JPH10318645A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which can efficiently carry out an optimum temperature control by providing evaporators and ability variable cold air circulating fans to respective temperature band spaces. SOLUTION: A plurality of chambers made of a refrigerating chamber 9, a low temperature chamber 11, a first freezer chamber 13 and a second freezer chamber 14 are separated into a first target temperature separate chamber 23 and a second target temperature separate chamber 25 which differ in setting temperatures and these target temperature separate chambers 23, 25 are independently partitioned. A first evaporator 33 and a first cold air circulating fan 35 are disposed in the first target temperature separate chamber 23 while a second evaporator 53 and a second cold air circulating fan 55 are disposed in the second target temperature separate chamber 25. An ability variable compressor 69 has its rotational speed set corresponding to either one of temperature bands of the target temperature separate chambers 23, 25 in response to temperatures sensors in respective target temperature separate chambers 23, 25 and the set temperature. The cold air circulating fans 35, 55 have their rotational speed varied in response to the outputs of temperature sensors thus enabling a temperature control of respective target temperature separate chambers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a refrigerator having a refrigeration cycle in which refrigerant discharged from a variable capacity compressor passes through a condenser, a throttle valve, and an evaporator, and returns to a compressor again.

[0002]

2. Description of the Related Art In a conventional refrigerator of this type, two different temperature spaces, for example, a refrigerator room and a freezer room are cooled by a cooling system including one evaporator and one cool air circulation fan. Usually, a cooling system including an evaporator and a cool air circulation fan is provided in a freezing room, and the cool air exchanged by the evaporator is cooled by a cool air circulation fan through a cool air duct and a damper for switching a flow path. The air is supplied to the space, and each is cooled to a predetermined set temperature.

On the other hand, for example, Japanese Patent Application Laid-Open No.
In the device disclosed in No. 53, an evaporator and a cool air circulating fan are provided in each of the refrigerator compartment and the freezer compartment, and each cool air circulating fan is controlled based on the temperature of each compartment to reduce the amount of refrigerant used and power consumption. At the same time, we are trying to achieve rapid cooling of each section room.

More specifically, operation control means for individually controlling the temperature of the freezing room and the refrigerating room is provided, and the power consumption due to excessive operation is reduced by selectively operating the cooling air circulation fans provided in each room. Can be reduced. Further, since the temperature of the freezer compartment and the refrigerating compartment is controlled separately, the structure of the cold air duct and the damper for switching the flow path can be simplified. Further, the compressor is turned on / off based on the temperature of the freezer or the refrigerator, and when the compressor is on, the cool air circulation fan of the refrigerator and the cool air circulation fan of the freezer are selected based on the temperature of the refrigerator or the freezer. By turning on / off in an efficient manner, efficient operation is performed to prevent energy consumption.

[0005]

As described above, in the prior art disclosed in Japanese Patent Application Laid-Open No. Hei 8-210753, the compressor and the cool air circulating fan provided in each room perform an intermittent operation that is repeatedly turned on / off. Therefore, the temperature inside the refrigerator in each room greatly fluctuates, and there is a limit to optimal temperature control suitable for each room.

[0006] The present invention has been made in view of the above,
It is an object of the present invention to provide a refrigerator in which an evaporator and a variable capacity cooling air circulation fan are provided for each temperature zone space so that optimum temperature control can be efficiently performed.

[0007]

In order to achieve the above object, according to the present invention, a refrigerant discharged from a variable capacity compressor passes through a condenser, a throttle valve, and an evaporator, and is again supplied to the compressor. A refrigerator having a refrigerating cycle, wherein a plurality of rooms formed in a multistage communication with doors for different target temperatures are divided into a plurality of temperature zone spaces having different set temperatures, and each temperature zone space is independently partitioned, and each temperature zone space is separated. An evaporator and a variable capacity cooling air circulation fan are provided for each of the plurality of temperature zone spaces, and the rotation speed of the variable capacity cooling air circulation fan provided in another temperature zone space or the capacity of the compressor according to a change in one of the plurality of temperature zone spaces. The point is to have means for controlling

According to the first aspect of the present invention, a plurality of communicating multi-stage rooms are divided into a plurality of temperature zone spaces, and an evaporator and a variable capacity cooling air circulation fan are provided for each temperature zone space. In order to control the rotation speed of the cooling air circulation fan provided in the other temperature zone space or the capacity of the compressor in accordance with the change in the situation of one temperature zone space, the temperature fluctuation in the interior of each temperature zone space is small, and Optimal temperature control that matches the temperature of the temperature zone space can be performed, and power saving can be achieved.

Further, the present invention described in claim 2 is based on claim 1.
In the invention described, the plurality of temperature zone spaces have at least a first temperature zone space having a set temperature of 0 ° C. or higher and a second temperature zone space having a set temperature lower than 0 ° C., and when the compressor is stopped. Stopping the cool air circulation fan in the second temperature zone space,
The cooling air circulation fan in the first temperature zone space is operated at the maximum rotation speed to defrost the evaporator in the first temperature zone space. The point is that the defrost heater provided in the evaporator in the temperature zone space is simultaneously energized to perform defrost.

According to the second aspect of the present invention, when the compressor is stopped, the cool air circulation fan in the first temperature zone space is operated at the maximum speed to perform defrosting of the evaporator. The heat exchange performance can always be maintained well, and defrosting can be performed in a short time.

Further, the present invention according to claim 3 provides the invention according to claim 1.
In the invention described, the plurality of temperature zone spaces have at least a first temperature zone space having a set temperature of 0 ° C. or higher and a second temperature zone space having a set temperature lower than 0 ° C., and when the compressor is stopped. Stopping the cool air circulation fan in the second temperature zone space,
The gist is to operate the cool air circulation fan in the first temperature zone space for a predetermined time to perform defrosting of the evaporator in the first temperature zone space.

According to the third aspect of the present invention, when the compressor is stopped, the cool air circulation fan in the first temperature zone space is operated for a predetermined time to defrost the evaporator. It is possible to prevent frost and waste of power consumption.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the plurality of temperature zones have at least a first temperature zone having a set temperature of 0 ° C. or higher and a second temperature zone having a set temperature of less than 0 ° C. A second temperature zone space, wherein the cooling air circulation fan in the second temperature zone space is stopped when the compressor is stopped, and the detection temperature of the temperature sensor in the first temperature zone space satisfies the defrost termination condition. The gist is that the cool air circulation fan in the first temperature zone space is operated to perform defrosting of the evaporator in the first temperature zone space.

According to a fourth aspect of the present invention, when the compressor is stopped, the cool air circulation fan in the first temperature zone space is operated based on the temperature detected inside the refrigerator until the defrost is completed, thereby defrosting the evaporator. Therefore, wasteful power consumption can be prevented.

