JP6223564B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator, and more particularly to a refrigerator provided with a freezing room and a storage room other than the freezing room (a storage room having a temperature range different from that of a freezing room such as a refrigeration room).

  2. Description of the Related Art Conventionally, a refrigerator including a freezing room and a storage room other than the freezing room (a storage room having a temperature range different from that of a freezing room such as a refrigerator room) is known. In such a conventional refrigerator, an evaporator (cooler) of a refrigeration cycle and an internal fan are installed in an air passage communicating with each storage room, and each storage is performed using one evaporator and one internal fan. The room is cooling. Specifically, when the freezer compartment becomes higher than the set temperature, the compressor and the internal fan of the refrigeration cycle are driven. In addition, when a storage room other than the freezing room becomes higher than the set temperature, the damper provided at the cold air supply port of the storage room is opened, the storage room is lowered below the set temperature, and then the damper is closed. Take control. For this reason, the conventional refrigerator provided with a freezer compartment and a storage room other than the freezer compartment has a reduced amount of cold air supplied to the freezer compartment when the damper is open even when the internal load is small. As a result, the temperature fluctuation of the compressor becomes large, and the drive time of the compressor becomes long to reduce the temperature of the freezer compartment, resulting in an increase in power consumption.

  Therefore, a conventional refrigerator provided with a freezing room and a storage room other than the freezing room is provided with a “main body, a refrigerating room that is formed in the main body and refrigerates food, in order to suppress temperature fluctuations in the freezing room and the like. A cooler that is disposed in a cooling chamber formed on the rear side of the main body, cools the air flowing through the cooling chamber to generate cool air, and a duct that feeds the cool air from the back side of the refrigerating chamber into the refrigerating chamber A cooling fan that adjusts the amount of cool air flowing from the cooling chamber to the duct, an outside air temperature detecting means that detects the outside air temperature, A refrigerating room temperature detecting means for detecting the internal temperature, and a control device for controlling the operation of the blower fan and the opening degree of the refrigerating room damper device, wherein the control device is controlled by the outside air temperature detecting means. Detected outside air The refrigerating room detected by the refrigerating room temperature detection means in a state where a specific opening is set for the opening of the refrigerating room damper device based on the actually measured outside air temperature and the blower fan is driven. When the measured temperature in the refrigerator compartment is higher than the set temperature in the first refrigerator compartment as a result of the comparison, the actual measured temperature in the refrigerator compartment, which is the internal temperature of the refrigerator, is compared with a predetermined first refrigerator compartment set temperature. In the state where the opening degree of the room damper device is fully opened and the blower fan is driven, the actual temperature of the refrigerator compartment is compared with a predetermined second refrigerator compartment temperature lower than the first refrigerator compartment preset temperature. As a result of the comparison, when the measured temperature in the refrigerator compartment is lower than the set temperature in the second refrigerator compartment, the opening degree of the damper device for the refrigerator compartment is set to the state of the specific opening degree ". (For example, See Patent Document 1).

Japanese Patent No. 5613284

  However, the refrigerator of patent document 1 adjusts the opening degree of a damper apparatus, and adjusts the air volume to a refrigerator compartment. In other words, the refrigerator described in Patent Document 1 operates the damper device as a resistance of the refrigerator compartment air path, and suppresses the air volume itself to the refrigerator compartment. As a result, the refrigerator described in Patent Document 1 reduces the degree of opening of the damper device when, for example, reducing the air volume to the refrigerator compartment, that is, the air path resistance increases, so each position in the refrigerator compartment An area where cold air cannot reach will occur. For this reason, the refrigerator described in Patent Document 1 has a problem that temperature distribution occurs in the refrigerator compartment, and in particular, the pocket shelf portion of the refrigerator compartment door portion is insufficiently cooled.

  The present invention has been made in order to solve the above-described problems, and is a refrigerator having one evaporator and one internal fan, and can reduce power consumption while suppressing temperature fluctuation of each storage room. It aims at obtaining the refrigerator which can reduce quantity.

  The refrigerator according to the present invention includes a freezing room and at least one storage room other than the freezing room, a refrigerating cycle having a compressor, a condenser, an expansion mechanism, and one evaporator, and the freezing room and the freezing room. An air passage in which the evaporator is disposed, and air that is provided in the air passage and is cooled by the evaporator is supplied to the freezer compartment and the storage compartments other than the freezer compartment. One internal fan, a damper provided at a supply port of the storage chamber other than the freezer compartment in the air passage, and a damper that opens and closes the supply port, and a control device that controls at least the damper based on an internal load And the control device is configured to check the internal load, and, when the internal load is equal to or less than a predetermined value, the supply port during a specified time which is a control interval of the damper. Opening time acquisition part to find the opening time to open A determination unit that determines whether or not a load in the freezer compartment and a load in the storage room other than the freezer compartment are greater than a specified value, and the supply during the specified time when the internal load is equal to or less than a specified value The damper is controlled so that the opening is opened only for the opening time, and when the load in the refrigerator is larger than a specified value, the supply port is set to the specified time when the load in the freezer compartment is larger than the specified value. The damper is controlled so as to be fully closed, and when the load of the storage room other than the freezer is larger than a specified value, the damper is controlled so that the supply port is fully opened for the specified time. A damper control unit.

