JPH11211307A - Controller for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a control to prevent the inducing of a burning trouble of a winding as caused by a rise in the temperature of a compressor even when a blower for the compressor which forcibly cools the compressor fails to rotate because of a trouble or the like. SOLUTION: When it is detected by a blower rotation detection means 17 and a blower rotation judging means 18 that a blower 7 for a compressor fails to rotate, after a rotation command is received according to an outside air temperature and an in-storage temperature, the temperature of a machine room 5 housing a compressor 6 is detected by a machine room temperature detecting means 22 and when a machine room temperature judging means 23 judges that the temperature of the machine room exceeds the specified first one, the compressor 6 is operated at a low speed. When the temperature of the machine room as judged by the machine room temperature judging means 23 exceeds the second one during the operation in the low speed rotation, the compressor 6 is stopped. It is judged by a number of revolutions of compressor judging means 25 whether the compressor 6 is in the normal rotation or in a low-speed rotation.

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 control device for controlling the compressor which is forcibly cooled by a compressor blower.

[0002]

2. Description of the Related Art In a refrigerator using a compressor, if an abnormality occurs in a compressor blower for forcibly cooling the compressor, means for protecting the compressor is disclosed in Japanese Patent Laid-Open No. 8-27110.
No. 9 discloses this.

Hereinafter, a conventional refrigerator will be described with reference to the drawings. FIG. 8 is a block diagram showing a configuration of a conventional refrigerator control device. 8, 1 is a refrigerator main body, 2 is a partition wall for partitioning the refrigerator main body 1 into a freezer compartment 3 and a refrigerator compartment 4, 5 is a machine room provided at a lower portion of the refrigerator main body 1, 6 is a compressor, and 7 is a compressor. It is a blower for the compressor, and the compressor 6
The compressor blower 7 is provided in the machine room 5.
8 is an inside temperature sensor, 9 is an outside air temperature sensor, 10 is an inside temperature detecting means for detecting the inside temperature of the freezing room 3 by the inside temperature sensor 8, and 11 is an outside air detecting the outside air temperature by the outside air temperature sensor 9. Temperature detecting means 12 is an internal temperature determining means for determining whether or not the internal temperature detected by the internal temperature detecting means 10 is within a predetermined temperature range, and 13 is the outside air detected by the external air temperature detecting means 11. This is an outside air temperature determination unit that determines whether the temperature is within a predetermined temperature range.

[0004] Further, 14 is a compressor driving means for driving the compressor 6, and 15 is an operation of the compressor blower 7 corresponding to the judgment result of the inside temperature judgment means 12 and the judgment result of the outside air temperature judgment means 13. Is a compressor blower control means for controlling the compressor, 16 is a compressor blower drive means for driving the compressor blower 7 under the control of the compressor blower control means 15, and 17 is a rotational state of the compressor blower 7. Blower rotation detection means,
Reference numeral 18 denotes a blower rotation determining means for determining whether the rotation state detected by the blower rotation detecting means 17 is rotation or stop, and 19 denotes a determination result of the internal temperature determining means 12 and a determination result of the blower rotation determining means 18. And compressor 6
The compressor control means 20 for controlling the operation of the compressor 6 is a compressor rotating means for operating the compressor 6 at normal rotation or low speed rotation.

The operation of the above configuration will be described. FIG. 9 is a flowchart showing the operation of the above conventional example. First, in step 100, the inside temperature detecting means 10 detects the inside temperature of the freezing room 3 by the inside temperature sensor 8, and then, in step 101, the inside temperature determining means 12 determines that the inside temperature is a predetermined temperature. For example, it is determined whether the temperature is −20 ° C. or less. If the internal temperature is −20 ° C. or lower, the process proceeds to step 103, where the compressor blower control unit 15 stops the compressor blower 7 by the compressor blower driving unit 16, and proceeds to step 104. Then, the compressor 6 is stopped by the compressor rotating means 20 and the compressor driving means 14.

If the inside temperature is higher than -20.degree. C., the operation proceeds to step 102, and the outside air temperature detecting means 11 detects the outside air temperature by the outside air temperature sensor 9, and proceeds to step 105 to determine the outside air temperature. Means 13 determines whether or not the outside air temperature is a predetermined temperature, for example, 20 ° C. or more.
If the outside air temperature is not lower than 20 ° C., step 106
Then, the compressor blower control means 15 causes the compressor blower driving means 16 to operate the compressor blower 7, and the flow proceeds to step 108, where the blower rotation detecting means 17 rotates the compressor blower 7. Is detected, and step 10 is performed.
In step 9, the blower rotation determination unit 18 determines whether the compressor blower 7 is rotating or stopped. If it is in the stop state, the process proceeds to step 110, in which the compressor 6 is operated at low speed by the compressor driving means 14, and
If it is in the rotating state, the process proceeds to step 111 and the compressor 6 is operated by the compressor driving means 14 at normal rotation.