The present invention according to claim 5 provides the present invention according to claim 1.
In the invention described, the plurality of temperature zone spaces have at least a first temperature zone space having a set temperature of 0 ° C. or higher and a second temperature zone space having a set temperature lower than 0 ° C., and when the compressor is stopped. Stopping the cool air circulation fan in the second temperature zone space,
Until the detected temperature of the defrost sensor provided in the first temperature zone space satisfies the defrost termination condition, the cool air circulation fan in the first temperature zone space is operated to defrost the evaporator in the first temperature zone space. The main point is to perform

According to the present invention, when the compressor is stopped, the cool air circulation fan in the first temperature zone space is operated until the defrost is completed based on the temperature detected by the defrost sensor, and the evaporator is operated. Since defrosting is performed, useless consumption of electric power can be prevented.

Further, the present invention described in claim 6 provides the present invention according to claim 1.
In the invention described above, a temperature range in which the compressor is operated is set for each of the temperature zone spaces, and when the temperature of any of the temperature zone spaces reaches the compressor operating temperature range, the compressor rotates at a maximum speed. The gist is that the compressor is started up by a number and the compressor is operated until the deceleration condition of the compressor is satisfied.

According to the present invention, the temperature range for operating the compressor is set for each of the temperature zone spaces, and the temperature of any one of the temperature zone spaces becomes the compressor operating temperature range. At this time, since the compressor is started at the maximum number of revolutions and is operated until the deceleration condition is satisfied, the inside of the refrigerator can be quickly cooled, and the temperature inside the refrigerator can be maintained satisfactorily.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the plurality of temperature zones have at least a first temperature zone having a set temperature of 0 ° C. or more and a second temperature zone having a set temperature of less than 0 ° C. When the internal temperature of the plurality of temperature zone spaces is within the compressor operating range, the rotation speed of the compressor is determined based on the internal temperature of the second temperature zone space. The point is to make a decision.

According to the present invention, when all the internal temperatures of the plurality of temperature zone spaces are within the compressor operating range, the rotational speed of the compressor is increased in the second temperature zone space. Since the temperature is determined based on the temperature, the internal temperature can be quickly cooled to the set temperature.

The present invention according to claim 8 provides the present invention according to claim 1.
In the invention described above, when the cooling load is large after the power of the refrigerator body is turned on, at least one of the cool air circulation fans provided for each temperature zone space is stopped for a predetermined time.

According to the present invention, when the cooling load is large after the power is turned on, at least one of the cool air circulation fans is stopped for a predetermined time, so that the cooling load is reduced, and Damage can be prevented.

Further, the present invention described in claim 9 is based on claim 1.
In the invention described above, after starting the compressor, at least one of the cool air circulation fans provided for each of the temperature zone spaces does not start operation until the temperature of the evaporator is sufficiently cooled. I do.

According to the present invention, at least one cool air circulation fan does not start operating after the compressor is started until the temperature of the evaporator is sufficiently cooled. Can be prevented.

According to a tenth aspect of the present invention, in the first aspect of the invention, after the compressor is started, the cool air circulation provided for each of the temperature zone spaces until the temperature of the evaporator is sufficiently cooled. At least one of the fans does not start running,
After starting the cool air circulation fan, the gist is to operate the cool air circulation fan at the maximum rotation speed until the deceleration condition is satisfied.

According to the present invention, at least one cool air circulating fan does not start operation until the temperature of the evaporator is sufficiently cooled after the start of the compressor. Thereafter, since the cool air circulation fan is operated at the maximum number of revolutions, the inside of the refrigerator can be cooled quickly, and a good temperature in the refrigerator can be maintained.

According to the eleventh aspect of the present invention, in the first aspect of the invention, the cool air circulating fan provided for each temperature zone space starts operating at the same time as the compressor is started. The gist is to operate the cooling circulation fan at the minimum rotation speed until the temperature of the cooling circulating fan becomes lower than the internal temperature of each temperature zone space or the set temperature.

According to the eleventh aspect of the present invention, each cool air circulating fan starts operating at the same time as the compressor is started, and the cool air circulating fan is minimized until the evaporator temperature becomes lower than the internal temperature or the set temperature. Since operation is performed at the rotation speed, wasteful consumption of power can be prevented.

According to a twelfth aspect of the present invention, in the first aspect of the present invention, when the compressor is operated, the cool air circulation fan of the temperature zone space of the plurality of temperature zone spaces whose doors are open. The gist is that the operation is stopped and the operation of only the cool air circulation fan in the temperature zone space where the door is not opened is continued.

According to the twelfth aspect of the present invention, when the compressor is operating, the operation of the cool air circulation fan in the temperature zone space where the door is open is stopped, and the cool air in the temperature zone space where the door is not opened is stopped. Since the operation of only the circulation fan is continued, it is possible to minimize the temperature fluctuation in the refrigerator and to save power.

According to a thirteenth aspect of the present invention, in the first aspect of the invention, when the compressor is stopped, after the door is opened and closed, the cool air circulation fan in the temperature zone space in which the door is opened and closed is operated for a predetermined time. The point is to drive.

According to the thirteenth aspect of the present invention, when the compressor is stopped, after the door is opened and closed, the cool air circulation fan in the temperature zone space where the door is opened and closed is operated for a predetermined time, so that the temperature distribution in the refrigerator is improved. In addition, the temperature in the refrigerator can be maintained satisfactorily.

According to a fourteenth aspect of the present invention, in the first aspect of the present invention, the rotation speed of the cooling air circulation fan provided for each temperature zone space is adjusted to the internal temperature of the temperature zone space or the blown air. The point is to determine the temperature.

According to the present invention, since the rotation speed of each cooling air circulation fan is determined by the temperature in the chamber or the temperature of the blown air in each temperature zone space, the cooling operation is performed promptly and appropriately. And a good internal temperature can be maintained.

[0035]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the internal structure of a refrigerator according to the first embodiment of the present invention. In FIG.
Reference numeral 1 denotes a refrigerator body of the refrigerator 3, and an exterior panel 5
Is provided with a heat insulating material 7 inside. Inside the refrigerator body 1, a refrigerator compartment 9, a low-temperature compartment 11, a first compartment,
The freezer compartment 13 and the second freezer compartment 15 are configured in multiple stages, and the refrigerator compartment 9, the low-temperature compartment 11, the first and second freezer compartments 13 and 15 are provided with opening and closing doors 17, 18, 19 and 20, respectively. Opening and closing of the doors 17, 18, 19, 20 enables food to be taken in and out.

The low-temperature room 11 and the first freezing room 13 are vertically separated by a heat insulating partition wall 21 into a first target temperature separate room 23 and a second target temperature separate room 25 having different set temperatures. .

The first target temperature separate chamber 23 is composed of a refrigerator compartment 9 and a low-temperature compartment 11, and the refrigerator compartment 9 and the low-temperature compartment 11 are vertically divided by a partition plate 27 so that cool air circulates. From the place where cold air of the same temperature circulates,
No heat insulating material is required, and detachable shelves 2 provided in the storage
9 and the storage container 31 are formed to be thin with the same members, and are set so that the occupied space is small.

