JPWO2011086642A1 - refrigerator - Google Patents

Abstract

A storage room having a door (25), a door opening / closing detection means (24) for detecting opening / closing of the door (25), and an illumination device for lighting in the storage room, which is controlled to be turned on / off by the door opening / closing detection means (24) When the door open / close detection means (24) detects the open state of the door (25) and the door (25) is opened for a predetermined time or longer, the lighting device (20) is turned on and off. In the drive control, dimming control for gradually decreasing the lighting time ratio of the lighting device (20) and dimming, and gradually increasing the lighting time ratio. And a control device (26) that repeats the brightening control to increase the brightness.

Description

  The present invention relates to a refrigerator provided with a lighting device.

  In recent years, as a lighting device in a refrigerator, a device using a semiconductor light emitting element has been proposed for reasons such as low heat generation, no infrared wavelength, and low voltage driving, instead of a conventional incandescent lamp or light bulb.

  As a refrigerator using a conventional light-emitting diode as a lighting device, there is a refrigerator in which a plurality of light-emitting diodes are arranged in a square shape and installed on the top surface of the interior to irradiate the interior (for example, see Patent Document 1).

  FIG. 10 is a perspective view of a lighting device for a conventional ice making machine described in Patent Document 1, and FIG. 11 is a conceptual diagram in which the lighting device of FIG. 10 is installed on the top surface of the ice making machine.

  In the illuminating device 100 of FIG. 10, the mounting substrate 101 has a flat plate shape, a circuit pattern (not shown) is formed on one surface or both surfaces, and an epoxy resin-based substrate or an insulating metal substrate with good thermal conductivity is used. The white light emitting diode 102 is formed in a bullet shape and has a structure in which white light is obtained by exciting a fluorescent material using blue light from a GaN-based blue light emitting diode. Derived.

  The heat insulating plate 104 is formed in a flat plate shape using a resin such as urethane, and is provided between the mounting substrate 101 and the light emitting diode 102 with a plurality of insertion holes arranged in parallel. Here, the light-emitting diodes 102 are mounted with the energization terminals 103 inserted through the insertion holes of the heat insulating plate 104, soldered to the circuit pattern of the mounting substrate 101, and a plurality of the light-emitting diodes 102 are arranged in parallel on the mounting substrate 101. In addition, when the calorific value of the light emitting diode 102 is small, the heat insulating plate 104 may be eliminated.

  In FIG. 10, the lighting device 100 is disposed on the top surface 112 in the warehouse of the ice making machine 111.

  The operation of the refrigerator using the light emitting diode configured as described above as a lighting device will be described below.

  First, when the refrigerator door is closed, the light emitting diode 102 is not energized and the interior is not illuminated. When the door is opened, an electronic switch such as a mechanical switch or a Hall IC determines that the door is open, a forward current flows through the light emitting diode 102, white light is emitted, and the interior is irradiated.

  Usually, lighting and extinguishing of LED lighting (illuminating device) are interlocked with the open / close state of the door of the storage room in which the LED lighting is installed, as in the case of conventional incandescent lamps and light bulbs. Details of the operation will be described. First, when the door opening / closing detection means detects that the door of the storage room is open, the information is transmitted to the control device. The control device executes control to turn on the illumination of the storage room. On the other hand, when the door opening / closing detection means detects that the door of the storage chamber is closed, the information is transmitted to the control device. The control device executes control to turn off the illumination of the storage room.

There is an example in which control is performed to gradually turn on or off the LED illumination using a timer when turning on or off the LED illumination (for example, Patent Document 2). FIG. 27 shows an example of a refrigerator having two interior lightings. In FIG. 27, 10 and 20 are a 1st storage chamber and a 2nd storage chamber, respectively. Reference numerals 11 and 21 denote a door of the first storage chamber and a door of the second storage chamber, respectively.
Reference numerals 12 and 22 respectively denote door opening / closing detection means for the first storage chamber and door opening / closing detection means for the second storage chamber, which output electronic signals according to the opening / closing states of the doors of the respective storage chambers. Reference numerals 13 and 23 denote LED illumination of the first storage chamber and LED illumination of the second storage chamber, respectively, which are turned on or off by an input electronic signal.
30 is a main control microcomputer as a control device that controls the electric system of the refrigerator, and outputs operation signals to the compressor, fan, heater, and cooling switching device based on temperature information and time information, as well as the door open / close detection. In response to the electronic signals from the means 12 and 22, the LED lights 13 and 23 are also controlled to be turned on or off.
31 and 32 are timers for measuring the ON time or OFF time of an electronic signal when the LED lights 13 and 23 are gradually turned on or off, and are mounted inside the main control microcomputer 30. Reference numeral 80 denotes a temperature sensor that outputs an electronic signal corresponding to the ambient temperature of the sensor. A plurality of the temperature sensors 80 may be provided for measuring the outside air temperature or for measuring the temperature of an arbitrary place in the refrigerator.
Reference numeral 40 denotes a compressor control microcomputer that receives an electronic signal from the main control microcomputer 30 and controls the operation of the compressor. Reference numeral 41 denotes a compressor that receives a signal from the compressor control microcomputer 40 and compresses the refrigerant.
Reference numeral 50 denotes a fan that performs ON / OFF switching and rotation speed change by an electronic signal from the control microcomputer 30. The fan 50 is for flowing cool air in the refrigerator or applying wind to the compressor to promote heat dissipation, and a plurality of fans 50 may be provided. Reference numeral 60 denotes a heater that is provided to receive an electronic signal from the main control microcomputer 30 and prevent freezing and dew condensation of each part of the refrigerator, and a plurality of heaters may be provided. 70 is a cooling switching device that receives an electronic signal from the main control microcomputer 30 and switches the flow path of the refrigerant in the refrigerator.

  Next, the operation when the LED illumination is gradually turned on will be described with reference to FIG. First, when the door 11 is opened, the door opening / closing detection means 12 detects that the door is opened and notifies the main control microcomputer 30 as electronic information. At this time, the main control microcomputer 30 starts control for gradually turning on the LED illumination 13. FIG. 24 shows an example of an electronic signal output from the main control microcomputer 30 to the LED illumination 13.

  As shown in FIG. 24, the main control microcomputer 30 first outputs a signal for turning on the LED illumination 13 for ON 1 hour in order to turn on the LED illumination 13 gradually. Subsequently, a signal for turning off the LED illumination 13 is output for OFF 1 hour. Further, a signal for turning on the LED illumination 13 is output only for ON 2 hours.

  Here, ON2 time ≧ ON1 time. Further, a signal for turning off the LED illumination 13 is output for OFF 2 hours. Here, it is assumed that OFF2 hours ≦ OFF1 hours. In this way, the ON time is gradually increased, the OFF time is gradually decreased, and finally, the control is performed so that the LED illumination 13 is gradually turned on by always turning it on. The same applies to the LED lighting in the second storage room. In addition, the measurement of each ON time and OFF time of LED illumination of a 1st storage chamber is performed with the timer 31, and the measurement of each ON time and OFF time of LED illumination of a 2nd storage chamber is performed with the timer 32. FIG.

JP 2001-82869 A JP 2009-115372 A

  However, in the above-described conventional configuration, the lighting device is repeatedly turned on and off each time the door of the refrigerator is opened and closed. In particular, there is no description of the control of the lighting device when the door is kept open. For this reason, the user cannot recognize that the door is in an open state, thereby increasing the amount of outside air entering into the cabinet, which tends to increase the temperature in the cabinet, resulting in an increase in power consumption. It was.

  The present invention solves the above-described conventional problems. When the door opening / closing detection means continues for a predetermined time or longer, the light emitting element of the lighting device is turned on and off so that the user can look inside the warehouse. An object of the present invention is to provide a refrigerator that urges a user to visually keep the door open even with a lighting device and prevents an increase in power consumption of the refrigerator.

  Moreover, in the said conventional structure, when another door is opened with a time lag from the door opened first with the refrigerator with a right and left door, lighting and extinction of an illuminating device will be repeated. In particular, when the light source of the lighting device is a light emitting diode, there is directivity, and when the first door is opened and then another door is opened, the light rebounds on the stored items in the refrigerator, and the user feels glare. Moreover, when the irradiation direction of the light emitting diode is directed to the user side, the user can feel light more easily because light easily enters the eyes. In particular, when the refrigerator door is opened with the lights in the room turned off, such as at night, if the light-emitting diodes of the lighting device are continuously lit, it is easy to fall into a situation where the contents in the refrigerator are difficult to see. Accordingly, the stored item desired by the user cannot be accurately taken out, the storage position is not determined, and the refrigerator door remains open more than necessary. If such a state persists, despite the use of energy-saving light-emitting diodes as lighting, heat penetration from the outside into the refrigerator increases due to the glare of the lighting device, leading to a reduction in cooling efficiency and power consumption. It had the problem of increasing.

  The present invention solves the above-described conventional problems, and in a refrigerator in which a light-emitting element of a lighting device is turned on and off by door opening / closing detection means, the door open / close detection means detects the open state of the first door of the left and right doors. If the lighting device is not turned on continuously, it is gradually turned off and then turned on gradually. When the door open / close detection means 2 detects the open state of the left and right doors, it opens first. By combining with the lighting cycle of the lighting device of the door, the burden on the user's vision is reduced, and the open state of the door due to glare and light reflection is reduced more than necessary, and the power consumption of the entire refrigerator It aims at providing the refrigerator which prevents the increase in quantity.

  Further, in the conventional configuration and operation, the number of timers in the microcomputer is required as many as the number of storage rooms, and thus there is a problem that resource restrictions are imposed on the microcomputer and the cost is increased.

  In view of the problems described above, a second object of the present invention is to provide a refrigerator that can reduce the number of timers to be used and reduce costs by sharing a timer for light emitting element illumination.

  In order to solve the above-described conventional problems, a refrigerator according to the present invention includes a storage room having a door, door opening / closing detection means for detecting opening / closing of the door, and lighting and extinguishing are controlled by the door opening / closing detection means. In a refrigerator provided with a lighting device for lighting in a storage room, the door opening / closing detection means detects the open state of the door, and when the door is opened for a predetermined time or longer, the lighting device is periodically turned on and off. Further, in the drive control, dimming control in which the lighting time ratio of the lighting device is gradually reduced and dimmed, and brightening in which the lighting time ratio is gradually increased and brightened. A control device that repeats control is provided.

