JP3096502B2 - Control method of refrigerator with electronic lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial refrigerator having a cooling / freezing means, a heating means and the like for preserving, thawing and aging food, and more particularly to a method for controlling a refrigerator with an electronic lock for opening and closing a door. Things.

[0002]

2. Description of the Related Art A magnetic lock for renting a locker disclosed in Japanese Patent Application Laid-Open No. 53-15199 is known as a conventional refrigerator having a lock, for example, which is not a commercial refrigerator. In this conventional example, locking and unlocking are performed using a magnetic card, and a specific configuration thereof is a door locking device capable of locking and releasing the door in response to a command signal. A lock commanding device that locks the door by giving a locking signal after coin insertion into the door locking device, and a memory that can write a key code of a magnetic card to be used for unlocking at any time as necessary, The key code of the magnetic card inserted for unlocking is compared with the key code recorded in the memory, and only when the two match, the unlock command signal is sent to the door locking device to unlock the door. This is a rental locker magnetic lock having a lock command device.

[0003]

In the prior art, there is a memory in a magnetic card in which a key code can be written at any time, and a device which reads the key code and outputs an unlock command signal in comparison with the memory. However, there is no control means that locks with information based on the opening and closing of the door, means that is controlled by an arbitrary setting of time, and control means that locks the door to maintain an appropriate state based on internal conditions. . Accordingly, this type of electronic lock has a problem that must be solved by controlling the door lock based on the use state and the internal state.

[0004]

According to a first aspect of the present invention, an electronic lock is attached to a door opening / closing portion of a refrigerator.
A drive coil and a plunger are provided .
Reset based on the signal from the switch
If it is not input within the set time, the drive
Lock the door by projecting the plunger with il
The lock will be released by input using the electronic key means.
A first timer circuit, which operates as follows, and a start switch
At a fixed time irrespective of the first timer circuit
The plunger protrudes with the drive coil in between
Then, the door is locked and at the end of the predetermined time,
A second timer circuit operable to release the locked state of the door, and a control method of the refrigerator with an electronic lock , wherein the opening and closing control of the door is performed. An electronic lock is attached to a door opening / closing part of the refrigerator, the electronic lock is provided with a drive coil and a plunger, and a temperature sensor for detecting a temperature in the refrigerator, and cooling is performed based on the temperature detected by the temperature sensor. frozen
A temperature control circuit for operating and stopping the means is provided.
If the temperature inside the chamber exceeds the upper and lower limits of the temperature,
By the output of the temperature control circuit, the operation of the cooling / refrigeration means
At the same time, an alarm is issued and the drive coil
The door so that the door is locked
Alarm circuit operates and the timer circuit sets
The continuation time of the abnormality of the internal temperature with respect to a certain time is short.
If not, unlock the door and stop the alarm.
Stop, and if it is long, keep the door locked
By operating to continue the alarm,
The present invention relates to a control method of a refrigerator with an electronic lock , characterized in that the abnormality of the refrigerator is temporally monitored , and a third invention is to attach an electronic lock to a door opening / closing portion of the refrigerator, and the electronic lock is driven. With coil and plunger, front
If the storage temperature is higher than the set value,
Operate the cooling compressor in the regulating circuit and lock the door.
The plunger with the drive coil based on
To lock the door and lock the door.
A first door lock timer circuit for determining a release time;
The operation of the refrigerating compressor is continued and the refrigerator
Operating a timer circuit narrowing narrowing cooled carry out the cold of
However, the temperature in the refrigerator does not drop to the set value even after a certain period of time.
If not, the cooling timer circuit continues to operate
To continue the operation of the cooling compressor,
For cooling by counting up of the squat timer circuit
Stopping the operation of the compressor, and then the first door
Lock the door by counting up the lock timer circuit.
A method for controlling a refrigerator with an electronic lock, characterized by releasing a lock state .
A defrost circuit, a defrost timer circuit for issuing a defrost signal at a constant cycle, and a second door lock timer.
Circuit and an output of the defrost timer circuit.
Self-hold and output to the second door lock timer circuit.
A self-holding circuit for releasing self-holding based on the
In the self-holding state of the self-holding circuit, the cooling
The cooling compressor
Sir operation is stopped and defrost operation is started.
The defrost operation is performed by the second door lock timer circuit.
Ending, the first door lock timer circuit counts
A control for releasing the locked state of the door with a tap is added.

