JP2016011830A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator that is not mounted with a damper for temperature control over a cold room and that eliminates the need to manually open and close a shutter etc., by a user and is high in usability.SOLUTION: A refrigerator 1 includes: a cold room 4; a freezing room 3; a compressor 10 which performs a freezing cycle; an evaporator 7 which is connected to the compressor 10 to generate cold air; an air blower 8 which sends the cold air generated by the evaporator 7 out to the cold room 4 and freezing room 3; and a cold room temperature detection part 12; and an outside air temperature detection part 11. The refrigerator drives the compressor 10 and air blower 8 when a temperature detected by the cold room temperature detection part 12 reaches a predetermined first upper-limit temperature to cool the cold room 4 and freezing room 3 simultaneously, and stops the compressor 10 and air blower 8 when the temperature reaches a predetermined first lower-limit temperature. The refrigerator 1 has higher cooling capability for the cold room 4 and freezing room 3 in a first cooling mode in which the outside air temperature is lower than a predetermined first switching temperature than in a second cooling mode in which the outside air temperature is equal to or higher than the first switching temperature.

Description

  The present invention relates to a refrigerator.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator is provided with a shutter for increasing / decreasing the opening area of a duct in a duct for circulating cold air in a refrigerator compartment. Then, by opening and closing the shutter, the amount of cool air circulation in the refrigerator compartment is increased or decreased to control the operation time of the compressor, thereby adjusting the temperature of the freezer compartment. Thereby, the cheap refrigerator which does not mount the temperature sensor for freezers, or the damper for temperature control of a refrigerator compartment is provided.

JP-A-10-170127

  However, in the conventional refrigerator, the user has to manually open and close the shutter according to changes in the outside air temperature. For example, if the outside air temperature is relatively lowered in winter and the outside air temperature and the temperature in the refrigerator compartment are close, the operating rate of the compressor of the refrigerator is lowered and the freezer compartment does not fall to a preset target temperature. There was a risk of it occurring. Therefore, it is necessary for the user to manually open and close the shutter, and there is a problem that it is troublesome and unusable.

  The present invention has been made in view of the above points, and in a refrigerator not equipped with a damper for adjusting the temperature of the refrigerator compartment, it is not necessary for the user to manually open and close the shutter and the like, and a refrigerator that is easy to use is provided. The purpose is to do.

  In order to solve the above problems, the present invention provides a refrigerator compartment for storing stored items in a refrigerator, a refrigerator chamber for storing stored items in a frozen state, a compressor for operating a refrigeration cycle, and cooling air connected to the compressor. An evaporator to be generated, a blower for sending cold air generated by the evaporator to the refrigerator compartment and the freezer compartment, a refrigerator compartment temperature detector for detecting the temperature of the refrigerator compartment, and an outside temperature detector for detecting an outside temperature And when the detected temperature of the refrigerator compartment temperature detector reaches a predetermined first upper limit temperature, the compressor and the blower are driven to simultaneously cool the refrigerator compartment and the freezer compartment. In the refrigerator that stops the compressor and the blower when the lower limit temperature is reached, the refrigeration is performed in the first cooling mode in which the outside air temperature is lower than a predetermined switching temperature than in the second cooling mode in which the outside temperature is higher than the switching temperature. Room and said freezing room It is characterized by a high cooling capacity against.

  Moreover, the refrigerator having the above-described configuration is characterized in that the rotational speed of the compressor in the first cooling mode is larger than that in the second cooling mode.

  Moreover, the refrigerator of the said structure WHEREIN: The rotation speed of the said air blower of 1st cooling mode is larger than 2nd cooling mode, It is characterized by the above-mentioned.

  In the refrigerator configured as described above, the outside air temperature detecting unit detects the outside air temperature based on the off time of the compressor, and determines that the outside air temperature is lower than the switching temperature when the off time is longer than a predetermined time. When the temperature is short, the outside air temperature is determined to be higher than the switching temperature.

  In the refrigerator having the above-described configuration, the flow path resistance of the path for discharging cool air from the blower to the freezer compartment is smaller than the flow path resistance of the path for discharging cool air to the refrigerating room.

  Moreover, the refrigerator having the above-described configuration is characterized in that the amount of cool air discharged to the freezer compartment by the blower is larger than the amount of cool air discharged to the refrigerator compartment.

  The refrigerator configured as described above further includes an evaporator temperature detector for detecting the temperature of the evaporator and controlling the defrosting operation of the evaporator, and the detected temperature of the evaporator temperature detector is a predetermined evaporation. When the temperature reaches the upper limit temperature of the refrigerator and the temperature detected by the refrigerator temperature detection unit is higher than the first lower limit temperature or higher than the second upper limit temperature between the first upper limit temperature and the first lower limit temperature And driving the compressor and the blower.

  The refrigerator having the above-described configuration further includes a freezer compartment temperature detecting unit that detects the temperature of the freezer compartment, and the temperature detected by the freezer compartment temperature detecting unit reaches a predetermined freezer compartment upper limit temperature and the refrigerator compartment temperature detecting unit. When the detected temperature is higher than the first lower limit temperature, the compressor and the blower are driven.

