JP4625740B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with an automatic ice making device.

  Patent Document 1 describes a conventional example of a refrigerator equipped with an automatic ice making device. In this example, a temperature sensor for detecting the temperature of the ice tray is provided, and when the completion of ice making is determined based on the temperature detected by the temperature sensor, the ice removing operation is controlled.

  Patent Document 2 discloses a refrigerator in which an ice tray can be attached and detached. If the ice tray is configured to be detachable, the position of the temperature sensor becomes a problem. In this example, the temperature sensor is arranged in a hollow pipe connected to the drive shaft.

  Patent Document 3 shows an example in which the ice tray is returned to the origin position when the motor is locked, and failure of the automatic ice making apparatus is prevented by returning the ice tray to the origin position.

JP-A-6-317371 JP-A-6-323702 Japanese Unexamined Patent Publication No. 7-305927

  In Patent Document 1, ice making is controlled based on the temperature detected by the temperature sensor attached to the ice tray. However, if the ice tray is removed, both the temperature sensor and the temperature sensor are taken out. It becomes difficult to handle the wiring that connects the two. In addition, the ice tray with the temperature sensor attached was difficult to clean.

  In Patent Document 2, since the temperature sensor is attached to the drive shaft side, only the ice tray can be attached / detached. However, when actually attaching / detaching the ice tray to / from the shaft, the hollow pipe containing the temperature sensor is connected to the bearing of the ice tray. It was necessary to engage through the part. In particular, since the engagement work is on the back side of the freezer compartment, the work is difficult.

  Further, as described above, when the temperature sensor is attached to the ice tray or a member adjacent to the ice tray, it is relatively easy to manage the ice making time. In Patent Document 1, an ice making completion determination temperature and an ice making completion determination assisting temperature are provided, and the completion of ice making is determined by comparing these temperatures with the temperature of the ice making tray. It is assumed that a temperature sensor is attached to an adjacent member. The reason will be described below.

  When the water is supplied to the ice tray, the temperature of the water is 0 ° C. or higher, and the temperature gradually decreases when cooled in the ice making chamber. When the temperature of the water drops to 0 ° C., the state changes from water to ice, and the water freezes while maintaining 0 ° C. If all the water in the ice tray is frozen, the temperature of the ice tray will decrease again, so it is considered that ice making has already been completed at this point. It is necessary that ice making is completed. Therefore, the ice making completion determination temperature and the accumulated time are managed, and the ice removing operation is performed when the ice making completion condition is satisfied.

  As described above, when the temperature sensor is attached to the ice tray, the completion of ice making can be easily recognized by the set temperature (for example, ice making completion determination temperature as in Patent Document 1) in consideration of the freezing point temperature and the safety factor. .

  However, in the configuration of a detachable ice tray, the above control is difficult. That is, since the temperature sensor cannot be directly attached to the ice tray, it is necessary to detect the completion of ice making even indirectly. Therefore, although it is considered that reliable ice making and de-icing can be performed by setting the safety factor high, there has been a problem that ice making time becomes long and ice making efficiency is lowered.

  In addition, if the ice tray is detachable, it may occur that water is supplied with the ice tray removed. At this time, the supplied water falls into the ice storage container instead of the ice tray, but the above-mentioned patent documents do not consider the control in a state where the ice tray is removed.

  Moreover, even if an ice tray is attached, a user may put water into the ice tray and attach it. For example, when a user of a refrigerator observes a situation in the middle of ice making and visually estimates the time until ice making is completed, water is still in place when the ice tray is installed again. However, when a new water supply operation is performed in such a situation, double water supply is performed, and water overflowing from the ice tray is spilled into the ice storage container below. The control after the ice tray is attached is not considered in the above-mentioned patent document.

  In addition, when water is not evenly supplied to each ice making block, or when double water is supplied, so-called plate ice may be formed in which ice in each ice making block is connected and frozen. At this time, the twisting torque of the ice tray increases at the time of deicing, which may become abnormal due to motor lock. If the ice tray is stopped in a tilted state, when the ice tray is pulled out, it interferes with other parts in the cabinet and cannot be removed.

  In Patent Document 3, the ice tray is returned to the original position when the motor is locked, but this example prevents further failure caused by the motor lock and eliminates the abnormality that causes the motor lock. It wasn't.

  The present invention has been made in view of the above problems, and an object thereof is to provide a refrigerator provided with an automatic ice making device having a detachable ice making tray and improving the usability of the user or improving the ice making efficiency. It is said.

In order to achieve the above object, the refrigerator of the present invention includes a blower that blows cool air to an ice making chamber, an automatic ice making device disposed in the ice making chamber, and an automatic discharge device that is discharged from the back of the ice making chamber by the blower. An ice-making chamber temperature sensor attached to a place away from the path of the cold air flowing to the ice-making tray in the ice-making device, and a control device that determines that ice making is complete and controls the automatic ice-making device to perform the ice removing operation. And the ice making count is started after the temperature detected by the ice making chamber temperature sensor is equal to or lower than a predetermined temperature, the ice making count has completed a predetermined count-up, and the accumulated operation time of the blower is predetermined from the start of the ice making count. When it is time, it is judged that ice making is completed, and the ice removing operation is performed.

  In the refrigerator having the above-described configuration, the control device continues the ice making count when the temperature detected by the ice-making chamber temperature sensor is lower than the first set temperature, and is higher than the first set temperature. Then, the ice making count is temporarily stopped, and the ice making time is managed by resetting the ice making count when it becomes higher than the second set temperature set higher than the first set temperature.

  Further, when the detected temperature of the ice making chamber temperature sensor becomes higher than the first set temperature and the ice making count is temporarily stopped, the first temperature is detected even if the detected temperature becomes lower than the first set temperature. When the temperature is higher than the third set temperature set lower than the set temperature, the ice making count is temporarily stopped.

  In addition, when the output temperature of the ice making chamber temperature sensor is lower than the third set temperature set lower than the first set temperature, the control device continues the ice making when the preset temperature continues for a preset time. The count was accelerated.

  The freezing room including the ice making room is closed with a door, and includes a door sensor for detecting the open / closed state of the door, and the completion of ice making is determined based on the output from the door sensor.

  In addition, the value of the set temperature is different depending on the time from the start of ice making. For example, the upper limit temperature at which the ice making counter is counted is raised in the second half of the ice making time, and the conditions are changed depending on the state of ice in the ice making tray.

  In any one of the refrigerators, the ice making chamber temperature sensor is attached to a frame forming an outer shell of the automatic ice making device.

