JP2001074354A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a rotational speed of a fan and to prevent a consumption of a wasteful energy by providing a fan drive-deciding unit for driving the fan when a fan control deviation calculated by a fan control deviation calculator is larger than a predetermined value and stopping the fan when the deviation is smaller than the value. SOLUTION: Whether or not a temperature of a cooler (R evaporator) 10 for a cold storage chamber (R chamber) 4 is lower than (an air temperature of the chamber 4+α (e.g. α =-2 deg.C)) is decided by a cold storage chamber cooler temperature deviation calculating means. If the temperature of the cooler is lower than the given temperature, a blower (R fan) 11 for cooling the chamber is operated. The R fan 11 is stopped until the temperature of the R evaporator 10 is further cooled by 2 deg.C from the air temperature of the chamber 4, and hence even if a compressor 17 is operated at a highly rotational speed, the R fan 11 does not start operating. That is, if an R fan control deviation of a difference between an R indoor temperature of the chamber 4 calculated by the means and a detected temperature of the R evaporator 10 is larger than the α, the R fan 11 is operated, or if the deviation is smaller than the α, the fan 11 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a refrigeration cycle in which refrigerant discharged from a compressor passes through a condenser and a cooler and returns to the compressor again, and circulates air cooled by the cooler by a fan. The present invention relates to a refrigerator for cooling by cooling.

[0002]

2. Description of the Related Art In a conventional refrigerator, a fan is operated in synchronization with the operation of a compressor to blow air cooled by a cooler. Further, the fan speed was determined in proportion to the capacity of the compressor and the outside air temperature.

[0003]

However, in the prior art, since the number of revolutions of the fan is determined by the capacity of the compressor and the outside air temperature, the operation is performed even if the temperature of the cooler is higher than the temperature in the refrigerator. In addition to power saving, there is a problem that warm air is blown into the refrigerator to heat food.

[0004] In view of the above problems, the present invention determines the number of revolutions of the fan based on the internal temperature, the set temperature, and the cooler temperature, thereby preventing wasteful energy consumption and preventing a reduction in freshness of food. Is to provide a refrigerator.

[0005]

According to the first aspect of the present invention, there is provided a compressor for compressing a refrigerant, a condenser for condensing the refrigerant from the compressor, a cooler for cooling a cooling chamber, and a cooler. And a fan that blows the air cooled in the cooling chamber. In a refrigerator having a refrigeration cycle equipped with, an air temperature detection unit that detects the air temperature of the cooling room, a cooler temperature detection unit that detects the evaporating temperature of the cooler, and an air temperature that is detected by the air temperature detection unit, A fan control deviation calculation unit that calculates a difference between the cooler temperature detected by the cooler temperature detection unit as a fan control deviation, and a fan when the fan control deviation calculated by the fan control deviation calculation unit is larger than a predetermined value. And a fan operation determining unit that stops the fan if the size is small.

According to a second aspect of the present invention, a hysteresis having a predetermined temperature range with respect to the air temperature detected by the air temperature detecting section is provided, and the air temperature information provided with the hysteresis is supplied to the fan control deviation calculating section. An air temperature hysteresis adding section and a hysteresis having a predetermined temperature range with respect to the cooler temperature detected by the cooler temperature detecting section are provided, and the cooler temperature information provided with the hysteresis is supplied to the fan control deviation calculating section. The refrigerator according to claim 1, further comprising a cooler temperature hysteresis adding section.

According to a third aspect of the present invention, a hysteresis having a predetermined temperature width is provided for the fan control deviation detected by the fan control deviation calculation unit, and the fan control deviation information provided with the hysteresis is sent to the fan operation determination unit. 2. The refrigerator according to claim 1, further comprising a fan control deviation hysteresis adding unit for supplying the fan control deviation.

According to a fourth aspect of the present invention, the smaller the fan control deviation calculated by the fan control deviation calculator, the smaller the maximum rotational speed of the fan is, and the more the fan control deviation is smaller than a predetermined value. The refrigerator according to any one of claims 1 to 3, further comprising a fan maximum rotation speed limiter that stops the operation of the refrigerator.