  As a result, even when the user is looking inside the cabinet, it is possible to urge the user to visually keep the door open with the lighting device and to prevent an increase in power consumption of the refrigerator. Become.

  In order to solve the above-described conventional problems, the refrigerator of the present invention further includes a plurality of doors, and the door detection means includes first door opening / closing detection means for detecting opening / closing of one door, and the other. A second door opening / closing detecting means for detecting opening / closing of the first door, and the lighting device is controlled by the first door opening / closing detecting means to be turned on and off, and the second door opening / closing detecting means. A second lighting device that is controlled to be turned on and off by the first lighting device, and the control device detects an open state of the one door by the first door opening / closing detection means, and turns on and off the first lighting device. And the dimming control for gradually decreasing the lighting time ratio of the first lighting device in the driving control, and the lighting time ratio of the first lighting device gradually. With brightening control to increase When the open state of the other door is detected by the second door opening / closing detection means, the drive control for the second illumination device is synchronized with the light reduction control and the light increase control for the first illumination device. It may be what performs.

  This reduces the burden on the user's vision by turning off the lighting device gradually, turning it off and turning it on and off, and repeating the same cycle for other doors. It is possible to prevent the door open state due to glare or light reflection from becoming unnecessarily long and to prevent an increase in power consumption of the entire refrigerator.

  In order to solve the above-described conventional problems, the refrigerator of the present invention also detects a plurality of storage chambers whose front surfaces are open, a plurality of doors provided corresponding to the respective storage chambers, and the opening and closing of the doors. In a refrigerator comprising a plurality of door opening and closing detection means, and lighting devices that respectively illuminate the storage chambers that are controlled to be turned on and off by the respective door opening and closing detection means,

  A dimming control that periodically turns on and off the first lighting device, which is one of the lighting devices, and gradually reduces the lighting time ratio of the first lighting device to reduce light; and gradually Based on the timer, the driving control is repeated based on the timer to increase the lighting time ratio and increase the brightness, and the second lighting device, which is one of the lighting devices, is periodically turned on and off, Based on the timer, drive control for repeating dimming control for gradually decreasing the lighting time ratio of the first lighting device and dimming control for gradually increasing the lighting time ratio to increase light intensity is performed based on the timer. A controller may be provided.

  According to the present invention, it is possible to provide a refrigerator capable of reducing the number of timers used and reducing the cost.

  The refrigerator of the present invention prevents the increase in power consumption of the refrigerator by urging the user to visually keep the door open even when the user is looking inside the refrigerator with the lighting device. Can do.

  In the refrigerator of the present invention, the lighting device is gradually turned off from lighting without turning on the lighting device at the door that is opened on either the left or right side of the refrigerator compartment with the left and right doors. In addition to reducing the burden on the user's vision, it is possible to prevent an increase in the power consumption of the entire refrigerator.

  Moreover, in this invention, there exists an effect that the number of timers to be used can be reduced by sharing the timer for lighting devices.

FIG. 1 is a cross-sectional view of the refrigerator in the embodiment of the present invention. FIG. 2 is a longitudinal sectional view of a main part of the illumination device according to the embodiment. FIG. 3 is a block diagram of the refrigerator according to the embodiment. FIG. 4 is a flowchart of the refrigerator according to the embodiment. FIG. 5 is a timing chart of the refrigerator according to the embodiment. FIG. 6 is a flowchart of the refrigerator in the embodiment of the present invention. FIG. 7 is a timing chart of the refrigerator in the embodiment of the present invention. FIG. 8 is a block diagram of the refrigerator according to the embodiment of the present invention. FIG. 9 is a block diagram of the refrigerator according to the embodiment of the present invention. FIG. 10 is a perspective view of a lighting device of a conventional ice making machine. FIG. 11 is a conceptual diagram in which a conventional lighting device is installed on the top surface of an ice making machine. FIG. 12 is a cross-sectional view of the refrigerator in the embodiment of the present invention. FIG. 13 is a longitudinal sectional view of a main part of the illumination device according to the embodiment. FIG. 14 is a block diagram of the refrigerator according to the embodiment. FIG. 15 is a flowchart of the refrigerator according to the embodiment. FIG. 16 is a timing chart of the refrigerator according to the embodiment. FIG. 17 is a flowchart of the refrigerator in the embodiment of the present invention. FIG. 18 is a timing chart of the refrigerator in the embodiment of the present invention. FIG. 19 is a block diagram of the refrigerator according to the embodiment of the present invention. FIG. 20 is a block diagram of the refrigerator according to the embodiment of the present invention. FIG. 21 is a perspective view of a lighting device for a conventional ice making machine. FIG. 22 is a conceptual diagram in which a conventional lighting device is installed on the top surface of the ice making machine. FIG. 23 is a configuration diagram of the refrigerator in the embodiment of the present invention. FIG. 24 is an explanatory diagram of a lighting device control signal according to the embodiment of the present invention. FIG. 25 is an explanatory diagram of the luminance of the lighting device according to the embodiment of the present invention. FIG. 26 is an explanatory diagram of lighting delay control of the lighting device according to the embodiment of the present invention. FIG. 27 is a configuration diagram of a refrigerator in the conventional technology.

  The refrigerator includes a storage room including a door, an illumination device that illuminates the storage chamber, a door open / close detection unit that detects opening and closing of the door, and a refrigerator that turns on and off the illumination device by the door open / close detection unit, The door open / close detection means detects the open state of the door, and when the door is opened for a predetermined time or longer, the ratio of ON / OFF time of the current flowing to the lighting device is controlled, and the lighting device is repeatedly turned on and off. And a dimming control for turning off the lighting device by gradually decreasing the ON time ratio and a dimming control for turning on the light by gradually increasing the ON time ratio thereafter. .

  Thereby, even when the user is looking at the inside of the cabinet, it is possible to urge the user to visually keep the door open with the lighting device, and to prevent an increase in power consumption of the refrigerator.

  Further, the control device may determine the ratio of the ON / OFF time of the current flowing through the lighting device and the cycle T when the door is opened, and gradually increase the cycle T.

  Thereby, the brightness can be controlled more smoothly with increased brightness, and the door opening notification state can be suppressed.

  In addition, warning sound notification means for notifying the warning sound may be provided, and the warning sound may be emitted by the warning sound notification means when the door is opened for a predetermined time or more.

  Thereby, the door open notification state can be reduced visually and audibly.

  Moreover, the said control apparatus is equipped with the display means which displays in-chamber conditions, such as a chamber temperature and a chamber preset temperature, on the surface of a door at the time of a door opening, You may blink the display part of the said display means.

  Thereby, even if a user looks at the door surface, it can confirm that the door open state is continuing and can prevent the increase in the power consumption of a refrigerator.

  In addition, a plurality of mounting boards mounted with a plurality of light emitting elements as light sources may be arranged, and the light increase control and light reduction control may be controlled independently for each mounting board.

  Thereby, when a plurality of mounting boards are arranged in the cabinet, the lighting control can be individually performed for each mounting board, so that the user can be notified of the door opening notification state with various patterns of lighting and extinguishing.

  Further, a plurality of mounting boards mounted with a plurality of light emitting elements as light sources may be arranged, and the light increase control and the light reduction control may be controlled in synchronization with all the plurality of mounting boards.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same components as those in the conventional example or the embodiment described above are denoted by the same reference numerals, and detailed description thereof may be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to FIGS.
FIG. 1 is a cross-sectional view of the refrigerator according to Embodiment 1 of the present invention.
The illuminating device 20 is an illuminating device using an LED or the like as a light source, and is arranged in the vertical direction on the left wall surface and the right wall surface in the refrigerator compartment 13, respectively.
The door opening / closing detection means 24 is an apparatus configured by an electronic switch such as a mechanical switch or a Hall IC, and detects an open / closed state of the door 25 of the refrigerator compartment of the refrigerator compartment 13.
The control device 26 is installed in the substrate storage unit 28.
The freezer compartment fan 10 circulates the cold air in the freezer compartment 11 and also circulates the cold air to the refrigerator compartment 13 when the damper 12 is open. When the cool room 13 does not require cold air, the damper 12 is closed.
The compressor fan 14 air-cools the compressor 16 and the condenser (not shown) installed in the machine room 15.
The electromagnetic valve 17 controls the flow rate of the refrigerant to the cooler 18. The automatic ice maker 19 twists the ice tray 21 and performs an ice removing operation. The temperature detection means 22 makes the control device 26 detect the temperature of each part of the refrigerator.

FIG. 2 is a longitudinal sectional view of a main part of the illumination device 20 according to the embodiment.
As shown in the figure, the lighting device 20 includes a plurality of light emitting elements as light sources.
The mounting substrate 1 has a flat plate shape, a circuit pattern (not shown) is formed on one surface or both surfaces, and an epoxy resin-based substrate or an insulating metal substrate having good thermal conductivity is used.
As the light emitting element of the light source, the light emitting diode 2 is employed in the present embodiment. The light emitting diode 2 is formed in a bullet shape. The light emitting diode 2 has a structure in which, for example, blue light from a GaN-based blue light emitting diode is used to excite a fluorescent material to obtain white light, and includes two energization terminals 3 that conduct current.
The heat insulating plate 4 is formed in a flat plate shape using a resin such as urethane, and is provided between the mounting substrate 1 and the light emitting diode 2 with a plurality of insertion holes arranged in parallel. Here, the light-emitting diode 2 is mounted with the energization terminal 3 inserted through the insertion hole of the heat insulating plate 4 and soldered to the circuit pattern of the mounting substrate 1, and a plurality of the light-emitting diodes 2 are arranged in parallel on the mounting substrate 1. In addition, when the emitted-heat amount of the light emitting diode 2 is small, you may abolish the heat insulation board 4. FIG.

  Next, the mounting substrate 1 on which a plurality of light emitting diodes are mounted in the vertical direction is held by a spacer 6 integrally formed with an outer frame 9 in a recess 5 provided in a refrigerator side wall 8. The lamp cover 7 is arranged as a lighting device 20 on the left and right wall surfaces in the refrigerator cabinet so as to cover the entire light emitting part of the light emitting diode 2 at a certain distance from the light emitting part.

  FIG. 3 is a block diagram of the refrigerator in the first embodiment of the present invention.