  ADVANTAGE OF THE INVENTION According to this invention, the automatic ice making apparatus which has a detachable ice-making tray can be provided, and the refrigerator which aimed at the improvement of the usability of a user or the improvement of ice making efficiency can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a refrigerator according to the present embodiment, FIG. 1A is a perspective view showing an overall appearance, and FIG. 1B is an enlarged perspective view showing the periphery of an ice making chamber. FIG. 2 is a longitudinal sectional view showing a main part of the present embodiment.

  The refrigerator main body 1 has a refrigerator compartment 2, an upper freezer compartment 3, a lower freezer compartment 4, and a vegetable compartment 5 from above. The refrigerator compartment 2 is closed by a rotary refrigerator compartment door 6, and the other chambers are closed by drawer doors 7-10. The upper freezer compartment 3 is provided with two storage compartments divided into left and right, one of which is an ice making compartment. In this embodiment, the ice making chamber 3a and the quick freezing chamber 3b are divided into left and right. An ice storage container 13 is provided in the ice making chamber 3a with the drawer type ice making door 7 and a quick freezing container 14 with the drawer type quick freezing room door 8 is provided in the quick freezing room 3b. ing.

  Similarly, in the lower freezer compartment 4 and the vegetable compartment 5, a freezer compartment container 15 and a vegetable compartment container 16 that are pulled out together with the drawer-type freezer compartment door 9 and the vegetable compartment door 10 are provided in the respective storage compartments.

  The refrigerator compartment 2 includes a water storage tank 11 in which water supplied to the ice making room 3a is stored. In the ice making chamber 3a, an automatic ice making device 12 having an ice making tray 23 is disposed. Then, water in the water storage tank 11 is supplied to the ice tray 23 through the water supply pipe 21. In the present embodiment, the refrigerating chamber 2 and the ice making chamber 3 a are provided adjacent to each other through a heat insulating partition wall 24. Therefore, the water supply pipe 21 has a structure that penetrates the heat insulating partition wall 24 and connects the water storage tank 11 and the automatic ice making device 12. More specifically, the water storage tank 11 is placed on the heat insulating partition wall 24, and the automatic ice making device 12 is attached to the lower surface of the heat insulating partition wall 24 (that is, the ceiling surface of the ice making chamber 3a).

  Now, when water is supplied, the water supply pump 22 is driven, and the drive time is controlled so that the ice tray 23 is supplied with a predetermined amount of water. The amount of water supplied is, for example, 80 to 100 cc, and may be controllable depending on the size of ice to be made. At this time, the driving time of the water supply pump 22 is, for example, about 5 to 10 seconds. In addition, an ice storage container 13 is located below the ice tray 23 in the automatic ice making device 12 so that the ice made by the automatic ice making device 12 can be stored.

  A cooler 18 constituting a part of the refrigeration cycle is disposed in the cooler chamber of the freezer room composed of the upper freezer room 3 and the lower freezer room 4. Further, a blower 19 is provided above the cooler, and a defrosting heater 20 is provided below. The cold air generated by the cooler 18 is blown by the blower 19 and is sent through the cold air passage 17 to each chamber including the ice making chamber 3a. The freezer compartment is cooled by the cooler 18 and the blower 19 and is in a freezing temperature zone of −18 ° C. or lower, and the water in the ice tray 23 placed in the ice making chamber 3a is frozen at this low temperature. If frost adheres to the cooler 18, the defrosting heater 20 generates heat and defrosting is performed. During this defrost mode, the refrigeration cycle and the blower 19 are controlled to stop.

  The automatic ice making device 12 receives a series of instructions “water supply → ice making → ice removal” from the control device, and performs the ice making operation controlled so that the ice tray 23 is rotated forward and reverse. The ice is removed from the ice and stored in the ice storage container 13.

  Next, the configuration of the automatic ice making device 12 will be described with reference to FIG. FIG. 3 is a cross-sectional view showing the configuration of the automatic ice making device. FIG. 3A is a transverse sectional view showing the positional relationship with the ice storage container 13, and FIG. 3B is a sectional view taken along the line CC in FIG.

  An ice tray 23 is arranged in a frame 27 constituting the outer shell of the automatic ice making device 12. In addition, an ice storage container 13 is disposed below the ice tray 23, and drops into the ice storage container 13 when the ice is removed. These are all disposed in the ice making chamber 3a.

  The amount of ice stored in the ice storage container 13 is detected by an ice detecting lever 30 provided in the automatic ice making device 12. The amount of ice is grasped by the height at which the ice detection lever 30 contacts the ice in the ice storage container 13. If the ice is removed in a state where the ice is sufficiently stored, the ice in the ice storage container 13 becomes too much. Therefore, when the amount of ice is large, it is controlled not to perform the ice removal.

  A drive motor 26 is provided on the rear side of the ice tray 23, and the drive motor 26 plays a role of rotating the ice tray 23 during ice removal. Since the front side of the ice tray 23 is provided with a regulating member that does not rotate more than a certain rotation angle, when the rear side of the ice tray 23 is driven by the drive motor 26, the ice tray 23 is twisted and deicing is performed. .

  The output shaft 26 a protruding from the drive motor 26 toward the ice tray 23 is engaged with a bearing shaft 23 b protruding rearward from the ice tray 23. This engagement is made when the ice tray 23 is pushed backward. Therefore, it is necessary to guide the bearing shaft 23b on the rear side of the ice tray 23 so as to engage with the output shaft 26a.

  Therefore, a mounting plate 28 on which the output shaft 26a is mounted is provided. The mounting plate 28 is suspended from a rail 31 extending in the front-rear direction in the frame 27. In the present embodiment, hooking grooves 28 b are provided on both sides of the mounting plate 28 so as to be suspended from the rail 31. When the bearing shaft 23b is placed in the U-shaped groove 28a of the placement plate 28, the heights of the bearing shaft 23b and the output shaft 26a substantially coincide. Since the mounting plate 28 is suspended on the rail 31 so as to be movable back and forth, when the bearing shaft 23b is pushed into the back side while being mounted on the mounting plate 28, the both engage. Therefore, the mounting operation on the back side of the ice tray 23 becomes easy, and the user can easily attach and detach the ice tray 23.

  When the ice tray 23 is engaged with the output shaft 26a of the drive motor 26, an ice making operation is possible. However, it must be detected that the ice tray 23 has been normally installed in the automatic ice making device 12. In the present embodiment, an ice tray detection sensor 33 is provided to detect that the ice tray 23 is installed. Thus, when the mounting plate 28 is pushed to a position where the bearing shaft 23b and the output shaft 26a are engaged, it is determined that the mounting plate 28 is detected by the ice making detection sensor 33, and the presence or absence of the ice making tray 23 is determined. is doing.

