JP2014081134A - Freezing car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a freezing car capable of preventing engine start from being hindered by operation of an air curtain device.SOLUTION: A freezing car 100 includes: a freezer 20 provided at a vehicle body 10; a cooling unit 30 which cools the interior of the freezer 20; an opening/closing door 24 provided at the freezer 20; an air curtain device 40 for blowing out air to an area in the freezer 20 which is located near the opening/closing door 24; a battery 14 which supplies electric power to the air curtain device 40; and a freezer side control part 51 which performs control for changing the operation time of the air curtain device 40 according to a remaining amount of the battery 14 (specific gravity of an electrolytic solution).

Description

  The present invention relates to a refrigeration vehicle, and more particularly to a refrigeration vehicle including an air curtain device and a battery that supplies electric power to the air curtain device.

  2. Description of the Related Art Conventionally, a refrigerator car that includes an air curtain device and a battery that supplies power to the air curtain device is known (see, for example, Patent Document 1).

  In Patent Document 1, a refrigerator (storage) in which a load is kept cool by a cooling unit, a blower (air curtain device) that blows air to an opening of the freezer to form an air curtain, and supplies power to the blower A refrigerating vehicle including an in-vehicle battery and a control device is disclosed. The refrigerator described in Patent Document 1 is configured such that the air blower is operated by the control device for a certain period after the opening / closing door is opened, and an air curtain is formed at the opening of the freezer.

Japanese Patent No. 4412750

  However, since the blower (air curtain device) is operated for a certain period after the opening / closing door is opened in the refrigeration vehicle described in Patent Document 1, the blower is operated for a certain period under the condition that the remaining amount of the in-vehicle battery is originally low. If this is done, there is a disadvantage that the remaining battery level is too low. In such a case, there is a problem that the engine cannot be started by the power of the battery when the refrigeration vehicle starts after the cargo handling operation.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to suppress the inability to start the engine due to the operation of the air curtain device. It is to provide a freezing vehicle that can be used.

  A refrigerator truck according to one aspect of the present invention includes a storage provided in a vehicle, a cooling unit that cools the inside of the storage, an opening / closing door provided in the storage, and an opening / closing door inside the storage. An air curtain device that blows out air, a battery that supplies power to the air curtain device, and a control unit that performs control to change the operation time of the air curtain device according to the remaining amount of the battery. Note that “freezing” in the present invention is not only when the interior of the storage is cooled (freeze) to 0 ° C. or lower, but also when the interior of the storage is cooled (refrigerated) to a temperature range slightly higher than 0 ° C. Is a broad concept.

  In the refrigeration vehicle according to one aspect of the present invention, as described above, based on the remaining amount of the battery, the control unit performs control for changing the operation time of the air curtain device according to the remaining amount of the battery. Since the operation time (operation stop timing) of the air curtain device is appropriately changed (adjusted), it is possible to suppress the remaining amount of the battery from being excessively reduced due to the operation of the air curtain device. As a result, it is possible to prevent the engine of the vehicle (refrigerated vehicle) from being activated due to the operation of the air curtain device.

  In the refrigeration vehicle according to the aforementioned aspect, preferably, the control means stops the operation of the air curtain device based on the fact that the remaining amount of the battery becomes equal to or lower than the first threshold value after the operation of the air curtain device is started. It is configured to perform control. If comprised in this way, since the operation | movement of an air curtain apparatus will be stopped when the residual amount of a battery will be below a 1st threshold value (1st threshold value) after the driving | operation start of an air curtain apparatus, It can suppress that the remaining amount of a battery falls below the 1st threshold value. As a result, it is possible to easily suppress the remaining amount of the battery from being excessively reduced due to the operation of the air curtain device, so that the engine of the vehicle (refrigerated vehicle) is started due to the operation of the air curtain device. It can be easily suppressed that it becomes impossible.

  In this case, preferably, the first threshold value has a magnitude equal to or larger than the remaining battery level required for starting the engine of the vehicle. With this configuration, even if the air curtain device is operated using a battery, the remaining amount of the battery exceeding the amount necessary for starting the engine is ensured. The engine can be reliably started at the time of departure of the vehicle.

  In the refrigeration vehicle according to the above aspect, preferably, the control means does not start the operation of the air curtain device when the remaining amount of the battery is equal to or less than the second threshold value at the start of the operation of the air curtain device. It is configured to perform control. If configured in this way, the operation of the air curtain device is not started when the remaining amount of the battery is already equal to or less than the second threshold before the air curtain device is operated. Further, the remaining amount can be prevented from further decreasing. This can also prevent the remaining amount of the battery from being lowered too much, so that it is possible to prevent the engine from being started.

  In the refrigerator according to the above aspect, the control unit preferably detects the remaining amount of the battery based on the specific gravity of the battery electrolyte, and changes the operation time of the air curtain device according to the specific gravity of the battery electrolyte. It is configured to perform control. According to this configuration, the remaining amount of the battery is accurately reflected in the specific gravity of the electrolytic solution of the battery, so that the remaining amount of the battery can be accurately detected based on the specific gravity of the electrolytic solution. As a result, the operation time (operation stop timing) of the air curtain device can be accurately changed (adjusted) according to the remaining amount of battery (electrolyte specific gravity) accurately detected. Due to this, it is possible to more accurately suppress the remaining amount of the battery from dropping below the remaining amount necessary for starting the engine.

  In this case, preferably, the control means detects the remaining amount of the battery based on the specific gravity of the battery electrolyte at least during the ON operation of the air curtain device, and determines the specific gravity of the battery electrolyte during the ON operation of the air curtain device. Accordingly, control is performed to change the operation time of the air curtain device. In this way, the remaining amount of battery during operation of the air curtain device is accurately detected in real time by detecting the remaining amount of battery (specific gravity of the electrolyte) while the air curtain device is on (during operation). Therefore, it is possible to adjust the operation time (operation stop timing) of the air curtain device while detecting the remaining amount of the battery (electrolyte specific gravity) in real time. It is possible to perform operation stop control of the curtain device.

  In the refrigeration vehicle according to the above aspect, the control unit preferably detects the remaining amount of the battery based on the voltage value of the battery and performs control to change the operation time of the air curtain device in accordance with the voltage value of the battery. It is configured as follows. With this configuration, the voltage value of the battery varies depending on the remaining battery level, so that the remaining battery level can be easily detected based on the voltage value of the battery. As a result, the operation time (operation stop timing) of the air curtain device can be easily changed (adjusted) according to the detected remaining battery level (voltage value). It can be easily suppressed that the remaining amount of the battery falls below the remaining amount necessary for starting the engine.

  In this case, preferably, the control means detects the voltage value of the battery when the air curtain device is turned on or the voltage value of the battery when the vehicle engine is turned off, and the air curtain according to the voltage value of the battery. It is comprised so that control which changes the operation time of an apparatus may be performed. Here, when the engine is on, power for charging is supplied from the alternator (power generation device) to the battery, so that the voltage of the battery shows a substantially constant value regardless of the remaining amount of the battery. On the other hand, when the engine is off, power is not supplied from the alternator to the battery, and the battery voltage tends to decrease as the remaining battery level decreases. In addition, since air curtain devices are often driven by battery power while the engine is stopped after the vehicle is stopped, when the air curtain device is in operation (when it is on), The battery voltage is low. Therefore, as described above, the remaining battery level can be easily detected by detecting the voltage value of the battery when the air curtain device is on (during operation) or when the engine is off (when the engine is stopped). Therefore, the operation time of the air curtain device can be easily adjusted according to the detected remaining battery level (voltage value). In addition, when the remaining amount of battery (voltage value) is detected when the air curtain device is on (during operation), the remaining amount of battery during operation of the air curtain device can be detected in real time. It is possible to adjust the operation time (operation stop timing) of the air curtain device while detecting the remaining amount (voltage value) of the air curtain in real time. it can.

  In the refrigeration vehicle according to the above aspect, preferably, the control means detects the remaining amount of the battery based on the voltage change amount of the battery, and controls to change the operation time of the air curtain device according to the voltage change amount of the battery. Is configured to do. With this configuration, the amount of battery voltage change (voltage drop) increases as the remaining battery level decreases, so the remaining battery level can be easily detected by the amount of voltage change (voltage drop) when using the battery. can do. As a result, the operation time (operation stop timing) of the air curtain device can be easily changed (adjusted) according to the detected remaining battery level (voltage change amount). Thus, it is possible to easily suppress the remaining amount of the battery from dropping below the remaining amount necessary for starting the engine.

  In this case, preferably, the control means, as the voltage change amount corresponding to the remaining amount of the battery, the battery voltage change amount when the air curtain device is switched from off to on, or the engine from on to off. The remaining amount of the battery is detected based on the voltage change amount of the battery at the time of switching to the hour, and control is performed to change the operation time of the air curtain device according to the battery voltage change amount. As described above, the battery voltage change amount when the air curtain device is switched from the off time to the on time or the battery voltage change amount when the engine is switched from the on time to the off time is easily used. The remaining amount of battery can be detected, so the operation time of the air curtain device can be changed according to the detected remaining amount of battery (voltage change amount). This can be easily suppressed.