In FIG. 3, the microcomputer 30 in the control device 26 acquires the temperature of each part of the refrigerator from the temperature detection means 22 and issues a drive command to the freezer fan 10, the compressor fan 14, the electromagnetic valve 17, and the automatic ice maker 19.
Since the solenoid valve 17 and the automatic ice maker 19 use a large amount of current, they are programmed in the microcomputer 30 so as not to be driven simultaneously.
In addition, the control device 26 detects the open / closed state of the door 25 by the door open / close detection means 24, and drives the lighting device 20 by the lighting device drive circuit 31 in the open state.
The freezer compartment fan 10 is driven by a freezer compartment fan drive circuit 32. The freezer compartment fan 10 can be operated at a variable speed by the freezer compartment fan drive circuit 32, and when the microcomputer 30 determines that the freezer compartment fan 10 needs to be rotated based on the temperature signal of the temperature detecting means 22, the state is shown. Thus, high speed rotation and low speed rotation can be switched.
The compressor fan 14 is driven by a compressor fan drive circuit 33.
The solenoid valve 17 is driven by a solenoid valve drive circuit 34.
The automatic ice maker 19 is driven by an automatic ice maker drive circuit 35. The timer counter 36 is built in the microcomputer 30 and integrates the elapsed time since the door 25 is closed.

  FIG. 4 is a flowchart regarding the open / close state of the door 25 of the refrigerator and the drive control of the lighting device 20 according to Embodiment 1 of the present invention.

  FIG. 5 is a timing chart showing the operation of each stage (1, 2, 3) with the horizontal axis as the time unit for the operation of turning on and off the light emitting diode 2 of the lighting device 20.

  In step 1, if the signal from the door opening / closing detection means 24 is the door closed, the timer count of the timer counter 36 is cleared, and the process returns to step 1. If the signal from the door opening / closing detection means 24 is the door open, the process proceeds to step 2.

  In step 2, the timer counter 36 starts counting and the argument A is set to an initial value of 1.

  In step 3, if the count value of the timer counter 36 is equal to or greater than T1, that is, if the door opening time is equal to or greater than T1, the process proceeds to step 5 and it is determined that the door open state continues for a long time. Switch to lighting control that is left open.

  If the count value of the timer counter 36 in step 3 is equal to or less than T1, the process proceeds to step 4.

  In step 4, the light emitting diode 2 is kept on.

  By performing the operations in steps 3 and 4 as described above, as shown in the stage 1 in FIG. 5, when the door opening / closing detection means 24 detects that the refrigerator compartment door 25 is opened (door open), the door is opened from T1. During the time, the light-emitting diode 2 of the lighting device 20 is kept on.

  Step 5 represents that the light-emitting diode 2 of the lighting device 20 is turned on after the time T1 has elapsed.

  In step 6, the timer counter 36 compares with T2 × A (initial value is 1). If the count value is T2 × A or less, the process proceeds to step 4. If the count value is T2 × A or more, the process proceeds to step 7. Transition.

  Step 7 turns off the light emitting diode 2 of the lighting device 20.

  In step 8, the timer counter 36 compares with T3, and if the count value is equal to or less than T3, the process proceeds to step 7. If the count value is equal to or greater than T3, the process proceeds to step 9.

  By performing the operations of Steps 5, 6, 7, and 8, the operation of the first T3 period is performed as shown in the stage 2 of FIG. After the time A has elapsed, the light is extinguished until the T3 period.

  Step 9 sets the argument A to a value obtained by subtracting the P value from the argument A.

  In step 10, if the count value of T2 × (A−P) is 0 or less, the timer counter 36 is cleared and the process proceeds to step 11. If T2 × (A−P) is greater than 0, the light emitting diode is turned on. The process proceeds to step 5 with the above set.

  By performing the operations of Steps 9 and 10, as shown in the stage 2 of FIG. 5, the light emitting diode 2 of the lighting device 20 in the T2 × (A−P) period is turned on, which is the operation of the second period T3. Become.

  Thereafter, the light is turned off until the T3 period. The P value is subtracted from the argument A, and the operation of turning off the light is repeated while gradually shortening the lighting time until T2 × A becomes 0 or less. When T2 × A becomes 0 or less, the stage 3 is entered.

  Step 11 represents that the count value is cleared after step 10 and the light-emitting diode 2 of the lighting device 20 gradually shifts to a lighting display.

  In step 12, the timer counter 36 compares with T2 × A (initial value is 1). If the count value is T2 × A or less, the process proceeds to step 12. If the count value is T2 × A or more, the process proceeds to step 13. Transition.

  Step 13 turns off the light emitting diode 2 of the lighting device 20.

  In step 14, the timer counter 36 compares with T3. If the count value is T3 or less, the process proceeds to step 14. If the count value is T3 or more, the process proceeds to step 15.

  By performing the operations of steps 11, 12, 13, 14, and 15, the operation of the first T3 period is performed as shown in stage 2 of FIG. 5, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A period. After the time T2 × A has elapsed, the light is turned off until the period T3.

  Step 15 sets the argument A to a value obtained by adding the P value to the argument A.

  In step 16, if the count value of T2 × (A + P) is equal to or greater than T3, the timer counter 36 is cleared and the process proceeds to step 1. If T2 × (A + P) is equal to or less than T3, the light-emitting diode remains turned on. Migrate to

  By performing the operations of Steps 15 and 16, the light emitting diode 2 of the lighting device 20 in the T2 × (A + P) period, which is the operation of the second period T3 period, is turned on as shown in the stage 2 of FIG. The light emitting diode 2 of the illuminating device 20 gradually increases the lighting time and is turned on until T2 × (A + P) and then turned off until T3. Then stage 4 is repeated.

  After the control device 26 controls the lighting device 20 based on the flow as described above, the user opens the refrigerator compartment door 25 and the door open / close detection means 24 detects the door opening, and then the following state It becomes. That is, as in stage 1 in FIG. 5, the refrigerator compartment door 25 is kept lit for T1 time even if it is opened.

  Next, after the time T1 has elapsed from the detection of the opening of the door, the operation proceeds to the stage 2, and the lighting times for the predetermined time T3 are set to T2 × A (first), T2 × (AP) (second), T2 ×. (APP) (third),... T2 × (AP-...) (Nth) is used to drive and control the lighting device 20 to blink. Specifically, the ON time, which is the time during which the lighting device 20 is lit, is shortened by gradually shortening the time during which the current flows to the light emitting diode.

  Further, as in stage 3, the lighting times for the predetermined time T3 are T2 × A (first), T2 × (A + P) (second), T2 × (A + P + P) (third),... The blinking of the lighting device 20 is controlled in the manner of × (A + P +...) (Nth). Specifically, the ON time during which the lighting device 20 is turned on is lengthened by gradually lengthening the time during which the current flows to the light emitting diode. Then, stage 2 and stage 3 are repeated.

  As in this embodiment, when the door is opened, it remains lit for T1 time, and after gradually darkening, it gradually brightens. Therefore, it is gentle to the user and is hard to see in the refrigerator compartment 13. The burden on the user's vision due to the lighting device can be further reduced, and further the increase in power consumption of the entire refrigerator can be prevented.

  That is, when the refrigerator door 25 is opened and the light-emitting diode 2 is immediately maintained in the brightened state, the light-emitting diode 2 is particularly directional, so that the contents are reflected by reflection or directly. When the light is received, it is possible to solve the problem that it is easy for the user to see the light and the inside of the refrigerator compartment 13 is difficult to see.

  And when the door is opened for a predetermined time or more, even if the user is looking inside the warehouse, the brightness in the warehouse periodically sings back, so that the door is visually open to the user Can be urged by the lighting device to prevent an increase in power consumption of the refrigerator.

(Embodiment 2)
The control device 26 provided in the refrigerator shown in the first embodiment repeats the dimming control while gradually reducing the lighting time in the same period T, and thereafter performing the dimming control while gradually increasing the lighting time.

  In the second embodiment, the transition from the bright state to the dimming state can be performed more smoothly by advancing the period T.

  FIG. 6 is a flowchart regarding the open / closed state of the door 25 of the refrigerator and the drive control of the lighting device 20 according to Embodiment 2 of the present invention.

  FIG. 7 is a timing chart showing the operation of each stage (101, 102, 103) with the horizontal axis representing the time of turning on and off the light emitting diode 2 of the lighting device 20.

  In step 101, if the signal from the door opening / closing detection means 24 is closed, the timer count of the timer counter 36 is cleared and the process returns to step 101. If the signal from the door opening / closing detection means 24 is door opening, step 102 is executed. Migrate to

  In step 102, the timer counter 36 starts counting, and the argument A is set to the initial value 1 and the coefficient R is set to the initial value 0.9.

  In step 103, if the count value of the timer counter 36 is equal to or greater than T1, the process proceeds to step 5. If the count value of the timer counter 36 in step 3 is equal to or less than T1, the process proceeds to step 104.

  In step 104, the light emitting diode 2 is kept on. When the door opening / closing detection means 24 detects that the refrigerator compartment door 25 is opened as shown in the stage 1 of FIG. 5 by performing the operations in steps 3 and 4 as described above, the lighting device 20 is for T1 time from the door opening. The light emitting diode 2 is kept on.

  Step 105 represents that the light emitting diode 2 of the lighting device 20 has been turned on after the time T1 has elapsed.

  In step 106, the timer counter 36 compares with T2 × A × R (the initial value of A is 1, R is 0.9). If the count value is equal to or smaller than T2 × A × R, the process proceeds to step 104. If the value is equal to or greater than T2 × A × R, the process proceeds to step 107.

  In step 107, the light emitting diode 2 of the lighting device 20 is turned off.

  In step 108, the timer counter 36 compares with T3, and if the count value is T3 or less, the process proceeds to step 107. If the count value is T3 or more, the process proceeds to step 109.

  By performing the operations of Steps 105, 106, 107, and 108, the operation of the first T3 period is performed as shown in the stage 102 of FIG. 7, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A × R period. After the time T2 × A × R has elapsed, the light is turned off until the period T3.

  Step 109 sets the argument A to a value obtained by subtracting the P value from the argument A.

  In step 110, if the count value of T2 × (AP) × R is 0 or less, the timer counter 36 is cleared and the process proceeds to step 1. If T2 × (AP) × R is greater than 0, The process proceeds to step 105 with the light emitting diode turned on.

  By performing the operations of Steps 109 and 110, as shown in the stage 102 of FIG. 7, the light-emitting diode 2 of the illumination device 20 in the T2 × (A−P) × R period illumination device 20 that operates in the second period T3 period is Lights up.