According to a fifth aspect of the present invention, there is provided an air temperature deviation calculating section for calculating a difference between an air temperature of a cooling chamber and a set air temperature of the cooling chamber as an air temperature deviation, and an air temperature deviation calculated by the air temperature deviation calculating section. The refrigerator according to any one of claims 1 to 4, further comprising: a fan rotation speed determination unit that gradually reduces the rotation speed of the fan as the value of the refrigerator becomes smaller.

According to a sixth aspect of the present invention, in a refrigerator having a plurality of cooling chambers, a plurality of coolers are provided for cooling each of the cooling chambers, and a fan also cools the air cooled by each of the coolers. Exists for each cooler to blow air into the room,
The refrigerator according to any one of claims 1 to 5, further comprising a refrigerant supply device that supplies the refrigerant from the condenser to the plurality of coolers.

According to a seventh aspect of the present invention, in the refrigerator having a refrigerator compartment and a freezer compartment in the refrigerator compartment, the refrigerant supply device supplies the refrigerant from the condenser to the refrigerator compartment with priority. A refrigerator as described.

According to another aspect of the present invention, there is provided a compressor control deviation calculating section for calculating a difference between a cooling chamber air temperature and a cooling chamber set air temperature as a compressor control deviation, and a compressor calculated by the compressor control deviation calculating section. A compression function calculating section for calculating a cooling capacity required for the compressor based on the control deviation; and, if the cooling capacity calculated by the compression function calculating section is larger than a predetermined value, the compressor is operated; The compressor according to claim 1, further comprising: a compressor operation determination unit that stops when the pressure is smaller than a predetermined value.

According to a ninth aspect of the present invention, the compressor control deviation calculated by the compressor control deviation calculation section is provided with a hysteresis having a predetermined temperature range, and the compressor control deviation information provided with the hysteresis is compressed. 9. The refrigerator according to claim 8, further comprising a compressor control deviation hysteresis adding unit to be supplied to the force calculation unit.

According to the refrigerator of the first aspect of the present invention, the number of rotations of the fan is controlled by the temperature in the refrigerator and the temperature in the cooler, so that unnecessary energy is not consumed.

According to the refrigerator of the present invention, an appropriate hysteresis is provided for the detected various temperatures, so that a rapid fluctuation of the fan can be suppressed.

In the refrigerator according to the third aspect, an appropriate hysteresis is provided for the fan control deviation so that a rapid fluctuation of the fan can be suppressed.

According to the refrigerator of the fourth aspect, the compressor operates, the refrigerant is supplied to the cooler, and it is confirmed that the cooler has cooled. Never consume.

In the refrigerator according to the fifth aspect, the compressor operates, the refrigerant is supplied to the cooler, and it is confirmed that the cooler has cooled. Never consume.

According to the refrigerator of the present invention, the rotation speeds of the refrigerating compartment and the freezing compartment can be determined independently of the operation of the compressor and the refrigerant supply device, and the control can be simplified.

According to the refrigerator of the present invention, the refrigerator is preferentially controlled so as to be cooled between the cooling start temperature and the cooling end temperature, so that freezing due to excessive cooling of the refrigerator can be prevented. it can.

According to the refrigerator of the present invention, since the compressor is operated / stopped by the cooling capacity required for the refrigerator compartment and the freezer compartment, the correction in the negative direction can be sufficiently performed.

According to the refrigerator of the ninth aspect, an appropriate hysteresis is provided for the detected various temperatures, so that a sudden change in the compressor can be suppressed.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS.

1. First, a schematic configuration of a refrigerator main body 1 and a refrigerating cycle 2 is shown in FIG.

The refrigerator body 1 is constituted by a heat-insulating casing, and the interior thereof is divided into an upper refrigerator compartment (hereinafter referred to as R room) 4 and a lower freezer compartment (hereinafter referred to as F room) 5 by a heat insulating partition wall 3. It is divided into. Inside the R chamber 4, a duct 7 is formed by a partition plate 6 at the back, and a vegetable room 9 is formed by a partition plate 8 at a lower portion.