In step 105, the outside air temperature is set to 20 ° C.
If it is lower, the process proceeds to step 107, where the compressor blower driving means 16 stops the compressor blower 7,
In step 111, the compressor 6 is operated at normal rotation by the compressor driving means 14.

As described above, when the inside temperature is high and the outside air temperature is high, the compressor blower 7 is rotated to forcibly cool the compressor 6, and the compressor blower 7 issues a rotation command. If it had stopped after receiving the order, it was running at low speed.

[0009]

In such a conventional refrigerator control device, the compressor blower is rotated when the internal temperature is high and the outside air temperature is high. If the air blower fails to operate due to a failure or disconnection of the wiring, the compressor is operated at low speed.However, since the operation is continued, when the machine room temperature is high, the cooling effect is insufficient and the compressor cannot operate. There has been a problem that the temperature becomes high, and a burning failure of the winding due to deterioration of heat radiation performance is induced.

The present invention has been made to solve the above-mentioned problems, and a control of a refrigerator capable of preventing a situation in which a winding of a compressor is burned out even if a forced blower of a compressor deteriorates and a forced cooling action is deteriorated due to disconnection of wiring. It is intended to provide a device.

[0011]

SUMMARY OF THE INVENTION The present invention according to a first aspect of the present invention provides an internal temperature detecting means for detecting an internal temperature, an external air temperature detecting means for detecting an external air temperature, and a mechanical chamber for accommodating a compressor. A blower for a compressor that receives a rotation command corresponding to the inside temperature and the outside air temperature and forcibly cools the compressor, and a blower rotation detecting unit that detects a rotation state of the blower for the compressor A machine room temperature sensor provided in the machine room, machine room temperature detecting means for detecting a machine room temperature by the machine room temperature sensor, and determining whether the machine room temperature is equal to or higher than a predetermined temperature. Machine room temperature determining means, compressor rotational speed detecting means for detecting the rotational speed of the compressor, compressor rotational speed determining means for determining the rotational speed of the compressor, and varying the rotational speed of the compressor. Compressor rotating means, and the compressor Compressor driving means for driving, and compressor control means for controlling the operation of the compressor, wherein the compressor control means that the compressor blower is stopped after receiving the rotation command. When detected by the blower rotation detecting means, the temperature of the machine room is equal to a predetermined value in the machine room first.
If the temperature is equal to or higher than, the compressor is operated at a low speed,
A control device for a refrigerator for controlling the compressor to stop when the machine room temperature is equal to or higher than a predetermined machine room second temperature during operation at the low speed rotation.

According to the present invention, when the compressor blower is not rotating after receiving the rotation command, the compressor is rotated at a low speed or stopped according to the temperature of the machine room. In addition, the operation can be controlled so as not to deteriorate the heat radiation performance, and the temperature rise in the machine room can be reduced.

According to a second aspect of the present invention, there is provided a compressor protection stop timer for counting a time during which the compressor is stopped for protection, and the compressor control means is provided after the blower for the compressor receives a rotation command. When detecting that the machine is stopped, if the machine room temperature is equal to or higher than a predetermined machine room first temperature, the compressor is operated at a low speed, and the machine room temperature is set to a predetermined value during the low speed operation. 2. The refrigerator control device according to claim 1, wherein when the temperature is equal to or higher than the second chamber temperature, the compressor is controlled to stop for a predetermined time.

According to the present invention, when the compressor blower is not rotating after receiving the rotation command, the compressor is rotated at a low speed or stopped for a predetermined time in accordance with the temperature of the machine room. The operation can be controlled so that the heat radiation performance is not deteriorated before the burn-in occurs, and the temperature rise in the machine room can be reduced.

According to a third aspect of the present invention, there is provided the control device for a refrigerator according to any one of the first and second aspects, wherein the low-speed rotation is a first low-speed rotation one step lower than the normal rotation.

According to the present invention, when the compressor blower is not rotating after receiving the rotation command, the compressor is rotated at a low speed one step lower than the normal rotation or stopped according to the temperature of the machine room. The operation can be controlled so that the heat radiation performance is not deteriorated before the seizure of the wire occurs, and the temperature rise in the machine room can be reduced.