  Thereafter, the light is turned off until the T3 period. The P value is subtracted from the argument A and the coefficient R is multiplied, and the operation of turning off the light is repeated while gradually shortening the lighting time until T2 × (AP) × R becomes 0 or less, and T2 × A is 0 or less. Then, the stage 103 is entered.

  Step 11 represents that the count value is cleared after step 110 and the light emitting diode 2 of the lighting device 20 gradually shifts to the lighting display.

  In step 112, the timer counter 36 compares T2 × A (A is an initial value of 1 and R is 0.9). If the count value is T2 × A or less, the process proceeds to step 112. The count value is T2 × If it is greater than or equal to A, the process proceeds to step 113.

  In step 113, the light emitting diode 2 of the lighting device 20 is turned off.

  In step 114, the timer counter 36 compares with T3, and if the count value is T3 or less, the process proceeds to step 130. If the count value is T3 or more, the process proceeds to step 131.

  By performing the operations of Steps 11, 112, 113, 114, and 115, the operation of the first T3 period is performed as shown in the stage 102 of FIG. 5, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A period. After the time T2 × A × R has elapsed, the light is turned off until the period T3.

  In step 115, the argument A is a value obtained by adding the P value to the argument A.

  In step 116, if the count value of T2 × (A + P) × R is equal to or smaller than T3, the timer counter 36 is cleared and the process proceeds to step 101. If T2 × (A + P) × R is equal to or larger than T3, the light emitting diode is turned on. The process proceeds to step 11 as it is.

  By performing the operations of steps 115 and 116, as shown in the stage 102 of FIG. 7, the light emitting diode 2 of the illumination device 20 in the T2 × (A + P) × R period is turned on, which is the operation of the second period T3. Become. The light emitting diode 2 of the illuminating device 20 gradually increases the lighting time and is turned on until T2 × (A + P) × R and then turned off until T3. Thereafter, the stage 104 is repeated.

  Therefore, when the user opens the door 25 of the refrigerator compartment and the door opening / closing detection means 24 detects the door opening, the following state is obtained. That is, as in the stage 101 of FIG. 7, the light emitting diode 2 is kept on for T1 time.

  Next, after the time T1 elapses, the operation proceeds to the operation of the stage 102, and the lighting time for the predetermined time T3 is set to T2 × A × R (first), T2 × (AP) × R (second), The time for passing a current through the light-emitting diode, such as T2 × (A-P-P) × R (third),... T2 × (A-P-...) × R (Nth) It is gradually reduced to shorten the ON time for lighting, and the lighting time for the predetermined time T3 is T2 × A × R (first), T2 × (A + P) × R (second) as in the stage 3. ), T2 × (A + P + P) × R (third),... T2 × (A + P +...) × R (Nth) Thus, the ON time for lighting is lengthened, and the stages 102 and 103 are repeated.

  Therefore, when the user opens the refrigerator compartment door 25, the user sees the light emitting diode 2 blinking from the dimmed state to the brightened state more smoothly and gradually. On the other hand, it is possible to reduce unsightly in the room, and it is possible to reduce the power consumption of the entire refrigerator.

  Further, as described above, the light increase control is performed with the number of repetitions being fixed to a certain number, but the number of repetitions of the same lighting time for T3 may be gradually reduced.

  Thereby, the brightness of the light emitting diode 2 during the transition period from the dimming state to the brightening state can be controlled smoothly.

  The refrigerator of the present invention also includes a control device that controls the current flowing through the light emitting diode 2 by the door opening / closing detection means 24, and when the door opening / closing detection means detects the open state of the door 25, the control device 26 is a light emitting diode. After the current flowing in 2 is turned OFF for a predetermined time, the ON / OFF time ratio of the current is controlled such that the ON time is gradually reduced and the period T is gradually advanced.

  As a result, since the lighting device 20 is gradually brightened and turned on when the lamp is turned on, it is possible to improve the quality of lighting and to reduce power consumption when the door 25 is opened. In addition, it is possible to extend the life of the light emitting diode by suppressing the ON time of the light emitting diode.

  The refrigerator of the present invention also includes a control device that controls the current that flows through the light emitting diode 2 by the door opening / closing detection means 24. When the door opening / closing detection means detects the open state of the door 25, the control device 26 detects the light emitting diode 2. After the current to be supplied to the current is turned off for a predetermined time, the same ON / OFF time of the current is repeated, and thereafter, the ON time is gradually lengthened and repeatedly controlled.

  As a result, the light emitting diode 2 of the lighting device 20 is smoothly brightened when lit, so that the quality of the high-quality lighting can be further improved.

  Further, in the first embodiment, the control is shown in which the light emitting diode 2 is dimmed and gradually dimmed after a predetermined time T1 as in step 3, and then gradually dimmed from the dimmed state. However, the predetermined time has not elapsed. In other words, the process may proceed to step 5 when T1 = 0, and control may be performed in the same manner as in the first embodiment.

  As a result, the light is gradually dimmed and then gradually dimmed from the dimmed state, reducing the burden on the user's vision and making the door open due to glare and light reflections longer than necessary. The increase in power consumption of the entire refrigerator can be prevented.

  Similarly, in the second embodiment, the light emitting diode 2 is turned on after the predetermined time T1 has elapsed in step 103. However, even if the predetermined time has not elapsed, that is, the process proceeds to step 105 when T1 = 0, and the second embodiment is described below. You may control similarly to.

  This makes it possible to reduce the burden on the user's vision by gradually and gradually increasing the brightness without turning on the lighting device at a stretch, and the door open state due to glare and light reflection will be longer than necessary. It can reduce and the increase in the power consumption of the whole refrigerator can be prevented.

(Embodiment 3)
FIG. 8 is a block diagram regarding the open / close state of the door 25 of the refrigerator and the drive control of the lighting device 20 according to Embodiment 3 of the present invention.

  In the first embodiment, the dimming control is performed while gradually decreasing the lighting time with respect to the period T, and then the dimming control is performed while gradually increasing the lighting time. However, the warning sound is generated by the buzzer 38 from the warning sound generating means 37. Are generated synchronously.

  For example, when the dimming control is performed, the warning sound by the buzzer 38 is gradually reduced, and when the dimming control is performed, the warning sound by the buzzer 38 is gradually increased or the opposite synchronization state.

  As a result, the alarm sound is synchronized with the control that gradually turns off and then gradually turns on brightly, reducing the burden on the user's vision and requiring the door to be open due to glare and light reflection. It is possible to prevent the user from leaving the door open by the warning sound by reducing the longer time and further promoting the user's warning consciousness by combining the visual and auditory cycles. An increase in the amount of electric power can be prevented.

(Embodiment 4)
FIG. 9 is a block diagram regarding the open / close state of the door 25 of the refrigerator and the drive control of the lighting device 20 according to Embodiment 4 of the present invention.

  The first embodiment repeats the dimming control while gradually decreasing the lighting time with respect to T, and thereafter performing the dimming control while gradually increasing the lighting time. In the display substrate 40 displaying the temperature display from the display means 39 for displaying the set temperature, etc., the temperature display of the display substrate is blinked.

  This reduces the burden on the user's vision by synchronizing the flashing of the temperature display on the display board with the control that gradually dims and then gradually dims from the dimmed state. Reduces unnecessarily long door opening due to reflection of light, prevents doors from being left open and bites of food, and prevents an increase in power consumption of the entire refrigerator be able to.

  In addition, as shown in FIG. 1 of the first embodiment, the mounting substrate 1 is formed of one mounting substrate 1 on one side wall of the opening, but a plurality of mounting substrates 1 are arranged on one side wall, A plurality of light emitting diodes 2 may be mounted on the mounting substrate 1. In this case, the above-described light increase control and light attenuation control are controlled independently for each mounting substrate 1, and the illumination of one mounting substrate 1 is You may control so that it may be in a dimming state, and the illumination of the other mounting board | substrate 1 may become a dimming state. Thereby, even if the door open state is kept open for a long time, it is possible to prevent all the lights in the refrigerator compartment 13 from being turned off and becoming dark and making it difficult to see the stored items in the warehouse.

  In addition, in a refrigerator in which one mounting substrate 1 is disposed on one side wall and one mounting substrate 1 is disposed on the other side wall, lighting control is performed independently, and when one lighting device 20 performs light control, the other lighting device 20 In order to achieve dimming control, the lighting device 20 on the left and right walls is controlled by shifting the dimming control and dimming control to prevent the interior from being completely dimmed, and the door open state is predetermined. Even if it lasts longer than the time, the interior can be brightly controlled simultaneously with the warning to the user.

  Moreover, the refrigerator of another aspect is the 1st door opening / closing detection which detects opening / closing of one door with the storage room provided with a door, the illuminating device which illuminates the said storage room, and the refrigerating room of the said storage room is a double door type door. Means, a second door opening / closing detection means for detecting opening / closing of the other door, a first lighting device for controlling light increase / decrease by the first door opening / closing detection means, and light increase control by the second door opening / closing detection means. In the refrigerator having the second lighting device that performs dimming control, the first door opening / closing detection means detects the open state of the one door, and the ratio of the ON / OFF time of the current that flows to the first lighting device is determined. Under the control, the lighting device repeats the light increase control and the light reduction control, gradually reduces the ON time ratio to reduce the light, and then gradually increases the ON time ratio to increase the light. Then repeat these. Next, when the open state of the other door is detected by the second door opening / closing detection means, the ratio of the ON / OFF time of the current flowing through the second lighting device is synchronized with the ratio of the first lighting device. Therefore, without continually lighting the lighting device, the lighting control is gradually reduced from the lighting, and the control of gradually increasing the brightness from the dimming state is repeated to reduce the burden on the user's vision, and due to glare and light reflection By reducing the door open state from becoming longer than necessary, it is possible to prevent an increase in power consumption of the entire refrigerator.

  Further, the control device may determine the ratio of the ON / OFF time of the current flowing through the lighting device and the period T when the door is opened, and gradually increase the period T. As a result, brightness can be controlled more smoothly with increased brightness, and when another door is opened, the burden on the user's vision can be reduced by combining with the period T, and then a certain period can be accelerated. Therefore, the visibility of the opened state of the door to the user can be improved.

  Moreover, you may provide the warning sound alerting | reporting means which alert | reports a warning sound when a door opens. Thus, by issuing the warning sound by the warning sound notification means, the user can detect the door skiing due to the warning sound being forgotten to close the door opening or biting food, and the power consumption of the entire refrigerator Can be prevented.