  According to the configuration of the present invention, in a refrigerator in which a damper for adjusting the temperature of the refrigerator compartment is not mounted, it is not necessary for the user to manually open and close the shutter and the like, and a refrigerator that is easy to use can be provided.

It is a vertical section side view of the refrigerator of a 1st embodiment of the present invention. It is a front view of the refrigerator of 1st Embodiment of this invention. It is a block diagram which shows the structure of the refrigerator of 1st Embodiment of this invention. It is explanatory drawing of the drive control of the compressor and fan of the refrigerator of 1st Embodiment of this invention. It is a graph which shows the temperature transition of the refrigerator compartment of the refrigerator of 1st Embodiment of this invention. It is a graph for demonstrating the cooling control corresponding to the external temperature of the refrigerator of 1st Embodiment of this invention. It is a graph which shows the temperature transition of the refrigerator compartment of the refrigerator of 1st Embodiment of this invention, and a freezer compartment. It is a graph which shows the temperature transition of the refrigerator compartment of the refrigerator of 1st Embodiment of this invention, and a freezer compartment. It is a graph for demonstrating the cooling control corresponding to the external temperature of the refrigerator of 2nd Embodiment of this invention. It is explanatory drawing of the drive control of the compressor and air blower of the refrigerator of 3rd Embodiment of this invention. It is explanatory drawing of the drive control of the compressor and air blower of the refrigerator of 4th Embodiment of this invention. It is a graph for demonstrating the temperature of the refrigerator compartment and freezer compartment corresponding to the external temperature of the refrigerator of 3rd and 4th embodiment of this invention. It is a block diagram which shows the structure of the refrigerator of 5th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

<First Embodiment>
Initially, the structure and operation | movement outline | summary are demonstrated about the refrigerator of 1st Embodiment of this invention using FIGS. 1-3. 1 and 2 are a vertical sectional side view and a front view of the refrigerator, and FIG. 3 is a block diagram showing a configuration of the refrigerator. In FIG. 1, the left side is the front side of the refrigerator, and the right side is the back side of the refrigerator. Moreover, FIG.1 and FIG.2 has abbreviate | omitted drawing of the partition board between the door provided in the front of a refrigerator, and the cold air | gas channel | path provided in the back side inside a freezer compartment and a refrigerator compartment.

  The refrigerator 1 includes a main body housing 2 having a heat insulating structure as shown in FIGS. 1 and 2. The main body housing 2 is provided with a freezer compartment 3 for storing stored foods and the like in the upper stage, and a refrigerator compartment 4 for refrigerated storage in the lower stage. The front surfaces of the freezer compartment 3 and the refrigerator compartment 4 are opened and closed by doors (not shown) having separate heat insulation structures. The freezer compartment 3 and the refrigerator compartment 4 are partitioned by a partition portion 5.

  A cool air passage 6 extending in the vertical direction in the refrigerator is provided behind the freezer compartment 3. An evaporator 7 that is a cooler and a blower 8 are arranged inside the cool air passage 6. The blower 8 is disposed downstream of the evaporator 7 in the cold air flow direction. The cold air passage 6 branches into a path 6 </ b> F for discharging cool air to the freezer compartment 3 and a path 6 </ b> R for discharging cool air to the refrigerator compartment 4 on the downstream side of the blower 8. The path 6F is provided with a cold air discharge port 6a for the freezer compartment 3, and the path 6R is provided with a cold air discharge port 6b for the refrigerator compartment 4. In the prior art, a cooling air flow restriction mechanism such as a shutter is provided in the path 6R, and the flow rate is manually set by the user. A communication path (not shown) is provided behind the refrigerating chamber 4 to return the cold air inside the refrigerating chamber 4 to the upstream side in the cold air flow direction of the evaporator 7.

  When the blower 8 is driven, air flows through the cold air passage 6. On the upstream side of the blower 8 in the cold air flow direction, the air is cooled while passing through the evaporator 7 and becomes cold air. On the downstream side of the blower 8, the cool air is discharged into the freezer compartment 3 through the discharge port 6a, and is discharged into the refrigerator compartment 4 through the discharge port 6b.

  Note that the passage 6F and the discharge port 6a for discharging the cold air from the blower 8 to the freezer compartment 3 have a smaller flow resistance than the passage 6R and the discharge port 6b for discharging the cold air from the blower 8 to the refrigerator compartment 4. Formed as follows. As shown in FIGS. 1 and 2, the path 6 </ b> F is wide and the path length is short, and the discharge port 6 a that opens to the freezer compartment 3 is large. On the other hand, the path 6R is formed to be thin and the path length is long, and the discharge port 6b that opens to the refrigerator compartment 4 is formed to be smaller than the discharge port 6a. Thereby, the air volume of the cool air discharged to the freezer compartment 3 by the blower 8 becomes larger than the air volume of the cool air discharged to the refrigerator compartment 4.