  In the configuration in which the control unit detects the remaining amount of the battery based on the amount of change in the voltage of the battery, preferably, the control unit detects the remaining amount of the battery based on the amount of change in the battery voltage during the ON operation of the air curtain device, Control is performed to change the operation time of the air curtain device in accordance with the voltage change amount of the battery. With this configuration, the smaller the remaining amount of the battery, the larger the voltage change amount (voltage drop amount) of the battery during the ON operation of the air curtain device. Therefore, the battery during the ON operation of such an air curtain device. By detecting the voltage change amount (voltage drop amount), it is possible to detect the remaining amount of the battery during the on-operation of the air curtain device in real time. As a result, the operation time (operation stop timing) of the air curtain device can be adjusted while detecting the remaining amount (voltage change amount) of the battery in real time, so that the operation control of the air curtain device is performed more appropriately. be able to.

  Preferably, the refrigerator according to the above aspect further includes a remaining amount detecting unit that detects the remaining amount of the battery in a plurality of stages, and the control unit is configured to reduce the remaining amount of the battery detected by the remaining amount detecting unit. Accordingly, control is performed to shorten the operation time of the air curtain device step by step. If comprised in this way, it is not necessary to always detect the remaining amount of the battery by the control means, and the remaining amount of the battery is determined in a plurality of stages only once, for example, immediately before the start of the operation of the air curtain device (timing when the opening / closing door is opened). It is only necessary to detect which of the remaining amount is. Thereby, since the operation control of an air curtain apparatus can be simplified, the control load of a control means can be reduced by that much.

  According to the present invention, as described above, it is possible to suppress the inability to start the engine of the vehicle (refrigerated vehicle) due to the operation of the air curtain device.

It is the figure which showed the schematic whole structure of the freezing vehicle by 1st Embodiment of this invention. It is the perspective view which showed a mode that the open / close door of a freezer was opened in order to perform the cargo handling operation | work of goods in the state which the freezing vehicle by 1st Embodiment of this invention stopped (parking). It is a control block diagram of the freezing vehicle by 1st Embodiment of this invention. It is a figure for demonstrating the operation control of the air curtain apparatus based on the specific gravity of the electrolyte solution of the battery in the freezing vehicle by 1st Embodiment of this invention. It is the figure which showed the control processing flow of the freezer side control part regarding the driving | operation operation | movement of the air curtain apparatus in the freezing vehicle by 1st Embodiment of this invention. It is a control block diagram of the freezing vehicle by 2nd Embodiment of this invention. It is a figure for demonstrating the operation control of the air curtain apparatus based on the voltage value of the battery in the freezing vehicle by 2nd Embodiment of this invention. It is the figure which showed the control processing flow of the freezer side control part regarding the driving | operation operation | movement of the air curtain apparatus in the freezing vehicle by 2nd Embodiment of this invention. It is a figure for demonstrating an example of the operation control of the air curtain apparatus based on the voltage variation of the battery in the freezing vehicle by 3rd Embodiment of this invention. It is a figure for demonstrating the other example of the operation control of the air curtain apparatus based on the voltage variation of the battery in the freezing vehicle by 3rd Embodiment of this invention. It is the figure which showed the control processing flow of the freezer side control part regarding the driving | operation operation | movement of the air curtain apparatus in the freezing vehicle by 3rd Embodiment of this invention. The table used for the control in which the remaining amount of the battery is detected in a plurality of stages (plural levels) and the operation duration time of the air curtain device is adjusted in a plurality of stages in the refrigerator according to the modification of the first embodiment of the present invention is shown. FIG. It is a figure for demonstrating the operation control of the air curtain apparatus based on the capacity | capacitance of the battery in the modification of the 1st-3rd embodiment of this invention.

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

(First embodiment)
First, with reference to FIGS. 1-4, the structure of the freezing vehicle 100 by 1st Embodiment of this invention is demonstrated. The freezer 100 according to the first embodiment, for example, transports frozen foods that need to be maintained at a low temperature of around −20 ° C. during transportation and fresh foods that require temperature control in the range of about −5 ° C. to 0 ° C. (Chilled) A commercial vehicle capable of switching between transporting foods and transporting refrigerated foods including milk drinks that require temperature control around + 5 ° C.

  As shown in FIG. 1, the refrigerator vehicle 100 according to the first embodiment of the present invention includes a vehicle main body 10, a freezer (freezer refrigerator compartment) 20, a cooling unit 30 that cools the inside of the freezer 20 to a desired temperature, And an air curtain device 40 installed inside the freezer 20. The vehicle body 10 is an example of the “vehicle” in the present invention, and the freezer 20 is an example of the “storage” in the present invention.

  The vehicle body 10 includes a chassis 11 that extends in the front-rear direction (X direction). A traveling engine 12 (shown by a broken line) is attached to the front side (X1 side) of the chassis 11 and covers the engine 12. A cab 13 is provided. In addition, a lead storage battery 14 is mounted on the vehicle body 10 on the side (Y1 side) of the chassis 11 at the substantially central portion in the X direction. Here, the power of the battery 14 is supplied to a starter (cell motor) (not shown) when the engine 12 is started. Further, the electric power of the battery 14 is configured to be supplied to the blower 42 when the air curtain device 40 is operated after the engine 12 is turned off together with the stop of the refrigerator car 100. The engine 12 is provided with an alternator (power generation device) 12a. The refrigerator 100 is configured such that the electric power generated by the alternator 12a using the driving force of the engine 12 is supplied to various electrical components (not shown) provided in the vehicle main body 10 during traveling. . The electric power from the alternator 12a is also supplied to the battery 14 during traveling to charge the battery 14.

  Here, in the first embodiment, a specific gravity sensor 15 configured to be able to measure the specific gravity of the electrolytic solution is attached to the battery 14. The specific gravity sensor 15 is electrically connected to the control box 50 (see FIG. 3), and is configured such that an electric signal corresponding to the measured specific gravity of the electrolyte is output from the specific gravity sensor 15. Thus, the remaining amount of the battery 14 is detected (obtained) from the specific gravity value of the electrolyte measured using the specific gravity sensor 15. Since the capacity directly indicating the remaining amount of the battery 14 is accurately reflected in the specific gravity of the electrolytic solution, it is possible to accurately detect the remaining amount of the battery 14 by measuring the specific gravity of the electrolytic solution. is there.

  Further, as shown in FIG. 1, the freezer 20 is mounted on the chassis 11 at the rear (X2 side) of the cab 13. In addition, a control box 50 for performing operation control of the air curtain device 40 is installed in the vehicle main body 10 of the refrigerator car 100. The control box 50 is installed in the vehicle body 10 as a control device configured separately from the vehicle body side control unit (ECU) 12b that controls the engine 12 on the vehicle body 10 side.

  An engine switch sensor 71 is provided around the driver's seat 13 a in the cab 13. The engine switch sensor 71 has a function of detecting a turning state of an ignition key (not shown) inserted into a predetermined position when starting / stopping the engine 12. Here, when the ignition key is rotated to the engine start position, an ON signal is output from the engine switch sensor 71, and when the ignition key is returned to the engine stop position, an OFF signal is output. Yes. The engine switch sensor 71 is electrically connected to the control box 50 (see FIG. 3).

  As shown in FIGS. 1 and 2, the freezer 20 has a side wall portion 21 that is substantially perpendicular to the road surface 1, a floor portion 22 and a ceiling portion 23 that are substantially parallel to the road surface 1, and outward toward the rear side. It is constituted by a double-opening type openable door 24 that can be opened and closed. The side wall part 21, the floor part 22, the ceiling part 23, and the opening / closing door 24 use members having a heat insulating function, and each member is assembled to a metal frame part (frame) 20a (see FIG. 2). As a result, a generally hollow box-type freezer 20 is formed.

  Further, as shown in FIG. 1, a freezer temperature sensor 81 for detecting the air temperature in the refrigerator is attached in the vicinity of the ceiling portion 23 of the freezer 20. The freezer temperature sensor 81 is electrically connected to the control box 50 (see FIG. 3).

  As shown in FIG. 2, when the refrigerator truck 100 is viewed from the rear side (X2 side), the double-opening type opening / closing door 24 includes a first door 24 a and a second door 24 b. Thereby, while the 1st door 24a is opened to the one side (Y1 side) from the approximate center part of the freezer 20 in the vehicle width direction (Y direction), the second door 24b is opened to the other side (Y2 side). It is configured. Here, each of the first door 24a and the second door 24b has a hinge 24c and a hinge 24d at three locations, respectively. The hinge 24c and the hinge 24d are arranged on the left and right sides (Y1 side and Y2 side) side wall portions 21 are respectively fixed. Therefore, the driver 2 (loading worker) opens the open / close door 24 in a state where the freezer 100 is stopped (parked) at a predetermined place (the first door 24a is opened in FIG. 2), thereby the freezer 20 It is configured so that an operation for loading an article such as frozen food and an unloading operation from the freezer 20 can be performed. The first door 24a and the second door 24b are examples of the “opening / closing door” of the present invention.