The first evaporator 33 is located at the top of the back wall, which is the dead space of the refrigerator compartment 9 of the first target temperature separate compartment 23.
And a first variable capacity cooling air circulation fan 35.

In the first evaporator 33, the cold air that has undergone heat exchange is sent forward by the first variable capacity cool air circulation fan 35 on the side of the open / close door 17, and then flows through the refrigerator compartment 9 and the low-temperature compartment 11 by arrows. By repeating the circulation from the rear cold air flow path 41 to the first evaporator 33 again, as shown in FIG.
It is set so that the above-mentioned internal temperature can be obtained. The cool air flow path 41 is formed by notching a part of the rear surface of the shelf, and is formed by cutting a part of the rear surface of the partition plate 27, and the refrigerator 9 is formed at the front side.
It is formed by providing an opening 43 that passes through the chamber to the low-temperature chamber 11.

The second target temperature separate chamber 25 includes first and second freezing chambers 13 and 15, and the first freezing chamber 13 and the second freezing chamber 15 are vertically moved by a partition plate 49 so that cool air is circulated. It is partitioned. The partition plate 49 is made of the same material as the storage container 51 provided in the refrigerator, and does not require a heat insulating material from a place where cold air of the same temperature circulates, and is formed thin.

A second evaporator 53 and a second variable capacity cooling air circulating fan 5 are provided on the back wall of the second target temperature separate chamber 25.
5 are arranged.

One of the cool air exchanged in the second evaporator 53 is introduced into the first freezer compartment 13 from the cool air passage 61 of the partition plate 49 by the second variable capacity cool air circulation fan 55, and the other to the corner. From the space between the wall 63 and the partition plate 49, the second freezer compartment 1
It is sent to 5. The cool air that has passed through the first freezer compartment 13 joins the second freezer compartment 15 through a communication hole 65 formed in front of the partition plate 49 that passes from the first freezer compartment 13 to the second freezer compartment 15. Then, by repeatedly circulating through the gap between the storage container 51 of the second freezing compartment 15 and the bottom wall of the refrigerator and returning to the second evaporator 53, a negative internal temperature is obtained. I have.

A variable capacity compressor 69 is provided in a machine room 67 provided at the lowermost portion on the back side of the refrigerator body 1, and a condenser 71 and a throttle valve 73 are also provided (not shown in FIG. 1). The first evaporator 33, the first
The refrigeration cycle shown in FIG. 2 is configured together with the variable capacity cool air circulation fan 35, the second evaporator 53, and the second variable capacity cool air circulation fan 55.

That is, in the refrigeration cycle shown in FIG.
The first evaporator 33 and the second evaporator 53 are connected in series, and the refrigerant discharged from the compressor 69 is supplied to the condenser 71, the throttle valve 73, the first evaporator 33, and the second evaporator 53. In order, and returns to the compressor 69 again.

In the refrigerator configured as described above, the variable capacity compressor 69 is provided with a temperature sensor provided in each of the first and second target temperature separate chambers 23 and 25 constituting each temperature zone space. 1st according to output and set temperature
The number of revolutions is set in accordance with one of the temperature zones of the first and second target temperature separate chambers 23 and 25, and the first and second target temperature separate chambers 23 and 25 are provided with first and second target temperature separate chambers 23 and 25, respectively.
The second and third variable capacity cooling air circulation fans 35 and 55 variably control the respective rotation speeds in accordance with the outputs of the respective temperature sensors to thereby control the first and second target temperature separate chambers 2.
3, 25 temperature adjustments can be respectively performed.

More specifically, the first freezer compartment 13 and the second freezer compartment 15 are usually set at -18 ° C to -20 ° C, and the refrigerator compartment 9 and the low temperature compartment 11 are set at 0 ° C to 3 ° C. I have. In the second target temperature separate chamber 25, the cool air that has passed through the second evaporator 53 by driving the second variable capacity cool air circulation fan 55 is supplied to the first freezing chamber 13 and the second freezing chamber 15 as described above. At this time, the blown air temperature becomes −24.
The rotation speed of the second cool air circulation fan 55 is controlled so that the temperature of the second cool air circulation fan 55 becomes equal to the temperature of the second cooling air.

The first target temperature separate chamber 23 is set at 0 ° C.
Although maintained at 3 ° C., the temperature of the first evaporator 33 is substantially the same as that of the second evaporator 53 because it is connected in series to the second evaporator 53 as shown in FIG. . Therefore,
The rotation speed of the first variable capacity cool air circulation fan 35 is controlled such that the cool air blow-out temperature becomes about -3 ° C. Further, when the temperature in the refrigerator changes due to a change in the outside air temperature or opening and closing of the door, the rotation speed of the variable capacity compressor 69 is controlled in accordance with the refrigerator temperature.

When the temperature of the second evaporator 53 changes, the temperature of the first evaporator 33 also changes. However, the first cool air circulation fan 35 changes the temperature of the cold air blown into the refrigerator compartment 9 to the set temperature. Can be maintained, and the temperature of the first target temperature separate chamber 23 can be maintained. When the first target temperature separate chamber 23 is within the set temperature range, the operation of the first cool air circulation fan 35 is stopped, and the operation of only the second cool air circulation fan 55 is performed.

The normal operation of the refrigerator according to this embodiment will be described with reference to the flowchart shown in FIG.
When the power is supplied to the refrigerator main body 1 and the pull-down is performed, the variable capacity compressor 69 and the first and second variable capacity cool air circulation fans 35 and 55 operate (step 31).
0,320). Then, it is checked whether or not the defrost condition is satisfied (step 330). If the defrost condition is satisfied, defrost is performed (step 340), and the process returns to step 320 to repeat the same operation. If the defrosting condition is not satisfied, the compressor 69 and the cool air circulation fans 35 and 55 are turned off (step 350), and the process returns to step 320 to repeat the same operation.

As described above, in the present embodiment, the variable capacity compressor 69 and the first and second target temperature separate chambers 23,
The first and second cool air circulating fans 35 and 55 provided in the respective chambers 25 can be used to change the rotation speed in accordance with the temperature conditions of the target temperature separate chambers 23 and 25, so that the temperature fluctuation in the refrigerator Is small and each target temperature separate room 23,2
5 can be optimally controlled, and power can be saved.

Next, a second embodiment of the present invention will be described. In the second embodiment, when the compressor 69 is stopped, the second target temperature separate chamber 25 including the freezing chambers 13 and 15 is provided.
Of the second cool air circulation fan 55 is stopped, and the first cool air circulation fan 35 of the first target temperature separate chamber 23 is operated at the maximum rotation speed, and the first evaporator 33 of the first target temperature separate chamber 23 is operated. Of the first target temperature separate chamber 2 when the defrosting of the second evaporator 53 of the second target temperature separate chamber 25 is started.
In the third evaporator 33, power is simultaneously supplied to a defrost heater provided in the first evaporator 33 to perform defrost.

