JP2004353972A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent dew formation and to reduce electric power consumption, by controlling quantity of power supply to the necessary minimum to a heater arranged for preventing the occurrence of dew formation in a vertical partition arranged for sealing double-leafed hinged form left-right doors. <P>SOLUTION: This refrigerator 100 has the doors 1a snd 1b of a cold room 5 in the double-leafed hinged form, and has the movable vertical partition 2 for sealing the reverse side of a butting part of both side doors. The vertical partition is provided with the heater 12 arranged for preventing the dew formation. The power supply quantity to this heater 12 is controlled, to be reduced for a low opening-closing frequency of the doors 1a and 1b, and to be increased for a high opening-closing frequency. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a refrigerator having a double-door type refrigerator compartment door.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 1 (a) and 1 (b), the upper side is a refrigeration section and the lower side is a freezing section, which is separated by an adiabatic partition. A refrigerator 100 having a movable vertical partition 2 for preventing outside air from entering between the doors 1a and 1b is known. In addition, 3 is a chilled room and 4 is a freezing room. The refrigerating compartment 5 and the chilled compartment 3 are divided into refrigerating compartments, and the freezing compartment 4 is divided into refrigerating compartments.
[0003]
As shown in FIG. 2, in such a refrigerator 100, the outside air and the cold air in the refrigerator are shut off by bringing the vertical partition 2 into close contact with the gaskets 11a and 11b. In the case of such a structure, the inside of the vertical partition 2 is cooled by the cool air in the refrigerating compartment 5, so that the outside temperature is also reduced by heat conduction, and moisture in the outside air is condensed on the outer surface of the vertical partition 2. In order to prevent this dew condensation, it is necessary to heat the vertical partition 2 to a temperature equal to or higher than the dew point temperature. However, since the vertical partition 2 is rotated by the hinge 13 with a built-in torsion spring when the door 1a is opened and closed, the surface is heated by disposing the heat radiating pipe in the partition like other fixed partitions, and the dew is formed. It cannot be heated to a temperature that does not occur. Therefore, the heater 12 is installed inside the vertical partition 2 and energized to heat the vertical partition 2 to prevent dew condensation.
[0004]
Conventionally, a method of supplying power to the heater in synchronization with the operation of the compressor or a method of controlling the heater based on the outside air temperature has been adopted (Patent Document 1).
[0005]
[Patent Document 1]
JP-A-6-3034
[0006]
[Problems to be solved by the invention]
However, in the conventional refrigerator, the amount of electricity supplied to the heater installed in the movable vertical partition is not finely controlled according to the refrigerator use condition, the control condition in the refrigerator, the outside air condition, and the like. However, there is a problem that the power consumption of the refrigerator is increased.
[0007]
The present invention has been made in view of such conventional problems, and relates to the relationship between the outside air temperature and the inside temperature, the amount of electricity supplied to a heater installed in a vertical partition or a gasket according to various conditions such as the opening and closing state of a door. Therefore, it is an object of the present invention to provide a refrigerator capable of preventing dew condensation without unnecessarily increasing the input of the heater and controlling power consumption more than before.
[0008]
[Means for Solving the Problems]
The refrigerator according to claim 1, wherein the refrigerator compartment door is a double-door type and has a movable vertical partition for sealing the back side of the abutting portion of both side doors, in order to prevent condensation on the vertical partition. And a heater control means for reducing input power to the heater of the vertical partition when the frequency of opening and closing of the door is low, as compared with when the frequency of opening and closing of the door is high.
[0009]
The invention according to claim 2 is a refrigerator having a refrigerator in which the door of the refrigerator compartment is a double-door type and has a movable vertical partition for sealing the back side of the abutting portion of the doors on both sides, in order to prevent dew condensation on the vertical partition. The provided heater, and a heater control means for increasing the input power of the heater of the vertical partition when the temperature difference is large than when the temperature difference is small, by the temperature difference between the inside temperature and the outside air temperature of the refrigerator compartment. It is provided.
[0010]
According to a third aspect of the present invention, in the refrigerator of the second aspect, the heater control means changes a correlation between the temperature difference and the input power according to the outside air temperature.
[0011]
A fourth aspect of the present invention is the refrigerator according to the third aspect, wherein the heater control means has a data table for determining the correlation.