A cooler for a refrigerator (hereinafter referred to as R-eva) 10 of the refrigeration cycle 2 is provided in a lower part of the duct 7, and a blow-out port 6 a is formed in an upper part of the partition plate 6. A blower for cooling a refrigerator (hereinafter, referred to as an R fan) 11 is provided at the outlet 6a. A suction port 6b for communicating the duct 7 with the vegetable room 9 is formed below the partition plate 6, and a communication port 8a for communicating the R room 4 and the vegetable room 9 is formed in the partition plate 8. ing.

In the interior of the room F,
A duct 13 is formed by the partition plate 12, and a cooler for a freezing room (hereinafter, referred to as F eva) 14 of the refrigeration cycle 2 is provided in a lower portion of the duct 13. Also,
An outlet 12a is formed in the upper part of the partition plate 12, and a freezer cooling fan (hereinafter, referred to as an F fan) 15 is disposed in the outlet 12a. In addition, a suction port 12 b that communicates the duct 13 with the F chamber 5 is formed below the partition plate 12.

In the lower part of the refrigerator body 1, a machine room 1 is provided.
6, a compressor 17 of the refrigeration cycle 2 is disposed behind the machine room 16.

2. Configuration of Refrigeration Cycle The refrigeration cycle 2 includes a condenser 18, a refrigerant supply device 19 including a three-way valve, and capillary tubes 20, 21 in addition to the R-eva 10, the F-eva 14, and the compressor 17.

In this case, the outlet of the compressor 17 is connected via the condenser 18 and one outlet of the refrigerant supply device 19 is connected via the capillary tube 20, the Reva 10, the connecting pipe 22 and the Feva 14 to the compressor. It communicates with 17 inlets.

The other outlet of the refrigerant supply device 19 is connected to a connecting pipe 22 through a capillary tube 21.
Is communicated with the middle part of.

3. Description of Control Part FIG. 2 shows a schematic block diagram of the present embodiment.

The compressor 17 is started to operate by the compressor control means 25 for controlling the operation of the compressor 17 according to conditions such as the internal temperature.

The compressed refrigerant is supplied to the R-eva 10 or the F-eva 14 via a refrigerant supply device 19.

When the refrigerant is supplied to the coolers 10 and 14,
The temperature of the cooler gradually started to decrease,
The fans 11, 15 start operating from the cooler temperature.

First, control of the R room 4 will be described.

The refrigerating room setting air temperature input means 30 sets the inside temperature of the R room 4.

The refrigerating compartment air temperature detecting means 31 detects the temperature in the R compartment of the R compartment 4.

The refrigerator compartment cooler temperature detecting means 32 detects the temperature of the R-eva 10.

The refrigerating room air temperature deviation calculating means 33 calculates the deviation between the set temperature of the R room 4 and the actual R refrigerator temperature.

The refrigerating compartment cooler temperature deviation calculating means 34 calculates R
An R fan control deviation, which is a difference between the temperature in the R chamber of the room 4 and the detected temperature of the R evaporator 10, is calculated, and the calculation result is input to the refrigerator operation determining means 35 for the refrigerator, and the R fan control deviation is calculated. Control of operation / stop of the R fan 11 is performed accordingly. This will be described later.

Next, control of the F chamber 5 will be described.

The freezer compartment set air temperature input means 40 sets the temperature in the F compartment of the F compartment 5.

The freezing room air temperature detecting means 41 detects the temperature in the F chamber of the F chamber 5.

The freezer compartment cooler temperature detecting means 42 detects the temperature of the fuel cell 14.

The freezing room air temperature deviation calculating means 43 calculates a deviation between the set temperature of the F chamber 5 and the actual F compartment temperature.

The freezer compartment cooler temperature deviation calculating means 44 calculates F
An F-fan control deviation, which is a difference between the temperature in the F-compartment of the chamber 5 and the detected temperature of the F-eva 14, is calculated, and the calculation result is input to the freezing-room fan operation determining means 45. Control of operation / stop of the freezer compartment fan 15 is performed accordingly. This will be described later.

Next, the control will be described in detail.

This control is always performed not only at the time of the initial start of the refrigerator but also at a constant cycle (for example, every one minute).

