KR19990071308A - Drawer Temperature Control of Drawer Kimchi Storage - Google Patents

Abstract

The present invention relates to a drawer temperature control device of a drawer type kimchi storage, a plurality of drawers formed in multiple layers by supplying cold and hot air through the cold air duct and hot air duct, drawer type for storing or aging the kimchi stored in each drawer In the kimchi storage, each drawer, and inputting the ripening course and the refrigerated storage course, the operation unit having a plurality of buttons for performing this, and to sense the temperature inside the drawer to generate a corresponding temperature detection signal A microcomputer for generating a control signal for adjusting the amount of cold air or hot air according to the temperature sensor, the temperature corresponding to the course selected through the operation unit and the internal temperature of the drawer detected by the temperature sensor, and the microcomputer Of the cold air control damper to adjust the amount of cold air supplied through the cold air duct by a control signal from the While controlling the aperture ratio, it is composed of a damper driver for adjusting the opening ratio of the hot air control damper to control the amount of hot air supplied through the hot air duct, to store different types of kimchi in each drawer divided into multiple layers, By controlling the amount of cold air and the amount of hot air through a cold air control damper or a hot air control damper, it is to be able to mature or refrigerated at different temperatures for each drawer.

Description

Drawer Temperature Control of Drawer Kimchi Storage

The present invention relates to a drawer temperature control apparatus of a drawer type kimchi storage so that the kimchi stored in each of the drawers separated into a multi-layer can be stored at a different temperature.

In general, to store frozen and refrigerated foods or fermented foods (for example, kimchi, etc.), they must be stored at a temperature suitable for storing them, and a refrigerator having a freezer and a refrigerating chamber is mainly used to perform these functions. Used.

On the other hand, when the refrigerated food and the fermented food is stored together in the refrigerator compartment of the refrigerator, the odor generated by the fermentation of the fermented food not only generates odors in the refrigerating chamber, but also odor is exhausted in other refrigerated foods inherent in the refrigerated food There is a need to store bulky fermented foods (kimchi) in a separate reservoir due to the increase in refrigerated foods and fermented foods stored in the refrigerator compartment.

In addition, as part of the way to enjoy properly ripe kimchi for a long time, the kimchi dog is buried in the ground and stored in it, so that the kimchi can be properly aged for a long time. Rather than burying Kimchi dogs in the ground because of constraints, it is difficult to store them in residential areas.

Recently, in order to solve the above problems, research on kimchi storage that can store kimchi in a separate storage space, rather than a refrigerator, has been variously studied in various technical fields related thereto. As shown.

As can be seen with reference to Figure 1, the conventional kimchi storage in the prior art, the storage body 10 and the storage body 10 is used to store or take out the kimchi in the storage body (10).

In the upper part of the door 20, the operation unit 30 is provided with a plurality of buttons for performing various functions as well as selectively inputting the ripening course and the refrigerated storage course of the kimchi storage, and the storage body 10 of the A moving handle 15 is installed on the side to easily move the storage body 10 during the movement, and the door handle 25 on the front part of the door 20 to facilitate opening and closing of the door 20. Is installed.

Meanwhile, as shown in FIG. 2, the interior 40 of the storage body 10 is a space without a partition, such as a partition, and contains kimchi in a separate kimchi container, and then stores the kimchi container in the interior 40. It is loaded in multiple layers, and the kimchi contained in the loaded kimchi container is matured and refrigerated as a whole.

However, by loading a kimchi container containing kimchi in a multi-layer and cooling or heating the whole kimchi container in a conventional conventional kimchi storage chamber, since the kimchi container stacked in a multi-layer is refrigerated or aged, in order to take out the kimchi loaded on the lower layer, Inconvenience in use, such as having to lift the kimchi container loaded on the side is generated, there is a problem that can not mature or refrigerate different kinds of kimchi respectively.

Accordingly, the present invention is to solve the problems of the prior art as described above, the drawer-type kimchi that can be stored or aged at different temperatures for each layer by storing different types of kimchi in each drawer separated into a multi-layer The purpose is to provide a drawer temperature control of the reservoir.