  The present invention provides a storage room other than the freezer compartment by adjusting the opening time of the supply port during the specified time that is the control interval of the damper when the internal load is less than the specified value (when the internal load is small). Keep the temperature at the set temperature. That is, according to the present invention, only cool air having an air volume that keeps the temperature of the storage room constant is sent to a storage room other than the freezer room within a specified time, and temperature fluctuations of the storage room are suppressed. For this reason, the present invention can increase the amount of cold air supplied to the freezer compartment within a specified time when the internal load is small, so that the cooling capacity of the freezer compartment can be increased. For this reason, since the drive time of a compressor can be reduced rather than before, power consumption can be reduced rather than before. At this time, in the present invention, when the air volume to the storage room other than the freezing room is reduced, the time during which the supply port is open within the specified time may be shortened. For this reason, the present invention can prevent the occurrence of an area where cold air does not reach in the storage room other than the freezer compartment because the air path resistance does not increase when the air volume to the storage room other than the freezer room is reduced. It is also possible to prevent temperature distribution from occurring in the storage chamber other than the freezer.

  Further, according to the present invention, when the in-compartment load is larger than the specified value (when the in-compartment load is large), the supply port is fully closed for a specified time when the freezer compartment load is larger than the specified value. The damper is controlled so that when the load of the storage room other than the freezer compartment is larger than a specified value, the damper is controlled so that the supply port is fully opened for a specified time. For this reason, the present invention can suppress the temperature fluctuation of each storage room even when the internal load is larger than the specified value (stabilization and cooling performance can be maintained).

It is a figure explaining the structure of the refrigerating cycle of the refrigerator 100 which concerns on embodiment of this invention. It is the figure which showed the cold wind circuit of the refrigerator 100 which concerns on embodiment of this invention. It is a figure explaining regulation time CT of the refrigerator compartment damper 23 in the refrigerator 100 which concerns on embodiment of this invention. It is a flowchart until it performs open time control within the regulation time of the refrigerator compartment damper 23 in the refrigerator 100 which concerns on embodiment of this invention.

  Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

Embodiment.
FIG. 1 is a diagram illustrating a configuration of a refrigeration cycle of a refrigerator 100 according to an embodiment of the present invention. Based on FIG. 1, the structure of the refrigerating cycle of the refrigerator 100 is demonstrated.
The refrigerator 100 cools the inside of the refrigerator 100 to a set temperature using a vapor compression refrigeration cycle. In this refrigeration cycle, a compressor 11, a condensation pipe 14 and a dew condensation prevention pipe 15 as a condenser, a dryer 16, a capillary tube 17 as a decompression mechanism, and a single evaporator 18 as a cooler are connected by piping. Connected and configured. Further, the refrigeration cycle of the refrigerator 100 is provided with a heat exchange portion 19 for exchanging heat between the refrigerant flowing through the capillary tube 17 and the refrigerant flowing through a pipe (suction pipe) between the evaporator 18 and the compressor 11. Yes. The refrigeration cycle includes a temperature sensor 18a such as a thermistor that measures the refrigerant temperature on the inlet side of the evaporator 18, and a temperature sensor 18b such as a thermistor that measures the refrigerant temperature on the outlet side of the evaporator 18. Is provided.

  The compressor 11 is arrange | positioned, for example in the machine room provided in the back lower part of the refrigerator 100. FIG. The compressor 11 compresses the refrigerant into a high-temperature and high-pressure refrigerant, is driven by an inverter, and the operation capacity is controlled according to the situation.

  The condensing pipe 14 indicates a condensing pipe embedded in the top surface, side surface, back surface, and the like of the refrigerator 100 via a heat insulating material. The condensation pipe 14 also includes a hot pipe for drain evaporation.

  The condensation prevention pipe 15 is connected between the condensation pipe 14 and the dryer 16. This dew condensation prevention pipe 15 is provided for preventing dew condensation on the front portion of the refrigerator 100 main body.

  The dryer 16 is connected between the dew condensation prevention pipe 15 and the capillary tube 17. The dryer 16 includes a filter that prevents dust, metal powder, and the like in the refrigeration cycle of the refrigerator 100 from flowing into the compressor 11, an adsorption member that adsorbs moisture in the refrigeration cycle, and the like.

  The capillary tube 17 is connected between the dryer 16 and the evaporator 18. The capillary tube 17 acts as a pressure reducing mechanism for reducing the pressure of the refrigerant flowing through the dryer 16.

  The evaporator 18 is connected between the capillary tube 17 and the suction pipe side of the heat exchange portion 19. The evaporator 18 cools the air in the cabinet in an evaporator installation chamber provided on the back side of the refrigerator 100, for example. One internal fan 20 is provided above the evaporator 18, and cool air is supplied from the evaporator 18 by the internal fan 20, and the cool air is blown to each storage chamber.