  In addition, an open / close door switch 72 is attached to the surface of the frame body portion 20a at a position corresponding to the lower end (Z1 side) of each of the first door 24a and the second door 24b. The pair of opening / closing door switches 72 is electrically connected to the control box 50 (see FIG. 3). The open / close door switch 72 has a function of detecting the door open state and the door closed state of the open / close door 24 (the first door 24a and the second door 24b) by the driver 2. Specifically, when the door 24 is closed, an ON signal (closed state) is output from the door switch 72, and when the door 24 is opened, an OFF signal (open state) is output from the door switch 72. ) Is output.

  As shown in FIG. 2, each of the first door 24 a and the second door 24 b has an open / close door lock mechanism 25. Here, the second door 24b (Y2 side) will be described as an example. The open / close door lock mechanism 25 has a single rotating shaft 26 extending in the vertical direction (Z direction) along the outer surface of the second door 24b. And an opening / closing door operation lever 27 for rotating the rotation shaft 26, and a holding bracket 28 for holding the opening / closing door operation lever 27 at a substantially horizontal position along the outer surface of the second door 24b. Yes. Note that the holding state by the holding bracket 28 is released by slightly rotating the door operating lever 27 upward (Z2 direction) from the horizontal position, and the door operating lever 27 is returned to the horizontal position. The rotating shaft 26 is configured to rotate by rotating to the near side. Further, an engaging claw 26 a that is rotated together with the rotation of the rotation shaft 26 is attached to the upper end portion (Z2 side) and the lower end portion (Z1 side) of the rotation shaft 26. Further, a lock member that can be engaged with the surface of the frame body portion 20a at a position corresponding to each of the upper end portion and the lower end portion of the rotating shaft 26 by receiving the engaging claw 26a together with the rotation of the engaging claw 26a. 26b is attached.

  Therefore, when the driver 2 opens the first door 24a on the Y1 side during the cargo handling operation, the driver 2 moves the opening / closing door operating lever 27 on the first door 24a side backward from the locked state of the first door 24a. The engaging claw 26a is rotated in the direction of the arrow U2 by rotating the rotating shaft 26 counterclockwise by rotating it counterclockwise (in the direction of the arrow U2) to the side (X2 direction), and the locking member 26b. The engagement state of the engagement claw 26a with respect to is released. In this state, the first door 24a is opened to the outside (turned clockwise) by pulling out the opening / closing door operating lever 27 in the X2 direction. On the contrary, when closing the first door 24a, the first door 24a is pressed against the portion of the frame body portion 20a corresponding to the edge of the opening portion 20b, and the door operating lever 27 is moved forward. The pair of upper and lower engaging claws 26a are rotated in the direction of the arrow U1 by rotating the rotating shaft 26 in the clockwise direction (the direction of the arrow U1) to the side (X1 direction). Engage with the corresponding locking member 26b. Thereby, the closed state of the first door 24a is configured to be locked. The second door 24b side is configured in the same manner, and the driver 2 performs a rotation operation on the rotation shaft 26 opposite to the first door 24a side to the second door 24b. The door 24b can be opened and closed.

  Further, as shown in FIG. 1, the cooling unit 30 includes a compressor 31, a condenser 32, an evaporator 33, and a refrigerant piping system 34 that connects these functional components. The compressor 31 is installed in the vicinity of the engine 12 and is driven by the power of the engine 12 via an electromagnetic clutch (not shown). The condenser 32 and the evaporator 33 are housed in a resin or metal casing 35. The casing 35 is above the cab 13 and faces the cab 13 in the X direction. It is attached to the outer surface of the side wall part 21 of. In addition, a blow hole 21a made of a through hole and a suction hole 21b made of a through hole are formed in the side wall portion 21 corresponding to the position where the evaporator 33 is disposed. Then, the air in the freezer 20 is sucked into the evaporator 33 side from the suction hole 21b by the blower 33a attached to the evaporator 33, and the air cooled by the evaporator 33 is blown into the freezer 20 from the blowout hole 21a. It is comprised so that. In addition, air outside the vehicle is sucked in from the front side (X1 side) by a blower 32a attached to the condenser 32, and the air that has cooled the condenser 32 is blown out upward (Z2 direction). .

  Here, the function of the cooling unit 30 will be briefly described. The refrigerant gas discharged from the compressor 31 flows through the refrigerant piping system 34 and is condensed (liquefied) by the condenser 32, and the liquefied refrigerant is not shown. The pressure is reduced by a pressure reducing device (expansion valve) and the temperature is reduced to flow through the evaporator 33. The evaporator 33 is configured such that the inside of the freezer 20 is cooled to a desired temperature by cooling the air in the freezer 20 as the low-temperature refrigerant evaporates.

  As shown in FIG. 1, the air curtain device 40 includes a box-shaped housing 41 having a flat outer shape and an electric blower 42 installed inside the housing 41. The air curtain device 40 is attached to the ceiling portion 23 in the vicinity of the open / close door 24 inside the freezer 20. Moreover, as shown in FIG. 2, the housing | casing 41 is extended from the side wall part 21 of the one side (Y1 side) in the freezer 20 to the side wall part 21 of the other side (Y2 side) along the lower surface 23a of the ceiling part 23. It is installed as follows. Further, as shown in FIG. 1, a blower outlet 41 b extending along the Y direction (direction perpendicular to the paper surface) is formed on the lower surface 41 a of the housing 41. A suction port 41d is formed in the side surface 41c on the X1 side of the housing 41. When the blower 42 is operated, air (cold air) in the freezer 20 is sucked into the housing 41 from the suction port 41d of the housing 41 and downward (Z1 direction) from the air outlet 41b of the housing 41. It is configured to be blown out. As a result, when the air curtain device 40 is operated, an airflow (downward airflow for the air curtain) blown down from the ceiling portion 23 toward the floor portion 22 in the region near the opening 20b after the opening / closing door 24 is opened. P) is formed. In addition to the descending airflow P, an air circulation flow Q (circulation) is formed in the freezer 20. Thereby, the cold air flowing as the circulation flow Q inside the freezer 20 is hardly leaked to the outside, so that the warm outside air is hardly drawn into the freezer 20.

  Moreover, as a control structure of the refrigerator car 100, as shown in FIG. 3, the control box 50 is connected to the blower 42 of the air curtain device 40 so as to be controllable. The control box 50 is configured such that signals from the engine switch sensor 71, the open / close door switch 72, and the freezer temperature sensor 81 are individually input. In the control box 50, at least a freezer side control unit (CPU) 51, a ROM 52, and a RAM 53 are provided. The control box 50 is configured to perform a predetermined determination based on input signals from the specific gravity sensor 15 and the open / close door switch 72 and to control the air blower 42 of the air curtain device 40 appropriately. Further, the ROM 52 stores an operation control program for the air curtain device 40 executed by the freezer control unit 51. The RAM 53 is used as a working memory that temporarily stores control parameters (such as remaining battery level detection data) used when the operation control program for the air curtain device 40 is executed. The freezer side control unit 51 is an example of the “control unit” in the present invention.

  Here, in the first embodiment, the operation time of the air curtain device 40 is changed (adjusted) according to the remaining amount of the battery 14 based on the command of the freezer control unit 51 provided in the control box 50. It is configured. Specifically, the specific gravity of the electrolyte solution of the battery 14 is measured by the specific gravity sensor 15 for each control cycle of the freezer side control unit (CPU) 51, and the remaining amount of the battery 14 is detected by the measured specific gravity of the electrolyte solution. Is done. The operation time of the air curtain device 40 is adjusted according to the measured specific gravity of the electrolyte solution of the battery 14 (result of detection of the remaining amount of the battery 14).

  Accordingly, the driver 2 (see FIG. 2) gets off after stopping the engine 12, moves to the rear side of the vehicle body 10, and opens and closes the doors 24 (first door 24a and second door 24b) (see FIG. 2). When opened, it is determined whether to start the blower 42 (see FIG. 3) of the air curtain device 40 according to the remaining amount of the battery 14 detected by the specific gravity of the electrolyte of the battery 14 measured at that time. It is configured to be.

  At this time, in the first embodiment, when the blower 42 is started (when the operation of the air curtain device 40 is started), the specific gravity of the electrolyte of the battery 14 is equal to or lower than a predetermined threshold value Dth (see FIG. 4). When the threshold value Dth) is reached, control is performed so that the blower 42 is not started. In this case, even if the open / close door 24 is opened, the air curtain device 40 is not operated, so that no air curtain is formed. Moreover, when the specific gravity of the electrolyte solution of the battery 14 is larger than the threshold value Dth, control which starts the air blower 42 is performed. As a result, as shown in FIG. 2, the air curtain device 40 is operated and a downdraft P for the air curtain is formed during the cargo handling operation.