Drawer temperature control device of the drawer type kimchi storage according to the present invention in order to achieve the above object, by forming a plurality of drawers in a multi-layer to supply cold and hot air through the cold air duct and hot air duct, to mature the kimchi stored in each drawer Or in the drawer-type kimchi storage for refrigeration, each drawer, the operation unit is provided with a plurality of buttons for selecting and inputting the ripening course and the refrigerated storage course, and senses the temperature inside the drawer and corresponding temperature A temperature sensor for generating a detection signal, and a control signal for controlling the amount of cold air or hot air according to the temperature corresponding to the course selected through the operation unit and the inside temperature of the drawer detected by the temperature sensor The amount of cold air supplied through the cold air duct is controlled by a microcomputer and a control signal from the microcomputer. In order to control the aperture ratio of the cold air control damper On the other hand, it is characterized in that the drive unit consists of a damper for adjusting the opening rate of the hot air control damper to control the on-air amount to be supplied through the hot air duct.

1 is an external perspective view of a conventional kimchi storage,

Figure 2 is a view showing a state in which the door of the conventional conventional kimchi storage,

3 and 4 is an external perspective view of the kimchi storage drawer according to the present invention,

FIG. 5 is a cross-sectional view of the drawer type kimchi storage shown in FIG. 4 based on AA ′ line; FIG.

FIG. 6 is a cross-sectional view of the drawer type kimchi storage shown in FIG. 4 based on the BB ′ line; FIG.

FIG. 7 is a cross-sectional view taken along line CC ′ of the drawer type kimchi storage shown in FIG. 4;

8 is a view showing a drawer installed in the drawer type kimchi storage according to the present invention,

Figure 9 is a schematic block diagram of a drawer temperature control device of the drawer type kimchi storage in accordance with a preferred embodiment of the present invention.

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

300: upper drawer 303, 403, 503: display unit

304, 404, 504: damper driver 317, 417, 517: temperature sensor

310, 410, 510: cold air control dampers 312, 412, 512: hot air control dampers

320, 420, 520: Micom 400: Central Drawer

500: lower drawer 600: control unit

710: compressor driving unit 720: defrost heater driving unit

730: evaporator fan motor driving unit 740: heater driving unit

750: heater fan motor drive unit

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 is an external perspective view of the drawer type kimchi storage according to the present invention, consisting of a main body 100, the front door 200 installed on the front of the main body 100, the inside of the front door 200 To store the kind of kimchi, and refrigerated at different temperatures, respectively, the upper drawer 300, the middle drawer 400, and the lower drawer 500 is formed.

And, as shown in Figure 3, the front door 200 is provided with a handle 150 used for opening and closing the front door 200, the central portion of the front door 200 is a transparent material such as thick glass Is formed of 150 so that the user can know the internal temperature or the current state of each drawer (300, 400, 500) displayed through the display unit 303, 403, 503 to be described later even when the front door 200 is closed It is.

FIG. 5 is a cross-sectional view of the drawer type kimchi storage of FIG. 4 taken along line AA ′, and a compressor 110 for compressing a refrigerant at a high temperature and high pressure is provided on the lower side of the main body 100 through a condenser and a capillary tube, which are not shown. Inside the drawers 300, 400, and 500 through the cold air duct 140, the evaporator 120 for evaporating the refrigerant condensed and then depressurized to low pressure, and the cold air generated by heat exchange while evaporating through the evaporator 120. Evaporator fan motor 130 for blowing in the furnace is installed.

The cold air duct 140 is bent toward the front side of each drawer (300, 400, 500) so that the blowing direction of the cold air blown from the evaporator 120 is switched to the front side of the main body 100, each drawer (300, 400, It is connected to the cold air control dampers (310, 410, 510) installed on the upper front side of the 500.

And, each of the cold air control dampers (310, 410, 510) installed on the upper front side of each drawer (300, 400, 500) from the micom (320, 420, 520) of each drawer (300, 400, 500) to be described later The opening ratio is adjusted by the control signal of the control unit to adjust the amount of cold air blown by the driving of the evaporator fan motor 130 to supply the inside of each drawer (300, 400, 500).

In addition, the cold air suction duct 150 is installed on the lower side of the inner rear wall of each drawer 300, 400, 500 so that the cold air supplied through the cold air control dampers 310, 410, 510 is supplied to the evaporator 120 side again. It is.