  In addition, the latching | locking part 23c provided in the bearing shaft 23b becomes a concave shape inserted in the U-shaped groove 28a. Therefore, even if the ice tray 23 moves back and forth, the mounting plate 28 suspended from the frame 27 is configured not to be detached from the locking portion 23c.

  A shaft 23 a on the near side of the ice tray 23 is rotatably supported by a bearing 25. The shaft 23 a has a structure having a flange shape portion, and this flange shape portion is inserted into a groove 25 d provided in the bearing 25. Therefore, when the bearing 25 is pulled out in the arrow Q, the ice tray 23 is pulled out together.

  The bearing 25 includes a base portion 25a and a lid portion 25b. When the lid portion 25b is opened in the direction of arrow P around the fulcrum 25c, the upper portion of the shaft 23a is opened. When the bearing 25 is pulled out in the direction of the arrow Q, the engagement between the bearing shaft 23b behind the ice tray 23 and the output shaft 26a is disengaged, and the ice tray 23 is pulled forward, and the ice tray 23 is opened by opening the lid portion 25b. Can be removed.

  As described above, if the ice tray 23 is detachable, the temperature sensor cannot be attached to the ice tray 23. Therefore, in this embodiment, the temperature sensor 40 is provided on the side of the frame 27. The temperature sensor 40 needs to be installed at least in the ice making chamber 3a, and needs to detect the temperature in the ice making chamber 3a.

  As shown in FIG. 2, the cool air sent from the cooler 18 by the blower 19 flows from the rear to the front with respect to the ice tray 23. Therefore, a cold air outlet (not shown) is provided on the rear side of the ice tray 23. The cold air discharged from the cold air discharge port flows to lick the upper surface of the ice tray 23 to make ice.

  In such a configuration, when cold air is directly blown onto the temperature sensor 40, the temperature of the discharged cold air is measured together with the temperature in the ice making chamber 3a. At this time, since the management of the ice making completion time by temperature becomes extremely difficult, in this embodiment, the temperature sensor 40 is attached at a position where the cold air does not directly hit.

  Specifically, as shown in FIG. 3, the positions in the left and right width directions are positions away from the opening of the cold air outlet and the width portion of the ice tray 23, and the positions in the depth direction before and after are ice trays 23. The position in the depth direction from the center in the depth direction and the position in the height direction is a position that falls within the side projection plane of the automatic ice making device 12. By installing the temperature sensor 40 at this position, it is possible to manage the ice making time while suppressing the influence of the temperature change caused by the discharged cold air.

  The temperature sensor 40 of the present embodiment is attached to the side wall of the frame 27 as a position that satisfies the left and right width direction positions, the front and rear depth direction positions, and the height direction position.

  Next, attachment / detachment of the ice tray 23 from the automatic ice making device 12 will be described with reference to FIG. FIG. 4 is a diagram showing the configuration of the automatic ice making device at the time of attachment / detachment. FIG. 4 (a) shows a state in which the ice tray 23 is pulled out, and FIG. 4 (b) shows a state in which the ice tray is removed.

  When the ice tray 23 is pulled out in the direction of arrow Q by the handle provided on the bearing 25, the mounting plate 28 stored in the locking portion 23c is also pulled out, and the ice tray detection sensor 33 has removed the ice tray. Is detected. Then, as shown in FIG. 4A, when the ice tray 23 is almost pulled out from the frame 27, the cover 25b of the bearing 25 is opened as described above, and the upper portion of the shaft 23a is opened. At this time, the shaft portion on the rear side of the ice tray 23 is placed in the U-shaped groove 28 b of the placement plate 28. Since the U-shaped groove 28b is also opened upward, the ice tray 23 can be easily taken out by lifting the shaft 23a (FIG. 4B).

  On the other hand, when attaching the ice tray 23, it is only necessary to perform the reverse operation, and the locking portion 23c is inserted into the U-shaped groove 28b, and the shaft 23a on the near side as shown by the arrow R in FIG. May be installed in the bearing 25. Thereafter, if the ice tray 23 is pushed in the direction of the opposite arrow Q in FIG. 4A, the bearing shaft 23b and the output shaft 26a are engaged, and the ice tray detection sensor 33 recognizes the attachment of the ice tray 23, Normal ice making becomes possible.

  Control of the refrigerator provided with the automatic ice making device 12 in which the ice tray 23 can be attached and detached as described above will be described with reference to FIGS.

  FIG. 5 is a block diagram showing a part of the control configuration of this embodiment. As described above, the ice making tray detection sensor 33 and the temperature sensor 40 of the ice making chamber 3a (hereinafter referred to as the IM chamber temperature sensor 40) are attached in the ice making chamber 3a. These sensors are connected to a control device 37, and the control device 37 controls each part based on the presence / absence of an ice tray or the temperature information of the ice making chamber.

  Further, an IM mode switching SW 38, an IM door sensor 39, a freezer door sensor 41, a buzzer 42, an IM mode display LED 43, a water supply pump 22, an automatic ice making device 12, and an ice tray drawer monitoring timer 44 are connected to the control device 37. ing.

  The operation of each part will be described. As described above, the ice tray detection sensor 33 is a sensor that detects whether or not the ice tray 23 is normally connected to the drive motor 26. In the present embodiment, the switch is turned on / off by the mounting plate 28. The presence or absence of an ice tray is detected.

  The IM chamber temperature sensor 40 is a sensor attached to the outer wall of the frame 27 as a position where the discharged cold air does not directly hit, and detects the temperature in the ice making chamber 3a. As will be described in detail later, the IM chamber temperature sensor 40 is used to determine whether or not the condition of deicing is satisfied when attempting to deicer the ice in the ice tray 23.

  The IM mode switching SW 38 is a switch that can stop the operation of the automatic ice making device 12. When the IM mode switching SW 38 is off, a series of ice making operations are not performed at all. For example, when the refrigerator user does not use ice, such as in winter, automatic ice making is stopped by turning this switch off. In other words, all of the following description shows control when the IM mode switching SW 38 is on.

  The IM door sensor 39 is a switch that detects opening and closing of the ice making room door 7. When the ice making room door 7 is opened, the water supply operation and the ice removing operation to the automatic ice making device 12 are temporarily stopped. The This is because if the ice making chamber door 7 is opened, the ice storage container 13 is pulled out, so that it cannot be deiced.

