JP2011153788A - Refrigerator - Google Patents

Abstract

To provide a refrigerator capable of preventing food stored in a storage room from becoming too cold when a door is opened and closed.
In a refrigerator 1, opening / closing of a door 3a of a refrigerator room 3 serving as a storage room is detected by a refrigeration door switch 31, and opening / closing of a door 6a of a freezer room 6 serving as a storage room is detected by a refrigeration door switch 32. To do. The control device drives the compressor 22 with an output based on detection signals of the refrigeration temperature sensor 33 and the refrigeration temperature sensor 34 during normal cooling operation, and supplies the refrigeration chamber 3 with chilled air and the refrigeration cooling fan 13. When the refrigeration cooling fan 19 that supplies cold air to the chamber 6 is driven at a set number of revolutions and it is determined that the doors 3a and 6a are closed based on detection signals from the refrigeration door switch 31 and the refrigeration door switch 32, The refrigeration cooling fan 13 or the refrigeration cooling fan 19 on the side where the door is open is driven for a predetermined time at the rotation speed set at the lower level.
[Selection] Figure 1

Description

  The present invention relates to a refrigerator having a cooling fan that supplies cold air generated by a cooler into a storage chamber.

  Conventionally, in a refrigerator having a cooling fan that supplies cold air generated by a cooler into a storage chamber, when a user opens a door that opens and closes the opening of the storage chamber, the cool air in the storage chamber is released to the outside of the storage chamber. At the same time, warm air outside the refrigerator enters the storage room, and the temperature in the storage room rises. Therefore, a refrigerator having a configuration in which the temperature in the storage chamber does not increase as much as possible when the door is opened and closed has been proposed.

  For example, the refrigerator disclosed in Patent Document 1 adjusts the temperature in the storage chamber by controlling on / off of driving of the cooling fan and the output of the compressor in accordance with opening and closing of the door. That is, in the refrigerator, when the door is closed during normal cooling operation, the compressor is driven with a predetermined output and the cooling fan is driven to supply cool air into the storage chamber to cool the storage chamber. When the door is opened, the refrigerator stops the cooling fan while the door is open to prevent the cool air in the storage chamber from being discharged outside the storage chamber. Further, when the door is subsequently closed, the refrigerator has a compressor output magnitude based on the length of the door closing time before the door is opened and the detection signal of the internal temperature detecting means when the door is closed. Has changed. With this configuration, the storage chamber is cooled quickly after the door is closed.

JP-A-8-271105

  The refrigerator of patent document 1 is driving the compressor with high output, so that the temperature in a storage chamber is high, when a door is closed. Therefore, when warm air temporarily flows into the storage chamber, the refrigerator drives the compressor at a high output when the internal temperature detection means detects the warm air temperature. However, the warm air temporarily flowing into the storage room does not increase the temperature of the stored food itself in the storage room. Therefore, when warm air temporarily flows into the storage room, the internal temperature sensor detects the temperature of the temporary warm air, and when the refrigerator drives the compressor at a high output, the stored food in the storage room cools. There is a bug that will pass.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a refrigerator capable of preventing stored food in a storage room from becoming too cold when the door is opened and closed. That is.

  In order to achieve the above object, the refrigerator of the present invention includes a storage chamber having an opening formed on the front surface, a door that opens and closes the opening of the storage chamber, a door switch that detects opening and closing of the door, Temperature detecting means for detecting the temperature in the storage chamber, a cooler for generating cold air, a compressor that constitutes a refrigeration cycle together with the cooler, and supplying the cool air generated by the cooler to the storage chamber A cooling fan, an operation panel for setting a cooling operation, a control means for controlling driving of the compressor and the cooling fan based on a setting signal from the operation panel, a detection signal of the temperature detection means and the door switch The control means controls the output of the compressor based on the detection signal of the temperature detection means during normal cooling operation and sets the cooling fan to The control is performed with a number, and when the cooling fan is driven, when it is determined that the door is open based on the detection signal of the door switch, the cooling fan is stopped while the door is open. And when it is determined that the door is closed based on the detection signal of the door switch, the cooling fan is controlled to drive at a lower rotation speed for a predetermined time.

  According to the refrigerator of the present invention, since the cooling fan is stopped while the refrigerator door is open, it is possible to prevent the cool air in the storage chamber from being discharged outside the storage chamber as much as possible when the door is open. it can. When the door is closed, the cooling fan is driven at a lower rotation speed, so that the warm air flowing into the storage chamber moves at a low speed in the storage chamber and easily diffuses in the storage chamber. It becomes easy to be cooled by cold air. As a result, the temperature detecting means for detecting the temperature in the storage chamber does not detect the temperature of the warm air when it flows into the storage chamber at once, but detects a temperature lower than the temperature with a time delay. Therefore, after the door is closed, the output of the compressor that is driven based on the temperature in the storage chamber does not become a height corresponding to the temperature of the warm air that flows in, so that the stored food in the storage chamber is too cold. Can be prevented.

The vertical side view of the refrigerator which shows the 1st Embodiment of this invention Schematic diagram showing the outline of the refrigeration cycle Block diagram showing schematic electrical configuration The figure which shows roughly the relationship between the temperature of a freezer compartment and a refrigerator compartment, and the rotation speed of a cooling fan The figure which shows roughly the relationship between the temperature of the freezer compartment and the refrigerator compartment and the output of the compressor Time chart showing the relationship between opening and closing the doors of the freezer and refrigeration rooms, turning on and off the door switches of the freezer and refrigeration rooms, and turning on and off the cooling fans for freezing and refrigeration Flow chart showing control of cooling operation of refrigerator Flow chart showing temperature adjustment determination control Flow chart showing temperature adjustment control FIG. 9 equivalent view showing the second embodiment of the present invention

(First embodiment)
The refrigerator of 1st Embodiment of this invention is demonstrated with reference to FIGS. In FIG. 1, the door side will be described as the front side.
A refrigerator 1 shown in FIG. 1 includes a refrigerator room 3, an ice making room 4, a vegetable room 5, and a freezer room 6 in order from the top as a storage room inside a main body 2. The refrigerated room 3 and the vegetable room 5 are refrigerated temperature spaces that are communicated through a ventilation path (not shown) and the inside temperature is controlled to about 1 to 4 ° C., and constitute a refrigerated temperature zone storage room. The ice making room 4 and the freezing room 6 are communicated through a ventilation path (not shown), and are both freezing temperature spaces in which the internal temperature is lower than the temperature of the storage room in the refrigeration temperature zone, and constitutes a storage room in the freezing temperature zone. Yes.