[0012]
According to a fifth aspect of the present invention, there is provided a refrigerator provided with a movable vertical partition for closing a back side of a butt portion of both doors in a refrigerator in which a door of a refrigerator compartment is a double-door type, in order to prevent dew condensation on the vertical partition. The apparatus includes a heater provided and a heater control means for reducing the input power of the heater of the vertical partition during defrosting.
[0013]
The invention according to claim 6 is a refrigerator that has an evaporator and a blower fan for circulating cool air in each of a refrigeration compartment and a freezing compartment, and cools the inside of the refrigerator. In a refrigerator provided with a movable vertical partition for sealing the back side of the vertical partition, a heater provided for preventing dew condensation on the vertical partition, and the rotation speed of a blower fan for cooling the refrigerator compartment, the vertical Heater control means for controlling the input power of the heater of the partition.
[0014]
The invention according to claim 7 is a refrigerator comprising a refrigerator compartment evaporator, wherein the refrigerator compartment door is of a double-door type, and further comprising a movable vertical partition for sealing the back side of a butt portion of both side doors. The partition is provided with a heater provided to prevent dew condensation, and a heater control means for controlling the input power of the vertical partition heater based on the temperature of the refrigerator compartment evaporator.
[0015]
According to an eighth aspect of the present invention, in the refrigerator according to the seventh aspect, the heater control means determines the temperature of the evaporator for the refrigerator based on a signal from a temperature sensor installed in the evaporator for the refrigerator. It is assumed that.
[0016]
According to a ninth aspect of the present invention, in the refrigerator according to the seventh aspect, the heater control means estimates a temperature of the evaporator for the refrigerator compartment based on a rotation speed of a compressor of the refrigerator.
[0017]
According to a tenth aspect of the present invention, in the refrigerator of the first to ninth aspects, the heater control means controls the input power of the heater of the vertical partition by changing a duty ratio to the heater. is there.
[0018]
According to an eleventh aspect of the present invention, in the refrigerator of the first to tenth aspects, the heater whose input power is controlled is a heater provided on a gasket provided so as to be in direct contact with the butted end surfaces of the double doors. It is characterized by being.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0020]
<First Embodiment> The refrigerator 100 has the structure shown in FIGS. 1 and 2 as described in the conventional example, and the left and right doors 1a and 1b of the refrigerator compartment 5 are double-door type, and the doors 1a and 1b on both sides. The movable vertical partition 2 is provided by a hinge 13 with a built-in torsion spring in order to seal the back side of the butted portion. Gaskets 11a and 11b are attached to the rear surfaces of the ends of the left and right doors 1a and 1b so as to be in close contact with the surface of the vertical partition 2 on the outside air side. In the vertical partition 2, a heater 12 for preventing the dew condensation is provided.
[0021]
In the refrigerator 100 having such a structure, since the vertical partition 2 is located at the back between the left and right refrigerator compartment doors 1a and 1b, it is surrounded by the end faces of the doors 1a and 1b and the outside air side surface of the vertical partition 2. Air stagnates in the gap, and the exchange of air between the outside air outside the doors 1a and 1b is small. However, by opening and closing the left and right doors 1a and 1b of the double door, the air in the vicinity of the vertical partition 2 is replaced with the outside air, and new air comes into contact with the surface of the vertical partition 2, and dew condensation occurs there. I do. Further, when the door 1a on the side where the vertical partition 2 is installed is opened, the vertical partition 2 is directly exposed to the outside air.
[0022]
Thus, there is a correlation between the frequency of opening and closing the doors 1a and 1b and the input power of the heater 12 necessary for preventing dew condensation on the vertical partition 2. When the frequency of opening and closing the doors 1a and 1b is low, By controlling the input power of the heater 12 to be low and the input power to be high when the frequency of opening and closing is high, dew condensation can be prevented without unnecessarily increasing the heater input.
[0023]
Therefore, in the first embodiment, the heater control circuit shown in FIG. The heater control circuit receives a door opening / closing signal from a conventional door switch for turning on the interior lighting lamp in the door disclosure of the refrigerator 100, and counts the number of times the door is opened / closed. A heater control unit 22 that determines the opening / closing frequency from the door opening / closing count value and controls the input power to the heater 12, and a heater power supply 23 that controls the amount of power to the heater 12 in response to a control command from the heater control unit 22. Have been.