  Further, in the first embodiment, even when the air curtain device 40 starts operation when the specific gravity of the electrolytic solution is larger than the threshold value Dth, the specific gravity of the electrolytic solution by the specific gravity sensor 15 is the freezer side control unit ( CPU) 51 and continuously measured in the control cycle. That is, the remaining amount of the battery 14 is detected in real time for each control cycle of the freezer-side control unit (CPU) 51 even when the air curtain device 40 is on (operating). Further, by continuing the operation of the air curtain device 40, the specific gravity of the electrolyte gradually decreases with the power consumption of the battery 14. Then, at the timing when it is detected that the measured specific gravity of the electrolytic solution has reached the threshold value Dth (see FIG. 4), the operation of the air curtain device 40 is forced without supplying the power of the battery 14 to the blower 42. Is controlled to stop automatically. Thereby, the operation time of the air curtain device 40 is changed according to the specific gravity of the electrolyte solution of the battery 14 during the ON operation of the air curtain device 40. For this reason, even during the cargo handling operation, the operation of the air curtain device 40 is stopped when the specific gravity of the electrolyte in the battery 14 becomes equal to the threshold value Dth.

Further, in the first embodiment, the threshold value Dth for forcibly stopping the blower 42 is the minimum specific gravity value D ₀ (corresponding to the minimum remaining amount of the battery 14 required for starting the engine 12 of the refrigeration vehicle 100). The specific gravity value is slightly larger than that shown in FIG. Thus, when the specific gravity of the electrolyte solution with the operation of the air curtain device 40 to use the battery 14 has decreased to the threshold value Dth even so as not to decrease to a minimum density value D ₀ below the threshold Dth It is configured. Therefore, when the threshold value Dth is reached, the remaining amount that is larger than the remaining amount (minimum specific gravity value D ₀ ) necessary for starting the engine 12 when starting the refrigerated vehicle 100 after the air curtain device 40 is turned off. Is surely secured in the battery 14. Here, the threshold value Dth (an example of the “first threshold value” of the present invention) for forcibly stopping the operation after the operation of the air curtain device 40 is started, and the air curtain device 40 is operated. In the first embodiment, the threshold value Dth (an example of the “second threshold value” of the present invention) used for determining whether or not to permit the operation of the air curtain device 40 from a state where the air curtain device 40 is permitted is the same value in the first embodiment. Is set to

  Here, the above control content will be described with reference to FIG. FIG. 4 shows the transition of the specific gravity (vertical axis) of the electrolyte solution of the battery 14 (see FIG. 3) when the use state (time) of the freezer 100 (see FIG. 1) is taken along the horizontal axis, and the response. The operation contents of the air curtain device 40 (see FIG. 3) controlled by the control are shown.

  While the refrigerator car 100 is running (the air curtain device 40 is off), the battery 14 (see FIG. 3) is charged by the alternator 12a (see FIG. 3). At the same time, it gradually increases toward a fully charged state. Here, a first example (pattern A) in which the remaining amount of the battery 14 is relatively large will be described first.

  As shown in FIG. 4, in the pattern A (thick solid line), when the refrigeration vehicle 100 stops and the engine 12 (see FIG. 1) is turned off, the state is close to a fully charged state. Assuming that, the specific gravity of the electrolyte in this case is much larger than the threshold value Dth. In addition, the specific gravity of the electrolyte does not substantially change during the period until the opening / closing door 24 (see FIG. 2) is opened after the vehicle stops. In this case, the remaining amount of the battery 14 detected from the specific gravity of the electrolyte measured by the specific gravity sensor 15 (see FIG. 3) is an amount sufficient to start the operation of the air curtain device 40 (see FIG. 3). is there. Then, an off signal is output from the open / close door switch 72 (see FIG. 2) in conjunction with the operation of opening the open / close door 24 by the driver 2 (see FIG. 2). Based on the detection of the off signal on the freezer side control unit 51 (see FIG. 3), the power of the battery 14 is supplied to the blower 42 (see FIG. 3), and the blower 42 is started (turned on).

  Thereafter, as the operation of the air curtain device 40 continues, the specific gravity of the electrolyte (the remaining amount of the battery 14) gradually decreases. The operation of the air curtain device 40 is stopped when the specific gravity of the electrolyte measured by the specific gravity sensor 15 for each control cycle of the freezer side control unit (CPU) 51 becomes equal to the threshold value Dth. Thereafter, after the cargo handling operation is completed and the driver 2 closes the door 24, the driver 2 gets into the driver's seat 13a (see FIG. 1) and starts the engine 12 (see FIG. 2). At this time, since the specific gravity of the electrolytic solution is substantially equal to the threshold value Dth, the remaining amount of the battery 14 is sufficiently secured, and the engine 12 is started without any problem. After the engine 12 is started, the power supply source is transferred from the battery 14 to the alternator 12a (see FIG. 1). During traveling, charging of the battery 14 by the alternator 12a is resumed. In the state where the operation of the air curtain device 40 is continued in the pattern A, when the cargo handling operation by the driver 2 is finished and the open / close door 24 is closed before the specific gravity of the electrolyte reaches the threshold value Dth, The blower 42 of the air curtain device 40 is stopped based on the ON signal from the open / close door switch 72.

Next, in the pattern B (thick broken line) as the second example, the specific gravity of the electrolyte solution of the battery 14 during traveling of the refrigerator 100 is smaller than that of the pattern A, and a predetermined amount is charged during traveling. Even if it is done, the specific gravity of the electrolyte does not reach the threshold value Dth when the refrigeration vehicle 100 stops and the engine 12 is turned off. In this case, even if the battery 14 has a remaining amount capable of operating the air curtain device 40, if the air curtain device 40 is operated with this remaining amount, the engine 12 is generated when the refrigerator 100 starts. There is a high possibility that you will not be able to start. For this reason, in the pattern B, even if the opening / closing door 24 is opened, the power of the battery 14 is not supplied to the blower 42 and the blower 42 is not started. Thereafter, the cargo handling operation is completed, and the driver 2 starts the engine 12 in order to start the refrigeration vehicle 100. In this case, the specific gravity of the electrolytic solution is smaller than the threshold value Dth, but is larger than the minimum specific gravity value D ₀ of the electrolytic solution corresponding to the minimum remaining amount of the battery 14 necessary for starting the engine 12, so that the engine 12 has no problem. It is activated. After departure, charging of the battery 14 by the alternator 12a is resumed. If the specific gravity of the running electrolyte exceeds the threshold value Dth, the operation content of the air curtain device 40 after the next stop is the same as in the pattern A case.

  Further, when the engine 12 of the refrigeration vehicle 100 (vehicle main body 10) is in an on state, such as during traveling or temporarily stopped, the compressor 31 is driven together with the engine 12 as shown in FIG. Thereby, the cooling unit 30 is operated and the inside of the freezer 20 is cooled to a desired temperature. In this case (when engine 12 is on), air curtain device 40 is not operated. The refrigeration vehicle 100 according to the first embodiment is configured as described above.

  Next, a control processing flow of the freezer control unit 51 when the air curtain device 40 is operated in the refrigerator 100 according to the first embodiment will be described with reference to FIGS.

  As shown in FIG. 5, first, in step S1, detection of the specific gravity of the electrolyte solution of the battery 14 is started by the freezer control unit 51 (see FIG. 3). That is, the current specific gravity value of the electrolyte detected by the specific gravity sensor 15 (see FIG. 3) attached to the battery 14 is acquired by the freezer control unit 51. In the first embodiment, as shown in FIG. 4, during running of the refrigerator 100, after stopping, and during operation of the air curtain device 40, the battery 14 is controlled every control cycle of the freezer side control unit (CPU) 51. The specific gravity value of the electrolytic solution is acquired by the freezer control unit 51.

  And in step S2, while it is judged by the freezer side control part 51 whether the state which the freezer truck 100 stopped (parking) was detected, it is judged that the state which the freezer truck 100 stopped was detected. This process is repeated. In the determination of step S2, the off signal when the driver 2 (see FIG. 2) turns the ignition key (not shown) to the engine stop position and turns off the engine 12 (see FIG. 1) is an engine switch sensor 71 (see FIG. 2). It is determined that the state in which the freezer 100 is stopped is detected based on the output from the control unit 51 (see FIG. 3) and input to the freezer control unit 51.

  When it is determined in step S2 that the state where the freezer 100 has stopped is detected, in step S3, the freezer-side control unit 51 determines whether or not the open / close door 24 (see FIG. 2) has been opened. . Specifically, based on the fact that the open signal is output from the open / close door switch 72 (see FIG. 2) and input to the freezer control unit 51 by the operation of opening the open / close door 24 of the driver 2, the open / close door 24 is It is determined that it has actually opened. The determination in step S3 is repeated until the open state of the door 24 is detected.