  The freezer compartment door sensor 41 is a switch that detects opening and closing of the freezer compartment door 9 that closes the lower freezer compartment 4. When the freezer compartment door 9 is open, the operation of the blower 19 that sends cold air to the freezer compartments 3, 4, etc. is stopped. If the blower 19 is operating when the freezer compartment door 9 is open, the escape of cold air is increased, and this is avoided.

  The buzzer 42 notifies the sound until the normal operation is resumed when the ice tray 23 is installed in the automatic ice making device 12, and the IM mode display LED 43 is lit while the buzzer 42 is sounding. And a display device for visually informing the user. Either the buzzer 42 or the IM mode LED 43 has no problem. In any case, the buzzer 42 and the IM mode LED 43 may be informing means for notifying the time until the ice tray 23 returns to normal operation.

  The water supply pump 12 supplies the water in the water storage tank 11 to the ice tray 23 as described above. Water supply timing and water supply time are controlled by the control device 37. The water supply amount may be variable or constant.

  The drive motor 26 is mentioned as what is connected with the control apparatus 37 in the automatic ice making apparatus 12. The drive motor 26 is in charge of deicing in a series of ice making flows. When the controller 37 controls the drive motor 26 to drop the ice in the ice tray 23 into the ice storage container 13, the controller 37 reverses the drive motor 26 to return the ice tray 23 to its original position. When the ice tray 23 returns to the original position, the water supply pump 12 is controlled to supply water and ice is made again.

  Normally, the condition for driving the drive motor 26 is a case where the condition of deicing is satisfied, and this condition is determined by the control device 37 based on information from the IM room temperature sensor 40. In this case, it goes without saying that the ice tray 23 is attached to the automatic ice making device 12 and that the IM mode switching SW 38 is turned on.

  The ice tray drawer monitoring timer 44 measures the time during which the ice tray 23 is removed. The ice tray drawer monitoring timer 44 manages the time from when the ice tray 23 is removed from the drive motor 26 to when it is mounted again.

  The purpose of providing the ice tray drawer monitoring timer 44 is as follows. That is, the first is to prevent double water supply to the ice tray 23, and the second is to prevent the ice making time from being delayed.

  As shown in FIG. 4, the user can attach and detach the ice tray 23, but there are various reasons for removing the ice tray. For example, to clean the ice tray, to estimate the time to complete ice making, to visually check the status of the ice making process, or to check the condition of the ice making process, or to consider it as a mounting failure at the time of installation and pull it out again for confirmation. It can be the case or various other reasons. Moreover, even if it is a case where it takes out in order to wash the ice tray 23, it may attach in the state which put water into the ice tray 23 after washing | cleaning.

  In the present embodiment, in consideration of the above circumstances, the following control is performed when the ice tray 23 is attached and detached. First, from the time when the ice tray 23 is attached to the time of returning to normal operation, the ice making preparation operation time is set, and the buzzer 42 and the IM mode display LED 43 are controlled to inform the user that the ice making preparation operation is in progress. It was decided. Therefore, when the ice tray 23 is normally attached, it can be known by the buzzer 42 and the IM mode display LED 43. At this time, the user does not consider the mounting failure and does not pull out again for confirmation.

  In addition, when the ice tray 23 is mounted with water, so-called double water supply may be performed. That is, the control device 37 is a case where the water supply pump 12 is driven to supply water further to the ice tray 23. If the amount of water supply is large, the partition between the ice making blocks of the ice tray 23 is exceeded, so that it becomes plate ice. It is difficult to remove ice from plate ice even if the ice tray 23 is rotated by the drive motor 26. Therefore, a motor lock may occur during the deicing operation, resulting in a failure. Therefore, in the present embodiment, during the ice making preparation operation, while the buzzer 42 and the IM mode display LED 43 are displaying, the ice tray 23 is always reversed and the ice tray 23 is emptied. As a result, failure due to motor lock can be avoided.

  However, if the ice making tray 23 is pulled out in order to visually check the state of ice making, and the ice making preparation operation is performed until it is returned immediately after the confirmation, water or ice in the middle of ice making falls. Therefore, an ice tray drawer monitoring timer 44 is provided to avoid this. Specifically, based on the time information from the ice tray drawer monitoring timer 44, the control device 37 determines whether or not to perform an ice making preparation operation. That is, when the ice tray 23 is returned within, for example, 5 seconds, it is considered that the ice tray 23 has only been visually observed. Therefore, it is determined that the ice tray 23 is not removed. On the other hand, in the case of 5 seconds or more, an ice making preparation operation is performed when the ice making plate 23 is attached on the assumption that the ice making plate 23 has been removed for other reasons (cleaning or the like).

  As a result, when the user pulls out the ice tray 23 for checking the ice in the ice tray 23 and returns it immediately thereafter, the ice tray 23 is not inverted, so the above inconvenience can be avoided, It is possible to prevent the ice making time from being delayed without resetting the ice making time described later.

  That is, when the user takes out the ice tray 23 from the automatic ice making device 12 or pulls it out from the frame 27, the ice tray detection sensor 33 detects that there is no ice tray. If this state continues for a certain time (for example, 5 seconds), it is recognized that the ice tray 23 has been taken out, and when it is returned in a short time (the degree of confirmation of the ice making state), processing is performed so that it is not recognized as being taken out. The handleability of the drawer operation is eased and the ice making time is not unnecessarily delayed.

  In addition, when the ice tray 23 is mounted after washing, it is assumed that the ice tray 23 is returned to its original state with water remaining. This causes a torque shortage of the drive motor 26, and the drive motor 26 causes a motor lock in the process of the ice removal operation. Conventionally, a service person has to be repaired at this time, but in the case of the present embodiment, the user can easily pull out the ice tray 23.

  Hereinafter, control for pulling out the ice tray 23 when the motor is locked will be described. In FIG. 5, reference numeral 45 denotes a position securing signal, which indicates a signal that is issued from the control device 37 when an abnormality occurs in the drive motor 26. When the position securing signal 45 is issued from the control device 37 when the motor is locked, the drive motor 26 rotates the ice tray 23 in the reverse direction (original position side) to return the ice tray 23 to the horizontal position, and then the ice tray. 23 is stopped. That is, the position securing signal 45 has a function of “abnormally stopping” the ice tray 23.

  The reason why the ice tray 23 is controlled to return to the horizontal position as an abnormal stop is to allow the user to remove the ice tray 23. If the ice tray 23 is left at the motor lock position, the ice tray 23 is inclined and cannot be pulled out. Even if the inclination angle is small and can be pulled out, when the ice tray 23 is attached again, it must be attached by being inclined by the angle when it is taken out. Since the output shaft 26a does not move from the back side of the ice making chamber 3a, the ice tray 23 cannot be returned.