  The heat exchanging portion 19 is a portion that exchanges heat between the refrigerant flowing through the capillary tube 17 and the refrigerant sucked into the compressor 11.

  Further, for example, a control device 10 including a microcomputer or the like for controlling the operation of the refrigerator 100 is provided on the upper surface of the refrigerator 100, for example. Moreover, the control apparatus 10 is provided with the internal load confirmation part 10a, the open time acquisition part 10b, the determination part 10c, and the damper control part 10d. The in-compartment load confirmation unit 10a confirms whether the in-compartment load of the refrigerator 100 is equal to or less than a specified value. The open time acquisition unit 10b obtains an open time for opening the supply port 2 of the refrigerator compartment 22 during a prescribed time which is a control interval of the refrigerator compartment damper 23 when the internal load is equal to or less than a prescribed value. The supply port 2 of the refrigerator compartment damper 23 and the refrigerator compartment 22 will be described later with reference to FIG. The determination part 10c determines whether the load of the freezer compartment 21 and the load of the refrigerator compartment 22 (storage rooms other than the freezer compartment 21) are larger than a regulation value. The damper control unit 10d controls the refrigerator compartment damper 23.

  In the refrigerator 100 configured as described above, the refrigerant that has become high temperature and pressure in the compressor 11 radiates heat to the outside air (or partially in the refrigerator) through the condensation pipe 14 and the dew condensation prevention pipe 15. The sufficiently radiated refrigerant is depressurized in the capillary tube 17 to become low-temperature and low-pressure, absorbs heat from the return air from each storage chamber in the evaporator 18 and is compressed again in the compressor 11 to become high-temperature and high-pressure.

FIG. 2 is a diagram showing a cold air circuit of refrigerator 100 according to the embodiment of the present invention.
The refrigerator 100 includes a freezer compartment 21 and a refrigerator compartment 22 as a storage compartment other than the freezer compartment 21. In FIG. 2, only two storage rooms, that is, the freezing room 21 and the refrigerating room 22 are illustrated, but in addition to this, an ice making room, a vegetable room, a switching room, and the like are arranged in parallel with the freezing room 21 and the refrigerating room 22 or It may be installed in series in the refrigerator compartment 22 (not shown). In FIG. 2, the refrigerator compartment 22 which is the storage chamber with the largest volume in the refrigerator 100 and the freezer compartment 21 with the lowest temperature zone will be described and described.

  The air passage 1 provided with the evaporator 18 and the internal fan 20 communicates with these storage chambers via a supply port. That is, the cool air (cooled air) cooled by the evaporator 18 is blown to each storage chamber by the internal fan 20. More specifically, the cold air from the internal fan 20 is branched to each storage room, a part of the total air volume is supplied to the freezing room 21, the other part is supplied to the refrigerating room 22, and returns to the evaporator 18 again.

  The supply port 2 of the refrigerator compartment 22 in the air path 1 is provided with a refrigerator compartment damper 23 that opens and closes the supply port 2. The refrigerator compartment damper 23 is configured such that the opening and closing are time-controlled by the control device 10. That is, the control device 10 can adjust (control) the opening time during which the supply port 2 opens during the specified time CT by controlling the opening time of the refrigerator compartment damper 23. That is, in the refrigerator compartment 22, the amount of cold air within the specified time CT is adjusted and the refrigerator compartment temperature is adjusted by controlling the opening time of the refrigerator compartment damper 23. Here, the temperature of the refrigerator compartment 22 is measured by a temperature sensor 22 b such as a thermistor provided in the refrigerator compartment 22. And the open time acquisition part 10b of the control apparatus 10 calculates | requires (predicts) the required open time within the regulation time CT of the refrigerator compartment damper 23 based on the measured temperature. That is, it is calculated (predicted) how long the supply port 2 can be opened within the specified time CT to keep the temperature of the refrigerator compartment 22 constant. Moreover, the damper control part 10d of the control apparatus 10 controls the refrigerator compartment damper 23 so that the supply port 2 opens only for the required opening time during the specified time CT. Here, the required opening time is predicted using a prediction technique such as PI control (proportional integral control). During the opening time, the opening ratio of the supply port 2 by the refrigerator compartment damper 23 is set to such an extent that the air path resistance becomes large and a region where the cold air does not reach in the refrigerator compartment 22 does not occur. The opening ratio of the supply port 2 by the refrigerator compartment damper 23 is set to fully open, for example.

Specifically, in the present embodiment, the required opening time within the specified time CT of the refrigerator compartment damper 23 is obtained using the following formula (1).
MV = Kp × [1+ {1 / (TI × S)}] × EV (1)
Here, MV is an operation amount, and is the open time of the refrigerator compartment damper 23 within the specified time CT. EV is a control deviation and is a difference between the set temperature of the refrigerator compartment 22 and the measured value of the temperature sensor 22b provided in the refrigerator compartment 22. Kp is a proportional gain, TI is an integration time, and S is a Laplace operator.

