in a box shape and then to provide a mud receiving plate therein so that the standard water level surface is set high The mud board is not only a simple structure that performs only the function of the partition wall but also a vortex is formed by the support portion abutting the floor surface and the food waste is highly likely to flow into the drain outlet portion.

Further, when the person skilled in the art realizes the patent, the drain trap may be made of a material such as stainless steel, FRP, polyvinyl chloride, polypropylene or the like. However, Separate members are required for watertight connection of the tube. In addition, it is difficult to produce a mold integrally because it is difficult to make a mold structurally in injection molding when manufacturing polyvinyl chloride. In the case of polypropylene, there are three openings in the blow molding process, The post-processing is increased, resulting in an increase in the overall production cost.

The prior art described above is characterized in that the mud board has a width larger than the inner diameter of the drain outlet. However, considering the function of the grease trap, only a part that should be taken into consideration in order to prevent the leakage of the impurities due to the flow velocity Do.

Therefore, it is possible to prevent the inflow of odor and worms more safely and surely, to increase the efficiency of wastewater treatment compared to the size of the housing accommodating the wastewater, and to remarkably reduce the manufacturing cost. Development and commercialization of grease traps are very urgent.

The present invention has been devised in order to overcome the problems of the above-described technology, and it is intended to deeply penetrate deeply into the seam to block the inflow of odors and worms.

Another object of the present invention is to maximize the processing capacity of wastewater even if it is manufactured so as to have a shallow depth so that it can be efficiently installed and used even in small restaurants.

Still another object of the present invention is to reduce the manufacturing cost by making it possible to utilize a product that has been conventionally standardized and manufactured.

It is a further object of the present invention to provide a sludge treatment apparatus that can be processed not only as a fat content but also as a food sludge.

In order to achieve the above object, a grease trap according to the present invention includes: a housing having an upper portion opened and closed by a lid, one of the side walls being connected to the inlet pipe and the opposite side wall being connected to the outlet pipe; A partition wall formed parallel to one side wall of the housing and spaced apart from a bottom surface of the housing by a predetermined distance; A filter disposed between the inlet tube side wall and the partition wall; At least one separation membrane formed on one side of the inside of the housing so as to be perpendicular to the direction of the drainage flow; And a drainage assembly including a horizontal tube having a bottom opening portion immersed in drainage and a horizontal tube having one end connected to the vertical tube and the other end connected to the outlet tube, And a guide path for guiding the drainage overflowing from the bottom to the drainage pipe.

The seaming floor is formed on the inner side of the vertical tube at a predetermined distance from the side of the vertical tube of the horizontal tube, and the guide is provided in the longitudinal direction so as to be accommodated in the horizontal tube from the seam floor And the upper end of the trap is opened so that the overflow can be introduced into the upper part.

In addition, the vertical tube and the horizontal tube are assembled.

In addition, the trap sight is formed to have a diameter smaller than that of the horizontal pipe, and a drainage inflow space is formed between the horizontal pipe and the trapbeam so that the drainage water can sweep all over the top of the sealant floor and the guide .

In addition, the guide may include a tapered portion extending obliquely downward along the longitudinal direction of the horizontal pipe at the upper end surface of the seaming floors.

In addition, there are provided a separation membrane formed on the upper portion perpendicular to the direction of the drainage flow to block the flow of float-separated oil, and a water separator formed on the lower portion perpendicular to the direction of the drainage flow to shut off the flow of the food sludge precipitated on the bottom, And a sludge trap.

In addition, the sludge trap has a rectangular basket-like shape with an open top and three sidewalls formed to abut the inner wall of the housing, and a sidewall of the inner side of the sidewall at the upper end of the sidewall not in contact with the inner wall of the housing And a guard portion bent and extended from the extension end of the vertical extension portion toward the receiving portion, wherein the vertical extension portion is bent at the extension end of the horizontal extension portion, The surface is characterized by being made of a detachable and dense mesh material.

In addition, the drainage assembly may further include a water filter having a bottom surface of the mesh structure capable of flowing drainage and being detached from the bottom of the vertical tube, wherein the bottom surface is provided with a carrier storage space.

Characterized in that the surface-modified activated carbon is stored in the carrier storage space.