  A machine room 9 is formed at the lower back of the main body housing 2. A compressor 10 that operates the refrigeration cycle is disposed in the machine room 9. In addition, a condenser (not shown) that radiates heat through the surface of the main body housing 2 and the like is stretched around wall portions such as the left and right side surfaces, the upper surface, and the back surface of the main body housing 2.

  Moreover, the refrigerator 1 is provided with the external temperature detection part 11, the refrigerator compartment temperature detection part 12, and the evaporator temperature detection part 13 as shown in FIG. The outside air temperature detector 11 detects the outside air temperature around the outside of the refrigerator 1. The refrigerator compartment temperature detector 12 detects the storage temperature inside the refrigerator compartment 4. The evaporator temperature detector 13 is disposed in the vicinity of the evaporator 7. The evaporator temperature detection unit 13 detects the temperature of the evaporator 7 in order to control the frost formation of the evaporator 7 and the defrosting operation related to the elimination thereof.

The refrigerator 1 accommodates the control unit 14 shown in FIG. 3 in the main body housing 2 in order to perform the overall operation control. The control unit 14 includes a calculation unit, a storage unit, and the like (not shown), and controls driving of the compressor 10 and the blower 8 based on programs and data stored and input in the storage unit, and the internal temperature is set in advance. The refrigeration cycle is operated to maintain the target temperature. In this operation, the control unit 14 controls related components based on the outside air temperature around the outside of the refrigerator 1 detected by the outside air temperature detecting unit 11 and the refrigerating room temperature detecting unit 12 and the temperature inside the refrigerating room 4, A suitable operation is realized. Furthermore, the control unit 14 controls related components based on temperature information regarding frost formation of the evaporator 7 obtained from the evaporator temperature detection unit 13.

  Then, the detail of the cooling operation of the refrigerator 1 is demonstrated using FIGS. 4 is an explanatory diagram of drive control of the compressor 10 and the blower 8 of the refrigerator 1, FIG. 5 is a graph showing the temperature transition of the refrigerator compartment, and FIG. 6 is a graph for explaining the cooling control corresponding to the outside air temperature of the refrigerator 1. It is.

  In addition, the horizontal axis of FIG. 5 shows time, and a vertical axis | shaft shows the refrigerator compartment temperature Rt of the refrigerator 1. FIG. Moreover, the horizontal axis of FIG. 6 shows the external temperature (° C.) of the refrigerator 1, and the vertical axis shows the temperature (° C.) of the refrigerator 1 (the refrigerator compartment 4 and the freezer compartment 3). FIG. 6 shows the results obtained in the experiment, in which the refrigerator temperature and freezer temperature corresponding to the outside air temperature are shown for each of the three types of rotation speeds (1600 rpm, 3200 rpm, 4200 rpm) of the compressor 10.

  The control unit 14 switches on / off driving (ON / OFF) of the compressor 10 and the blower 8 based on the refrigerator compartment temperature Rt detected by the refrigerator compartment temperature detector 12, and the temperature of the refrigerator compartment 4 is set at a preset target temperature. Control (e.g. 4 ° C) is maintained.

  As shown in FIG. 4, when the refrigerator temperature Rt detected by the refrigerator temperature detector 12 reaches a predetermined first upper limit temperature, the controller 14 drives the compressor 10 and the blower 8 (drive ON) to store the refrigerator. 4 and the freezer compartment 3 are cooled simultaneously. Moreover, the control part 14 will stop the drive of the compressor 10 and the air blower 8 if the refrigerator compartment temperature Rt which the refrigerator compartment temperature detection part 12 detected reaches | attains predetermined 1st minimum temperature (drive OFF). Since the first upper limit temperature is set to a temperature higher than the first lower limit temperature, the refrigerator temperature Rt is controlled to be between the first upper limit temperature and the first lower limit temperature. For example, when the target temperature is 4 ° C., the first upper limit temperature is set to 6 ° C., and the first lower limit temperature is set to 2 ° C.

  Further, the control unit 14 performs the cooling operation in the first cooling mode, the second cooling mode, and the third cooling mode that are switched based on the outside air temperature detected by the outside air temperature detecting unit 11. Each of the first cooling mode, the second cooling mode, and the third cooling mode is controlled so that the freezer compartment temperature can be maintained at a preset target temperature of, for example, −18 ° C. or lower as shown by a thin broken line in FIG. .

  As shown in FIG. 6, the second cooling mode is executed when the outside air temperature is in a predetermined temperature range (for example, 20 ° C. or more and less than 35 ° C.). In the second cooling mode, the rotation speed of the compressor 10 is set to 1600 rpm, for example, and the energy saving operation of the refrigerator 1 can be realized.

  Next, FIG. 7 shows changes in the refrigerator temperature Rt and the freezer temperature Ft in the second cooling mode. In this example of the outside air temperature, when the rotation speed of the compressor 10 is 1600 rpm and the refrigerator compartment temperature Rt is controlled to be between the first upper limit temperature and the first lower limit temperature, the drive ON time of the compressor 10 and the blower 8 is set. Is Ton2, and the drive OFF time is Toff2. The freezer compartment temperature Ft at this time is approximately the freezer compartment target temperature.

