JP2013224777A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator configured to secure a stable cooling capacity more reliably by focusing on opening/closing motions of dampers.SOLUTION: A control board 31 disposed in a refrigerator includes: a refrigerator operation condition detecting means 71 for controlling opening/closing motions of dampers on the basis of detection of the opening/closing motion of each of the dampers (freezing compartment cooling damper, a refrigerating compartment cooling damper), and information from a plurality of temperature sensors; a fan rotation speed setting means 72 setting a target rotation speed of an inside fan motor 9 before starting the opening/closing motion of each damper, on the basis of the information obtained by the detecting means 71; a fan motor rotation speed detecting means 73 detecting a rotation speed of the fan motor 9 after starting the opening/closing motion of each damper; a fan motor rotation speed correcting means 74 calculating a rotation speed correction value on the basis of a difference value obtained by subtracting an actual rotation speed from the target rotation speed after starting the opening/closing motion of each damper; and a fan motor rotation speed control means 75 adjusting and controlling the rotation speed of the fan motor 9 on the basis of the rotation speed correction value as necessary.

Description

  The present invention relates to a refrigerator provided with an internal fan motor and a control device that controls the number of rotations.

  Conventionally, in a general refrigerator, the inside of a cabinet with a heat insulating box is divided into a freezer compartment, a refrigerator compartment, and a vegetable compartment and has a plurality of storage compartments. An internal fan motor is installed, and the cooling air is cooled by circulating the cool air from the cooler to each room by the internal fan motor. A machine room is provided in the lower part of the heat insulation box, and a compressor and a condenser constituting a refrigerant circuit together with a cooler and a machine room fan motor for air-cooling these devices are installed in the machine room. ing. Furthermore, in recent years, the voltage applied to the internal fan motor based on the temperature in each room, or the voltage applied to the machine room fan motor based on the temperature of the condenser or compressor, etc. can be varied, and the number of rotations of each fan motor. By making this variable, appropriate cold air circulation or air cooling corresponding to each temperature is performed. In addition, in recent refrigerators, a refrigerator having a structure in which a damper for opening and closing an air passage is provided in a cold air passage in order to selectively cool a plurality of storage rooms has been commercialized.

  By the way, in a refrigerator having a structure provided with a damper, the number of rotations of the internal fan motor may change greatly due to a change in airflow resistance due to opening / closing of the damper in each storage chamber or a change in the viscosity of the bearing oil accompanying a change in ambient temperature. Are known. Therefore, the existing refrigerator is provided with a rotation speed detection means for detecting the rotation speed of each fan motor, and by performing feedback control for adjusting each fan motor to the set rotation speed based on the detection result, it is further stable. The purpose of the specification is to ensure the cooling performance.

  Incidentally, as a well-known technique related to a refrigerator that performs feedback control for adjusting a fan motor, for example, a “refrigerator” that stably rotates a fan motor at a set rotational speed even when a load fluctuates (see Patent Document 1). ).

  However, in this refrigerator, the rotational speed is stabilized by performing feedback control at regular intervals to correct fluctuations in the rotational speed caused by changes in the surrounding environment of the fan motor. Therefore, if the ambient temperature of the fan motor decreases after the feedback control, for example, the rotational speed of the fan motor decreases as the viscosity of the bearing oil increases. In such a case, since the operation is performed at a low speed before the next feedback control is performed, the cooling capacity of the refrigerator is reduced.

  Technologies for solving these problems have also been proposed. For example, by measuring the ambient temperature of the fan motor more precisely and effectively performing the timing of feedback control of the fan motor, more reliable and stable cooling efficiency. “Refrigerator” (see Patent Document 2) that ensures the above.

Japanese Patent Laid-Open No. 11-101542 JP 2005-156102 A

  In the technology according to Patent Document 2 described above, the temperature around the fan motor is estimated from the internal temperature or the condenser ambient temperature, and the target rotational speed is corrected based on the estimated temperature to prevent the cooling capacity from being lowered. However, since the change in the rotation speed due to the magnitude of the wind path resistance accompanying opening / closing of the damper is not considered in the refrigerator including the damper as described above, for example, the damper is changed from the open state to the closed state after the feedback control. When the resistance increases, the rotational speed of the fan motor decreases. As in the case of Patent Document 1, the cooling capacity as a refrigerator decreases because the motor rotates at a low speed until the next feedback control is performed. There is a problem that it ends up.