  According to the present embodiment, even when the motor is locked by the connected ice, the ice tray can be removed and reattached. The cause can be eliminated.

  When the position securing signal 45 is issued, a sound or display different from that during the ice making preparation operation is performed on the buzzer 42 or the IM mode display LED 43. Thus, the user can know that there was an abnormality by notifying the contents different from usual.

  Next, the control of ice making in this embodiment will be described with reference to FIGS. FIG. 6 is a block diagram showing a control configuration relating to ice making control of the present embodiment.

  In the present embodiment, the control device 37 controls the automatic ice making device 12 in response to inputs from the IM room temperature sensor 40, the ice making monitoring counter 46, the IM door sensor 39, the freezer compartment door sensor 41, and the blower ON integrated time counter 47. I do. However, these do not necessarily need to be clearly distinguished, and for example, a control device 37 ′ including the ice making device counter 46 and the blower ON integrated time counter 47 in the function of the control device may be used (illustrated by a broken line). In the following description, it is assumed that the control device 37 'performs counting.

  In performing control with these configurations, first, the operation of each unit will be described. When the ice making monitoring counter 46 is counted up and reaches a predetermined count, the control device 37 assumes that ice making has been completed, and the automatic ice making device 12 performs the ice removing operation. That is, the count of the ice making monitoring counter 46 corresponds to the ice making time.

  The ice making monitoring counter 46 performs an ice making counter start 46a, an ice making counter temporary stop 46b, an ice making counter reset 46c, and an ice making counter N-times acceleration 46d when conditions described later are satisfied.

  As described above, the IM door sensor 39 and the freezer compartment door sensor 41 detect opening and closing of the doors of the respective storage compartments. Detection information from these sensors is also used in ice making control. When the ice making room door 7 or the freezing room door 9 is opened, information that the door is opened is transmitted from the IM door sensor 39 or the freezing room door sensor 41 to the control device 37. When the door is open for a long time (for example, 10 minutes), the control device 37 resets the ice making monitoring counter 46.

  The IM chamber temperature sensor 40 detects the temperature in the ice making chamber 3a. The ice making monitoring counter 46 is incremented by the temperature detected by the IM room temperature sensor 40, or is stopped or reset.

  The blower ON integrated time counter 47 is counted up while the blower 19 is operating. While the blower 19 is in operation, the refrigeration cycle is usually in operation and cold air is circulated. Therefore, it is considered that ice making is in progress while the blower 19 is operating, and in this embodiment, the control device 37 controls ice making while monitoring the operating state of the blower 19.

  In particular, the most effective way to shorten the ice making time is to flow cold air on the surface of the ice tray. The time can be shortened by 1.5 times or more compared with the case where the device is simply placed in a low temperature environment without flowing cold air. In this system, in consideration of this situation, the operation time of the blower 19 is counted by the blower ON integrated time counter 47.

  As described above, when the IM chamber temperature sensor 40 satisfies the condition of a predetermined temperature (for example, −15 ° C. or lower), the ice making monitoring counter 46 starts the ice making count (46a). When the count-up is completed (for example, 60 to 90 minutes), it is determined that the ice making is completed, and the control device 37 controls the automatic ice making device 12 to perform the ice removing operation. It should be noted that the accumulated time of the blower ON accumulated time counter 47 also needs to satisfy the conditions for completion of ice making. For example, if the blower 19 is operating for 50 to 70 minutes, the deicing operation is performed. If not, even if the ice-making monitoring counter 46 has completed counting up, the ice is not removed.

  When the ice removal is completed, the control device 37 drives the water supply pump 22 again to prepare for ice making again.

  Note that the ice making monitoring counter 46 is in a case where the defrost heater 20 is energized to enter the defrost mode, a large amount of cooling load is put into the cabinet, or a case where the door is opened for a long time. As described above, when the temperature of the ice making chamber 3a rises and the condition of the ice making counter temporary stop 46b is satisfied, the count is temporarily stopped.

  When the temperature further rises and the temperature in the ice making chamber 3a becomes high enough to satisfy the condition of the ice making counter reset 46c, the ice making monitoring counter is reset.

  The ice making monitoring counter 46 also has a function of accelerating the ice making count. When the temperature in the ice making chamber 3a is lowered to such an extent that there is no problem even if the count-up is accelerated, the condition of the ice making counter N-fold acceleration 46d is satisfied and the ice making time is shortened.

  Refrigerators in recent years have improved refrigeration capacity, and some have a quick freezing function or a quick ice making function. The compressor and the blower are fully operated, and the set time (for example, 1 to 2 hours) and the temperature of the freezing room or ice making room can be set to -20 ° C or lower, which is lower than -18 ° C. During this low temperature operation, the time required for ice making is also shortened.

  In particular, in this example, since a temperature sensor cannot be attached to the ice tray, indirect detection for managing the ice making time from the temperature of the ice making chamber 3a is performed. Therefore, even during quick freezing, the frozen state cannot be grasped directly, and even if the actual ice making time is shortened, the temperature in the ice making chamber 3a that changes regardless of the ice making progress is detected. As a result, the decision to complete ice making could not be accelerated. Therefore, the ice making counter N-times acceleration 46d is added to improve the efficiency of ice making time.

  The flow from the start of ice making to the completion of ice making in the refrigerator having these control configurations will be described with reference to FIG. FIG. 7 (a) shows an ice making control flow, and FIG. 7 (b) is a view showing the temperature change in the ice making chamber after the start of ice making and its control. First, ice making monitoring will be described with reference to FIG.

  When water is supplied to the ice tray 23, preparation for ice making is completed and ice making is performed (A). When monitoring ice making, it is confirmed whether the freezer compartment doors 7 to 9 are closed by the IM door sensor 39 and the freezer compartment door sensor 41 (step 48). If the door is open, the ice making monitoring counter 46 is not counted up until it is closed.

  When the freezer compartment doors 7 to 9 are closed, the temperature in the ice making chamber 3a detected by the IM chamber temperature sensor 40 is compared with a preset ice making temperature EEPA. If the detected temperature is higher than the EEPROM, the process returns to step 48, and if it is lower, the process proceeds to step 50 (step 49).

  When the state of the freezer compartment doors 7 to 9 and the temperature in the ice making chamber 3a satisfy the conditions of steps 48 to 49, the ice making monitoring time is set and the timer count is started (step 50 and reference numeral 46a in FIG. 6).