[0005]

According to the present invention, the door is locked based on the information on the opening and closing of the door, and the door is locked so as to temporarily prohibit the opening and closing of the door based on the information on the internal temperature. In addition to being useful for checking, it also performs defrosting while the door is locked, so that the foodstuffs stored inside can be stored and maintained in an appropriate state.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail with reference to several embodiments shown in the drawings. In the first embodiment shown in FIGS. 1 to 5, reference numeral 1 denotes, for example, a commercial refrigerator main body, the inside of which is partitioned into a plurality of rooms based on a use mode, and each room has a door 2 respectively.
Is attached. In this case, a beam member or a columnar body 3 is attached to the front side so as to partition the chamber and to stably close the door 2, and when four doors 2 are provided, the columnar body is 3 is mounted in a cross or cross shape. A control panel unit 4 is attached to the upper part on the front side of the refrigerator main body. By operating the control panel 4, the temperature inside the refrigerator can be appropriately selected.

In the refrigerator in which the interior of the refrigerator is divided into a plurality of rooms and a plurality of doors 2 are mounted, the opening and closing of the doors is controlled. It is attached to the crossing central portion of the columnar body 3 to be crossed.

As shown in FIG. 2 and FIG. 3, the lock 5 has a rectangular box shape as a whole, and a pair of plungers 6 and 7 which protrude and retract are provided therein, and four locks are provided. Door 2
On the other hand, these plungers come and go with the excitation of the drive coils 8 and 9 to perform locking and unlocking. A concave portion 2a is provided on the door 2 side corresponding to each plunger. When the door 2 is closed, the concave portion 2a and the plunger face each other.

FIG. 4 shows an example of a control circuit of the lock 5. This control is performed when the refrigerator is not used for a long time, such as at night or on holidays, or when the door is not opened and closed for several hours, for example, three hours or more, that is, when the door is closed for a certain period of time, Even if the door is not locked, the door 2 is automatically locked, and the control circuit can lock the door 2 until the end of the thawing time when thawing in an ice bath, etc., and control the ideal state. is there.

The control circuit includes a first timer circuit 11 which is reset by the output of the electronic key means 10 using, for example, a personal identification number, and a second timer circuit 13 having a self-holding circuit 12 which can appropriately set a timer time. When,
The driving circuit 14 includes a driving circuit 14 such as a transistor driven by the timer circuit, and a relay circuit 15 driven by turning on / off the driving circuit.
An indicator lamp 16 is connected to the timer circuit 13, and the relay circuit 15 is provided with a normally open relay contact 18 which is opened and closed by a relay coil 17, and the relay contact 18 drives the plunger of the lock 5. The coils 8 and 9 are connected. Reference numeral 19 denotes an opening / closing switch for the door 2, and reference numeral 20 denotes a start switch for the second timer circuit 13.

[0011] Time showing the operation of the control circuit in FIG. 5
Explaining based on a chart , usually, the door 2 is frequently opened and closed by taking in and out of food in the refrigerator. By the opening and closing of the door 2, a signal based on opening and closing, that is, a reset signal is input from the switch 19 to the first timer circuit 11, and the operation (transmission) of the timer circuit 11 is interrupted. This interruption can be set within a fixed time, for example, within 1 to 3 hours by setting a timer circuit. When a signal for opening and closing the door is input within the set time, the operation of the timer circuit 11 is stopped. The timer operation is suspended, and the timer operation is restarted from the time of the suspension.

Accordingly, the time T for temporarily locking the door is
_{If 1} is set to 3 hours, there will be 3 hours from when the door is opened until the next door is opened. However, if this is exceeded, that is, if there is no opening and closing of the door within 3 hours, the door will be closed. Time T is T
> When a relationship of T _1, the output from the timer circuit 11 is high level H, and the drive circuit 14 is turned on, the relay coil 17 is excited to turn on the relay contact 18, the driving coils 8 and 9 is driven The plungers 6, 7 protrude, and the door is automatically locked.

