JP4290138B2 - Low temperature storage - Google Patents

Description

  The present invention relates to a cryogenic chamber in which a storage chamber is formed in a heat insulating box, and an opening of the storage chamber is closed with a heat insulating door so as to be freely opened and closed.

Conventionally, a low temperature warehouse for logistics has a storage room configured in a heat insulating box, and the opening of the storage room is closed with a heat insulating door so that it can be opened and closed, and the storage room is cooled by a cooler, a cold storage member, etc. Stored items are stored in a refrigerated state. In this case, the heat insulation door is provided with a handle (handle) for opening and closing, and the heat insulation door is opened and closed by operating this handle, and the handle is held on the outer surface of the heat insulation door to keep the heat insulation door closed. A handle holding member (safety member) is attached, and the handle is engaged with the handle holding member to hold the closed state of the heat insulating door (for example, see Patent Document 1).
JP-A-5-141848

  By the way, in this kind of low-temperature storage, when the size of the heat insulation box becomes large, an operator (or a user) enters and exits the storage chamber from the opening and delivers articles. In such a case, if the heat insulating door is closed while the worker is in the storage room, there is a problem that leads to an accident such as suffocation.

  The present invention has been made to solve the conventional technical problems, and provides a low-temperature storage that can safely and reliably escape when an operator is confined in a storage chamber. For the purpose.

The cryogenic chamber of the present invention constitutes a storage chamber in the heat insulation box, and the opening of the storage chamber is closed with a heat insulation door so that it can be opened and closed, and is loaded and delivered on a transportation means, and the battery is driven during the delivery. The storage room is cooled and the emergency escape handle for opening the insulated door from the storage room side, the interior lamp that illuminates the emergency escape handle, and the opening / closing of the insulated door are detected. A door opening / closing detection means; a human body detection means for detecting the presence or absence of a person in the storage room; and a control means for controlling lighting of the interior lamp based on the output of each detection means. When a human body is present in the storage room with the door closed, the interior lamp is turned on for a predetermined time, and when the human body exists in the storage room after the predetermined time has elapsed, The light is turned on.

  The low temperature storage according to the invention of claim 2 is characterized in that in the above invention, the interior lamp is constituted by an LED.

  The low temperature storage of the invention of claim 3 is characterized in that, in each of the above inventions, the control means is capable of changing the time for lighting the internal lamp.

  According to a fourth aspect of the present invention, there is provided a battery for supplying power to the interior lamp at the time of a power failure, and the control means supplies power to the interior lamp from the battery when power supply is cut off. Features.

  The low temperature storage of the invention of claim 5 is characterized in that, in the invention of claim 4, the battery is a chargeable / dischargeable secondary battery.

  According to a sixth aspect of the present invention, there is provided the low-temperature storage according to the fourth or fifth aspect, wherein the control means blinks the interior lamp when the battery voltage drops below a predetermined value.

  In the low temperature storage of the invention of claim 7, the control means in the invention of claim 4, claim 5 or claim 6 is provided with an alarm buzzer, and when the battery voltage falls below a predetermined value, the alarm buzzer is operated. Features.

In the present invention, a storage chamber is formed in the heat insulation box, and the opening of the storage chamber is closed so as to be freely opened and closed by a heat insulating door , and is loaded and delivered on a transportation means. During the delivery, the storage chamber is driven by a battery. In a low-temperature warehouse that is cooled, an emergency escape handle for opening the insulated door from the storage room side, an interior lamp that illuminates the emergency escape handle, and a door open / close detection means for detecting the opening / closing of the insulated door And a human body detection means for detecting the presence or absence of a person in the storage room, and a control means for controlling lighting of the interior lamp based on the output of each detection means, the control means having a heat insulating door closed. If there is a human body in the storage room, the interior light is turned on for a predetermined time, so if the insulated door is closed while a person is in the storage room, it is enough to escape Emergency escape hanger with internal light It can be illuminated Le.