The temperature of the R evaporator 10 is equal to the air temperature of the R chamber 4 +
Whether or not the temperature is lower than α (for example, α = −2 ° C.) is determined by the refrigerator compartment cooler temperature deviation calculating means 34, and if it is lower, the R fan 11 is operated. Further, the R fan 11 is stopped until the temperature of the R evaporator 10 further cools down by 2 ° C. from the air temperature of the R chamber 4, and no matter how much the compressor 17 operates at a high speed,
The R fan 11 does not start operation.

That is, if the R fan control deviation, which is the difference between the R-chamber internal temperature of the R chamber 4 and the detected temperature of the R-eva 10 calculated by the refrigerator compartment cooler temperature deviation calculating means 34, is larger than α, The R fan 11 is operated, and if it is smaller, it is stopped.

As described above, in the present embodiment, the rotation speed of the R fan 11 is not directly determined from the compressor 17, the compressor 17 is operated, the refrigerant is supplied to the R evaporator 10, and the R evaporator 10 is cooled. The operation is started after confirming that no unnecessary energy is consumed.

Since the control of the operation / stop of the F fan 15 is the same as the control of the R fan 11 described above, the description thereof will be omitted.

(Second Embodiment) Next, a second embodiment will be described.

FIG. 3 is a schematic block diagram of the present embodiment.

In the refrigerator of the previous embodiment, the output of the refrigerated air temperature detecting means 31 and the output of the refrigerated room cooler temperature detecting partition plate 32 are added to the refrigerated room air temperature hysteresis adding means 3 respectively.
6 and the refrigerator compartment cooler temperature hysteresis adding means 37, and the outputs of the freezer compartment air temperature detecting means 41 and the freezing compartment cooler temperature detecting means 42 are connected to the freezing compartment air temperature hysteresis adding means 46 and the freezing compartment cooler, respectively. The other configuration is the same as that of the previous embodiment, except that the temperature hysteresis adding means 47 is connected.

FIG. 4 shows the hysteresis adding means 36 and 37.
And FIG. 47 is an explanatory diagram in which hysteresis is provided in 46 and 47.

A predetermined temperature range (for example, 1 ° C.) is set as the hysteresis width, and when the detected temperature is within this range, the control is performed by providing a hysteresis. Can be suppressed.

(Third Embodiment) Next, a third embodiment will be described.

FIG. 5 shows a block diagram of this embodiment.

In the block diagram of FIG. 2, the outputs of the refrigerator compartment air temperature deviation calculating means 33 and the refrigerator compartment cooler temperature deviation calculating means 34 are respectively added to the refrigerator compartment air temperature deviation hysteresis adding means 38 and the refrigerator compartment cooler temperature deviation. The only difference is that the hysteresis adding means 39 is connected. Further, the output of the freezing compartment air temperature deviation calculating means 43 and the freezing compartment cooler temperature deviation calculating means 44 is connected to the freezing compartment air temperature deviation hysteresis adding means 48 and the freezing compartment cooler temperature deviation hysteresis adding means 49, respectively. Only different
Other configurations and operations are the same as those of the first embodiment.

Specifically, before and after the operation of the refrigerant supply device (cooling switching valve device) 19, the characteristics of the controlled object may greatly change depending on the magnitude of the cooling load applied to the refrigerator cabinet or the cooling chamber. In such a case, the fan control deviation value input to the fan operation determining means 35 and 45 may fluctuate greatly, and as a result, the rotation speed may become unstable.

Accordingly, as shown in FIGS. 3 to 5, an appropriate hysteresis is provided for the detected temperature so that a rapid change can be suppressed. This is the same as providing a dead zone in the fan rotation speed, and it is possible to stabilize the operation amount.

(Fourth Embodiment) Next, a fourth embodiment will be described.

In the fourth embodiment, a means for determining the number of revolutions of the fan in a stepwise manner in the refrigerator of the first embodiment is added to provide more detailed control.

Control for determining the fan speed will be described with reference to the flowchart shown in FIG.

The flowchart shown in FIG. 6 is started at a constant period (for example, at one-minute intervals).

First, the refrigerator compartment temperature (TRa) and the refrigerator compartment set temperature
From (TRs), the set rotation speed of the R fan 11 is obtained. In this example, three stages are prepared at 2 ° C / 4 ° C.