In the grease trap according to the present invention,

1) Even if it is manufactured so small as to have a shallow depth, the treatment capacity of the sewage can be maximized, so that it can be efficiently installed and used even in small restaurants,

2) Even small grease trap with shallow depth is deeply formed to cut off the inflow of odor and insect,

3) It is possible to utilize a product that has been conventionally standardized and manufactured, thereby remarkably reducing the manufacturing cost,

4) Ensure that food sludge is processed more smoothly as well as maintaining.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing the overall appearance of a grease trap according to the present invention; FIG.
2 is an exploded perspective view of a drainage assembly of the present invention.
3 is a cross-sectional view of the drainage assembly of the present invention.
4 is a perspective view showing the sludge trap of the present invention.

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 wherein like reference numerals in the various drawings refer to like elements.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an overall structure of a grease trap according to the present invention; FIG.

1, the grease trap of the present invention includes a housing 100, a partition 200, a sieve 300, a separation membrane 410, a sludge trap 420, and a drain assembly 500 Bar and each constitution will be described in detail below.

The housing 100 has a rectangular container shape with an open top and includes a through hole 100a connected to the inlet pipe 1 at one side wall and a through hole 100a connected to the outlet pipe 2 at the other side wall Respectively. That is, one side is connected to the inflow pipe 1, the wastewater discharged from the kitchen is introduced through the inflow pipe 1, the inflowed wastes float and separate the oil from the inside of the housing 100, So that the discharged water flows out through the outflow pipe 2 connected to the opposite side of the side to which the inflow pipe 1 is connected. At this time, the outlet pipe (2) should be disposed at a position slightly lower than the inlet pipe (1) for smooth drainage. It is preferable that the housing 100 is designed so that the upper portion thereof is opened and closed via a separate lid 110 so that sanitary management such as lifting and separation and cleaning can be smoothly performed. And the space inside the housing 100 can be divided by the separation membrane 410 to be described later, and it can be provided for each space and can be individually opened and closed for each space.

The partition wall 200 is formed parallel to the one side wall at a position spaced from the one side wall of the inlet pipe 1 by a predetermined distance and the lower part is spaced apart from the bottom surface of the housing 100 by a predetermined distance, Lt; / RTI > flow path. The partition wall 200 is provided to receive a sieve 300 to be described later and a lower portion of the partition wall 200 is opened in the housing 100 to secure a water passage through the sieve 300 And it is desirably formed in a detachable fashion for hygienic management of the housing 100.

The filter 300 is disposed at a portion where the wastewater discharged from the inlet pipe 1 is first introduced into the housing 100 and descends, that is, a part of the mesh network 300, which is disposed between the one side wall and the partition 200, Which primarily acts to filter out relatively large particulate impurities contained in the initial wastewater. It is preferable to use a 3-pie or 5-pie perforated network as the sieve 300. In order to store the sieve 300, the one side wall and the partition 200 are provided with the sieve 300 A supporting means such as a protruded bracket may be separately provided. At both ends of the upper side of the screen 300, an engaging means may be provided so as to protrude to correspond to the supporting means. In addition to the above-mentioned means, various types of latching members may be used to fix the screen 300 between the one side wall and the partition 200.

The oil separation membrane 410 is disposed parallel to the partition wall 200 at a position spaced a certain distance in the direction of the sewage flow from one side of the interior of the housing 100, It is preferable that the partition is formed with the same structure as that of the partition 200 to block the flow of the maintenance so that the float-separated oil is not separated in the direction of the sewage flow.

It is preferable that at least one such separation membrane 410 is provided, but it may be omitted in the case of a small-sized grease trap having a very short length of the housing 100, and if omitted, the role of the separation membrane 410 will be described later The straight pipe 510 is substituted.

The sludge trap 420 is formed to extend from the bottom surface of the housing 100 to the upper portion of the housing 100 in a vertical direction perpendicular to the direction of the drainage flow so as to block the flow of the food sludge precipitated on the floor and control the flow rate, And a portion formed to have a length that does not reach the site. At this time, the sludge trap 420 is disposed at a position slightly spaced apart from the partition 200 in the direction of the sewage flow, and the separation membrane 410 is disposed at a position spaced apart from the sludge trap 420 by a predetermined distance, The sludge trap 420 and the separation membrane 410 arranged in the above-described manner are provided with a space in which the maintenance of sewage can be spontaneously separated due to a very low flow velocity.