According to a fourth aspect of the present invention, when the compressor control means detects that the blower for the compressor has stopped after receiving the rotation command, the temperature of the machine room is reduced to a predetermined value in the first machine room.
If the temperature is equal to or higher than the temperature, the compressor is operated at a first low-speed rotation one step lower than the normal rotation, and if the machine room temperature is equal to or higher than a predetermined third temperature during the operation at the first low-speed rotation, the compressor is operated. The compressor is operated at a second low-speed rotation that is one step lower, and if the machine room temperature is equal to or higher than a predetermined second room temperature during the second low-speed rotation, the compressor is stopped. A control device for a refrigerator according to any one of claims 1 and 2.

According to the present invention, when the compressor blower is not rotating after receiving the rotation command, the compressor is gradually rotated at a low speed or stopped in accordance with the machine room temperature.
The operation can be controlled so as not to deteriorate the heat radiation performance until the winding is seized, and the temperature rise in the machine room can be reduced.

According to a fifth aspect of the present invention, there is provided a cold storage temperature determining means for determining whether or not the cold storage temperature detected by the cold storage temperature detecting means is equal to or higher than a predetermined temperature. When it is detected that the compressor blower is stopped after receiving the rotation command, when the machine room temperature is equal to or higher than the predetermined machine room first temperature and the internal temperature is equal to or lower than the predetermined internal first temperature, When the rotation speed of the compressor is operated at a low speed, and the machine room temperature is equal to or higher than a predetermined machine room second temperature and the internal temperature is equal to or lower than a predetermined internal second temperature during the operation at the low speed rotation, The control device for a refrigerator according to claim 1, wherein the control device controls the compressor to stop.

According to the present invention, when the compressor blower is not rotating after receiving the rotation command, the compressor is gradually rotated at a low speed or stopped according to the machine room temperature and the internal temperature. In addition, the operation can be controlled so that the heat radiation performance is not deteriorated before the winding is seized, and the temperature rise in the machine room can be reduced.

[0021]

In the present invention, the inside temperature detecting means detects the inside temperature of the freezing room based on a signal from an inside temperature sensor such as a semiconductor device provided in the freezing room. The outside air temperature detecting means detects the outside air temperature based on a signal from an outside air temperature sensor such as a semiconductor element provided on an outer wall portion of the refrigerator body. Further, the compressor blower is provided in a machine room in which the compressor is stored,
Upon receiving a rotation command corresponding to the inside temperature and the outside air temperature, the compressor rotates and forcibly cools the compressor. in this case,
Generally, when the internal temperature is equal to or higher than a predetermined internal temperature and the outside air temperature is equal to or higher than a predetermined external air temperature, a rotation command is received to rotate. However, this compressor blower may not rotate due to a failure or disconnection of wiring even if a rotation command is received.
The blower rotation detecting means is provided to detect the rotation state, and is realized by a light sensor intermittent due to rotation of the blade, a rotation sensor provided on the motor rotor, and the like.

The machine room temperature detecting means detects the machine room temperature based on a signal from a machine room temperature sensor provided in the machine room, and the machine room temperature determining means makes the machine room temperature a predetermined temperature range, for example, a predetermined temperature or more. It is also determined whether or not the temperature range has been divided in detail. In the present invention, this is an important element for controlling the operation of the compressor in accordance with the temperature of the machine room housing the compressor and the blower for the compressor. The compressor rotation speed detection means is a means for detecting the rotation speed of the compressor, and the compressor rotation speed determination means determines whether the rotation speed of the compressor is normal rotation, low speed rotation, or a stopped state. In this case, it is determined whether the rotation is one step lower than the normal rotation or one step lower than the normal rotation. The compressor rotating means is means for changing the speed of the compressor to a normal rotation, a low speed rotation, and a stopped state, and the compressor driving means is means for driving the compressor by an output of the compressor rotating means. . Further, the compressor control means is means for controlling the operation of the compressor, and each determination result of the in-compartment temperature determination means, the machine room temperature determination means, the blower rotation determination means, and the compressor rotation number determination means. Means for controlling the operation of the compressor based on the control pattern, and the control pattern is as described in each claim.

It is to be noted that the compressor protection stop timer in the present invention according to the second aspect is provided with a time for the compressor control means to stop the compressor for a predetermined set time in response to a rise in the temperature of the machine room or the temperature in the refrigerator. Is a means for measuring

In general, operations relating to detection, determination, and control are mainly realized by program operations of a microcomputer.

Hereinafter, embodiments of the present invention will be described.

[0026]

(Embodiment 1) Hereinafter, Embodiment 1 of a control device for a refrigerator according to the present invention will be described with reference to the drawings. This embodiment relates to claim 1.

FIG. 1 is a block diagram showing the configuration of this embodiment. Note that the same components as those in the conventional example are assigned the same numbers, and detailed descriptions thereof are omitted.