That is, during the operation of the compressor 69, the evaporators 33 and 53 of the target temperature-specific chambers 23 and 25 are always kept at 0 ° C.
Because of the following, frost formation gradually progresses. Especially,
The first target temperature separate chamber 23 has a higher humidity than the second target temperature separate chamber 25, and is easily frosted. Since frosting lowers the heat exchange performance of the evaporator, it is necessary to frequently perform defrosting. First and second target temperature separate chambers 23, 25
If the temperatures are within the set temperature ranges, the operation of the compressor 69 and the cool air circulation fans 35 and 55 of the target temperature separate chambers 23 and 25 is stopped.

Next, when the temperature of the first evaporator 33 in the first target temperature separate chamber 23 reaches an arbitrary temperature of 0 ° C. or more,
Alternatively, immediately after the operation of the compressor 69 is stopped, the first cool air circulation fan 35 of the first target temperature separate chamber 23 is operated at the maximum rotation speed. That is, the temperature of the first target temperature separate chamber 23 is 3
Because the temperature is about 0 ° C., the operation of the first cool air circulation fan 35 causes air at 0 ° C. or higher to circulate in the refrigerator while passing through the first evaporator 33, and adheres to the first evaporator 33. The frost will gradually melt and defrost will proceed. At this time, since the defrost water is not discharged out of the refrigerator, the inside of the first target temperature separate chamber 23 is maintained at a high humidity suitable for food preservation.

The operation of the second embodiment will be described with reference to the flowchart shown in FIG. When the temperatures of the target temperature separate chambers 23 and 25 are within the set temperature ranges, and the compressor 69 and the second cool air circulation fan 55 are turned off (steps 410 and 420), the first target temperature separate chamber 2 is set.
The third cool air circulation fan 35 is operated at the maximum number of revolutions (step 430), and the first evaporator 33 is defrosted.
It is checked whether the defrosting of the first evaporator 33 has been completed (step 440), and when it has been completed, the first cool air circulation fan 35 is turned off (step 450).

As described above, in the present embodiment, the compressor 6
Since the first evaporator 33 is defrosted every time the operation 9 is stopped, the heat exchange performance is always kept good. In addition, since the defrost water is released each time defrosting is performed, the first target temperature separate chamber 23 is maintained at a high humidity, and is in a favorable state for storing food. At this time, since the first cool air circulation fan 35 is operated at the maximum rotation speed, the defrosting time can be reduced.

Next, a third embodiment of the present invention will be described. In the third embodiment, when the compressor 69 is stopped, the second cool air circulation fan 55 of the first target temperature separate chamber 23 is stopped similarly to the second embodiment, and the cool air circulation fan of the first temperature zone space is stopped. Is operated for a predetermined time, and the first target temperature separate chamber 2 is operated.
Third, the first evaporator 33 is defrosted.

That is, when the temperatures of the first and second target temperature separate chambers 23 and 25 are within the set temperature ranges, the operation of the compressor 69 and the cool air circulation fans 35 and 55 of the respective target temperature separate chambers 23 and 25 is controlled. Then, the first cool air circulation fan 35 is started, the defrosting of the first evaporator 33 is started, and the first cool air circulation fan 35 is operated for a predetermined time.

The operation of the third embodiment will be described with reference to the flowchart shown in FIG. Each target temperature separate room 23,
25 are within the set temperature range, and the compressor 6
9 and the cool air circulation fan 55 are turned off (steps 510 and 520), the first cool air circulation fan 35 in the first target temperature separate chamber 23 is operated (step 530), and the first cool air circulation fan 35 is activated.
Of the evaporator 33 is performed. First cool air circulation fan 35
It is checked whether or not the operation time t has become longer than the predetermined set time ts (step 540). If it has become longer, it is determined that the defrosting of the first evaporator 33 has been completed, and the first The cooling air circulation fan 35 is turned off (step 550).

As described above, in the present embodiment, the compressor 6
During the suspension of 9, instead of keeping the cool air circulation fan running,
Since the operation is performed only for a predetermined time necessary for defrosting, unnecessary power is not consumed. In addition, when the cool air circulation fan is operated, the fan motor generates heat. However, by operating the cool air circulation fan only for a predetermined time, heat generation is minimized, and power saving can be achieved. Further, since the end of the defrost is determined by the time, it is not necessary to provide a defrost sensor for detecting the end of the defrost, and the cost can be reduced.

Next, a fourth embodiment of the present invention will be described. In the fourth embodiment, when the compressor 69 is stopped, the second cool air circulation fan 55 of the second target temperature separate chamber 25 is stopped, and the temperature detected by the temperature sensor in the first target temperature separate chamber 23 is the end of defrosting. Until the conditions are satisfied, the first target temperature separate room 23
By operating the first cool air circulation fan 35, the first evaporator 33 in the first target temperature separate chamber 23 is defrosted.

That is, when the temperatures of the first and second target temperature separate chambers 23 and 25 are within the set temperature ranges, the operation of the compressor 69 and the cool air circulation fans 35 and 55 is stopped, and then the first The first cool air circulation fan 35 in the target temperature separate chamber 23 is started, and defrosting of the first evaporator 33 is started. Then, the first cool air circulation fan 35 is continuously operated until the temperature detected by the temperature sensor in the first target temperature separate chamber 23 reaches a predetermined temperature.

The operation of the fourth embodiment will be described with reference to the flowchart shown in FIG. Each target temperature separate room 23,
25 are within the set temperature range, and the compressor 6
9 and the cool air circulation fan 55 are turned off (steps 610 and 620), the first cool air circulation fan 35 in the first target temperature separate chamber 23 is operated (step 630), and the first cool air circulation fan 35 is operated.
Of the evaporator 33 is performed. It is checked whether or not the detected temperature Ta in the first target temperature separate chamber 23 detected by the temperature sensor in the first target temperature separate chamber 23 is higher than a predetermined set temperature Tas (step 640). If the defrost termination condition that the size becomes larger is satisfied, the first cool air circulation fan 35 is turned off (step 650).

As described above, in the present embodiment, the compressor 6
9, do not continue to operate the cooling air circulation fan,
Since the operation is performed only during the time until the defrosting is completed, useless power consumption can be prevented. In addition, when operating the cool air circulation fan, the heat of the fan motor is generated,
In order to operate the cooling air circulation fan only for a predetermined required time,
Heat generation is minimized, and power saving can be achieved.

Next, a fifth embodiment of the present invention will be described. In the fifth embodiment, when the compressor 69 is stopped, the second cool air circulation fan 55 of the second target temperature separate chamber 25 is stopped, and the detection temperature of the defrost sensor provided in the first target temperature separate chamber 23 is reduced. Until the frost termination condition is satisfied, the first cool air circulation fan 35 of the first target temperature separate chamber 23 is operated to defrost the first evaporator 33 of the first target temperature separate chamber 23.

