JP3051197B2 - Refrigerator temperature controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device for a refrigerator.

[0002]

2. Description of the Related Art For example, as shown in Japanese Utility Model Laid-Open Publication No. 1-63971, a conventional temperature control device for a refrigerator includes a temperature detector for detecting a temperature in a refrigerator, a variable resistor for setting a target temperature, and a temperature control device. Abnormality diagnosis means for diagnosing abnormality of the detector;
A temperature control unit that receives a signal from the temperature detector and a signal from the variable resistor, a timer that receives a signal from the abnormality diagnosis unit and generates a constant ON / OFF signal, and a timer that receives a signal from the temperature control unit and the timer. Load control means for receiving a signal as input and controlling the load.

With this configuration, when the temperature detector is abnormal, the load is controlled by the ON / OFF signal of a fixed period only from the timer, regardless of the target internal temperature.

[0004]

However, in the above-mentioned conventional configuration, when the temperature detecting means is abnormal, the internal temperature control is performed by turning on and off of the fixed period from the timer section.
Since the load is controlled by the F signal, the temperature inside the refrigerator is not related to the target temperature inside the refrigerator. The target internal temperature is set according to the contents, and when the temperature detecting means is abnormal, the internal temperature control irrelevant to the target internal temperature has a disadvantage that the freshness of the stored food and the like is reduced.

The present invention solves the above-mentioned conventional problems.
Therefore, an object of the present invention is to provide a refrigerator temperature control device capable of performing internal temperature control in accordance with a target internal temperature even when an abnormality occurs in the temperature detection means.

[0006]

In order to achieve this object, a refrigerator temperature control device according to the present invention comprises a temperature detecting means.
The detected internal temperature is the value set by the temperature setting means.
When the temperature is higher than the temperature in the warehouse, the load is
Is operated to cool the inside of the refrigerator, and the temperature is detected by the temperature detecting means.
The known internal temperature was set by the temperature setting means.
When the temperature is lower than the target internal temperature, via the load control means
The main control unit that stops the load and stops the cooling
A temperature control device for a refrigerator having
The temperature inside the refrigerator detected by the step is out of the specified temperature range.
Abnormality diagnosis means for diagnosing an abnormality when the
If the normal diagnosis means diagnoses as abnormal,
From the ON and OFF cycles stored for each internal temperature,
Corresponding to the target internal temperature set by the temperature setting means.
ON, OFF cycle, and select the ON, OFF
Timer section that generates ON and OFF signals at OFF cycle
When the abnormality diagnosis means diagnoses an abnormality,
If the timer section generates an ON signal, the negative
The load is operated via the load control means to cool the inside of the
If the timer section is generating an OFF signal,
Stop the load inside the refrigerator by stopping the load via the load control means.
The main control unit is configured to stop the operation.

[0007]

With this configuration, when an abnormality occurs in the temperature detecting means, the main control section outputs ON / OFF signals of a predetermined cycle stored in advance corresponding to each target internal temperature of the temperature setting means generated by the timer section. By performing the inside temperature control based on the inside, the inside temperature can be controlled in accordance with the target inside temperature.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a refrigerator temperature control device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment. In FIG. 1, reference numeral 1 denotes temperature detecting means for detecting the internal temperature and outputting an internal temperature signal, 2 denotes temperature setting means for setting a target internal temperature and outputting a target internal temperature signal, and 3 denotes temperature detecting means 1.
Is an abnormality diagnosis means for diagnosing an abnormality of the temperature detecting means 1 and outputting an abnormal signal when an abnormality occurs and outputting an in-compartment temperature signal when the abnormality is normal. Reference numeral 4 denotes a timer unit which receives a signal from the temperature setting means 2 and generates an ON / OFF signal at a pre-stored cycle corresponding to each target internal temperature.

Reference numeral 5 denotes a main control unit which receives signals from the temperature setting means 2, the abnormality diagnosing means 3 and the timer unit 4, judges each signal, and generates an internal temperature control signal. Reference numeral 6 denotes a load for cooling the inside of the refrigerator, and 7 denotes a load control means connected to the load 6 which receives a signal from the main control unit 5 and controls the load 6.

The operation of the temperature control device for a refrigerator configured as described above will be described with reference to FIG.

The abnormality diagnosing means 3 converts the temperature signal inside the refrigerator (T1) from the temperature detecting means 1 into an abnormal value (S1
.Ltoreq.S2), and the status is constantly monitored (step 1). When an abnormality occurs in the temperature detecting means 1 (T1
≦ S1, S2 ≦ T1), the abnormality diagnosing means 3 outputs an abnormality signal (E
1) is generated (step 2), and when the temperature detecting means 1 is normal (S1 <T1 <S2), the abnormality diagnosing means 3 generates an internal temperature signal (S3) (step 3).

The timer section 4 outputs an ON signal (step 4) if it is an ON cycle in a cycle stored in advance corresponding to the target internal temperature signal (S4) of the temperature setting means 2 and an OFF cycle. If so, an OFF signal is generated (step 5).