  Next, FIG. 8 shows changes in the refrigerator compartment temperature Rt and the freezer compartment temperature Ft when the outside air temperature is lower than a predetermined first switching temperature (for example, 20 ° C.) (first cooling mode). When the outside air temperature is low, since the difference between the refrigerator temperature Rt and the outside air temperature is small, the driving ON time of the compressor 10 and the blower 8 is shortened (Ton1 <Ton2). Moreover, the temperature rise of the refrigerator compartment 4 when the drive of the compressor 10 and the air blower 8 is turned off becomes moderate (Toff1> Toff2). That is, the drive ON ratio (operation rate) of the compressor 10 and the blower 8 decreases. In this case, if the rotation speed of the compressor 10 is set to 1600 rpm, which is the same as that in the second cooling mode, the time for cooling the freezer compartment 3 may become insufficient and the freezer compartment 3 may not reach the target temperature.

Therefore, in the first cooling mode, the rotation speed of the compressor 10 is set to 4200 rpm, for example, and the cooling capacity for the refrigerator compartment 4 and the freezer compartment 3 is made higher than that in the second cooling mode. Thereby, even if it is short time (Ton1), the freezer compartment 3 can be cooled to target temperature.

  When the cooling capacity is increased by increasing the number of revolutions of the compressor 10, not only the cooling capacity of the freezer compartment 3 but also the cooling capacity of the refrigerator compartment 4 is increased. Therefore, the gradient of the descending line (double line) of the refrigerating room temperature Rt in FIG. 8 also increases and the driving ON time Ton1 of the compressor 10 and the blower 8 is strictly shortened. However, as shown in FIGS. 1 and 2, the path 6R for discharging the cold air to the refrigerating chamber 4 has a larger flow path resistance than the path 6F for discharging the cold air to the freezer compartment 3, so that the increase or decrease in the cooling capacity is refrigerated. The influence on the temperature change of the chamber 4 is smaller than the influence on the temperature change of the freezer room 3. That is, when the cooling capacity is increased, the shortening of the drive ON time Ton1 of the compressor 10 and the blower 8 is slight, and therefore, the increase in the gradient of the descending line of the freezer compartment temperature Ft directly affects the temperature drop of the freezer compartment 3. affect. Therefore, in the first cooling mode in which the outside air temperature is low, by increasing the cooling capacity, the freezer compartment temperature Ft can be set to the target temperature while maintaining the refrigerator compartment temperature Rt.

  The third cooling mode is executed when the outside air temperature is higher than a predetermined second switching temperature (for example, 35 ° C.). In the third cooling mode, the rotational speed of the compressor 10 is set to 4200 rpm, for example, and the cooling capacity for the refrigerator compartment 4 and the freezer compartment 3 is higher than that in the second cooling mode.

  When the outside air temperature is high, the refrigerator compartment temperature Rt rises as shown in FIG. 6. Therefore, the cooling capacity is increased by increasing the number of revolutions of the compressor 10 to keep the refrigerator compartment temperature Rt at the target temperature. . At this time, the ratio of driving ON of the compressor 10 and the blower 8 (operation rate) may be higher than in the second cooling mode, and the cooling capacity is also increased. Thereby, the freezer compartment 3 is cooled with a high cooling capacity for a long time, and the freezer compartment temperature Ft may become below target temperature. However, since the freezer compartment 3 should just be below predetermined | prescribed temperature (for example, -18 degreeC), it can be used without a problem if the temperature falls.

  In this manner, in the refrigerator 1 in which the damper for adjusting the temperature of the refrigerator compartment 4 is not mounted, even if the user does not manually set the amount of cold air flowing through the path 6R by opening and closing the shutter or the like, the refrigerator compartment automatically. 4 and the temperature of the freezer compartment 3 are controlled so as to maintain a preset target temperature (for example, a refrigerator compartment temperature of 4 ° C. and a freezer compartment temperature of −18 ° C. or lower).

  In the conventional technology, for example, in order to avoid that the freezer compartment does not fall to a preset target temperature when the outside air temperature is relatively lowered in winter, the refrigerator is refrigerated from the blower so that the amount of cold air discharged to the refrigerator compartment is reduced. The amount of cold air flowing through the path for discharging cold air into the chamber was manually set. On the other hand, the refrigerator 1 of the said embodiment makes the rotation speed of the compressor 10 larger than the 2nd cooling mode in the 1st cooling mode in case the outside air temperature is lower than the 1st switching temperature. When the compressor 10 is driven at a higher rotation, the refrigerator compartment 4 and the freezer compartment 3 may be rapidly cooled and the operating rate of the compressor 10 may be reduced, but cold air is discharged from the blower 8 to the refrigerator compartment 4. Since the flow path resistance of the path 6R is larger than the flow path resistance of the path 6F that discharges cold air from the blower 8 to the freezer compartment 3, the cooling rate of the refrigerator compartment 4 does not change so much, and the operating rate of the compressor 10 decreases significantly. do not do. On the other hand, since the flow path resistance of the path 6F is small, the improvement of the cooling capacity by driving the compressor 10 at a higher rotation directly lowers the freezer compartment temperature Ft. As a result, the freezer compartment 3 is lowered to a preset target temperature.

