JP2021092349A - refrigerator - Google Patents

Abstract

To provide a refrigerator which can be further improved in cooling control.SOLUTION: A refrigerator according to an embodiment includes a casing, a cooling unit, a compressor, an air-blowing unit, a storage chamber temperature sensor, and a control unit. The casing includes a first storage chamber. The cooling unit is provided in the casing. The compressor supplies a refrigerant to the cooling unit. The air-blowing unit sends air cooled by the cooling unit to the first storage chamber. The storage chamber temperature sensor detects a temperature in the first storage chamber. When the temperature in the first storage chamber rises higher than a predetermined temperature, the control unit executes first cooling control for driving the compressor with capacity lower than a median in a compression capacity range used after a first temperature value based on the detection result of the storage chamber temperature sensor satisfies a first reference and driving the air-blowing unit on the basis of the detection result of the storage chamber temperature sensor until the first temperature value satisfies the first reference.SELECTED DRAWING: Figure 5

Description

Embodiments of the present invention relate to refrigerators.

Refrigerators that perform cooling control based on the detection results of temperature sensors are known. By the way, refrigerators are expected to have further improved cooling control.

Japanese Unexamined Patent Publication No. 2011-64412

An object to be solved by the present invention is to provide a refrigerator capable of further improving cooling control.

The refrigerator of the embodiment includes a housing, a cooling unit, a compressor, a blower unit, a storage room temperature sensor, and a control unit. The housing includes a first storage chamber. The cooling unit is provided in the housing. The compressor supplies a refrigerant to the cooling unit. The blower unit sends the cold air cooled by the cooling unit to the first storage chamber. The storage chamber temperature sensor detects the temperature in the first storage chamber. When the temperature of the first storage chamber rises by a predetermined value or more, the control unit sets the first temperature value until the first temperature value based on the detection result of the storage chamber temperature sensor satisfies the first criterion. A first cooling control that drives the compressor with a low capacity lower than the median compression capacity range used after satisfying one criterion, and drives the blower based on the detection result of the storage chamber temperature sensor. I do.

The front view which shows the refrigerator of an embodiment. FIG. 2 is a cross-sectional view taken along the line F2-F2 of the refrigerator shown in FIG. The figure which shows the structure of the refrigeration cycle apparatus of embodiment. The block diagram which shows the control part of the refrigerator of embodiment. The figure for demonstrating the special cooling mode of an embodiment. The figure which shows an example of the contents of the increase coefficient table for determining the increase width of the compression capacity of a compressor in the 2nd cooling control of an embodiment. In the embodiment, the figure which shows the control example in the case where the load is applied to the 1st storage chamber, and the load is not applied to the 2nd storage chamber. The figure for demonstrating the special cooling mode of the 1st modification of embodiment. The figure for demonstrating the special cooling mode of the 2nd modification of embodiment. The figure for demonstrating the special cooling mode of the 3rd modification of embodiment.

Hereinafter, the refrigerator of the embodiment will be described with reference to the drawings. In the following description, configurations having the same or similar functions are designated by the same reference numerals. Then, the duplicate description of those configurations may be omitted. In this specification, the left and right are defined with reference to the direction in which the user standing in front of the refrigerator sees the refrigerator. In addition, the side closer to the user standing in front of the refrigerator when viewed from the refrigerator is defined as "front", and the side far from the refrigerator is defined as "back".

As used herein, the term "based on XX" means "based on at least XX" and includes the case where it is based on another element in addition to XX. In addition, "based on XX" is not limited to the case where XX is used directly, but also includes the case where XX is calculated or processed. "XX" is an arbitrary element (for example, arbitrary information).

(Embodiment)
[1. Overall configuration of refrigerator]
The refrigerator 1 of the embodiment will be described with reference to FIGS. 1 to 7. First, the overall configuration of the refrigerator 1 will be described. However, the refrigerator 1 does not have to have all of the configurations described below, and some configurations may be omitted as appropriate.

FIG. 1 is a front view showing the refrigerator 1 of the embodiment. FIG. 2 is a cross-sectional view taken along the line F2-F2 of the refrigerator 1 shown in FIG. As shown in FIGS. 1 and 2, the refrigerator 1 includes, for example, a housing 10, a plurality of doors 11, a plurality of shelves 12, a plurality of containers 13, a flow path forming component 14, a cooling unit 15, and a control panel 19. Have.

The housing 10 has an upper wall 21, a lower wall 22, left and right side walls 23, 24, and a rear wall 25.
The upper wall 21 and the lower wall 22 extend substantially horizontally. The left and right side walls 23 and 24 stand upward from the left and right ends of the lower wall 22 and are connected to the left and right ends of the upper wall 21. The rear wall 25 stands upward from the rear end of the lower wall 22 and is connected to the rear end of the upper wall 21.

As shown in FIG. 2, the housing 10 has, for example, an inner box 51, an outer box 52, and a heat insulating portion 53. The inner box 51 is a member that forms the inner surface of the housing 10. The outer box 52 is a member that forms the outer surface of the housing 10. The outer box 52 is formed to be one size larger than the inner box 51, and is arranged outside the inner box 51. A heat insulating portion 53 is provided between the inner box 51 and the outer box 52. The heat insulating portion 53 is a foamed heat insulating material such as urethane foam. The heat insulating portion 53 may include a vacuum heat insulating material.

A plurality of storage chambers 27 are provided inside the housing 10. The plurality of storage chambers 27 include, for example, a refrigerator compartment 27A, a vegetable compartment 27B, an ice making chamber 27C, a small freezing chamber 27D, and a main freezing chamber 27E. In the present embodiment, the refrigerating chamber 27A is arranged at the uppermost part, the vegetable compartment 27B is arranged below the refrigerating chamber 27A, the ice making chamber 27C and the small freezing chamber 27D are arranged below the vegetable chamber 27B, and the ice making chamber 27C and the small freezing chamber 27D are arranged. The main freezing chamber 27E is arranged below the small freezing chamber 27D. However, the arrangement of the storage chamber 27 is not limited to the above example, and for example, the arrangement of the vegetable chamber 27B and the main freezing chamber 27E may be reversed, or other arrangements may be made. The housing 10 has an opening on the front side of each storage chamber 27 that allows food to be taken in and out of each storage chamber 27.

Each of the refrigerating chamber 27A and the vegetable compartment 27B is a storage chamber in the refrigerating temperature zone, and is an example of the "first storage chamber". Each of the ice making chamber 27C, the small freezing chamber 27D, and the main freezing chamber 27E is a storage chamber in the freezing temperature zone, and is an example of a “second storage chamber”. However, the storage chamber in the freezing temperature zone may correspond to the "first storage chamber", and the storage chamber in the refrigerating temperature zone may correspond to the "second storage chamber".

The housing 10 has first and second partition portions 28 and 29. The first and second partition portions 28 and 29 are, for example, partition walls along substantially the horizontal direction, respectively. The first partition 28 is located between the refrigerator compartment 27A and the vegetable compartment 27B, and partitions the refrigerator compartment 27A and the vegetable compartment 27B. On the other hand, the second partition 29 is located between the vegetable compartment 27B and the ice making chamber 27C and the small freezing chamber 27D, and partitions the vegetable compartment 27B from the ice making chamber 27C and the small freezing chamber 27D. .. The second partition portion 29 has a heat insulating property.

The openings of the plurality of storage chambers 27 are closed by a plurality of doors 11 so as to be openable and closable. The plurality of doors 11 include, for example, the left and right refrigerating room doors 11Aa and 11Ab that close the opening of the refrigerating room 27A, the vegetable room door 11B that closes the opening of the vegetable room 27B, the ice making room door 11C that closes the opening of the ice making room 27C, and small freezing. Includes a small freezer door 11D that closes the opening of chamber 27D and a main freezer door 11E that closes the opening of the main freezer 27E.