And if a human body exists in the storage room even after the predetermined time has elapsed, the inside lamp is turned on again for a predetermined time, so that the confined person can safely find the emergency escape handle without falling into a panic. Then you can open the insulated door and escape. In addition, by turning on the interior lamp only when a human body is present by the human body detection means, the power consumption due to lighting of the interior lamp is minimized as compared with the case where the interior lamp is turned on each time the insulated door is opened and closed. It will be possible to suppress.

In particular, in the case of a low-temperature warehouse for physical distribution that cools the inside of the storage room by battery driving as in the present invention, the power consumption of the battery for lighting the interior lamp can be minimized, which is extremely effective. .

  Further, by configuring the interior lamp with an LED as in the invention of claim 2, it becomes possible to further reduce power consumption.

  Further, since the control means can change the time during which the interior lamp is lit as in the invention of claim 3, the lighting time can be appropriately set according to the use situation or request by the user. Thus, waste of power consumption can be effectively prevented.

Furthermore, since the battery for supplying power to the interior lamp at the time of a power failure is provided as in the invention of claim 4 and the control means is adapted to supply power to the interior light from the battery when the power supply is cut off, It is possible to light the interior lamp even at times. Thus, in the case of a battery-driven low temperature storage as in the present invention, it is particularly effective when the voltage of the battery is depleted.

  Further, if the battery is a rechargeable secondary battery as in the invention of claim 5, it is not necessary to replace the battery by always charging it.

  Further, when the voltage of the battery drops below a predetermined value, the control means blinks the interior lamp as in the invention of claim 6 or operates the alarm buzzer as in the invention of claim 7, It becomes possible to notify the user that the amount is low, and it is possible to prevent the inconvenience that the interior lamp does not light in the event of a power failure.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a front view of a cryogenic chamber 1 of an embodiment to which the present invention is applied, FIG. 2 is a rear view of the cryogenic chamber 1, FIG. 3 is a longitudinal side view of the cryogenic chamber 1, and FIG. FIG. 5 is an exploded perspective view of the door opening / closing device 30 of the cryogenic chamber 1, FIG. 6 is a diagram of the handle 35 portion of the heat insulating door 5 of the cryogenic chamber 1 viewed from the storage chamber 6, and FIG. Is a vertical side view of the handle 35 portion of the heat insulating door 5 of the low temperature chamber 1, FIG. 8 is a plan sectional view of the heat insulating door 5 in a state where the handle 35 is engaged with the handle holding member 40, and FIG. The plane sectional view of the heat insulation door 5 of the state removed from the member 40 is shown, respectively.

  The cold storage 1 according to the embodiment is mounted on the loading platform of a delivery vehicle (transportation means) such as a truck and is transported to a destination. Further, during transportation, the low-temperature warehouse 1 is configured for cooling the stored goods. It is a low temperature storage.

  The cryogenic chamber 1 is provided with a moving wheel 2 at the bottom, an insulating box 4 having a ceiling wall 4A that is formed with an opening 3 on the front surface and is inclined backward and downward, and the opening 3 can be opened and closed. In the storage room 6 formed by the heat-insulating door 5 to be closed, the cooling device 7 for cooling the storage chamber 6, the blower 8 and the cold storage member 9, and the machine room space M formed below the heat-insulating box 4 The compressor 11 is disposed, and the top wall 4A and a horizontal top plate 12 covering the top wall 4A are formed. The wire fin type condenser 13 and the condenser blower 14 are housed in a substantially triangular shape. Space K. An air intake 15 is formed at the rear of the top plate 12, and an air outlet 16 is formed at the front. The storage chamber 6 has a size that allows an operator to enter and exit the interior and deliver articles.

  The storage chamber 6 is divided into two upper and lower chambers by a partition plate 20, and the upper chamber is an article storage chamber 21 and the lower chamber is a freezing chamber 22. In addition, it is desirable that the partition plate 20 be detachable or disposed so that one end thereof is freely rotatable. The freezing chamber 22 accommodates and arranges a pipe-on-sheet evaporator 7 as a cooling device, a blower 8 and a cold storage agent 9 as a cold storage member. As the blower 8, in this example, the temperature is low at a predetermined distribution center or the like. When the commercial power supply 65 is connected to the cabinet 1, the commercial power supply 65 is driven by the commercial power supply 65 (the AC voltage from the commercial power supply 65 is rectified by the power supply circuit into a direct current and then fed), for delivery. When the low-temperature warehouse 1 is loaded on the loading platform of the delivery vehicle and the commercial power supply 65 is cut off, a direct current blower driven by power supplied from the mounted battery (DC power supply) 60 is used.