Moreover, in the said embodiment, in order to raise the cooling capacity with respect to the refrigerator compartment 4 and the freezer compartment 3 at the time of 1st cooling mode rather than at the time of 2nd cooling mode, the rotation speed of the compressor 10 of 1st cooling mode is set to 2nd cooling mode. However, the rotational speed of the blower 8 in the first cooling mode may be set larger than that in the second cooling mode. Further, for example, in the first cooling mode, the cooling capacity may be increased by lowering the temperature of the evaporator 7 by reducing the throttle amount of the expansion valve (not shown) of the refrigeration cycle than in the second cooling mode.

Second Embodiment
Next, the refrigerator of 2nd Embodiment of this invention is demonstrated using FIG. FIG. 9 is a graph for explaining the cooling control corresponding to the outside air temperature of the refrigerator. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. And

  In FIG. 9, as in FIG. 6, the horizontal axis indicates the outside air temperature (° C.) of the refrigerator 1, and the vertical axis indicates the temperature (° C.) inside the refrigerator 1 (the refrigerator compartment 4 and the freezer compartment 3).

  In the refrigerator 1 of the second embodiment, the outside air temperature detection unit 11 detects the outside air temperature based on the OFF time of the compressor 10. The refrigerator 1 determines that the outside air temperature is lower than the first switching temperature (for example, 20 ° C.) when the off time of the compressor 10 is longer than the first predetermined time (for example, 60 minutes), and the outside temperature is switched to the first when the time is short. It is determined that the temperature is higher than the temperature (for example, 20 ° C.). Further, the refrigerator 1 determines that the outside air temperature is higher than the second switching temperature (for example, 35 ° C.) when the off time of the compressor 10 is shorter than the second predetermined time (for example, 20 minutes). 2 It is determined that the temperature is lower than the switching temperature (for example, 35 ° C.).

  Regarding the relationship between the outside air temperature and the off time of the compressor 10, the off time (min) of the compressor 10 is described in association with the outside air temperature (° C.) of the refrigerator 1 below the horizontal axis in FIG. 9. ing. According to FIG. 9, the refrigerator 1 operates in the first cooling mode when the off time of the compressor 10 is 60 minutes or more, operates in the second cooling mode when it is 20 minutes or more and less than 60 minutes, If it is less than a minute, operate in the third cooling mode.

  Similarly to the first embodiment, the refrigerator 1 of the second embodiment automatically sets the temperatures of the refrigerator compartment 4 and the freezer compartment 3 to preset target temperatures (for example, refrigerator compartment temperature 4 ° C., freezer compartment temperature −18 ° C. or lower). ) Is maintained.

<Third Embodiment>
Next, the refrigerator of 3rd Embodiment of this invention is demonstrated using FIG. FIG. 10 is an explanatory diagram of drive control of the compressor and blower of the refrigerator. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. And

  Here, when control is performed so that the temperature of the freezer compartment 3 is maintained at a preset target temperature without detecting the temperature of the freezer compartment 3, the rotation speed of the compressor 10 is reduced when the outside air temperature is relatively lowered. May have to be raised to the maximum.

  Therefore, the refrigerator 1 of the third embodiment uses the fact that the temperature detected by the evaporator temperature detection unit 13 when the drive of the compressor 10 is off is substantially the same as the temperature of the freezer compartment 3. And drive control of the air blower 8 is performed. Thereby, the control part 14 of the refrigerator 1 of the compressor 10 and the air blower 8 is based on the refrigerator temperature Et detected by the refrigerator temperature detection part 13, and the evaporator temperature Et detected by the evaporator temperature detection part 13. The driving is switched on and off, and the temperature of the refrigerator compartment 4 is controlled so as to maintain a preset target temperature (for example, 4 ° C.).

As shown in FIG. 10, the control unit 14 drives the compressor 10 and the blower 8 (drive ON) when the refrigerator compartment temperature Rt detected by the refrigerator compartment temperature detector 12 reaches a predetermined first upper limit temperature (drive ON). 4 and the freezer compartment 3 are cooled simultaneously. Further, the control unit 14 determines that the evaporator temperature Et detected by the evaporator temperature detector 13 reaches a predetermined evaporator upper limit temperature, and the refrigerator compartment temperature Rt detected by the refrigerator compartment temperature detector 12 is less than the first lower limit temperature. When the temperature is too high, the compressor 10 and the blower 8 are driven (drive ON) to cool the refrigerator compartment 4 and the freezer compartment 3 simultaneously.