Further, the temperature of the freezer compartment 21 is measured by a temperature sensor 21 b such as a thermistor provided in the freezer compartment 21.
In addition, even when it has a damper in the supply port of the freezer compartment 21 in the air path 1, it is possible to have the effect of this invention.

  Next, the specified time CT will be described. The specified time CT is the minimum time of the control interval for the control device 10 to control the refrigerator compartment damper 23. Although the controllability is improved as the specified time CT is shorter, the specified time CT can be set to an arbitrary time.

  FIG. 3 is a diagram for explaining the prescribed time CT of the refrigerator compartment damper 23 in the refrigerator 100 according to the embodiment of the present invention. In addition, the horizontal axis of FIG. 3 has shown the regulation time CT, and has shown that regulation time CT becomes large as it goes to the right side. Moreover, the vertical axis | shaft of FIG. 3 has shown the input (input electric power), and has shown that an input becomes large as it goes upwards.

  As shown in FIG. 3, as the specified time CT is shorter (that is, the control interval is shorter), the number of times the refrigerator compartment damper 23 is driven increases. Therefore, the input necessary for opening and closing the refrigerator compartment damper 23 (the damper input in FIG. 3). ) Will increase. On the other hand, as the specified time CT is shorter, the temperature fluctuation of each storage room can be suppressed, and the air volume to the freezer room 21 increases as will be described later, so the average input of the compressor 11 (compressor input in FIG. 3) Will decline. For this reason, as shown in FIG. 3, the refrigerator 100 full input which is the sum total of the input of the drive device such as the refrigerator compartment damper 23 and the input of the compressor 11 has the minimum value. That is, the power consumption of the refrigerator 100 can be further reduced by operating the refrigerator compartment damper 23 for the specified time CT in which all inputs are minimized. For this reason, in the present embodiment, a specified time CT that minimizes all inputs is adopted. The specified time CT differs depending on the operating conditions, the internal volume, and the heat insulating structure of the refrigerator 100. Considering the number of driving times of the refrigerator compartment damper 23, the specified time CT is preferably about 5 minutes.

  Next, the opening time of the supply port 2 within the specified time CT when the refrigerator 100 is stable will be described. In addition, the stable time of the refrigerator 100 is a state in which the internal load described later is equal to or less than a specified value, that is, a state in which the internal load is smaller than the reference value.

  The control device 10 of the refrigerator 100 starts the compressor 11 when the freezer compartment 21 becomes equal to or higher than the set temperature, and stops when the temperature falls below the set temperature. In order to reduce the power consumption of the refrigerator 100, it is necessary to stop the compressor 11 that occupies most of all inputs. Therefore, by increasing the cooling capacity to the freezer compartment 21, that is, by increasing the amount of air supplied to the freezer compartment 21 as much as possible, the freezer compartment 21 is brought to the set temperature or less in a short time and the operation time of the compressor 11 is suppressed.

  In the conventional refrigerator, when the refrigerator compartment damper 23 is opened and closed, an air volume Qra for reducing the temperature of the refrigerator compartment 22 is supplied to the refrigerator compartment 22 when the refrigerator compartment damper 23 is opened. At this time, since the cold air is supplied to the freezer compartment 21 by Qfa = Q−Qra obtained by subtracting Qra from the total airflow Q, the temperature of the freezer compartment 21 is constant or rises.

  After the refrigerator compartment 22 is cooled to the set temperature, the refrigerator compartment damper 23 is closed, and the total air volume Q is blown into the freezer compartment 21, so that the refrigerator compartment 21 is cooled to the preset temperature, and then the compressor 11 is stopped. .

  On the other hand, in the refrigerator 100 according to the present embodiment, the control device 10 controls the open time during which the supply port 2 opens during the specified time CT by controlling the refrigerator compartment damper 23. That is, the refrigerator 100 according to the present embodiment supplies the refrigeration chamber 22 with the cold air of the air volume Qrb that keeps the temperature of the refrigeration chamber 22 constant for the specified time CT. As is apparent from the amount of temperature decrease in the refrigerator compartment 22, Qrb <Qra. As a result, in the present embodiment, the air volume to the freezer compartment 21 is Qfb = Q−Qrb and Qfb> Qfa. For this reason, the temperature of the freezer compartment 21 falls quickly with respect to the temperature change of the conventional freezer compartment 21. For this reason, as for the refrigerator 100 which concerns on this Embodiment, the inventors have obtained the result that the operation rate which shows the ratio of the driving | operation of the compressor 11 and a stop is improved conventionally. In addition, this reduction rate changes with the driving | running conditions, internal volume, and heat insulation structure of the refrigerator 100. FIG.

  Here, in the refrigerator 100 according to the present embodiment, when the supply amount (air volume) of the cold air to the refrigerator compartment 22 is reduced, the time during which the supply port 2 is open within the specified time CT may be shortened. For this reason, the refrigerator 100 according to the present embodiment prevents the occurrence of a region where the cold air does not reach in the refrigerator compartment 22 because the air path resistance does not increase when the air volume to the refrigerator compartment 22 is reduced. It is possible to prevent the temperature distribution from occurring in the refrigerator compartment 22.