  While the ice making monitoring counter 46 is counting up, the temperature in the ice making chamber 3a is constantly monitored by the IM chamber temperature sensor 40 (step 51). In step 51, the detected temperature of the IM chamber temperature sensor 40 is compared with the ice making temporary stop temperature EEPB2. The ice making temporary stop temperature EEPB2 is set to a temperature higher than the ice making monitoring temperature EEPROM, and the relationship between the set temperatures will be described later with reference to FIG.

  When the temperature in the ice making chamber 3a is lower than the ice making temporary stop temperature EEPB2, the fan ON integrated time is counted up through step 57 of the ice making count N times temperature (step 58). In step 58, it is determined whether or not the blower 19 has been operated for a preset time (for example, 50 minutes, the same applies hereinafter). If the blower 19 has been operating for 50 minutes or more from the start of ice making, the process proceeds to step 59. Details of step 57 will be described later.

  In step 59, it is determined whether or not the ice making monitoring time has been counted up. If a preset time (for example, 60 minutes, the same applies hereinafter) has elapsed since the start of ice making, the process proceeds to step 60.

  In step 60, it is determined whether or not the temperature in the ice making chamber 3a is lower than the ice making completion temperature EEPD. When the temperature detected by the IM chamber temperature sensor 40 is lower than the ice making completion temperature EEPD, it is determined that the ice making is completed, and the control device 37 controls the automatic ice making device 12 to perform the ice removing operation (B).

  As can be seen from steps 58 to 60, in order to determine that the ice making is completed, the count-up of the blower ON integrated time and the ice making monitoring time is completed, and the temperature in the ice making chamber 3a is lower than the ice making completion temperature EEPD. All conditions must be met.

  In this embodiment, the ice making monitoring time is set longer than the blower ON integrated time. Therefore, for example, when the rapid ice making operation mode is set, the blower 19 is continuously operated for 50 minutes or more. At this time, since the refrigeration cycle is also operated and the cooler 18 generates cold air, the temperature in the ice making chamber 3a is also maintained lower than the EEPD. Therefore, if the door is not opened and closed during this time, ice making is completed when the ice making monitoring time (60 minutes) elapses.

  If any of the conditions of Steps 58 to 60 is not satisfied, the process returns to Step 51 and monitoring is continued.

  The case where it is determined in step 51 that the inside of the ice making chamber 3a is higher than the ice making temporary stop temperature EEPROM2 will be described. At this time, the routine proceeds to step 52 where the timer count of the ice making monitoring time is temporarily stopped (reference numeral 46b in FIG. 6).

  Factors for determining that the inside of the ice making chamber 3a is higher than the ice making temporary stop temperature EEPB2 in step 51 include the case where the defrosting operation of the cooler 18 is performed, the case where a new cooling load is generated in the freezing chamber, The case where the ice making room door or the freezing room door has been open for a long time can be mentioned.

  When the ice making counter is suspended, the next steps are (1) when the suspended state is released and counting up is resumed, (2) when the suspended state is maintained, and (3) ice making. There are three main cases when the counter is reset.

The case of (1) above is
<Step 53> → <Step 55> → <Step 56>
It becomes the flow of
Case (2)
<Step 53> → <Step 55> → <Step 53>
It becomes the flow of
Case (3)
<Step 53> → <Step 54> → <Step 48>
It becomes the flow of.

  Each case of (1) to (3) will be described. In step 53, the temperature in the ice making chamber 3a is compared with the ice making reset temperature EEPC, and if the temperature is lower than EEPC, the process proceeds to step 55.

  In step 55, the temperature in the ice making chamber 3a is compared with the ice making resumption temperature EEPB1, and if the temperature is lower than EEPB1, the process proceeds to step 56, and the timer stop of the ice making start time is released. At this time, the ice making counter that has been temporarily stopped in step 52 is counted up again (case (1) above).

  In step 55, if the temperature in the ice making chamber 3a is higher than that of the EEPROM 1, the process returns to step 53 and repeats this (case (2) above).

  In step 53, if the temperature in the ice making chamber 3a is higher than the ice making reset temperature EEPC, the process proceeds to step 54, the ice making counter is reset, the ice making counter is set to zero, and step 48 is executed. Return to (case (3) above).

  Apart from these controls, if the door open state continues for a preset time by the IM door sensor 39 and the freezer compartment door sensor 41, the control to reset the ice making monitoring counter or the defrosting operation is unconditional. Alternatively, the ice making monitoring counter may be reset.

  However, even in these cases, efficiency can be improved by judging the degree of actual temperature rise in the ice making chamber 3a and continuing, temporarily stopping, or resetting the ice making monitoring count.

  Next, the determination process of the step 57 of the ice making counter N times temperature will be described with reference to FIG. FIG. 7B is a diagram showing the relationship between the temperature change in the ice making chamber after the start of ice making and the set temperatures during ice making. As shown in the figure, the preset temperatures include the ice making reset temperature EEPC, the ice making temporary stop temperature EEPB2, the ice making restart temperature EEPB1, the ice making start temperature EEPA, the ice making completion temperature EEPD, and the acceleration temperature EEPROM.

  Moreover, it is divided into five temperature zones according to each of these set temperatures. The temperature zone is a reset area, a pause area, a count / pause area, a count area, and an acceleration count area in descending order.

  Explaining these temperature zones, as shown in FIG. 7 (b), the temperature is a temperature zone that resets the ice making monitoring time in descending order (reset area: EEPC or higher), and the temperature zone that temporarily stops the ice making monitoring time. Temperature (temporary stop area: EEPB2 to EEPC), temperature that becomes a temperature zone for counting or temporarily stopping ice making monitoring time (count / pause area: EEPROM 1 to EEPROM 2), temperature that becomes a temperature zone for counting ice making monitoring time ( Count area: EEPROM to EEPROM 1), and temperature (acceleration count area: below EPSS), which is a temperature zone in which ice-making monitoring time is accelerated and counted.

  The ice making start temperature EEPROM and ice making completion temperature EEPD are contained in the count area, but the ice making start temperature EEPROM may be the same as the ice making restart temperature EEPROM1 (EEPA = EEPB1). At least the temperature at which ice making is started and the temperature at which ice making is completed need to be a count area.

  Moreover, as a case where the temperature in the ice making chamber 3a becomes equal to or lower than the acceleration temperature EEPS, there is a case where the refrigeration cycle is continuously operated in the quick ice making operation mode or the quick freezing operation mode.