  Openings are formed on the front surfaces of the refrigerator compartment 3, the ice making compartment 4, the vegetable compartment 5, and the freezer compartment 6, respectively. The opening of the refrigerator 3 is provided with a laterally opening type door 3a that opens and closes the opening, and the opening of the ice making chamber 4 is provided with a drawer-type door 4a that opens and closes the opening. The opening 5 is provided with a drawer-type door 5 a that opens and closes the opening, and the opening of the freezer compartment 6 is provided with a drawer-type door 6 a that opens and closes the opening.

  An operation panel 7 is provided on the front surface of the door 3 a of the refrigerator compartment 3. The operation panel 7 includes a display 8 that displays the temperature of each storage room and the like, and a switch 9 for inputting the setting of cooling operation, the set temperature of each storage room, and the like.

A refrigeration cooler chamber 11 is provided behind the refrigeration chamber 3. As shown in FIG. 2, a refrigerating cooler 12 for generating cold air is provided in the refrigerating cooler chamber 11. Above the refrigeration cooler 12, a refrigeration cooling fan 13 that supplies cold air generated by the refrigeration cooler 12 into the refrigeration chamber 3 and the vegetable compartment 5 is provided.
As shown in FIG. 3, the refrigeration cooling fan 13 has a refrigeration cooling fan motor 13a serving as a drive source. The number of rotations of the refrigeration cooling fan 13 is the magnitude of the number of rotations of the refrigeration cooling fan motor 13a. It is controlled by. The refrigeration cooling fan motor 13a is, for example, a brushless motor, and the rotation speed of the refrigeration cooling fan motor 13a is controlled by the magnitude of the frequency output from the inverter circuit 13b shown in FIG.

  As shown in FIG. 1, a back panel 14 is provided on the back side of the refrigerating chamber 3 and in front of the refrigerating cooling fan 13. The rear panel 14 includes a cold air outlet 15 for supplying the cold air supplied from the refrigeration cooling fan 13 into the refrigeration chamber 3, and the cold air supplied into the refrigeration chamber 3 into the refrigeration cooler chamber 11. A cold air inlet (not shown) for returning is formed. Further, on the side surface of the vegetable room 5, a cold air outlet (not shown) for supplying the cold air from the refrigeration cooling fan 13 into the vegetable room 5, and the cold air supplied into the vegetable room 5 refrigerated cooler room A cold air inlet (not shown) for returning to the inside 11 is formed.

A refrigeration cooler chamber 17 is provided behind the vegetable chamber 5. In the refrigeration cooler chamber 17, as shown in FIG. 2, a refrigeration cooler 18 for generating cold air is provided. Above the refrigeration cooler 18, there is provided a refrigeration cooling fan 19 that supplies the cold air generated by the refrigeration cooler 18 into the ice making chamber 4 and the freezing chamber 6.
As shown in FIG. 3, the refrigeration cooling fan 19 has a refrigeration cooling fan motor 19a serving as a drive source. The number of rotations of the refrigeration cooling fan 19 is the same as the number of rotations of the refrigeration cooling fan motor 19a. It is controlled by. The refrigeration cooling fan motor 19a is, for example, a brushless motor, and the rotation speed of the refrigeration cooling fan motor 19a is controlled by the magnitude of the frequency output from the inverter circuit 19b shown in FIG.

  FIG. 4 shows the relationship between the number of rotations of the refrigeration cooling fan 13 and the refrigeration cooling fan 19 that are the cooling fans and the temperature in the storage chamber. The horizontal axis in FIG. 4 is the temperature in the storage chamber, and the vertical axis is the rotation speed of the cooling fan corresponding to the temperature in the storage chamber. In this embodiment, when the storage room is the refrigeration room 3, the refrigeration cooling fan 13 corresponds as a cooling fan, and when the storage room is the freezing room 6, the refrigeration cooling fan 19 corresponds as a cooling fan. .

  The number of rotations of the refrigeration cooling fan 13 and the refrigeration cooling fan 19 according to the present embodiment corresponds to the temperature range in the storage chamber, “high speed” having the highest rotation speed, and “rotation speed” being lower than “high speed”. The speed is divided into four stages: “low speed” where the rotational speed is lower than “medium speed”, and “stop” where the rotational speed is lower than “low speed” or the rotational speed is zero. In other words, the refrigeration cooling fan 13 and the refrigeration cooling fan 19 are rotated at any one of the four rotation speeds of “high speed”, “medium speed”, “low speed”, and “stop” from the highest rotation speed. Drive (in the case of “stop”, the number of revolutions is zero and may be stopped). The refrigeration cooling fan 13 and the refrigeration cooling fan 19 of the present embodiment are driven at a higher rotation stage as the temperature in the storage chamber is higher. The “high speed” of the refrigeration cooling fan 13 and the “high speed” of the refrigeration cooling fan 19 may have the same or different rotational speed. Similarly, the “medium speed” of the refrigeration cooling fan 13 and the “medium speed” of the refrigeration cooling fan 19, the “low speed” of the refrigeration cooling fan 13, the “low speed” of the refrigeration cooling fan 19, and the refrigeration cooling fan 13. The number of rotations of “stop” (when rotating) and “stop” (when rotating) of the refrigeration cooling fan 19 may be the same or different.

  On the sides of the ice making chamber 4 and the freezing chamber 6, a cold air outlet (not shown) for supplying the cold air supplied from the cooling fan 19 to the ice making chamber 4 and the freezing chamber 6, and the ice making chamber 4 and the freezing chamber 6 are provided. A cold air inlet (not shown) for returning the supplied cold air to the refrigeration cooler chamber 17 is formed.

  A machine room 21 is provided behind the freezer compartment 6. As shown in FIG. 1, a compressor 22, a condenser 23, a three-way valve 24, a machine room fan 25 and the like are provided in the machine room 21. The compressor 22 and the condenser 23 together with the refrigeration cooler 12 and the refrigeration cooler 18 described above constitute a known refrigeration cycle (see FIG. 2) that cools the air circulating in the storage chamber.

  As shown in FIG. 3, the compressor 22 has a compressor drive motor 22 a serving as a drive source. The magnitude of the output of the compressor 22 is controlled by the magnitude of the rotational speed of the compressor drive motor 22a. The compressor drive motor 22a is a brushless motor, and the rotational speed of the compressor drive motor 22a is controlled by the magnitude of the frequency output from the inverter circuit 22b shown in FIG. In the present embodiment, as shown in FIG. 5, the output of the compressor 22 is controlled to increase linearly as the temperature in the refrigerator compartment 3 and the temperature in the freezer compartment 6 increase. The control of the output of the compressor 22 will be described in detail later.