  According to this configuration, if the evaporator temperature Et reaches the predetermined evaporator upper limit temperature, the compressor 10 and the blower 8 are driven even if the refrigerator compartment temperature Rt does not reach the first upper limit temperature ( Drive ON) The refrigerator compartment 4 and the freezer compartment 3 can be cooled. Accordingly, even when the operating temperature of the compressor 10 and the blower 8 cannot be secured above a predetermined value because the outside air temperature is low, the compressor 10 and the blower 8 can be driven by detecting the temperature rise of the evaporator temperature Et. . For this reason, it becomes unnecessary to set the cooling capacity corresponding to the state in which the operating rates of the compressor 10 and the blower 8 are less than the predetermined value. Therefore, it is possible to maintain the temperatures of the refrigerator compartment 4 and the freezer compartment 3 at a preset target temperature within a wide range of outside air temperature without increasing the variable range of the cooling capacity.

<Fourth embodiment>
Next, the refrigerator of 4th Embodiment of this invention is demonstrated using FIG. FIG. 11 is an explanatory diagram of drive control of the refrigerator compressor and blower. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. And

  The refrigerator 1 of the fourth embodiment has a second upper limit temperature between the first upper limit temperature and the first lower limit temperature of the refrigerating room temperature Rt in order to realize a more preferable cooling operation as compared with the third embodiment. Is provided to ensure a certain range (minimum differential) of the control temperature range of the refrigerator compartment temperature Rt.

  As shown in FIG. 11, when the refrigerator temperature Rt detected by the refrigerator temperature detector 12 reaches a predetermined first upper limit temperature, the controller 14 drives the compressor 10 and the blower 8 (drive ON) to store the refrigerator. 4 and the freezer compartment 3 are cooled simultaneously. Further, the control unit 14 determines that the evaporator temperature Et detected by the evaporator temperature detector 13 reaches a predetermined evaporator upper limit temperature, and the refrigerator compartment temperature Rt detected by the refrigerator compartment temperature detector 12 is greater than the second upper limit temperature. When the temperature is too high, the compressor 10 and the blower 8 are driven (drive ON) to cool the refrigerator compartment 4 and the freezer compartment 3 simultaneously.

  In the refrigerator 1, the outside air temperature detection unit 11 detects the outside air temperature based on the temperature rise time when the temperature of the refrigerator compartment 4 rises to the second upper limit temperature. The refrigerator 1 determines that the outside air temperature is lower than the first switching temperature (for example, 20 ° C.) when the temperature rise time to the second upper limit temperature of the refrigerator compartment 4 is longer than the third predetermined time (for example, 20 minutes), and is short. Sometimes it is determined that the outside air temperature is higher than the first switching temperature (for example, 20 ° C.). Furthermore, the refrigerator 1 determines that the outside air temperature is higher than the second switching temperature (for example, 35 ° C.) when the temperature rise time to the second upper limit temperature of the refrigerator compartment 4 is shorter than the fourth predetermined time (for example, 10 minutes). When it is long, the outside air temperature is determined to be lower than the second switching temperature (for example, 35 ° C.).

  Regarding the relationship between the outside air temperature and the temperature rise time to the second upper limit temperature of the refrigerator compartment 4, the first temperature of the refrigerator compartment 4 is associated with the outside air temperature (° C.) of the refrigerator 1 below the horizontal axis in FIG. 2 Temperature rise time (min) up to the upper limit temperature is described. According to FIG. 12, the refrigerator 1 is operated in the first cooling mode when the temperature rise time to the second upper limit temperature of the refrigerator compartment 4 is 20 minutes or more, and is second when it is 10 minutes or more and less than 20 minutes. It operates in the cooling mode and operates in the third cooling mode when it is less than 10 minutes.

When the second upper limit temperature of the refrigerator compartment 4 is used when driving the compressor 10 and the blower 8 is started, since the minimum differential is secured between the second upper limit temperature and the first lower limit temperature, the compression is performed. The compressor 1 in a short period in which the refrigerator compartment temperature Rt reaches the first lower limit temperature immediately after the start of the drive of the machine 10 and the blower 8 and the drive of the compressor 10 and the blower 8 is stopped.
0 and the ON / OFF operation (chattering) of the blower 8 can be prevented.

  In FIG. 12, the graph for demonstrating the temperature of the refrigerator compartment 4 and the freezer compartment 3 corresponding to the external temperature of the refrigerator 1 at the time of using 3rd Embodiment and 4th Embodiment is shown. As shown in FIG. 12, in the temperature range where the outside air temperature is lower than about 20 ° C., the freezer temperature corresponding to each of the three rotation speeds of the compressor 10 is the first and second embodiments (solid line in FIG. 12). It can be seen that the temperature decreases with respect to the freezer compartment temperature shown (the freezer compartment temperature indicated by a dotted line in FIG. 12). When the evaporator temperature Et reaches a predetermined evaporator upper limit temperature, the compressor 10 and the blower 8 are driven (driving) even if the refrigerator compartment temperature Rt does not reach the predetermined first upper limit temperature. ON), because the refrigerator compartment 4 and the freezer compartment 3 are cooled at the same time, even if the outside air temperature is low, an extreme decrease in the operation rate can be suppressed.