  A duct 24 is arranged along the back wall 4E of the heat insulating box 4 and has one end opened to the upper part of the article storage chamber 21 to form the blowout port 23 and the other end to the windward side of the evaporator 7. The article storage chamber 21 and the freezing chamber 22 are communicated with each other by the duct 24 at the rear portion. The article storage chamber 21 and the freezing chamber 22 communicate with each other at the suction port 25 formed in the front portion of the partition plate 20. And the cold air which passed the cool storage agent 9 of the freezing chamber 22 is led to the upper part in the goods storage chamber 21 through the duct 24 from the blower outlet 23, and the cold air circulation path Q which returns to the freezing chamber 22 from the suction inlet 25 is formed. .

  Each of the heat insulating doors 5 is formed by filling a heat insulating material 45 such as polyurethane foam between a metal outer surface material 43 and an inner surface material 44, and a heat insulating box which can be rotated by a hinge 41. It is pivotally supported by the body 4. 30 is provided so as to be rotatable with respect to the heat insulating door 5 and the heat insulating box 4, and is a door opening and closing device for opening and closing the heat insulating door 5, and 31 is formed at the substantially central portion on the left side of the heat insulating door 5. The pressure regulating port is provided in the recessed portion 5 </ b> A and communicates between the outside and the inside of the storage chamber 6.

  The door opening / closing device 30 includes a shaft member 34 that is rotatably provided in the longitudinal direction inside the left side of the heat insulating door 5, a handle mounting plate 38 welded to the shaft member 34, and the handle mounting. Reinforcing plate 32 made of a thick steel plate, which is arranged in parallel with the plate 38 facing each other with a predetermined distance, and is welded and fixed. Bolt 46 and nut are attached to handle mounting plate 38 and reinforcing plate 32. And a handle 35 which is rotatably attached at 47.

  The shaft member 34 is rotatably supported at both ends with respect to the heat insulating box 4, and is a shaft that rotates as a handle when the heat insulating door 5 is opened and closed, and a shaft that is rotated when the handle 35 is rotated. Part 37. The handle mounting plate 38 and the reinforcing plate 32 are fixed to the shaft portion 37 by welding. The shaft portion 37 is rotatably held in the heat insulating door 5.

  The front end of the handle 35 is bifurcated to form an inner side 35A and an outer side 35B on the heat insulating door 5 side, and holes 35C through which mounting bolts 46 are inserted are formed in each side. . On the other hand, the handle attachment plate 38 is also provided with a hole 38A through which the bolt 46 is inserted, and the reinforcing plate 32 is formed with a screw hole (not shown) of a female screw hole into which the bolt 46 is screwed. The handle 35 has an inner side 35A inserted between the handle mounting plate 38 and the reinforcing plate 32 as shown by an arrow in FIG. 5, and the hole 35C is mounted on the handle so that the handle mounting plate 38 is sandwiched between the inner and outer sides 35A and 35B. The holes 38A of the plate 38 and the screw holes of the reinforcing plate 32 are matched, and the bolts 46 are inserted into the holes 38A and 35C from the handle mounting plate 38 side, and further screwed into the screw holes, penetrating through the end portions. With the nut 47 facing the heat insulating door 5 side, the nut 47 is screwed and tightened. The handle 35 is rotatable with respect to the bolt 46, whereby the handle 35 is rotatably attached to both the handle attachment plate 38 and the reinforcing plate 32.