  As described above, as the specified time CT is shorter, the constant temperature control of the refrigerator compartment 22 is possible. However, the number of operations of the refrigerator compartment damper 23 increases accordingly. For this reason, the drive input of the refrigerator compartment damper 23 increases, and the possibility that the refrigerator compartment damper 23 will be broken by a lifetime etc. increases. Moreover, if the frequency | count of operation | movement of the refrigerator compartment damper 23 increases, the emitted-heat amount of the motor which operates the refrigerator compartment damper 23 will also increase, and it will become an internal load, and the power consumption of the refrigerator 100 will increase. For this reason, the power consumption can be further reduced by adopting the specified time CT in which the total input of the refrigerator 100 is minimized. In addition, the inventors have obtained a further improvement result by performing the same control for the storage chambers other than the refrigerator compartment 22 described above.

  From the above, when the storage room including the refrigerator compartment 22 excluding the freezer compartment 21 is stable, the opening time during which the supply port 2 opens during the specified time CT is controlled, and the air volume to the freezer compartment 21 is increased. The amount of electric power can be reduced.

  In addition, although damper control of the refrigerator compartment 22 was described above, when a plurality of storage chambers perform the damper control at the same time, the temperature controllability of the storage chamber deteriorates due to disturbance during damper control of other storage chambers. there is a possibility. Therefore, it is desirable to start the control in order from the damper provided at the supply port (cold air supply port) of the storage room having a high set temperature. This is because the higher the set temperature, the higher the temperature of the air flowing into the evaporator 18 (cooler) and the greater the influence on the cold air temperature supplied from the evaporator 18 (cooler). It is.

  At this time, since the refrigerating room 22 is a storage room having the maximum internal capacity, the control of the refrigerating room damper 23 provided at the supply port 2 of the refrigerating room 22 is started first, and then the storage room having a high set temperature is started. You may start control in an order from the damper provided in the supply port (cold air supply port). As an example, in the refrigerator having the refrigerator compartment 22, the ice making room, the switching room, the freezer room 21, and the vegetable room, the order of control objects is described. In general, the storage room having the highest set temperature is the vegetable room, but the refrigerator room 22 has the largest volume of the storage room. Therefore, priority is given to the refrigerator compartment 22 as the highest priority. Next is a vegetable room with a high set temperature. Since the ice making room and the switching room can be adjusted to an arbitrary temperature according to user settings, the order is determined by the set temperature. However, since the ice making room is generally close to the freezing room, the priority is low.

  Next, an example of detecting the load in the refrigerator 100 will be described.

(1-1) Detection of in-compartment load based on operation state of compressor Compressor 11 of the present embodiment is controlled to be operated / stopped based on the temperature detected by temperature sensor 21b of freezer compartment 21. At the same time, during operation, the number of rotations is controlled according to the deviation state between the temperature of the freezer compartment 21 and the set temperature and the operation time. For this reason, it can be said that the operation state of the compressor 11 is one of the indexes indicating the overall cooling load of the refrigeration cycle of the refrigerator 100, that is, the internal load. Therefore, the rotation speed f of the compressor 11 or the input power W to the compressor 11 can be used as the internal load. When the rotation speed f of the compressor 11 is larger than a predetermined threshold value (when the input power W is large), the internal load is high and the rotation speed of the compressor 11 is smaller than the predetermined threshold value (input power). When W is small, the in-compartment load is low. The control device 10 acquires the rotation speed f or the input power W acquired when controlling the operation of the compressor 11, and compares the value with a threshold value stored in advance in the microcomputer, whereby the load in the warehouse is a threshold value. It is determined whether or not Qa (specified value) or less. The internal load confirmation unit 10a determines whether or not the internal load is equal to or less than the threshold value Qa (specified value).

(1-2) Detection of in-compartment load based on evaporator inlet / outlet temperature difference The high temperature of the air flowing into the evaporator 18 according to the present embodiment indicates that the in-compartment load is large. In this case, a temperature difference ΔTe is generated between the refrigerant on the outlet side and the inlet side of the evaporator 18. For this reason, it can be said that the temperature difference ΔTe between the outlet side and the inlet side of the evaporator 18 is one of indexes indicating the overall cooling load of the refrigeration cycle of the refrigerator 100, that is, the internal load. Therefore, the temperature difference ΔTe between the outlet side and the inlet side of the evaporator 18 can be used as the internal load. The control device 10 acquires outputs from the temperature sensor 18a provided on the inlet side of the evaporator 18 and the temperature sensor 18b provided on the outlet side, and the temperature difference ΔTe and a threshold value stored in advance in the microcomputer. Is compared to determine whether or not the internal load is equal to or less than the threshold value Qa. The internal load confirmation unit 10a determines whether or not the internal load using the temperature sensors 18a and 18b is equal to or less than a threshold value Qa (specified value).