  When it is determined in step S3 that the open state of the open / close door 24 of the freezer 20 is detected, in step S4 in the first embodiment, the freezer-side control unit 51 performs the current specific gravity of the electrolyte of the battery 14. It is determined whether or not it is larger than the threshold value Dth. In step S4, when it is determined that the specific gravity of the electrolyte is equal to or less than the threshold value Dth, this control processing flow is ended. In this case, even if the opening / closing door 24 is opened, the operation of the air curtain device 40 is not performed. After the end of this control process flow, the present control process flow shown in FIG. 5 is executed again.

  On the other hand, if it is determined in step S4 that the specific gravity of the electrolytic solution is larger than the threshold value Dth, the blower 42 (see FIG. 3) is started based on the instruction of the freezer control unit 51 in step S5. In this case, the electric power of the battery 14 is supplied to the blower 42 and the operation of the air curtain device 40 is started. As a result, as shown in FIG. 2, when the driver 2 opens the opening / closing door 24 and performs the cargo handling operation of the article, an air curtain (downward airflow P) is formed in the vicinity of the opening 20b.

  Thereafter, as shown in FIG. 5, during operation of the air curtain device 40, in step S <b> 6, the freezer-side control unit 51 determines whether or not the current specific gravity of the electrolyte of the battery 14 has become equal to or lower than the threshold value Dth. To be judged. If it is determined in step S6 that the specific gravity of the electrolyte is not less than or equal to the threshold value Dth (greater than the threshold value Dth), the closed state of the open / close door 24 (see FIG. 2) is detected in step S7. It is determined whether or not it has been done.

  In the determination of step S7, when the air curtain device 40 is in operation and the driver 2 closes the open / close door 24, an ON signal is output from the open / close door switch 72 (see FIG. 3) and the freezer. Based on the input to the side control unit 51, it is determined that the closed state of the door 24 has been detected. If it is determined in step S7 that the open / close door 24 is not in the closed state, the process returns to step S6 and the same process determination is repeated. Since the specific gravity of the electrolytic solution is larger than the threshold value Dth while the processing is repeated in the loop of steps S6 and S7, the operation of the air curtain device 40 is continued.

  In the first embodiment, when it is determined in step S6 that the specific gravity of the detected electrolyte is equal to or less than the threshold value Dth (threshold value Dth) even when the air curtain device 40 is in operation. In step S8, the blower 42 is stopped based on a command from the freezer control unit 51. That is, control for forcibly stopping the supply of power from the battery 14 to the blower 42 is performed. Thereby, the operation of the air curtain device 40 is ended.

  If it is determined in step S7 that the open / close door switch 72 (see FIG. 3) is turned on and thus the open / close door 24 is closed, the blower 42 is stopped in step S8, and this control processing flow is as follows. Is terminated. After the end of this control process flow, the present control process flow shown in FIG. 5 is executed again.

  In the first embodiment, as described above, the battery is provided with the freezer side control unit 51 that performs control to change the operation time of the air curtain device 40 according to the remaining amount of the battery 14 (specific gravity of the electrolyte). Since the operation time (operation stop timing) of the air curtain device 40 is appropriately changed (adjusted) based on the remaining amount of the battery 14 (the specific gravity of the electrolyte), the remaining battery 14 is caused by the operation of the air curtain device 40. It can suppress that quantity falls too much. As a result, it is possible to prevent the engine 12 of the refrigeration vehicle 100 (vehicle main body 10) from being activated due to the operation of the air curtain device 40.

  In the first embodiment, the specific gravity sensor 15 is provided to detect the remaining amount of the battery 14 based on the specific gravity of the electrolyte solution of the battery 14, and the operation time of the air curtain device 40 according to the specific gravity of the electrolyte solution of the battery 14. The freezer side control unit 51 is configured to perform control to change the value. Here, since the remaining amount of the battery 14 is accurately reflected in the specific gravity of the electrolytic solution of the battery 14, the remaining amount of the battery 14 can be accurately detected based on the specific gravity of the electrolytic solution. Accordingly, the operation time (operation stop timing) of the air curtain device 40 can be accurately changed (adjusted) according to the remaining amount of the battery 14 (specific gravity of the electrolyte) detected with high accuracy. It is possible to more accurately suppress the remaining amount of the battery 14 from being reduced below the remaining amount necessary for starting the engine 12 due to the operation of 40.

  In the first embodiment, the remaining amount of the battery 14 is detected by the specific gravity of the electrolyte solution of the battery 14 during the ON operation of the air curtain device 40, and the electrolyte solution of the battery 14 during the ON operation of the air curtain device 40 is detected. The freezer side control unit 51 is configured to perform control to change the operation time of the air curtain device 40 according to the specific gravity. In this way, the remaining amount of the battery 14 during operation of the air curtain device 40 is detected in real time by detecting the remaining amount of the battery 14 during operation of the air curtain device 40 (during operation). Since it can be detected with high accuracy, the operation time (operation stop timing) of the air curtain device 40 can be adjusted while detecting the remaining amount of the battery 14 (specific gravity of the electrolyte) in real time. The operation stop control of the air curtain device 40 can be performed more appropriately and accurately.

  Further, in the first embodiment, after the operation of the air curtain device 40 is started, the operation of the air curtain device 40 is stopped based on the fact that the specific gravity (remaining amount) of the electrolyte of the battery 14 has become equal to or less than the threshold value Dth. The freezer side control part 51 is comprised so that control may be performed. As a result, the operation of the air curtain device 40 is stopped when the specific gravity (remaining amount) of the electrolyte of the battery 14 becomes equal to or less than the threshold value Dth (threshold value Dth) after the operation of the air curtain device 40 starts. The specific gravity (remaining amount) of the electrolyte solution of the battery 14 can be suppressed from decreasing below the threshold value Dth. Accordingly, it is possible to easily suppress the remaining amount of the battery 14 from being excessively reduced due to the operation of the air curtain device 40, so that the vehicle main body 10 (refrigeration car 100 is caused by the operation of the air curtain device 40. ) Can not be easily started.

In the first embodiment, the threshold Dth is greater than the minimum density value _{D 0} of the electrolyte of the battery 14 required to start the engine 12 of the refrigerated vehicle 100 (vehicle body 10). Thus, even when driving an air curtain device 40 using the battery 14, greater specific gravity than the minimum density value D ₀ of the electrolyte of the battery 14 necessary for starting the engine 12 (remaining amount) is reliably secured Therefore, the engine 12 can be reliably started when the refrigeration vehicle 100 starts after the cargo handling operation.

  In the first embodiment, when the specific gravity (remaining amount) of the electrolyte solution of the battery 14 is equal to or less than the threshold value Dth when the operation of the air curtain device 40 is started, the operation of the air curtain device 40 is not started ( The freezer side control unit 51 is configured to perform control (not permitted to start operation). Thereby, before the air curtain device 40 is operated (before the blower 42 is started), the operation of the air curtain device 40 is started when the specific gravity (remaining amount) of the electrolyte in the battery 14 is already equal to or less than the threshold value Dth. Therefore, when the specific gravity (remaining amount) of the electrolyte solution of the battery 14 is small, it is possible to prevent the specific gravity (remaining amount) from further decreasing. Also by this, it is possible to prevent the specific gravity (remaining amount) of the electrolyte solution of the battery 14 from being lowered too much, so that it is possible to prevent the engine 12 from being started.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. 1 to 3 and FIGS. 5 to 8. In the second embodiment, an example in which the voltage of the battery 14 is measured by using the voltage sensor 16 (see FIG. 6) instead of the specific gravity sensor 15 (see FIG. 3) to detect the remaining amount of the battery 14 will be described. . In the figure, components similar to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment.

  As shown in FIG. 6, the refrigerator car 200 according to the second embodiment includes a voltage sensor 16 having a function of detecting the voltage value of the battery 14. The voltage sensor 16 is connected to the battery 14 so that a voltage between a positive terminal and a negative terminal (not shown) provided in the battery 14 can be measured.

  In the refrigerator 200, when the engine 12 (see FIG. 1) is on, power for charging is supplied from the alternator 12a (see FIG. 1) to the battery 14 (see FIG. 1). Regardless of the amount, the voltage of the battery 14 shows a substantially constant value (24V). On the other hand, when the engine 12 is off, no power is supplied from the alternator 12a to the battery 14, and the voltage of the battery 14 tends to decrease as the remaining amount of the battery 14 decreases. In addition, since the air curtain device 40 (see FIG. 2) is often operated by the power of the battery 14 in a state where the engine 12 is stopped after the refrigeration vehicle 200 is stopped, the air curtain device 40 is operated ( When the battery 14 is on, the voltage of the battery 14 decreases as the remaining amount of the battery 14 decreases. In the second embodiment, paying attention to this point, the voltage of the battery 14 when the engine 12 of the refrigerator 200 is turned off and the voltage value of the battery 14 when the air curtain device 40 is turned on thereafter are determined. The remaining amount is configured to be detected. Then, control for changing (adjusting) the operation time of the air curtain device 40 is performed according to the measured voltage value of the battery 14 (remaining amount of the battery 14).