In order to open the locked door, when a predetermined password is input from the electronic key means 10, a reset signal is input to the timer circuit 11, and the timer circuit 11 is turned off to count from the beginning. I will be. Therefore, the output from the timer circuit 11 becomes low level L and the drive circuit 14 is turned off, so that the excitation of the relay coil 17 is released, the relay contact 18 is opened, and the drive coils 8 and 9 are not energized. The plungers 6 and 7 are immersed, the door is unlocked, and the door can be opened and closed.

In addition, in the case of thawing or aging foods, it is not preferable to open and close the door until the processing is completed. Then, in that case, the second timer circuit 13 is operated by pressing the start switch 20. For example, in order to defrost food, necessary food is stored in a refrigerator, and after the defrost time is set based on the quantity and quality of the food, when the start switch 20 is pressed, the self-holding circuit 12 The output of the high level H is output from the second timer circuit 13, the drive circuit 14 is driven, the relay coil 17 is excited to turn on the relay contact 18, and the drive coils 8, 9 are driven to cause the plungers 6, 7 to be driven. , And the door is automatically locked irrespective of the first timer circuit 11.

When the set decompression time ends,
A low-level signal is output from the second timer circuit 13, the drive circuit 14 is turned off, the excitation of the relay coil 17 is released, the relay contact 18 is opened, and the drive coils 8, 9 are de-energized. The doors 6 and 7 are immersed, the doors are unlocked, and the doors can be opened and closed. At the same time, the display lamp 16 is turned on to notify that the thawing is completed.

The electronic lock 5 is also used for controlling the temperature of the refrigerator and the function of the refrigerator, as in the second embodiment shown in FIGS. That is, if the temperature in the refrigerator rises by several degrees or more, for example, 7 ° C. or more (excluding defrost), the quality of the food in the refrigerator changes and corrodes. The door is locked and the alarm lamp is turned on, and if the lock is not automatically released after a certain period of time, it is notified by flashing of the alarm lamp that there is an abnormality in the device.

In the second embodiment, a resistor 21 and a temperature sensor 22 disposed at a predetermined position in a refrigerator are connected in series, and a temperature control circuit 23 is connected between the resistor 21 and the temperature sensor 22. A first drive circuit 24 such as a transistor is connected to the output side of the temperature control circuit 23, and the drive circuit 24 is provided with a first relay coil 25.

A temperature alarm circuit 27 is connected to the temperature control circuit 23 via a reset switch 26, and a second drive circuit 28 is connected to the output side of the temperature alarm circuit 27.
The second drive circuit 28 has a second relay coil 29 and an alarm lamp 3 connected in parallel with the relay coil 29.
0 is provided. The resistor 31 and the diode 32 are connected in series with the alarm lamp 30.

A timer circuit 33 is connected to the temperature alarm circuit 27, and the output side of the timer circuit 33 is connected between the alarm lamp 30 and the resistor 31 via a blinking circuit 34.

The first relay contact 35 driven by the first relay coil 25 and the second relay contact 36 driven by the second relay coil 29 are provided in separate circuits. The cooling means 37 and the freezing means 38 are connected to one relay contact 35, and the drive coils 8 and 9 of the lock 5 are connected to the second relay contact 36.

The time chart of FIG.
In the case where a negative resistance element such as a thermistor is used as the temperature sensor 22, the resistance value decreases as the temperature in the refrigerator increases, and the output of the temperature control circuit 23 becomes high level H. By driving the first drive circuit 24 to excite the first relay coil 25 and turn on the first relay contact 35, the cooling and freezing means in the refrigerator operates to lower the temperature in the refrigerator. This operation is performed by the temperature sensor 2
The temperature difference rises and falls at a certain level by turning on and off the temperature control circuit 23 based on the temperature detection of 2,
This is the normal operation.

However, when the temperature inside the refrigerator exceeds an upper and lower range of the temperature at a constant level in a normal state for some reason, that is, when the temperature inside the refrigerator becomes higher than the abnormal temperature T.degree. Of course, the operation of the cooling and freezing means in the refrigerator by the output of 23 is performed, but in addition to that, the temperature alarm circuit 27 is turned on, the output becomes high level H, and the second drive circuit 28 is driven to excite the second relay coil 29 and the second relay contact 36
Is turned on, the drive coils 8 and 9 are driven, and the plungers 6 and
7 is projected and the door 2 is locked. At this time, the alarm lamp 30 is pulled down to a low level via the diode 32 and lights up.