The plurality of shelves 12 are provided in the refrigerator compartment 27A.
The plurality of containers 13 are provided in the refrigerating chamber container 13A (for example, a chilled chamber container) provided in the refrigerating chamber 27A, the first and second vegetable compartment containers 13Ba and 13Bb provided in the vegetable compartment 27B, and the ice making chamber 27C. The ice making chamber container (not shown), the small freezing chamber container 13D provided in the small freezing chamber 27D, and the first and second main freezing chamber containers 13Ea and 13Eb provided in the main freezing chamber 27E are included.

The flow path forming component 14 is arranged in the housing 10. The flow path forming component 14 includes a first duct component 31 and a second duct component 32.

The first duct component 31 is provided along the rear wall 25 of the housing 10 and extends in the vertical direction. The first duct component 31 extends from the rear of the lower end of the vegetable compartment 27B to the rear of the upper end of the refrigerator compartment 27A, for example. A first duct space D1, which is a passage through which cold air (air) flows, is formed between the first duct component 31 and the rear wall 25 of the housing 10. The first duct component 31 has a plurality of cold air outlets 31a and a cold air return port 31b. The plurality of cold air outlets 31a are provided at a plurality of height positions in the refrigerating chamber 27A. The cold air return port 31b is provided at the lower end of the first duct component 31 and is located behind the vegetable compartment 27B.

The second duct component 32 is provided along the rear wall 25 of the housing 10 and extends in the vertical direction. The second duct component 32 extends from the rear of the main freezing chamber 27E to the rear of the upper ends of the ice making chamber 27C and the small freezing chamber 27D, for example. A second duct space D2, which is a passage through which cold air (air) flows, is formed between the second duct component 32 and the rear wall 25 of the housing 10. The second duct component 32 has a cold air outlet 32a and a cold air return port 32b. The cold air outlet 32a is provided at the upper end of the second duct component 32 and is located behind the ice making chamber 27C and the small freezing chamber 27D. The cold air return port 32b is provided at the lower end of the second duct component 32 and is located behind the main freezing chamber 27E.

The cooling unit 15 includes a first cooling module 40, a second cooling module 45, and a refrigerating cycle device 70 (see FIG. 3) that cools the first cooling module 40 and the second cooling module 45 by circulating a refrigerant. Including.

The first cooling module 40 includes, for example, a first cooler 41 and a first fan 43. The first cooler 41 is arranged in the first duct space D1. The first cooler 41 is arranged at a height corresponding to the lower end portion of the refrigerating chamber 27A, for example. The first cooler 41 is supplied with a refrigerant compressed by a compressor 17, which will be described later, and cools the cold air flowing through the first duct space D1.

The first fan 43 is provided, for example, at the cold air return port 31b of the first duct component 31. When the first fan 43 is driven, the air in the vegetable compartment 27B flows into the first duct space D1 from the cold air return port 31b. The air that has flowed into the first duct space D1 flows upward in the first duct space D1 and is cooled by the first cooler 41. The cold air cooled by the first cooler 41 is blown out to the refrigerating chamber 27A from the plurality of cold air outlets 31a. The cold air blown out to the refrigerating chamber 27A flows through the refrigerating chamber 27A, passes through the vegetable compartment 27B, and returns to the cold air return port 31b again. As a result, the cold air flowing through the refrigerating chamber 27A and the vegetable compartment 27B is circulated in the refrigerator 1, and the refrigerating chamber 27A and the vegetable compartment 27B are cooled. The first fan 43 is an example of the “first blower”.

On the other hand, the second cooling module 45 includes, for example, a second cooler 46 and a second fan 48. The second cooler 46 is arranged in the second duct space D2. The second cooler 46 is supplied with a refrigerant compressed by a compressor 17, which will be described later, and cools the cold air flowing through the second duct space D2.

The second fan 48 is provided, for example, at the cold air return port 32b of the second duct component 32. When the second fan 48 is driven, the air in the main freezing chamber 27E flows into the second duct space D2 from the cold air return port 32b. The air that has flowed into the second duct space D2 flows upward in the second duct space D2 and is cooled by the second cooler 46. The cold air cooled by the second cooler 46 flows into the ice making chamber 27C, the small freezing chamber 27D, and the main freezing chamber 27E from the cold air outlet 32a. The cold air that has flowed into the ice making chamber 27C and the small freezing chamber 27D flows through the ice making chamber 27C and the small freezing chamber 27D, and then returns to the cold air return port 32b via the main freezing chamber 27E. As a result, the cold air flowing in the ice making chamber 27C, the small freezing chamber 27D, and the main freezing chamber 27E is circulated in the refrigerator 1, and the ice making chamber 27C, the small freezing chamber 27D, and the main freezing chamber 27E are cooled. The second fan 48 is an example of a “second blower”.

In the present embodiment, an example of the "cooling unit" is configured by the first cooler 41 and the second cooler 46. Similarly, the first fan 43 and the second fan 48 form an example of the "blower".

The compressor 17 is provided, for example, in the machine room at the bottom of the refrigerator 1. The compressor 17 compresses the refrigerant gas used for cooling the storage chamber 27. The refrigerant gas compressed by the compressor 17 is sent to the first and second coolers 41 and 46 via a condenser 71 and the like, which will be described later.

The control panel 19 is provided on, for example, the upper wall 21 of the housing 10. In the present embodiment, the upper surface of the upper wall 21 of the housing 10 has a recess 84 recessed downward. The control panel 19 is arranged in the recess 84. The control panel 19 will be described in detail later.

[2. Refrigeration cycle device]
The refrigerator 1 configured as described above is cooled by the refrigeration cycle device 70 controlled by the control unit 100 described later.

[2.1. Configuration of refrigeration cycle equipment]
FIG. 3 is a diagram showing the configuration of the refrigeration cycle device 70. The refrigeration cycle device 70 includes a compressor 17, a condenser 71, a dryer 72, a three-way valve 73, capillary tubes 74 and 75, a first cooler 41, and a second cooler 46 in the order of refrigerant flow. Are connected in a ring shape. A condenser 71 and a dryer 72 are sequentially connected to the high-pressure discharge port of the compressor 17 via a connecting pipe 76. A three-way valve 73 is connected to the discharge side of the dryer 72. The three-way valve 73 has one inlet and two outlets to which the dryer 72 is connected. Of the two outlets of the three-way valve 73, the refrigerating-side capillary tube 74 and the first cooler 41 are connected in order to one of the outlets. The first cooler 41 is connected to the compressor 17 via a refrigerating side suction pipe 77, which is a connecting pipe.

Of the two outlets of the three-way valve 73, the refrigerating side capillary tube 75 and the second cooler 46 are connected in order to the other outlet. The second cooler 46 is connected to the compressor 17 via a freezing side suction pipe 78 which is a connecting pipe. A check valve 79 is provided between the second cooler 46 and the compressor 17 to prevent the refrigerant from the first cooler 41 from flowing back to the second cooler 46 side.

[2.2. Refrigerant flow in refrigeration cycle equipment]
Next, the flow of the refrigerant in the refrigeration cycle device 70 will be described. First, the refrigerant circulating in the refrigeration cycle device 70 is compressed by the compressor 17 to become a high-temperature, high-pressure gaseous refrigerant, which flows through the flow path A. The gaseous refrigerant is dissipated by the condenser 71 to become a medium-temperature, high-pressure liquid refrigerant. After that, the liquid refrigerant from which impurities such as dirt and moisture have been removed through the dryer 72 enters the refrigerating side capillary tube 74 (or the freezing side capillary tube 75) while being throttle-controlled by the three-way valve 73. At this time, the medium-temperature and high-pressure liquid refrigerant in the refrigerating-side capillary tube 74 (or refrigerating-side capillary tube 75) is depressurized while exchanging heat with the refrigerant in the refrigerating-side suction pipe 77 (or refrigerating-side suction pipe 78). .. Then, this refrigerant evaporates while passing through the first cooler 41 (or the second cooler 46), and the inside of the first cooler 41 (or the second cooler 46) is cooled. After that, the low-temperature, low-pressure gaseous refrigerant flows into the refrigerating side suction pipe 77 (or the freezing side suction pipe 78). At this time, the temperature of the refrigerant gas immediately after flowing from the first cooler 41 (or the second cooler 46) into the refrigerating side suction pipe 77 (or the freezing side suction pipe 78) is as low as about −10 ° C. However, this refrigerant gas exchanges heat with the refrigerant in the capillary tube 74 (or capillary tube 75) while passing through the suction pipe 77 (or suction pipe 78), and is finally heated to about room temperature. To. Then, this refrigerant gas is sucked into the compressor 17 again, and the circulation of the refrigerant is completed.