  Thereby, as shown in FIG. 12, it is possible to set the rotation speed of the compressor 10 at the time of the 1st cooling mode to 3200 rpm, and the compressor 10 is made by low rotation compared with 1st and 2nd embodiment. Can be driven. That is, the refrigerator 1 can be operated efficiently and energy saving can be achieved.

<Fifth Embodiment>
Next, the refrigerator of 5th Embodiment of this invention is demonstrated using FIG. FIG. 13 is a block diagram showing the configuration of the refrigerator. Since the basic configuration of this embodiment is the same as that of the first embodiment described above, the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. And

  The refrigerator 1 of 5th Embodiment is provided with the freezer compartment temperature detection part 15 as shown in FIG. The freezer compartment temperature detection unit 15 detects the storage temperature inside the freezer compartment 3.

  The refrigerator 1 uses the freezer compartment temperature detection unit 15 instead of the evaporator temperature detection unit 13 used in the third and fourth embodiments, and performs drive control of the compressor 10 and the blower 8. Thereby, the control part 14 of the refrigerator 1 is based on the temperature of the refrigerator compartment 4 which the refrigerator compartment temperature detection part 12 detected, and the compressor 10 and air blower based on the temperature of the freezer compartment 3 which the freezer compartment temperature detection part 15 detected. 8 is switched on and off, and the temperature of the refrigerator compartment 4 is controlled to maintain a preset target temperature (for example, 4 ° C.). The controller 14 detects that the temperature of the freezer compartment 3 detected by the freezer compartment temperature detector 15 reaches a predetermined freezer compartment upper limit temperature and the temperature of the refrigerator compartment 4 detected by the refrigerator compartment temperature detector 12 is lower than the first lower limit temperature. When the temperature is high, the compressor 10 and the blower 8 are driven (drive ON) to cool the refrigerator compartment 4 and the freezer compartment 3 simultaneously.

  As described above, the refrigerator 1 is connected to the refrigerator compartment 4 for storing stored items in a refrigerator, the freezing chamber 3 for storing stored items in a frozen state, the compressor 10 for operating a refrigeration cycle, and generating cold air by connecting to the compressor 10. An evaporator 7 that performs cooling, a blower 8 that sends out the cold air generated by the evaporator 7 to the refrigerator compartment 4 and the freezer compartment 3, a refrigerator compartment temperature detector 12 that detects the temperature of the refrigerator compartment 4, and an outside that detects the outside air temperature. An air temperature detector 11, and when the temperature detected by the refrigerator compartment temperature detector 12 reaches a predetermined first upper limit temperature, the compressor 10 and the blower 8 are driven to simultaneously cool the refrigerator compartment 4 and the freezer compartment 3, When the first lower limit temperature is reached, the compressor 10 and the blower 8 are stopped. The refrigerator 1 has the refrigerator compartment 4 and the freezer compartment in the first cooling mode in which the outside air temperature is lower than a predetermined first switching temperature (for example, 20 ° C.) than in the second cooling mode in which the outside air temperature is higher than the first switching temperature. The cooling capacity for 3 is high.

  According to this structure, the refrigerator 1 raises cooling capacity with respect to the time of 2nd cooling mode, for example by controlling the rotation speed of the compressor 10 or the air blower 8 at the time of 1st cooling mode. As a result, the user can automatically adjust the temperature of the refrigerator compartment 4 without manually opening and closing the shutter and the like.

  In the refrigerator 1, the rotational speed (4200 rpm or 3200 rpm) of the compressor 10 in the first cooling mode is larger than the rotational speed (1600 rpm) of the compressor 10 in the second cooling mode. According to this configuration, the cooling capacity can be increased more than in the second cooling mode by controlling the rotational speed of the compressor 10 in the first cooling mode. Therefore, the temperature of the refrigerator compartment 4 can be easily adjusted.

  Moreover, in the refrigerator 1, you may make it the rotation speed of the air blower 8 of a 1st cooling mode become larger than a 2nd cooling mode. According to this configuration, the cooling capacity can be increased more than in the second cooling mode by controlling the rotational speed of the blower 8 during the first cooling mode. Therefore, the temperature of the refrigerator compartment 4 can be easily adjusted.

  In the refrigerator 1, the outside air temperature detection unit 11 detects the outside air temperature based on the off time of the compressor 10, and the outside air temperature is first when the off time of the compressor 10 is longer than a first predetermined time (for example, 60 minutes). When it is determined that the temperature is lower than one switching temperature (for example, 20 ° C.) and is short, the outside air temperature is determined to be higher than the first switching temperature (for example, 20 ° C.). According to this configuration, the outside air temperature can be estimated without using a sensor or the like that directly detects the outside air temperature as the outside air temperature detecting unit 11. Therefore, it is not necessary to provide a sensor for directly detecting the outside air temperature, and it is possible to reduce the number of parts and the manufacturing process.