In FIG. 1, reference numeral 21 denotes a machine room temperature sensor,
22 is a machine room temperature detecting means for detecting the machine room temperature in the machine room 5 by the machine room temperature sensor 21, and 23 is whether the machine room temperature detected by the machine room temperature detecting means 22 is within a predetermined temperature range. A machine room temperature determining means for determining whether or not the compressor is rotating; a compressor rotational speed detecting means for detecting the rotational speed of the compressor 6; and a compressor rotational speed determining means for determining the rotational speed detected by the compressor rotational speed detecting means. This is a number determination unit.

The present embodiment is different from the conventional example in that a machine room temperature sensor 21, a machine room temperature detecting means 22, and a machine room temperature judging means 23 are provided, and the compressor control means 19 responds to the machine room temperature. Thus, the operation of the compressor 6 is controlled including stopping.

The operation of the above configuration will be described. FIG. 2 is a flowchart showing the operation of this embodiment. The operations from step 100 to step 109 are the same as in the conventional example. Further, when the compressor blower 7 is rotating in accordance with the rotation command in step 109, the process proceeds to step 111 to operate the compressor 6 at normal rotation.

Next, if the compressor blower 7 is stopped in step 109, that is, if it is not rotating despite receiving the rotation command, the process proceeds to step 112 and the machine room temperature detecting means 22 The machine room temperature sensor 21 detects the machine room temperature in the machine room 5. Next, the routine proceeds to step 113, where the rotational speed of the compressor 6 is detected, and in step 114, it is determined whether the compressor 6 is in normal rotation, low speed rotation, or stopped. If it is determined in step 114 that the compressor 6 is rotating normally, the process proceeds to step 115, and the machine room temperature determining unit 23 determines whether the machine room temperature detected by the machine room temperature detecting unit 22 is equal to or higher than the machine room first temperature. Judge,
If the temperature is equal to or higher than the first temperature in the machine room, the process proceeds to step 110 and the compressor 6 is operated at a low speed by the compressor control means 19 and the compressor rotation means 20. Step 1
If the temperature of the machine room is lower than the first temperature of the machine room in step 15, the routine proceeds to step 111, where the compressor 6 is operated by the compressor rotating means 20 at normal rotation.

If the compressor 6 is rotating at a low speed or in a stopped state in step 114, the process proceeds to step 116,
The machine room temperature determining means 23 determines whether or not the machine room temperature detected by the machine room temperature detecting means 22 is equal to or higher than the machine room second temperature.
4 and the compressor 6 is stopped by the compressor rotating means 20. If the temperature is lower than the second temperature in the machine room, step 1 is executed.
The process proceeds to 10, where the compressor 6 is operated at low speed by the compressor rotating means 20.

As described above, according to the present embodiment, the blower rotation determining means 18 determines that the compressor blower 7 is not rotating due to a failure or disconnection of the wiring even after receiving the rotation command. When the machine room temperature is equal to or higher than the machine room first temperature, the compressor 6 is operated at a low speed rotation. When the machine room temperature is equal to or higher than the machine room second temperature during the operation at the low speed rotation, the compressor 6 is stopped. In addition, the operation of the compressor 6 can be controlled so that the heat radiation performance is not deteriorated until the winding is burned.

(Embodiment 2) Hereinafter, Embodiment 2 of the control device for a refrigerator according to the present invention will be described with reference to the drawings.
This embodiment relates to claim 2.

FIG. 3 is a block diagram showing the configuration of this embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted. In FIG. 3, reference numeral 26 denotes a compressor protection stop timer for counting the time during which the compressor 6 is stopped for protection.

This embodiment is different from the first embodiment in that a compressor protection stop timer 26 is provided, and the compressor control means 19 controls the temperature of the machine room when the compressor blower 7 is rotating at a low speed or in a stopped state. When the temperature is equal to or higher than two temperatures, the operation of the compressor 6 is stopped for a predetermined set time.

The operation of the above configuration will be described. FIG. 4 is a flowchart showing the operation of this embodiment. The operations from step 100 to step 116 are the same as in the first embodiment. In the determination at step 116,
If the machine room temperature is equal to or higher than the machine room second temperature, step 11
7 and the compressor 6 is stopped.
In step 119, the count of the compressor protection stop timer 26 is started. In step 119, the process waits for a predetermined set time to elapse. When the count of the predetermined set time is completed, the process returns to step 100.

As described above, according to the present embodiment, the blower rotation determining means 18 determines that the compressor blower 7 is not rotating due to a failure or disconnection of the wiring even after receiving the rotation command, and then, When the machine room temperature is equal to or higher than the machine room first temperature, the compressor 6 is operated at a low speed rotation. When the machine room temperature is equal to or higher than the machine room second temperature during the operation at the low speed rotation, the compressor 6 is set to a predetermined setting. Since the operation is stopped only for a certain period of time, the operation of the compressor 6 can be controlled so that the heat radiation performance is not deteriorated until the winding of the winding occurs.