  As shown in FIG. 2, the three-way valve 24 is a valve for supplying the refrigerant condensed by the condenser 23 to one or both of the refrigeration cooler 12 and the refrigeration cooler 18. A capillary tube 26 that depressurizes the refrigerant is provided between the three-way valve 24 and the refrigeration cooler 12, and a capillary tube 27 that depressurizes the refrigerant is also provided between the three-way valve 24 and the refrigeration cooler 18. Yes. By supplying the air (cold air) cooled by the refrigeration cooler 12 and the refrigeration cooler 18 of the refrigeration cycle to each storage room, the stored food stored in each storage room is refrigerated or frozen. .

  The machine room fan 25 is a fan for cooling the condenser 23 and the like, and has a machine room fan motor 25a shown in FIG. The machine room fan motor 25a is a general motor, but may be a motor capable of changing the rotational speed, for example, a brushless motor. For example, the compressor 23 may be configured to cool the condenser 23 optimally by increasing the rotational speed of the machine room fan motor 25a when the compressor 22 has a high output.

  Further, as shown in FIGS. 1 and 3, a refrigeration door switch 31 for detecting opening / closing of the door 3 a is provided at the upper front of the refrigeration chamber 3, and the door 6 a is opened / closed at the upper front of the freezing chamber 6. A refrigeration door switch 32 for detecting the above is provided. The refrigeration door switch 31 and the refrigeration door switch 32 are switches that are turned on and off by opening and closing the doors 3a and 6a, such as a micro switch and a reed switch. When a reed switch is used as the refrigeration door switch 31 and the freezing door switch 32, a magnet (not shown) for switching the reed switch on and off is provided inside the doors 3a and 6a.

  Temperature detecting means for detecting the temperature in the refrigerator compartment 3 at a position farthest from the opening of the refrigerator compartment 3 in the refrigerator compartment 3, for example, in the lower part of the interior of the refrigerator compartment 3, more preferably in the vicinity of the cold air inlet. A refrigeration temperature sensor 33 is provided. Further, the temperature in the freezer compartment 6 is detected at a position farthest from the opening of the freezer compartment 6 in the freezer compartment 6, for example, in the center of the back side in the freezer compartment 6, more preferably in the vicinity of the cold air inlet. A refrigeration temperature sensor 34 as temperature detection means is provided. The refrigeration temperature sensor 33 and the freezing temperature sensor 34 are, for example, thermistors.

  In this embodiment, as shown in FIG. 6, when the door 3a of the refrigerating room 3 is opened, the refrigerating door switch 31 is turned on and the refrigerating cooling fan 13 is also turned on. When the door 3a is closed, the refrigerating door switch 31 is turned on. Is turned off and the refrigeration cooling fan 13 is also turned off. Furthermore, in this embodiment, when the door 6a of the freezer compartment 6 is opened, the refrigeration door switch 32 is turned on and the refrigeration cooling fan 19 is also turned on. When the door 6a is closed, the refrigeration door switch 32 is turned off. The refrigeration cooling fan 19 is also turned off. In FIG. 6, turning off the refrigeration cooling fan 13 and the refrigeration cooling fan 19 means the “stop” described above, and the case where the rotation speed of these fans 13 and 19 is zero or lower than “low speed”. This is the case when driving at a low rotational speed.

Next, an electrical block diagram of the refrigerator 1 will be described with reference to FIG.
The control device 35, which is a control means, is composed of a microcomputer (not shown) having a CPU, ROM, RAM, and the like, and executes the cooling operation of the refrigerator 1 based on a program stored in advance in the ROM. Various sensors such as a refrigeration door switch 31, a refrigeration door switch 32, a refrigeration temperature sensor 33, and a refrigeration temperature sensor 34 are connected to input terminals of the control device 35. The output terminal of the control device 35 is connected to the refrigeration cooling fan motor 13a via the inverter circuit 13b, connected to the refrigeration cooling fan motor 19a via the inverter circuit 19b, and compressed via the inverter circuit 22b. A machine drive motor 22a is connected. Further, the three-way valve 24 is connected to the output terminal of the control device 35 via the drive circuit 24a, and the machine room fan motor 25a is connected via the drive circuit 25b. An operation panel 7 and, for example, an EEPROM 36 as storage means are connected to the input / output terminals of the control device 35. The control device 35 stores various data and information from various sensors in the EEPROM 36 as necessary, and reads information from the EEPROM 36 as appropriate.

Next, the cooling operation of the refrigerator 1 will be described.
The cooling operation includes a “normal cooling operation” and a “forced cooling operation” other than the normal cooling operation.
“Normal cooling operation” refers to control in which the compressor 22 is driven stably and periodically at a predetermined output to perform a normal refrigeration cycle. Specifically, when the “normal cooling operation” is set, the control device 35 first reaches the set lower limit value (the set lower limit temperature) as shown in FIG. Judgment is made. That is, when the control device 35 determines that the temperature in the refrigerator compartment 3 is higher than the lower limit temperature based on the temperature detected by the refrigerator temperature sensor 33 (the refrigerator compartment 3 is warm), the refrigerant is used for refrigerator. The degree of opening and closing of the outlet of the three-way valve 24 is adjusted so that it flows more (predetermined amount) to the cooler 12 side, the rotation speed of the compressor drive motor 22a is increased to increase the output of the compressor 22, and the cooling operation, Run the refrigeration cycle. Thereby, a lot of refrigerant flows into the refrigeration cooler 12, and a lot of cold air is generated by the refrigeration cooler 12. The generated cold air is supplied to the inside of the refrigerating room 3 and the vegetable room 5 through the cold air outlet 15 by the driving of the cooling fan 13 for refrigerating. Chilled. The cool air supplied into the refrigerating chamber 3 is returned to the refrigerating cooler chamber 11 through a cool air suction port (not shown) of the back panel 14.