In the refrigeration cycle device 70 described above, the three-way valve 73 is controlled by the control unit 100 (see FIG. 4), and one or both of the flow path B and the flow path C are selected. The flow path B is a flow path for supplying the refrigerant to the first cooler 41 in order to cool the first storage chamber (refrigerator room 27A, vegetable room 27B), while the flow path C is the second storage room (flow path C). This is a flow path for supplying the refrigerant to the second cooler 46 in order to cool the ice making chamber 27C, the small freezing chamber 27D, and the main freezing chamber 27E). These two flow paths merge at the confluence D, and the refrigerant flows from the confluence D in the direction of arrow E and returns to the compressor 17.

[3. control]
FIG. 4 is a block diagram showing a control unit 100 of the refrigerator 1 of the embodiment. The control panel 19 includes a control unit 100 composed of a computer having a microcomputer, a timer, and the like, and controls the entire refrigerator 1. First storage room temperature sensor 110, second storage room temperature sensor 112, first cooler temperature sensor 113, second cooler temperature sensor 114, storage unit 116, compressor 17, three-way valve 73, first fan 43, first The 2 fans 48 and the operation panel unit 150 are connected to the control unit 100, respectively, and are controlled by commands from the control unit 100.

The first storage chamber temperature sensor 110 is provided in the first storage chamber and detects the air temperature in the first storage chamber. The air temperature in the first storage chamber detected by the first storage chamber temperature sensor 110 is an example of the “temperature of the first storage chamber”. Similarly, the second storage chamber temperature sensor 112 is provided in the second storage chamber and detects the air temperature in the second storage chamber. The air temperature in the second storage chamber detected by the second storage chamber temperature sensor 112 is an example of the “second storage chamber temperature”. The first storage chamber temperature sensor 110 and the second storage chamber temperature sensor 112 each include, for example, a thermistor. In the present embodiment, the first storage chamber temperature sensor 110 and the second storage chamber temperature sensor 112 constitute an example of the “storage chamber temperature sensor”.

The first cooler temperature sensor 113 is attached to the first cooler 41 and detects the temperature of the first cooler 41. The second cooler temperature sensor 114 is attached to the second cooler 46 and detects the temperature of the second cooler 46. The first cooler temperature sensor 113 and the second cooler temperature sensor 114 each include, for example, a thermistor. In the present embodiment, the first cooler temperature sensor 113 and the second cooler temperature sensor 114 constitute an example of the “cooling unit temperature sensor”.

In order to perform the refrigerating operation for cooling the first storage chamber, the control unit 100 cools the first cooler 41 by switching the three-way valve 73 and switching the flow path of the refrigerant to the flow path B. Further, in order to perform the freezing operation for cooling the second storage chamber, the control unit 100 cools the second cooler 46 by switching the three-way valve 73 and switching the flow path of the refrigerant to the flow path C. When both the flow path B and the flow path C are selected, both the refrigeration operation and the freezing operation are performed at the same time.

The control unit 100 controls the cooling unit 15 so that the first storage chamber and the second storage chamber are maintained in their respective set temperature zones by, for example, alternately performing a refrigerating operation and a freezing operation. The control unit 100 performs the refrigerating operation and the refrigerating operation according to one of the normal cooling mode and the special cooling mode described below.

The storage unit 116 stores information necessary for operating the refrigerator 1. The storage unit 116 stores a first reference, a second reference, a third reference, an increase coefficient table, and the like, which will be described later.

The operation panel unit 150 accepts an operation for switching the set temperature zone and the operation mode of each storage chamber 27, and displays the setting content and the current operation status. The operation panel unit 150 is, for example, a so-called touch-type operation panel unit. The touch-type operation panel unit includes a touch sensor composed of a capacitive switch.

Here, the "set temperature zone" is a temperature zone that is a target for maintaining the temperature in the storage chamber 27. The set temperature range of the first storage chamber is, for example, 1 ° C. to 4 ° C. The set temperature range of the second storage chamber is, for example, -18 ° C to -21 ° C. On the other hand, the target temperature (cooling target temperature) is the target temperature for cooling the storage chamber 27 in each refrigerating operation or refrigerating operation. The target temperature is set, for example, to the lower limit of the set temperature zone.

In the refrigerating operation, when the temperature of the first storage chamber reaches the lower limit value (target temperature) of the set temperature zone of the first storage chamber, the control unit 100 ends the refrigerating operation and starts the refrigerating operation. In place of / in addition to the above, the control unit 100 determines that the temperature of the second storage chamber rises to the upper limit of the set temperature zone of the second storage chamber during the refrigerating operation, or the previous time of the second storage chamber. When the elapsed time from the end of cooling of the above exceeds a preset time (for example, 20 minutes), the refrigerating operation may be ended and the freezing operation may be started.

On the other hand, in the freezing operation, when the temperature of the second storage chamber reaches the lower limit value (target temperature) of the set temperature zone of the second storage chamber, the control unit 100 ends the freezing operation and starts the refrigerating operation. .. In place of / in addition to the above, the control unit 100 determines that the temperature of the first storage chamber rises to the upper limit of the set temperature zone of the first storage chamber during the freezing operation, or the previous time of the first storage chamber. When the elapsed time from the end of cooling of the above exceeds a preset time (for example, 40 minutes), the freezing operation may be ended and the refrigerating operation may be started. By repeating the above control, the control unit 100 prevents the temperature of the first storage chamber and the temperature of the second storage chamber from deviating significantly from the respective set temperature zones.

[3.1. Normal cooling mode]
The normal cooling mode is a cooling mode in which the larger the difference between the temperature of the storage chamber 27 and the target temperature of the storage chamber 27, the larger the control amount of the cooling unit 15 (for example, the operating frequency of the compressor 17). That is, in the refrigerating operation in the normal cooling mode, the control unit 100 compresses the temperature of the first storage chamber detected by the first storage chamber temperature sensor 110 so as to be a preset target temperature of the first storage chamber. Feedback control (for example, PID (Proportional-Integral-Differential) control) is performed on the operating frequency of the machine 17. That is, the control unit 100 drives the compressor 17 at a higher operating frequency as the difference value between the temperature of the first storage chamber and the target temperature of the first storage chamber becomes larger. At this time, the first fan 43 is controlled by the control unit 100 so that the rotation speed of the first fan 43 increases as the operating frequency of the compressor 17 increases.

Similarly, in the refrigerating operation in the normal cooling mode, the control unit 100 sets the temperature of the second storage chamber detected by the second storage chamber temperature sensor 112 to be a preset target temperature of the second storage chamber. Feedback control (for example, PID control) is performed on the operating frequency of the compressor 17. That is, the control unit 100 drives the compressor 17 at a higher operating frequency as the difference value between the temperature of the second storage chamber and the target temperature of the second storage chamber becomes larger. At this time, the second fan 48 is controlled by the control unit 100 so that the rotation speed of the second fan 48 also increases as the operating frequency of the compressor 17 increases.

In the normal cooling mode, the operating frequency of the compressor 17 is feedback-controlled based on the air temperature detected by the temperature sensor, so that the storage chamber 27 is quickly cooled in response to the load applied to the storage chamber 27. be able to. On the other hand, in the normal cooling mode, power consumption may increase due to the characteristics of feedback control.

[3.2. Special cooling mode]
The special cooling mode is, for example, a cooling mode executed when the temperature of the storage chamber 27 rises by a predetermined value or more. Note that "the temperature of the storage chamber 27 rises by a predetermined value or more" may mean, for example, that the temperature of the storage chamber 27 becomes equal to or higher than a preset threshold value, and the temperature rise width of the storage chamber 27 is a preset threshold value. The difference value between the temperature of the storage chamber 27 and the temperature of the first cooler 41 (or the second cooler 46) may be greater than or equal to the threshold value. It should be noted that "when the temperature of the storage chamber 27 rises by a predetermined value or more" may be referred to as "when the temperature of the storage chamber 27 deviates from the first reference described later on the high temperature side".