(Embodiment 3) Hereinafter, Embodiment 3 of the control device for a refrigerator according to the present invention will be described with reference to the drawings.
This embodiment relates to claims 3 and 4.

The configuration of this embodiment is the same as that of FIG. The present embodiment is different from the first embodiment in that
Reference numeral 5 denotes a normal rotation, a first low-speed rotation lower by one stage than the normal rotation, and a second lower rotation by two stages than the normal rotation with respect to the rotation speed of the compressor 6.
The low-speed rotation and the stop state are determined, and the machine room temperature determining unit 23 determines the machine room temperature for the machine room first temperature, the machine room second temperature, and the machine room third temperature,
The compressor control means 19 is to control the compressor 6 to a normal rotation, a first low-speed rotation, a second low-speed rotation, or a stop in accordance with the respective rotation states of the compressor 6 and the respective predetermined temperatures. .

The operation of the above configuration will be described. FIG. 5 is a flowchart showing the operation of this embodiment. The operations from step 100 to step 114 are the same as in the first embodiment.

If it is determined in step 114 that the compressor 6 is rotating normally, the process proceeds to step 115, where the temperature of the machine room becomes
It is determined whether the temperature is equal to or higher than the temperature. If the temperature is lower than the first temperature in the machine room, the process proceeds to step 111 to rotate the compressor 6 normally.
The routine proceeds to 20, and the compressor 6 is operated at the first low-speed rotation one step lower than the normal rotation. If the compressor 6 is in the low-speed rotation or stopped state in step 114,
Then, the flow goes to step S21, and the rotational speed of the compressor 6 is determined again to determine whether the rotation is the first low-speed rotation or the second low-speed rotation or the stop state which is two steps lower than the normal rotation.

If the rotational speed of the compressor 6 is the first low-speed rotation at step 121, the routine proceeds to step 122, where the machine room temperature determining means 23 determines whether or not the machine room temperature is equal to or higher than the third machine room temperature. If the temperature is equal to or higher than the third temperature in the machine room, the process proceeds to step 123, and the compressor 6 is operated by the compressor rotating means 20 at the second low-speed rotation that is two steps lower than the normal rotation. If the temperature is lower than the third temperature in the machine room in step 122, the process proceeds to step 120 and
Thus, the compressor 6 is operated at the second low-speed rotation one step lower than the normal rotation.

If the rotational speed of the compressor 6 is in the second low-speed rotation or the stopped state in step 121, the process proceeds to step 124 and the machine room temperature judging means 23 sets the machine room temperature to the machine room second temperature. It is determined whether the temperature is equal to or higher than the above. If the temperature is equal to or higher than the second temperature in the machine room, the process proceeds to step 104 and the compressor is stopped by the compressor rotating means 20. Also,
If the machine room temperature is lower than the third machine room temperature in step 124, the process proceeds to step 123, and the compressor 6 is operated by the compressor rotating means 20 at the second low speed rotation.

As described above, according to the present embodiment, even if the compressor blower 7 receives the rotation command, the blower rotation determining means 18 determines that the compressor blower 7 is not rotating due to failure or disconnection of the wiring. When the machine room temperature is equal to or higher than the predetermined machine room first temperature, the compressor 6 is operated at the first low speed rotation one step lower than the normal rotation, and the machine room temperature is maintained at the predetermined machine room temperature while operating at the first low speed rotation. When the temperature is equal to or higher than the third temperature, the compressor 6 is operated at the second low-speed rotation one step lower than the third temperature. , The compressor 6 is rotated at a low speed in a stepwise manner while monitoring the temperature of the machine room in detail, and the operation of the compressor 6 is controlled so that the heat radiation performance is not deteriorated until the winding of the windings occurs. can do.

Embodiment 4 Hereinafter, a refrigerator control apparatus according to Embodiment 4 of the present invention will be described with reference to the drawings.
This embodiment relates to claims 2 to 4.

The configuration of this embodiment is the same as that of FIG. The present embodiment is different from the second embodiment in that the low-speed operation is the stepwise low-speed operation described in the third embodiment. The stop when the temperature is equal to or higher than the second temperature in the machine room is to be a stop for a predetermined set time.