First, in step S1, the refrigerator compartment temperature (TRa) is compared with the refrigerator compartment set temperature (TRs). If the refrigerator compartment temperature (TRa) is higher than 4 ° C., the process proceeds to step S2. R
The set rotation speed of the fan 11 is increased. Further, in step S1, the refrigerator compartment temperature (TRa) is set at a value which is two more than the refrigerator compartment set temperature (TRs).
If the temperature is higher than ° C, the process proceeds to step S4 to set the fan speed to medium speed, and if the temperature is lower than 2 ° C, the process proceeds to step S5 to set the fan speed to low speed.

In this example, three steps are prepared at a boundary of 2 ° C./4° C., but a function may be prepared and determined as follows.

FRset = f (TRa, TRs) Next, control for obtaining the maximum number of revolutions of the R fan 11 from the refrigerator compartment air temperature and the refrigerator compartment cooler temperature will be described.

In this example, four stages in which a stop is added at 5 ° C./10° C./15° C. are prepared.

At step S6, the refrigerator air temperature TR
If a is 15 ° C. or more higher than the refrigerator temperature TRe, the process proceeds to step S7, where the maximum number of rotations of the refrigerator fan FRma
x, and if the temperature difference is 10 ° C. or more in step S8, the process proceeds to step S9 to set the fan rotation speed to medium speed, and if the temperature difference is 5 ° C. in step S10, the fan rotation speed is changed to x. If the temperature is low and the temperature difference is 5 ° C. or less, the R fan 11 is stopped in step S12.

The function may be prepared and determined as follows.

FRmax = f (TRa, TRe) Finally, the rotation speed of the R fan 11 obtained previously is limited to the maximum rotation speed to make it an actual rotation speed, and the rotation speed is commanded to the R fan 11 (step S13). To Step S15).

In this embodiment, the maximum fan speed is stopped until the cooler temperature further cools by 5 ° C. from the air temperature, and the fan 11 does not start operating even if the compressor 17 operates at a high speed. . Since the compressor 17 is operated and the refrigerant is supplied to the cooler 10, and it is confirmed that the cooler 10 has cooled down, the compressor 17 is operated at a rotational speed appropriate for each, so that no wasteful energy is consumed. .

The control of the F fan 15 is the same as that of the control of the R fan 11, so that the description thereof will be omitted.

(Fifth Embodiment) Next, a fifth embodiment will be described.

Further, regardless of the operation contents of the compressor 17 and the refrigerant supply device 19, the R fans 11 and F of the R chamber 4 and the F chamber 5
The operation / stop and rotation speed of the fan 15 can be determined independently.

For example, in the refrigeration refrigeration series cycle, when the cooling capacity is excessive during the cooling of the R chamber 4 and the non-vaporized refrigerant is supplied to the F-eva 14, the surplus refrigerant is used.
The F chamber 5 can be cooled.

Normally, control is performed using a variable capacity compressor so that the cooling efficiency is not excessive. However, in low-cost equipment, control can be simplified by using a constant capacity compressor.

(Sixth Embodiment) Next, a sixth embodiment will be described.

FIG. 7 shows a conventional example, and FIG. 8 shows a change in air temperature when the R chamber 4 and the F chamber 5 are alternately cooled when a load is applied in the refrigerator of this embodiment.

Conventionally, priorities were not given to the R room 4 and the F room 5, and when a load is applied to the F room 5,
In addition, the air temperature rose to the R room 4.

In this embodiment, by giving priority to the R room 4,
The purpose is to stabilize the air temperature in the R chamber 4.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

In FIG. 7 and FIG. 8, TRon is the cooling room cooling start temperature, TRoff is the refrigerator room cooling end temperature, TFon is the freezing room cooling start temperature, and TFoff is the freezing room cooling end temperature. It is.

More specifically, a fixed period (for example, 1
The following control is performed at minute intervals).

First, as shown in step S21 of FIG. 8, it is checked whether the current cooling state is cooling the refrigerator compartment or cooling the freezer compartment. If the refrigerator compartment is being cooled, the process proceeds to step S22. If the refrigerator compartment air temperature TRa is equal to or lower than the refrigerator compartment end temperature TRoff, the process proceeds to step S28 to forcibly switch the valve (refrigerant supply device 19) to the freezer compartment cooling.