In the present embodiment, the control unit 100 monitors the detection results of the storage chamber temperature sensors 110 and 112 and the cooler temperature sensors 113 and 114 at predetermined cycles (for example, every minute), and the temperature of the storage chamber 27 is equal to or higher than the predetermined temperature. When it is detected that the temperature has increased, the special cooling mode is started (that is, the first cooling control described later is started). However, the special cooling mode is not limited to the one that is started when the temperature of the storage chamber 27 is detected to rise by a predetermined value or more. The special cooling mode may be realized as a result (realized without performing a special determination process for starting) by raising the temperature of the storage chamber 27 while a certain control algorithm is being executed. This content will be described later.

FIG. 5 is a diagram for explaining the special cooling mode of the present embodiment. (A) in FIG. 5 shows the change in the temperature of the first storage chamber. (B) in FIG. 5 shows the operating frequency of the compressor 17. (C) in FIG. 5 shows the rotation speed of the first fan 43. (D) in FIG. 5 shows the rotation speed of the second fan 48. In FIG. 5, each of the periods (1) to (6) is a period during which the refrigerating operation is performed. On the other hand, in FIG. 5, the period other than the periods (1) to (6) is the period during which the freezing operation is performed. These definitions are the same in the following figures. FIG. 5 shows an example in which the doors of the first storage chamber and the second storage chamber are opened at time tx, respectively, and a load (food or the like) is applied to both the first storage chamber and the second storage chamber. In addition, in (c) and (d) in FIG. 5, the rotation speeds of the first fan 43 and the second fan 48 are shown to be constant during each refrigerating operation and refrigerating operation, but they are actually. May be changed according to the temperature change during each refrigerating operation and refrigerating operation. When the first storage chamber and the second storage chamber are cooled alternately, if one storage chamber is efficiently cooled (in a short period of time) in the special cooling mode, the time when the other storage chamber is not cooled is short. Since the room is less likely to become slimy, the time required to cool the other storage room gradually decreases. Therefore, as shown in FIG. 5, the length between t1-t2, the length between t3-t4, the length between t5-t6, the length between t7-t8, and the length between t9-t10 are , Gradually shorten. Further, the length between t2-t3, the length between t4-t5, the length between t6-t7, the length between t8-t9, and the length between t10-t11 gradually become shorter.

In at least a part of the special cooling mode, the compression capacity of the compressor 17 is set regardless of the difference value between the temperature of the storage chamber 27 and the target temperature of the storage chamber 27. In the special cooling mode, the control unit 100 drives the compressor 17 with a predetermined low capacity when the temperature of the storage chamber 27 rises significantly (S1 in FIG. 5), and the compression capacity of the compressor 17. (S2 in FIG. 5), a third cooling control that maintains the compressor 17 at a high capacity (S3 in FIG. 5), and drives the compressor 17 at a predetermined low capacity. The fourth cooling control (S4 in FIG. 5) is performed in this order. Here, first, the first to fourth cooling controls relating to the first storage chamber will be described.

[3.1.1. 1st cooling control]
In the first cooling control, the control unit 100 performs the compressor 17 with a predetermined low capacity until the first temperature value (first temperature index value) based on the detection result of the first storage chamber temperature sensor 110 satisfies the first criterion. The first fan 43 is driven based on the detection result of the first storage chamber temperature sensor 110.

An example of the "first temperature value" is the temperature of the first storage chamber itself detected by the first storage chamber temperature sensor 110. However, the "first temperature value" is not limited to the above example, and may be an index value that reflects the temperature change of the first storage chamber. The "first temperature value" is, for example, a value obtained based on the detection result of the first storage chamber temperature sensor 110 and the detection result of the first cooler temperature sensor 113 (for example, the temperature of the first storage chamber and the first cooling). The difference value from the temperature of the vessel 41) may be used.

The "first reference" is a reference set in advance as a condition for switching from the first cooling control to the second cooling control. The "first criterion" is, for example, a criterion that is satisfied when the start of cooling occurs after a predetermined temperature rise. As the "first reference", for example, a change in the first temperature value is detected every minute, a decrease in the first temperature value is detected after a predetermined temperature rise, and a temperature in the first storage chamber is predetermined. The temperature drops to a temperature range (for example, 5 ° C or higher and 12 ° C or lower), and the temperature of the first storage chamber becomes a predetermined temperature range (for example, 5 ° C or higher and 12 ° C or lower) at the end of cooling of a certain refrigerating operation. In addition, one or more of those in the range of 12 ° C. or lower) are set. The conditions of the first standard (first standard for the first storage room) regarding the first storage room (for example, the temperature value or temperature range determined to satisfy the first standard) and the first regarding the second storage room. The conditions of the criteria (first criteria for the second storage chamber) (eg, temperature values or temperature ranges determined to meet the first criteria) may be different from each other. This also applies to the second and third criteria.

The “predetermined low capacity” is, for example, a low capacity lower than the median compression capacity range of the compressor 17 used after the first temperature value satisfies the first criterion. In the example shown in FIG. 5, the compression capacity range of the compressor 17 used after the first temperature value satisfies the first criterion (that is, the compressor 17 used in the second to fourth cooling controls described later). The compression capacity range) is 20 Hz to 45 Hz. Therefore, the median value of the compression capacity range is 32.5 Hz. The control unit 100 drives the compressor 17 with a low capacity lower than 32.5 Hz in the first cooling control. In the example shown in FIG. 5, the control unit 100 drives the compressor 17 at 16 Hz.

Furthermore, the "predetermined low capacity" is a value closer to the lowest value (for example, 20 Hz) of the above-mentioned compression capacity range than the median value (for example, 32.5 Hz) of the above-mentioned compression capacity range. In the present embodiment, the control unit 100 drives the compressor 17 in the first cooling control with a low capacity even lower than the minimum value (for example, 20 Hz) of the compression capacity range. The operating frequency of the compressor 17 is an example of "compressor capacity" and an example of "compressor control amount".

In the first cooling control, the control unit 100 drives the first fan 43 based on the detection result of the first storage chamber temperature sensor 110. For example, the control unit 100 increases the rotation speed of the first fan 43 in the first cooling control as the temperature rise in the first storage chamber increases.

In the present embodiment, the control unit 100 determines the rotation speed of the first fan 43 based on the detection result of the first storage chamber temperature sensor 110 and the detection result of the first cooler temperature sensor 113. For example, the control unit 100 increases the rotation speed of the first fan 43 as the difference value between the temperature of the first storage chamber and the temperature of the first cooler 41 increases. For example, the control unit 100 sets the temperature of the first storage chamber and the temperature of the first cooler 41 based on the difference value between the temperature of the first storage chamber and the temperature of the first cooler 41 being 1 ° C. Every time the difference value of is 1 ° C. larger than the above reference, the predetermined number of rotations (for example, 400 rpm) is increased. The method of setting the rotation speed of the first fan 43 described here is not limited to the first cooling control, but is the same for the second to fourth cooling controls. That is, in each of the second to fourth cooling controls, the control unit 100 increases the rotation speed of the first fan 43 as the difference value between the temperature of the first storage chamber and the temperature of the first cooler 41 increases. To do. The rotation speed of the first fan 43 in the special cooling mode is set independently of the operating frequency of the compressor 17.

The method of setting the rotation speed of the first fan 43 in the first cooling control is not limited to the above example. For example, in the first cooling control, the control unit 100 sets the first fan 43 at a rotation speed higher than the median speed range of the first fan 43 used after the first temperature value satisfies the first criterion. It may be driven. In the example shown in FIG. 5, the rotation speed of the first fan 43 used after the first temperature value satisfies the first criterion (that is, the first fan 43 used in the second to fourth cooling controls described later). (Rotation speed) is from 1300 rpm to 2300 rpm. Therefore, the median value of the rotation speed range is 1800 rpm. The control unit 100 drives the first fan 43 at a rotation speed higher than 1800 rpm in the first cooling control. In the example shown in FIG. 5, the control unit 100 drives the first fan 43 at 2500 rpm. For example, the rotation speed of the first fan 43 in the first cooling control may be a preset fixed value regardless of the temperature of the first storage chamber (or the temperature of the first cooler 41). This also applies to the second to fourth cooling controls.