  In short, the techniques disclosed in Patent Document 1 and Patent Document 2 are difficult to apply in a refrigerator equipped with a damper, and cooling capacity is increased when the damper is closed from the open state to increase the air path resistance. There is a disadvantage that it is not possible to solve the problem of the decrease of the image quality.

  The present invention has been made to solve such problems, and a technical problem thereof is to provide a refrigerator capable of ensuring a more reliable and stable cooling capacity by paying attention to the opening / closing operation of the damper. .

  In order to achieve the above technical problem, the first means of the present invention includes a plurality of storage chambers provided by partitioning the interior with a heat insulator, and a cold air duct for blowing cool air to the plurality of storage chambers. A damper installed in the cool air duct that opens and closes, and a fan motor that cools the cool air by circulating air through the cool air duct into a plurality of storage chambers. The number of rotations detected by the fan motor rotation number detection means from the target rotation number by the fan motor rotation number setting means, the fan motor rotation number detection means for detecting the rotation number of the fan motor, and the fan motor rotation number setting means Fan motor rotation speed correction means for calculating the rotation speed correction value based on the result of calculating the difference value obtained by subtracting, and adjusting and controlling the rotation speed of the fan motor based on the rotation speed correction value A fan motor speed control means, the fan speed setting means sets a target speed before starting the damper opening / closing operation, and the fan motor speed detection means is set after the damper opening / closing operation ends. The fan motor rotation speed is detected, the fan motor rotation speed correction means calculates the rotation speed correction value after the damper opening / closing operation is completed, and the fan motor rotation speed control means is the rotation speed correction value after the damper opening / closing operation is completed. The number of rotations of the fan motor is adjusted based on the above.

  The second means of the present invention is the first means, wherein a plurality of dampers are installed, and the fan motor rotation speed detection means rotates the fan motor after the opening / closing operation of any one of the plurality of dampers is completed. The fan motor rotation number correction means calculates the rotation number correction value after the opening / closing operation of any one of the plurality of dampers is completed.

  According to a third means of the present invention, in the second means, the plurality of dampers are respectively installed in the refrigerator compartment and the freezer compartment, and the plurality of storage chambers are selectively made independent by the respective opening / closing patterns. And cooling.

  According to a fourth means of the present invention, in any one of the first means to the third means, the fan motor rotational speed control means changes the voltage applied to the fan motor to change the rotational speed of the fan motor. It is characterized by controlling.

  According to the refrigerator of the present invention, paying attention to the fact that the damper opens and closes according to the temperature of each storage room in the warehouse, the target rotation speed is set by the fan rotation speed setting means before the opening and closing operation of the damper is started. After the damper opening / closing operation is completed, the fan motor rotation speed detection means detects the fan motor rotation speed, the fan motor rotation speed correction means calculates the rotation speed correction value, and the fan motor rotation speed control means calculates the damper opening / closing operation. By adjusting the rotation speed of the fan motor based on the rotation speed correction value after the end of the operation, a function to perform adjustment control by correcting the rotation speed of the fan motor every time the damper opening / closing operation is performed can be obtained. The control software is simplified, and the set rotational speed of the fan motor and the actual rotational speed can be reduced without performing feedback control related to the rotational speed of the fan motor periodically as in the past. Addition can be reduced les, it is possible also to sufficiently suppress the rotation speed of the change in the fan motor due to a change in the ambient temperature of the fan motor. As a result, stable cooling capacity can be ensured more reliably and power consumption can be sufficiently reduced.