  That is, in step 57, the count is accelerated when, for example, when the ice making chamber 3a temperature is equal to or lower than the acceleration temperature EEPROM as in the case where the rapid ice making operation mode or the like is performed, for example, for 3 minutes or more. When this condition is satisfied, the ice making counter is accelerated N times (reference numeral 46d), and the time for the automatic ice making device 12 to enter the ice removing operation can be accelerated. When the degree of acceleration is 1.5 to 2.0 times the normal count area, the ice making time can be sufficiently shortened, and the high accuracy of ice making completion determination can be maintained.

  Specific temperatures of each set temperature are, for example, -5 ° C for EEPC, -7.4 ° C for EEPROMB2, -8 ° C for EEPROM1, -8 ° C for EEPROM, -12 ° C for EEPD, and -20 ° C for EEPROM. If this is done, it is possible to achieve efficiency in ice making time, high accuracy, and ice making completion determination.

  Next, with reference to FIG. 7B, the ice making count associated with the temperature change during ice making monitoring will be described. In the example of FIG. 7B, ice making is started, and first reaches point A. Since the point A is in the temperature zone of the count area, the ice making monitoring time is set in step 50 and the timer count is continued.

  When the doors 7 to 9 are opened or the cooling load is stored in the freezer compartment, the temperature in the ice making chamber 3a rises to the temperature in the point B count / pause area. During this time, monitoring is continued in step 51. However, in the case of point B, since the ice making temporary stop temperature EEPB2 has not been reached, the timer count continues and the count-up proceeds.

  After that, when the doors 7 to 9 are opened for a long time or the cooling load is stored in the freezer compartment, or further when there is a defrosting operation, the temperature is detected by the IM room temperature sensor 40 up to the temperature in the temporary stop area. When the temperature rises and reaches point C, the routine proceeds from step 51 to step 52, where the timer count is temporarily stopped.

  In the process of reaching the point D, the temporarily stopped timer count is restarted when the temperature in the ice making chamber 3a becomes lower than the ice making restart temperature EEPB1.

  That is, in the count / pause area that is higher than the ice making suspending temperature EEPROM2 and lower than the ice making resuming temperature EEPB1, there can be a state where the counting is continued and a state where the counting is paused. . Specifically, the temperature rises while the count-up continues, the count-up continues when entering the count / pause area, and the temperature drops and counts-down while the count-up is paused. / When entering the temporary stop area, the state where the count-up is temporarily stopped is continued.

  The temperature drops from point C to point D in the temperature zone of the acceleration count area, which is a temperature zone lower than the acceleration temperature EEPROM. If this temperature zone continues for, for example, 3 minutes, the count-up is accelerated by 1.5 to 2.0 times by the ice making acceleration determination process of the ice making count N times temperature in step 57.

  Thereafter, when the defrosting operation, the continuation of the open state of the door, and the input of the cooling load overlap, the temperature greatly increases to the temperature zone of the reset area higher than the ice making reset temperature EEPC (point E). At this time, the count-up has already been paused through step 51, and at point E, the process proceeds from step 53 to step 54.

  If the temperature in the ice making chamber 3a rises even once to the temperature zone of the reset area, the timer count is reset, and ice making is counted from zero when the room temperature drops to the ice making start temperature EEPA.

  In this way, by controlling with the ice making monitoring counter 46, it is possible to reliably detect ice making although it is indirect temperature detection. Moreover, the ice making can be completed in an appropriate time without unnecessarily prolonging the time required for ice making.

  Next, the relationship between the temperature of water or ice in the ice tray 32 and the IM chamber temperature sensor 40 will be described with reference to FIG. FIG. 8 is a diagram showing the relationship between the temperature of water or ice in the ice tray 32 and the temperature detected by the temperature sensor 40. These show the transition of the state where there is no pause or reset of the ice making count.

  A curve α indicated by a broken line in FIG. 8 indicates a change in water temperature (ice temperature) from the start of ice making to the completion of ice making, and a curve β indicated by a solid line indicates ice making detected by the IM chamber temperature sensor 40 during that time. The temperature in the chamber 3a is shown.

  The time required to complete the ice making after the water is supplied from the water storage tank 11 to the ice tray 23 is 60 minutes to 90 minutes (herein, it will be described as 60 minutes). Of this time, as shown by curve α, about 2/3 of the time is in an unfrozen state around 0 ° C. Then, after the time of about 2/3 has elapsed, the remaining time until completion of ice making is already solidified and becomes ice, and the temperature of this ice reaches, for example, −12 ° C. or lower.

  During this time, the temperature in the ice making chamber 3a detected by the IM chamber temperature sensor 40 changes as shown by a curve β. The temperature in the ice making chamber 3a has changed as indicated by the curve β in the temperature zone in the count area since the start of ice making.

  Now, area P and area Q shown in the figure indicate time zone areas. Area P is a time zone in which the above-mentioned unfrozen state is assumed, and area Q is a time zone in which ice is assumed. Depending on these time zone areas, the ice making continuation conditions are changed to further improve the efficiency by shortening the ice making time. A predetermined time from the start of ice making is counted separately from the ice making monitoring counter or using the ice making monitoring counter. For example, the area P and the area Q are divided at 40 minutes from the start of ice making, and a part (or all) of the set temperature is changed.

  The reason for managing ice making time in two time zones is due to the difference in specific heat between water and ice. That is, even if the ambient temperature rises, it is difficult to raise the temperature of ice compared to water. That is, even when the temperature of the ice making chamber 3a rises when the door is opened or when the cooling load is put into the freezer compartment, the influence received by the state of water or ice in the ice tray is different. . Therefore, in area Q, the count area upper limit temperature EEPROM1 is increased to EEPB3, which is a higher temperature, to increase the width of the count area.

  Further, the ice making temporary stop temperature EEPB2 is also set to a temperature higher than the area P, thereby relaxing the condition that the ice making monitoring count is continued without being paused.

  Thus, by setting different conditions in the time zone area, it is possible to make ice making more efficiently. Even if the temperature in the ice making chamber 3a detected by the IM chamber temperature sensor 40 rises, it is not necessary to temporarily stop ice making depending on the degree of the rise. Since the area Q is not easily affected by the temperature change, the count area is set to be large, and therefore the ice making count may not be interrupted. Therefore, efficient ice making can be performed without significantly extending the ice making time of 60 minutes.

  These time conditions depend on the size of the ice being made. When making different sizes of ice by changing the amount of water supply, it is only necessary to set the counting time longer, and it is not necessary to change each set temperature.