The waste water drainage assembly 500 is configured such that the waste water having the oil retained and separated through the space formed by the sludge trap 420 and the oil separation membrane 410 flows out through the outflow pipe 2, And is a feature of the present invention, which is provided in order to block intrusion of insects and to maximize treatment capacity of wastewater.

Fig. 2 is an exploded perspective view of the drainage assembly of the present invention, and Fig. 3 is a cross-sectional view of the drainage assembly of the present invention.

2 and 3, the drainage assembly 500 includes a vertical pipe 510 in which the lower end opening is submerged in drainage, a drain pipe 500 having one end connected to the vertical pipe 510 and the other end connected to the outlet pipe 2 And a horizontal pipe 520 connected to the horizontal pipe 520. That is, the lower portion of the vertical pipe 510 is disposed so as to be submerged in the drain water, thereby forming a sewing water, thereby preventing backflow of odors and pests. 2, it is preferable that the vertical tube 510 and the horizontal tube 520 are assembled to each other for hygienic reasons and the like. In the upper portion of the vertical tube 510, A cleaning agent 511 may be provided.

As shown in the figure, the vertical tube 510 can be manufactured using a T tube and a cleaning tool 511, which are conventionally standardized and easily manufactured. In particular, when the depth of the housing is relatively shallow, An elbow tube may be used. Any shape such that the lower portion is submerged in the drainage and the upper side is connected to the horizontal tube 510, such as the T tube and the elbow tube, may be used. So that the manufacturing cost can be greatly reduced and the present invention can be easily implemented. The horizontal pipe 520 may be connected to the vertical pipe 510 by a variety of methods such as a fitting method or a coupling method so as to have a diameter similar to the diameter of the horizontal pipe 520, The water should be connected in a watertight manner so that drainage does not leak out.

The horizontal pipe 520 of the present invention includes an outlet pipe 2 having one end connected to the vertical pipe 510 and the other end passing through a through hole 100a provided in the side wall of the housing and disposed outside the housing, A trap beam 521 can be formed in order to form a deeper seal depth when the horizontal pipe 520 is applied to a small size grease trap, And a guide path 521b.

The bottom wall 521a is formed perpendicular to the direction of the drainage flow at one end side connected to the vertical pipe 510. At this time, as shown in the drawing, the position of the horizontal tube 520 is spaced apart from the end of the horizontal tube 520 by a certain distance in the outward direction of the horizontal tube 520, The trap beam 521 is longer than the horizontal pipe 520 and protrudes from both ends of the horizontal pipe 520.

The height of the horizontal pipe 520 is preferably up to the central portion of the horizontal pipe 520 and may be any shape such as a square, a pentagon, a hexagon, and other polygons at a level that can be accommodated in the inner end surface of the horizontal pipe 520 However, it is preferable to have a semicircular shape for smooth flow of drainage.

The guide path 521b is provided for guiding the drainage flowing over the sewing floor 521a to the outlet pipe 2 so as to be housed in the horizontal pipe 520 from the sewing floor 521a in the longitudinal direction So that the extension end is connected to the outlet pipe 2. Referring to FIG. 2, the guide path 521b extends along the arc of the semicircular arc 521a along a portion except for the upper surface of the semicircular float 521a, that is, And is disposed inside the horizontal pipe 520 so that an extension end thereof can be connected to the outlet pipe 2. In addition, the guide path 521b may be formed to be inclined as a modified embodiment in order to smoothly progress drainage.

The end of the guide path 521b may be provided with an outflow connection part 522 extending from the side of the guide path 521b in the form of a cylindrical tube and connected to the outflow pipe 2, 522 are connected to the outflow pipe 2 through the through hole 100a provided in the side wall of the housing 100 so that the wastewater passing through the grease trap of the present invention can be finally discharged to the outside.

3, the guide path 521b extends along the longitudinal direction of the horizontal pipe 520 from the upper end surface of the sealing float 521a, And a tapered portion 521b (1) extending obliquely downward. That is, the tapered portion 521b (1) is formed to be inclined downward at a predetermined angle in the direction of gravity from the diameter of the semicircle of the seamed floe 521a, narrowed as the width thereof is extended, and disposed inside the guide path 521b, It is possible to guide the direction so that the wastewater flowing over the seaming floors 521a can flow more easily toward the outflow pipe 2 side.