  Further, the refrigerator 1 has a channel resistance higher than the path 6R and the discharge port 6b of the cool passage 6 through which the cool passage 6F and the discharge port 6a of the cool passage 6 discharge cool air from the blower 8 to the freezer compartment 3. Is small. In the refrigerator 1, the amount of cold air discharged into the freezer compartment 3 by the blower 8 is larger than the amount of cold air discharged into the refrigerator compartment 4. According to these structures, it becomes easier to cool the freezer compartment 3 than the refrigerator compartment 4. That is, the temperature in the freezer compartment 3 is more likely to be lower than that in the refrigerator compartment 4. Therefore, it is possible to easily manage the temperature of the refrigerator compartment 4 and the temperature of the freezer compartment 3 at respective preset target temperatures without using a damper or a shutter.

  The refrigerator 1 also includes an evaporator temperature detector 13 for detecting the temperature of the evaporator 7 and controlling the defrosting operation of the evaporator 7. The refrigerator 1 is configured such that the temperature detected by the evaporator temperature detector 13 reaches a predetermined evaporator upper limit temperature and the temperature detected by the refrigerator temperature detector 12 is higher than the first lower limit temperature or the first upper limit temperature. When the temperature is higher than the second upper limit temperature between the first lower limit temperature and the first lower limit temperature, the compressor 10 and the blower 8 are driven. According to this configuration, the temperature of the freezer compartment 3 can be estimated from the detected temperature of the evaporator temperature detector 12. Therefore, it is possible to adjust the temperature of the refrigerator compartment 4 and the freezer compartment 3 with suitable accuracy.

  The refrigerator 1 also includes a freezer compartment temperature detection unit 15 that detects the temperature of the freezer compartment 3. The refrigerator 1 includes the compressor 10 and the blower when the temperature detected by the freezer temperature detector 15 reaches a predetermined freezer upper limit temperature and the temperature detected by the refrigerator temperature detector 12 is higher than the first lower limit temperature. 8 is driven. According to this configuration, the temperature of the freezer compartment 3 can be directly detected by the freezer compartment temperature detector 15. Therefore, it is possible to adjust the temperature of the refrigerator compartment 4 and the freezer compartment 3 with a more suitable accuracy.

  And according to the structure of the said embodiment of this invention, in the refrigerator 1 which does not mount the damper for temperature control of the refrigerator compartment 4, a user does not need to open and close a shutter etc. manually, and a refrigerator with favorable usability 1 can be provided.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  The present invention can be used in refrigerators.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Main body housing | casing 3 Freezer room 4 Refrigeration room 6 Cold air passage 6F, 6R Path | route 7 Evaporator 8 Blower 10 Compressor 11 Outside temperature detection part 12 Refrigeration room temperature detection part 13 Evaporator temperature detection part 14 Control part 15 Freezer room Temperature detector

Claims (5)

Refrigerated room for storing stored refrigerated, a freezing room for storing stored frozen, a compressor for operating a refrigeration cycle, an evaporator connected to the compressor to generate cold air, and generated by the evaporator A blower for sending cold air to the refrigerating room and the freezing room, a refrigerating room temperature detecting part for detecting the temperature of the refrigerating room, and an outside air temperature detecting part for detecting the outside air temperature, the refrigerating room temperature detecting part When the detected temperature reaches a predetermined first upper limit temperature, the compressor and the blower are driven to simultaneously cool the refrigerator compartment and the freezer compartment. When the detected temperature reaches a predetermined first lower limit temperature, the compressor and the blower are turned on. In the refrigerator that stops,
In the first cooling mode when the outside air temperature is lower than the predetermined switching temperature, the cooling capacity for the refrigerator compartment and the freezer compartment is higher than that in the second cooling mode when the outside air temperature is higher than the switching temperature. A refrigerator characterized by high price.   The refrigerator according to claim 1, wherein the rotation speed of the compressor in the first cooling mode is larger than that in the second cooling mode.   The outside air temperature detector detects the outside air temperature based on the off time of the compressor, and when the off time is longer than a predetermined time, the outside air temperature is determined to be lower than the switching temperature, and the outside air temperature is short when the outside air temperature is short. The refrigerator according to claim 1 or 2, wherein it is determined that the temperature is higher than the switching temperature.   The flow path resistance of the path | route which discharges cold air from the said air blower to the said freezer compartment is smaller than the flow path resistance of the path | route which discharges cold air to the said refrigerating room. Refrigerator. An evaporator temperature detector for detecting the temperature of the evaporator and controlling the defrosting operation of the evaporator; the detected temperature of the evaporator temperature detector reaches a predetermined evaporator upper limit temperature; and When the temperature detected by the refrigerator temperature detection unit is higher than the first lower limit temperature or when the temperature is higher than the second upper limit temperature between the first upper limit temperature and the first lower limit temperature, the compressor and the blower are The refrigerator according to any one of claims 1 to 4, wherein the refrigerator is driven.

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