[0024]
In the refrigerator 100 according to the first embodiment, the heater control unit 22 controls the amount of power supplied to the heater by the control shown in the flowchart of FIG. 4 to reliably prevent the vertical partition 2 from dew condensation while suppressing power consumption.
[0025]
At the beginning of power-on, the heater control unit 22 instructs the heater power supply 23 to a preset normal energizing amount to energize the heater 12. Then, the control of the flowchart of FIG. 4 is repeated for a predetermined cycle, for example, every one minute or every five minutes.
[0026]
In the heater power control, the counter 21 counts the number of times the refrigerator doors 1a and 1b are opened and closed. The heater control unit 22 obtains the number of times the door has been opened and closed by the counter 21 in the past 10 minutes, and determines whether the frequency of opening and closing is large or small based on whether the number is larger or smaller than the comparison value n (step S1).
[0027]
If the number of times of opening / closing in the last 10 minutes is larger than the comparison value n and the frequency of opening / closing is determined to be high, the heater power supply is increased by a certain amount from the current power supply (step S2A).
[0028]
On the other hand, when it is determined that the number of times of opening / closing in the last 10 minutes is smaller than the comparison value n and the frequency of opening / closing is small, the heater energization amount is reduced by a certain amount from the previous value (step S2B).
[0029]
In some cases, the use state where the door opening / closing frequency is always high may continue. In such a case, an upper limit value of the heater power supply amount is set, and control is performed so that the heater power supply amount does not increase beyond the upper limit value. Also, a lower limit value is set for the heater power supply amount, and control is performed so that the heater power supply amount is not reduced below the lower limit value even when the opening / closing frequency is extremely low.
[0030]
As described above, in the refrigerator according to the first embodiment, by variably controlling the amount of electricity supplied to the heater in accordance with the frequency of opening and closing the door, it is possible to reliably prevent dew condensation on the vertical partition 2 while suppressing power consumption. it can.
[0031]
<Second Embodiment> Next, a refrigerator according to a second embodiment of the present invention will be described with reference to FIG. In the structure of the refrigerator 100 shown in FIGS. 1 and 2, in order to prevent dew condensation on the outer surface of the vertical partition 2, it is necessary to maintain the surface temperature higher than the dew point temperature of the air in the vicinity thereof. The dew point temperature varies depending on the temperature and humidity of the air, but is lower than the air temperature.
[0032]
Therefore, when controlling the surface temperature of the vertical partition 2 to be lower than the temperature outside the refrigerator by a certain temperature which is equal to or less than the temperature outside the refrigerator, the temperature between the outside air temperature and the temperature inside the refrigerator room 5 is controlled. By controlling the input power of the dew condensation preventing heater 12 based on the difference, it is possible to avoid unnecessary power supply to the heater and increase in power consumption.
[0033]
FIG. 5 shows a configuration of a heater control circuit in the refrigerator according to the second embodiment. The heater control circuit includes a refrigerator room temperature sensor 31, an outside air temperature sensor 32, a heater control unit 33 that controls the output of the heater power supply 23 based on a temperature difference Δt between the outside air temperature and the inside temperature of the refrigerator room 5, and It comprises a heater power supply 23 similar to that of the first embodiment.
[0034]
In the refrigerator according to the second embodiment, the heater control unit 33 calculates the input of the dew condensation preventing heater 12 by calculating P = α × Δt with respect to the temperature difference Δt between the outside air temperature and the inside temperature of the refrigerator compartment 5. The power is obtained and instructed to the heater power supply 23, and the heater power supply 23 controls the amount of current supplied to the heater 12 to the command value P. Thereby, in the refrigerator of the second embodiment, it is possible to avoid increasing the power consumption by supplying unnecessarily large electric power to the dew condensation prevention heater 12 of the vertical partition 2.
[0035]
<Third Embodiment> Next, a refrigerator according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a data table showing the correlation between the heater input and the ambient temperature (outside air temperature) of the refrigerator. The dew point temperature changes depending on the air temperature. Therefore, the dew point temperature corresponding to the maximum humidity assuming the environment in which the refrigerator 100 is installed also changes depending on the outside air temperature. Therefore, the target surface temperature of the vertical partition 2 differs depending on the outside air temperature.