  Based on the temperature detected by the refrigeration temperature sensor 33, the control device 35 determines that the temperature in the refrigeration room 3 is lower than the lower limit temperature (the stored food can be refrigerated in the refrigeration room 3). In this case, it is next determined whether or not the detection signal of the refrigeration temperature sensor 34 has reached a set lower limit value (set lower limit temperature). When the control device 35 determines that the temperature in the freezer compartment 6 is higher than the lower limit temperature based on the temperature detected by the freezing temperature sensor 34 (the freezer compartment 6 is warm), the refrigerant is a freezer cooler. The degree of opening and closing of the outlet of the three-way valve 24 is adjusted so that it flows more (predetermined amount) to the 18 side, and the output of the compressor 22 is increased by increasing the rotational speed of the compressor drive motor 22a as shown in FIG. Run the refrigeration cycle. As a result, a large amount of refrigerant flows into the refrigeration cooler 18, and a lot of cold air is generated by the refrigeration cooler 18. The generated cold air is supplied into the ice making chamber 4 and the freezing chamber 6 through a cold air outlet (not shown) by driving the cooling fan 19 for freezing. It is cooled early. The cold air supplied into the freezer compartment 6 is returned to the freezer cooler chamber 17 via a cold air inlet (not shown).

  When both the refrigeration temperature sensor 33 and the freezing temperature sensor 34 are lower than the lower limit temperature (the stored food can be stored in the refrigerator 3 and the stored food is stored in the freezer 6) The control device 35 controls the speed of the compressor drive motor 22a at a low speed to reduce the output of the compressor 22, or the speed of the compressor drive motor 22a of the compressor 22 is reduced. Control is performed to make the compressor 22 stop at zero.

  Further, in the “normal cooling operation”, the control device 35 switches the rotational speed of the refrigeration cooling fan motor 13a based on the temperature detected by the refrigeration temperature sensor 33 so that the refrigeration cooling fan 13 is rotated at a predetermined rotational speed. Driving. Specifically, the control device 35 performs control to drive the refrigeration cooling fan 13 at “high speed” when the temperature in the refrigeration chamber 3 is high, and as the temperature in the refrigeration chamber 3 decreases, the “medium speed” is controlled. ”,“ Low speed ”, and“ stop ”drive control. When the control device 35 determines that the door 3a is opened based on the detection signal of the refrigeration door switch 31, as shown in FIG. 6, the refrigeration cooling fan 13 is opened while the door 3a is open, that is, refrigeration. While the door switch 31 is on, control is performed to “stop” the rotational speed of the refrigeration cooling fan motor 13a of the refrigeration cooling fan 13. Further, as will be described in detail later, when the control device 35 determines that the door 3a is closed based on the detection signal of the refrigeration door switch 31, the number of rotations of the refrigeration cooling fan 13 set to the lower order is determined. In the embodiment, control is performed to drive at a low speed for a predetermined time.

  Further, in the “normal cooling operation”, the control device 35 switches the number of rotations of the refrigeration cooling fan motor 19a based on the temperature detected by the refrigeration temperature sensor 34 so that the refrigeration cooling fan 19 is rotated at a predetermined number of rotations. Driving. Specifically, the control device 35 performs control to drive the refrigeration cooling fan 19 at “high speed” when the temperature in the freezer compartment 6 is high, and “medium speed” as the temperature in the freezer compartment 6 decreases. ”,“ Low speed ”, and“ stop ”drive control. Further, when the control device 35 determines that the door 6a is opened based on the detection signal of the refrigeration door switch 32, as shown in FIG. 6, the refrigeration cooling fan 19 is opened while the door 6a is open, that is, refrigeration. While the door switch 32 is on, control is performed to “stop” the rotational speed of the refrigeration cooling fan motor 19a of the refrigeration cooling fan 19. Further, as will be described in detail later, when the control device 35 determines that the door 6a is closed based on the detection signal of the refrigeration door switch 32, the refrigeration cooling fan 19 is set to the lower rotational speed. In the embodiment, control is performed to drive for a predetermined time at a rotation speed of “low speed” which is a lower order among “high speed”, “medium speed”, and “low speed”.

  The “forced cooling operation” is substantially the same refrigeration cycle operation as the “normal cooling operation”, but differs from the “normal cooling operation” in the following points. Examples of the “forced cooling operation” include “pull-down control”, “forced cooling”, “one-time refrigeration”, “hot refrigeration”, and “one-time ice making”. In “pull-down control” and “forced cooling”, the control device 35 automatically performs a predetermined cooling operation based on signals from various sensors, and “one-time freezing”, “hot freezing”, and “one-time ice making” By operating the operation panel 7, the control device 35 performs a predetermined cooling operation based on a setting signal from the operation panel 7.

  “Pull-down control” refers to control that automatically cools the storage room until it reaches a temperature at which it can be refrigerated and frozen after the refrigerator 1 is turned on. For example, when the purchased refrigerator 1 is installed and turned on, the temperature in the storage room is room temperature. Therefore, the control device 35 performs control to automatically cool the storage room for about 3 to 6 hours after the power is turned on.

  "Forced cooling" is a control that automatically cools the storage chamber until it reaches a temperature that can be refrigerated and frozen when the temperature in the storage chamber reaches or exceeds the upper limit temperature (when the storage chamber becomes warm). This is almost the same control as the “pull-down control”.

  “At once freezing” is control for cooling the inside of the freezer compartment 6 in a short time. For example, when the user of the refrigerator 1 operates the operation panel 7 to select “one-time freezing”, the control device 35 reaches the temperature set in the freezer compartment 6 based on the setting signal from the operation panel 7. The compressor drive motor 22a of the compressor 22 is driven at a high speed until the output of the compressor 22 is increased, and control is performed to supply a large amount of refrigerant to the refrigeration cooler 18. Thereby, a lot of cold air is generated in the freezer cooler 18 in a short time, and the inside of the freezer compartment 6 is cooled in a short time.

  “Hot food freezing” refers to control for freezing warm stored foods stored in the freezer compartment 6. For example, when a user of the refrigerator 1 stores warm stored food in the freezer compartment 6 and operates the operation panel 7 to select “hot frozen”, the control device 35 is based on a setting signal from the operation panel 7. The compressor drive motor 22a of the compressor 22 is driven at high speed until the temperature in the freezer compartment 6 reaches the set temperature, and the output of the compressor 22 is increased, and a large amount of refrigerant is supplied to the refrigeration cooler 18. Control to supply. Thereby, a lot of cool air is generated in the freezing cooler 18 in a short time, the inside of the freezer compartment 6 is cooled in a short time, and the warm stored food housed in the freezer compartment 6 is frozen in a short time. “Hot refrigeration” has almost the same control as “one-time cooling”, but the cooling rate for cooling the inside of the freezer compartment 6 is slower and the cooling time is longer than “one-time freezing”.