  Reference numeral 40 denotes a metal handle holding member that prohibits the rotation operation of the door opening / closing device 30 in a state in which the opening 3 is closed by the heat insulating door 5, and the handle 35 is engaged as shown in FIG. The first holding part 40A having a shape that opens upward and to the left and right to restrict the movement of the second holding part, and the second holding part that is positioned above the first holding part 40A and prevents the handle 35 held by the first holding part 40A from rotating in the vertical direction. Part 40B. While the handle 35 is engaged and held by the first holding portion 40A, the heat insulating door 5 is maintained in a closed state, but by fixing a key device such as a padlock key in the holes formed in the holding portions 40A and 40B. The rotation operation of the door opening / closing device (actually the handle 35) is prohibited. As a result, the handle 35 held by the handle holding member 40 is not accidentally detached from the first holding portion 40A due to vibration or the like during the transportation of the low temperature storage 1.

  On the other hand, the reinforcing plate 32 has a size larger than the handle mounting plate 38, and the upper portion thereof is positioned in front of the pressure adjusting port 31, and rotates together with the rotation operation of the handle 35, as shown in FIG. As described above, the pressure regulating port 31 of the heat insulating door 5 is closed with the handle 35 engaged with the first holding portion 40A. This prevents cold air leakage while the heat insulating door 5 is closed, and eliminates the need for a special pressure adjustment opening / closing lid.

  Further, when the handle 35 is detached from the first holding portion 40A and rotated forward as shown in FIG. 9 when the heat insulating door 5 is opened, the reinforcing plate 32 is also rotated in conjunction with the pressure opening 31 to open. The air pressure difference between the inside and outside of the chamber 6 is eliminated, and the heat insulating door 5 can be easily opened.

  Furthermore, since the handle 35 is attached to both the handle attachment plate 38 and the reinforcing plate 34 by the bolt 46 and the nut 47 as described above, the impact resistance strength of the handle 35 is remarkably improved. As shown in FIG. Even if another cold storage or the like collides in a state of protruding from the heat insulating door 5, the impact applied to the handle 35 is received by both the handle mounting plate 38 and the reinforcing plate 32. It becomes difficult to deform. Therefore, the heat insulation door 5 can be reliably kept closed by the handle 35 as shown in FIG. In addition, even when an impact is applied to the reinforcing plate 34, the strength of the reinforcing plate 34 itself is high, and the impact is also received by the handle 35 and the handle mounting plate 38 contrary to the above. It is difficult for deformation to occur, thereby preventing cold air leakage from the pressure adjusting port 31.

  Further, since the bolt 46 is screwed into the reinforcing plate 32, the handle 35 can be firmly attached to the shaft member 34 by the double nut effect together with the nut 47, and the handle 35 can be securely dropped due to the looseness of the nut 47. Can be prevented.

  On the other hand, the handle holding member 40 is attached to the heat insulating door 5 by a metal emergency escape handle 42 as a fixture as shown in FIG. In this case, a through hole 48 that penetrates the outer surface material 43, the heat insulating material 45, and the inner surface material 44 is formed in the recess 5A, and a cylindrical hard resin spacer 49 is disposed around the through hole 48. The spacer 49 extends between the outer surface material 43 and the inner surface of the inner surface material 44. That is, the through hole 48 is formed in the spacer 49.

  In addition, a through hole 50 is formed in the first holding portion 40A of the handle holding member 40, and a nut is provided corresponding to the back side of the through hole 50, and is welded and fixed to the rear surface side peripheral portion of the through hole 50. The nut portion 51 is used. A predetermined thread groove is formed in the nut portion 51. On the other hand, the emergency escape handle 42 is composed of a head 42A coated with, for example, a hard resin having a dimension that can be gripped by fingers and easily rotated, and a bolt part 42B protruding from the head 42A. A thread is formed at the tip.

  When the handle holding member 40 is attached to the heat insulating door 5, the net portion 51 is inserted into the through hole 48 from the front surface of the heat insulating door 5, and the tip of the bolt portion 42B of the emergency escape handle 42 is inserted from the storage chamber 6 side. Insert into the through hole 48. At that time, a flat washer 52 and a spring washer 53 are interposed between the emergency escape handle 42 and the heat insulating door 5. Then, the head portion 42A is rotated clockwise, the thread of the bolt portion 42B is detachably screwed into the thread groove of the nut portion 51, fastened to the handle holding member 40, and fixed to the heat insulating door 5 (FIG. 7). State).