Compressor 110, the evaporator 120, the evaporator fan motor 130, the cold air duct 140, through each of the cold air control dampers (310, 410, 510) installed as described above of each drawer (300, 400, 500) Cold air is supplied to the inside, and the cold air is continuously circulated by the cold air suction duct 150, whereby the interior of each drawer 300, 400, 500 is cooled.

On the other hand, the drawer frame to which each drawer 300, 400, 500 is fitted is predetermined such that the rear side of the drawer 300, 400, 500 is lower than the front side of the main body 100 so as to be closed by its own weight when the drawers 300, 400, 500 are closed. It is formed to be inclined at an angle, and the wheels (314, 414, 514) on both sides of the rear of each drawer (300, 400, 500) so that the drawers (300, 400, 500) can be easily opened and closed with a small force. Is installed.

The wheels 314, 414, and 514 installed in the drawers 300, 400, and 500 are fixed to the closing fixing grooves 315, 415, and 515 when the drawers 300, 400, and 500 are closed. When the drawers 300, 400, and 500 are opened, they are opened in the state of being caught by the opening fixing grooves 316, 416, and 516.

FIG. 6 is a cross-sectional view of the drawer type kimchi storage shown in FIG. 4 based on the line BB ′, and a heater 160 generating warmth is installed at a lower portion of the main body 100, and is generated from the heater 160. Heater fan motor 165 for blowing the warm air to each drawer (300, 400, 500) through the hot air duct 170 is installed.

The hot air duct 170 is bent toward the front side from the top of each drawer (300, 400, 500) so that the blowing direction of the warm air blown from the heater 160 is switched to the front side of the main body 100, each drawer (300, 400, It is connected to the warm air control dampers (312, 412, 512) installed on the upper front side of the 500.

In addition, each of the warm air control dampers 312, 412, 512 provided on the front upper side of each drawer (300, 400, 500) is controlled by the control signals from the microcomputer (320, 420, 520) of the respective drawer storage to be described later. The opening ratio is adjusted to adjust the amount of hot air blown by the driving of the heater fan motor 165 to supply the inside of each drawer (300, 400, 500).

Then, the warm air supplied into each of the drawers 300, 400, and 500 through the hot air control dampers 312, 412, and 512 is supplied back to the heater 160 through the hot air suction duct 180.

Through the heater 160, the heater fan motor 165, the hot air duct 170 installed as described above through the hot air control dampers (312, 412, 512), the warm air to the inside of each drawer (300, 400, 500) The hot air is continuously circulated to the heater 160 through the hot air suction duct 180, and the inside of each drawer 300, 400, 500 is heated.

FIG. 7 is a cross-sectional view of the drawer type kimchi storage shown in FIG. 4 with reference to the CC 'line, and the cold air duct 140 and the hot air duct 170 are disposed on the upper part of each drawer 300, 400, 500. It is installed bent to switch the blowing direction from the rear to the front side of the), the cold air duct 140 and the hot air duct 170 from the micom (320, 420, 520) of each drawer (300, 400, 500) to be described later The opening ratio is controlled by the control signal, and the cold air regulating dampers 310, 410, and 510 and the warm air regulating dampers 312, 412, and 512 adjust the amount of cold air supplied to each of the drawers 300, 400, and 500. ) Are installed respectively.

On the other hand, Figure 8 is a view showing each drawer (300, 400, 500), as shown in Figure 8, the handle (301, 401, 501) for opening and closing each drawer (300, 400, 500), Selecting and inputting the ripening course and the refrigerated storage course of each drawer (300, 400, 500), through the operation unit (302, 402, 502) for selecting various functions, and through each operation unit (302, 402, 502) In order to display the selected input function and to easily open and close the display units 303, 403, 503 indicating the current state of each drawer 300, 400, 500, and each drawer 300, 400, 500 with a small force. It consists of wheels 314, 414, 514 installed at both rear sides of each drawer 300, 400, 500, and has a temperature sensor on one inner wall to detect the internal temperature of each drawer 300, 400, 500. 317, 417, and 517 are provided.

On the other hand, Figure 9 is a schematic block diagram of a drawer temperature control device of the drawer type kimchi storage according to an embodiment of the present invention, the upper drawer 300, the central drawer 400, the lower drawer 500, the control unit 600 ), A compressor driver 710, a defrost heater driver 720, an evaporator fan motor driver 730, a heater driver 740, and a heater fan motor 750.