  Further, when the door is opened, a display unit for displaying the internal temperature or the internal set temperature on the surface of the door may be provided, and the display unit of the display unit may blink. As a result, the door open state due to glare or light reflection is reduced more than necessary, and the user can detect door skies caused by forgetting to close the door or biting food by blinking the display means. And increase in power consumption of the entire refrigerator can be prevented.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 5)
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 12 is a cross-sectional view of the refrigerator in the fifth embodiment of the present invention.
The illuminating device 20 is an illuminating device using an LED or the like as a light source, and is arranged in the vertical direction on the left wall surface and the right wall surface in the refrigerator compartment 13, respectively.
The door opening / closing detection means 24 is configured by an electronic switch such as a mechanical switch or a Hall IC, and is a device that detects the open / close state of the refrigerator compartment door 25 of the refrigerator compartment 13.
The control device 26 is installed in the substrate storage unit 28.

  FIG. 13 is a longitudinal sectional view of a main part of the illumination device 20 in the same embodiment.

  Next, the mounting substrate 1 on which a plurality of light emitting diodes are mounted in the vertical direction is held by a spacer 6 integrally formed with an outer frame 9 in a recess 5 provided in a refrigerator side wall 8. The lamp cover 7 is arranged as a lighting device 20 on the left and right wall surfaces in the refrigerator cabinet so as to cover the entire light emitting part of the light emitting diode 2 at a certain distance from the light emitting part.

  FIG. 14 is a block diagram of the refrigerator in the first embodiment of the present invention.

  In FIG. 14, the microcomputer 30 in the control device 26 acquires the temperature of each part of the refrigerator from the temperature detecting means 22 and issues a drive command to the freezer fan 10, the compressor fan 14, the electromagnetic valve 17, and the automatic ice maker 19. Since the solenoid valve 17 and the automatic ice maker 19 use a large amount of current, they are programmed in the microcomputer 30 so as not to be driven simultaneously.

  Further, the first door opening / closing detection means 24 detects the open / closed state of the door 25, and in the open state, the lighting device driving circuit 31 drives the lighting device 20. The timer counter 36 is built in the microcomputer 30 and integrates the elapsed time since the door 25 is closed.

  FIG. 15 is a flowchart regarding the open / close state of the door 25 of the refrigerator and the drive control of the lighting device 20 according to the embodiment of the present invention.

  FIG. 16 is a timing chart showing the operation of each stage (1, 2, 3, 4) with the horizontal axis representing the time of turning on and off the light emitting diode 2 of the lighting device 20.

  Step 1 clears the timer count of the timer counter 36 if the signal from the door open / close detection means 24 is closed, and returns to Step 1, and if the signal from the door open / close detection means 24 is door open, Step 2 Migrate to

  In step 2, the timer counter 36 starts counting and the argument A is set to an initial value of 1.

  In step 3, if the count value of the timer counter 36 is equal to or greater than T1, the process proceeds to step 5. If the count value of the timer counter 36 in step 3 is equal to or less than T1, the process proceeds to step 4.

  In step 4, the light emitting diode 2 is kept on. When the door opening / closing detection means 24 detects that the door 25 of the refrigerator compartment is opened as shown in the stage 1 of FIG. 16 by performing the operations of steps 3 and 4 as described above, the lighting device is operated for T1 time from the door opening. The lighting of 20 light emitting diodes 2 is maintained.

  Step 5 represents that the light-emitting diode 2 of the lighting device 20 is turned on after the time T1 has elapsed.

  In step 6, the timer counter 36 compares with T2 × A (initial value is 1). If the count value is T2 × A or less, the process proceeds to step 4. If the count value is T2 × A or more, the process proceeds to step 7. Transition.

  Step 7 turns off the light emitting diode 2 of the lighting device 20.

  In step 8, the timer counter 36 compares with T3, and if the count value is equal to or less than T3, the process proceeds to step 7. If the count value is equal to or greater than T3, the process proceeds to step 9.

  By performing the operations of Steps 5, 6, 7, and 8, the operation of the first T3 period is performed as shown in stage 2 of FIG. 16, and during the T2 × A period, the light emitting diode 2 of the lighting device 20 is turned on, and T2 After the time A has elapsed, the light is extinguished until the T3 period.

  Step 9 sets the argument A to a value obtained by subtracting the P value from the argument A.

  In step 10, if the count value of T2 × (A−P) is 0 or less, the timer counter 36 is cleared and the process proceeds to step 11. If T2 × (A−P) is greater than 0, the light emitting diode is turned on. The process proceeds to step 5 with the above set.

  By performing the operations of Steps 9 and 10, as shown in stage 2 of FIG. 16, the light emitting diode 2 of the lighting device 20 in the T2 × (A−P) period is turned on. Become.

  Thereafter, the light is turned off until the T3 period. The P value is subtracted from the argument A, and the operation of turning off the light is repeated while gradually shortening the lighting time until T2 × A becomes 0 or less. When T2 × A becomes 0 or less, the stage 3 is entered.

  Step 11 represents that the count value is cleared after Step 10 and light is gradually increased by the light emitting diode 2 of the lighting device 20.

  In step 12, the timer counter 36 compares with T2 × A (initial value is 1). If the count value is T2 × A or less, the process proceeds to step 12. If the count value is T2 × A or more, the process proceeds to step 13. Transition.

  Step 13 turns off the light emitting diode 2 of the lighting device 20.

  In step 14, the timer counter 36 compares with T3. If the count value is T3 or less, the process proceeds to step 14. If the count value is T3 or more, the process proceeds to step 15.

  By performing the operations of steps 11, 12, 13, 14, and 15, the operation of the first T3 period is performed as shown in stage 2 of FIG. 16, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A period. After the time T2 × A has elapsed, the light is turned off until the period T3.

  Step 15 sets the argument A to a value obtained by adding the P value to the argument A.

  In step 16, if the count value of T2 × (A + P) is equal to or less than T3, the timer counter 36 is cleared and the process proceeds to step 1. If T2 × (A + P) is equal to or greater than T3, the light emitting diode remains turned on. Migrate to

  By performing the operations of steps 15 and 16, the light emitting diode 2 of the lighting device 20 in the T2 × (A + P) period, which is the operation of the second period T3 period, is turned on as shown in the stage 2 of FIG. The light emitting diode 2 of the illuminating device 20 gradually increases the lighting time and is turned on until T2 × (A + P) and then turned off until T3.

  Step 17 clears the timer counter of the timer counter 36 if the signal from the door opening / closing detection means 24 is closed, and returns to Step 1, and if the signal from the second door opening / closing detection means 41 is door opening, Control goes to step 18.

  Step 18 starts the count of the timer counter 36 and sets the argument A to an initial value of 1.

  In step 19, if the count value of the timer counter 36 is equal to or greater than T1, the process proceeds to step 21. If the count value of the timer counter 36 in step 3 is equal to or less than T1, the process proceeds to step 4.

  In step 20, the light emitting diode 2 is kept lit. When the door opening / closing detection means 24 detects that the refrigerator compartment door 25 is opened as shown in the stage 1 of FIG. 16 by performing the operations of Steps 19 and 20 as described above, the lighting device 20 is for T1 time from the door opening. The light emitting diode 2 is kept on.

  Step 21 represents that the light-emitting diode 2 of the lighting device 20 is turned on after the time T1 has elapsed.

  In step 22, the timer counter 36 compares with T2 × A (initial value is 1). If the count value is T2 × A or less, the process proceeds to step 20. If the count value is T2 × A or more, the process proceeds to step 23. Transition.

  In step 23, the light emitting diode 2 of the lighting device 20 is turned off.

  In step 24, the timer counter 36 compares with T3. If the count value is equal to or less than T3, the process proceeds to step 23. If the count value is equal to or greater than T3, the process proceeds to step 25.

  By performing the operations of steps 21, 22, 23, and 24, the operation of the first T3 period is performed as shown in stage 2 of FIG. 16, and during the T2 × A period, the light emitting diode 2 of the lighting device 20 is turned on, and T2 After the time A has elapsed, the light is extinguished until the T3 period.

  In step 25, the argument A is a value obtained by subtracting the P value from the argument A.

  In step 26, if the count value of T2 × (AP) is 0 or less, the timer counter 36 is cleared and the process proceeds to step 27. If T2 × (AP) is greater than 0, the light emitting diode is turned on. The process proceeds to step 21 while keeping the setting.

  By performing the operations of steps 25 and 26, as shown in stage 2 of FIG. 16, the light-emitting diode 2 of the lighting device 20 in the T2 × (A−P) period is turned on, which is the operation of the second period T3. Become.

  Thereafter, the light is turned off until the T3 period. The P value is subtracted from the argument A, and the operation of turning off the light is repeated while gradually shortening the lighting time until T2 × A becomes 0 or less. When T2 × A becomes 0 or less, the stage 3 is entered.

  Step 27 represents that the count value is cleared after step 26 and the light-emitting diode 2 of the lighting device 20 gradually shifts to the lighting display.

  In step 28, the timer counter 36 compares with T2 × A (initial value is 1), and if the count value is T2 × A or less, the process proceeds to step 28. If the count value is T2 × A or more, the process proceeds to step 29. Transition.

  Step 29 turns off the light emitting diode 2 of the lighting device 20.

  In step 30, the timer counter 36 compares with T3, and if the count value is equal to or less than T3, the process proceeds to step 30. If the count value is equal to or greater than T3, the process proceeds to step 31.

  By performing the operations of steps 27, 28, 29, 30, and 31, the operation of the first T3 period is performed as shown in stage 2 of FIG. 16, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A period. After the time T2 × A has elapsed, the light is turned off until the period T3.

  In step 31, the argument A is a value obtained by adding the P value to the argument A.

  In step 32, if the count value of T2 × (A + P) is equal to or smaller than T3, the timer counter 36 is cleared and the process proceeds to step 1. If T2 × (A + P) is equal to or larger than T3, the light emitting diode is kept lit while step 27 is continued. Migrate to

  By performing the operations of steps 31 and 32, as shown in stage 2 of FIG. 16, the light-emitting diode 2 of the illumination device 20 in the T2 × (A + P) period 20 that is in the operation of the second period T3 is turned on. The light emitting diode 2 of the illuminating device 20 gradually increases the lighting time and is turned on until T2 × (A + P) and then turned off until T3. This state is shown in stage 4.