(1-3) Detection of inside load based on door opening / closing frequency Rr of refrigerator compartment When the door 22a of the refrigerator compartment 22 is opened, outside air flows into the refrigerator compartment 22 and cold air flows out to the outside. The temperature rises and the cooling load increases. The refrigerator compartment 22 is an area having the largest volume in the refrigerator 100, and the amount of cold air necessary for cooling the refrigerator compartment 22 to a predetermined temperature is also increased. For this reason, it can be said that the door opening / closing frequency Rr of the refrigerator compartment 22 is one of the indexes indicating the overall cooling load of the refrigeration cycle of the refrigerator 100, that is, the load in the warehouse. Therefore, the door opening / closing frequency Rr per unit time can be used as the internal load. The control device 10 receives the output from the door opening / closing sensor 22c of the refrigerator compartment 22, counts the door opening / closing frequency Rr per unit time, and compares the predetermined threshold stored in the microcomputer in advance with the door opening / closing frequency Rr. Thus, it is determined whether the internal load is equal to or less than the threshold value Qa. The internal load confirmation unit 10a determines whether or not the internal load using the door opening / closing sensor 22c of the refrigerator compartment 22 is equal to or less than a threshold value Qa (specified value).

(1-4) Detection of in-compartment load based on door opening / closing frequency Rf of freezer compartment Similarly, the door opening / closing frequency Rf of the door 21a of the freezing chamber 21 is also the overall cooling load of the refrigeration cycle of the refrigerator 100, that is, the warehouse. It can be said that it is one of the indexes indicating the internal load. That is, as described above, the operation and stop of the compressor 11 of the present embodiment are controlled based on the temperature detected by the temperature sensor 21b of the freezer compartment 21. Therefore, the door opening / closing frequency Rf per unit time can be used as the internal load in the same manner as the door opening / closing frequency Rr in the refrigerator compartment 22. The internal load confirmation unit 10a determines whether the internal load using the door opening / closing sensor 21c provided in the freezer compartment 21 is equal to or less than a threshold value Qa (specified value).

(1-5) Detection of inside load based on door opening time τr of refrigerator compartment As described above, when the door 22a of the refrigerator compartment 22 is opened, the temperature of the refrigerator compartment 22 rises and the cooling load increases. For this reason, the door opening time τr of the refrigerating room 22 (accumulated time of the time when the door 22a is opened per unit time) is an index indicating the overall cooling load of the refrigeration cycle of the refrigerator 100, that is, the load in the warehouse. It can be said that it is one. Therefore, the door opening time τr of the refrigerator compartment 22 can be used as the internal load. In response to the output from the door opening / closing sensor 22c, the control device 10 counts and accumulates the time during which the door 22a is opened. Then, by comparing the door opening time τr per unit time with a predetermined threshold value stored in advance in the microcomputer, it is determined whether or not the internal load is equal to or less than the threshold value Qa. The internal load confirmation unit 10a determines whether the internal load using the door opening / closing sensor 22c provided in the refrigerator compartment 22 is equal to or less than a threshold value Qa (specified value).

(1-6) Detection of in-compartment load based on door opening time τf of freezer room Similarly, the door opening time τf of the door 21a of the freezing room 21 is also the overall cooling load of the refrigeration cycle of the refrigerator 100, that is, the warehouse. It can be said that it is one of the indexes indicating the internal load. Therefore, the door opening time τf per unit time can be used as the internal load in the same manner as the door opening time τr in the refrigerator compartment 22. The internal load confirmation unit 10a determines whether the internal load using the door opening / closing sensor 21c provided in the freezer compartment 21 is equal to or less than a threshold value Qa (specified value).

(1-7) Detection of internal load based on refrigerator compartment temperature Tr It can be said that the higher the temperature detected by the temperature sensor 22b provided in the refrigerator compartment 22, the greater the internal load of the refrigerator compartment 22. Therefore, the refrigerator compartment temperature Tr can be used as the internal load. The control device 10 receives the output from the temperature sensor 22b of the refrigerating room 22 and compares the refrigerating room temperature Tr with a predetermined threshold value stored in advance in the microcomputer, so that the internal load is equal to or lower than the threshold value Qa. Determine whether or not. The internal load confirmation unit 10a determines whether the internal load using the temperature sensor 22b provided in the refrigerator compartment 22 is equal to or less than a threshold value Qa (specified value).

(1-8) Detection of internal load based on amount of temperature decrease in freezer compartment When the freezer compartment 21 has a relatively high temperature and a large amount of food is charged, the temperature reduction speed of the freezer compartment 21 is slow. Tend to be. In such a case, it can be said that the cooling load in the freezer compartment 21 is large. Therefore, the amount of temperature drop in the freezer compartment 21 per unit time can be used as the internal load. The control device 10 receives an output from the temperature sensor 21b of the freezer compartment 21 and calculates a temperature decrease amount per unit time, and compares the temperature decrease amount with a predetermined threshold value stored in advance in the microcomputer. Then, it is determined whether or not the internal load is equal to or less than the threshold value Qa. The internal load confirmation unit 10a determines whether the internal load using the temperature sensor 21b provided in the freezer compartment 21 is equal to or less than a threshold value Qa (specified value).

