JP2002267310A - Controller for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator having a controller for detecting the generation of clogging of a filter provided in a machine chamber of the refrigerator due to dust. SOLUTION: The controller for the refrigerator comprises a fan current detecting means 22 for a compressor and a fan current deciding means 23 for a compressor. When the clogging of the filter is generated, the current value of a fan 19 for the compressor increases. Thus, when the current value of the fan 19 for the compressor is a setting value or higher, the clogging of the filter can be detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator using a compressor, and more particularly to a refrigerator in which the compressor is cooled by a blower.

[0002]

2. Description of the Related Art A conventional example of a warning due to a rise in the temperature of a machine room in a refrigerator is disclosed in Japanese Patent Application Laid-Open No. 7-270003. The configuration will be described below with reference to FIGS. 9 and 10.

In FIG. 9, 1 is a refrigerator main body, 2 is a freezing room, and 3 is a refrigerator room. Reference numeral 4 denotes a machine room, which is provided below the refrigerator main body 1. Reference numeral 5 denotes a compressor, and a discharge pipe 6 of the compressor 5 is provided with a discharge temperature sensor 7. Reference numeral 8 denotes an internal temperature sensor, 9 denotes internal temperature detecting means for detecting the temperature of the freezer compartment 2 by the internal temperature sensor 8, and 10 denotes the internal temperature detected by the internal temperature detecting means 9. Is an internal temperature determining means for determining whether the temperature is within the set temperature range. Reference numeral 11 denotes compressor driving means for driving the compressor 5. 12 is a discharge temperature detecting means for detecting the temperature of the discharge pipe by the discharge temperature sensor 7, and 13 is a discharge temperature determining means for determining whether the discharge temperature detected by the discharge temperature detecting means 12 is within a set temperature range. It is. Reference numeral 14 denotes an alarm device such as a buzzer or an LED, and reference numeral 15 denotes alarm means for driving the alarm device 14.

[0004] The operation of the refrigerator control device configured as described above will be described with reference to the flowchart of FIG.

First, in step 100, the refrigerator temperature detecting means 9 detects the temperature in the freezer compartment 2 by the refrigerator temperature sensor 8. Next, in step 101, the internal temperature determination means 1
At 0, it is determined whether the temperature is higher or lower than a set temperature (for example, −20 ° C.). If the temperature is higher, the process proceeds to step 102. In step 102, the compressor 5 is operated by the compressor driving means 11,
Proceed to step 104. In Step 103, the compressor driving means 11 stops the compressor 5. Step 10
In 4, the discharge temperature detecting means 12 detects the temperature of the discharge pipe 6 by the discharge temperature sensor 7. Next, in step 105, the discharge temperature determining means 13 determines whether the temperature is higher or lower than the set temperature. If the temperature is higher, the process proceeds to step 106; In step 106, the discharge temperature determining means 13 determines whether the state in which the discharge temperature is higher than the set temperature is equal to or longer than the set time, and if it is longer than the set time, proceeds to step 107; In step 107, it is considered that the temperature of the machine room 4 has become high, and the alarm unit 15 outputs an alarm so as to give an alarm.

[0006]

However, in the above-described conventional configuration, the cause of the temperature rise of the discharge temperature sensor 7 has not been identified and is unknown.

[0007] The present invention solves the conventional problems.
An object of the present invention is to detect clogging of a filter installed in a machine room, which is considered to be a cause of a machine room temperature rise.

[0008]

According to a first aspect of the present invention, there is provided a compressor for use in a machine room, and a blower for a compressor provided in a machine room for housing the compressor and forcibly cooling the compressor. And, in a refrigerator provided with a filter for reducing the intrusion of dust and dirt into the machine room, the current value detected by the compressor blower current detecting means for detecting the current of the compressor blower, When it is determined by the compressor current determination means that determines the current value of the compressor blower that the current value is equal to or greater than the set value, the filter is to detect clogging of the filter. This has the effect that the surrounding dust and the accumulation status of dust can be grasped.

The invention described in claim 2 is the first invention.
The invention according to the above, further comprising an alarm device, an alarm means for performing an alarm when the clogging of the filter is detected, whereby when the clogging of the filter is detected, the alarm means outputs to the alarm device, This has the effect of notifying the user.

[0010] Further, the invention according to claim 3 is based on claim 1.
Or a compressor control device for controlling the operation state of the compressor and a control device for a refrigerator including a compressor drive device for driving the compressor, wherein the compressor is compressed when a clogging of the filter is detected. The compressor is provided with a compressor rotating means for rotating the compressor at a low speed, which has an effect that the load on the compressor can be reduced.

The invention described in claim 4 is the first invention.
Or the internal blower for forcibly ventilating the cool air into the refrigerator, an internal blower driving means for driving the internal blower, and an internal blower for controlling the internal blower. A refrigerator equipped with a control means, which is provided with an internal fan rotation means for rotating the internal fan at a low speed when a filter clogging is detected, thereby detecting the filter clogging. Thus, the load on the cooling system can be reduced by rotating the in-compartment blower at a low speed.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a refrigerator control device according to an embodiment of the present invention.