  After the control device 26 controls the lighting device 20 based on the flow as described above, after the user opens the door 25 on the left side of the refrigerator compartment and the door open / close detection means 24 detects the door opening, It becomes a state. That is, as in stage 1 in FIG. 16, the lighting is maintained even if it is open for T1 time.

  Next, after the time T1 has elapsed since the detection of the door opening, the stage 2 operation is started, and the lighting time for the predetermined time T3 is set to T2 × A (first), T2 × (AP) (second), The blinking of the lighting device 20 is controlled in the manner of T2 × (APPP) (third),... T2 × (AP-...) (Nth). Specifically, the ON time, which is the time during which the lighting device 20 is lit, is shortened by gradually shortening the time during which the current flows to the light emitting diode.

  Further, as in stage 3, the lighting times for the predetermined time T3 are T2 × A (first), T2 × (A + P) (second), T2 × (A + P + P) (third),... The blinking of the lighting device 20 is controlled in the manner of × (A + P +...) (Nth). Specifically, the ON time during which the lighting device 20 is turned on is lengthened by gradually lengthening the time during which the current flows to the light emitting diode. Then, the stages 2 and 3 are repeated, and then the door 25a on the right side of the refrigerator compartment is opened, the first door opening / closing detection means 24 operates to perform the same cycle of the left and right doors, and the stage 4 is operated.

  As in this example, when the door is opened, it continues to be lit for T1 hours, gradually darkens from there, then gradually brightens, and the right door of the refrigerator compartment is opened to match the cycle of the left door of the refrigerator compartment. Therefore, it is easy on the eyes for the user, and it is possible to reduce the difficulty of seeing in the refrigerator compartment 13, to further reduce the burden on the user's vision by the lighting device, and to further increase the power consumption of the entire refrigerator. Can be blocked.

  That is, a problem in the prior art, that is, when the left door 25b of the refrigerator compartment is opened and the light emitting diode 2 is turned on immediately, the light emitting diode 2 is particularly directional, so the stored item receives light by reflection or directly. Therefore, it is possible to solve the problem that the user can easily see light and the inside of the refrigerator compartment 13 is difficult to see.

(Embodiment 6)
In the fifth embodiment, the light increase control is performed while gradually decreasing the lighting time with respect to T, and then the light decrease control is performed while gradually increasing the time. However, the cycle T can be accelerated by adopting this embodiment. Thus, the transition from the bright state to the dimming state can be performed more smoothly.

  FIG. 17 is a flowchart regarding the open / close state of the door 25 of the refrigerator and the drive control of the lighting device 20 according to Embodiment 2 of the present invention.

  FIG. 18 is a timing chart showing the operation of each stage (101, 102, 103) with the horizontal axis as the time unit for the operation of turning on and off the light emitting diode 2 of the lighting device 20.

  In step 101, if the signal from the first door opening / closing detection means 24 is closed, the timer counter of the timer counter 36 is cleared and the process returns to step 101. If the signal from the first door opening / closing detection means 24 is door opening, If so, the process proceeds to step 102.

  In step 102, the timer counter 36 starts counting, and the argument A is set to the initial value 1 and the coefficient R is set to the initial value 0.9.

  In step 103, if the count value of the timer counter 36 is equal to or greater than T1, the process proceeds to step 5. If the count value of the timer counter 36 in step 3 is equal to or less than T1, the process proceeds to step 104.

  In step 104, the light emitting diode 2 is kept on. When the first door opening / closing detection means 24 detects that the refrigeration room right door 25a is opened as shown in the stage 1 of FIG. 16 by performing the operations in steps 3 and 4 as described above, the time T1 from the door opening is The lighting of the light emitting diode 2 of the lighting device 20 is maintained.

  Step 105 represents that the light emitting diode 2 of the lighting device 20 has been turned on after the time T1 has elapsed.

  In step 106, the timer counter 36 compares with T2 × A × R (the initial value of A is 1, R is 0.9). If the count value is equal to or smaller than T2 × A × R, the process proceeds to step 104. If the value is equal to or greater than T2 × A × R, the process proceeds to step 107.

  In step 107, the light emitting diode 2 of the lighting device 20 is turned off.

  In step 108, the timer counter 36 compares with T3, and if the count value is T3 or less, the process proceeds to step 107. If the count value is T3 or more, the process proceeds to step 109.

  By performing the operations of Steps 105, 106, 107, and 108, the operation of the first T3 period is performed as shown in the stage 102 of FIG. 18, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A × R period. After the time T2 × A × R has elapsed, the light is turned off until the period T3.

  Step 109 sets the argument A to a value obtained by subtracting the P value from the argument A.

  In step 110, if the count value of T2 × (AP) × R is 0 or less, the timer counter 36 is cleared and the process proceeds to step 1. If T2 × (AP) × R is greater than 0, The process proceeds to step 105 with the light emitting diode turned on.

  By performing the operations of steps 109 and 110, as shown in stage 2 of FIG. 18, the light-emitting diode 2 of the illumination device 20 in the T2 × (A−P) × R period illumination device 20 that operates in the second period T3 period is Lights up.

  Thereafter, the light is turned off until the T3 period. The P value is subtracted from the argument A and the coefficient R is multiplied, and the operation of turning off the light is repeated while gradually shortening the lighting time until T2 × (AP) × R becomes 0 or less, and T2 × A is 0 or less. Then, the stage 103 is entered.

  Step 11 represents that the count value after step 110 is cleared and the light-emitting diode 2 of the lighting device 20 gradually increases in light.

  In step 112, the timer counter 36 compares T2 × A (A is an initial value of 1 and R is 0.9). If the count value is T2 × A or less, the process proceeds to step 112. The count value is T2 × If it is greater than or equal to A, the process proceeds to step 113.

  In step 113, the light emitting diode 2 of the lighting device 20 is turned off.

  In step 114, the timer counter 36 compares with T3. If the count value is equal to or less than T3, the process proceeds to step 14. If the count value is equal to or greater than T3, the process proceeds to step 15.

  By performing the operations of steps 11, 112, 113, 114, and 115, the operation of the first T3 period is performed as shown in stage 2 of FIG. 16, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A period. After the time T2 × A × R has elapsed, the light is turned off until the period T3.

  In step 115, the argument A is a value obtained by adding the P value to the argument A.

  In step 116, if the count value of T2 × (A + P) × R is equal to or smaller than T3, the timer counter 36 is cleared and the process proceeds to step 101. If T2 × (A + P) × R is equal to or larger than T3, the light emitting diode is turned on. The process proceeds to step 11 as it is.

  By performing the operations of steps 115 and 116, as shown in the stage 102 in FIG. 18, the light emitting diode 2 of the lighting device 20 is turned on in the T2 × (A + P) × R period, which is the operation of the second period T3. It becomes. The light emitting diode 2 of the illuminating device 20 gradually increases the lighting time and is turned on until T2 × (A + P) × R and then turned off until T3. Thereafter, the stage 104 is repeated.

  Therefore, the door 25a on the right side of the refrigerator compartment is opened and the first door open / close detecting means 24 operates, and as shown in the stage 101 in FIG. After that, the operation of the stage 102 is started, and the lighting time with respect to the predetermined time T3 is set to T2 × A × R (first), T2 × (AP) × R (second), T2 × (AP). P) × R (third),... T2 × (AP−...) × R (Nth) As shown in FIG. The lighting ON time is shortened, and the lighting time for the predetermined time T3 is T2 × A × R (first), T2 × (A + P) × R (second), and T2 × (A + P + P) as in stage 3. × R (third),... T2 × (A + P +...) × R (Nth) Gradually always a long time to flow a flow, a longer ON time to be lit, repeat the stage 102 and 103.

  Step 117 clears the timer count of the timer counter 36 if the signal from the second door opening / closing detection means 41 is closed, and returns to Step 117, and if the signal from the second door opening / closing detection means 41 is door opening. If so, the process proceeds to step 118.

  In step 118, the timer counter 36 starts counting, and the argument A is set to the initial value 1 and the coefficient R is set to the initial value 0.9.

  In step 119, if the count value of the timer counter 36 is equal to or greater than T1, the process proceeds to step 5. If the count value of the timer counter 36 in step 3 is equal to or less than T1, the process proceeds to step 120.

  In step 120, the light emitting diode 2 is kept on. When the second door opening / closing detection means 41 detects that the refrigerator door left door 25 is opened as shown in the stage 101 of FIG. 18 by performing the operations of steps 103 and 104 as described above, the time T1 from the door opening is The lighting of the light emitting diode 2 of the lighting device 20 is maintained.

  Step 121 represents that the light-emitting diode 2 of the lighting device 20 is turned on after the time T1 has elapsed.

  In step 122, the timer counter 36 compares with T2 × A × R (the initial value of A is 1, R is 0.9). If the count value is equal to or smaller than T2 × A × R, the process proceeds to step 104. If the value is equal to or greater than T2 × A × R, the process proceeds to step 123.

  In step 123, the light emitting diode 2 of the lighting device 20 is turned off.

  In step 124, the timer counter 36 compares with T3. If the count value is equal to or less than T3, the process proceeds to step 123. If the count value is equal to or greater than T3, the process proceeds to step 125.

  By performing the operations of steps 121, 122, 123, and 124, the operation of the first T3 period is performed as shown in the stage 102 of FIG. 18, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A × R period. After the time T2 × A × R has elapsed, the light is turned off until the period T3.

  In step 125, the argument A is a value obtained by subtracting the P value from the argument A.

  In step 127, if the count value of T2 × (AP) × R is 0 or less, the timer counter 36 is cleared and the process proceeds to step 1. If T2 × (AP) × R is greater than 0, The process proceeds to step 121 with the light emitting diode turned on.

  By performing the operations of steps 125 and 126, as shown in the stage 102 of FIG. 18, the light-emitting diode 2 of the lighting device 20 is in the T2 × (A−P) × R period, which becomes the operation of the second period T3. Lights up.

  Thereafter, the light is turned off until the T3 period. The P value is subtracted from the argument A and the coefficient R is multiplied, and the operation of turning off the light is repeated while gradually shortening the lighting time until T2 × (AP) × R becomes 0 or less, and T2 × A is 0 or less. Then, the stage 103 is entered.

  Step 127 represents that the count value after step 126 is cleared and the light-emitting diode 2 of the lighting device 20 gradually shifts to lighting display.