  “Ice ice making” refers to control that cools the ice making chamber 4 in a short time and generates ice in a short time. For example, when the user of the refrigerator 1 operates the operation panel 7 to select “Ice ice making”, the control device 35 rotates the compressor drive motor 22a of the compressor 22 at a high speed based on the setting signal from the operation panel 7. To increase the output of the compressor 22 and supply a large amount of refrigerant to the refrigeration cooler 18. Thereby, a lot of cold air is generated by the freezing cooler 18, and the generated much cold air is supplied into the ice making chamber 4. The ice making chamber 4 is cooled in a short time, and ice in a short time. Can be generated.

  Next, control of the refrigeration cooling fan 13 and the refrigeration cooling fan 19 during the cooling operation of the refrigerator 1 according to the present embodiment will be described with reference to FIGS. Here, the control of the compressor 22 is not shown in the flowchart, but the control device 35 controls the compressor 22 to the refrigeration temperature sensor 33 and the freezing temperature as described above during the cooling operation. Based on the detection signal of the sensor 34, it is driven with a predetermined output. For example, when the control device 35 determines that the temperature in the refrigeration chamber 3 and the temperature in the freezer compartment 6 are high based on the detection signals of the refrigeration temperature sensor 33 and the freezing temperature sensor 34, the output of the compressor 22 is output. Control to raise.

First, when the user turns on the power of the refrigerator 1 (not shown), the control device 35 starts control of the cooling operation shown in FIG. 7 (start).
The control device 35 first determines, based on the setting signal from the operation panel 7, whether “cooling operation” of “normal cooling operation” or “forced cooling operation” has been selected on the operation panel 7. (Step S1). When it is determined that “cooling operation” is selected (step S1: YES), the control device 35 proceeds to step S2 and when it is determined that “cooling operation” is not selected on the operation panel 7. (Step S1: NO), the operation panel 7 is in a standby state until “cooling operation” is selected.

  In step S2, the control device 35 determines whether the operated content of the operation panel 7 is “normal cooling operation” or “forced cooling operation” based on the setting signal from the operation panel 7. to decide. When it is determined that “normal cooling operation” is selected (step S2: YES), the control device 35 performs control of “normal cooling operation” (step S3). The “normal cooling operation” is repeatedly performed until, for example, the user sets “change of normal cooling operation conditions” or “forced cooling operation” on the operation panel 7 (step S4: NO). “Condition change for normal cooling operation” means, for example, changing the set temperature of the storage room, switching modes such as the power saving mode. On the other hand, when the user operates the operation panel 7 during the “normal cooling operation” and selects “condition change of normal cooling operation” or “forced cooling operation” (step S4: YES), the control device In step 35, the process proceeds to step S2 based on a setting signal from the operation panel 7.

  When it is determined that “change of normal cooling operation condition” is selected in step S2 (step S2: YES), the control device 35 performs “normal cooling operation” based on the change condition (step S3). ). Further, when it is determined that “forced cooling operation” is selected in step S2 (step S2: NO), the control device 35 performs control of “forced cooling operation” (step S5). The “forced cooling operation” is performed, for example, until the control of the “forced cooling operation” ends or until the user selects the forced stop of the “forced cooling operation” on the operation panel 7 (step S6: NO). When it is determined that the “forced cooling operation” has ended or the “forced cooling operation” has been forcibly stopped (step S6: YES), the control device 35 controls the “normal cooling operation” (step S6). S3).

  Here, although not shown, the control device 35 determines whether the doors 3a and 6a were opened or closed during the “normal cooling operation” in step S3 or the “forced cooling operation” in step S5. This is determined by interruption from time to time based on the detection signal from the switch 31 and the detection signal from the freezing door switch 32. Further, when the doors 3a and 6a are opened, the control device 35 instantly opens the doors 3a and 6a, and the type of cooling operation ("normal pull-down operation", "forced cooling operation" or "pull-down control"). , “Forced cooling”, “Cool freezing”, “Hot food freezing”, “Cool ice making”, etc.), refrigeration cooling fan 13 refrigeration cooling fan motor 13a rotation speed, refrigeration cooling fan 19 freezing Data on the state during the cooling operation, such as the number of rotations of the cooling fan motor 19 a and the number of rotations of the machine room fan motor 25 a of the machine room fan 25, is stored in the EEPROM 36. That is, these data are data immediately before the doors 3a and 6a are opened. In other words, when the control device 35 determines that at least one of the door 3a or the door 6a is opened based on the detection signal from the refrigeration door switch 31 and the detection signal from the refrigeration door switch 32, the EEPROM 36 has Data of the state during the cooling operation immediately before the doors 3a and 6a are opened is stored. Furthermore, when the door 3a is open, the control device 35 performs control to “stop” the number of rotations of the refrigeration cooling fan motor 13a of the refrigeration cooling fan 13 while the door 3a is open, When the door 6a is open, control is performed to “stop” the rotational speed of the freezing cooling fan motor 19a of the freezing cooling fan 19 while the door 6a is open. At this time, the control device 35 continues to drive the refrigeration cooling fan 13 or the refrigeration cooling fan 19 on the side where the doors 3a and 6a are closed, and the output of the compressor 22, that is, the compressor drive motor 22a of the compressor 22 is driven. Is controlled based on the temperature of the storage room, specifically, the temperature sensor 33 for refrigeration and the temperature sensor 34 for freezing.

Next, when the control device 35 determines that the doors 3a and 6a are closed based on the detection signal from the refrigeration door switch 31 and the detection signal from the freezing door switch 32, the control device 35 performs temperature adjustment determination control shown in FIG. .
In the temperature adjustment determination control, the control device 35 stores data on the state during the cooling operation immediately before the doors 3a and 6a are stored, which is stored in the EEPROM 36, in this embodiment, the type of the cooling operation immediately before the doors 3a and 6a are opened, Data on the number of rotations of the refrigeration cooling fan motor 13a of the refrigeration cooling fan 13 and the number of rotations of the refrigeration cooling fan motor 19a of the refrigeration cooling fan 19 is read, and "pull-down control" is in progress when the doors 3a and 6a are opened. (Step S7). If the “pull-down control” is being performed when the doors 3a and 6a are opened (step S7: YES), the control device 35 performs control to continue the “pull-down control” after the doors 3a and 6a are closed. Do (return).