The drainage assembly 500 of the present invention ensures a more stable drainage flow rate by further increasing the treatment capacity of the grease trap of the present invention, preventing the backflow of odors and pests, It is possible to prevent the phenomenon that the food sludge is swollen and swollen.

The tip of the trap beam 521 having the above-described structure is closed by the seam bottom 521a to form a deeper seal depth. The tip end of the trap beam 521 is connected to the outflow pipe 2, Which is opened to allow the inflow of the discharged water.

Particularly, the cross section of the trap beam 521 is preferably formed to have a smaller diameter than the cross section of the horizontal pipe 520. This allows the drainage to flow between the horizontal pipe 520 and the trap beam 521 so that the drainage can sweep all over the upper end of the guide path 521b, The flow rate of the drainage water can be prevented from fluctuating more than necessary and the processing capacity of the housing 100 can be further increased. The size of the trap beam 521 can be determined according to the diameter of the outlet pipe 2 and the trap beam 521 is implemented with a diameter similar to that of the outlet pipe 2 in order to design the most efficient drainage flow So that the horizontal pipe 520 having a diameter larger than the diameter of the trap beam 521 is preferably formed.

When the end surface of the trap beam 521 and the seal bottom 521a are formed to be smaller than the cross section of the horizontal pipe 520 as described above, the trap beam 521 is necessarily formed to be longer than the horizontal pipe 520 So that the space generated due to the difference in diameter between the horizontal pipe 520 and the trap beam 521 is not sufficiently wide, This is to ensure the overflow area of the trap beam 521.

The trap beam 521 may have a semi-cylindrical shape as shown in the drawings and the above description, and may have various shapes such as an open box shape and a half hexagonal column shape, Of course.

The drainage assembly 500 may further include a water filter 512. The water filter 512 may be detachably attached to the lower portion of the vertical pipe 510 as shown in FIG. It would be most desirable.

The water filter 512 has a bottom surface of a mesh structure capable of flowing drainage, and the bottom surface is composed of two layers, and a carrier storage space 512a into which a carrier such as activated carbon can be stored And is detachably fixed to the lower portion of the vertical tube 510 in a fitting manner. In this case, the bottom surface may be formed of a fiber material. In the case where activated carbon is used, organic matter derived from food or drink having a relatively large particle size and a large amount of adsorption of various chemical substances can be efficiently stored in the carrier storage space 512a. The activated carbon may be used in various forms such as powdered activated carbon and granular activated carbon. Particularly, the activated carbon is impregnated with an oxidizing agent, washed and dried to increase the acidic functional groups on the surface, It is preferable that the activated carbon is surface-modified activated carbon which has been subjected to carbonization to form physical pores on the surface as much as possible.

As the water filter 512 is provided, the waste water primarily separated and removed from the sludge and the oil passing through the sludge trap 420 and the oil separation membrane 410 is purified again, Can be controlled to be discharged in a cleaner state.

In addition, the sludge trap 420 can be formed in a novel structure to more efficiently collect and discharge the sludge to the outside.

4 is a perspective view showing the sludge trap of the present invention. 4, the sludge trap 420 includes a storage portion 421, a horizontal extension portion 422, a vertical extension portion 423, and a guard portion 424).

The housing part 421 is formed in a size and shape such that three sidewalls of the four sidewalls can come into contact with the side wall of the housing 100 in the shape of a rectangular basket having an open top, will be. That is, the three side walls of the housing part 421 are formed to abut one side wall connected to the inlet pipe 1 in the housing 100, and a part of the front side wall and the rear side wall vertically connected to the one side wall. The length of the partition wall 200 is longer than the length of the partition wall 200 from one side wall of the housing 100 so that one side wall of the partition wall 200, As shown in FIG. The bottom of the receiving part 421 is made of a very dense mesh material and is detachable from the four side walls of the receiving part 421. [ So that the water can be discharged to the lower part of the receiving part 421 when the receiving part 421 is lifted up to the upper part of the housing 100 for cleaning and then separated, So that the surfaces can be hygienically cleaned and replaced. The mesh material may mean a normal mesh formed of stainless steel, but it is also possible to use tough fibers such as hemp or the like in order to more closely sift out the sludge and dispose of it more conveniently.