The operation of the above configuration will be described. FIG. 6 is a flowchart showing the operation of this embodiment. The operations from step 100 to step 114 are the same as those in the second embodiment, and the operations from step 100 to step 124 are the same as those in the third embodiment. At step 114, it is determined whether the compressor 6 is rotating normally or at a low speed or stopped. If the compressor 6 is rotating normally, the process proceeds to step 115, and the temperature of the machine room is reduced to the same value as in the second embodiment. If the temperature is lower than 1 temperature, the process proceeds to step 111 to rotate the compressor 6 normally. If the temperature of the machine room is equal to or higher than the first temperature of the machine room, the process proceeds to step 120 to rotate the compressor 6 by 1 from the normal rotation. Operate at the first low-speed rotation that is lower by a step.

If it is determined in step 114 that the compressor 6 is rotating at a low speed or is in a stopped state, the process proceeds to step 121, where the rotational speed of the compressor 6 is determined again. If the compressor 6 is at the first low-speed rotation one step lower than the normal rotation, the routine proceeds to step 122, where it is determined whether or not the machine room temperature is equal to or higher than the machine room third temperature. If the temperature is low, the process proceeds to step 120 to operate the compressor 6 at the first low-speed rotation. If the temperature is equal to or higher than the third temperature in the machine room, the process proceeds to step 123 to lower the compressor 6 by two stages from the normal rotation. Operate at the second low speed rotation. If the compressor 6 is in the second low-speed rotation or stopped state in step 121, the process proceeds to step 124 to determine whether or not the machine room temperature is equal to or higher than the machine room second temperature. If the temperature is lower than the second temperature, the process proceeds to step 123 to operate the compressor 6 at the second low-speed rotation. If the temperature is equal to or higher than the second temperature in the machine room, the process proceeds to step 125 to stop the compressor 6, Subsequently, in step 126, the count of the compressor protection stop timer 26 is started. In step 127, after elapse of a predetermined set time, the flow returns to step 100.

As described above, according to the present embodiment, even if the compressor blower 7 receives the rotation command, the blower rotation determining means 18 determines that the compressor blower 7 is not rotating due to failure or disconnection of the wiring. When the machine room temperature is equal to or higher than the predetermined machine room first temperature, the compressor 6 is operated at the first low speed rotation one step lower than the normal rotation, and the machine room temperature is maintained at the predetermined machine room temperature while operating at the first low speed rotation. If the temperature is equal to or higher than the third temperature, the compressor 6 is operated at the second low-speed rotation one step lower than the third temperature. Since the compressor 6 is stopped only for a certain time, the rotation of the compressor 6 is gradually rotated at a low speed while monitoring the temperature of the machine room in detail, so that the heat radiation performance is not deteriorated until the winding of the winding occurs. The operation of the machine 6 can be controlled.

(Embodiment 5) Hereinafter, a refrigerator control apparatus according to a fifth embodiment of the present invention will be described with reference to the drawings.
This embodiment relates to claim 5.

The configuration of this embodiment is the same as that of FIG. This embodiment is different from the first embodiment in that not only the machine room temperature but also the internal temperature is reflected in the operation of the compressor.

The operation of the above configuration will be described. FIG. 7 is a flowchart showing the operation of this embodiment. The operations from step 100 to step 112 are the same as in the first embodiment. After the temperature of the machine room is detected by the machine room temperature detecting means 22 at step 112, the internal temperature is detected by the internal temperature detecting means 10 at step 128, and the routine proceeds to step 113, at which the compressor rotational speed detecting means 2 is operated.
4, the number of revolutions of the compressor 6 is detected, and in step 114, the compressor revolution number judging means 25 judges whether the compressor 6 is rotating normally or at low speed or stopped.

If the compressor 6 is rotating normally, the routine proceeds to step 115, where it is determined whether or not the machine room temperature is equal to or higher than the machine room first temperature. And the compressor 6 is rotated normally,
If the temperature is equal to or higher than the first temperature in the machine room, the process proceeds to step 129, and the internal temperature determining means 12 determines whether the internal temperature is equal to or lower than the internal first temperature. If the temperature in the refrigerator is higher than the first temperature in the refrigerator in step 129, the process proceeds to step 111, in which the compressor 6 is operated at normal rotation by the compressor rotating means 20, and the temperature in the refrigerator is equal to or lower than the first temperature in the refrigerator. If it is, the routine proceeds to step 110, where the compressor 6 is rotated at a low speed.

If the compressor 6 is in the low-speed rotation or stopped state in step 114, the process proceeds to step 116, where it is determined whether or not the machine room temperature is equal to or higher than the machine room second temperature. If the temperature is lower than the second temperature, the process proceeds to step 110 to rotate the compressor 6 at a low speed. If the temperature is equal to or higher than the second temperature in the machine room, the process proceeds to step 130 to determine whether the internal temperature is equal to or lower than the internal second temperature. If the temperature is higher than the second temperature in the refrigerator, the process proceeds to step 110 and the compressor 6 is rotated at a low speed. Stop.

