JP2017156026A - Cooling box and opening/closing control method of opening/closing door of cooling box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling box which has automated opening/closing of a slide type opening/closing door.SOLUTION: A cooling box includes: a cooling box body 10 in which an opening is formed at one part of a box body; a slide type opening/closing door 11 for opening/closing the opening; an opening/closing switch 12 provided at the opening/closing door 11; a transmission unit 13 provided on the opening/closing door 11 side and for transmitting an operation signal according to the operation of the opening/closing switch 12 wirelessly; a reception unit 14 provided on the cooling box body 10 side and for receiving the operation signal transmitted from the transmission unit 13; and a drive unit 15 for opening/closing the opening/closing door 11 based on the reception result of the operation signal by the reception unit 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cool box that electrically opens and closes a sliding door and a control method for opening and closing the door of the cool box.

  As means for automatically opening and closing the door of the cold storage, for example, an automatic door opening and closing device shown in Patent Document 1 may be employed. This automatic door opening and closing device has an operation unit provided on the front side of the rotary door, each circuit such as a sensor circuit provided on the cold storage body side, and an electrical signal from the operation unit facing the door. Door opening means driven by When the user operates the operation unit, an external force accompanying this operation is applied to the piezo cable and an electrical signal is generated. This electrical signal is sent to a sensor circuit provided on the main body side of the cool box through a wiring passed through a hinge that rotatably supports the door. The electrical signal processed by this sensor circuit is sent to the microcomputer, and the rod of the door opening means is driven in the axial direction by the signal from this microcomputer. Then, the rod is brought into contact with the door so as to push it forward, and the door is opened.

JP 2007-93038 A

  Since the door shown in Patent Document 1 is a pivoting type, wiring is passed through a hinge that is not relatively displaced with respect to the main body of the cool box, and an electrical signal from the operation unit can be sent to the sensor circuit through this wiring. However, in the case of a sliding door without a hinge, it is difficult to provide wiring that transmits an operation signal from the opening / closing switch provided on the door to the drive unit provided on the cooler body side. There is a problem that is difficult to automate.

  Therefore, an object of the present invention is to automate the opening and closing of a sliding door.

  In order to solve the above-described problems, the present invention provides a cool box body in which an opening is formed in a part of a box, a sliding opening / closing door that opens and closes the opening, and an opening / closing provided in the opening / closing door. A switch, a transmission unit provided on the open / close door side for wirelessly transmitting an operation signal associated with the operation of the open / close switch, and the operation signal transmitted from the transmission unit; A cool box including a receiving unit provided and a drive unit that opens and closes the door based on the reception result of the operation signal by the receiving unit is configured.

  As described above, since the operation signal is transmitted wirelessly between the open / close switch and the drive unit, it is not necessary to provide a signal transmission wiring, so that the cooler main body and the open / close door relatively move. The opening and closing of the door can be automated.

  The configuration further includes a control unit that measures at least one of an opening time and a closing time of the opening / closing door and issues a control signal for opening / closing the opening / closing door to the drive unit based on these times. It is preferable to adopt a configuration.

  When a wireless opening / closing switch is employed, it may happen that the receiving unit receives external noise and the opening / closing door opens carelessly. In this case, since the user does not perform the door opening operation, the user is less likely to notice that the open / close door is in the open state. For this reason, the cool air in a store | warehouse | chamber escapes and the temperature in a store | warehouse | chamber rises, the foodstuff in a store | warehouse | chamber is damaged, or the problem that electric power consumption increases arises. Further, even when the user opens the door with his own intention, the user may forget to close the door. In this case, the same problem as when the door is opened due to noise occurs. Therefore, the door opening time is measured by the control unit. For example, when the door opening time is equal to or longer than a predetermined limit time, the door is opened by noise by closing the door with a signal from the control unit. Even when the user forgets to close the door, the door can be closed reliably, and it is possible to reliably prevent food from being damaged and power consumption from increasing.

  Immediately after closing the open / close door, the outside air that has entered the interior when the open / close door is opened is rapidly cooled, the volume contracts, and the interior is in a negative pressure state. In this negative pressure state, a large load is applied to the drive unit that opens and closes the door. In order to eliminate this negative pressure state, it takes several seconds to several tens of seconds depending on the structure of the cold storage (whether or not an intake valve is provided). Therefore, the closing time is measured. For example, when the closing time is equal to or shorter than a predetermined protection time (time until the negative pressure state is resolved to some extent), the operation of the opening / closing switch is invalidated (the opening / closing switch is operated). By not driving the drive unit), it is possible to protect the drive unit by preventing a large load from being generated on the drive unit when the door is opened and closed.