If it is determined in step S22 that the refrigerator compartment air temperature TRa is equal to or higher than the refrigerator compartment cooling end temperature TRoff,
The process proceeds to step S23, where the refrigerator air temperature deviation eR (refrigerator room set temperature-refrigerator air temperature) is calculated as the freezer air temperature deviation.
If it is smaller than eF (freezer compartment set temperature-freezer compartment air temperature), the valve is switched to freezer compartment cooling in step S28.

If the freezer compartment is being cooled in step S21,
In step S24, if the refrigerator compartment air temperature TRa is lower than the refrigerator compartment cooling start temperature TRon, the valve switching is restricted (the valve switching control is not performed).

In step S24, when the refrigerator compartment air temperature TRa is higher than the refrigerator compartment cooling start temperature TRon, the freezer compartment air temperature TFa is lower than the freezer compartment cooling end temperature TFoff and the refrigerator compartment air temperature TRa becomes the refrigerator compartment cooling start temperature TRon. If this is the case (see steps S25 and S27), the process moves to step S29 and switches the valve to refrigerator compartment cooling.

Next, at step S25, the freezer compartment air temperature
If TFa is higher than the freezing compartment cooling end temperature TFoff, the process proceeds to step S26, where the freezing compartment air temperature deviation eF (freezing compartment set temperature-freezing compartment air temperature) is equal to the refrigerator compartment air temperature deviation eR.
If it is smaller than (refrigerator room set temperature-refrigerator room air temperature),
In step S29, the valve is switched to the refrigerator compartment cooling.

In other words, the R chamber 4 is preferentially controlled so as to be cooled between the cooling start temperature and the cooling end temperature.

This is because the R chamber 4 is controlled in a temperature zone around 0 ° C., and may freeze if it is cooled too much. When there is a change in the cooling load of the R room 4 or the F room 5, it becomes possible by absorbing the fluctuation with the cooling capacity of the freezing room temperature.

(Seventh Embodiment) Next, a seventh embodiment will be described.

FIG. 9 is a block diagram showing the configuration of a refrigerator-freezer according to the seventh embodiment.

In the sixth embodiment, when the cooling capacity is excessive, the freezing compartment is cooled to limit the excessive cooling of the refrigerating compartment.

Further, if both the R chamber 4 and the F chamber 5 can be sufficiently cooled, the compressor 17 may be stopped to terminate the cooling. Conventionally, there has been a method in which a cooling end temperature is prepared in the R chamber and the F chamber in advance, and the compressor is stopped when both temperatures fall below that temperature.

In this system, there is a temperature range more positive than the target temperature when the door is opened and closed or food is charged, but the negative temperature range hardly occurs because the compressor is stopped. In a control system such as PID control that calculates a capacity (operating rate) from a deviation from a target temperature, there is a problem that the reaction easily reacts in the direction of increasing the capacity but becomes slow in the direction of decreasing.

The actual PID calculation formula is shown below.

Refrigerator compartment temperature deviation: eR (t) = Refrigerator compartment air temperature: TRair (t) -Refrigerator compartment set temperature:
TRset (t) Freezer compartment temperature deviation: eF (t) = Freezer compartment air temperature: TFair (t)-Freezer compartment set temperature:
TFset (t) Total temperature deviation: e (t) = eR (t) + eF (t) Compression function: CMP (t) = CMP (t-1) + e (t) × Kp + (e (t) −e ( t-1)) × Ki +
(e (t) −2e (t−1) + e (t−2) × Kd Here, the condition for operating / stopping the compressor is determined as follows.

Compressor operation condition: CMP (t)> 30 Hz Compressor stop condition: CMP (t)> 25 Hz The difference between the operation condition and the stop condition is to maintain the stability of the system by providing hysteresis. is there.

Here, the case of restarting the operation will be further described.

When a variable capacity compressor is used as in inverter control, the rotational speed of the compressor may be determined based on the result of this operation.

That is, the variable number of compressors is 30 Hz, 3
In the case where the frequency is 5 Hz, 40 Hz, 45 Hz, 50 Hz, and 60 Hz, a value closest to the calculation result (for example, 40 Hz) may be used.

When a fixed capacity compressor is used, the operation may be restarted when the calculation result exceeds a predetermined value. That is, the variable number may be handled as 1 (selection of ON or OFF).