  Next, when the control device 35 determines that the “pull-down control” is not being performed when the doors 3a and 6a are opened (step S7: NO), the “forced cooling” is performed when the doors 3a and 6a are opened. It is determined whether it was in the middle (step S8). When the “forced cooling” is in progress when the doors 3a and 6a are opened (step S8: YES), the control device 35 performs control to continue the “forced cooling” after the doors 3a and 6a are closed. Do (return).

  Next, when the doors 3a and 6a are opened, the control device 35 is not in “forced cooling” (step S8: NO), the door 3a of the refrigerator compartment 3 is opened or closed, or the freezer compartment 6 It is determined whether the door 6a is opened or closed (step S9). When the control device 35 determines that the door 6a has changed from the opened state to the closed state based on the detection signals of the refrigeration door switch 31 and the freezing door switch 32 (step S9: NO), the door 6a is When it is opened, it is determined whether the "forced cooling operation" is during "one-time freezing", "hot refrigeration" or "one-time ice making" (steps S10 to S12). When the control device 35 determines that the door 6a is opened during these “forced cooling operations” (step S10: YES, step S11: YES, step S12: YES), after the door 6a is closed, the door Control to continue various “forced cooling operations” immediately before opening 6a is performed (return).

  Next, when the door 6a is opened, the control device 35 is not in the “forced cooling operation” in the “one-time refrigeration”, “hot refrigeration” or “one-time ice making” (in steps S10 to 12) NO), or when the door 3a of the refrigerator compartment 3 is opened and closed (step S9: YES), temperature adjustment control is performed (step S13).

  The temperature adjustment control of this embodiment is shown in FIG. In the temperature adjustment control, the control device 35 determines whether the door 3a of the refrigerator compartment 3 is opened or closed or whether the door 6a of the freezer compartment 6 is opened or closed (step S21). When the control device 35 determines that the door 3a of the refrigerating chamber 3 has been closed from the open state (step S21: YES), the refrigerating cooling fan 13 of the refrigerating cooling fan 13 immediately before the door 3a is opened. Whether the motor 13a is “high speed”, “medium speed”, “low speed”, or “stop” is determined based on the data stored in the EEPROM 36 (step S22). When the cooling fan motor 13a for refrigeration is rotating at any one of “high speed”, “medium speed”, and “low speed” immediately before the door 3a is opened (step S22: YES), the control device 35 is used for refrigeration. The refrigeration cooling fan motor 13a of the cooling fan 13 is driven for a predetermined time at "low speed" set to the lower level (step S23), and the temperature adjustment control is terminated after the predetermined time has elapsed (return). If the cooling fan motor 13a for refrigeration is “stopped” immediately before the door 3a is opened (step S22: NO), the control device 35 ends the temperature adjustment control and “stops” the cooling fan motor 13a for refrigeration. ”Is performed (return).

  If the control device 35 determines in step S21 that the door 6a of the freezer compartment 6 has changed from the open state to the closed state (step S21: NO), the control unit 35 cools the freezing cooling fan 19 immediately before the door 6a is opened. Whether the fan motor 19a is “high speed”, “medium speed”, or “low speed” is determined based on the data stored in the EEPROM 36 (step S24). If the refrigeration cooling fan motor 19a is rotating at any one of “high speed”, “medium speed”, and “low speed” immediately before the door 6a is opened (step S24: YES), the control device 35 The refrigeration cooling fan motor 19a of the cooling fan 19 is driven at "low speed" for a predetermined time (step S25), and the temperature adjustment control is terminated after the predetermined time has elapsed (return). If the refrigeration cooling fan motor 19a is “stopped” immediately before the door 6a is opened (step S24: NO), the control device 35 ends the temperature adjustment control, and the refrigeration cooling fan motor 19a “stops”. ”Is performed (return).

Next, effects of the above embodiment will be described.
Since the refrigeration cooling fan motor 13a of the refrigeration cooling fan 13 is "stopped" while the door 3a of the refrigeration chamber 3 is open, the cold air in the refrigeration chamber 3 is cooled when the door 3a is open. 3 can be prevented from being released to the outside as much as possible.

  When the door 3a that has been opened is closed, the refrigeration cooling fan motor 13a of the refrigeration cooling fan 13 is driven at "low speed", which is the rotation speed set lower than "high speed" and "medium speed". Therefore, the warm air flowing into the refrigerating room 3 moves at a low speed in the refrigerating room 3 and is easily diffused in the refrigerating room 3, and is easily cooled by the cold air in the refrigerating room 3. As a result, the refrigeration temperature sensor 33 that detects the temperature in the refrigeration chamber 3 does not detect the temperature of the warm air when it flows into the refrigeration chamber 3, but detects a temperature lower than that with a delay in opening and closing. To do. Therefore, after the door 3a is closed, the output of the compressor 22 that is driven based on the temperature in the refrigerator compartment 3 does not have a height corresponding to the temperature of the warm air that flows in. It is possible to prevent the stored food from becoming too cold.

  In addition, the freezing cooling fan motor 19a of the freezing cooling fan 19 is "stopped" while the door 6a of the freezing chamber 6 is open. Release to the outside of the freezer compartment 6 can be prevented as much as possible.

  When the opened door 6a is closed, the refrigeration cooling fan motor 19a of the refrigeration cooling fan 19 is driven at "low speed" which is the rotation speed set lower than "high speed" and "medium speed". Therefore, the warm air that has flowed into the freezer compartment 6 moves through the freezer compartment 6 at a low speed and is easily diffused in the freezer compartment 6, and is easily cooled by the cold air in the freezer compartment 6. As a result, the freezing temperature sensor 34 that detects the temperature in the freezer compartment 6 does not detect the temperature of warm air when it flows into the freezer compartment 6 at a stretch, but detects a temperature lower than that with a delay in opening and closing. To do. Therefore, after the door 6a is closed, the output of the compressor 22 that is driven based on the temperature in the freezer compartment 6 does not have a height corresponding to the temperature of the warm air that flows in. It is possible to prevent the stored food from becoming too cold.

  Further, as described above, the warm air that has flowed into the storage chamber (the refrigerator compartment 3 and the freezer compartment 6) moves at a low speed in the storage chamber and easily diffuses in the storage chamber, and is cooled by the cold air in the storage chamber. Therefore, it is possible to prevent warm air from flowing into the refrigeration cooler chamber 11 or the refrigeration cooler chamber 17 as much as possible. As a result, the refrigeration cooler chamber 11 or the refrigeration cooler chamber 17 can be prevented. It is possible to prevent the occurrence of condensation due to the warm air being cooled at once.