By the above operation, it is notified that the inside temperature is abnormal, and the door 2 is moved to lower the inside temperature.
Are locked so that they cannot be opened and closed, and the driving of the timer circuit 33 is started to temporally monitor the abnormal temperature.

The driving of the timer circuit 33 is set for a fixed time t, for example, one hour. If the internal temperature falls to a predetermined temperature within that time, the output of the temperature control circuit 23 changes from high level H to low level. L, turns off the first drive circuit 24, stops the operation of the cooling / refrigeration means,
At the same time, the signal is input to the temperature alarm circuit 27, the output of the temperature alarm circuit 27 also changes from the high level H to the low level L, and the driving of the second drive circuit 28 is stopped, whereby the alarm lamp 30 is turned off. At the same time plunger 6,
7, the door 2 can be opened and closed, and the driving of the timer circuit 33 is stopped. Such a state means that the use condition of the refrigerator was severe.

However, in the above situation, if the internal temperature does not decrease to the predetermined temperature within the predetermined time t (one hour), that is, if the abnormal temperature continues and the predetermined time elapses, the timer circuit 33 From the high level H to the low level L, the blinking circuit 34 operates and the alarm lamp 30 changes from lighting to blinking. In this case, the cooling function of the refrigerator often has a problem, and it is necessary to perform maintenance and inspection for repair.

When the above-mentioned alarm lamp 30 blinks,
Door 2 remains locked but reset switch 2
By operating 6, the door can be unlocked. That is, the door may need to be opened and closed under any circumstances, and the reset switch 26 can open and close the door by unlocking the door in any case, prior to the temperature control circuit. Then, once operated, the state, that is, the unlocked state is continued thereafter. However, when the signal from the reset switch 26 disappears, the locked state can be automatically set again.

Further, in addition to the above-described temperature control, an electronic lock type lock 5 is used to adjust the inside temperature of the refrigerator when it is in use and when it is not in use, as shown in FIGS. A third embodiment in which energy is efficiently saved and energy is saved is shown.

In the third embodiment, a first drive circuit 40 driven by receiving a door lock signal issued by appropriate means, a second drive circuit 42 driven by a defrost circuit 41, and a temperature sensor And a third drive circuit 44 driven by turning on / off the temperature adjustment circuit 43 based on the temperature detection at 22.
, A second relay coil 46, and a third relay coil 47.

The first relay contact 48 corresponding to the first relay coil 45, the second relay contact 49 corresponding to the second relay coil 46, and the third relay coil 4
7 is provided in a separate circuit, and the first relay contact 48 is connected to the drive coil 6 of the lock 5.
7, a second relay contact is connected to a defrost heater 51, a third relay contact 50 is connected to an open contact of the second relay contact, and a cooling compressor 52 is connected to this relay contact 50. Have been. Substantially, the defrost heater 51 and the cooling compressor 52
And will be connected in parallel.

A cooling timer circuit 53 driven by the door lock signal, a first door lock timer circuit 54
The second door lock timer circuit 55 is connected to the first door lock timer circuit, and the release self-holding circuit 56 is connected to the cooling timer circuit 53. The release self-holding circuit 56 operates in response to the door lock signal and is reset by the third drive circuit 44,
Further, it is output to the cooling timer circuit 53.

A defrost self-holding circuit 57 is connected to the output side of the second door lock circuit 55, and is connected between the resistor 21 and the temperature sensor 22 via a resistor 58 and a diode 59. is there. The output side of the defrost self-holding circuit is connected to the defrost circuit 4.
1 and the cooling timer circuit 53, and the defrost self-holding circuit 57 is connected to a defrost timer circuit 60 that emits a defrost signal at a constant cycle.

The tie of FIG. 9 the operation in the third embodiment
If the temperature inside the refrigerator is higher than the set value due to the use of the refrigerator, the temperature is detected by the temperature sensor 22, the temperature adjustment circuit 43 is driven, and the drive circuit 44 is turned on. As a result, the third relay contact 50 is turned on, and the cooling compressor 52 is driven to perform cooling. This is a normal cooling means.