(Eighth Embodiment) Next, an eighth embodiment will be described.

FIG. 10 is a block diagram showing the configuration of a refrigerator-freezer according to this embodiment.

In the refrigerator of the seventh embodiment, hysteresis adding means 38, 39, 48, 4
9 is connected, and other configurations and operations are the same as those of the seventh embodiment.

More specifically, when the cooling room is switched, the characteristics of the controlled object may greatly change depending on the magnitude of the cooling load applied to the refrigerator cabinet or the cooling room.
In such a case, the deviation value input to the compressor operation determining means 26 fluctuates greatly, and as a result, the operation of the compressor may be unstable.

Therefore, as shown in FIG. 10, an appropriate hysteresis is provided for the detected temperature so that a rapid change can be suppressed.

[0113]

As described above, according to the refrigerator of the first aspect of the present invention, the number of rotations of the fan is controlled by the temperature in the refrigerator and the temperature of the cooler, so that unnecessary energy is not consumed.

According to the refrigerator of the second aspect, an appropriate hysteresis is provided for the detected various temperatures, so that a rapid fluctuation of the fan can be suppressed.

In the refrigerator according to the third aspect, an appropriate hysteresis is provided for the fan control deviation so that a rapid change of the fan can be suppressed.

According to the refrigerator of the fourth aspect, the compressor is operated, the refrigerant is supplied to the cooler, and it is confirmed that the cooler has cooled down. Never consume.

In the refrigerator according to the fifth aspect, the compressor is operated, the refrigerant is supplied to the cooler, and it is confirmed that the cooler has cooled. Never consume.

According to the refrigerator of the sixth aspect, the rotation speeds of the fans in the refrigerator compartment and the freezer compartment can be determined independently of the operation contents of the compressor and the refrigerant supply device, and the control can be simplified.

According to the refrigerator of the present invention, the refrigerator is preferentially controlled so as to be cooled between the cooling start temperature and the cooling end temperature, so that freezing due to excessive cooling of the refrigerator can be prevented. it can.

In the refrigerator according to the eighth aspect, since the compressor is operated / stopped with the cooling capacity required for the refrigerator compartment and the freezer compartment, the correction in the negative direction can be sufficiently performed.

According to the refrigerator of the ninth aspect, an appropriate hysteresis is provided for various detected temperatures, so that a sudden change in the compressor can be suppressed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a refrigerator body and a refrigeration cycle according to one embodiment of the present invention.

FIG. 2 is a schematic block diagram of a first embodiment of the present invention.

FIG. 3 is a schematic block diagram of a second embodiment.

FIG. 4 is an explanatory diagram of hysteresis in a second embodiment.

FIG. 5 is a schematic block diagram of a third embodiment.

FIG. 6 is a flowchart of a fourth embodiment.

FIG. 7 is a diagram showing a change in temperature of a refrigerator / freezer when a load is applied according to the related art of the sixth embodiment and the present invention.

FIG. 8 is a flowchart of the sixth embodiment.

FIG. 9 is a schematic block diagram of a seventh embodiment.

FIG. 10 is a schematic block diagram of an eighth embodiment.

[Explanation of symbols]

 Reference Signs List 10 refrigerator compartment cooler 11 refrigerator compartment fan 14 refrigerator compartment cooler 15 refrigerator compartment fan 17 compressor 31 refrigerator compartment air temperature detecting means 32 refrigerator compartment cooler temperature detecting means 33 refrigerator compartment air temperature deviation calculating means 34 refrigerator compartment cooler temperature Deviation calculating means 35 Refrigerator compartment fan operation determining means 36 Refrigerator compartment air temperature hysteresis adding means 37 Refrigerator compartment cooler temperature hysteresis adding means 38 Refrigerator compartment air temperature deviation hysteresis adding means 39 Refrigerator compartment cooler temperature deviation hysteresis adding means 41 Freezer compartment Air temperature detecting means 42 Freezing room cooler temperature detecting means 43 Freezing room air temperature deviation calculating means 44 Freezing room cooler temperature deviation calculating means 45 Freezing room fan operation determining means 46 Freezing room air temperature hysteresis adding means 47 Freezing room cooler Temperature hysteresis adding means 48 Freezer compartment air temperature deviation hysteresis Cis adding means 49 freezing compartment cooler temperature deviation hysteresis adding means