It is the external view which showed the refrigerator which concerns on Example 1 of this invention from the front direction. It is side surface sectional drawing in the XX direction which shows the store | warehouse | chamber interior of the refrigerator shown in FIG. It is the external view from the back direction which showed partially the internal structure of the refrigerator shown in FIG. It is the figure which expanded and showed a partial fracture | rupture and shown the principal part of the side surface sectional view shown in FIG. It is the figure which expanded and showed a part in the external appearance from the back direction shown in FIG. It is the figure which showed the airway resistance characteristic accompanying the opening / closing operation | movement of each damper with which the refrigerator demonstrated in FIGS. It is the figure which showed the air volume characteristic and rotation speed characteristic in the fan motor provided in the refrigerator demonstrated in FIGS. 1-5 by the relationship of the static pressure with respect to an air volume, and rotation speed. FIG. 6 is a functional block diagram showing a basic configuration relating to a control board which is a control device provided in the refrigerator described in FIGS. 1 to 5. FIG. 9 is a flowchart showing an operation process by the control board described in FIG. 8. FIG.

  Hereinafter, examples of the refrigerator of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an external view showing a refrigerator according to a first embodiment of the present invention from the front direction. 2 is a side cross-sectional view in the XX direction showing the internal structure of the refrigerator, and FIG. 3 is a partially transparent view of the internal structure of the refrigerator (arrangement of ducts and outlets, etc.). It is an external view from the back direction. Further, FIG. 4 is an enlarged view of a main part of the side sectional view shown in FIG. 2 and is partially broken, and FIG. 5 is an enlarged view showing a part of the appearance from the back direction shown in FIG. FIG.

  Referring to FIG. 1, the refrigerator 1 according to the first embodiment includes a refrigerator room 2, an ice making room 3, an upper freezer room 4, and a lower stage as a plurality of storage rooms provided by partitioning the interior with a heat insulator. It has a configuration having a freezer compartment 5 and a vegetable compartment 6. Hereinafter, the refrigerator compartment 2 and the vegetable compartment 6 may be collectively referred to as a refrigerated temperature zone, and the ice making chamber 3, the upper freezer compartment 4, and the lower freezer compartment 5 may be collectively referred to as a freezer temperature zone 60. .

  The refrigerating room 2 is provided with front-opening refrigerating room doors 2a and 2b divided into left and right sides, and the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are respectively drawer-type ice making room doors. 3a, upper freezer compartment door 4a, lower freezer compartment door 5a, and vegetable compartment door 6a. Hereinafter, the refrigerator compartment doors 2a and 2b, the ice making compartment door 3a, the upper freezer compartment door 4a, the lower freezer compartment door 5a, and the vegetable compartment door 6a are simply referred to as doors.

  In addition, the refrigerator 1 has a door sensor (not shown) that detects the open / closed state of each of the doors 2a, 2b, 3a, 4a, 5a, and 6a, and the state determined to be the door open state continues for a predetermined time, for example, for one minute or longer. In this case, an alarm (not shown) for notifying the user, a temperature setting device (not shown) for setting the temperature of the refrigerator compartment 2 and the vegetable compartment 6, and the temperature setting of the freezing temperature zone compartment are provided.

  Referring to FIG. 2, the outside of the refrigerator 1 and the inside of the refrigerator 1 are separated from each other by a heat insulating box 10 formed by filling a foam heat insulating material (for example, foamed polyurethane or the like). A plurality of vacuum heat insulating materials 25 are mounted in the back wall of the heat insulating box 10.

  The refrigerator 1 is separated from the refrigerator compartment 2, the upper freezer compartment 4, and the ice making compartment 3 (shown in FIG. 1 and not shown in FIG. 2) by a heat insulating partition wall 28, and is insulated. The lower freezer compartment 5 and the vegetable compartment 6 are separated from each other by a partition wall 29.

  A plurality of door pockets 32 are provided on the inner side of the doors 2a and 2b. In the refrigerator compartment 2, a plurality of storage spaces are partitioned in the vertical direction by a plurality of shelves 36.

  The upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 are stored in the storage containers 3b, 4b, 5b, so as to be integrated with the doors 3a, 4a, 5a, 6a provided in front of the respective compartments. 6b is provided, and each storage container 4b, 5b, 6b can be pulled out by putting a hand on a handle portion (not shown) of each door 4a, 5a, 6a and pulling it out to the front side. Similarly, in the case of the ice making chamber 3 shown in FIG. 1, the storage container 3b shown in FIG. 2 is provided so as to be integrated with the door 3a, and the handle 3 (not shown) of the door 3a is put on a hand. The storage container 3b can be pulled out by pulling it toward the front side.