  When the control device 35 determines that the doors 3a and 6a are opened and closed and the doors 3a and 6a are closed based on the detection signals of the refrigeration door switch 31 and the freezing door switch 32 during the “forced cooling operation”, the “forced cooling operation” is performed. ”To give priority to continue control. Thereby, the “forced cooling operation” can be finished as soon as possible.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In addition, about the content substantially the same as the said 1st Embodiment, the description of the content is abbreviate | omitted.
When performing the temperature adjustment control shown in FIG. 8 (step S13), the control device 35 of the second embodiment replaces the temperature adjustment control (see FIG. 9) of the first embodiment with the temperature adjustment shown in FIG. Execute control.

  In the temperature adjustment control of the second embodiment, the control device 35 determines whether the door 3a of the refrigerator compartment 3 is opened or closed or whether the door 6a of the freezer compartment 6 is opened or closed (step S31). When the control device 35 determines that the door 3a of the refrigerating chamber 3 has been closed from the open state (step S31: YES), the refrigerating cooling fan 13 of the refrigerating cooling fan 13 immediately before the door 3a is opened. It is determined whether the motor 13a is “high speed”, “medium speed”, “low speed”, or “stop” (steps S32, 33, and 35). That is, when the cooling fan motor 13a for refrigeration is rotating at any one of “high speed”, “medium speed”, and “low speed” immediately before the door 3a is opened (step S32: YES), the control device 35 performs the step. The process proceeds to S33. If the cooling fan motor 13a for refrigeration is “stopped” immediately before the door 3a is opened (step S32: NO), the control device 35 ends the temperature adjustment control and “stops” the cooling fan motor 13a for refrigeration. ”Is performed (return).

  In step S33, the control device 35 determines whether or not the refrigeration cooling fan motor 13a immediately before the door 3a is opened is rotating at "high speed". When the cooling fan motor 13a for refrigeration is rotating at “high speed” immediately before the door 3a is opened (step S33: YES), the control device 35 lowers the cooling fan motor 13a for refrigeration than “high speed”. The motor is driven for a predetermined time at "medium speed", which is one stage lower than the "high speed" in this case (step S34), and the temperature adjustment control is terminated after the predetermined time has elapsed (return). If the refrigeration cooling fan motor 13a is rotating at a speed other than "high speed" immediately before the door 3a is opened, that is, if the refrigeration cooling fan motor 13a is rotating at "medium speed" or "low speed" (step S33: NO), the control device 35 proceeds to step S35.

  In step S35, the control device 35 determines whether or not the refrigeration cooling fan motor 13a immediately before the door 3a is opened is rotating at "medium speed". If the refrigeration cooling fan motor 13a is rotating at “medium speed” immediately before the door 3a is opened (step S35: YES), the control device 35 sets the refrigeration cooling fan motor 13a to be more than “medium speed”. The motor is driven for a predetermined time at a lower speed, in this case “low speed”, which is one stage lower than the “medium speed” (step S36), and the temperature adjustment control is terminated after the predetermined time has elapsed (return). If the cooling fan motor 13a for refrigeration is not “medium speed” immediately before the door 3a is opened, that is, if it is rotating at “low speed” (step S35: NO), the control device 35 will control the cooling fan motor 13a for refrigeration. Is driven at a "low speed" for a predetermined time or is "stopped" for a predetermined time (step S37), and the temperature adjustment control is terminated after the predetermined time has elapsed (return).

  In addition, when the control device 35 determines in step S31 that the door 6a of the freezer compartment 6 has been closed from the open state (step S31: NO), the cooling fan for refrigeration immediately before the door 6a is opened. It is determined whether the 19 refrigeration cooling fan motors 19a are “high speed”, “medium speed”, “low speed”, or “stop” (steps S38, 39, 41). That is, if the refrigeration cooling fan motor 19a is rotating at any one of “high speed”, “medium speed”, and “low speed” immediately before the door 6a is opened (step S38: YES), the control device 35 performs the step. The process proceeds to S39. If the refrigeration cooling fan motor 19a is “stop” immediately before the door 6a is opened (step S38: NO), the control device 35 ends the temperature adjustment control, and the refrigeration cooling fan motor 19a “stops”. ”Is performed (return).

  In step S39, the control device 35 determines whether or not the refrigeration cooling fan motor 19a immediately before the door 6a is opened is rotating at "high speed" (step S39). If the refrigeration cooling fan motor 19a is rotating at “high speed” immediately before the door 6a is opened (step S39: YES), the control device 35 lowers the refrigeration cooling fan motor 19a to be lower than “high speed”. The motor is driven for a predetermined time at “medium speed”, which is one stage lower than the “high speed” in this case (step S40), and the temperature adjustment control is terminated after the predetermined time has elapsed (return). If the refrigeration cooling fan motor 19a is rotating at a speed other than "high speed" immediately before the door 6a is opened, that is, if the refrigeration cooling fan motor 19a is rotating at "medium speed" or "low speed" (step S39: NO), the control device 35 proceeds to step S41.

  In step S41, the control device 35 determines whether or not the refrigeration cooling fan motor 19a immediately before the door 6a is opened is rotating at "medium speed". If the refrigeration cooling fan motor 19a is rotating at “medium speed” immediately before the door 6a is opened (step S41: YES), the control device 35 causes the refrigeration cooling fan motor 19a to move more than “medium speed”. The motor is driven for a predetermined time at a lower speed, in this case “low speed”, which is one stage lower than the “medium speed” (step S42), and the temperature adjustment control is terminated after the predetermined time has elapsed (return). If the refrigeration cooling fan motor 19a is not "medium speed" immediately before the door 6a is opened, that is, if it is rotating at "low speed" (step S41: NO), the control device 35 causes the refrigeration cooling fan motor 19a to rotate. Is driven at a "low speed" for a predetermined time or is "stopped" for a predetermined time (step S43), and the temperature adjustment control is terminated after the predetermined time has elapsed (return).

Next, the effect of the present embodiment will be described.
In the present embodiment, when the door 3a that has been opened is closed, the refrigeration cooling fan motor 13a of the refrigeration cooling fan 13 has a rotational speed set lower than the rotational speed immediately before the door 3a is opened. Then, since it is driven for a predetermined time at a rotational speed one step lower than immediately before the door 3a is opened, the warm air flowing into the refrigerating room 3 moves at a slower speed in the refrigerating room 3 and is easily diffused in the refrigerating room 3, It becomes easy to be cooled by the cool air in the chamber 3. As a result, the refrigeration temperature sensor 33 that detects the temperature in the refrigeration chamber 3 does not detect the temperature of the warm air when it flows into the refrigeration chamber 3, but detects a temperature lower than that with a delay in opening and closing. To do. Therefore, after the door 3a is closed, the output of the compressor 22 that is driven based on the temperature in the refrigerator compartment 3 does not have a height corresponding to the temperature of the warm air that flows in. It is possible to prevent the stored food from becoming too cold.