That is, when the temperatures of the first and second target temperature separate chambers 23 and 25 are within the set temperature ranges, the operation of the compressor 69 and the cool air circulation fans 35 and 55 of each target temperature separate chamber is stopped. Then, the first cool air circulation fan 35 of the first target temperature separate chamber 23 is started, and the first cool air circulation fan 35 is started.
The defrost of the first evaporator 33 of the target temperature separate chamber 23 is started, and the first cool air circulation fan 35 is operated until the defrost sensor provided in the first evaporator 33 detects the end of defrost.

The operation of the fifth embodiment will be described with reference to the flowchart shown in FIG. Each target temperature separate room 23,
25 are within the set temperature range, and the compressor 6
When the cooling air circulation fan 9 and the cooling air circulation fan 55 are turned off (steps 710 and 720), the first cooling air circulation fan 35 in the first target temperature separate chamber 23 is operated (step 730).
Of the evaporator 33 is performed. It is checked whether or not the temperature Tb detected by the defrost sensor provided in the first evaporator 33 is higher than a predetermined internal temperature or a set temperature Tbs (step 740). When the frost end condition is satisfied, the first cool air circulation fan 35 is turned off (step 750).

As described above, in the present embodiment, the compressor 6
During the suspension of 9, instead of keeping the cool air circulation fan running,
Since the operation is performed only until the defrost is completed, wasteful consumption of electric power can be prevented. Further, when the cool air circulation fan is operated, the fan motor generates heat. However, since the cool air circulation fan is operated only for a necessary time, heat generation is minimized, and power can be saved.

Next, a sixth embodiment of the present invention will be described. In the sixth embodiment, the temperature range in which the compressor 69 is operated is set for each of the first and second target temperature separate chambers 23 and 25, and the temperature of one of the target temperature separate chambers is set to the compressor operating temperature range. When this happens, the compressor 69 is started at the maximum number of revolutions, and is operated until the deceleration condition of the compressor is satisfied.

That is, when the detected temperature of at least one of the internal temperature sensors provided in each of the target temperature separate chambers 23, 25 exceeds the set temperature range, the compressor 69 is operated at the maximum number of revolutions. The compressor 69 is decelerated when the time exceeds or when the internal temperature reaches a preset compressor deceleration condition temperature.

The operation of the sixth embodiment will be described with reference to the flowchart shown in FIG. When the compressor 69 is off, it is checked whether the internal temperature TF of the second target temperature separate chamber 25 is higher than the set temperature TFS for the second target temperature separate chamber 25 (step 810). Then, it is further checked whether or not the internal temperature TR of the first target temperature separate chamber 23 is higher than the set temperature TRS of the first target temperature separate chamber 23 (step 820). If any of the internal temperatures is higher than the set temperature, the compressor 69 is operated at the maximum rotational speed (step 830). Then, for example, when the operation time exceeds a predetermined time, or when the deceleration condition of the compressor such as the internal temperature reaches a preset compressor deceleration condition temperature is achieved (step 840), the compressor 6 is stopped.
9 is decelerated (step 850).

As described above, in the present embodiment, when the temperature of any one of the target temperature chambers becomes higher than the set temperature and cooling operation is required, the compressor 69 is operated at the maximum rotation speed. The inside can be quickly cooled. For this reason, the internal temperature is kept good.

Next, a seventh embodiment of the present invention will be described. In the seventh embodiment, the target temperature separate chambers 23, 25
Is determined based on the internal temperature of the second target temperature separate chamber 25 when all of the internal temperatures are within the operating range of the compressor 69.

That is, when the internal temperature of each of the first and second target temperature separate chambers 23 and 25 exceeds the respective set temperature range and the cooling operation is required, the operation of the compressor 69 is switched to the second operation. The compressor 69 operates at a rotation speed corresponding to the internal temperature of the second target temperature separate chamber 25 with priority given to the target temperature separate chamber 25. For example, the compressor 69 is operated when there is a large refrigeration load in the freezing room, and even when the first target temperature separate room 23 can be sufficiently cooled later, the internal temperature of the second target temperature separate room 25 is reduced by the compressor 69. Until the deceleration temperature is reached, the motor runs at the maximum speed.

In the seventh embodiment, when the internal temperature rises due to, for example, opening / closing of a door or input of a cooling load, the operation of the compressor 69 in which the second target temperature separate chamber 25, which is more difficult to cool, is prioritized. By doing so, the internal temperature can be quickly cooled to the set temperature. In addition, the temperature influence of foods and the like in the freezer compartment is reduced, and a good condition can be maintained during storage.

Next, an eighth embodiment of the present invention will be described. In the eighth embodiment, when the cooling load is large after the power of the refrigerator main body is turned on, each target temperature separate chamber 23,
At least one of the variable capacity cooling air circulation fans 35 and 55 provided for every 25 is stopped for a predetermined time.

That is, when the power of the refrigerator body is turned on, the inside of the refrigerator is not cooled, and particularly when the cooling load is large such as when the ambient temperature of the space where the refrigerator is installed is high, the temperature and the discharge pressure of the compressor 69 are reduced. Very high. For this reason, the operation of at least one of the cool air circulating fans 35 and 55 provided in the target temperature separate chambers 23 and 25 is stopped during the preset predetermined time. Alternatively, a temperature sensor or a pressure sensor is provided in the compressor 69, and when the detected temperature or the detected pressure exceeds a certain set value, at least one of the cooling air circulation fans 35, 55 provided in the target temperature separate chambers 23, 25 is operated. To stop.

The operation of the eighth embodiment will be described with reference to the flowchart shown in FIG. When the power of the refrigerator body is turned on, the compressor 69 and the cool air circulation fans 35 and 55 are turned on.
Is turned on (step 910), it is checked whether the cooling load is large (step 920). If the cooling load is large, one of the cool air circulation fans is turned off (step 930). Then, the cooling air circulation fan is kept off until the off time To of the cooling air circulation fan becomes longer than the set time Tos (step 940), and after the set time has elapsed, the cool air circulation fan is turned on (step 940). 950).

As described above, in the present embodiment, when the cooling load is large, the compressor 69 becomes abnormally high temperature and pressure, and may be broken. At high pressure, the operation of the cool air circulation fan is stopped, thereby reducing the cooling load and preventing the compressor 69 from breaking.

Next, a ninth embodiment of the present invention will be described. In the ninth embodiment, after the compressor 69 is started, each target temperature separate chamber 2 is kept until the temperature of the evaporator is sufficiently cooled.
At least one of the cool air circulation fans 35 and 55 provided for every 3, 25 does not start operation.