  In each of the above configurations, it is preferable to further include a human sensor that detects the presence of a person. In this way, by providing a human sensor, when the user of this cold storage is near, the door is not operated so that the user is sandwiched between the doors or enclosed in the cold storage. Can be prevented.

  In each said structure, it is preferable to set it as the structure further provided with the display part which shows the operating state of the said door. For example, a light-emitting diode can be used as the display unit, and is green (lit) during standby (opened or closed), green (flashing) during opening and closing, red (lit) immediately after closing, abnormal Sometimes the lighting color and lighting pattern are changed corresponding to the operating state such as red (flashing). Thus, by providing the display unit, the user can easily know the operating state. Thus, instead of employing a light emitting diode, the operating state may be displayed by characters.

  Further, in the present invention, the transmission unit provided on the opening / closing door side in accordance with the opening / closing operation of the opening / closing switch provided on the sliding opening / closing door that opens and closes the opening formed on the front surface side of the cool box main body. A step of wirelessly transmitting an operation signal from the transmission unit, a step of receiving the operation signal transmitted from the transmission unit by a reception unit provided on the cold storage body side, and a reception result of the operation signal by the reception unit And opening and closing the door by driving the drive unit. The opening / closing control method for the door of the cold storage is provided.

  In this way, by automatically transmitting / receiving an operation signal associated with the operation of the opening / closing switch, as described above, the opening / closing of the sliding opening / closing door in which the cooler main body and the opening / closing door move relatively is achieved. be able to.

  In the above-described configuration, a step of measuring the time since the opening / closing door is in an open state, and automatically driving the drive unit to close the opening / closing door when this time is equal to or longer than a predetermined limit time. It is preferable to provide the configuration. In this way, as described above, even when the opening / closing door is closed when the opening time exceeds the limit time, and this opening / closing door is opened due to noise or the user forgets to close it, The door can be closed reliably, and food can be prevented from being damaged and power consumption can be reliably prevented from increasing.

  In each of the above-described configurations, the time after the opening / closing door is in a closed state is measured, and the operation includes the step of invalidating the operation of the opening / closing switch when this time is equal to or less than a predetermined protection time. preferable. In this way, as described above, it is possible to protect the drive unit by preventing a large load from being generated on the drive unit when the door is opened and closed.

  In this invention, the cool box main body in which an opening is formed in a part of the box, a sliding opening / closing door that opens and closes the opening, an opening / closing switch provided on the opening / closing door, and the opening / closing switch An operation signal transmitted by operation is transmitted wirelessly, a transmission unit provided on the opening / closing door side, and a reception unit provided on the cold storage body side for receiving the operation signal transmitted from the transmission unit; And a drive unit that opens and closes the open / close door based on the reception result of the operation signal by the receiving unit, or a slide that opens and closes an opening formed on the front side of the cool box body In accordance with the opening / closing operation of the opening / closing switch provided on the open / close door of the type, a step of transmitting an operation signal wirelessly from the transmission unit provided on the opening / closing door side, and a transmission from the transmission unit A step of receiving the operation signal by a receiving unit provided on the cooler body side, and a step of driving the drive unit to open and close the open / close door based on the reception result of the operation signal by the receiving unit. And an open / close control method for the open / close door of the cool box.

  According to the present invention, since the operation signal is transmitted wirelessly between the open / close switch and the drive unit, and there is no need to provide a signal transmission wiring, the cooler main body and the open / close door move relatively. The opening and closing of the door can be automated.

1 shows one embodiment of a cold storage according to the present invention, (a) is a front view, (b) is a plan view. The principal part of the cool box shown in FIG. 1 is shown, (a) is a top view, (b) is a perspective view. The perspective view which shows the principal part of the cool box shown in FIG. Plan view of the cool box shown in FIG. The flowchart which shows the opening-and-closing control flow of the door of the cool box shown in FIG.

  One embodiment of the cool box according to the present invention is shown in FIGS. This type of cold storage is installed mainly for business use in restaurants and food warehouses. The cool box includes a cool box main body 10, a slide-type open / close door 11 (11 a, 11 b), an open / close switch 12, a transmission unit 13, a reception unit 14, and a drive unit 15 as main components. In addition, in this figure, in order to make a structural member easy to see, the state which removed the front cover normally provided in the front upper part side of the cool box is shown.