  2 to 5, the cooler 7 is provided in the cooler storage chamber 8 provided substantially at the back of the lower freezing chamber 5, and the inside of the refrigerator provided above the cooler 7. Cold air of air cooled by heat exchange with a cooler 7 by a fan motor (blower) 9 (hereinafter, low temperature air cooled by the cooler 7 is referred to as cold air) is a refrigerator compartment air duct 11, an upper freezer compartment The refrigeration chamber 2, the upper refrigeration chamber 4, the lower refrigeration chamber 5, and the ice making chamber 3 are sent to the refrigeration chamber 2, the lower refrigeration chamber blast duct 13, and an ice making chamber blast duct (not shown). The air blowing to each room is controlled by opening / closing operations in the refrigerating room cooling damper 20 and the freezing room cooling damper 50. Incidentally, the air ducts for the refrigerator compartment 2, the ice making chamber 3, the upper freezer compartment 4, and the lower freezer compartment 5 are indicated by broken lines in FIG. 3 (in FIG. 3, the refrigerator compartment air duct 11 and the upper freezer compartment air duct 12 are shown. Is provided on the back side of each room of the refrigerator 1 as shown in FIG.

  Specifically, referring to FIGS. 2 to 5 (mainly FIG. 3), when the refrigerating room cooling damper 20 is in the open state and the freezing room cooling damper 50 is in the closed state, the cold air is in the refrigerating room duct 15 and the refrigerating room. It is sent to the refrigerator compartment 2 through the blower outlet 2c provided in multiple stages through the room air duct 11. After cooling of the refrigerator compartment 2, it flows in from the refrigerator compartment return port 2d provided in the lower right part of the refrigerator compartment back right side, and the back of the vegetable compartment 6 through the inter-room communication duct 16 between the refrigerator compartment 2 and the vegetable compartment 6 The vegetable compartment 6 is cooled by flowing into the vegetable compartment 6 from the vegetable compartment outlet 6c provided on the upper right side. The cool air that has cooled the vegetable compartment 6 is cooled by the vegetable compartment return port 6d (shown in FIG. 2) provided in front of the lower part of the heat insulating partition wall 29 through the vegetable compartment return duct 18 (shown in FIG. 2). 7 flows in from the vegetable chamber return discharge port 18a having a width substantially equal to the width of 7.

  Although the freezer cooling damper 50 is omitted in FIG. 3, when the freezer cooling damper 50 is in an open state, the cold air heat-exchanged by the cooler 7 is schematically shown by the internal fan motor 9, Air is blown from the outlets 3c and 4c to the ice making chamber 3 and the upper freezer compartment 4 through the upper freezer compartment air duct 12, and from the outlet 5c to the upper freezer compartment 4 through the lower freezer compartment air duct 13 (shown in FIG. 4). It is blown to. Generally, cold air having a low temperature relative to the ambient temperature forms a downward flow from the upper side to the lower side. Therefore, if more cold air is supplied to the upper side of the room, the room can be cooled well. In the refrigerator 1 of the first embodiment, the freezer compartment cooling damper 50 is provided, but by installing the freezer compartment cooling motor 50 above the internal fan motor 9, the air from the internal fan motor 9 can be smoothly blown, and the lower freezer compartment 5. Consideration is given so that air can be blown to the ice making chamber 3 and the upper freezing chamber 4 located in the upper stage.

  Further, referring to FIG. 5, the cold air that has cooled the refrigerator compartment 2 flows into the vegetable compartment 6 through the inter-room communication duct 16 provided on the side of the cooler storage compartment 8. The return cold air from the vegetable room 6 flows in from the vegetable room return port 6d (see FIG. 2) and passes through the vegetable room return duct 18 (shown in FIGS. 2 and 4) provided in the heat insulating partition wall 29. Then, it flows into the cooler storage chamber 8 from the vegetable chamber return discharge port 18a (see FIG. 5) provided in front of the lower portion of the cooler storage chamber 8 and having a width approximately equal to the width of the cooler 7.