That is, while the compressor 69 is stopped, the evaporator temperature of each of the target temperature-specific chambers 23 and 25 is kept at the respective target temperature-specific chamber 2
It is almost the same as the inside temperature of 3, 25. Compressor 6
Immediately after the startup of the evaporator 9, since the temperatures of these evaporators are not sufficiently cooled, the temperature detected by the temperature sensors provided in the evaporators during the predetermined time or below the internal temperature of the target temperature separate chambers 23 and 25 or The operation of at least one of the cool air circulation fans 35 and 55 is not started until the temperature reaches the set temperature or lower.

Referring to the flowchart shown in FIG.
The operation of the ninth embodiment will be described. The compressor 69 is started from a state where the compressor 69 and the cool air circulation fan are off (step 1010). At this time, each target temperature separate room 23,
It is checked whether or not the temperature TE of the evaporator 25 is lower than the set temperature TEs (step 1020). If the temperature of the evaporator is lower than the set temperature, the cool air circulation fans 35,5
5 is started (step 103).
0).

As described above, in the present embodiment, the compressor 6
Since the operation of the cool air circulation fan is stopped until the temperature of the evaporator immediately after the start of the operation at 9 reaches a temperature required for cooling, it is possible to prevent unnecessary power consumption.

Next, a tenth embodiment of the present invention will be described. In the tenth embodiment, after the compressor 69 is started, the cool air circulation fans 35, 5 provided for each of the target temperature separate chambers 23, 25 until the temperature of the evaporator is sufficiently cooled.
At least one of No. 5 does not start the operation, and after the start of the cool air circulation fan, operates the cool air circulation fan at the maximum rotation speed until the deceleration condition is satisfied.

That is, during the operation of the compressor 69, the cool air circulating fans 35 and 55 of the target temperature-specific chambers 23 and 25 are set to the set temperature range when the internal temperature of the target temperature-specific chambers exceeds the set temperature range. Until the start, the operation of each cool air circulation fan is started, since the evaporator has already been sufficiently cooled, the operation is started at the maximum number of revolutions, and after a lapse of a predetermined time set in advance, or When the internal temperature reaches the cooling air circulation fan deceleration condition temperature, the speed is reduced.

Referring to the flowchart shown in FIG.
The operation of the tenth embodiment will be described. The compressor 69 is started from the state where the compressor 69 and the cool air circulation fan are off (step 1110). At this time, each target temperature separate room 2
It is checked whether the temperatures TE of the evaporators 3 and 25 are lower than the set temperature TEs (step 1120). If the temperature of the evaporator is lower than the set temperature, the cooling air circulation fan 3
One of the operations 5 and 55 is started at the maximum rotational speed (step 1130). Then, when the deceleration condition of the cool air circulating fan such as elapse of a predetermined time is satisfied, the cool air circulating fan is decelerated (steps 1140 and 115).
0).

As described above, in this embodiment, when the cool air circulation fan is started, that is, when the internal temperature of the target temperature separate room exceeds the set temperature and the temperature of the evaporator is sufficiently cooled, the cool air circulation fan is cooled. By operating the circulation fan at the maximum operation speed, the inside of the refrigerator can be quickly cooled.
For this reason, it is possible to maintain a good temperature in the refrigerator, and it is possible to prevent adverse effects on the food in the refrigerator.

Next, an eleventh embodiment of the present invention will be described. In the eleventh embodiment, each target temperature separate room 2
The cool air circulation fans 35 and 55 provided for every 3, 25
The operation is started simultaneously with the activation of the compressor 69, but the cool air circulation fan is operated at the minimum rotation speed until the temperature of the evaporator becomes lower than the internal temperature of each of the target temperature separate chambers 23, 25 or the set temperature. .

That is, when the compressor 69 is stopped, the temperature of the evaporator in each of the target temperature separate chambers 23 and 25 is substantially the same as the internal temperature of each of the target temperature separate chambers 23 and 25. Immediately after the start of the compressor 69, the temperatures of these evaporators are not sufficiently cooled. Therefore, the temperature detected by the temperature sensor provided in each evaporator for each predetermined temperature or the temperature of each of the target temperature separate chambers 23, 25 is not sufficient. The cool air circulation fan is operated at the minimum rotation speed until the temperature falls below the internal temperature or below the set temperature.

Referring to the flowchart shown in FIG.
The operation of the eleventh embodiment will be described. The compressor 69 is turned on, and the cool air circulation fan is operated at the minimum rotation speed (steps 1210 and 1220). Then, it is checked whether or not the temperature TE of the evaporator has become lower than the set temperature or the internal temperature Ts (step 1230). When the temperature TE becomes lower, the rotational speed of the cool air circulation fan is increased (step 1).
240).

As described above, in the present embodiment, the cool air circulation fan is operated at the minimum rotation speed until the temperature of the evaporator reaches the temperature required for cooling the target temperature separate chambers 23, 25, whereby the cool air This prevents unnecessary power consumption of the circulation fan.

Next, a twelfth embodiment of the present invention will be described. In the twelfth embodiment, during the operation of the compressor 69, the operation of the cool air circulation fan of the target temperature-specific chamber, of which the door is open, among the plurality of target temperature-specific chambers 23 and 25 is stopped,
The operation of only the cool air circulating fan in the target temperature separated room where the door is not opened is continued.

That is, during the operation of the compressor 69, specifically, when the internal temperature of the target temperature separate chamber is not within the set temperature range, the cool air circulation fan continues to operate. In such a state, when the door of either the first target temperature separate room 23 or the second target temperature separate room 25 is opened, the operation of the cool air circulation fan of the target temperature separate room with this door opened is stopped. . The cool air circulation fan whose door is not opened continues to operate.

Next, the operation of the twelfth embodiment will be described with reference to the flowchart shown in FIG. Compressor 69
Is operating and the first and second cool air circulation fans 35 and 55 are also operating (step 13).
10, 1320), when the door 17 or 18 of the first target temperature separate chamber 23 is opened (step 1330),
The first cool air circulation fan 35 of the target temperature separate chamber 23 is turned off (step 1340). When the door 19 or 20 of the second target temperature separate chamber 25 is opened (step 1).
350), the second cool air circulation fan 55 of the second target temperature separate chamber 25 is turned off (step 1360).

As described above, in the present embodiment, it is possible to prevent the cold air from flowing out of the refrigerator and the inflow of air outside the refrigerator when the door is opened, thereby minimizing fluctuations in the temperature inside the refrigerator. And power saving can be achieved. Further, since warm and humid air outside the refrigerator does not flow, frost formation on the evaporator does not progress. The cooling air circulating fan in the target temperature separated room without opening the door can continue the cooling operation without being affected by the change in the internal temperature due to the opening of the other door.

Next, a thirteenth embodiment of the present invention will be described. In the thirteenth embodiment, when the compressor 69 is stopped, after the door 17-20 is opened and closed, the cool air circulation fan 3 of the target temperature separated chamber 23 or 25 that opened and closed the door is opened.
5 or 55 is operated for a predetermined time.