[0036]
The refrigerator of the third embodiment has the same functional configuration as that of the second embodiment shown in FIG. 5, and the heater control unit 33 performs heater power control according to the flowchart of FIG. When the power of the refrigerator 100 is turned on, the heater control unit 33 repeats the control of the flowchart of FIG. 6 at a predetermined cycle. First, the outside air temperature is measured by the outside air temperature sensor 32 (step S11), and a dew point temperature tr at a humidity of 90% at the measured outside air temperature is obtained with reference to the built-in data table TBL1 shown in FIG. 7 (step S12). . Subsequently, a temperature difference between the obtained dew point temperature tr and the inside temperature measured by the refrigerator compartment temperature sensor 31 is calculated (step S13). If the temperature difference is equal to or more than 20 ° C., a 100% heater is calculated according to the data table TBL1. The power is controlled to 75% heater power in the range of 10 ° C. to 20 ° C., and to 50% heater power in the range of 10 ° C. or lower (step S14).
[0037]
According to the heater control in the third embodiment, the difference between the target temperature of the surface temperature of the vertical partition 2 and the outside temperature differs depending on the actual outside temperature, and the target temperature of the surface temperature is set by the outside temperature. However, by controlling the input power amount of the heater 12 in accordance therewith, power consumption is not increased, and dew condensation on the vertical partition 2 can be reliably prevented.
[0038]
<Fourth Embodiment> Next, a refrigerator according to a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a data table showing the correlation between the heater input with respect to the refrigerator ambient temperature (outside air temperature) and the humidity around the refrigerator. Normally, the humidity assumed in the environment in which the refrigerator 100 is installed can set a target for the outside air temperature. Therefore, in the refrigerator 100 of the fourth embodiment, the heater control unit 33 in the heater control circuit having the functional configuration shown in FIG. 5 has a data table TBL2 as shown in FIG. The target value tr 'of the surface temperature 2 is determined with reference to the table TBL2, and the surface temperature is determined so as to control the heater input so as not to increase the power consumption.
[0039]
This control will be described with reference to the flowchart of FIG. When the power of the refrigerator 100 is turned on, the heater control unit 33 repeats the control of the flowchart in FIG. 8 at a predetermined cycle. First, the outside air temperature is measured by the outside air temperature sensor 32 (step S21), the maximum humidity at the measured outside air temperature is obtained by referring to the built-in data table TBL2 shown in FIG. 9, and the dew point temperature tr 'at the maximum humidity is obtained. Is obtained (step S22). Subsequently, a temperature difference between the obtained dew point temperature tr 'and the refrigerator temperature measured by the refrigerator compartment temperature sensor 31 is calculated (step S23). If the temperature difference is equal to or more than 20 ° C., 100% of the temperature is calculated according to the data table TBL1. The heater power is controlled to be 75% when the temperature is in the range of 10 ° C. to 20 ° C., and to 50% when the temperature is 10 ° C. or less (step S24).
[0040]
According to the heater control in the fourth embodiment, the difference between the target surface temperature of the vertical partition 2 and the outside temperature differs depending on the actual outside temperature, and the target temperature of the surface temperature is set by the outside temperature. However, by controlling the input power amount of the heater 12 in accordance therewith, power consumption is not increased, and dew condensation on the vertical partition 2 can be reliably prevented.
[0041]
<Fifth Embodiment> Next, a refrigerator according to a fifth embodiment will be described with reference to FIGS. The cool air circulation type refrigerator performs defrosting by stopping the compressor in order to melt the frost accumulated in the evaporator at regular intervals. Of course, at that time, the inside of the refrigerator is not cooled, and the temperature in the refrigerator rises. Therefore, in this case, the required input to the heater 12 of the vertical partition 2 can be set low.
[0042]
Therefore, the refrigerator 100 of the fifth embodiment includes the heater control circuit shown in FIG. 10, and controls the input power to the heater 12 by the control of the flowchart of FIG. That is, the heater control unit 41 uses the signal during defrosting originally provided in the refrigerator, and reduces the input power to the heater 12 by a predetermined value according to the signal during defrosting when the refrigerator 100 is defrosting (step If no defrosting is being performed, control is performed to return the heater power to a normal value (steps S31 and S32B).