  On the other hand, the cold air that has cooled the freezing temperature zone chamber separates the cooler storage chamber 8 from the freezing temperature zone chamber, and is provided below the partition plate 54 (shown in FIG. 4) provided with the lower freezing chamber air duct 26. The refrigerant flows into the cooler storage chamber 8 through the freezer return port 17 having a width dimension substantially equal to the width of the cooler 7 provided. The defrosting heater 22 provided below the cooler storage chamber 8 is a glass tube heater, and an aluminum radiating fin 22a (shown in FIG. 5) is provided on the outer periphery of the glass tube. An upper cover 53 (shown in FIG. 4) is provided above the defrost heater 22 in order to prevent the defrost water from dripping onto the defrost heater 22.

  The defrost water produced by the frost adhering to the wall of the cooler 7 and the surrounding cooler storage chamber 8 being melted by the defrost of the defrost heater 22 is provided in the lower part of the cooler storage chamber 8. 23, after reaching the evaporating dish 21 (shown in FIGS. 2 and 4) disposed in the machine room 19 through the drain pipe 27, the compressor 24 and the machine room 19 are schematically illustrated. It is evaporated by the heat generated by the condenser.

  A cooler temperature sensor 35 attached to the cooler 7 is located at the upper left as viewed from the front of the cooler 7, a refrigerating room temperature sensor 33 is provided in the refrigerating room 2, and a freezing room temperature sensor 34 is provided in the lower freezing room 5. The temperature of the cooler 7 (hereinafter referred to as “cooler temperature”), the temperature of the refrigerator compartment 2 (hereinafter referred to as “refrigerator compartment temperature”), and the temperature of the lower freezer compartment 5 (hereinafter referred to as “freezer compartment temperature”). Can be detected). Furthermore, the refrigerator 1 includes a schematic outside air temperature sensor that detects the temperature outside the refrigerator. Incidentally, the vegetable room temperature sensor 33 a is also arranged in the vegetable room 6.

  A control board 31 (shown in FIG. 2) is a control device (control means) configured by mounting a CPU, a memory such as a ROM and a RAM, an interface circuit, and the like on the upper surface side of the refrigerator 1. Is described in detail later). The control board 31 includes the above-described outside air temperature sensor, cooler temperature sensor 35, refrigerator temperature sensor 33, vegetable room temperature sensor 33a, freezer room temperature sensor 34, and doors 2a, 2b, 3a, 4a, 5a, 6a. A simplified door sensor for detecting the open / closed state of the refrigerator, a simplified temperature setter provided on the inner wall of the refrigerator compartment 2, a simplified temperature setter provided on the inner wall of the lower freezer compartment 5, etc. Control of each compressor 24 for controlling the ON / OFF of the compressor 24, the opening / closing operation of the cold room cooling damper 20 and the freezing greenhouse cooling damper 50 individually, and the fan in the refrigerator Control such as ON / OFF control and rotation speed control of the motor 9 and ON / OFF of an alarm for notifying the open state of each door 2a, 2b, 3a, 4a, 5a, 6a described above. Do.

  In the refrigerator 1 according to the first embodiment, attention is paid to the opening / closing operations of the cold room cooling damper 20 and the freezing greenhouse cooling damper 50, and the target rotation speed of the internal fan motor 9 is set by the control board 31 before the opening / closing operation is started. Then, after the opening / closing operation is completed, the rotational speed of the internal fan motor 9 is detected, the rotational speed correction value is calculated, and the rotational speed of the internal fan motor 9 is adjusted based on the rotational speed correction value after the opening / closing operation is completed. It has a function to perform.

FIG. 6 is a graph showing the airway resistance characteristics associated with the opening / closing operations of the dampers (the cold room cooling damper 20 and the freezing greenhouse cooling damper 50) provided in the refrigerator 1 according to the first embodiment with respect to the air volume Q [m ³ / min]. It is the figure shown by the relationship of Ps [Pa]. Here, the air path resistance characteristics C <b> 1 to C <b> 3 that change according to the opening / closing operation of the refrigerating room cooling damper 20 and the freezing room cooling damper 50 provided in the cold air path of the refrigerator 1 are shown.

  The air path resistance characteristic C1 is the air path resistance when the freezer compartment cooling damper 50 close to the internal fan motor 9 is closed and the refrigerating room cooling damper 20 far from the internal fan motor 9 is open. Except for the case where the freezing chamber cooling damper 50 and the refrigerating room cooling damper 20 are both closed and the airflow Q is not obtained because the cold air does not flow, the airflow resistance Q is the smallest and the airflow Q is small. This corresponds to the case where cold air is difficult to flow.