In FIG. 9, the upper drawer 300 includes an operation unit 302, a display unit 303, a damper driver 304, a temperature sensor 317, and a microcomputer 320, which constitute the upper drawer 300. The operation unit 302, the display unit 303, and the temperature sensor 317 have already been described above, and description thereof will be omitted.

On the other hand, the microcomputer 320 generates a control signal for displaying the current state of each course and the upper drawer 300 selected and input through the control unit 302 to the display unit 303, while the control unit 302 Generate a control signal for adjusting the opening ratio of the cold air control damper 310 and the warm air control damper 312 according to the internal temperature detected by the temperature sensor 317 to perform the selected input course, cold air control damper The opening and closing of the 310 and the warm air control damper 312 is transmitted to the control unit 600.

The damper driver 304 adjusts the opening ratios of the cold air control damper 310 and the warm air control damper 312 by the control signal from the microcomputer 320, and the amount of cold air supplied to the interior 350 of the drawer 300. Adjust the warm air volume.

On the other hand, since the middle drawer 400 and the lower drawer 500 is composed of the same constituent members as the upper drawer 300 as described above, the description thereof will be omitted in order to avoid overlapping the substrate.

On the other hand, the control unit 600 detects the opening and closing of the cold air control damper 310 and the warm air control damper 312 through the microcomputer (320, 420, 520) of each drawer (300, 400, 500), accordingly While generating a control signal for controlling the driving of the compressor 110 and the heater 160, and generates a control signal for controlling the driving of the evaporator fan motor 130 for blowing cold air generated from the evaporator 120 The control signal for controlling the driving of the heater fan motor 165 for blowing the warm air generated from the heater 160 is generated.

In addition, the controller 600 generates a control signal for driving the defrost heater at a predetermined time (for example, six hours or twelve hours) set to remove frost formed on the evaporator 120.

In detail, the control unit 600 detects that each of the cold air control dampers 310, 410, and 510 is closed through the microcomputers 320, 420, and 520 of each of the drawers 300, 400, and 500. While generating a control signal to stop the driving of), and if any one of the cold air control damper (310, 410, 510) is opened through each of the microcomputer (320, 420, 520), the compressor 110 Generate a control signal for continuously driving.

In addition, the controller 600 detects that all of the warm air control dampers 312, 412, and 512 are closed through the microcomputers 320, 420, and 520 of each of the drawers 300, 400, and 500. While generating a control signal for stopping driving, if the heater is detected to be opened through any of the microcomputers 320, 420, and 520, the heater 160 is continuously driven. To generate a control signal.

In FIG. 9, the compressor driver 710 drives the compressor 110 to circulate the refrigerant by the control signal from the controller 600, and the defrost heater driver 720 is controlled by the control signal from the controller 600. The defrost heater shown in the drawing removes the frost formed on the evaporator 120, and the evaporator fan motor driver 730 drives the evaporator fan motor 130 by a control signal from the controller 600 to evaporator 120. The cold air generated from) is supplied to the interiors 350, 450, and 550 of the drawers 300, 400, and 500 through the cold air duct 140.

The heater driver 740 drives the heater 160 by the control signal from the controller 600 to generate warmth, and the heater fan motor driver 750 generates the heater by the control signal from the controller 600. The warmth generated from the 160 is supplied to the interiors 350, 450, and 550 of the drawers 300, 400, and 500 through the warm air duct 170.

An operation process of the drawer temperature control device of the drawer type kimchi storage according to the present invention configured as described above will be described in detail with reference to FIGS. 3 to 9.

First, when commercial power is applied to the drawer type kimchi storage, each drawer 300, 400, 500 and the control signal from the microcomputer 320, 420, 520 and the control unit 600 of each drawer (300, 400, 500) and Kimchi storage is initialized.

Next, the user opens the drawers 300, 400, and 500 by using the handles 301, 401, and 501 while the front door 200 is opened, and then the various types of kimchi of the main body 100. After dividing into each drawer (300, 400, 500), and then close each drawer (300, 400, 500) using the handle (301, 401, 501).

Then, when a desired course is selected and input through the operation units 302, 402, 502 of each drawer 300, 400, 500, respectively, from the microcomputer 320, 420, 520 of each drawer 300, 400, 500. The course selected and input by the control signal of is displayed through the display units 303, 403, and 503.