  Here, the above control content will be described with reference to FIG. FIG. 7 shows the transition of the voltage value (vertical axis) of the battery 14 (see FIG. 6) when the usage state (time) of the freezer 200 (see FIG. 6) is taken on the horizontal axis, and the control is performed accordingly. The operation content of the air curtain device 40 (see FIG. 6) is shown.

  While the refrigerator car 200 is running (the air curtain device 40 is off), the battery 14 is charged by the alternator 12a (see FIG. 6), so that the voltage value of the battery 14 appears to be a substantially constant value Vf (24V ). Thereafter, when the refrigerating vehicle 200 stops and the engine 12 (see FIG. 6) is turned off, the voltage value (24 V) does not substantially change if the remaining amount of the battery 14 is originally large. Therefore, as shown in the first example (pattern A (thick solid line)), the voltage value (full charge state (24V)) measured by the voltage sensor 16 (see FIG. 6) is greater than the threshold value Vth. Is much bigger. For this reason, when the opening / closing door 24 (see FIG. 2) is opened, the blower 42 (see FIG. 6) of the air curtain device 40 is started together with the operation permission determination.

As the operation of the air curtain device 40 continues, the voltage value (remaining amount of the battery 14) gradually decreases but gradually decreases. The operation of the air curtain device 40 is stopped when the voltage value measured by the voltage sensor 16 for each control cycle of the freezer control unit (CPU) 51 becomes equal to the threshold value Vth. Also in the second embodiment, the threshold value Vth for forcibly stopping the blower 42 is the minimum voltage value V ₀ corresponding to the minimum remaining amount of the battery 14 required for starting the engine 12 of the refrigerator 200. The voltage value is slightly larger than (see FIG. 7).

  Thereafter, after the cargo handling operation is completed and the open / close door 24 is closed, the driver 2 (see FIG. 2) starts the engine 12. At this time, since the voltage value is substantially equal to the threshold value Vth, the remaining amount of the battery 14 is sufficiently secured, and the engine 12 is started without any trouble. After the engine 12 is started, the power supply source is transferred from the battery 14 to the alternator 12a. Then, charging of the battery 14 by the alternator 12a is resumed during traveling. Further, when the operation of the air curtain device 40 is continued in the pattern A and the cargo handling operation by the driver 2 is completed and the open / close door 24 is closed before the voltage value reaches the threshold value Vth, the air curtain The blower 42 of the device 40 is stopped.

  Also in the second embodiment, a threshold value Vth (an example of the “first threshold value” in the present invention) for forcibly stopping the operation after the operation of the air curtain device 40 is started, and the air The threshold value Vth (an example of the “second threshold value” in the present invention) for allowing the air curtain device 40 to start operation when the curtain device 40 is not in operation is set to the same value. .

Further, in contrast to the above, when the freezer 200 is stopped and the engine 12 is turned off, if the remaining amount of the battery 14 is not sufficient, the voltage value of the battery 14 is reduced when the engine 12 is turned off. As shown in the pattern B (thick broken line) as the second example, it greatly decreases. When the voltage value of the battery 14 is equal to or lower than the threshold value Vth, the power of the battery 14 is not supplied to the blower 42 even when the open / close door 24 is opened, and the blower 42 is not started. That is, the start of operation of the air curtain device 40 is not permitted. Thereafter, the cargo handling operation is completed, and the driver 2 starts the engine 12 in order to start the refrigeration vehicle 200. In this case, although the voltage value is smaller than the threshold value Vth, it is larger than the minimum voltage value V ₀ corresponding to the remaining amount of the battery 14 necessary for starting the engine 12, so that the engine 12 is started without any trouble. After the engine 12 is started, the power supply source is transferred from the battery 14 to the alternator 12a. Then, charging of the battery 14 by the alternator 12a is resumed during traveling.

  Hereinafter, the control processing flow of the freezer side control unit 51 according to the second embodiment will be described.

  First, in step S21 of the control processing flow shown in FIG. 8, detection of the voltage value of the battery 14 is started by the freezer control unit 51 (see FIG. 6). That is, the current voltage value detected by the voltage sensor 16 (see FIG. 6) attached to the battery 14 is acquired by the freezer control unit 51. Also in the second embodiment, the voltage value of the battery 14 is controlled by the freezer-side control at every control cycle of the freezer-side control unit (CPU) 51 while the refrigerator 200 is running, after stopping, and during the operation of the air curtain device 40. Acquired by the unit 51.

  In step S22 and step S23, as in the first embodiment, the presence or absence of parking (parking) of the freezer car 200 (vehicle main body 10), and the open state of the open / close door 24 after the freezer car 200 stops. The presence or absence of is determined. If it is determined that the open state of the door 24 is detected, in step S24 in the second embodiment, the freezer-side control unit 51 determines whether the current voltage value of the battery 14 is greater than the threshold value Vth. Is judged. If it is determined in step S24 that the voltage value is equal to or lower than the threshold value Vth, the present control processing flow ends without operating the air curtain device 40.

  On the other hand, when it is determined in step S24 that the voltage value is larger than the threshold value Vth, the blower 42 (see FIG. 6) is started based on the command of the freezer control unit 51 in step S25. In this case, the electric power of the battery 14 is supplied to the blower 42 and the operation of the air curtain device 40 is started.

  Here, in the second embodiment, in step S26, the freezer-side control unit 51 determines whether or not the current voltage value of the battery 14 is equal to or lower than the threshold value Vth. If it is determined in step S26 that the voltage value is not less than or equal to the threshold value Vth (greater than the threshold value Vth), whether the closed state of the open / close door 24 (see FIG. 2) has been detected in step S27. It is determined whether or not. If it is determined in step S27 that the open / close door 24 is not closed, the process returns to step S26 and the same determination is repeated. Since the voltage value is larger than the threshold value Vth while the process is repeated in the loop of steps S26 and S27, the operation of the air curtain device 40 is continued.

  In the second embodiment, when it is determined in step S26 that the detected voltage value is equal to or lower than the threshold value Vth (threshold value Vth) even when the air curtain device 40 is in operation. Advances to step S28, and the blower 42 is stopped based on a command from the freezer control unit 51. That is, control for forcibly stopping the supply of power from the battery 14 to the blower 42 is performed. Thereby, the operation of the air curtain device 40 is ended.

  If it is determined in step S27 that the open / close door switch 72 (see FIG. 6) is turned on and the open / close door 24 is closed, the blower 42 is stopped in step S28, and this control processing flow is as follows. Is terminated. After the end of this control process flow, the present control process flow shown in FIG. 8 is executed again.

  In the second embodiment, as described above, the voltage sensor 16 is provided, the remaining amount of the battery 14 is detected from the voltage value of the battery 14, and the operation time of the air curtain device 40 is set according to the voltage value of the battery 14. The freezer side control part 51 is comprised so that control to change may be performed. Thereby, since the voltage value of the battery 14 varies depending on the remaining amount of the battery 14, the remaining amount of the battery 14 can be easily detected based on the voltage value of the battery 14. Thereby, the operation time (operation stop timing) of the air curtain device 40 can be easily changed (adjusted) according to the detected remaining amount (voltage value) of the battery 14. As a result, it is possible to easily suppress the remaining amount of the battery 14 from dropping below the remaining amount necessary for starting the engine 12.

  Further, in the second embodiment, the battery 14 is based on the voltage value of the battery 14 when the engine 12 of the refrigeration vehicle 200 (vehicle body 10) is off and the voltage value of the battery 14 when the air curtain device 40 is on (during operation). 14 is detected, and the operation time of the air curtain device 40 is changed according to the voltage value of the battery 14 (including the case where the operation time is set to 0 (when the operation start is not permitted)). Thus, the freezer side control unit 51 is configured. Here, when the engine 12 is on, power for charging is supplied from the alternator 12a to the battery 14, so that the voltage of the battery 14 shows a substantially constant value regardless of the remaining amount of the battery 14. On the other hand, when the engine 12 is off, no power is supplied from the alternator 12a to the battery 14, and the voltage of the battery 14 tends to decrease as the remaining amount of the battery 14 decreases. Further, since the air curtain device 40 is often operated by the power of the battery 14 in a state where the engine 12 after the refrigeration vehicle 200 is stopped, when the air curtain device 40 is operated (on), The smaller the remaining amount of the battery 14, the lower the voltage of the battery 14. Therefore, as described above, the remaining amount of the battery 14 can be easily obtained by detecting the voltage value of the battery 14 when the engine 12 is off (when the engine 12 is stopped) and when the air curtain device 40 is on (operation). Therefore, the operation time of the air curtain device 40 is easily adjusted according to the detected remaining amount (voltage value) of the battery 14 (when the operation time is set to 0 (when the operation start is not permitted). Control) can be performed.