  The air path resistance characteristic C2 indicates the air path resistance when the freezer cooling damper 50 is in the open state and the refrigerating room cooling damper 20 is in the closed state, and the air path resistance is much longer than that in the case of the air path resistance characteristic C1. Since it is small, the air volume Q is much larger than in the case of the air path resistance characteristic C1, and this corresponds to the case where the cold air flows relatively easily.

  The air path resistance characteristic C3 indicates the air path resistance when the freezer cooling damper 50 is in the open state and the refrigerating room cooling damper 20 is also in the open state. The air path resistance is more than that in the case of the air path resistance C2. Since the air volume Q is smaller than that of the air path resistance characteristic C2, it corresponds to the case where the cold air flows most easily.

  In short, if the magnitude of the airway resistance is compared, the relationship of airway resistance characteristic C1> airway resistance characteristic C2> airway resistance characteristic C3 is established.

FIG. 7 shows the relationship between the air flow rate characteristic C4 and the rotation speed characteristic C5 in the internal fan motor 9 provided in the refrigerator 1 according to the first embodiment, and the static pressure Ps [Pa] and the rotation speed Nrpm with respect to the air flow Q [m ³ / min]. It is the figure shown by.

  The air volume characteristic C4 of the internal fan motor 9 indicates that the static pressure Ps is maximum when the air volume Q is minimum (zero), and the static pressure Ps is minimum (zero) when the air volume Q is maximum. Incidentally, the intersection when the airflow resistance characteristics C1 to C3 shown in FIG. 6 are combined with the airflow characteristics C4 in FIG. 7 is the actual airflow of the cool air under the respective damper opening / closing operation conditions.

  The rotation speed characteristic C5 of the internal fan motor 9 indicates that the rotation speed is high when the air volume Q is maximum and the rotation speed is low when the air volume Q is minimum (zero).

  From the above results, it can be seen that the number of rotations of the internal fan motor 9 varies depending on the open / closed state of each damper (the freezer compartment cooling damper 50 and the refrigerator compartment cooling damper 20).

  By the way, if the number of rotations of the internal fan motor 9 is higher than the required number of rotations, there is a possibility that the power consumption becomes large, or that each storage chamber becomes too cold and becomes lower than the set temperature. is there. Further, when the rotation speed of the internal fan motor 9 is lower than the required rotation speed, the time for each storage room temperature to reach the set temperature is delayed, or the set temperature is not reached. Problems can occur. Therefore, it can be said that it is desirable to operate the internal fan motor 9 according to the required rotational speed (set target rotational speed).

  FIG. 8 is a functional block diagram illustrating a basic configuration of the control board 31 that is a control device (control means) provided in the refrigerator 1 according to the first embodiment.

  The control board 31 is connected to a plurality of temperature sensors installed in the refrigerator 1 to receive a temperature detection signal from each temperature sensor, and is connected to each damper (freezer compartment cooling damper 50, refrigerator compartment cooling damper 20). Refrigeration operation state detection means 71 that controls the opening / closing operation based on the detection of the opening / closing operation state and information obtained from the temperature detection signal, and the warehouse based on the information obtained by the refrigerator operation state detection means 71 Fan rotational speed setting means 72 for setting a target rotational speed of the internal fan motor 9, fan motor rotational speed detection means 73 connected to the internal fan motor 9 for detecting the actual rotational speed of the internal fan motor 9, Based on the result of calculating the difference value obtained by subtracting the actual rotational speed detected by the fan motor rotational speed detecting means 73 from the target rotational speed by the fan motor rotational speed setting means 72. Fan motor rotation speed correction means 74 for calculating the rotation speed correction value (voltage applied to the internal fan motor 9), and the rotational speed of the internal fan motor 9 is adjusted based on the rotation speed correction value as necessary. Fan motor rotational speed control means 75 for controlling the motor.