[3.1.2. 2nd cooling control]
When the first criterion is satisfied, the control unit 100 ends the first cooling control and starts the second cooling control. In the second cooling control, the control unit 100 gradually increases the compression capacity of the compressor 17. For example, the control unit 100 sets the operating frequency of the compressor 17 of the first refrigerating operation (refrigerating operation of the period (2) in FIG. 5) in the second cooling control as the operating frequency of the compressor 17 of the refrigerating operation of the first cooling control. A higher operating frequency (for example, 29 Hz) is set as compared with the operating frequency (for example, 16 Hz). Further, the control unit 100 sets the operating frequency of the compressor 17 in the second refrigerating operation (period (3) in FIG. 5) in the second cooling control as the operating frequency of the compressor 17 in the first refrigerating operation in the second cooling control. Set an operating frequency (for example, 42 Hz) higher than the operating frequency.

The control unit 100 determines the increase width Δf of the compression capacity of the compressor 17, which is gradually increased by the second cooling control, based on the degree of increase in the first temperature value detected before the start of the second cooling control. To do. For example, the control unit 100 increases the increase width Δf of the compression capacity per time in the second cooling control as the increase in the first temperature value detected before the start of the second cooling control increases. In the present embodiment, the control unit 100 sets the "degree of increase in the first temperature value detected before the start of the second cooling control" as "the degree of increase in the first temperature value detected before the start of the second cooling control" at the end of the first cooling control (that is, at the start of the second cooling control). ), The increase width Δf of the compression capacity of the compressor 17 to be gradually increased by the second cooling control is determined based on the magnitude of the first temperature value.

FIG. 6 is a diagram showing an increase coefficient table for determining the increase width Δf of the compression capacity of the compressor 17 which is gradually increased by the second cooling control. For example, when the first temperature value T at the end of the first cooling control is higher than 11 ° C. and is 12 ° C. or lower, the control unit 100 derives 2.5 as an increase coefficient, and during the first cooling control. 40 Hz obtained by multiplying the operating frequency of the compressor 17 by 2.5 is defined as the increase width Δf per time of the compression capacity of the compressor 17 which is gradually increased by the second cooling control. Similarly, when the first temperature value T at the end of the first cooling control is higher than 10 ° C. and is 11 ° C. or lower, the control unit 100 derives 1.75 as an increase coefficient and performs the first cooling control. The 28 Hz obtained by multiplying the operating frequency of the compressor 17 at the time by 1.75 is defined as the increase width Δf per time of the compression capacity of the compressor 17 which is gradually increased by the second cooling control. The same applies when the first temperature value T at the end of the first cooling control indicates another temperature. The increase width Δf of the compression capacity of the compressor 17, which is gradually increased by the second cooling control, may be different in each refrigeration operation.

Next, returning to FIG. 5, the description of the second cooling control will be continued. The control unit 100 continues the second cooling control until the second criterion is satisfied. The "second standard" is a standard set in advance as a condition for switching from the second cooling control to the third cooling control. The "second standard" is, for example, a standard that is satisfied when the temperature drop in the first storage chamber is equal to or higher than a predetermined value. As the "second reference", for example, the temperature of the first storage reaches a predetermined temperature value (for example, 7 ° C.), or a predetermined temperature range (for example, 7 ° C.) from the temperature of the first storage at the start of the second cooling control. ) Either one or more is set, such as a decrease or the temperature at the end of cooling of the refrigerating operation in the second cooling control is a predetermined temperature value (for example, 7 ° C.) or less.

[3.1.3. Third cooling control]
When the second criterion is satisfied, the control unit 100 ends the second cooling control and starts the third cooling control. In the third cooling control, the control unit 100 maintains the compression capacity of the compressor 17 at a predetermined high capacity. The “predetermined high capacity” is, for example, a high capacity closer to the maximum compression capacity during the second cooling control than the low capacity of the compressor 17 in the first cooling control. For example, the "predetermined high capacity" is a high capacity equal to or higher than the final compression capacity of the compressor 17 gradually increased by the second cooling control. The purpose of the third cooling control is, for example, to drive the compressor 17 at a high operating frequency in a state where the cooling efficiency of the compressor 17 is good to cool the first storage chamber. The third cooling control is executed, for example, in a plurality of refrigerating operations.

The control unit 100 continues the third cooling control until the third criterion is satisfied. The "third standard" is a standard set in advance as a condition for switching from the third cooling control to the fourth cooling control. The "third standard" is a standard that is satisfied when the first storage chamber is cooled to near the target temperature of the first storage chamber. As the "third reference", for example, the difference value between the temperature of the first storage chamber and the target temperature of the first storage chamber is set to be equal to or less than a threshold value (for example, 0.5 ° C. or less).

[3.1.4. 4th cooling control]
When the third criterion is satisfied, the control unit 100 ends the third cooling control and starts the fourth cooling control. In the fourth cooling control, the control unit 100 drives the compressor 17 with a predetermined low capacity. That is, the control unit 100 drives the compressor 17 by reducing the compression capacity of the compressor 17 from the high capacity of the third cooling control before the temperature of the first storage chamber reaches the target temperature of the first storage chamber. To do.

The "predetermined low capacity" in the fourth cooling control may be the same as or different from the "predetermined low capacity" in the first cooling control. The "predetermined low capacity" in the fourth cooling control is, for example, a low capacity lower than the median compression capacity range of the compressor 17 used after the first temperature value satisfies the first criterion. In the present embodiment, the control unit 100 drives the compressor 17 at 20 Hz in the fourth cooling control.

Next, the first to fourth cooling controls relating to the second storage chamber will be described. The first to fourth cooling controls for the second storage chamber are the same as the first to fourth cooling controls for the first storage chamber. Therefore, in the first to fourth cooling controls relating to the second storage chamber, in the first to fourth cooling controls described above, "first storage chamber" is read as "second storage chamber", and "first cooling" is used. "Vessel 41" is read as "second cooler 46", "first fan 43" is read as "second fan 48", and "first storage chamber temperature sensor 110" is read as "second storage chamber temperature sensor 112". It may be read as "first cooler temperature sensor 113" as "second cooler temperature sensor 114" and "first temperature value" as "second temperature value".

An example of the "second temperature value (second temperature index value)" is the temperature of the second storage chamber itself detected by the second storage chamber temperature sensor 112. However, the "second temperature value" is not limited to the above example, and may be an index value that reflects the temperature change in the second storage chamber. The "second temperature value" is, for example, a value obtained based on the detection result of the second storage chamber temperature sensor 112 and the detection result of the second cooler temperature sensor 114 (for example, the temperature of the second storage chamber and the second cooling). The difference value from the temperature of the vessel 46) may be used.

In addition, the "first standard" regarding the first storage chamber and the "first standard" regarding the second storage chamber may be different from each other as specific temperatures. That is, the first temperature value when the first criterion is satisfied for the first storage chamber and the second temperature value when the first criterion is satisfied for the second storage chamber may be different from each other. This also applies to the second and third criteria.

In the present embodiment, the operating frequency of the compressor 17 in the refrigerating operation and the operating frequency of the compressor 17 in the freezing operation are calculated separately. Further, the rotation speed of the first fan 43 in the refrigerating operation and the rotation speed of the second fan 46 in the refrigerating operation are calculated separately. Therefore, when the doors of the first storage chamber and the second storage chamber are opened and a load (food, etc.) is applied to both the first storage chamber and the second storage chamber, a control example shown in FIG. However, when a load is applied to only one of the first storage chamber and the second storage chamber, another control example is obtained.