  At this time, the handle holding member 40 is configured with a nut portion 51 that enters the heat insulating door 5 from the through hole 48, so that the handle holding member 40 does not protrude forward from the heat insulating door 5 and is used for emergency escape. The screwing allowance with the handle 42 can be increased. Thereby, sufficient fastening force is ensured and the attachment state of the handle holding member 40 can be strengthened. Further, since a spacer 49 is provided around the through-hole 48 and extends between the inner surfaces of the double-sided materials 43 and 44, the double-sided material 43 is provided even if the emergency escape handle 42 and the handle holding member 40 are tightened strongly. , 44 is prevented from inwardly deforming.

  On the right side of the handle holding member 40 attached in this manner, an anti-rotation metal fitting 56 as a rotation prevention unit is attached to the front surface of the heat insulating door 5. The anti-rotation metal fitting 56 abuts over a predetermined range in the vertical direction on the right side surface of the handle holding member 40. Further, the heat insulating box 4 corresponding to the right side of the emergency escape handle 42 when viewed from the storage chamber 6 side is provided with an interior lamp 54 located in the storage chamber 6. The interior lamp 54 is configured by an LED in the embodiment, and lighting is controlled by a control device 80 described later. Note that the interior lamp 54 is not limited to the LED, and any lamp that can illuminate the emergency escape handle 42 may be used, and another lighting fixture such as a fluorescent lamp may be used.

  In addition, a door opening / closing switch (door opening / closing SW) 70 as a door opening / closing detection means for detecting opening / closing of the heat insulating door 5 is attached to the opening edge of the storage chamber 6. A human sensor 72 is provided as a human body detecting means for detecting the presence or absence of a person in 6. The door opening / closing switch 70 may be of any type, such as a mechanical switch or a reed switch, as long as it can detect opening / closing of the door. The human sensor 72 may be any sensor as long as it can detect the presence or absence of a human body in the storage chamber 6. For example, the human sensor 72 may be a person based on a change in the amount of light received by the infrared light receiving unit. You may comprise with the infrared sensor which detects the presence or absence of. Moreover, you may comprise as an electrostatic capacitance sensor which detects the presence or absence of a person based on the change of an electrostatic capacitance.

  The low temperature chamber 1 is provided with a control device 80. The control apparatus 80 of an Example is a control means which manages control of the low-temperature warehouse 1, and rectifies | straightens the alternating voltage supplied from the commercial power source 65 as shown in FIG. , A power supply circuit 82 for supplying the battery 60, the interior lamp 54, and a battery 75 to be described later, and a controller 81 composed of a general-purpose microcomputer.

  The controller 81 of the control device 80 is connected to the door opening / closing switch 70, the human sensor 72, the interior lamp 54, the compressor 11, the blower 8, the battery 60, the time setting unit 74, the battery 75, and the like. Yes. The time setting unit 74 is for setting the time for lighting the interior lamp 54, and by operating the time setting section 74, the time for lighting the interior lamp 54 can be freely changed. . The battery 75 described above is for supplying power to the interior lamp 54 in the event of a power failure (including when the voltage of the battery 60 is depleted). In this embodiment, a rechargeable secondary battery is used. To do. Further, when the commercial power supply 65 is connected to the low-temperature chamber 1, the power supply circuit 82 of the control device 80 is always charged. Further, an alarm device 77 capable of operating a predetermined alarm buzzer is connected to the battery 75.

  When the commercial power supply 65 is connected to the low temperature chamber 1, the control device 80 rectifies the AC voltage of the commercial power supply 65 with the power supply circuit 82 (as a direct current) and charges the battery 60. The interior of the storage chamber 6 is cooled by supplying power to the compressor 11 and the blower 8 and operating them. That is, when the compressor 11 is driven, the refrigerant is sucked into the compressor 11 and compressed. The compressed and high-temperature refrigerant gas radiates heat in the wire fin condenser 13, is throttled by an expansion valve (not shown), and then absorbs heat from the surrounding air and the regenerator 9 and evaporates in the cooler. At this time, the cool air exchanged with the refrigerant from the blower 8 is blown into the storage chamber 6, and the inside of the storage chamber 6 is cooled. Moreover, the cool storage agent 9 is also kept cold by heat exchange with the refrigerant. When the commercial power supply 65 is not connected to the low-temperature chamber 1, the control device 80 supplies power from the battery 60 to the blower device 8 without operating the compressor 11, thereby operating the regenerator 9. The cool air cooled in step 1 is circulated in the storage chamber 6 to cool the storage chamber 6.