When the internal temperature rises above the set value and the temperature continues to maintain a high value, a door lock signal is output, the drive circuit 40 is turned on, the relay contact 48 is turned on, and the exciting coils 6 and 7 are turned on. Is excited, the plunger protrudes, and the door is locked. At the same time, the cooling timer circuit 53 and the first and second door lock timer circuits 54 and 55 operate. However, since the door cannot be opened or closed by the door lock, the temperature in the refrigerator gradually becomes the set value with time. Toward
And the above-described operation cycle is repeated up to the set value . This temperature control is controlled by the temperature sensor 22 maintained at a set value by the temperature adjustment circuit 43. Then, when the internal temperature falls to the set value, the third drive circuit 44
Is turned off, the release self-holding circuit 56 is reset,
The cooling timer circuit 53 is reset by the output, and the cooling is stopped .

If the internal temperature does not drop to the set value even after the elapse of a certain time, the third drive circuit 44 continues to be turned on, the cooling timer circuit 53 continues its operation, and the output goes low. keep. In this case, even if the defrost timer circuit 60 outputs a defrost signal and turns on the self-holding circuit 57 to output a high H signal, the cooling-down timer circuit 53 pulls the signal to low L, so that the defrost timer circuit 60 immediately enters the defrost. However, the defrosting operation is started by the count-up of the cooling timer circuit 53 (see the dotted line of the internal temperature). That is, the defrost circuit 41
Operates, the second drive circuit operates to switch the second relay contact 49, and energizes the defrost heater 51 to perform defrost. In this case, the third relay contact 5
Even if 0 is on, the circuit is turned off by the defrost operation.

When the internal temperature has cooled to the set value, the defrost signal is received and the defrost operation is started (see the solid line of the internal temperature). Even if the time to enter the defrost is shifted due to the relationship, the operation is not influenced by the output of the defrost timer.

After the defrost recovery, the internal temperature of the refrigerator is raised to a higher temperature side because the defrost self-holding circuit 57 operates and the output is high H, so that the temperature adjustment operation is shifted to a higher temperature side. To save energy for cooling. This is because the door is still in a locked state and there is no temperature rise due to opening and closing of the door, so that the temperature can be maintained at a high temperature.

Next, the output of the second door lock timer circuit 55 switches from high H to low L several hours before the door lock is released, and the bias of the temperature sensor 22 is pulled to low L. Is shifted to a lower temperature side, and is maintained at a temperature lower than normal, to prepare for a temperature rise after the door lock is released. Then, the self-holding of the defrost self-holding circuit 57 is released by the output of the second door lock timer circuit 55, and the defrosting circuit 41
Becomes inactive, the second drive circuit 42 is turned off,
The second relay contact 49 is turned off, and the power supply to the defrost heater 51 is cut off.

Further, when the first door lock timer circuit 54 counts up and its output changes from high H to low L, the lock signal is released and the drive of the first drive circuit 40 is turned off, and the first door lock timer circuit 54 is turned off. Since the relay contact 48 is turned off, the excitation of the exciting coils 6 and 7 is released, the plunger is immersed, and the door can be opened and closed. In this manner, a series of operations of the door lock is completed.

In any of the embodiments, in a commercial refrigerator or the like, the frequency of use is too severe to lock the door when not in use and properly hold the stored items, and the temperature in the refrigerator does not drop to the set temperature. In such a case, the door is locked in order to stop the use of the door, and a check of the cooling function or defrosting is functionally performed in association with the lock.

[0040]

As described above, the first invention of the control method for a refrigerator with an electronic lock according to the present invention is to attach an electronic lock to a door opening / closing part of the refrigerator, and the electronic lock is provided with a drive coil . and a plunger, said
Reset based on a signal from the switch when the door is opened or closed
If the signal is not input within the set time,
Protrude the plunger with the drive coil and
Lock the entry door and lock it with the input by electronic key means
A first timer circuit operable to cancel the
Operation with the first timer circuit
Relationship between the plan and the drive coil for a certain time
A second timer circuit operable to project the jar to lock the door to lock the door and release the locked state of the door at the end of the predetermined period of time, thereby controlling the opening and closing of the door. When the refrigerator is not used for a long time, such as on holidays, and the user forgets to close the refrigerator, that is, forgets to lock the food, the food is automatically locked and the food is maintained in an appropriate state during that time, and the second timer is used. The circuit locks the door and inhibits opening and closing until the food is in a proper state of thawing or maturation, thereby providing an excellent effect of not impairing the flavor of the food.