The main control unit 5 detects the output signal of the timer unit 4 when the signal from the abnormality diagnosing unit 3 is an abnormal signal, and detects the load signal via the load control unit 7 when the signal is an ON signal.
Is started to cool the inside of the refrigerator (step 6). If the signal is an OFF signal, the load 6 is stopped via the load control means 7 to stop the cooling of the refrigerator (step 7).

When the signal from the abnormality diagnosing means 3 is an internal temperature signal, the target internal temperature signal of the temperature setting means 2 is compared with the internal temperature signal, and the target internal temperature signal is output from the internal temperature signal. If it is smaller than (S4 <S3), the load control means 7
To start the load 6 and cool the inside of the refrigerator (step 8),
When the target internal temperature signal is larger than the internal temperature signal (S
3 ≧ S2), the load 6 is stopped via the load control means 7, and the cooling in the refrigerator is stopped (step 9).

Thereafter, the operations of steps 1 to 9 are sequentially and repeatedly performed. As described above, according to the present embodiment, the temperature detection
The internal temperature T1 detected by the means 1 is the temperature setting means 2
If the temperature is higher than the target internal temperature S4 set by
Operate the load 6 through the load control means 7 to cool the interior
The internal temperature T1 detected by the temperature detecting means 1 is
Lower than the target internal temperature S4 set by the temperature setting means 2.
The load 6 is stopped via the load control means 7
The temperature of the refrigerator having the main control unit 5 for stopping the cooling in the refrigerator
In the temperature control device, the storage detected by the temperature detecting means 1
The internal temperature T1 is out of a predetermined temperature range (S1 to S2).
Abnormality diagnosis means 3 for diagnosing the abnormality
If the diagnosis means 3 diagnoses an abnormality,
From the ON / OFF cycle stored for each internal temperature,
Corresponds to the target internal temperature S4 set by the temperature setting means 2.
ON / OFF cycle to be selected, and the selected O
Timer that generates ON and OFF signals at N and OFF cycles
And the abnormality diagnosing means 3 diagnoses an abnormality.
When the timer unit 4 generates an ON signal,
Operate the load 6 through the load control means 7 to cool the interior
When the timer unit 4 is generating the OFF signal,
The load 6 is stopped via the load control means 7 to cool the inside of the refrigerator.
The main control unit 5 is configured to stop the
Even if an abnormality occurs in means 1, store food in the target storage
It can be cooled to a temperature and can be stored without reducing the freshness of stored food.
Can exist.

[0017]

As described above, the present invention relates to a temperature detecting means.
The detected inside temperature is out of the predetermined temperature range.
Abnormality diagnosis means for diagnosing an abnormality when the abnormality diagnosis
If the disconnection means is diagnosed as abnormal,
From the ON and OFF cycles stored separately,
O corresponding to the target internal temperature set by the temperature setting means.
N, OFF cycle is selected, and the selected ON, OF
And a timer that generates ON and OFF signals in the cycle of F
When the abnormality diagnosis means diagnoses an abnormality,
If the immersion section is generating an ON signal,
The inside of the refrigerator is cooled by operating the load through the step, and the timer
If the controller is generating an OFF signal, the load control
Stop the load in the refrigerator by stopping the load through the means
The main control unit is configured as described above.

As a result, an abnormality occurs in the temperature detecting means.
Stored food can be cooled down to the target
It is possible to provide a high-performance refrigerator temperature control device that can store food without reducing its freshness or the like .

[Brief description of the drawings]

FIG. 1 is a block diagram of a refrigerator temperature control device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the refrigerator temperature control device according to one embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature detection means 2 Temperature setting means 3 Abnormality diagnosis means 4 Timer part 5 Main control part 6 Load 7 Load control means

Claims (1)

(57) [Claims] An internal temperature detected by a temperature detecting means.
Is higher than the target internal temperature set by the temperature setting means.
The load is controlled via the load control
Is cooled, and the temperature in the refrigerator detected by the temperature detecting means.
Is lower than the target internal temperature set by the temperature setting means.
The load is stopped via the load control means.
Of the refrigerator having the main control unit to stop the cooling in the refrigerator
In the temperature control device, the temperature inside the refrigerator detected by the temperature detecting means is a predetermined temperature.
Diagnosis for diagnosing abnormalities when the temperature is out of the range
Means, if the abnormality diagnosis means diagnoses an abnormality,
In the ON / OFF cycle stored for each target internal temperature
The target internal temperature set by the temperature setting means.
Select the corresponding ON / OFF cycle, and select the selected
Tie that generates ON / OFF signal at ON / OFF cycle
A timer section when the abnormality diagnosing means diagnoses an abnormality.
If the unit is generating an ON signal, the load control means
The load is driven through the cooler to cool the inside of the
If the unit generates an OFF signal, the load control
Stop the load through the step to stop the cooling in the refrigerator.
A temperature control device for a refrigerator, comprising the main control unit .