  The control device 80 controls lighting of the interior lamp 54 based on the opening / closing of the heat insulating door 5 detected by the door opening / closing switch 70 and the presence / absence of a person detected by the human sensor 72. That is, when the control device 80 detects that a human body is present in the storage chamber 6 by the human sensor 72 in a state where the heat insulating door 5 is closed by the detection of the door opening / closing switch 70, the interior lamp 54 is used. Is turned on for a predetermined time to illuminate the interior of the storage room 6 with the emergency escape handle 42 as the center.

  Further, when the commercial power source 65 is connected to the low temperature chamber 1, the control device 80 supplies power to the interior lamp 54 from the power circuit 82, and when the commercial power source 65 is cut off, the battery 60 is supplied. To supply power to the interior lamp 54. In the present embodiment, when the power supply from the commercial power supply 65 is cut off, the control device 80 supplies power to the interior lamp 54 from the battery 60, and the voltage of the battery 60 is a predetermined value (including zero). When the power supply from the battery 60 is cut off, the voltage detection device 78 (to be described later) performs control for supplying power from the battery 75 to the interior lamp 54.

  That is, a voltage detection device 78 independent of the control device 80 is connected to the battery 75, and the voltage of the battery 75 is detected by the voltage detection device 78. And the voltage detection apparatus 78 performs control which supplies electric power from the battery 75 to the interior lamp 54, when the power supply from the battery 60 to the interior lamp 54 is cut off. Further, when the voltage of the battery 75 falls below a predetermined value, the voltage detection device 78 performs control to cause the interior lamp 54 to blink by the battery 75 and to operate the alarm buzzer of the alarm device 77.

  With the above configuration, in the unlikely event that an operator is confined in the storage chamber 6, that is, in a state where the operator is in the storage chamber 6, the heat insulating door 5 is closed, and the handle 35 as shown in FIG. The operation of the control device 80 when it is engaged with the first holding portion 40A of the holding member 40 will be described with reference to FIG. FIG. 11 is a flowchart of the control operation of the control device 80. In this embodiment, the infrared sensor or the electrostatic sensor is used as the human sensor 72.

  First, when the heat insulating door 5 is closed and a predetermined door closing signal is input from the door opening / closing switch 70 to the control device 80, the controller 81 of the control device 80 proceeds to step S1 and starts control based on the human sensor 72. To do. The controller 81 of the control device 80 monitors the sensor change amount in step S1, proceeds to step S2, and receives the received light amount (in the case of using an infrared sensor) detected by the human sensor 72, or the capacitance ( If there is no change in the electrostatic sensor), it is determined that there is no human body in the storage chamber 6, and the process returns to step S1, and thereafter, the received light amount (infrared ray) detected by the human sensor 72 Sensor) or capacitance (electrostatic sensor) changes, or steps S1 and S2 are repeated until a predetermined door opening signal is input from the door opening / closing switch 70 to the controller 81 of the control device 80. .

  On the other hand, if there is a change in the amount of received light detected by the human sensor 72 or the capacitance in step S2, the controller 81 of the control device 80 determines that a human body is present in the storage chamber 6. After determining and turning on the internal lamp 54 in step S3, time counting is started in step S4.

  Here, when the commercial power source 65 is connected to the low-temperature chamber 1, the controller 81 of the control device 80 supplies power to the interior lamp 54 from the power circuit 82 as described above in step S 3, and When 65 is not connected, power is supplied from the battery 60 to the interior lamp 54.

  Further, when the controller 81 of the control device 80 starts counting time in step S4, the process proceeds to step S5. If the time (elapsed time) that has elapsed since the start of counting has not reached the set time T set in advance by the time setting unit 74, step S5 is repeated until the set time T is reached.