According to a second aspect of the present invention, an electronic lock is attached to a door opening / closing portion of a refrigerator, the electronic lock is provided with a drive coil and a plunger, and a temperature for detecting a temperature inside the refrigerator is detected. A sensor and the temperature of the temperature sensor
Temperature control that operates and stops the cooling / refrigeration means based on temperature detection
A control circuit is installed inside the chamber that exceeds the upper and lower limits of the normal temperature.
When the temperature is abnormal, the output of the temperature control circuit determines
The operation of the cooling and refrigeration means is performed, an alarm is issued, and
Protrude the plunger with the drive coil to open the door
The temperature alarm circuit operates to set the lock state, and the timer
Depending on the circuit, the internal temperature for a fixed time set
If the duration of the abnormality is short, the lock status of the door is changed.
Release the alarm and stop the alarm.If it is long, lock the door.
Operates to keep the alarm state and the alarm
Monitoring the abnormalities in the internal temperature over time
Thereby, it is possible to prevent the quality of food from being impaired due to an increase in the internal temperature due to severe use , and to perform an excellent effect that a cooling function can be checked.

[0042] Further, the third invention, mounting an electronic lock lock the refrigerator door opening and closing part, electronic locking lock is provided with a driving coil and a plunger, the in-compartment temperature
Is higher than the set value, the temperature adjustment circuit
Operate the cooling compressor and, based on the door lock signal,
Then, let the plunger protrude with the drive coil
The door is locked and the door unlock time is
A first door lock timer circuit and a cooling comp
Continue the operation of the lesser and cool down the refrigerator.
The cooling timer circuit that operates
If the temperature does not drop to the set value after a certain period of time,
The cooling timer circuit continues to operate and cools.
Operation of the compressor for cooling
The cooling compressor
Operation is stopped, and then the first door lock timer is stopped.
-Unlock the door by counting up the circuit
By which is adapted to, by performing the door lock until the internal temperature reaches the set value, quality of food low-performing narrowing chilled
It has an excellent effect that lowering can be prevented.

Still further, according to the third aspect of the present invention, a defrost circuit, a defrost timer circuit for generating a defrost signal at a constant cycle, and a second door lock timer circuit are provided .
Path and the output of the defrost timer circuit.
Self-hold and based on the output of the second door lock timer circuit.
A self-holding circuit for canceling the self-holding
The cooling-down timer in the self-holding state of the holding circuit
-The cooling compressor
Operation is stopped and defrost operation is started.
Defrost operation is completed by the second door lock timer circuit.
And counts up the first door lock timer circuit.
With the addition of the control for releasing the locked state of the door, an excellent effect that the defrosting is performed during the door lock to enhance the cooling function and save energy can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an open state of a commercial refrigerator to which an electronic lock according to the present invention is attached.

FIG. 2 is an enlarged perspective view of a main part of a commercial refrigerator to which an electronic lock according to the present invention is attached.

FIG. 3 is an enlarged view showing a cross section of a main part of a commercial refrigerator to which an electronic lock according to the present invention is attached.

FIG. 4 is a first diagram for controlling the electronic lock of the present invention.
It is a schematic circuit diagram of an example.

FIG. 5 is a time chart showing an operation state of the circuit diagram of the first embodiment according to the present invention.

FIG. 6 is a second view for controlling the electronic lock of the present invention.
It is a schematic circuit diagram of an example.

FIG. 7 is a time chart showing an operation state of the circuit diagram of the second embodiment according to the present invention.

FIG. 8 shows a third control of the electronic lock of the present invention.
It is a schematic circuit diagram of an example.