  When the temperature in the ice making chamber 3a changes as shown in FIG. 8, each counter from the start of ice making to the completion of ice making changes as follows. This example is an example in which the count is not temporarily stopped or reset, and is not set in the rapid ice making operation mode or the like, and the count is not accelerated. That is, the simplest case is shown.

  When ice making is started, an ice making monitoring counter is counted. Since the ice-making monitoring counter completes counting up in 60 minutes, the counting continues continuously for 60 minutes. During this time, the blower 19 repeats ON and OFF. The blower ON integration counter 47 continues counting only while the blower 19 is operating.

  A counter for distinguishing between area P and area Q is counted up while the ice making monitoring counter is counted. Since this counter is counted up in 40 minutes, it always moves from area P to area Q before ice making is completed.

  In area Q, the temperature condition changes as described above. In this example, however, there is no particular benefit. Further, when the count of the ice making monitor counter continues and the count up is completed, the blower ON integration counter counts up. Since it has been completed, the ice making is completed. This ice making operation is an example of processing in steps 51, 58, 59, and 60 in the flowchart of FIG.

  According to the embodiment described above, the following effects can be obtained.

  The drive motor 26 is installed on the back wall side of the freezer compartment, the output shaft 26a of the drive motor 26 receives the bearing shaft 23b on the back side of the ice tray 23, and the other shaft 23a is received by the bearing 25 with a lid. Therefore, the ice tray 23 can be pulled out to the front side by releasing the engagement with the drive motor 26. In addition, since the ice making tray 23 is inverted when the ice tray 23 is attached to the control device 37 for controlling the drive motor 26, the user can easily clean the ice tray, etc. The motor lock can be avoided without becoming plate ice.

  Even when the motor lock occurs, the function of returning the ice tray 23 to the origin position (the position at which the ice tray 23 is in a horizontal state) is added, so that the user himself can make the ice tray 23 without asking a serviceman. It can be corrected by attaching and detaching.

  In addition, when an abnormality such as a motor lock occurs, the abnormality is notified to the user by an external notification means.

  In addition, when the ice tray 23 is removed for a short time, the ice tray 23 is pulled out for confirmation of the ice making state because the ice making tray 23 is controlled to be continued without performing the reversing operation or the like. In some cases, the ice making time is not unnecessarily delayed.

  Regarding efficiency improvement of ice making time, it is possible to minimize delay in ice making time without directly detecting the temperature of the ice making tray. Further, even if the time condition is satisfied, the deicing is not started unless the ice making completion temperature condition is satisfied, so that it is possible to reliably prevent the deicing operation from being performed in an uniced state. In addition, since various conditions of ice making monitoring are changed according to the time area, further efficiency can be achieved.

The perspective view of the refrigerator of a present Example. The longitudinal cross-sectional view which shows the principal part of a present Example. Sectional drawing which shows the structure of an automatic ice making apparatus. The figure which shows the structure of the automatic ice making apparatus at the time of ice tray attachment / detachment. The block diagram which shows a part of control structure of a present Example. The block diagram which shows the control structure which concerns on the ice making control of a present Example. The figure which shows the temperature change of the ice making chamber after the ice making control flow and ice making start, and its control. The figure which shows the relationship between the temperature of water or ice, and the temperature in an ice making chamber.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body, 2 ... Refrigeration room, 3 ... Upper stage freezing room, 3a ... Ice making room, 4 ... Lower stage freezing room, 7 ... Ice making room door, 9 ... Freezing room door, 11 ... Water storage tank, 12 ... Automatic ice making apparatus, DESCRIPTION OF SYMBOLS 13 ... Ice storage container, 19 ... Blower, 21 ... Water supply pipe, 22 ... Water supply pump, 23 ... Ice tray, 23a ... Shaft, 23b ... Bearing shaft, 23c ... Locking part, 24 ... Heat insulation partition wall, 25 ... Bearing, 26 DESCRIPTION OF SYMBOLS ... Drive motor, 26a ... Output shaft, 27 ... Frame, 28 ... Mounting plate, 28a ... U-groove, 30 ... Ice detecting lever, 33 ... Ice tray detection sensor, 37 ... Control device, 38 ... IM mode switching SW, 39 ... IM door sensor, 40 ... Temperature sensor (IM room temperature sensor), 41 ... Freezer compartment door switch, 42 ... Buzzer, 43 ... IM mode display LED, 44 ... Ice tray drawer monitoring timer, 45 ... Position securing signal, 46 ... Ice-making monitoring counsel Over, 47 ... blower ON accumulated time counter.

Claims (7)

From a blower that blows cold air to the ice making chamber, an automatic ice making device disposed in the ice making chamber, and a path of cold air that is discharged from the back of the ice making chamber by the blower and flows to the ice making tray in the automatic ice making device An ice-making chamber temperature sensor attached to a remote place, and a control device that determines completion of ice making and controls the automatic ice making device to perform an ice removing operation;
The ice making count is started after the detected temperature of the ice making chamber temperature sensor becomes equal to or lower than a predetermined temperature, the ice making count completes a predetermined count-up, and the accumulated operation time of the blower is a predetermined time from the start of the ice making count. The refrigerator is characterized in that when it becomes, the ice making operation is judged to be completed.   The control device continues the ice making count when the detected temperature of the ice making chamber temperature sensor is lower than the first set temperature, and temporarily stops the ice making count when the detected temperature becomes higher than the first set temperature. The refrigerator according to claim 1, wherein the ice making time is managed by resetting the ice making count when the temperature becomes higher than a second set temperature set higher than the set temperature.   When the detected temperature of the ice making chamber temperature sensor becomes higher than the first set temperature and the ice making count is temporarily stopped, the first setting is performed even if the detected temperature becomes lower than the first set temperature. The refrigerator according to claim 2, wherein the ice making count is temporarily stopped when the temperature is higher than a third set temperature set lower than the temperature.   The control device counts the ice making count when the output temperature of the ice making chamber temperature sensor is lower than a third set temperature set lower than the first set temperature for a preset time. The refrigerator according to claim 2 or 3, wherein the refrigerator is accelerated.   2. The freezing room including the ice making room is closed by a door, and includes a door sensor for detecting an open / closed state of the door, and the completion of ice making is determined based on an output from the door sensor. The refrigerator in any one of thru | or 4.   The refrigerator according to any one of claims 2 to 5, wherein the set temperature value varies depending on the time since ice making is started.   The refrigerator according to any one of claims 1 to 6, wherein the ice making chamber temperature sensor is attached to a frame forming an outer shell of the automatic ice making device.

Images