The horizontal extending portion 422 extends from the upper end of the sidewall of the housing portion 421 that is not in contact with the inner wall of the housing 100 to the inside of the receiving portion 421, The food sludge can be more efficiently stored in the sludge storage space 421a provided by the storage unit 422 and the storage unit 421.

The vertical extending portion 423 is bent at the extending end of the horizontal extending portion 422 and extends upward and the guard portion 424 is bent from the extended end of the vertical extending portion 423 toward the receiving portion 421 side, It is extended. The food sludge flowing along the sewage flow direction is blocked by the vertical extension part 423 and the guard part 424 and then guided so as to be able to sink to the lower part and the submerged food sludge is introduced into the inflow pipe 1 The sludge is stored in the sludge storage space 421a by the pressure of the wastewater flowing through the sludge storage compartment 421a.

The handle 425 can be attached to one side of the upper surface of the sludge trap 420, that is, the guard 424, and the sludge trap 420, And the partition wall 200 is assembled and removed after the lid 110 of the housing 100 is opened and then the handle 425 is connected to one side of the horizontal extension part 422, The sludge trap 420 can be removed to the outside of the housing 100, thereby making it possible to more easily perform the food sludge treatment. At this time, the water stored in the storage portion 421 together with the food sludge is discharged to the lower portion through the bottom surface formed of the mesh material, so that the sludge trap 420 can be separated from the housing 100 lightly and easily.

As described above, the structure and action of the grease trap according to the present invention are described in the above description and drawings, but the present invention is not limited to the above description and drawings, It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

1: inlet pipe 2: outlet pipe
100: housing 100a: through hole
110: lid 200: partition wall
300: filter net 410: retentive membrane
420: sludge trap 421:
421a: sludge storage space 422: horizontal extension part
423: vertical extension part 424: guard part
425: Handle 500: Drain assembly
510: Vertical tube 511:
512: water filter 512a: carrier storage space
520: Horizontal tube 521: Trap beam
521a: a seam floor 521b: as a guide
521b (1): tapered portion 522:

Claims

As a grease trap,
A housing having an upper portion opened and closed by a lid, one of the side walls being connected to the inlet pipe and the opposite side wall being connected to the outlet pipe;
A partition wall formed parallel to one side wall of the housing and spaced apart from a bottom surface of the housing by a predetermined distance;
A filter disposed between the inlet tube side wall and the partition wall;
A vertical pipe having a lower drain port for moving the wastewater which has been moved through the sieve net in a state of being submerged in drain water,
One end of which is connected to one side of the vertical tube and the other end is connected to the outlet tube,
And is embedded in the horizontal tube,
A sidewall extending vertically to the drainage flow direction at a position where the sidewall penetrates into the vertical tube from the boundary between the vertical tube and the horizontal tube,
The top end of the horizontal pipe is closed and the rear end of the horizontal pipe is closed so that the upper part is opened and the remaining part has a space for receiving the drain water, And a drainage assembly including a trap beam made of a guide extending in the longitudinal direction,
The upper surface of the guide has,
And a tapered portion extending obliquely downward along the longitudinal direction of the horizontal tube.

delete

The method according to claim 1,
Wherein the vertical tube and the horizontal tube are assembled and formed.

The method according to claim 1,
Wherein the trap sight is formed to have a smaller diameter than the horizontal pipe,
Wherein a drainage inflow space is formed between the horizontal pipe and the trapbeam so that the drainage water can flow over the tops of the bottoms and the bottoms.

delete

The method according to claim 1,
The grease trap
And a sludge trap formed in the lower portion perpendicular to the drainage flow direction to block the flow of the food sludge settled on the bottom and to control the flow rate.

The method according to claim 6,
Wherein the sludge trap comprises:
A horizontal extending portion extending from the upper end of the one side wall not in contact with the inner wall of the housing in the receiving portion to the inside of the receiving portion; And a guard portion which is bent and extended from the extended end of the vertical extending portion toward the receiving portion, wherein the vertical extending portion is bent at an extending end of the horizontal extending portion and extends upward,
And the bottom surface of the storage portion is made of a dense mesh material that can be detached.

The method according to claim 1,
The drainage assembly includes:
Further comprising a water filter having a bottom surface of a mesh structure capable of flow of drainage and being detached from the bottom of the vertical tube, and a bottom storage space provided with a carrier storage space.

9. The method of claim 8,
In the carrier storage space,
Characterized in that the surface-modified activated carbon is stored.