That is, when the compressor 69 is stopped, specifically, when the temperatures in the first and second target temperature separate chambers 23 and 25 are both within the set temperature range, the cool air circulation fan 35 of each target temperature separate chamber is used. , 55 also stop operating. At this time, when the door is opened and closed, the cool air circulating fan in the target temperature separated chamber that opened and closed the door is operated for a predetermined time.

Referring to the flowchart shown in FIG.
The operation of the thirteenth embodiment will be described. Compressor 69
If the cool air circulation fans 35 and 55 of each target temperature separate room are off (step 1410), and one of the doors opens and closes (step 1420), the cool air circulation fan of the target temperature separate room that opened and closed this door is turned on. (Step 1
430). When the operation time Tf of the cool air circulation fan reaches a predetermined set time Tfs (step 1440), the operation of the cool air circulation fan is stopped (step 1450).

As described above, in this embodiment, when the door is opened and closed, cold air inside the refrigerator and air outside the refrigerator occur, and the temperature inside the refrigerator becomes non-uniform. By operating, the inside temperature distribution can be improved, and thereby the inside temperature can be favorably maintained.

Next, a fourteenth embodiment of the present invention will be described. In the fourteenth embodiment, each target temperature separate room 2
The rotation speeds of the cool air circulation fans 35 and 55 provided for each of the third and the third temperature 25 are determined based on the internal temperature of the chambers 23 and 25 or the temperature of the blown air.

That is, during operation of the compressor 69, when the cool air circulation fans 35, 55 of the respective target temperature separate chambers 23, 25 are operated, the rotation speed of the cool air circulation fans 35, 55 is provided in the respective target temperature separate chambers 23, 25. It is determined by the difference between the detected temperature of the internal temperature sensor and the set temperature, or by the difference between the detected temperature of the temperature sensor provided at the outlet and the set temperature. For example, when a freezing load is applied to the freezing compartments 13 and 15 and the temperature inside the freezing compartments rises sharply, the compressor 69 starts operating at the maximum rotation speed. As the cooling proceeds, the temperature of the refrigerator becomes lower, and the difference between the inside temperature and the set temperature becomes smaller. At this time, the rotation speed of the cool air circulation fan in the refrigerator compartment 9 is reduced according to the temperature difference. At this time, if the difference between the freezer compartment temperature and the set temperature is large,
The cool air circulation fan of the freezer continues high-speed operation.

As described above, in this embodiment, when the internal temperature exceeds the set temperature in either one of the first and second target temperature separate chambers 23 and 25, the compressor 69 starts operating, and The evaporators 33 and 35 in the temperature-specific chambers 23 and 25 have substantially the same temperature. At this time, each cooling air circulation fan 3
Since the number of revolutions of 5, 55 is determined according to the temperature of each target temperature separate chamber 23, 25, when the internal temperature is higher than the set value, a quick cooling operation is performed, and when it is within the set range, the cooling operation is performed. ,
By stopping the operation of the cool air circulation fan or performing low-speed operation, it is possible to prevent excessive cooling, maintain a good internal temperature, and prevent unnecessary power consumption of the cool air circulation fan. Can be.

FIG. 15 is a sectional view showing the internal structure of a refrigerator according to the fifteenth embodiment of the present invention. The refrigerator shown in the figure is the same as the refrigerator shown in FIG.
3 and the first cool air circulating fan 35 are provided on the back side of the low temperature chamber 11 constituting the first target temperature separate chamber 23, and other configurations and operations are the same as those shown in FIG. The same applies to the first to fourteenth embodiments related to FIG. In the present embodiment, the flow of the cool air from the first cool air circulation fan 35 rises from the lower side of the first target temperature separate chamber 23 along the back side as shown by an arrow in FIG. And returns to the first evaporator 33.

[0104]

As described above, according to the first aspect of the present invention, an evaporator and a variable capacity cooling air circulating fan are provided for each temperature zone space, and a change in the situation of one temperature zone space is provided. Since the rotation speed of the cool air circulation fan provided in the other temperature zone space or the capacity of the compressor is controlled, there is little temperature fluctuation in the interior of each temperature zone space. Temperature control can be performed, and power can be saved.

According to the second aspect of the present invention, when the compressor is stopped, the cool air circulation fan in the first temperature zone space is operated at the maximum speed to perform defrosting of the evaporator. The heat exchange performance can always be maintained well, and defrosting can be performed in a short time.

According to the third aspect of the present invention, when the compressor is stopped, the cool air circulation fan in the first temperature zone space is operated for a predetermined time to perform defrosting of the evaporator. Thus, waste of power consumption can be prevented, and heat generation can be minimized.

According to the present invention, when the compressor is stopped, the cool air circulating fan in the first temperature zone space is operated based on the detected temperature in the refrigerator until the defrost is completed, thereby performing defrosting of the evaporator. As a result, unnecessary power consumption can be prevented, and heat generation can be reduced.

According to the fifth aspect of the present invention, when the compressor is stopped, the cool air circulation fan in the first temperature zone space is operated until the defrost is completed based on the temperature detected by the defrost sensor to remove the evaporator. Since frost is performed, wasteful consumption of electric power can be prevented, and heat generation can also be prevented.

According to the present invention, the compressor operating temperature range is set for each temperature zone space, and when any of the temperature zone spaces reaches the compressor operating temperature range, the compressor is operated at the maximum. Since the engine is started at the rotation speed and is operated until the deceleration condition is satisfied, the inside of the refrigerator can be cooled quickly, and the temperature in the refrigerator can be favorably maintained.

According to the present invention, when all the internal temperatures are within the compressor operating range, the rotational speed of the compressor is determined based on the internal temperature in the second temperature zone space. In addition, the temperature in the refrigerator can be rapidly cooled to the set temperature, and the preservation of food can be favorably maintained.

According to the present invention, when the cooling load is large after the power is turned on, at least one of the cooling air circulation fans is stopped for a predetermined time, so that the cooling load is reduced.
The compressor can be prevented from being damaged.

According to the ninth aspect of the present invention, at least one cool air circulating fan does not start operating after the compressor is started until the temperature of the evaporator is sufficiently cooled, thereby preventing wasteful power consumption. be able to.

According to the tenth aspect of the present invention, at least one cool air circulating fan does not start operating after the compressor is started until the temperature of the evaporator is sufficiently cooled. Since the cool air circulation fan is operated at the maximum number of revolutions, the inside of the refrigerator can be cooled quickly, and a good temperature inside the refrigerator can be maintained.

According to the eleventh aspect of the present invention, each cool air circulating fan starts operating at the same time as the compressor is started, and the cool air circulating fan operates at the minimum rotation speed until the evaporator temperature becomes low. Power consumption can be prevented.

According to the twelfth aspect of the present invention, when the compressor is operating, the operation of the cool air circulation fan in the temperature zone space in which the door is open is stopped. Power can be saved.