(Embodiment 1) FIG. 1 is a block diagram of a control device for a refrigerator according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 16 denotes an outside air temperature sensor, and 17 denotes an outside air temperature sensor 16. An outside air temperature detecting means for detecting the outside air temperature, and an outside air temperature determining means 18 for determining whether or not the outside air temperature detected by the outside air temperature detecting means 17 is within a set temperature range. 19 is a compressor blower for forcibly cooling the compressor, 20 is a compressor blower control means for controlling the operation state of the compressor blower 19, and 21 is a compressor blower for driving the compressor blower 19 This is blower driving means. 22 is a compressor blower current detecting means for detecting the current value of the compressor blower 19, and 23 is a compressor blower for judging whether the current value detected by the compressor blower current detecting means 22 is equal to or larger than a set value. It is a blower current judging means. 2
Reference numeral 4 denotes a filter installed in the machine room 4.

With reference to the flowchart of FIG. 2, the following describes the refrigerator control device configured as described above.
The operation will be described.

In step 200, the outside air temperature detecting means 17
, The outside air temperature sensor 16 detects the outside air temperature. Next, in step 201, the outside air temperature determining means 18 determines whether the temperature is higher or lower than the set temperature.
The process proceeds to step 203, and if it is low, the process proceeds to step 203.

In step 202, since the internal temperature of the compressor is high in the internal temperature judging means 10 of the compressor blower control means 20 and the external air temperature is high in the external air temperature judging means 18, the blower driving means 21 for the compressor controls the compressor. The blower 19 is operated, and the process proceeds to step 204.

In step 203, since the internal temperature is high in the internal temperature judging means 10 and the external temperature is low in the external air temperature judging means 18 in the compressor air blower control means 20, the air blower driving means 21 for the compressor is used. The blower 19 is stopped. In step 204, the current value of the compressor blower 19 is detected by the compressor blower current detecting means 22.

Next, at step 205, it is judged by the compressor blower current judging means 23 whether it is higher or lower than the set value. If it is higher, the clogging of the filter 24 is detected at step 206. If the current value is low, the process returns to step 100.

Therefore, in this embodiment, when the filter 24 is clogged, the current value of the compressor blower 19 increases, so that when the current value of the compressor blower 19 exceeds a set value, the filter 24 Clogging can be detected.

(Embodiment 2) FIG. 3 is a block diagram of a control device for a refrigerator according to Embodiment 2 of the present invention. In FIG. 3, reference numeral 25 denotes an alarm device, and 26 denotes an alarm device 2.
5 is an alarming means for driving 5. The operation of the refrigerator control device configured as described above will be described below with reference to the flowchart of FIG.

In step 205, the compressor blower current judging means 23 judges whether it is higher or lower than the set value. If it is higher, the clogging of the filter 24 is detected in step 206, and the routine proceeds to step 300. If the current value is low, the process returns to step 100. In step 300, the filter 24
In order to notify the user of the clogging, the alarm device 26 outputs the alarm to the alarm device 25, and the process returns to step 100.

Therefore, in this embodiment, when the filter 24 is clogged, the current value of the compressor blower 19 increases, so that when the current value of the compressor blower 19 exceeds a set value, the filter 24 The clogging of the filter 24 can be notified to the user to detect the clogging and give an alarm by the alarm device 25.

(Embodiment 3) FIG. 5 is a block diagram of a control device for a refrigerator according to Embodiment 3 of the present invention. In FIG. 5, reference numeral 27 denotes compressor control means for controlling the operation state of the compressor 5. Reference numeral 28 denotes compressor rotating means for operating the compressor 5 at normal rotation or low-speed rotation, and reference numeral 29 denotes compressor driving means for driving the compressor 5. The operation of the control device of the refrigerator configured as described above will be described below with reference to the flowchart of FIG.

In step 205, the compressor blower current determination means 23 determines whether the value is higher or lower than the set value. If the value is higher, the clogging of the filter 24 is detected in step 206, and the routine proceeds to step 300. If the current value is low, the routine proceeds to step 400, where the compressor rotating means 28 operates the compressor 5 at normal rotation, and the compressor driving means 29 causes the compressor 5 to operate normally.

In step 300, the alarm means 26 notifies the user of the clogging of the filter 24 by the alarm means 26.
5 and output to step 401. Step 401
Then, the compressor 5 is operated at low speed by the compressor rotating means 28, and the compressor 5 is operated at low speed by the compressor driving means 29.

Therefore, in this embodiment, when the filter 24 is clogged, the current value of the compressor blower 19 increases, so that when the current value of the compressor blower 19 exceeds a set value, the filter 24 The clogging of the filter 24 is notified to the user to detect clogging and an alarm is issued by the alarm device 25. When the clogging of the filter 24 is performed, the compressor 5 is operated at a low speed, thereby reducing the load on the compressor 5. Can be.

(Embodiment 4) FIG. 7 is a block diagram of a control device for a refrigerator according to Embodiment 4 of the present invention. In FIG. And an in-compartment blower for forcibly ventilating the refrigerator compartment, and 31 is an in-compartment blower control means for controlling the operation state of the in-compartment blower 30.