  Among these, the fan rotation speed setting means 72 sets the target rotation speed of the internal fan motor 9 before the opening / closing operation of each damper (the freezer compartment cooling damper 50 and the refrigerator compartment cooling damper 20) is started. The fan motor rotational speed detection means 72 detects the actual rotational speed of the internal fan motor 9 after the opening / closing operation of each damper (freezer compartment cooling damper 50, refrigerator compartment cooling damper 20) is completed. The data is sent to the correction means 74. Therefore, the fan motor rotation speed correction means 74 calculates a rotation speed correction value after the damper opening / closing operation is completed. Thereby, the fan motor rotation speed control means 75 is based on the rotation speed correction value obtained by the fan motor rotation speed correction means 74 after the opening / closing operation of each damper (freezer compartment cooling damper 50, refrigerator compartment cooling damper 20) is completed. The number of rotations of the internal fan motor 9 is adjusted (the voltage applied to the internal fan motor 9 is changed).

  FIG. 9 is a flowchart showing operation processing by the control board 31. In the control board 31, after the power supply to the refrigerator 1 is turned on, as an initial operation (step S <b> 1), an overall initialization operation including preparation for opening / closing operation activation of each damper (refrigeration chamber cooling damper 20, freezing chamber cooling damper 50) is performed. Etc.

  Next, each of the sensors (a signal thereof) including a plurality of temperature sensors installed in the refrigerator 1 by the refrigerator operation state detection unit 71 and the state of the driving parts are read (step S2), and each damper (cooling room cooling) Before starting the opening / closing operation of the damper 20 and the freezer compartment cooling damper 50), the fan motor rotation speed setting means 72 sets the fan motor rotation speed setting value Nctl (step S3) related to the rotation speed setting of the internal fan motor 9. Thereafter, the fan motor rotation speed control means 75 performs a fan motor ON process (step S4) related to the activation of the internal fan motor 9.

  Further, the refrigerator operating state detection means 71 determines whether or not the freezer compartment damper or the refrigerator compartment damper related to the confirmation of the opening / closing operation start of each damper (freezer compartment cooling damper 50, refrigerator compartment cooling damper 20) has started ( Step S5) is performed. As a result of this determination, if any of the dampers has started an opening / closing operation, the fan motor rotational speed control means 75 performs the fan motor OFF (step S6) processing for stopping the internal fan motor 9, and then the refrigerator The operation state detection means 71 sets the damper operation end (step S7) related to the end of the opening / closing operation of each damper (freezer cooling fan 50, refrigeration chamber cooling damper 20). Subsequently, the fan motor rotational speed control means 75 performs the fan motor ON process (step S8) related to the activation of the internal fan motor 9 again, and then the fan motor rotational speed detection means 73 performs the storage after the damper opening / closing operation is completed. The fan motor actual rotation speed Nr detection (step S9) related to the rotation speed detection of the inner fan motor 9 is performed. Further, as a rotational speed correction value indicating the voltage applied to the internal fan motor 9 by the fan motor rotational speed correcting means 75 in response to this, the fan motor related to the rotational speed setting of the internal fan motor 9 before starting the damper opening / closing operation. Rotational speed difference calculation for calculating a difference value ΔN (= Nctl−Nr) obtained by subtracting the actual fan motor rotational speed Nr related to the rotational speed detection of the internal fan motor 9 after the damper opening / closing operation is completed from the rotational speed setting value Nctl (step) Based on the rotational speed correction value (difference value ΔN) obtained by performing S10), the fan motor rotational speed control means 75 performs fan motor rotational speed adjustment (step S11) related to rotational speed correction of the internal fan motor 9. Do.

  After this, normal refrigerator operation control (step S12) related to the normal cooling operation of the refrigerator 1 is performed by the refrigerator operation state detection means 71, and before the state reading of each sensor and drive component in the previous refrigerator 1 (step S2). Returning to step S4, the subsequent processing is repeated. As a result of the determination as to whether or not the previous freezer or refrigeration room damper has started the opening / closing operation (step S5), no damper has started the opening / closing operation. In addition, after jumping the above-described processes (steps S6 to S11) and performing the normal refrigerator operation control (step S12) related to the normal cooling operation of the refrigerator 1 in the same manner by the refrigerator operation state detection means 71, the previous refrigerator 1 It returns before each sensor and drive component state reading (step S2), and the subsequent processing is repeated.