  The cool box main body 10 is a box having an opening formed on the front side. Two slide-type opening / closing doors 11 (a left-side opening / closing door 11a and a right-side opening / closing door 11b) that open and close the opening are provided on the front side of the cool box body 10. The left and right open / close doors 11a and 11b are arranged side by side on the left and right sides when the door is closed, so that either the left or right open / close door 11a or 11b comes to the front side of the other open / close door 11a or 11b. The door is opened by sliding left and right (see FIG. 4). The opening / closing mechanism of the two doors 11a and 11b will be described later.

  The open / close switch 12 is provided on the front panel of each of the two open / close doors 11a and 11b. As the open / close switch 12, various types such as a push button type and a touch sensor type (capacitance type) can be adopted. By operating this open / close switch 12, the open / close doors 11a and 11b can be opened and closed. Thus, by providing the opening / closing switch 12 on the front panel, the user can easily perform the operation.

  The open / close switch 12 is provided with a display unit 16 that indicates the operating state of the open / close doors 11a and 11b. The display unit 16 is a light emitting diode type display lamp, and a lighting color and a lighting pattern change according to an operating state. For example, when the open / close doors 11a and 11b are opened or closed (when the open / close doors 11a and 11b are not in operation), the green lights up. When trouble occurs in the wireless communication state between the units 13 and 14, the drive unit 15 or the like, it can be flashed in red, and can be lit in red when the doors 11a and 11b described later are locked. In addition, this lighting color and lighting pattern are illustrations, and can be changed as appropriate. During the opening / closing operation of the open / close doors 11a and 11b, the operating state can be displayed by the display unit 16 and a buzzer (not shown) can be sounded. Thereby, it is easy for surrounding people to notice that the open / close doors 11a and 11b are being opened and closed, and high safety can be ensured.

  A handle 17 is provided in the vicinity of the opening / closing switch 12. If the open / close doors 11a and 11b do not open or close even when the open / close switch 12 is operated due to a problem with the wireless communication between the transmission / reception units 13 and 14 or the drive unit 15 or the like, hold the handle 17 and open the open / close doors 11a and 11b. Can be opened and closed manually.

  The transmission unit 13 has a function of wirelessly transmitting an operation signal associated with the operation of the opening / closing switch 12, and is provided on the opening / closing doors 11a, 11b side. The transmission unit 13 can be integrated with the open / close switch 12 as shown in FIG. The receiving unit 14 has a function of receiving the operation signal transmitted from the transmitting unit 13 and is provided on the cool box main body 10 side. As described above, since the operation signal is transmitted and received wirelessly, the open / close doors 11a and 11b can be easily removed or replaced during maintenance of the cold storage.

  The drive unit 15 has a function of opening and closing the doors 11a and 11b based on the reception result of the operation signal by the receiving unit 14, and is provided in each of the left and right doors 11a and 11b. As this drive unit 15, a motor is employed in this embodiment.

  A control unit 18 (control microcomputer) is provided on the cool box body 10 side. The control unit 18 measures the opening time of the open / close doors 11a, 11b (the time when the open / close doors 11a, 11b are open) and the close time (the time when the open / close doors 11a, 11b are closed), respectively. When the door time is equal to or longer than a predetermined limit time, a control signal for closing the open / close doors 11a and 11b is issued to the drive unit 15 while the door closing time is equal to or shorter than the predetermined protection time. The operation of the open / close switch 12 is disabled, and the control signal for the drive unit 15 is cut off.

  It is preferable that the control unit 18 controls the operation of a cooling fan (not shown) provided in the storage at a low speed or to be stopped when the doors 11a and 11b are opened. By performing the operation control in this way, it is possible to prevent the cool air inside the warehouse from escaping outside the compartment along with the operation of the cooling fan, thereby improving the cooling efficiency and reducing the power consumption. it can. Moreover, the defrosting time of the cooler (not shown), the implementation period of the defrosting operation, and the like can be adjusted based on the number of times the doors 11a and 11b are opened and closed and the accumulated time of the open door state. By performing such adjustment, it is possible to prevent the defrosting operation from being performed unnecessarily in a state where the opening / closing doors 11a and 11b are opened and closed few times and the cooler is hardly frosted. For this reason, it is possible to reduce power consumption.

  The opening / closing mechanism of the opening / closing doors 11a, 11b has a left guide rail 19 provided in the left-right direction substantially in the left half of the upper portion of the opening toward the opening of the cool box body 10, and an upper portion of the opening. A right guide rail 20 provided substantially in the right half of the right side, a first guide member 21 provided at the upper end of the doors 11a and 11b and guided by the left guide rail 19, and the doors 11a and 11b. The second guide member 22 provided at the upper end of the guide and guided by the right guide rail 20 is a main component.