[0043]
Thus, in the heater control in the refrigerator 100 according to the fifth embodiment, the input power to the heater 12 of the vertical partition 2 is reduced by a certain width during the defrosting of the refrigerator 100, thereby making the heater 12 unnecessary. Excessive energization can be avoided, dew condensation on the vertical partition 2 can be prevented, and power consumption by the heater 12 can be reduced.
[0044]
<Sixth Embodiment> Next, a refrigerator according to a sixth embodiment of the present invention will be described with reference to FIGS. The refrigerator according to the sixth embodiment has the structure shown in FIGS. 1 and 2 and has a two-evaporator type refrigerator-freezer that has an evaporator and a fan for circulating cold air in each of a refrigeration compartment and a freezing compartment and cools the inside of the refrigerator. 100, the doors 1a and 1b of the refrigerator compartment 5 are of a double-door type, have a movable vertical partition 2, and are heated by a heater 12 to prevent dew condensation on the vertical partition 2. The heater control circuit shown has a function of controlling the input power of the heater 12 of the vertical partition 2 based on the number of rotations of the cooling fan for cooling the refrigerator compartment.
[0045]
In the refrigerator of this embodiment, each of the refrigerator compartment and the freezer compartment has a fan for circulating cool air, and circulates cool air in the refrigerator. The rear surface of the vertical partition 2 is cooled by cold air for cooling the refrigerator compartment, and the speed of the cold air hitting the rear surface of the vertical partition 2 of the cool air changes depending on the amount of cool air blown by the cooling fan for the refrigerator compartment. When the rotation speed of the cooling room cooling fan is high, the speed of the cool air is high, and when the rotation speed is low, the speed is low. The cooling amount of the vertical partition 2 changes depending on the number of rotations of the fan.
[0046]
Therefore, in the heater control circuit shown in FIG. 12, the heater control unit 51 normally inputs the rotation speed signal of the refrigerator compartment cooling fan from the refrigerating cycle control system provided in the refrigerator, and according to the rotation speed, The input power of the heater 12 is controlled by the control shown in the flowchart of FIG. That is, if the refrigerating compartment cooling fan rotates at a high speed as in the case of rapid cooling, the amount of cold air hitting the vertical partition 2 will be large, and the cooling will be strongly cooled. ). If the refrigerator compartment cooling fan is rotating at a medium speed as in the case of normal cooling, the amount of cold air hitting the vertical partition 2 is also moderate, so that it is not cooled as strongly as during rapid cooling. It is set (steps S43, S44). Then, when the cooling fan is at a low speed and stopped, the amount of cold air hitting the vertical partition 2 is small, so the input power of the heater 12 is set to the minimum (step S45).
[0047]
In the heater control according to the sixth embodiment, the input power of the heater 12 is controlled in accordance with the degree to which the vertical partition 2 is cooled. Can be prevented, and the power consumption by the heater 12 can be reduced.
[0048]
<Seventh Embodiment> Next, a refrigerator according to a seventh embodiment of the present invention will be described with reference to FIGS. In the refrigerator 100 having the structure as shown in FIGS. 1 and 2, the vertical partition 2 is cooled by cold air in the refrigerator and dew forms on the outer surface thereof. In a refrigerator of a cold air circulation type in a refrigerator, the inside of the refrigerator is cooled by circulating cold air having a low temperature by an evaporator of a refrigeration cycle into the refrigerator. Therefore, the temperature inside the refrigerator compartment of the vertical partition 2 is affected by the level of the temperature of the blown air of the cool air. Therefore, the heater control circuit in the refrigerator 100 of the present embodiment controls the surface temperature by controlling the heater input of the vertical partition by estimating the blown air temperature based on the temperature of the evaporator.
[0049]
The heater control circuit in the refrigerator 100 according to the seventh embodiment has a configuration shown in FIG. 14 and receives a signal from a temperature sensor of an evaporator conventionally provided in the refrigerator, and detects a temperature of cold air blown out of the refrigerator. A heater controller 61 for estimating and controlling the amount of electric power supplied to the heater is provided, and a heater power supply 23 for controlling the input power of the heater 12 in response to a command from the heater controller 61.