Next, the user inputs all desired ripening or refrigerated storage courses through the operation units 302, 402, and 502 of each of the drawers 300, 400, and 500, and then inputs an operation button to each drawer 300, 400. , The control unit 600 is input via the microcomputers 320, 420, and 520 of the control unit 500, and the compressor 110 is connected to the control unit 600 through the compressor driver 710 and the heater driver 740 by a control signal from the controller 600. The heater 160 is driven.

In detail, when the course selected and input through each operation unit 302, 402, 502 is a maturing course, the heater 160 is driven through the heater driving unit 740, and selected through each operation unit 302, 402, 502. If the input course is a refrigerated storage course, the compressor 110 is driven through the compressor driver 710.

First, when the compressor 110 is driven through the compressor driver 710 by a control signal from the controller 600, the refrigerant is compressed to high temperature and high pressure through the compressor 110, and then the condenser and capillary tube (not shown) are removed. Condensation is carried out through a low pressure, cold air is generated through the evaporator 120, at this time, the evaporator fan motor 130 is driven through the evaporator fan motor drive unit 730 by a control signal from the control unit 600 to evaporator ( The cold air generated from the 120 is supplied to the cold air control dampers 310, 410, and 510 of each of the drawers 300, 400, and 500 through the cold air duct 140, and then the inside of each of the drawers 300, 400, and 500. 350, 450, and 550.

When the heater 160 is driven through the heater driver 740 by the control signal from the controller 600, the heater 110 is driven to generate warmth from the heater 160, and from the controller 600. The heater fan motor 165 is driven through the heater fan motor driving unit 750 by a control signal of the heaters (160, 450, 550) of the inside of each drawer (300, 400, 500) Is supplied.

On the other hand, the internal temperature of each drawer (300, 400, 500) is sensed through the temperature sensor (317, 417, 517) installed on one side wall of each drawer (300, 400, 500), each drawer (300, 400, Input to the microcomputer 320, 420, 520 of 500, each microcomputer (320, 420, 520) and the temperature detected by each temperature sensor 317, 417, 517 and each operation unit (302, 402, 502) Generates a control signal for adjusting the opening amount of each of the cold air control dampers (310, 410, 510) and the warm air control dampers (312, 412, 512) according to the difference with the temperature corresponding to the selected input course through (See Table 1).

5 ℃ or more 4 ℃ -3 ℃ 2 ℃ -1 ℃ 0 ℃ Rapid Refrigeration Storage or Rapid Maturation Opening Opening ½ open Closure Normal refrigeration or normal maturation Opening ½ open ¼ open Closure Low speed refrigeration or low speed aging ½ open ¼ open ⅛open Closure

Therefore, the openings of the respective cold air control dampers 310, 410, and 510 and the warm air control dampers 312, 412, and 512 are controlled by the control signals from the microcomputers 320, 420, and 520, and accordingly, the evaporator 120 is controlled. The amount of cold air blown from and the amount of hot air blown from the heater 160 are adjusted and supplied to the interiors 350, 450, and 550 of the respective drawers 300, 400, and 500.

At this time, the microcomputer 320, 420, 520 of each of the drawers (300, 400, 500) during the operation of the drawer type kimchi storage, the respective drawers (300, 400, 517) detected through each temperature sensor (317, 417, 517) Generates a control signal for displaying the internal temperature of the 500 and the current state of each of the drawers 300, 400, and 500, and each drawer 300, 400 by a control signal from each of the microcomputers 320, 420, 520. , The internal temperature of 500 and the current state of each drawer 300, 400, 500 are displayed through the display unit 303, 403, 503 of each drawer 300, 400, 500 (e.g., rapid refrigerated storage). Medium, rapid ripening, etc.).

On the other hand, the control unit 600 through the microcomputer 320, 420, 520 of each drawer (300, 400, 500) of each of the cold air control damper (310, 410, 510) and the warm air control damper (312, 412, 512) Detects whether or not the opening and closing, accordingly generates a control signal for controlling the driving of the compressor 110 and the heater 160, and according to the control signal from the control unit 600, the compressor driving unit 710 and the heater driving unit 740 Through the driving of the compressor 110 and the heater 160 is controlled.