  Any of the detection examples of the in-compartment load detecting means described above can be realized without providing additional parts, and the number of parts of the refrigerator 100 is not increased.

  Next, control of the refrigerating room damper 23 in a state where the above-mentioned load in the store is larger than the threshold value Qa (specified value) will be described. When detecting that the load in the refrigerator is larger than the threshold value Qa (specified value), the control device 10 of the refrigerator 100 controls the refrigerator compartment damper 23 according to the flow shown in FIG. FIG. 4 is a flow chart until the open time control within the specified time CT of the refrigerator compartment damper 23 at the stable time in the refrigerator 100 according to the embodiment of the present invention, but storage other than the refrigerator compartment is performed. By performing the same determination for the room, the open time control at the stable time in the refrigerator 100 according to the present embodiment is established.

  When the internal load is larger than the threshold value Qa (specified value) (step S1), the control device 10 compares the refrigerating room temperature Tr of the refrigerating room 22 with the set temperature Trm (step S2). This comparison is performed by the determination unit 10c of the control device 10. When Tr ≦ Trm, the internal load is not the refrigerator compartment 22 but the freezer compartment 21, that is, the load of the freezer compartment 21 is larger than the specified value. Therefore, the damper controller 10d of the control device 10 The chamber damper 23 is controlled so that the supply port 2 is always closed (fully closed) during the specified time CT (step S3). As a result, almost the entire air volume from the internal fan 20 of the refrigerator 100 can be supplied to the freezer compartment 21, and the freezer compartment 21 can be cooled to the set temperature by quickly dealing with the load. At this time, the cooling speed may be increased by simultaneously increasing the rotational speed of at least one of the internal fan 20 and the compressor 11 (No in step S4 to step S5).

  After the freezer compartment 21 is cooled to the set temperature (Yes in Step S4), the damper control unit 10d of the control device 10 performs the same control as that in the stable state for the refrigerator compartment damper 23 (Step S6).

  On the other hand, when Tr> Trm in step S2, the internal load is in the refrigerator compartment 22, that is, the load in the refrigerator compartment 22 is larger than the specified value, so that the damper controller 10d of the control device 10 The chamber damper 23 is controlled so that the supply port 2 is always fully opened during the specified time CT (step S11). As a result, the load on the refrigerator compartment 22 is dealt with, and the refrigerator compartment 22 is cooled to the set temperature. At this time, the cooling speed may be increased by simultaneously increasing the rotational speed of at least one of the internal fan 20 and the compressor 11 (No from step S12 to step S13). After the freezer compartment 21 is cooled to the set temperature (Yes in Step S12), the damper control unit 10d of the control device 10 performs the same control as that in the stable state on the refrigerator compartment damper 23 (Step S14).

  As described above, in refrigerator 100 according to the present embodiment, when the in-compartment load is equal to or less than the specified value (when the in-compartment load is small), the time for the supply port to open during the specified time that is the damper control interval. By adjusting the above, the temperature of the storage room other than the freezer compartment 21 is kept at the preset temperature so that the supply port of the storage room other than the freezer compartment 21 is opened and closed by the preset temperature. That is, the refrigerator 100 according to the present embodiment sends only cool air of an air volume that keeps the temperature of the storage room constant for a specified time CT to the storage rooms other than the freezing room 21, and the temperature of the storage room Suppress fluctuations. For this reason, since the refrigerator 100 which concerns on this Embodiment can increase the supply amount of the cold air to the freezer compartment 21 compared with the past, when the load in a warehouse is small, it can suppress the temperature fluctuation of the freezer compartment 21. FIG. For this reason, since the drive time of the compressor 11 can be reduced compared with the past, power consumption can be reduced compared with the past.

  At this time, in the refrigerator 100 according to the present embodiment, when the air volume to the storage room other than the freezer room 21 is reduced, the time during which the supply port is open within the specified time CT may be shortened. For this reason, the refrigerator 100 according to the present embodiment does not increase the air path resistance when reducing the air volume to the storage room other than the freezing room 21, so that there is an area where cold air does not reach in the storage room other than the freezing room 21. Generation | occurrence | production can be prevented, and it can also prevent that temperature distribution generate | occur | produces in storage rooms other than the freezer compartment 21. FIG.

  In addition, in refrigerator 100 according to the present embodiment, when the in-compartment load is larger than a specified value (when the in-compartment load is large), when the load in freezer compartment 21 is larger than the specified value, the supply port has a specified time. The damper is controlled so as to be fully closed during the period, and when the load of the storage room other than the freezing room 21 is larger than the specified value, the damper is controlled so that the supply port is fully opened during the specified time. For this reason, the refrigerator 100 which concerns on this Embodiment can suppress the temperature fluctuation of each storeroom, even when the load in a warehouse is larger than a regulation value (it can maintain stabilization and cooling performance). .