  On the other hand, when the time elapsed since the start of counting is equal to or longer than the set time T, the controller 81 of the control device 80 proceeds to step S6 and turns off the interior lamp 54 (OFF). Thereafter, the controller 81 of the control device 80 proceeds to step S7, resets the time count, and returns to step S1.

  Further, the controller 81 of the control device 80 monitors the sensor change amount in step S1 and proceeds to step S2, and when there is a change in the received light amount detected by the human sensor 72 or the capacitance. The process proceeds to step S3, and the control operation described above is repeated thereafter.

  As described above, when the presence of a human body is detected in the storage room 6 by the human sensor 72, the interior lamp 54 is lit for a predetermined time, so that the operator is confined in the storage room 6. Even so, the operator who is confined can easily confirm the position of the emergency escape handle 42.

  Then, by rotating the emergency escape handle 42 counterclockwise, the screw engagement between the nut portion 51 and the bolt portion 42B is loosened, and eventually the handle holding member 40 is detached from the heat insulating door 5. As a result, the holding of the handle 35 is released and the handle 35 can be rotated as shown in FIG. 9, so that the heat insulating door 5 can be opened and the operator can escape. In this case, since the anti-rotation metal fitting 56 that prevents the rotation of the handle holding member 40 is attached to the heat insulating door 5, the handle holding member 40 rotates together when turning the emergency escape handle 42 (clockwise as viewed from the front). The handle holding member 40 can be easily removed.

  In addition, even when the set time T elapses during the operation of the emergency escape handle 42 and the interior lamp 54 is turned off, there is a human body in the storage chamber 6 with the heat insulating door 5 closed. The controller 80 again turns on the interior lamp 54 for the set time T, so that a person who is trapped can safely find the emergency escape handle 42, open the heat insulating door 5 and escape without panicking. Will be able to.

  Further, by turning on the interior lamp 54 only when the human body is present in the storage chamber 6 by the human sensor 72, for example, when the interior lamp 54 is lit for a predetermined time after the heat insulating door 5 is closed. As compared with the above, power consumption due to lighting of the interior lamp 54 can be suppressed. In particular, when the cool air circulation in the storage chamber 6 is performed by driving the battery 60 in a state where the commercial power supply 65 is not connected, the power consumption of the battery 60 for lighting the interior lamp 54 is minimized. Will be able to.

  Moreover, the power consumption of the battery 60 can be further suppressed by configuring the interior lamp 54 with an LED as in this embodiment. Furthermore, since the lighting time of the interior lamp 54 can be freely changed by the time setting unit 74 as required by the user, waste of power consumption can be prevented.

  Further, when the interior lamp 54 is turned on by power supply from the battery 60 in a state where the commercial power source 65 is not connected, when the power storage amount of the battery 60 is insufficient and the power supply from the battery 60 is cut off, The voltage detector 78 is turned on by supplying power from the battery 75 to the interior lamp 54.

  At this time, when the voltage of the battery 75 falls below a predetermined value, the voltage detection device 78 causes the interior lamp 54 to blink by the battery 75 and operates the alarm buzzer of the alarm device 77. Thus, when the power supply from the battery 60 is cut off, the voltage detector 78 supplies power to the interior lamp 54 with the battery 75, thereby avoiding the inconvenience that the interior lamp 54 does not light. become able to. Further, when the voltage of the battery 75 is lowered from a predetermined value by the voltage detection device 78, the interior lamp 54 is blinked and the alarm buzzer is operated by the alarm device 77, whereby the remaining amount of the battery 75 is reduced. It is possible to prompt the user to charge the battery 75. As a result, it is possible to reliably prevent the inconvenience that the interior lamp 54 does not light and to improve the reliability of the low temperature chamber 1.

  In addition to the embodiment, the battery 75 may be a primary battery such as a normal dry battery. However, if the battery 75 is a secondary battery that can be charged and discharged as in this embodiment, the commercial power supply 65 is provided in the low-temperature chamber 1. By always charging when is connected, there is no need to replace the battery.