  When the remaining amount (voltage value) of the battery 14 is detected when the air curtain device 40 is on (during operation), the remaining amount of the battery 14 during operation of the air curtain device 40 can be detected in real time. Therefore, the operation time (operation stop timing) of the air curtain device 40 can be adjusted while detecting the remaining amount (voltage value) of the battery 14 in real time. As a result, the air curtain device 40 can be adjusted more appropriately. Operation stop control can be performed. The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. 2, 6 and 9 to 11. In the third embodiment, unlike the second embodiment, an example in which the amount of voltage change of the battery 14 is measured and the remaining amount of the battery 14 is detected will be described. In the third embodiment, the same control block configuration as that of the second embodiment shown in FIG. 6 is used.

  In the refrigerator truck according to the third embodiment, the remaining amount of the battery 14 is grasped from the voltage change amount (voltage drop amount) of the battery 14 (see FIG. 6) measured using the voltage sensor 16 (see FIG. 6). The operation time of the air curtain device 40 (see FIG. 6) is changed (adjusted). That is, in the second embodiment, the operation control of the air curtain device 40 is performed based on the voltage value of the battery 14 acquired from the voltage sensor 16, whereas in the third embodiment, a load is applied to the battery 14. The operation control of the air curtain device 40 is performed based on the amount of change in the voltage value of the battery 14 before and after the operation. The reason for this is that the amount of voltage change (voltage drop) of the battery 14 increases as the remaining amount of the battery 14 decreases. Therefore, the remaining amount of the battery 14 can be easily achieved by the amount of voltage change (voltage drop) when using the battery 14. This is because it is possible to detect it.

  That is, as shown in FIG. 9, the voltage value of the battery 14 (see FIG. 6) while the refrigeration vehicle is running and the battery when the refrigeration vehicle stops and the engine 12 (see FIG. 6) is turned off. Whether or not to permit the operation of the air curtain device 40 (see FIG. 6) to be started is determined by the difference (voltage drop amount) from the voltage value of 14. For example, as shown in the pattern A (thick solid line), when the remaining amount of the battery 14 is originally large, the voltage change amount ΔV1 after the engine 12 is turned off is relatively small. On the contrary, as shown in the pattern B (thick broken line), when the remaining amount of the battery 14 is originally low, the voltage change amount ΔV2 after the engine 12 is turned off is relatively compared with the voltage change amount ΔV1. large. Therefore, in the third embodiment, when the voltage change amount ΔV1 is less than the threshold value P (ΔV1 <P) as in the pattern A, the freezer-side control unit 51 determines that the operation of the air curtain device 40 is permitted to start. Be defeated. Further, when the voltage change amount ΔV2 is equal to or greater than the threshold value P (ΔV2 ≧ P) as in the pattern B, the freezer-side control unit 51 determines that the operation of the air curtain device 40 is not permitted.

  Further, as shown in FIG. 10, it is assumed that the opening / closing door 24 (see FIG. 2) is subsequently opened in the pattern A in which it is determined that the operation of the air curtain device 40 is permitted when the refrigerator is stopped. Thereby, the electric power of the battery 14 is supplied to the blower 42 (see FIG. 6), and the operation of the air curtain device 40 is actually started.

  Here, in the third embodiment, the voltage value of the battery 14 when the refrigeration vehicle stops (when the blower 42 is turned off immediately before the start of the blower 42) and the voltage value of the battery 14 when the blower 42 is turned on immediately after the start of the blower 42 are voltage sensors. 16, and the difference (voltage change amount) of the voltage value is calculated by the freezer-side control unit 51 based on those voltage values, thereby determining whether or not to continue the operation of the air curtain device 40. Is done. For example, as shown in the pattern A1 (thick solid line), when the remaining amount of the battery 14 is originally large, the voltage change amount ΔV3 immediately after the blower 42 is started is relatively small. On the contrary, as shown in the pattern A2 (thick broken line), when the remaining amount of the battery 14 is originally not sufficient, the voltage change amount ΔV4 immediately after the start of the blower 42 is relatively compared with the voltage change amount ΔV3. Big. Therefore, when the voltage change amount ΔV3 is less than the threshold value Q (ΔV3 <Q) as in the pattern A1, the freezer control unit 51 determines that the operation of the air curtain device 40 is to be continued. The Further, when the voltage change amount ΔV4 is equal to or greater than the threshold value Q (ΔV4 ≧ Q) as in the pattern A2 (thick broken line), the freezer control unit 51 recognizes that the operation of the air curtain device 40 is continued. No judgment is made. In this case, the blower 42 is immediately stopped.

  In the third embodiment, as shown in FIG. 10, when the operation of the air curtain device 40 is continued according to the pattern A1, the voltage sensor 16 (see FIG. 6) changes (decreases) the battery 14 from time to time. Whether or not to continue the operation of the air curtain device 40 based on the voltage change amount (voltage drop amount) calculated by the freezer-side control unit 51 using the detected voltage value. It is determined. In other words, in the third embodiment, during the ON operation of the air curtain device 40, the voltage value of the battery 14 is detected by the voltage sensor 16 every control cycle of the freezer side control unit (CPU) 51 (see FIG. 6). The amount of voltage change (difference between the voltage value at the previous measurement and the voltage value at the current measurement) is calculated by the freezer control unit 51. In this case, the amount of voltage change gradually increases as the remaining amount of the battery 14 decreases with the operation of the air curtain device 40. When the calculated voltage change amount is not equal to or greater than the threshold value R (threshold value R) (when it is smaller than the threshold value R), it is permitted to continue the operation of the air curtain device 40. Judgment is made. On the contrary, when the calculated voltage change amount is equal to or greater than the threshold value R, a determination is made to stop the operation of the air curtain device 40. Therefore, when it is determined to stop the operation of the air curtain device 40, the blower 42 is immediately stopped.

  Next, with reference to FIG. 2, FIG. 6, and FIGS. 9-11, the control processing flow of the freezer side control part 51 when the air curtain apparatus 40 is drive | operated in the freezing vehicle by 3rd Embodiment is demonstrated.

  As shown in FIG. 11, first, in step S31, detection of the voltage value of the battery 14 (see FIG. 6) is started by the freezer control unit 51 (see FIG. 6). In step S32, the freezer-side control unit 51 determines whether or not the state where the freezer has stopped is detected, and this process is repeated until it is determined that the state where the freezer has stopped is detected. . Also in the third embodiment, as in the second embodiment, the battery 14 is controlled at every control cycle of the freezer side control unit (CPU) 51 while the refrigerator is running, after stopping, and during operation of the air curtain device 40. Is obtained by the freezer-side control unit 51.

  When it is determined in step S32 that the state where the freezer has stopped is detected, in the third embodiment, the engine 12 (see FIG. 6) is changed from the on state to the off state by the freezer-side control unit 51 in step S33. A voltage change amount (voltage drop amount) of the battery 14 is calculated. Then, in step S34, it is determined whether or not the voltage change amount is less than a threshold value P. If it is determined in step S34 that the voltage change amount is equal to or greater than the threshold value P, that is, if the voltage change amount ΔV2 shown in pattern B in FIG. .

  If it is determined in step S34 that the voltage change amount is less than the threshold value P, that is, if the voltage change amount ΔV1 shown in the pattern A in FIG. 10, the freezer side in step S35. The control unit 51 determines whether or not the open / close door 24 (see FIG. 2) has been opened, and this determination is repeated until the open state of the open / close door 24 is detected.

  If it is determined in step S35 that the open state of the open / close door 24 has been detected, the blower 42 (see FIG. 6) is started based on a command from the freezer control unit 51 in step S36.

  Here, in the third embodiment, the voltage change amount (voltage drop amount) of the battery 14 when the air curtain device 40 (see FIG. 6) is changed from the off state to the on state by the freezer-side control unit 51 in step S37. ) Is calculated. In step S38, it is determined whether the voltage change amount is less than the threshold value Q. If it is determined in step S38 that the voltage change amount is equal to or greater than the threshold value Q, that is, if it is the voltage change amount ΔV4 shown in pattern A2 in FIG. 10, the process proceeds to step S42 and the freezer side control is performed. The blower 42 is immediately stopped based on the command of the unit 51, and this control processing flow is ended.

  If it is determined in step S38 that the voltage change amount is less than the threshold value Q, that is, if it is the voltage change amount ΔV3 shown in the pattern A1 in FIG. 10, in step S39, the freezer side The control unit 51 calculates a voltage change amount (voltage drop amount) of the battery 14 during operation (on operation) of the air curtain device 40.

  In the third embodiment, it is determined in step S40 whether or not the voltage change amount is equal to or greater than the threshold value R. When it is determined in step S40 that the voltage change amount is equal to or greater than the threshold value R (threshold value R), the process proceeds to step S42, and the blower 42 is stopped based on the command from the freezer control unit 51, and the main control The processing flow ends.