For example, when the temperature rise occurs in only one of the first storage chamber and the second storage chamber, the control unit 100 refers to the storage chamber in which the temperature rise occurs in the first storage chamber and the second storage chamber. Cooling is performed in the special cooling mode (cooling by the first to fourth cooling controls), and the storage chambers of the first storage chamber and the second storage chamber where the temperature does not rise are cooled by the special cooling mode. (Cooling by the first to fourth cooling controls) is suppressed. As used herein, the term "suppressing" is not limited to not performing cooling in the special cooling mode, but is specifically performed for the storage chamber of the first storage chamber and the second storage chamber in which the temperature rises. This includes the case where the special cooling mode is performed at a temperature lower than that of the cooling mode (contents close to the normal cooling mode). In the present embodiment, when the temperature of the control unit 100 rises in only one of the first storage chamber and the second storage chamber, the temperature rise occurs in the first storage chamber and the second storage chamber. The storage chamber is cooled by the special cooling mode (cooling by the first to fourth cooling controls), and the storage chamber where the temperature does not rise is cooled by the normal cooling mode.

FIG. 7 is a diagram showing a control example when a load is applied to the first storage chamber and no load is applied to the second storage chamber. As shown in FIG. 7, when there is no temperature change in the second storage chamber, the control unit 100 sets the temperature of the second storage chamber and the target of the second storage chamber regardless of the control content for cooling the first storage chamber. The operating frequency of the compressor 17 is determined based on the difference value from the temperature.

[4. advantage]
Hereinafter, advantages regarding the configuration of the embodiment will be described. Hereinafter, for convenience of explanation, the cooling of the first storage chamber will be mainly described, but the same applies to the cooling of the second storage chamber.

Now consider a comparative example refrigerator. The refrigerator of the comparative example feeds back the difference value between the temperature sensor in the storage chamber and the target temperature to determine the compression capacity of the compressor 17. As a result, the higher the temperature of the storage chamber than the target temperature, the faster the cooling can be performed by greatly increasing the compression capacity.

However, in the refrigerator of the above comparative example, since the control does not take into consideration the efficiency of the compressor 17 and the state of the refrigerant, optimum control may not be possible from the viewpoint of energy saving. For example, when a load such as foodstuffs is put into the storage chamber and the temperature of the storage chamber rises, the compressor 17 is driven by raising the operating frequency in the refrigerator of the above comparative example, but the temperature of the storage chamber rises. When the operating frequency of the compressor 17 is increased in the elevated state (that is, the refrigerant vaporizes quickly, the temperature of the refrigerant returning from the cooler to the compressor 17 rises, and the refrigerant expands to increase in volume). , The load on the compressor 17 is large, and the cooling efficiency (power consumption efficiency related to cooling) of the compressor 17 may decrease. That is, if the operating frequency is raised to drive the compressor 17 when the temperature of the storage chamber rises significantly, the energy saving property may decrease.

Therefore, in the present embodiment, when the temperature of the first storage chamber rises by a predetermined value or more, the control unit 100 determines the temperature until the first temperature value based on the detection result of the first storage chamber temperature sensor 110 satisfies the first criterion. The compressor 17 is driven with the low capacity of the above, and the first fan 43 is driven based on the detection result of the first storage chamber temperature sensor 110. According to such a configuration, by performing the first cooling control, even if the temperature of the storage chamber 27 rises significantly due to the loading, the compressor 17 is intentionally operated at a low capacity to increase the cooling efficiency. While maintaining the temperature, the rotation speed of the first fan 43 can be increased according to the temperature of the first storage chamber to compensate for a part of the insufficient cooling. As a result, the first storage chamber can be cooled while suppressing a decrease in the cooling efficiency of the compressor 17, and the energy saving performance can be improved.

In the present embodiment, the control unit 100 increases the rotation speed of the first fan 43 in the first cooling control as the temperature rise in the first storage chamber increases. According to such a configuration, by increasing the rotation speed of the first fan 43 under the condition that the temperature of the first storage chamber is higher than the temperature of the first cooler 41, the cold air circulation is efficiently performed and the temperature at the time of loading is applied. The rise can be further suppressed.

Here, with only the first cooling control, the control unit 100 may delay the cooling time to the target temperature. Therefore, in the present embodiment, after the completion of the first cooling control, the second cooling control for gradually increasing the compression capacity of the compressor 17 is performed. According to such a configuration, for example, the compression capacity of the compressor 17 is increased at the timing when the temperature rise of the storage chamber 27 is settled and the temperature of the storage chamber 27 is lowered, and the cooling rate is weighted for cooling. By performing the above, it is possible to compensate for the cooling performance that is insufficient in the first cooling control. That is, by combining the first cooling control and the second cooling control, it is possible to balance energy saving and cooling performance. Further, in the second cooling control, the cooling efficiency of the compressor 17 can be further improved by increasing the compression capacity of the compressor 17 step by step instead of increasing it all at once.

In the present embodiment, the control unit 100 determines the compression capacity of the compressor 17 that is gradually increased by the second cooling control based on the degree of increase in the first temperature value detected before the start of the second cooling control. Determine the amount of increase. According to such a configuration, by determining the increase range of the cooling capacity of the compressor 17 from the temperature change of the first storage chamber and the like, the first storage is performed within a predetermined cooling time even when various loads are applied. The room temperature can be brought closer to the target temperature.

In the present embodiment, after the end of the second cooling control, the control unit 100 maintains the compression capacity of the compressor 17 at a high capacity closer to the maximum compression capacity in the second cooling control than the low capacity in the first cooling control. The third cooling control is performed. According to such a configuration, the cooling efficiency of the compressor 17 is improved by maintaining a high compression capacity of the compressor 17 in a state where excessive vaporization of the refrigerant is suppressed and the cooler 41 can be effectively used. While the first storage chamber can be finally cooled to the target temperature. As a result, even when the first cooling control is performed, the first storage chamber can be cooled to the target temperature in a relatively short cooling time. Further, the state in which the temperature of the first storage chamber is lowered to some extent is a state in which the temperature of the refrigerant returning from the cooler to the compressor 17 is low and the volume of the refrigerant is relatively small, and the load on the compressor 17 is small. By increasing the operating frequency of the compressor 17 in such a state, the compressor 17 can be used with high cooling efficiency.

Here, since the third cooling control has a high cooling capacity, if the target temperature of the first storage chamber is reached with the third cooling control, the temperature drop of the first storage chamber does not stop immediately even if the cooling is stopped. However, the temperature of the first storage chamber may continue to decrease. Therefore, when the target temperature of the first storage chamber is reached with the third cooling control, the first storage chamber is cooled more than necessary.

Therefore, in the present embodiment, the control unit 100 reduces the compression capacity of the compressor 17 from the high capacity in the third cooling control to compress the compressor 17 before the temperature of the first storage chamber reaches the target temperature of the first storage chamber. The fourth cooling control for driving the machine 17 is performed. According to such a configuration, excess cooling can be suppressed, and the energy saving property of the refrigerator 1 can be further improved.

In the present embodiment, when the temperature rise occurs in only one of the first storage chamber and the second storage chamber, the control unit is a storage chamber in which the temperature rise occurs in the first storage chamber and the second storage chamber. The first to fourth cooling controls are performed only for the above. According to such a configuration, it is possible to determine an appropriate compression capacity of the compressor 17 for each storage chamber according to the load applied to each storage chamber.

Hereinafter, some modifications of the embodiment will be described. The configurations other than those described below are the same as those in the above-described embodiment.

(First modification)
FIG. 8 is a diagram for explaining a special cooling mode of the first modification. In the first modification, the compression capacity of the compressor 17 is gradually reduced in the fourth cooling control. For example, in the control unit 100, the higher the operating frequency of the compressor 17 in the third cooling control, the larger the decrease in the compression capacity per time in the fourth cooling control.

According to such a configuration, the temperature of the storage chamber 27 is more likely to be stable and excess cooling is less likely to occur, as compared with the case where the compression capacity is rapidly reduced from the high capacity.