  As described above in detail, according to the present invention, even if an operator is confined in the storage chamber 6, the interior lamp 54 is reliably turned on for a sufficient time to escape, and the emergency escape handle 42 is provided. Can be illuminated, so that a confined worker can escape safely and reliably without falling into a panic.

In the present embodiment, when the commercial power source 65 is not connected, the control device 80 supplies power to the interior lamp 54 with the battery 60, and the battery 60 has a shortage of power storage. However, when the commercial power supply 65 is not connected, the battery 60 does not supply power to the interior light 54 when the power supply of the battery is cut off. In addition, the battery 75 may supply power to the interior lamp 54. Also in this case, when the power supply from the commercial power supply 65 is cut off during a power failure or the like, the interior lamp 54 can be turned on by the battery 75 .

It is a front view of the low temperature store | warehouse | chamber of the Example to which this invention is applied. It is a rear view of the low temperature store | warehouse | chamber of FIG. It is a vertical side view of the low-temperature warehouse of FIG. It is a perspective view of the handle | steering-wheel part of the door opening / closing apparatus of the low-temperature warehouse of FIG. It is a disassembled perspective view of the door opening / closing apparatus of the low-temperature warehouse of FIG. It is the figure which looked at the handle | steering-wheel part of the heat insulation door of the low-temperature warehouse of FIG. 1 from the storage room side. It is a vertical side view of the handle | steering-wheel part of the heat insulation door of the low-temperature warehouse of FIG. It is a plane sectional view of the heat insulation door of the low-temperature warehouse of Drawing 1 in the state where the handle was engaged with the handle holding member. It is a plane sectional view of the heat insulation door of the low-temperature warehouse of Drawing 1 in the state where a handle was removed from a handle holding member. It is a control block diagram of the control apparatus of the low-temperature warehouse of FIG. It is a flowchart of control operation | movement of the control apparatus of the low-temperature warehouse of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Low-temperature storage 4 Heat insulation box 5 Heat insulation door 6 Storage room 30 Door opening / closing device 35 Handle 40 Handle holding member 42 Emergency escape handle (attachment tool)
48 Through hole 49 Spacer 51 Nut part 54 Interior light 56 Anti-rotation bracket (Rotation prevention part)
60 battery 70 door open / close switch (door open / close detection means)
72 Human sensor (human body detection means)
74 Time setting section 75 Battery (secondary battery)
77 Alarm device 80 Control device (control means)
81 controller

Claims (7)

A storage chamber is formed in the heat insulation box, and the opening of the storage chamber is closed with a heat insulating door so that the storage chamber can be freely opened and closed. The storage chamber is loaded and delivered on a transportation means. During the delivery, the storage chamber is cooled by a battery. In the low temperature storage
An emergency escape handle for opening the heat insulation door from the storage chamber side;
An interior lamp that illuminates the emergency escape handle;
Door opening and closing detection means for detecting opening and closing of the heat insulating door;
Human body detecting means for detecting the presence or absence of a person in the storage room;
Control means for controlling the lighting of the interior lamp based on the output of each detection means,
The control means turns on the interior lamp for a predetermined time when a human body exists in the storage room with the heat insulating door closed, and the human body remains in the storage room after the predetermined time has elapsed. When present , the low-temperature storage is characterized by turning on the interior lamp again for a predetermined time .   2. The low temperature storage according to claim 1, wherein the internal lamp is constituted by an LED.   The low temperature storage according to claim 1 or 2, wherein the control means is capable of changing a time for turning on the interior lamp.   The battery for supplying electric power to the said interior lamp at the time of a power failure is provided, and the said control means supplies electric power to the said interior lamp from the said battery, when a power supply is interrupted | blocked. Or the low-temperature warehouse of Claim 3.   The low temperature storage according to claim 4, wherein the battery is a chargeable / dischargeable secondary battery.   The low temperature storage according to claim 4 or 5, wherein the control means blinks the internal lamp when the voltage of the battery drops below a predetermined value.   The said control means is provided with the alarm buzzer, and when the voltage of the said battery falls from a predetermined value, the said alarm buzzer is operated, The low temperature store | warehouse | chamber of Claim 4, 5, or 6 characterized by the above-mentioned.

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