As described above, according to the present embodiment, even if the compressor blower 7 receives the rotation command, the blower rotation determination means 18 determines that the compressor blower 7 is not rotating due to failure or disconnection of the wiring. Detecting the machine room temperature and the inside temperature of the refrigerator, and when the machine room temperature is equal to or higher than the predetermined machine room first temperature and the internal temperature is equal to or lower than the predetermined first room temperature, the compressor 6 is operated at low speed. ,
During operation at the low-speed rotation, the machine room temperature becomes a predetermined machine room second.
When the internal temperature is equal to or higher than the temperature and the internal temperature is equal to or lower than the predetermined internal second temperature, the compressor 6 is stopped, and the operation corresponding to the machine room temperature and the internal temperature causes the heat to be radiated until the winding is burned. The operation can be controlled so as to reduce the load on the compressor without deteriorating the performance and to prevent the temperature inside the refrigerator from rising.

It goes without saying that the operation of the present embodiment may be combined with the structure of the second embodiment.

[0058]

According to the first aspect of the present invention, when the blower rotation detecting means detects that the blower for the compressor has stopped after receiving the rotation command, the temperature of the machine room is reduced to a predetermined value in the first machine room. If the temperature is equal to or higher than the temperature, the compressor is operated at a low speed rotation, and if the machine room temperature is equal to or higher than a predetermined machine room second temperature during operation at the low speed rotation, the compressor is controlled to be stopped. By using a refrigerator control device,
When the compressor blower is not rotating after receiving the rotation command, the compressor is rotated at a low speed or stopped according to the temperature of the machine room, so that the heat radiation performance is not deteriorated until the winding of the coil occurs. The operation can be controlled quickly, and the rise in the temperature of the machine room can be reduced.

According to a second aspect of the present invention, when the blower rotation detecting means detects that the blower for the compressor has stopped after receiving the rotation command, the temperature of the machine room is equal to or higher than a predetermined first temperature in the machine room. In the case of, the compressor is operated at a low speed rotation, and when the machine room temperature is equal to or higher than a predetermined machine room second temperature during operation at the low speed rotation, the compressor is stopped for a predetermined set time. By controlling the refrigerator control device according to claim 1, when the compressor blower is not rotating after receiving the rotation command, the compressor is rotated at a low speed in accordance with the temperature of the machine room, or at a predetermined speed. Since the operation is stopped only for the set time, the operation can be controlled so that the heat radiation performance is not deteriorated until the winding is seized, and the rise in the temperature of the machine room can be reduced.

According to a third aspect of the present invention, there is provided a refrigerator control apparatus according to any one of the first and second aspects, wherein the low-speed rotation is a first low-speed rotation one step lower than the normal rotation. When the blower for the machine is not rotating after receiving the rotation command, the compressor is rotated at a low speed one step lower than the normal rotation or stopped in accordance with the temperature of the machine room, so heat is released until the winding is burned. The operation can be controlled so as not to deteriorate the performance, and the rise in the temperature of the machine room can be reduced.

According to a fourth aspect of the present invention, when the blower rotation detecting means detects that the blower for the compressor is stopped after receiving the rotation command, the temperature of the machine room is equal to or higher than a predetermined first temperature in the machine room. In the case of, the compressor is operated at a first low-speed rotation one step lower than the normal rotation, and when the machine room temperature is equal to or higher than a predetermined machine room third temperature during operation at the first low-speed rotation, the compressor is operated. Driving at the second low-speed rotation one step lower,
The refrigerator according to claim 1, wherein the compressor is controlled to stop when the machine room temperature is equal to or higher than a predetermined machine room second temperature during operation at the second low-speed rotation. By using the control device, when the compressor blower is not rotating after receiving the rotation command, the compressor is gradually rotated at a low speed or stopped according to the temperature of the machine room, so that the winding is burned. The operation can be controlled so that the heat radiation performance is not deteriorated before the occurrence of the problem, and the temperature rise in the machine room can be reduced.

According to a fifth aspect of the present invention, when the blower rotation detecting means detects that the blower for the compressor has stopped after receiving the rotation command, the machine room temperature is equal to or higher than a predetermined machine room first temperature. When the internal temperature of the compressor is equal to or lower than the predetermined first internal temperature, the compressor is operated at a low rotation speed, and the machine room temperature is equal to or higher than the predetermined second mechanical room temperature during the operation at the low speed. When the internal temperature of the refrigerator is equal to or lower than a predetermined second internal temperature, the compressor is controlled so as to be stopped, so that the compressor blower receives a rotation command by the compressor blower. When the compressor is not rotating later, the compressor is gradually rotated or stopped at low speeds in accordance with the machine room temperature and the internal temperature, so that the heat radiation performance is not deteriorated until the winding is seized. Control and reduce machine room temperature rise. It is possible.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the embodiment.