FIG. 9 is a time chart showing an operation state of the circuit diagram of the third embodiment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commercial refrigerator main body 2 Door 2a recess 3 Columnar body 4 Control panel 5 Electronic lock type lock 6, 7 Plunger 8, 9 Drive coil 10 Electronic key means 11 First timer circuit 12 Self-holding circuit 13 Second Timer circuit 14 Drive circuit 15 Relay circuit 16 Indicator lamp 17 Relay coil 18 Relay contact 19 Open / close switch 20 Start switch 21 Resistance 22 Temperature sensor 23 Temperature control circuit 24 First drive circuit 25 First relay coil 26 Reset switch 27 Temperature alarm Circuit 28 Second drive circuit 29 Second relay coil 30 Alarm lamp 31 Resistance 32 Diode 33 Timer circuit 34 Flashing circuit 35 First relay contact 36 Second relay contact 37 Cooling means 38 Freezing means 38 40 First drive Circuit 41 Defrost Circuit 42 Second drive circuit 43 Temperature adjustment circuit 44 Third drive circuit 45 First relay coil 46 Second relay coil 47 Third relay coil 48 First relay contact 49 Second relay contact 50 Third Relay contact 51 defrost heater 52 cooling compressor 53 cooling down timer circuit 54 first door lock timer circuit 55 second door lock timer circuit 56 release self-holding circuit 57 defrost self-holding circuit 58 resistor 59 diode 60 defrost timer circuit H High level L Low level

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F25D 23/02 F25D 11/00-13/00

Claims (6)

(57) [Claims] An electronic lock is attached to a door opening / closing part of a refrigerator, the electronic lock is provided with a drive coil and a plunger, and a signal from a switch by opening and closing the door is provided.
Signal is reset based on the signal and within the specified time set by the signal
If it is not input to the
The door is locked by projecting the jar and
The first operation operates to release the lock by an input
The first circuit is operated by the operation of a timer circuit and a start switch.
Drive for a fixed time regardless of the timer circuit of
Lock the door by projecting the plunger with a coil.
Lock state at the end of the fixed time.
In a second timer circuit operable to release the
A method for controlling a refrigerator with an electronic lock , wherein opening and closing of a door is controlled. 2. The method according to claim 1, wherein the second timer circuit is provided with the predetermined time.
The control method for a refrigerator with an electronic lock according to claim 1, further comprising a display unit for displaying the end . 3. An electronic lock type lock is attached to a door opening / closing part of a refrigerator, the electronic lock type lock includes a drive coil and a plunger, and detects a temperature inside the refrigerator . Cooling and cooling based on temperature detection
Temperature control circuit for operating and stopping the freezing means
If the temperature inside the refrigerator exceeds the upper and lower limits of the temperature,
By the output of the temperature control circuit, the operation of the cooling / refrigeration means is performed.
Is performed, an alarm is issued, and the drive coil
So that the door is locked by projecting the lancer
The temperature alarm circuit operates and the timer circuit
The duration of the abnormality of the internal temperature for a given time,
If it is short, unlock the door and issue an alarm
Stop, and if it is long, keep the door locked.
By operating to keep the alarm
A method for controlling a refrigerator with an electronic lock , characterized in that abnormalities are monitored over time . 4. The control method for a refrigerator with an electronic lock according to claim 3, wherein the temperature alarm circuit includes an alarm lamp for performing the alarm. 5. An electronic lock type lock is attached to a door opening / closing part of a refrigerator, the electronic lock type lock includes a drive coil and a plunger, and the temperature in the refrigerator rises above a set value.
Value, the cooling compressor is turned on by the temperature adjustment circuit.
Driving, and with the drive coil based on the door lock signal
When the door is locked by projecting the plunger
A first door locker that both sets the door unlock time;
Continue operation of the Immer circuit and the cooling compressor
Cooling tie for cooling in the refrigerator
When the internal circuit temperature is activated for a certain period of time,
If the temperature does not drop to the set value,
The circuit continues to operate and operates the cooling compressor.
The cooling down timer circuit counts up
Operation of the cooling compressor is stopped at the
After that, the first door lock timer circuit counts up.
Wherein the locked state of the door is released . 6. A defrost circuit, a defrost timer circuit for generating a defrost signal at a constant cycle, and a second door.
Clock timer circuit and the output of the defrost timer circuit.
Self-hold based on the force and the second door lock timer
Self-holding circuit that releases self-holding based on
The cooling circuit in the self-holding state of the self-holding circuit.
For cooling by counting up of the squat timer circuit
Stop compressor operation and start defrost operation.
Then, the differential is performed by the second door lock timer circuit.
Terminating a lost operation, the first door lock timer circuit
Release the locked state of the door by counting up
The control method for a refrigerator with an electronic lock according to claim 5, wherein