  In step 128, the timer counter 36 compares T2 × A (A is an initial value of 1 and R is 0.9). If the count value is equal to or less than T2 × A, the process proceeds to step 128. The count value is T2 × If it is greater than or equal to A, the process proceeds to step 129.

  Step 129 turns off the light emitting diode 2 of the lighting device 20.

  In step 130, the timer counter 36 compares with T3. If the count value is equal to or less than T3, the process proceeds to step 120. If the count value is equal to or greater than T3, the process proceeds to step 131.

  By performing the operations of steps 127, 128, 129, 130, and 131, the operation of the first T3 period is performed as shown in the stage 103 of FIG. 18, and the light emitting diode 2 of the lighting device 20 is turned on during the T2 × A period. After the time T2 × A × R has elapsed, the light is turned off until the period T3.

  In step 132, the argument A is a value obtained by adding the P value to the argument A.

  In step 132, if the count value of T2 × (A + P) × R is equal to or smaller than T3, the timer counter 36 is cleared and the process proceeds to step 117. If T2 × (A + P) × R is equal to or larger than T3, the light emitting diode is turned on. The process proceeds to step 127 as it is.

  By performing the operations of steps 131 and 132, the light emitting diode 2 of the lighting device 20 in the T2 × (A + P) × R period is turned on, as shown in the stage 102 of FIG. Become. The light emitting diode 2 of the illuminating device 20 gradually increases the lighting time and is turned on until T2 × (A + P) × R and then turned off until T3. Thereafter, the stage 104 is repeated.

  Accordingly, the refrigerator door right door 25a is opened and the first door opening / closing detection means 24 operates, and the lamp is kept lit even during the T1 time period as in the stage 101 of FIG. After the time T1 has elapsed, the stage 102 is moved to the operation of the stage 102, and the lighting times for the predetermined time T3 are T2 × A × R (first), T2 × (AP) × R (second), T2 × ( (AP-P) × R (third),... T2 × (AP -...) × R (Nth) Shorten the ON time to light up. Further, as in stage 3, the lighting times for the predetermined time T3 are T2 × A × R (first), T2 × (A + P) × R (second), T2 × (A + P + P) × R (third). ),... T2 × (A + P +...) × R (Nth) As shown in FIG. Then, these stages 102 and 103 are repeated. Thereafter, the door 25b on the left side of the refrigerator compartment is opened and the second door opening / closing detection means 41 operates to perform the same cycle of the left and right doors, and the stage 104 is operated.

  Accordingly, when the user opens the refrigerator compartment left door 25b, the light emitting diode 2 is lit so as to shift from the dimming state to the brightening state more smoothly. It is possible to reduce the difficulty in viewing the room with respect to the light, and the power consumption can be reduced as a whole refrigerator.

  Further, as described above, the light increase control is performed with the number of repetitions being fixed to a certain number, but the number of repetitions of the same lighting time for T3 may be gradually reduced.

  Thereby, the brightness of the light emitting diode 2 during the transition period from the dimming state to the brightening state can be controlled smoothly.

  In addition, the refrigerator of the present invention includes a control device that controls the current flowing through the light emitting diode 2 by the first door opening / closing detection means 24, and when the second door opening / closing detection means 41 detects the open state of the left door 25b, The control device 26 controls the current flowing in the light emitting diode 2 to be turned ON for a predetermined time, and then gradually decreasing the ON time in the current ON / OFF time ratio and gradually increasing the period T. Moreover, when the open state of the right door 25a is detected by the second door opening / closing detection means 41, the ratio of the ON / OFF time of the left door 25b and the cycle are matched.

  As a result, when the lighting device is turned on, the lighting device 20 is gradually brightened and turned on, and the left and right cycles are adjusted. Therefore, the quality of lighting can be improved and the power consumption when the door 25 is opened can be suppressed. The lifetime of the light emitting diode can be extended.

  The refrigerator of the present invention also includes a control device that controls the current flowing through the light emitting diode 2 by the first door opening / closing detection means 24, and when the second door opening / closing detection means 41 detects the open state of the left door 25b, the control is performed. The device 26 turns off the current flowing through the light emitting diode 2 for a predetermined time, then repeats the same ON / OFF time of the current, and then repeats the ON time gradually and repeatedly, and the first door opening / closing detection means 24 controls the right door. When the open state of 25a is detected, it matches the ON / OFF time of the left door 25b.

  As a result, the light emitting diode 2 of the lighting device 20 is lit in a smooth brightening state at the time of lighting, so that the quality as high-quality lighting can be further improved.

  Further, in the first embodiment, as shown in step 3, after the predetermined time T1 has elapsed, the light emitting diode 2 is turned on and gradually turned off and then gradually turned off, but even if the predetermined time has not elapsed, That is, when T1 = 0, the process proceeds to step 5 and may be controlled in the same manner as in the following embodiments.

  As a result, the lights are gradually turned off and then gradually lighted up from the lights off, thereby reducing the burden on the user's vision and reducing the unnecessarily long door opening due to glare and light reflections. Thus, an increase in power consumption of the entire refrigerator can be prevented.

  Similarly, in the second embodiment, the light emitting diode 2 is turned on after the predetermined time T1 has elapsed in step 103. However, even if the predetermined time has not elapsed, that is, the process proceeds to step 105 when T1 = 0. You may control similarly to.

  As a result, the lighting device is lighted smoothly and gradually without turning on the lighting device at a stretch, reducing the burden on the user's vision and making the door open due to glare and light reflections longer than necessary. The increase in power consumption of the entire refrigerator can be prevented.

(Embodiment 7)
FIG. 19 is a block diagram regarding the open / close state of the door 25 of the refrigerator and the drive control of the lighting device 20 in the present embodiment.

  In the first embodiment, dimming control is performed while gradually decreasing the lighting time with respect to T, and thereafter, dimming control is performed while gradually increasing, but the warning sound is synchronized by the buzzer 38 from the warning sound generating means 37. To generate.

  This reduces the burden on the user's vision by synchronizing the warning sound with the control that gradually dims and then lights up gradually from the dimmed state, and opens the door due to glare and light reflection. By reducing the state from becoming longer than necessary, and combining the visual and auditory cycles, users can be alerted to warnings, and the warning sound can prevent the door from being left open. Increase in power consumption can be prevented.

(Embodiment 8)
FIG. 20 is a block diagram regarding the open / closed state of the refrigerator door 25 and the drive control of the lighting device 20 in the present embodiment.

  In the above embodiment, the dimming control is performed while gradually decreasing the lighting time with respect to T, and then the dimming control is performed while gradually increasing the lighting time. However, the display substrate displaying the temperature display from the display means 39. In 40, the display board temperature display is blinked.

  In this way, the temperature display on the display board blinks and synchronizes with the control that gradually turns off and then turns on brightly from the turn off, thereby reducing the burden on the user's vision and resulting in glare and light reflections. It is possible to prevent the door open state from becoming unnecessarily long, and to prevent further notification while the door is open and to prevent food from being bitten, and to prevent an increase in power consumption of the entire refrigerator.

  The present invention also controls lighting and dimming of the lighting device by a plurality of storage chambers whose front surfaces are open, a lighting device that illuminates the storage chamber, and a plurality of door opening / closing detection means corresponding to the plurality of storage chambers. In the refrigerator provided with the control device, the lighting device is turned on and off while changing the ratio of the ON / OFF time of the current, and at least one timer in the control device for measuring the ON / OFF time includes a plurality of timers. It is a refrigerator characterized by measuring the ON / OFF time of the storage room. As a result, the number of timers can be reduced.

  Further, after detecting that one door is opened by the door opening / closing detection means corresponding to the one door, the door opening / closing detection means corresponding to the other door is opened within a predetermined time. , The lighting device of the other storage chamber corresponding to the other door opened later is synchronized with the light increase control of the lighting device of the one storage chamber corresponding to the first door opened earlier. It may be. Thereby, it has the effect | action that the number of timers can be reduced by synchronizing the light increase control of several illuminating devices.

  Further, after detecting that one door is opened by the door opening / closing detection means corresponding to the one door, the door opening / closing detection corresponding to the other door is detected that the other door is opened after a predetermined time or more. When detecting by means, it is a refrigerator that waits for the end of the brightening control of the lighting device of one storage room corresponding to the one door opened first, and performs the brightening control of the lighting device of the other storage room. Also good. Thereby, it has the effect | action that the number of required timers can be reduced by reusing a timer by controlling so that the brightening control of a several illuminating device may not overlap in time.

  Moreover, after detecting that the door has been opened by the door opening / closing detection means, it may be a refrigerator that starts the light increase control of the lighting device after waiting for a certain period of time. This allows the user to recognize that there is a time lag before opening the door and the lighting device turns on, so that the user will not feel uncomfortable even if the brightening control on the door side that was opened later is awaited Has an effect.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 9)
FIG. 23 is a configuration diagram of an electric system of the refrigerator in the first embodiment of the present invention. In FIG. 23, 110 and 120 are a first storage chamber and a second storage chamber, respectively. 111 and 121 are the doors of the first storage chamber and the second storage chamber, respectively. Reference numerals 112 and 122 denote a door opening / closing detection unit of the first storage chamber and a door opening / closing detection unit of the second storage chamber, respectively, which output an electronic signal corresponding to the opening / closing state of the door of each storage chamber.

  113 and 123 are respectively LED lighting as a first lighting device including a light emitting element that illuminates the first storage chamber, and LED as a second lighting device including a light emitting element that illuminates the second storage chamber. It is lighting. The LED lights 113 and 123 are controlled to be turned on or off by an electronic signal input to the main control microcomputer 130. 130 is a main control microcomputer that controls electric system control of the refrigerator, and outputs operation signals to the compressor, fan, heater, and cooling switching device based on temperature information and time information, and the door open / close detection means 112 and 122. It functions as a control device that receives an electronic signal from the LED lighting 113 and also controls the lighting and extinguishing of the LED lights 113 and 123.

  The LED illuminations 113 and 123 each have a plurality of LEDs mounted on one substrate, and the plurality of substrates may be arranged side by side.

  A timer 131 measures the ON time or OFF time of an electronic signal when the LED lights 113 and 123 are gradually increased or decreased, and is mounted in the main control microcomputer 130. A temperature sensor 180 outputs an electronic signal corresponding to the ambient temperature of the sensor. A plurality of the temperature sensors 180 may be provided for measuring the outside air temperature or for measuring the temperature of an arbitrary place in the refrigerator.