Numeral 32 denotes an internal fan rotating means for operating the internal fan 30 at normal rotation or low speed rotation.
Reference numeral 3 denotes an in-compartment blower driving unit that drives the in-compartment blower 30. The operation of the refrigerator control device configured as described above will be described below with reference to the flowchart of FIG.

In step 205, the compressor blower current determination means 23 determines whether the value is higher or lower than the set value. If the value is higher, the clogging of the filter 24 is detected in step 206, and the routine proceeds to step 300. If the current value is low, the process proceeds to step 500, in which the in-compartment blower rotating means 32 operates the in-compartment blower 30 at normal rotation, and the in-compartment blower driving means 33 causes the in-compartment blower 30 to operate normally. .

In step 300, the alarm means 26 outputs the alarm to the alarm device 25 in order to notify the user of the clogging of the filter 24, and the routine proceeds to step 501. Step 50
In 1, the in-compartment blower rotating means 32 rotates the in-compartment blower 30.
Is operated at low speed, and the internal fan 30 is operated at low speed by the internal fan drive means 33.

Therefore, in this embodiment, when the filter 24 is clogged, the current value of the compressor blower 19 increases, so that when the current value of the compressor blower 19 exceeds a set value, the filter 24 Since the clogging is detected and an alarm is issued by the alarm device 25, the user is notified of the clogging of the filter 24. At the time of clogging of the filter 24, the in-compartment blower 30 is operated at a low speed, thereby reducing the load on the cooling system. be able to.

[0032]

As described above, according to the first aspect of the present invention, the current value detected by the compressor blower current detecting means for detecting the current of the compressor blower is the current value of the compressor blower. When it is determined by the compressor current determination means that the value is equal to or greater than the set value, clogging of the filter is detected, so that the reliability of the refrigerator can be ensured.

[0033] The invention described in claim 2 is the same as in claim 1.
In addition to the invention described in the above, since it is provided with an alarm means for giving an alarm when the clogging of the filter is detected, when the clogging of the filter is detected, an alarm is output to the alarm device by the alarm means, and the user can be prompted to clean. it can.

The third aspect of the present invention is the first aspect of the present invention.
Or a compressor control device for controlling the operation state of the compressor according to the invention described in 2 and a control device for a refrigerator including a compressor drive device for driving the compressor, wherein when the clogging of the filter is detected, The compressor is provided with a compressor rotating means for rotating the rotating speed at a low speed, so that the load on the compressor can be reduced and the efficiency can be increased.

The invention described in claim 4 is the first invention.
In the invention according to the second aspect, further, an in-compartment blower for forcibly ventilating cool air into the in-compartment, an in-compartment blower driving means for driving the in-compartment blower, and an in-compartment blower for controlling the in-compartment blower In the refrigerator equipped with the control means, when the clogging of the filter is detected, the refrigerator is provided with an internal fan rotating means for rotating the internal fan at a low speed, thereby reducing the load on the cooling system and reducing power consumption. The amount can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 3 is a block diagram of a control device of a refrigerator according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the second embodiment of the present invention.

FIG. 5 is a block diagram of a refrigerator control device according to a third embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the third embodiment of the present invention.

FIG. 7 is a block diagram of a refrigerator control device according to a fourth embodiment of the present invention.

FIG. 8 is a flowchart showing the operation of the fourth embodiment of the present invention.

FIG. 9 is a block diagram of a conventional refrigerator control device.

FIG. 10 is a flowchart showing the operation of a conventional refrigerator.

[Explanation of symbols]

 5 Compressor 9 Internal temperature detecting means 19 Blower for compressor 22 Blower current detecting means for compressor 23 Blower current determining means for compressor 24 Filter 25 Alarm device 26 Alarm means 27 Compressor control means 28 Compressor rotating means 29 Compression Machine drive means 30 Internal blower 31 Internal blower control means 32 Internal blower rotating means 33 Internal blower drive means

Claims (4)

[Claims] 1. A compressor in a machine room, a compressor blower provided in the machine room accommodating the compressor and forcibly cooling the compressor, and reducing intrusion of dust and dirt into the machine room. Current value detected by the compressor blower current detecting means for detecting the current of the compressor blower for determining the current value of the compressor blower. A controller for detecting clogging of the filter when it is determined that the filter is equal to or greater than a set value. 2. An alarm means for issuing an alarm when clogging of a filter is detected.
A control device for a refrigerator as described in the above. 3. A control device for a refrigerator comprising: compressor control means for controlling an operation state of a compressor; and a compressor control means for driving the compressor. 3. The control device for a refrigerator according to claim 1, further comprising a compressor rotating means for rotating the refrigerator at a low speed. 4. An in-compartment blower for forcing cool air into the compartment, an in-compartment blower driving means for driving the in-compartment blower, and an in-compartment blower control means for controlling the in-compartment blower. The refrigerator control device according to claim 1 or 2, wherein the refrigerator provided with an internal fan rotating means for rotating the internal fan at a low speed when the clogging of the filter is detected.