According to the thirteenth aspect of the present invention, when the compressor is stopped, after the door is opened and closed, the cool air circulation fan in the temperature zone in which the door is opened and closed is operated for a predetermined time, so that the temperature distribution in the interior is improved. The internal temperature can be maintained satisfactorily.

According to the fourteenth aspect of the present invention, the rotation speed of each cool air circulation fan is determined by the internal temperature of the temperature zone space or the temperature of the blown air, so that the cooling operation can be performed promptly and appropriately. It is possible to maintain a good internal temperature.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an internal structure of a refrigerator according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a refrigeration cycle of the refrigerator of FIG.

FIG. 3 is a flowchart showing a normal operation of the refrigerator of FIG. 1;

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

FIG. 5 is a flowchart showing the operation of the third embodiment of the present invention.

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

FIG. 7 is a flowchart showing the operation of the fifth embodiment of the present invention.

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

FIG. 9 is a flowchart showing the operation of the eighth embodiment of the present invention.

FIG. 10 is a flowchart showing the operation of the ninth embodiment of the present invention.

FIG. 11 is a flowchart showing the operation of the tenth embodiment of the present invention.

FIG. 12 is a flowchart showing the operation of the eleventh embodiment of the present invention.

FIG. 13 is a flowchart showing the operation of the twelfth embodiment of the present invention.

FIG. 14 is a flowchart showing the operation of the thirteenth embodiment of the present invention.

FIG. 15 is a sectional view showing the internal structure of a refrigerator according to a fifteenth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body 3 Refrigerator 9 Refrigeration room 11 Low temperature room 13 1st freezing room 15 2nd freezing room 17-20 Opening / closing door 21 Insulated partition wall 23 1st target temperature separate room 25 2nd target temperature separate room 33 1st evaporator 35 First cool air circulation fan 53 Second evaporator 55 Second cool air circulation fan 69 Compressor 71 Condenser 73 Drain valve

Claims (14)

[Claims] 1. A refrigerator having a refrigerating cycle in which a refrigerant discharged from a variable capacity compressor passes through a condenser, a throttle valve, and an evaporator, and returns to a compressor again. Divided into multiple temperature zones with different set temperatures, and separate each temperature zone space independently,
An evaporator and a variable capacity cool air circulating fan are provided for each temperature zone space, and the rotation speed of the variable capacity cool air circulating fan provided in another temperature zone space according to a change in one of the plurality of temperature zone spaces or A refrigerator having means for controlling the capacity of a compressor. 2. The plurality of temperature zone spaces have at least a first temperature zone space having a set temperature of 0 ° C. or higher and a second temperature zone space having a set temperature of less than 0 ° C., and when the compressor is stopped. Stop the cool air circulation fan in the second temperature zone space, operate the cool air circulation fan in the first temperature zone space at the maximum rotation speed,
The defrosting of the evaporator in the first temperature zone space is performed, and the energization of the defrost heater provided in the evaporator in the first temperature zone space is performed at the same time when the defrosting of the evaporator in the second temperature zone space starts. The refrigerator according to claim 1, wherein defrosting is performed by performing defrosting. 3. The plurality of temperature zone spaces have at least a first temperature zone space having a set temperature of 0 ° C. or more and a second temperature zone space having a set temperature of less than 0 ° C., and when the compressor is stopped. The cool air circulating fan in the second temperature zone space is stopped, and the cool air circulating fan in the first temperature zone space is operated for a predetermined time, so that the first
The refrigerator according to claim 1, wherein the evaporator in the temperature zone space is defrosted. 4. The plurality of temperature zone spaces have at least a first temperature zone space having a set temperature of 0 ° C. or higher and a second temperature zone space having a set temperature lower than 0 ° C., and when the compressor is stopped. The cool air circulation fan in the second temperature zone space is stopped, and the cool air circulation fan in the first temperature zone space is operated until the detected temperature of the temperature sensor in the first temperature zone space satisfies the defrost termination condition. 2. The refrigerator according to claim 1, wherein the evaporator in the first temperature zone space is defrosted. 5. The plurality of temperature zone spaces have at least a first temperature zone space having a set temperature of 0 ° C. or more and a second temperature zone space having a set temperature of less than 0 ° C., and when the compressor is stopped. The cooling air circulation fan in the second temperature zone space is stopped, and the cooling air circulation fan in the first temperature zone space is operated until the detection temperature of the defrost sensor provided in the first temperature zone space satisfies the defrost termination condition. The refrigerator according to claim 1, wherein the defrosting of the evaporator in the first temperature zone space is performed. 6. A temperature range for operating the compressor is set for each of the temperature zone spaces, and when the temperature of any one of the temperature zone spaces reaches the compressor operating temperature range, the compressor rotates at a maximum speed. 2. The refrigerator according to claim 1, wherein the refrigerator is started up at a number of times, and is operated until a deceleration condition of the compressor is satisfied. 7. The plurality of temperature zone spaces have at least a first temperature zone space having a set temperature of 0 ° C. or higher and a second temperature zone space having a set temperature of less than 0 ° C. 2. The refrigerator according to claim 1, wherein when all of the temperatures in the refrigerator are within the compressor operating range, the rotation speed of the compressor is determined based on the refrigerator temperature in the second temperature zone space. 8. The apparatus according to claim 1, wherein at least one of the cooling air circulation fans provided for each temperature zone space is stopped for a predetermined time when the cooling load is large after the power of the refrigerator body is turned on. Refrigerator. 9. The method according to claim 1, wherein, after starting the compressor, at least one of the cool air circulating fans provided for each of the temperature zone spaces does not start operating until the temperature of the evaporator is sufficiently cooled. The refrigerator according to claim 1, wherein 10. After starting the compressor, at least one of the cool air circulation fans provided for each of the temperature zone spaces does not start operation until the temperature of the evaporator is sufficiently cooled,
2. The refrigerator according to claim 1, wherein after starting the cool air circulation fan, the cool air circulation fan is operated at a maximum rotation speed until a deceleration condition is satisfied. 11. The cooling air circulation fan provided for each temperature zone space starts operating at the same time as the start of the compressor, and the temperature of the evaporator is lower than the internal temperature or the set temperature of each temperature zone space. 2. The refrigerator according to claim 1, wherein the cooling and circulating fan is operated at a minimum rotation speed until the rotation is completed. 12. When the compressor is operating, the operation of the cooling air circulation fan in the temperature zone space where the door is open among the plurality of temperature zone spaces is stopped, and the cooling air circulation in the temperature zone space where the door is not opened. The refrigerator according to claim 1, wherein the operation of only the fan is continued. 13. The refrigerator according to claim 1, wherein when the compressor is stopped, after the door is opened and closed, a cool air circulation fan in a temperature zone space in which the door is opened and closed is operated for a predetermined time. 14. The refrigerator according to claim 1, wherein the rotation speed of the cooling air circulation fan provided for each temperature zone space is determined by the temperature in the refrigerator or the temperature of the blown air in each temperature zone space.