  The left guide rail 19 is provided on the upper side of the right guide rail 20, and the guide rails 19 and 20 partially overlap each other at the center in the left-right direction of the cool box body 10. Both guide rails 19, 20 are provided with straight portions 19 a, 20 a that extend straight from side to side, and bent portions 19 b, 20 b that are connected to both ends of the straight portions 19 a, 20 a and are bent toward the back side of the cool box body 10. Have The front sides of both guide rails 19 and 20 are open, and pulleys 23 are provided at the ends of the left and right bent portions 19b and 20b.

  Each of the first guide member 21 and the second guide member 22 includes a pair of guide wheels 21a, 21a, 22a, 22a guided between the front and rear wall surfaces of the guide rails 19, 20, and the guide rails 19, 20 Rolling wheels 21b and 22b that roll on the bottom surface of them, rotating shafts 21c and 22c that support the guiding wheels 21a and 22a and the rolling wheels 21b and 22b around a vertical axis, and guide wheels 21a and 22a. The rolling wheels 21b and 22b and the bases 21d and 22d for holding the rotating shafts 21c and 22c, and the connecting members 21e and 22e for connecting the bases 21d and 22d and the doors 11a and 11b are provided. . The connecting member 21e used for the first guide member 21 has a shape bent in the vertical direction corresponding to the difference in installation height between the left guide rail 19 and the right guide rail 20. In both the left door 11a and the right door 11b, the first guide member 21 is guided by the left guide rail 19, while the second guide member 22 is guided by the right guide rail 20 (see FIG. 1A). .

  In the closed state of the doors 11a and 11b, the first and second guide members 21 and 22 of the doors 11a and 11b are positioned at the bent portions 19b and 20b of the left and right guide rails 19 and 20, respectively. When the left and right open / close doors 11a and 11b are opened, the first and second guide members 21 and 22 located at the bent portions 19b and 20b are connected to the straight portions 19a and 20a of the left and right guide rails 19 and 20, respectively. And is guided in the left-right direction by the straight portions 19a, 20a. Since the first guide members 21 and the second guide members 22 of the left and right open / close doors 11a and 11b are guided by the common guide rails 19 and 20, the left and right open / close doors 11a and 11b are simultaneously opened. It cannot be.

  A drive wire 24 is connected to the bases 21d and 22d. The drive wire 24 is provided in the left and right guide rails 19 and 20 along the length direction thereof. The pulley 23 provided on one end side of the guide rails 19 and 20, the drive unit 15, and the guide rails Via the pulleys 23 provided on the other end side of 19 and 20 in sequence, the guide rails 19 and 20 are again connected to the bases 21d and 22d. A cover member 25 is provided on the drive wire 24 between the pulley 23 and the drive unit 15 (that is, outside the guide rails 19 and 20), and friction between the drive wire 24 and the surrounding members is reduced. This is prevented (see FIG. 4).

  When the drive unit 15 is driven, the drive wire 24 suspended in an annular shape is drawn out in one direction, and the bases 21d and 22d (guide members 21 and 22) connected to the drive wire 24 are guided to the guide rail 19 in that direction. 20 is guided along. Accordingly, the open / close doors 11a and 11b are opened and closed.

  A human sensor 26 is provided in the cool box main body 10. By providing the human sensor 26, the operation of the opening and closing doors 11a and 11b can be stopped when the user of the cold storage is nearby. Thereby, it can prevent that a user is pinched | interposed into the opening-and-closing doors 11a and 11b, or is confined in the store | warehouse | chamber of a cold storage. In the event that pinching occurs, the control unit 18 detects an abnormal signal such as a fluctuation in the current value of the drive unit 15 or an abnormal pulse due to the pinching, and the opening / closing operation of the open / close doors 11a and 11b is immediately performed. Stop. Further, the buzzer can be sounded together with the stop of the opening / closing operation. As a result, it is possible to quickly notify that an abnormality has occurred during the opening / closing operation.

  It is also possible to record information such as the opening / closing operation of the cold storage in the control unit 18 and transfer the record to the outside by communication means (not shown). By doing in this way, the driving | running state of a cold storage can be grasped | ascertained in a remote place, and when a malfunction arises in this cold storage, it can respond quickly.

  FIG. 5 shows an open / close control flow of the open / close doors 11a and 11b of the cool box shown in FIG. This open / close control flow starts from a state in which both the left and right open / close doors 11a and 11b are closed.