DESCRIPTION OF SYMBOLS 1 Air path, 2 Supply port, 10 Control apparatus, 10a Internal load confirmation part, 10b Open time acquisition part, 10c Judgment part, 10d Damper control part, 11 Compressor, 14 Condensation pipe, 15
Condensation prevention pipe, 16 dryer, 17 capillary tube, 18 evaporator, 18a temperature sensor, 18b temperature sensor, 19 heat exchanging part, 20 fan in chamber, 21
Freezer room, 21a door, 21b temperature sensor, 21c door open / close sensor, 22 refrigerator compartment, 22a door, 22b temperature sensor, 22c door open / close sensor, 23 refrigerator compartment damper, 100 refrigerator.

Claims (13)

A freezing room and at least one storage room other than the freezing room;
A refrigeration cycle having a compressor, a condenser, an expansion mechanism, and one evaporator;
Communicating with the freezer compartment and the storage compartment other than the freezer compartment, and an air passage in which the evaporator is disposed;
One internal fan that is provided in the air passage and supplies the air cooled by the evaporator to the freezer and the storage room other than the freezer;
A damper provided at a supply port of the storage chamber other than the freezing chamber in the air path, and opening and closing the supply port;
A control device for controlling at least the damper based on the load in the cabinet;
With
The controller is
An internal load confirmation unit for confirming the internal load;
When the internal load is equal to or less than a specified value, an opening time acquisition unit that calculates an opening time for opening the supply port during a specified time that is a control interval of the damper;
A determination unit for determining whether a load of the freezer compartment and a load of the storage compartment other than the freezer compartment are greater than a specified value;
When the internal load is less than a specified value, the damper is controlled so that the supply port opens only during the specified time during the specified time,
When the internal load is larger than a specified value, the damper is controlled so that the supply port is fully closed during the specified time when the freezer load is larger than a specified value, A damper control unit that controls the damper so that the supply port is fully open during the specified time when the load of the storage chamber other than is greater than a specified value;
Refrigerator equipped with. The refrigerator according to claim 1,
The specified time is a refrigerator in which all inputs of the refrigerator are minimized. A plurality of the storage chambers and the dampers other than the freezing chamber,
The storage room other than the freezer room is a refrigeration room and at least one storage room different from the refrigeration room,
The damper control unit
First, control of the damper provided at the supply port of the refrigerator compartment is started, and then control of the damper provided at the supply port of the storage chamber different from the refrigerator compartment is started. The refrigerator according to claim 1 or 2. A plurality of the storage rooms different from the refrigeration room,
The damper control unit
The refrigerator according to claim 3, wherein when controlling the damper provided in the supply port of the storage chamber, the control is started in order from the damper corresponding to the storage chamber having a high set temperature. A plurality of the storage chambers and the dampers other than the freezing chamber,
The refrigerator according to claim 1 or 2, wherein the damper control unit is configured to start control in order from the damper provided at the supply port of the storage chamber having a high set temperature. A temperature sensor for detecting the temperature of the storage chamber other than the freezer;
The determination unit
In a state where the internal load is larger than a specified value, the temperature detected by the temperature sensor is compared with a specified value,
When the detected temperature of the temperature sensor is less than or equal to a specified value, it is determined that the freezer load is greater than a specified value,
6. The configuration according to claim 1, wherein when the detected temperature of the temperature sensor is higher than a specified value, the load of the storage room other than the freezer is determined to be higher than a specified value. Refrigerator.   The said internal load confirmation part is the structure which confirms the said internal load based on the rotation speed of the said compressor, or the input electric power of the said compressor. refrigerator. A temperature sensor for measuring the refrigerant temperature on the inlet side of the evaporator;
A temperature sensor for measuring the refrigerant temperature on the outlet side of the evaporator;
With
7. The internal load confirmation unit is configured to confirm the internal load based on a temperature difference between the refrigerant on the outlet side and the refrigerant on the inlet side of the evaporator. The refrigerator according to item. A door opening / closing sensor for detecting an opening / closing state of the door of the storage room;
The refrigerator according to any one of claims 1 to 6, wherein the internal load confirmation unit is configured to confirm the internal load based on the number of times the door is opened and closed per unit time. A door opening / closing sensor for detecting an opening / closing state of the door of the storage room;
The refrigerator according to any one of claims 1 to 6, wherein the internal load confirmation unit is configured to confirm the internal load based on an accumulated opening time per unit time of the door. A temperature sensor for detecting the temperature of the storage chamber other than the freezer;
The refrigerator according to any one of claims 1 to 6, wherein the internal load confirmation unit is configured to confirm the internal load based on a temperature of the storage chamber. A freezer temperature sensor for detecting the temperature of the freezer;
The refrigerator according to any one of claims 1 to 6, wherein the internal load confirmation unit is configured to confirm the internal load based on a temperature decrease amount per unit time of the freezer. The controller is
The refrigerator according to any one of claims 1 to 12, wherein when the internal load is larger than a specified value, the rotational speed of at least one of the compressor and the internal fan is increased. .

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