(Second modification)
FIG. 9 is a diagram for explaining a special cooling mode of the second modification. In the second modification, for example, in each of the first to fourth cooling controls, the control unit 100 determines the degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber, and the temperature of the second storage chamber. When only one of the degree of deviation from the target temperature of the second storage chamber is equal to or more than the threshold value, the storage chamber of the first storage chamber and the second storage chamber whose degree of deviation is less than the above threshold value is cooled. The compression capacity of the compressor 17 is the median value of the compression capacity range of the compressor 17 used after the first temperature value or the second temperature value meets the first criterion in the low capacity range in the first cooling control. Increase at least once in the lower range). The threshold value for the first storage chamber and the threshold value for the second storage chamber may be different from each other. This is the same for all the examples shown below.

From another point of view, the control unit 100 determines the degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber and the degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber in each of the first to fourth cooling controls, for example. When only one of the degree of deviation between the temperature and the target temperature of the second storage chamber is equal to or more than the threshold value, the storage chamber between the first storage chamber and the second storage chamber where the degree of deviation is less than the above threshold value is cooled. The compression capacity of the compressor 17 is gradually increased in the range of the low capacity or in a range closer to the lower capacity than the maximum compression capacity in the second cooling control. For example, the control unit 100 sets the compression capacity of the compressor 17 for cooling the storage chambers of the first storage chamber and the second storage chamber where the degree of deviation is less than the threshold value from the first cooling control described above to the third. It is gradually increased over the period of cooling control.

In the example shown in FIG. 9, the degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber is equal to or higher than the threshold value (for example, 10 ° C. or higher), and the temperature of the second storage chamber and the target of the second storage chamber are targeted. The case where the degree of deviation from the temperature is less than the threshold value is shown. In this case, the control unit 100 increases the compression capacity of the compressor 17 at least once in the cooling of the second storage chamber within the range of the low capacity in the first cooling control for the second storage chamber. In FIG. 9, the period before the period (1) (the period in which the operating frequency of the compressor 17 is about 25 Hz) is a normal state in which the refrigerator 1 is stably operating with the door closed. This definition is the same for the third modification shown in FIG.

According to such a configuration, when a load is applied to the first storage chamber, this control is performed by increasing the compression capacity of the compressor 17 in cooling the second storage chamber within the range of the low capacity. It is possible to shorten the time required for the temperature of the second storage chamber to reach the target temperature of the second storage chamber as compared with the case without it. If the time required for the temperature of the second storage chamber to reach the target temperature of the second storage chamber can be shortened, the freezing operation can be ended early and the refrigerating operation can be restarted. As a result, the temperature of the first storage chamber to which the load is applied rises significantly during the freezing operation while maintaining the cooling efficiency of the compressor 17 high, and as a result, the compressor 17 relating to the cooling of the first storage chamber. It is possible to suppress the need to greatly increase the operating frequency of the.

Here, when a load is applied to the first storage chamber, the cooling of the first storage chamber is prioritized (for example, the switching to the cooling of the second storage chamber is delayed), so that the temperature of the second storage chamber rises. May be done. The control unit 100 may detect the above-mentioned event based on the detection result of the second storage chamber temperature sensor 112, and gradually increase the controlled amount (for example, operating frequency) of the compressor 17 when the second storage chamber is cooled. In the example shown in FIG. 9, the control unit 100 sets the compression capacity of the compressor 17 in a range closer to the lower capacity than the maximum compression capacity in the second cooling control during the period from the first cooling control to the third cooling control. Increase gradually with. As a result, even when cooling of the first storage chamber is prioritized, it is possible to suppress an increase in the temperature of the second storage chamber. In this case as well, the cooling efficiency of the compressor 17 is lowered by suppressing the operation of the compressor 17 to a low level during the period when the temperature of the second storage chamber is likely to rise (the period in which the cooling of the first storage chamber is prioritized). The second storage chamber can be cooled while being suppressed, and the energy saving performance can be improved.

In the above description, the "degree of deviation between the temperature of the storage chamber and the target temperature of the storage chamber" to be compared with the threshold value may be the "temperature of the storage chamber". That is, when only one of the temperature of the first storage chamber and the temperature of the second storage chamber is equal to or higher than the threshold value, the control unit sets the temperature of both the first storage chamber and the second storage chamber to be less than the threshold value. The compression capacity of the compressor 17 for cooling the storage chambers of the first storage chamber and the second storage chamber where the temperature is less than the above threshold value is within the range of the low capacity in the first cooling control. It may be increased. The "degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber" and the "temperature of the first storage chamber" are examples of "values relating to the temperature of the first storage chamber", respectively. Similarly, the "degree of deviation between the temperature of the second storage chamber and the target temperature of the second storage chamber" and the "temperature of the second storage chamber" are examples of "values relating to the temperature of the second storage chamber", respectively. Further, the value to be compared with the threshold value is not limited to the value related to the temperature of the storage chamber, and may be a value estimated by the load applied to the storage chamber 27.

(Third modification example)
FIG. 10 is a diagram for explaining a special cooling mode of the third modification. In the third modification, for example, in each of the first to fourth cooling controls, the control unit 100 determines the degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber, and the temperature of the second storage chamber. When only one of the degree of deviation from the target temperature of the second storage chamber is equal to or more than the threshold value, the degree of deviation between the first storage chamber and the second storage chamber is less than the above threshold value. The cooling time for cooling the storage chamber between the first storage chamber and the second storage chamber in which the degree of deviation is less than the threshold value is shortened.

In the example shown in FIG. 10, the degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber is equal to or higher than the threshold value (for example, 10 ° C. or higher), and the temperature of the second storage chamber and the target of the second storage chamber are targeted. The case where the degree of deviation from the temperature is less than the threshold value is shown. In this case, the control unit 100 shortens the cooling time of the second storage chamber in cooling the second storage chamber. For example, the control unit 100 performs a second storage when the elapsed time from the previous cooling end of the first storage chamber (or the cooling start of the second storage chamber) exceeds a preset predetermined time (for example, 40 minutes). When the setting is made to finish the cooling of the chamber and shift to the cooling of the first storage chamber, the setting of the predetermined time is shortened (for example, set to 30 minutes). Further, instead of the above / in addition to the above, the control unit 100 raises the lower limit value (target temperature for cooling of the second storage chamber) of the set temperature zone of the second storage chamber at least temporarily, so that the second storage chamber can be second. Shorten the cooling time of the storage room.

According to such a configuration, when a high load is applied to the first storage chamber, the cooling time of the second storage chamber can be shortened. That is, the freezing operation can be ended early and the refrigerating operation can be restarted. As a result, the temperature of the first storage chamber to which the load is applied rises significantly during the freezing operation while maintaining the cooling efficiency of the compressor 17 high, and as a result, the operating frequency of the compressor 17 is greatly increased. The need can be suppressed.

Here, when a load is applied to the first storage chamber, the cooling of the first storage chamber is prioritized (for example, the switching to the cooling of the second storage chamber is delayed), so that the temperature of the second storage chamber rises. May be done. Therefore, as shown in FIG. 10, the cooling time of the second storage chamber several times after the load is applied to the first storage chamber requires a certain amount of time. However, after that, since the second storage chamber is sufficiently cooled, the cooling time of the second storage chamber is shortened.

In the above description, the "degree of deviation between the temperature of the storage chamber and the target temperature of the storage chamber" to be compared with the threshold value may be the "temperature of the storage chamber". That is, when only one of the temperature of the first storage chamber and the temperature of the second storage chamber is equal to or higher than the threshold value, the control unit sets the temperature of both the first storage chamber and the second storage chamber to be less than the threshold value. The cooling time for cooling the storage chambers of the first storage chamber and the second storage chamber in which the temperature is less than the above threshold value may be shortened as compared with the case of. The "degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber" and the "temperature of the first storage chamber" are examples of "values relating to the temperature of the first storage chamber", respectively. Similarly, the "degree of deviation between the temperature of the second storage chamber and the target temperature of the second storage chamber" and the "temperature of the second storage chamber" are examples of "values relating to the temperature of the second storage chamber", respectively. Further, the value to be compared with the threshold value is not limited to the value related to the temperature of the storage chamber, and may be a value estimated by the load applied to the storage chamber 27.