[0050]
As shown in the flowchart of FIG. 15, the heater control unit 61 starts this control routine when the power is turned on, and repeats the control in a fixed time cycle. Therefore, the evaporator temperature is input, and if the evaporator temperature is higher than the higher a ° C., it is estimated that the temperature of the cold air blown out to the refrigerator 5 is also high, and control is performed so that the amount of electricity supplied to the heater 12 is lower than usual ( Steps S51 and S52). If the evaporator temperature is in the middle temperature range, that is, if a ° C.> evaporator temperature> b ° C., the temperature of the cool air blown out to the refrigerator 5 is also estimated to be moderate, and the amount of electricity supplied to the heater 12 is approximately normal. (Steps S53 and S54). Then, if the evaporator temperature is lower and lower than b ° C., it is estimated that the temperature of the cool air blown out to the refrigerator 5 is also low, and control is performed so that the amount of electricity supplied to the heater 12 is higher than usual (step S55).
[0051]
If the heater control according to the seventh embodiment is performed, the input power of the heater 12 is controlled in accordance with the degree to which the vertical partition 2 is cooled, thereby eliminating wasteful power supply to the heater 12 more than necessary. Dew condensation on the partition 2 can be prevented, and power consumption by the heater 12 can be reduced.
[0052]
In general, the evaporator for cooling the refrigerator compartment of the refrigerating cycle of the refrigerator 100 is provided with a temperature sensor for detecting whether or not defrosting has been completed during defrosting. Therefore, the heater control unit 61 may be configured to estimate the temperature of the cool air blown out of the refrigerator compartment 5 by using the temperature sensor and control the input power to the vertical partition 2.
[0053]
<Eighth Embodiment> Next, an refrigerator according to an eighth embodiment of the present invention will be described with reference to FIGS. In the refrigerator 100 having the structure shown in FIGS. 1 and 2, the refrigerant evaporation temperature in the evaporator of the refrigeration cycle changes according to the refrigeration capacity of the refrigerant circulation compressor. When the refrigerating capacity is high, the temperature is low, and when the refrigerating capacity is low, the temperature is high. The temperature of the air that cools the inside of the refrigerator changes according to the evaporator temperature. For this reason, in the refrigerator 100 having the structure shown in FIGS. 1 and 2, in which the rotation speed of the compressor of the refrigeration cycle can be changed by the inverter, the refrigeration capacity is determined by the rotation speed of the compressor. Can be increased or decreased.
[0054]
Therefore, in the refrigerator of the eighth embodiment, the rotation speed signal of the compressor is taken in, the temperature of the evaporator is estimated based on the rotation speed, and the temperature of the cold air blown out of the refrigerator compartment 5 is also estimated. And a heater control circuit for controlling the input power to the vertical partition 2.
[0055]
FIG. 16 shows a functional configuration of a heater control circuit provided in the refrigerator of the present embodiment, which takes in a signal of the number of rotations of the compressor, estimates the temperature of the evaporator according to the magnitude of the number of rotations, A heater controller 71 that also estimates the temperature of cold air blown out of the refrigerator 5 and controls the input power to the vertical partition 2, and controls the input power to the heater 12 according to a command from the heater controller 71. And a heater power supply 23.
[0056]
As shown in the flowchart of FIG. 17, in the heater control circuit in the refrigerator 100 of the present embodiment, the heater control section 71 starts this control routine when the power is turned on, and repeats the control in a fixed time cycle. Therefore, a compressor speed signal is input, and if the compressor speed is higher than a preset value and the speed is high, the amount of power supplied to the heater 12 is controlled to the heater power set value at the time of high speed compressor rotation (step S61, S62). If the compressor rotation speed is within the preset medium speed range, the amount of electricity supplied to the heater 12 is controlled to the heater power set value during the compressor middle speed rotation (steps S63 and S64). If the compressor rotation speed is lower than the preset value, the amount of power to the heater 12 is controlled to the heater power set value at the time of low-speed rotation of the compressor (step S65).