That is, the controller 600 detects that all of the cold air control dampers 310, 410, and 510 are closed through the microcomputers 320, 420, and 520, and outputs a control signal for stopping the driving of the compressor 110. And the driving of the compressor 110 is stopped through the compressor driver 710 by a control signal from the controller 600.

When the controller 600 detects that any one of each of the cold air control dampers 310, 410, and 510 is opened, the controller 600 generates a control signal for continuously driving the compressor 110, and receives the control signal from the controller 600. The compressor 110 is continuously driven by the compressor driver 710 by the control signal.

In addition, the controller 600 detects that all of the warm air control dampers 312, 412, and 512 are closed through the microcomputers 320, 420, and 520, and supplies a control signal to stop driving of the heater 160. And the driving of the heater 160 is stopped through the heater driver 740 by the control signal from the controller 600.

When the controller 600 detects that any one of the warm air control dampers 312, 412, and 512 is open, the controller 600 generates a control signal for continuously driving the heater 160, and receives the control signal from the controller 600. The heater 160 is continuously driven by the heater driver 740 by the control signal.

On the other hand, during operation of the drawer type kimchi storage, the control unit 600 is a control signal for driving the defrost heater to remove the frost formed on the evaporator 120 at a set predetermined time (for example, 6 hours or 12 hours) The defrost heater is periodically driven through the defrost heater driving unit 720 by the control signal from the controller 600, thereby eliminating the frost formed on the evaporator 120.

When the user pulls the drawers 300, 400, and 500 forward by using the handles 301, 401, and 501 in the state in which the front door 200 is opened, the closed fixing groove 315 installed at the rear lower side of each drawer frame. , Wheels 314, 414, 514 of each drawer 300, 400, 500 hanging on 415, 515 are disengaged, and then each drawer 300, 400, 500 is driven by wheels 314, 414, 514. It is easily moved to the front side.

Then, when the user pulls each drawer 300, 400, 500 forward as much as possible, the wheels 314, 414, and 514 installed in the drawers 300, 400, and 500 are opened in the opening fixing grooves 316, 416, and 516. Each drawer 300, 400, 500 is locked in an open state.

In this state, the user puts kimchi in each drawer (300, 400, 500) or take out the stored kimchi, and then close each drawer (300, 400, 500) using the handle (301, 401, 501), Each wheel 314, 414, 514 caught in the opening fixing grooves 316, 416, 516 formed in the front lower side of each drawer frame is separated, and then each drawer 300, 400 by the wheels 314, 414, 514. 500 is easily moved to the rear side.

At this time, since the drawer frame into which the drawers 300, 400, and 500 are inserted is inclined at a predetermined angle with the rear side lower than the front side of the kimchi storage, each drawer 300 moved to the rear side by a user's operation. 400, 500 is moved to the rear side by the weight of each wheel 314, 414, 514 by its own weight, each wheel 314, in the locking fixing grooves 315, 415, 515 formed in the rear lower side of each drawer frame Each of the drawers 300, 400, and 500 is locked in a closed state by the locking of the 414 and 514.

Therefore, according to the present invention, by storing the different types of kimchi in each drawer separated into a multi-layer, and by controlling the amount of cold air and hot air respectively through a cold air control damper or a hot air control damper, each drawer at a different temperature There is an effect that can be aged or refrigerated.

Claims (1)

In the drawer-type kimchi storage for aging or refrigerated kimchi stored in each drawer by supplying cold and warm air through the cold air duct and hot air duct by forming a plurality of drawers in multiple layers, Each drawer is, An operation unit having a plurality of buttons for selecting and inputting a aging course and a refrigerated storage course; A temperature sensor for sensing a temperature inside the drawer and generating a temperature detection signal corresponding thereto; A microcomputer for generating a control signal for adjusting the amount of cold air or the amount of warm air according to a temperature corresponding to a course selected and input through the operation unit and an internal temperature of the drawer detected by the temperature sensor; The aperture ratio of the cold air control damper is adjusted to adjust the amount of cold air supplied through the cold air duct by a control signal from the microcomputer, and the aperture ratio of the warm air control damper is adjusted to adjust the amount of hot air supplied through the hot air duct. Drawer temperature control device of the drawer type kimchi storage, characterized in that consisting of a damper driving portion to adjust.