Continued on the front page (72) Inventor Takuya Kishimoto 1-6 Ota Toshiba-cho, Ibaraki-shi, Osaka Toshiba Abu E Co., Ltd. Osaka Office F-term (reference) 3L045 AA02 BA01 CA02 DA02 EA01 HA02 HA08 LA10 MA02 MA04 NA19 PA01 PA03 PA05

Claims (9)

[Claims] A compressor for compressing the refrigerant; a condenser for condensing the refrigerant from the compressor; a cooler for cooling the cooling chamber; and blowing the air cooled by the cooler to the cooling chamber. With fans. A refrigerator having a refrigeration cycle including: an air temperature detection unit that detects an air temperature of the cooling chamber; a cooler temperature detection unit that detects an evaporation temperature of the cooler; and an air temperature detected by the air temperature detection unit; A fan control deviation calculating unit for calculating a difference between the cooler temperature detected by the cooler temperature detecting unit as a fan control deviation; and a fan if the fan control deviation calculated by the fan control deviation calculating unit is larger than a predetermined value. And a fan operation determining unit that stops the fan when it is small. 2. An air temperature hysteresis adding section for providing hysteresis having a predetermined temperature range with respect to the air temperature detected by the air temperature detecting section and supplying the air temperature information provided with the hysteresis to a fan control deviation calculating section. Providing a hysteresis having a predetermined temperature range with respect to the cooler temperature detected by the cooler temperature detecting section, and adding a cooler temperature hysteresis for supplying the cooler temperature information provided with the hysteresis to the fan control deviation calculating section. The refrigerator according to claim 1, further comprising: a unit. 3. A fan control deviation for providing a hysteresis having a predetermined temperature width to the fan control deviation detected by the fan control deviation calculation unit, and supplying the fan control deviation information provided with the hysteresis to the fan operation determination unit. The refrigerator according to claim 1, further comprising a hysteresis adding unit. 4. The maximum fan rotation speed is limited in a stepwise manner as the fan control deviation calculated by the fan control deviation calculation section is smaller, and further, the fan is stopped when the fan control deviation is smaller than a predetermined value. The refrigerator according to any one of claims 1 to 3, further comprising a rotation speed limiting unit. 5. An air temperature deviation calculating section for calculating a difference between an air temperature of the cooling chamber and a set air temperature of the cooling chamber as an air temperature deviation, and the smaller the air temperature deviation calculated by the air temperature deviation calculating section is, the more the fan becomes. 5. The apparatus according to claim 1, further comprising a fan rotation speed determining unit configured to gradually reduce the rotation speed.
The refrigerator according to any of the above. 6. A refrigerator having a plurality of cooling chambers, wherein a plurality of coolers exist for cooling each of the cooling chambers, and a fan also blows air cooled by each of the coolers to each of the cooling chambers. The refrigerator according to any one of claims 1 to 5, further comprising a refrigerant supply device that is provided for each of the coolers, and further supplies a refrigerant from the condenser to the plurality of coolers. 7. The refrigerator according to claim 6, wherein the refrigerant supply device preferentially supplies the refrigerant from the condenser to the refrigerator compartment in the refrigerator having a refrigerator compartment and a freezer compartment in the refrigerator compartment. 8. A compressor control deviation calculating section for calculating a difference between a cooling chamber air temperature and a cooling chamber set air temperature as a compressor control deviation, and a compressor control deviation calculated by the compressor control deviation calculating section. A compression function calculating section for calculating a cooling capacity required for the compressor; and a compressor when the cooling capacity calculated by the compression function calculating section is larger than a predetermined value, and when the cooling capacity is smaller than the predetermined value. The refrigerator according to claim 1, further comprising: a compressor operation determination unit that stops the operation. 9. A compressor control deviation calculated by the compressor control deviation calculator is provided with a hysteresis having a predetermined temperature range, and the compressor control deviation information provided with the hysteresis is supplied to the compression function force calculator. 9. The refrigerator according to claim 8, further comprising a compressor control deviation hysteresis adding section.