  First, the elapsed time since the left and right open / close doors 11a and 11b are closed is measured by the control unit 18, and it is determined whether or not the elapsed time is equal to or less than a predetermined protection time (see step S1 in the figure). When the open / close doors 11a and 11b are opened, the outside air around the cold storage room flows into the inside of the cabinet, and the outside air rapidly cools to reduce its volume, and the inside of the cabinet is in a negative pressure state for a while from the closed door. It becomes. The negative pressure exerts a force to pull the open / close doors 11a, 11b to the inside of the cabinet (a force to close the open / close doors 11a, 11b). Therefore, when the door is opened against this force, a large force is applied to the drive unit 15. There may be a load.

  Therefore, for a while after the opening / closing doors 11a and 11b are closed (when the elapsed time is equal to or shorter than the protection time (Y side in step S1)), even if the opening / closing switch 12 is operated, the operation becomes invalid. The doors 11a and 11b cannot be opened by being locked, thereby preventing a large load from being generated on the drive unit 15. This protection time varies depending on whether or not the cold storage is provided with an intake valve that allows air inside and outside the compartment, but the time until a large load is applied to the drive unit 15 when the door is opened (for example, several seconds) To about several tens of seconds).

  On the other hand, when the elapsed time after closing the left and right open / close doors 11a and 11b has passed the protection time (N side of step S1), it is determined whether or not the open / close switch 12 has been operated by the user. (See step S2 in the figure). When the open / close switch 12 is not operated (N side in step S2), the standby state continues until the open / close switch 12 is operated. On the other hand, when the opening / closing switch 12 is operated (Y side of step S2), the driving unit 15 is driven by issuing a control signal for opening the opening / closing doors 11a, 11b from the transmitting unit 13 to the receiving unit 14. Opening and closing doors 11a and 11b are opened with a speed pattern (see step S3 in the figure).

This first speed pattern includes, for example, (1) an acceleration stage (gradual acceleration from speed v = 0 to v ₁ ), (2) a constant speed stage (moving at a constant speed of speed v ₁ ), and (3) a deceleration stage. (Speed v = v gradually decelerates from ₁ to 0). As described above, the speed change immediately after the opening and closing of the opening and closing doors 11a and 11b is moderated can be prevented from being caught during the opening and closing operation. In the case of the cool box shown in FIG. 1 and the like, while the first and second guide members 21 and 22 are guided along the bent portions 19b and 20b of the guide rails 19 and 20, the speed corresponding to the acceleration stage or the deceleration stage. While the doors 11a and 11b are opened and closed, and the first and second guide members 21 and 22 are guided along the straight portions 19a and 20a of the guide rails 19 and 20, the doors are opened at a speed corresponding to the constant speed stage. It is preferable to open and close 11a and 11b. In addition, said 1st speed pattern is only an illustration, and can be suitably changed as long as the safety | security when opening the doors 11a and 11b can be ensured.

  Next, it is determined whether or not the open / close switch 12 is operated in a state where the open / close doors 11a and 11b are opened (see step S4 in the figure). When the opening / closing switch 12 is operated (Y side in step S4), the transmission unit 13 sends a control signal for closing the opening / closing doors 11a, 11b to the receiving unit 14 to drive the drive unit 15, and the opening / closing doors 11a, 11b are turned on. close up. As described above, when the open / close doors 11a and 11b are closed by operating the open / close switch 12, the open / close doors 11a and 11b are controlled so as to move in the first speed pattern as in the case of the open door (this figure). Step S5 in the middle).

  On the other hand, when the opening / closing switch 12 is not operated (N side in step S4), it is determined whether or not the elapsed time in the state where the opening and closing doors 11a and 11b are opened is equal to or longer than the limit time (step in the figure). (See S6). When this elapsed time is shorter than the limit time (N side of step S6), it is continuously determined whether or not the open / close switch 12 has been operated (see step S4 in the figure).

  On the other hand, when the elapsed time with the open / close doors 11a and 11b opened is equal to or longer than the limit time (Y side in step S6), the drive unit 15 is automatically driven to close the open / close doors 11a and 11b. . As described above, the elapsed time is equal to or longer than the limit time when the doors 11a and 11b are inadvertently opened against the user's intention due to noise, or when the user opens the door with his own intention. In many cases, the user forgets to close the door and the user is not aware of the open state. In such a case, when the doors 11a and 11b are closed at a normal moving speed (first speed pattern), a user who is not aware that the doors 11a and 11b are automatically closed is being opened and closed. Troubles such as contact with 11a and 11b may occur.