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

FIG. 4 is a flowchart showing the operation of the embodiment.

FIG. 5 is a flowchart showing the operation of a refrigerator control device according to a third embodiment of the present invention;

FIG. 6 is a flowchart showing the operation of a refrigerator control device according to a fourth embodiment of the present invention.

FIG. 7 is a flowchart showing the operation of the fifth embodiment of the control device of the refrigerator according to the present invention;

FIG. 8 is a block diagram showing a configuration of a conventional refrigerator control device.

FIG. 9 is a flowchart showing the operation of the conventional example.

[Description of Signs] 1 Refrigerator body 2 Partition wall 3 Freezer room 4 Refrigerator room 5 Machine room 6 Compressor 7 Compressor blower 8 Inside temperature sensor 9 Outside temperature sensor 10 Inside temperature detecting means 11 Outside temperature detecting means 12 Internal temperature determination means 13 Outside air temperature determination means 14 Compressor drive means 15 Compressor blower control means 16 Compressor blower drive means 17 Blower rotation detection means 18 Blower rotation determination means 19 Compressor control means 20 Compressor rotation means 21 Machine Room temperature sensor 22 Machine room temperature detecting means 23 Machine room temperature determining means 24 Compressor rotational speed detecting means 25 Compressor rotational speed determining means 26 Compressor protection stop timer

Claims (5)

[Claims] 1. An internal temperature detecting means for detecting an internal temperature, an external air temperature detecting means for detecting an external air temperature, and a machine room accommodating a compressor, wherein the internal temperature and the external air temperature are determined. A blower for a compressor that receives a corresponding rotation command and forcibly cools the compressor, a blower rotation detecting unit that detects a rotation state of the blower for the compressor, and a machine room temperature sensor provided in the machine room. Machine room temperature detecting means for detecting a machine room temperature by the machine room temperature sensor, machine room temperature determining means for determining whether the machine room temperature is equal to or higher than a predetermined temperature, and a rotational speed of the compressor , Compressor rotation speed determination means for determining the rotation speed of the compressor, compressor rotation speed for varying the rotation speed of the compressor, and compression for driving the compressor. Means for driving the compressor, Compressor control means for controlling the rotation, the compressor control means, when the blower rotation detection means detects that the compressor blower has stopped after receiving the rotation command, the machine When the room temperature is equal to or higher than a predetermined machine room first temperature, the compressor is operated at a low speed rotation, and when the machine room temperature is equal to or higher than a predetermined machine room second temperature during the operation at the low speed rotation, A refrigerator control device for controlling the compressor to stop. 2. A compressor protection stop timer for counting a time during which the compressor is stopped for protection, wherein the compressor control means detects that the compressor blower has stopped after receiving a rotation command. When the machine room temperature is equal to or higher than a predetermined machine room first temperature, the compressor is operated at low speed rotation, and when the machine room temperature is equal to or higher than a predetermined machine room second temperature during operation at the low speed rotation. 2. The control device for a refrigerator according to claim 1, wherein the controller controls the compressor to stop for a predetermined set time. 3. The refrigerator control device according to claim 1, wherein the low-speed rotation is a first low-speed rotation one step lower than the normal rotation. 4. When the compressor control means detects that the blower for the compressor has stopped after receiving the rotation command, the compressor control means determines whether or not the compressor room temperature is equal to or higher than a predetermined first mechanical chamber temperature. Is operated at a first low-speed rotation one step lower than the normal rotation,
When the machine room temperature is equal to or higher than the predetermined machine room third temperature during the operation at the first low speed rotation, the compressor is operated at the second low speed rotation one step lower, and the compressor is operated at the second low speed rotation. The control device for a refrigerator according to claim 1, wherein the controller controls the compressor to stop when the temperature of the machine room is equal to or higher than a predetermined second temperature of the machine room. 5. An internal temperature judging means for judging whether or not the internal temperature detected by the internal temperature detecting means is equal to or higher than a predetermined temperature. When it is detected that the compressor has stopped after receiving the command, if the machine room temperature is equal to or higher than the predetermined machine room first temperature and the internal temperature is equal to or lower than the predetermined internal first temperature, the rotational speed of the compressor is reduced. When the machine room temperature is equal to or higher than the predetermined machine room second temperature while the machine room temperature is equal to or higher than the predetermined machine room second temperature during the low speed rotation,
The control device for a refrigerator according to claim 1, wherein the control is performed so as to stop the compressor when the temperature is equal to or lower than the temperature.