[0057]
If the heater control according to the eighth embodiment is performed, the input power of the heater 12 is controlled in accordance with the degree to which the vertical partition 2 is cooled, thereby eliminating wasteful power supply to the heater 12 more than necessary. Dew condensation on the partition 2 can be prevented, and power consumption by the heater 12 can be reduced.
[0058]
<Ninth Embodiment> Next, a refrigerator according to a ninth embodiment of the present invention will be described with reference to FIG. In the first to eighth embodiments, the power consumption is reduced by controlling the input power to the heater 12 of the vertical partition 2 according to the refrigerator operating condition, the environment in which the refrigerator is installed, and the like. For controlling the input power to the heater 12, in addition to controlling the magnitude of the heater current, a control method of increasing or decreasing the input power by time-sharing the energization to the heater 12 as shown in FIG. Can also. In FIG. 18, the heater current is kept constant, a constant current is continuously supplied without interruption at 100% conduction, and the heater power is controlled to 50% by 50% time division at 50% control. At the time of% energization, the heater power is controlled to 25% by setting the energization time to 25%.
[0059]
<Tenth Embodiment> Next, a refrigerator according to a tenth embodiment of the present invention will be described with reference to FIG. In the first to ninth embodiments, the structure of the double doors 1a and 1b in the refrigerator compartment of the refrigerator 100 is as shown in FIGS. 1 and 2, and the vertical partition 2 is a butt portion of the doors 1a and 1b on both sides. 19 is provided on the back side (refrigerator compartment 5 side), and the heater 12 is installed on the back side. Instead of such a structure, the seal structure of the abutting portion of the double doors 1a and 1b is shown in FIG. The heater control of each embodiment can be equally applied to the configuration shown in FIG.
[0060]
The refrigerator 100 according to the tenth embodiment has a structure in which gaskets 15a and 15b are provided on the butting end faces of the left and right doors 1a and 1b, respectively, to directly seal the butting portions of the left and right doors 1a and 1b. Even in the refrigerator having such a structure, the gaskets 15a and 15b may be cooled by the cool air in the refrigerator, and there is a possibility that dew may condense near the surface on the outside air side. Therefore, the heater 12 is installed on these gaskets 15a and 15b, and the heater is energized and controlled by the same control circuit as in each of the above-described embodiments, thereby suppressing an increase in power consumption and preventing condensation. It is possible.
[0061]
【The invention's effect】
As described above, according to the present invention, there is provided a refrigerator in which a heater is installed in a vertical partition provided on the inner side of a compartment of a double door type left and right door abutting portion and electricity is supplied thereto to prevent dew condensation. By controlling the power according to the operating conditions of the refrigerator and the conditions of the installation environment, it is possible to prevent condensation on the surface of the vertical partition without applying unnecessary power to the heater, and to prevent condensation on the vertical partition. In addition, power consumption can be reduced.
[0062]
Further, according to the present invention, there is provided a refrigerator in which a gasket is provided on an end face of a butt portion between left and right doors of a double door type to seal the inside of a refrigerator, a heater is installed on the gasket, and electricity is supplied to the refrigerator to prevent dew condensation. By controlling the input power to the heater of the gasket according to the operating conditions of the refrigerator and the conditions of the installation environment, it is possible to prevent dew condensation on the surface of the gasket without supplying unnecessary power to the heater. The dew condensation of the gasket can be prevented, and the power consumption can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view and a horizontal sectional view of a refrigerator according to a first embodiment of the present invention.
FIG. 2 is an enlarged plan view of a refrigerator compartment door of the refrigerator according to the embodiment.
FIG. 3 is a block diagram of a heater control circuit in the refrigerator according to the embodiment.
FIG. 4 is a flowchart of heater control by the heater control circuit of the embodiment.
FIG. 5 is a block diagram of a heater control circuit in the refrigerator according to the second embodiment of the present invention.
FIG. 6 is a flowchart of heater control by a heater control circuit in a refrigerator according to a third embodiment of the present invention.
FIG. 7 is a data table provided in a heater control unit in the heater control circuit according to the embodiment.
FIG. 8 is a flowchart of heater control by a heater control circuit in a refrigerator according to a fourth embodiment of the present invention.
FIG. 9 is a data table provided in a heater control unit in the heater control circuit according to the embodiment.