  Therefore, when the doors 11a and 11b are automatically closed, the doors 11a and 11b are controlled with a second speed pattern whose moving speed is smaller than the first speed pattern (see step S7 in the figure). Troubles such as the user touching the doors 11a and 11b during the closing operation are prevented.

Like the first speed pattern, this second speed pattern is, for example, (1) acceleration stage (gradual acceleration from speed v = 0 to v ₂ ), (2) constant speed stage (at a constant speed of v ₂ ). Movement), (3) deceleration stage (speed v = v gradually decelerates from ₂ to 0). Velocity v ₂ of the constant velocity stage in the second speed pattern is set smaller than the speed v ₁ of the constant velocity stage of the first speed pattern, thereby automatically closing door 11a, when 11b is closed Ensures safety. As described above, when the open / close doors 11a and 11b are automatically closed, it is preferable to sound a buzzer to alert the people around.

  When the human sensor 26 detects the approach of the person during the opening / closing operation of the opening / closing doors 11a, 11b, the opening / closing doors 11a, 11b operate according to either the first speed pattern or the second speed pattern. Regardless of whether or not the doors 11a and 11b are opened and closed immediately.

  The above embodiment is merely an example of the cool box according to the present invention and the open / close control method of the open / close doors 11a, 11b of the cool box, and automates the opening / closing of the slide type open / close doors 11a, 11b. As long as the problems of the present invention can be solved, it is allowed to appropriately change the arrangement, shape and the like of each component. For example, the configuration of the present invention can be applied to a cool box that opens and closes the doors 11a and 11b by a mechanism different from the opening and closing mechanism of the doors 11a and 11b shown in FIG.

DESCRIPTION OF SYMBOLS 10 Cold storage main body 11 (11a, 11b) Opening / closing door 12 Opening / closing switch 13 Transmission unit 14 Reception unit 15 Drive unit 16 Display part 17 Handle 18 Control unit 19 Left guide rail 19a Straight part 19b Bending part 20 Right guide rail 20a Straight part 20b Bending portion 21 First guide member 21a Guide wheel 21b Rolling wheel 21c Rotating shaft 21d Base 21e Connecting member 22 Second guide member 22a Guide wheel 22b Rolling wheel 22c Rotating shaft 22d Base 22e Connecting member 23 Pulley 24 Drive wire 25 Cover member 26 Human sensor

Claims (7)

A cool box main body (10) in which an opening is formed in a part of the box;
A sliding door (11) for opening and closing the opening;
An open / close switch (12) provided on the open / close door (11);
A transmission unit (13) provided on the open / close door (11) side for wirelessly transmitting an operation signal accompanying the operation of the open / close switch (12);
A receiving unit (14) provided on the cold storage body (10) side for receiving the operation signal transmitted from the transmitting unit (13);
A drive unit (15) for opening and closing the open / close door (11) based on a reception result of the operation signal by the reception unit (14);
Cold storage with   Control for measuring at least one of the opening time and closing time of the door (11) and issuing a control signal for opening and closing the door (11) to the drive unit (15) based on the time. The cool box according to claim 1, further comprising a unit (18).   The cool box according to claim 1 or 2, further comprising a human sensor (26) for detecting the presence of a person.   The cool box according to any one of claims 1 to 3, further comprising a display unit (16) indicating an operating state of the open / close door (11). Along with the opening / closing operation of the opening / closing switch (12) provided on the sliding opening / closing door (11) for opening / closing the opening formed on the front side of the cool box main body (10), the opening / closing door (11) side is opened. Wirelessly transmitting an operation signal from the provided transmission unit (13);
Receiving the operation signal transmitted from the transmission unit (13) by a reception unit (14) provided on the cold storage body (10) side;
Based on the reception result of the operation signal by the receiving unit (14), driving the drive unit (15) to open and close the open / close door (11);
Control method for opening and closing the door of a refrigerator.   The time from when the open / close door (11) is opened is measured, and when the time exceeds a predetermined limit time, the drive unit (15) is automatically driven to open the open / close door (11). The opening / closing control method of the opening-closing door of the cool box of Claim 5 further provided with the process of closing.   6. The method according to claim 5, further comprising a step of measuring a time since the open / close door (11) is closed, and invalidating the operation of the open / close switch (12) when the time is equal to or shorter than a predetermined protection time. The opening / closing control method of the opening / closing door of the cool box as described in 6.

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