  That is, according to the operation process of the control board 31 described with reference to FIG. 9, the rotation speed of the internal fan motor 9 is corrected each time the dampers (freezer cooling fan 50 and refrigerator cooling fan 20) are opened and closed. Since the adjustment control is performed, it is possible to suppress the deviation between the set rotational speed of the internal fan motor 9 and the actual rotational speed due to the change in the air path resistance, and the change in the ambient temperature of the internal fan motor 9 The change in the rotation speed of the internal fan motor 9 due to can be sufficiently suppressed. As a result, stable cooling capacity can be ensured more reliably, and power consumption can be sufficiently reduced.

  In addition, the basic structure of the refrigerator 1 which concerns on Example 1 demonstrated with reference to FIGS. 1-5 is an example to the last, and arrangement | positioning, layout, etc. of each storage room may differ with model types (types). Is well known, and there are various types of dampers having one or more than three, and therefore the refrigerator 1 of the present invention is not limited to the structure described in the first embodiment.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 3 Ice making room 4 Upper freezer room 5 Lower freezer room 6 Vegetable room 7 Cooler 8 Cooler storage room 9 Fan motor (blower)
DESCRIPTION OF SYMBOLS 10 Heat insulation box 11 Refrigerating room ventilation duct 12 Upper stage freezing room ventilation duct 13 Lower stage freezing room ventilation duct 15 Refrigerating room duct 16 Refrigerating room-vegetable room communication duct 17 Freezing room return port 18 Vegetable room return duct 18a Vegetable room return discharge port 19 Machine room 20 Cold room cooling damper 21 Evaporating dish 22 Defrost heater 23 樋
24 Compressor 26 Lower freezer compartment air duct 27 Drain pipe 28, 29 Insulation partition wall 31 Control board 33 Cold room temperature sensor 33a Vegetable room temperature sensor 34 Freezer room temperature sensor 35 Cooler temperature sensor 50 Freezer compartment cooling damper 53 Upper cover 54 Partition plate 71 Refrigerator operation state detection means 72 Fan motor rotation speed setting means 73 Fan motor rotation speed detection means 74 Fan motor rotation speed correction means 75 Fan motor rotation speed control means

Claims (4)

A plurality of storage chambers provided by partitioning the interior with a heat insulator, a cold air duct for blowing cool air to the plurality of storage chambers, a damper installed in the cold air duct for opening and closing, and a cool air A fan motor that cools air by circulating it through the cool air duct and circulating the air into the plurality of storage chambers; and further, a fan rotation speed setting means for setting a target rotation speed of the fan motor; and the fan Fan motor rotation speed detection means for detecting the rotation speed of the motor, and a difference value obtained by subtracting the rotation speed detected by the fan motor rotation speed detection means from the target rotation speed by the fan motor rotation speed setting means is calculated. Fan motor rotation speed correction means for calculating a rotation speed correction value based on the result, and a fan for adjusting and controlling the rotation speed of the fan motor based on the rotation speed correction value. And motor speed control means, a refrigerator having a
The fan rotation speed setting means sets the target rotation speed before starting the opening / closing operation of the damper, the fan motor rotation speed detection means detects the rotation speed of the fan motor after the opening / closing operation of the damper, The fan motor rotation speed correction means calculates the rotation speed correction value after completion of the damper opening / closing operation, and the fan motor rotation speed control means is based on the rotation speed correction value after completion of the damper opening / closing operation. The refrigerator characterized by adjusting the rotation speed of the fan motor.   2. The refrigerator according to claim 1, wherein a plurality of the dampers are installed, and the fan motor rotation speed detection unit detects the rotation speed of the fan motor after the opening / closing operation of any one of the plurality of dampers is completed. The fan motor rotation speed correction means calculates the rotation speed correction value after the opening / closing operation of any one of the plurality of dampers is completed.   3. The refrigerator according to claim 2, wherein the plurality of dampers are respectively installed in the refrigerator compartment and the freezer compartment, and the plurality of storage chambers are selectively and independently cooled by respective opening / closing patterns. A refrigerator characterized by that.   The refrigerator according to any one of claims 1 to 3, wherein the fan motor rotation speed control means controls the rotation speed of the fan motor by changing a voltage applied to the fan motor. refrigerator.