FIG. 10 is a block diagram of a heater control circuit in a refrigerator according to a fifth embodiment of the present invention.
FIG. 11 is a flowchart of heater control by a heater control circuit in the refrigerator of the embodiment.
FIG. 12 is a block diagram of a heater control circuit in a refrigerator according to a sixth embodiment of the present invention.
FIG. 13 is a flowchart of heater control by a heater control circuit in the refrigerator of the embodiment.
FIG. 14 is a block diagram of a heater control circuit in a refrigerator according to a seventh embodiment of the present invention.
FIG. 15 is a flowchart of heater control by a heater control circuit in the refrigerator of the embodiment.
FIG. 16 is a block diagram of a heater control circuit in a refrigerator according to an eighth embodiment of the present invention.
FIG. 17 is a flowchart of heater control by a heater control circuit in the refrigerator of the embodiment.
FIG. 18 is a time charm of the heater power control by the refrigerator according to the ninth embodiment of the present invention.
FIG. 19 is an enlarged plan view of a refrigerator compartment door of a refrigerator according to a tenth embodiment of the present invention.
[Explanation of symbols]
100 refrigerator
1a, 1b door
2 vertical partitions
5 refrigerator room
11a, 11b gasket
12 heater
13 Hinge
21 Counter
22 Heater control unit
23 Heater power supply
31 Refrigerator temperature sensor
32 Outside temperature sensor
41, 51, 61, 71 heater control unit

Claims (11)

In a refrigerator having a refrigerator compartment door with a double door opening type and a movable vertical partition for sealing the back side of the butt portion of the doors on both sides,
A heater provided on the vertical partition to prevent the dew condensation,
A refrigerator comprising: heater control means for reducing input power to the heater of the vertical partition when the frequency of opening and closing of the door is low, as compared with when the frequency of opening and closing of the door is high. In a refrigerator having a refrigerator compartment door with a double door opening type and a movable vertical partition for sealing the back side of the butt portion of the doors on both sides,
A heater provided on the vertical partition to prevent the dew condensation,
Heater control means for increasing the input power of the heater of the vertical partition when the temperature difference is large compared to when the temperature difference is small, by a temperature difference between the inside temperature of the refrigerator compartment and the outside air temperature. Refrigerator. The refrigerator according to claim 2, wherein the heater control means changes a correlation between the temperature difference and input power according to the outside air temperature. The refrigerator according to claim 3, wherein the heater control means has a data table for determining the correlation. In a refrigerator having a refrigerator compartment door with a double door opening type and a movable vertical partition for sealing the back side of the butt portion of the doors on both sides,
A heater provided on the vertical partition to prevent the dew condensation,
A refrigerator comprising: heater control means for reducing input power to the vertical partition heater during defrosting. A refrigerator that has an evaporator and a blower fan for circulating cool air in each of the refrigeration compartment and the refrigeration compartment, and cools the inside of the refrigerator. In refrigerators with movable vertical partitions,
A heater provided on the vertical partition to prevent the dew condensation,
A refrigerator, comprising: heater control means for controlling the input power of the heater of the vertical partition according to the number of revolutions of the cooling fan for cooling the refrigerator compartment. A refrigerator having a refrigerator compartment evaporator, and a refrigerator having a movable vertical partition for sealing the back side of a butt portion of both side doors, wherein a door of the refrigerator compartment is a double door type,
A heater provided on the vertical partition to prevent the dew condensation,
A refrigerator comprising: a heater control unit that controls input power of the vertical partition heater according to a temperature of the refrigerator compartment evaporator. The refrigerator according to claim 7, wherein the heater control means determines the temperature of the refrigerator compartment evaporator based on a signal of a temperature sensor installed in the refrigerator compartment evaporator. The refrigerator according to claim 7, wherein the heater control means estimates the temperature of the refrigerator evaporator based on a rotation speed of a compressor of the refrigerator. The refrigerator according to any one of claims 1 to 9, wherein the heater control unit controls the input power of the heater of the vertical partition by changing a duty ratio of the heater. The refrigerator according to any one of claims 1 to 10, wherein the heater whose input power is controlled is a heater provided on a gasket provided so as to be in direct contact with the butted end surfaces of the double doors. A refrigerator characterized by the following.

Images