  Reference numeral 140 denotes a compressor control microcomputer that receives an electronic signal from the main control microcomputer 130 and controls the operation of the compressor. 141 is a compressor that receives a signal from the compressor control microcomputer 140 and compresses the refrigerant.

  Reference numeral 150 denotes a fan that performs ON / OFF switching and rotation speed change by an electronic signal from the control microcomputer 130. The fan 150 is for causing the cool air in the refrigerator to flow or applying air to the compressor to promote heat dissipation, and a plurality of fans 150 may be provided. Reference numeral 160 denotes a heater that receives an electronic signal from the main control microcomputer 130 and is provided to prevent freezing and dew condensation in each part of the refrigerator, and a plurality of heaters may be provided.

  170 is a cooling switching device that receives an electronic signal from the main control microcomputer 130 and switches the flow path of the refrigerant in the refrigerator.

  Next, the operation when gradually increasing the LED illumination will be described with reference to FIGS. 23 and 24. Now, when the door 111 of the first storage chamber 110 is opened, the door opening / closing detection means 112 detects that the door has been opened and notifies the main control microcomputer 130 of it.

  At this time, the main control microcomputer 130 starts control for gradually turning on the LED lighting 113. FIG. 24 shows an example of an electronic signal output from the main control microcomputer 130 to the LED illumination 113. When the main control microcomputer 130 is notified by the door opening / closing detection means 112 that the door 111 has been opened, it first outputs a signal for turning on the LED illumination 113 for ON 1 hour. Subsequently, a signal for turning off the LED illumination 113 is output for OFF 1 hour.

  Further, a signal for turning on the LED illumination 113 is output for only ON 2 hours. Here, ON2 time ≧ ON1 time. Further, a signal for turning off the LED illumination 113 is output for OFF 2 hours. Here, it is assumed that OFF2 hours ≦ OFF1 hours. Further, a signal for turning on the LED illumination 113 is output for only ON 3 hours. Here, ON3 time ≧ ON2 hour.

  Subsequently, a signal for turning off the LED illumination 113 is output for an OFF time of 3 hours. Here, it is assumed that OFF 3 hours ≦ OFF 2 hours. In this way, the ON time is increased little by little, and the OFF time is gradually reduced, and finally the LED illumination 113 is gradually increased by always turning on. The same applies to the LED lighting in the second storage room.

  Next, a method for gradually increasing the LED illumination of the two storage rooms while sharing one timer will be described with reference to FIG. First, when the door 25 of one of the storage rooms is opened at the timing Ts of the pattern A, the LED illumination of the storage room is controlled by the ON / OFF pattern of FIG. 24 until the time Te is reached. The amount of light is gradually increased, and after the time Te, the electronic signal is always turned on, and the LED illumination is turned on with the highest luminance.

  During this control, the timer 131 continues to operate continuously from time Ts to time Te in order to measure each ON time and each OFF time in FIG. When the other door 25 is opened at some point in time from time Ts to time Te, the timer 131 performs control (light-intensification control) for gradually increasing the LED illumination on the door 25 side that has been opened first. 24, the ON time or the OFF time somewhere in FIG. 24 is being measured. Therefore, the measurement cannot be started from the ON time due to the LED illumination on the door side that is opened later.

  Therefore, if the time T1 is set between the time Ts and the time Te and the time when the door is opened later is earlier than the time T1, the LED illumination on the door side opened later is synchronized with the LED illumination on the door side opened first. On the other hand, if the time when the door is opened later is later than T1, wait until the LED illumination on the door side that was opened earlier is always on until the light control of the LED illumination on the door side that was opened later is on. As soon as the timer 131 is released from the dimming control of the door-side LED lighting opened first, the dimming control of the door-side LED lighting opened later is executed using the timer 131.

  To explain further with an example, first, when the rear door is opened at a time Tb earlier than the time T1, the LED illumination on the door side that is opened later is a pattern as shown by the solid line of the pattern B in FIG. It synchronizes at the time of Tb with the light increase control of the LED illumination of the door side opened previously shown by A. Then, as shown in the pattern B, the brightness of the LED lighting on the side opened later sharply rises at the time Tb, but the door opened later becomes blind at the time Tb on the construction of the refrigerator, By adjusting the time T1 so that the user cannot see the illumination and the sharp rise amount of the luminance does not become too large, it is possible to prevent the user from feeling uncomfortable lighting up suddenly.

  On the other hand, when the rear door is opened at the time Tc from the time T1 to the time Te as in the pattern C in FIG. 25, the brightness of the LED illumination on the door side immediately opened first is If the brightness of the LED lighting on the side that was opened later is synchronized, the user is given an uncomfortable feeling of suddenly turning on the light. Wait until the door-side LED illumination brightening control that was opened later until Te), which is the time when the door-side LED lighting is opened, and then the door side that was opened later using the timer 131 that was opened. The LED illumination brightening control is started.

  At this time, since the start of the brightening control of the LED illumination on the door side that is opened later is delayed by the time (Te−Tc), there is a possibility that the user may feel uncomfortable that the lighting is delayed. In order to avoid this, in normal LED dimming control, if it is decided to start the dimming control with a waiting time after opening the door, the operation will be the same as in normal times, so the feeling of discomfort that the lighting will be delayed is eliminated. be able to.

  For this purpose, for example, a process as shown in FIG. 26 may be implemented. FIG. 26 is a graph showing an example in which the LED illumination is gradually turned on after a certain period of time after the door is opened. More specifically, after the door is opened at the time Td, after the (Ts−Td) time has elapsed, the light intensity increase control of the LED illumination is started at the time Ts, and is completely lit at the time Te. As a result, even under normal conditions and under the conditions of pattern C in FIG. 25, the door can be opened and the LED illumination can be turned on at a constant interval, and the user does not feel discomfort that the lighting is delayed.

  As described above, the refrigerator according to the present invention can be applied to a household or commercial refrigerator, and in particular, can be applied to a refrigerator provided with illumination using a light emitting diode, an organic EL, or the like as a light source. Furthermore, the present invention can be applied to a wide range of equipment equipped with interior lighting such as an article storage device with a door.

DESCRIPTION OF SYMBOLS 1 Mounting board 2 Light emitting diode 20 Illuminating device 24 Door opening / closing detection means 25 Door 26 Control apparatus 36 Timer counter 10, 20, 110, 120 Storage room 11, 21, 111, 121 Door 12, 22, 112, 122 Door opening / closing detection means 13, 23113, 123 LED illumination 30, 130 Main control microcomputer 31, 32, 131 Timer 40, 140 Compressor control microcomputer 41, 141 Compressor 50, 150 Fan 60, 160 Heater 70, 170 Cooling switching device 80, 180 Temperature sensor

Claims (10)

In a refrigerator comprising a storage room provided with a door, door opening / closing detection means for detecting opening / closing of the door, and an illumination device for lighting in the storage room that is controlled to be turned on and off by the door opening / closing detection means,
When the door open / close detection means detects the open state of the door and the door is opened for a predetermined time or longer, the lighting device is controlled to periodically turn on and off, and the drive control is further performed. And a light reduction control for gradually decreasing the lighting time ratio of the lighting device and a light increasing control for gradually increasing the lighting time ratio to increase the light. refrigerator. 2. The refrigerator according to claim 1, wherein the control device gradually increases a cycle of periodically turning on and off the lighting device. Furthermore, a warning sound notification means for notifying the warning sound is provided,
The refrigerator according to claim 1, wherein the control device controls the warning sound notifying unit so as to emit the warning sound when the door is opened for a predetermined time or longer. Furthermore, it has a display means for displaying the interior state on the surface of the door,
The refrigerator according to claim 1, wherein the control device controls the display unit of the display unit to blink when the door is opened. The lighting device includes a plurality of mounting boards on which light sources are mounted,
The refrigerator according to claim 1, wherein the control device performs the drive control independently for each of the mounting boards. The lighting device includes a plurality of mounting boards on which light sources are mounted,
The refrigerator according to claim 1, wherein the control device controls the dimming by synchronizing a plurality of the mounting boards. The refrigerator includes a plurality of doors,
The door detection means includes first door opening / closing detection means for detecting opening / closing of one door, and second door opening / closing detection means for detecting opening / closing of the other door,
The lighting device includes a first lighting device that is controlled to be turned on and off by the first door opening / closing detection unit, and a second lighting device that is controlled to be turned on and off by the second door opening / closing detection unit,
The controller is
The first door opening / closing detection means detects the open state of the one door, performs drive control to periodically turn on and off the first lighting device, and gradually performs the drive control in the drive control. The light reduction control for decreasing the lighting time ratio of the first lighting device and the light increase control for gradually increasing the lighting time ratio of the first lighting device are repeated,
When the open state of the other door is detected by the second door opening / closing detection means, in the drive control for the second lighting device, control is performed in synchronization with the dimming control and the brightening control for the first lighting device. Item 10. The refrigerator according to Item 1. A plurality of storage chambers whose front surfaces are open, a plurality of doors provided corresponding to the respective storage chambers, a plurality of door opening / closing detection means for detecting opening / closing of the doors, and the door opening / closing detection means In a refrigerator comprising a lighting device that illuminates each of the storage chambers that are controlled to be turned on and off,
A dimming control that periodically turns on and off the first lighting device, which is one of the lighting devices, and gradually reduces the lighting time ratio of the first lighting device to reduce light; and gradually Based on the timer, the driving control is repeated based on the timer to increase the lighting time ratio and increase the brightness, and the second lighting device, which is one of the lighting devices, is periodically turned on and off, Based on the timer, drive control for repeating dimming control for gradually decreasing the lighting time ratio of the first lighting device and dimming control for gradually increasing the lighting time ratio to increase light intensity is performed based on the timer. A refrigerator provided with a control device. Within a predetermined time after the door opening is detected by the first door opening / closing detecting means, which is one of the door opening / closing detecting means, the door opening is opened by the second door opening / closing detecting means, which is one of the door opening / closing detecting means. 9. When detected, the second lighting device controlled based on the second door opening / closing detection means is synchronized with the drive control of the first lighting device controlled based on the first door opening / closing detection means. Refrigerator. When the second door opening / closing detection means detects the opening of the door after a lapse of a predetermined time after the first door opening / closing detection means detects the opening of the door, the control is performed based on the first door opening / closing detection means. The refrigerator according to claim 8, wherein after the light increase control of the first lighting device is finished, the light increase control of the second lighting device controlled based on the second door opening / closing detection unit is performed.

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