The embodiments and some modifications have been described above. However, the embodiments and modifications are not limited to the above examples. For example, the special cooling mode may be executed without detecting whether or not a predetermined condition (for example, the temperature of the storage chamber 27 rises by a predetermined value or more) is satisfied. For example, the refrigerator 1 alternately performs a refrigerating operation and a refrigerating operation, and detects the control content of a certain refrigerating operation (for example, the operating frequency of the compressor 17) during the previous refrigerating operation or the immediately preceding refrigerating operation. It may be decided based on the information provided. In this case, even if a load is applied between the previous refrigerating operation (or the immediately preceding refrigerating operation) and the current refrigerating operation and the temperature of the storage chamber 27 rises significantly, the operation of the compressor 17 in the current refrigerating operation The frequency is set to low capacity. That is, the first cooling control is realized as a result without performing a special determination process for starting the first cooling control. Regarding the details of the refrigerator 1 that determines the control content of a certain refrigerating operation based on the information detected during the previous refrigerating operation or the immediately preceding refrigerating operation, the present inventors in February 2019 It is described in the application manuscript of Japanese Patent Application No. 2019-033286 filed on the 26th. The entire content of this application manuscript is incorporated herein by reference in its entirety.

In the embodiment, not all of the first to fourth cooling controls are indispensable. For example, any one or more of the second to fourth cooling controls (for example, the fourth cooling control, or the third cooling control and the fourth cooling control) may be omitted. Further, instead of performing the second cooling control, the compression capacity of the compressor 17 may be increased at once after the completion of the first cooling control.

Further, in the above-described embodiment, the first cooler 41 for cooling the air sent to the first storage chamber and the second cooler 46 for cooling the air sent to the second storage chamber are separately provided. Instead, one cooler (cooling unit) that cools both the air sent to the first storage chamber and the air sent to the second storage chamber, and the flow path and the first air flow path sent to the first storage chamber. 2 A damper device that switches the flow path of the air sent to the storage chamber and a damper device that switches the flow path to alternately send the air cooled by the cooler to the first storage chamber and the second storage chamber. A blower (common blower) may be provided. Even with such a configuration, the cooling control can be improved by performing the same control as in the above embodiment or the above modification by the control unit 100.

According to at least one embodiment described above, in the control unit of the refrigerator, when the temperature of the first storage chamber rises by a predetermined value or more, the first temperature value based on the detection result of the storage chamber temperature sensor sets the first reference. Until it is satisfied, the compressor is driven with a low capacity lower than the median compression capacity range used after the first temperature value meets the first criterion, and the blower is blown based on the detection result of the storage room temperature sensor. Drive. According to such a configuration, it is possible to further improve the cooling control.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, as well as in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Refrigerator, 17 ... Compressor, 27 ... Storage room, 27A ... Refrigerator room (1st storage room), 27B ... Vegetable room (1st storage room), 27C ... Ice making room (2nd storage room), 27D ... Small Freezer room (second storage room), 27E ... main freezer room (second storage room), 41 ... first cooler, 43 ... first fan (first blower), 46 ... second cooler, 48 ... second Fan (second blower) 100 ... Control unit, 110 ... First storage room temperature sensor, 112 ... Second storage room temperature sensor, 113 ... First cooler temperature sensor, 114 ... Second cooler temperature sensor.

Claims (11)

The housing including the first storage room and
A cooling unit provided in the housing and
A compressor that supplies refrigerant to the cooling unit,
A blower unit that sends the cold air cooled by the cooling unit to the first storage chamber, and
A storage room temperature sensor that detects the temperature in the first storage room, and
When the temperature of the first storage chamber rises by a predetermined value or more, the first temperature value satisfies the first criterion until the first temperature value based on the detection result of the storage chamber temperature sensor satisfies the first criterion. A control unit that drives the compressor with a low capacity lower than the median value of the compression capacity range used later, and performs a first cooling control that drives the blower unit based on the detection result of the storage chamber temperature sensor. ,
Refrigerator equipped with. The control unit increases the rotation speed of the blower unit in the first cooling control as the temperature rise in the first storage chamber increases.
The refrigerator according to claim 1. A cooling unit temperature sensor for detecting the temperature of the cooling unit is further provided.
In the first cooling control, the control unit determines the rotation speed of the blower unit based on the detection result of the storage chamber temperature sensor and the detection result of the cooling unit temperature sensor.
The refrigerator according to claim 1 or 2. After the end of the first cooling control, the control unit performs a second cooling control that gradually increases the compression capacity of the compressor.
The refrigerator according to any one of claims 1 to 3. The control unit increases the compression capacity of the compressor stepwise by the second cooling control based on the degree of increase in the first temperature value detected before the start of the second cooling control. To decide,
The refrigerator according to claim 4. After the end of the second cooling control, the control unit performs a third cooling control for maintaining the compression capacity of the compressor at a high capacity closer to the maximum compression capacity in the second cooling control than the low capacity.
The refrigerator according to claim 4 or 5. The control unit performs a fourth cooling control for driving the compressor by reducing the compression capacity of the compressor from the high capacity before the temperature of the first storage chamber reaches the target temperature.
The refrigerator according to claim 6. The housing includes a second storage chamber.
The storage chamber temperature sensor includes a first storage chamber temperature sensor that detects the temperature in the first storage chamber and a second storage chamber temperature sensor that detects the temperature in the second storage chamber.
The blower includes a first blower that sends the cold air to the first storage chamber and a second blower that sends the cold air to the second storage chamber, or the cold air is sent to the first storage chamber and the second storage chamber. Including a common blower that alternately sends to the room
The control unit
When the temperature of the second storage chamber rises by a predetermined value or more, the second temperature value based on the detection result of the second storage chamber temperature sensor satisfies the first criterion for the second storage chamber. The compressor is driven with a low capacity lower than the median compression capacity range used after the temperature value meets the first criterion for the second storage chamber, and the detection of the second storage chamber temperature sensor. Based on the result, the first cooling control for driving the blower is performed.
When the temperature rise occurs in only one of the first storage chamber and the second storage chamber, the first storage chamber of the first storage chamber and the second storage chamber where the temperature rise occurs is compared with the first storage chamber. 1 Cooling control is performed, and the first cooling control is suppressed for the storage chamber of the first storage chamber and the second storage chamber where the temperature does not rise.
The refrigerator according to any one of claims 1 to 7. The housing includes a second storage chamber.
The control unit has a degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber and the degree of deviation between the temperature of the second storage chamber and the target temperature of the second storage chamber. When only one of them is equal to or more than the threshold value, the compression capacity of the compressor for cooling the storage chamber of the first storage chamber and the second storage chamber where the degree of deviation is less than the threshold value is within the range of the low capacity. Increase at least once,
The refrigerator according to any one of claims 1 to 8. The housing includes a second storage chamber.
The control unit has a degree of deviation between the temperature of the first storage chamber and the target temperature of the first storage chamber and the degree of deviation between the temperature of the second storage chamber and the target temperature of the second storage chamber. When only one of them is equal to or more than the threshold value, the degree of deviation between the first storage chamber and the second storage chamber is less than the threshold value, as compared with the case where the first storage chamber and the second storage chamber are separated from each other. Among them, the cooling time for cooling the storage chamber whose degree of deviation is less than the threshold value is shortened.
The refrigerator according to any one of claims 1 to 9. The housing including the first storage room and
A cooling unit provided in the housing and
A compressor that supplies refrigerant to the cooling unit,
A blower unit that sends the cold air cooled by the cooling unit to the first storage chamber, and
A storage room temperature sensor that detects the temperature in the first storage room, and
When the temperature of the first storage chamber rises by a predetermined value or more, the first temperature value satisfies the first criterion until the first temperature value based on the detection result of the storage chamber temperature sensor satisfies the first criterion. The compressor is driven at a low capacity lower than the median compression capacity range used later, and the first temperature value is higher than the median rotation speed range used after satisfying the first criterion. A control unit that performs the first cooling control that drives the blower unit at the number of revolutions,
Refrigerator equipped with.

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