When the opened door 6a is closed, the refrigeration cooling fan motor 19a of the refrigeration cooling fan 19 rotates at a rotation speed set lower than the rotation speed immediately before the door 6a opens, in this embodiment, the door 6a opens. Since it is driven for a predetermined time at a rotational speed one step lower than immediately before, the warm air flowing into the freezer compartment 6 moves at a low speed in the freezer compartment 6 and easily diffuses in the freezer compartment 6. It becomes easy to be cooled by. As a result, the freezing temperature sensor 34 that detects the temperature in the freezer compartment 6 does not detect the temperature of warm air when it flows into the freezer compartment 6 at a stretch, but detects a temperature lower than that with a delay in opening and closing. To do. Therefore, after the door 6a is closed, the output of the compressor 22 that is driven based on the temperature in the freezer compartment 6 does not have a height corresponding to the temperature of the warm air that flows in. It is possible to prevent the stored food from becoming too cold.
In addition, the effect of 2nd Embodiment has an effect similar to 1st Embodiment.

The present invention is not limited to the embodiment described above and shown in the drawings, and the following modifications and expansions are possible.
When one of the doors 3a of the refrigerator compartment 3 or the door 6a of the freezer compartment 6 is opened first, and the other door is opened when this one door is opened, or the doors 3a, 6a are simultaneously opened. In such a case, the temperature adjustment determination control and the temperature adjustment control may be preferentially executed based on a predetermined door closing operation. For example, the control according to the first or second embodiment may be performed based on the opening and closing of the door that is determined to be opened first.

  In the first and second embodiments, the rotational speeds of the refrigeration cooling fan motor 13a of the refrigeration cooling fan 13 and the refrigeration cooling fan motor 19a of the refrigeration cooling fan 19 are “high speed”, “medium speed”, “ It has been described as four stages of “low speed” and “stop”. However, these rotational speeds may be divided into three stages or less or five stages or more. Further, in the case where these rotation speeds are divided into three or more stages and the control of the second embodiment is performed when the doors 3a and 6a are closed, the rotation immediately before the doors 3a and 6a are opened. Control for driving for a predetermined time at a number of revolutions lower than the number of stages may be performed. Further, the rotational speeds of the refrigeration cooling fan motor 13a of the refrigeration cooling fan 13 and the refrigeration cooling fan motor 19a of the refrigeration cooling fan 19 may be controlled in a relationship proportional to the temperature of the storage room.

  The refrigeration temperature sensor 33 may be provided in the refrigeration cooler chamber 11, and more preferably provided leeward of the refrigeration cooling fan 13. Further, the refrigeration temperature sensor 34 may be provided in the refrigeration cooler chamber 17, and more preferably provided in the lee of the refrigeration cooling fan 19.

The refrigeration cycle may be configured to share one cooler for refrigeration and freezing.
Although the EEPROM 36 has been described as the storage means, a RAM or other storage medium may be used.

  In 1st and 2nd embodiment, although demonstrated using the door switch 31 for refrigeration and the door switch 32 for freezing, the door switch which detects the opening / closing of the door 4a of the ice making chamber 4, and the opening / closing of the door 5a of the vegetable chamber 5 A door switch for detecting the above may be provided, and temperature sensors may be provided in the ice making room 4 and the vegetable room 5 to control the first and second embodiments.

In 1st and 2nd embodiment, although demonstrated using the refrigerator 1 provided with the refrigerator compartment 3, the ice making room 4, the vegetable compartment 5, and the freezer compartment 6 as a storage room, the refrigerator provided with storage rooms other than these For example, the present invention can also be applied to a switching room that can be arbitrarily switched between refrigeration and freezing, and a refrigerator further provided with a second freezing room. In this case, it is necessary to provide a door switch for detecting the opening / closing of the switching chamber or the second freezing chamber, and to provide a temperature sensor in the switching chamber or the second freezing chamber.
In addition, the present invention can be implemented with appropriate modifications without departing from the scope of the present invention.

  In the drawings, 1 is a refrigerator, 3 is a refrigerator room (storage room), 4 is an ice making room (storage room), 5 is a vegetable room (storage room), 6 is a freezer room (storage room), 3a, 4a, 5a, 6a Is a door, 7 is an operation panel, 12 is a refrigeration cooler (cooler), 13 is a refrigeration cooling fan (cooling fan), 18 is a refrigeration cooler (cooler), 19 is a refrigeration cooling fan (cooling fan) ), 22 is a compressor, 31 is a refrigeration door switch (door switch), 32 is a refrigeration door switch (door switch), 33 is a refrigeration temperature switch (temperature detection means), and 34 is a refrigeration temperature sensor (temperature detection). Means) and 35 are control devices (control means).

Claims (3)

A storage chamber with an opening formed on the front surface;
A door for opening and closing the opening of the storage room;
A door switch for detecting opening and closing of the door;
Temperature detecting means for detecting the temperature in the storage chamber;
A cooler for generating cold air;
A compressor constituting a refrigeration cycle together with the cooler;
A cooling fan for supplying cold air generated by the cooler into the storage chamber;
An operation panel for setting the cooling operation;
Control means for controlling the driving of the compressor and the cooling fan based on a setting signal from the operation panel, a detection signal of the temperature detection means and the door switch,
The control means controls the output of the compressor based on a detection signal of the temperature detection means during normal cooling operation, and controls the cooling fan to be driven at a set rotational speed. When it is determined that the door has been opened based on the detection signal of the door switch during driving, the cooling fan is controlled to stop while the door is open, and the detection is performed based on the detection signal of the door switch. When it is determined that the door is closed, the refrigerator is controlled to drive the cooling fan at a lower rotation speed for a predetermined time.   When the control means determines that the door is closed based on the detection signal of the door switch, the control means performs a control for driving the cooling fan at a rotation speed lower than a rotation speed immediately before the door is opened for a predetermined time. The refrigerator according to claim 1.   The control means performs control to continue the forced cooling operation when it is determined that the door is opened and closed during the forced cooling operation other than the normal cooling operation and the door is closed based on a detection signal of the door switch. The refrigerator according to claim 1 or 2.

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