  When it is determined in step S40 that the voltage change amount is not the threshold value R (smaller than the threshold value R), in step S41, the freezer-side control unit 51 controls the opening / closing door 24 (see FIG. 2). It is determined whether or not a closed state is detected. If it is determined in step S41 that the open / close door 24 is not in the closed state, the process returns to step S39 and the same process determination is repeated. While the repetitive processing proceeds in the order of steps S39, S40, and S41, the voltage change amount calculation processing in step S39 is the voltage sensor 16 (see FIG. 5) continuously measured in the control cycle of the freezer side control unit (CPU) 51. 6) is used.

  If it is determined in step S41 that the open / close door switch 72 (see FIG. 2) is turned on and the open / close door 24 (see FIG. 2) is closed, the blower 42 is stopped in step S42. This control processing flow ends. After the end of this control process flow, the present control process flow shown in FIG. 11 is executed again.

  In the third embodiment, as described above, the remaining amount of the battery 14 is detected from the voltage change amount of the battery 14, and the operation time of the air curtain device 40 is changed according to the voltage change amount of the battery 14. The freezer side control part 51 is comprised so that it may perform. As a result, the voltage change amount (voltage drop amount) of the battery 14 becomes larger as the remaining amount of the battery 14 is smaller. Therefore, the remaining amount of the battery 14 can be easily obtained by the voltage change amount (voltage drop amount) when the battery 14 is used. Can be detected. As a result, the operation time (operation stop timing) of the air curtain device 40 can be easily changed (adjusted) according to the detected remaining amount (voltage change amount) of the battery 14. Therefore, it is possible to easily suppress the remaining amount of the battery 14 from being reduced below the remaining amount necessary for starting the engine 12.

  In the third embodiment, the voltage change amount corresponding to the remaining amount of the battery 14 is the voltage change amount of the battery 14 when the engine 12 is switched from on to off, and the air curtain device 40 is off. The remaining amount of the battery 14 is detected from the voltage change amount of the battery 14 at the time of switching from ON to ON, and the operation time of the air curtain device 40 is changed according to the voltage change amount of the battery 14 (the operation time is changed). The freezer-side control unit 51 is configured to perform control (including the case of 0 (including the case where the start of operation is not permitted)). Thus, if the amount of voltage change of the battery 14 when the engine 12 is switched from on to off and the amount of voltage change of the battery 14 when the air curtain device 40 is switched from off to on are used. Since the remaining amount of the battery 14 can be easily detected, the operation time of the air curtain device 40 is changed according to the detected remaining amount (voltage change amount) of the battery 14 (the operation time is set to 0). Control (including the case (when the start of operation is not permitted)) is controlled, and it is possible to easily suppress the remaining amount of the battery 14 from being too low.

  In the third embodiment, the remaining amount of the battery 14 is detected based on the voltage change amount of the battery 14 during the ON operation of the air curtain device 40, and the air curtain device 40 is changed according to the voltage change amount of the battery 14. The freezer side control part 51 is comprised so that control which changes operation time may be performed. Thereby, as the remaining amount of the battery 14 is smaller, the amount of decrease in the voltage value (voltage drop amount) of the battery 14 during the ON operation of the air curtain device 40 becomes larger. By detecting the voltage change amount (voltage drop amount) of the battery 14, the remaining amount of the battery 14 during the on-operation of the air curtain device 40 can be detected in real time. Thus, the operation time (operation stop timing) of the air curtain device 40 can be adjusted while detecting the remaining amount (voltage change amount) of the battery 14 in real time, so that the operation of the air curtain device 40 can be stopped more appropriately. Control can be performed. The remaining effects of the third embodiment are similar to those of the aforementioned second embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, an example in which the specific gravity of the electrolyte solution of the battery 14 or the voltage value of the battery 14 is measured in real time to change (adjust) the operation time of the air curtain device 40 has been described. However, the present invention is not limited to this. For example, the specific gravity or voltage value of the electrolyte solution of the battery 14 is detected in a plurality of stages such as high, medium, and low, and the air curtain device 40 is detected based on the specific gravity or voltage value of the electrolyte solution of the battery 14 detected in a plurality of stages. The operation time may be changed (adjusted). As an example, as in the modification of the first embodiment shown in FIG. 12, the specific gravity (remaining amount) of the battery 14 in a plurality of stages (multiple levels) and the air curtain device 40 (blower 42) corresponding to each remaining amount level. ) Is stored in advance in the ROM 52 (see FIG. 3). When the specific gravity of the electrolyte solution of the battery 14 is measured by the specific gravity sensor 15 (see FIG. 3) at the timing when the open / close door 24 (see FIG. 2) is opened, for example, the measured value of the specific gravity is the first level (high The air curtain device 40 is operated only for t1 seconds when the level) corresponds to the level), and the air curtain device 40 is operated for t2 seconds when the measured value of the specific gravity corresponds to the second level (medium level). When the measured value corresponds to the third level (low level), the freezer side control unit 51 is configured to perform control for operating the air curtain device 40 for t3 seconds. Here, t1> t2> t3.

  12, it is not necessary to always detect the remaining amount of the battery 14 by the freezer-side control unit 51, and the remaining amount of the battery 14 is determined immediately before the operation of the air curtain device 40 (opening / closing door). It suffices to detect which of the remaining levels in a plurality of stages (first to fourth levels) only once at the timing when 24 is released. Thereby, since the operation control of the air curtain apparatus 40 can be simplified, the control load of the freezer side control part 51 can be reduced by that much. In addition, when the measured value of specific gravity is a fourth level (very low level) smaller than the third level (low level), the operation start of the air curtain device 40 is not permitted (operation time: 0 second). The freezer side control unit 51 may be configured as described above. When the door 24 is closed within the time t1 (t2 or t3), the air curtain device 40 (blower 42) is operated with priority given to the ON signal from the door switch 72 (see FIG. 3). What is necessary is just to comprise the freezer side control part 51 so that it may stop. The specific gravity sensor 15 in this case is an example of the “remaining amount detection unit” in the present invention.

  Moreover, in the modification shown in FIG. 12, the example which uses the table 90 when measuring the specific gravity of the electrolyte solution of the battery 14 using the specific gravity sensor 15 was shown, but this invention is not limited to this. That is, when the voltage of the battery 14 is measured by using the voltage sensor 16 and the remaining amount of the battery 14 is detected, the configuration is the same as the modification shown in FIG. 12 (when the specific gravity of the electrolytic solution is measured). be able to. The voltage sensor 16 in this case is an example of the “remaining amount detection unit” in the present invention.

  Further, in the first and second embodiments, the “first threshold value” for forcibly stopping the operation after the operation of the air curtain device 40 of the present invention is started and the air curtain device 40 is not operated. Although an example in which the “second threshold value” for allowing the start of operation of the air curtain device 40 from the state is set equal is shown, the present invention is not limited to this. For example, the first threshold value and the second threshold value may be made different from each other by setting the second threshold value to be slightly larger than the first threshold value.

In the first and second embodiments, the threshold value Dth (specific gravity value) or the threshold value Vth (voltage value) for forcibly stopping the blower 42 from the state in which the air curtain device 40 is operated. Is shown as an example in which the specific gravity value D ₀ corresponding to the minimum remaining amount of the battery 14 required for starting the engine 12 of the refrigerator car is set to a value slightly larger than the minimum voltage value V _0. Not limited to. That is, the threshold value (specific gravity value or voltage value) for forcibly stopping the blower 42 is made the same as the minimum specific gravity value or the minimum voltage value corresponding to the minimum remaining amount of the battery 14 necessary for starting the engine 12. May be.

  Moreover, in the said 1st Embodiment, when the engine 12 of the refrigerator car 100 (vehicle main body 10) is OFF, and before operating the air curtain apparatus 40 (before the start of the air blower 42 is started), the electrolyte solution of the battery 14 The remaining amount of the battery 14 is detected by the specific gravity of the battery 14 and the specific gravity of the electrolyte solution of the battery 14 during the ON operation of the air curtain device 40, and the operation time of the air curtain device 40 is determined according to the specific gravity of the electrolyte solution of the battery 14. Although the example which comprised the freezer side control part 51 so that control which changes may be shown was shown, this invention is not limited to this. The remaining amount of the battery 14 is detected by only the specific gravity of the electrolyte of the battery 14 when the engine 12 of the refrigerator 100 is turned off or after the engine 12 is turned off and before the operation of the air curtain device 40 is started. You may perform control which changes driving time. In this case, since the operation control of the air curtain device 40 by the freezer side control unit 51 can be simplified, the control load of the freezer side control unit 51 can be reduced.

  In the second embodiment, the remaining battery 14 is determined based on the voltage value of the battery 14 when the engine 12 of the refrigerator 200 (vehicle body 10) is off and the voltage value of the battery 14 when the air curtain device 40 is on. The example in which the freezer control unit 51 is configured to detect the amount and control to change the operation time of the air curtain device 40 according to the voltage value of the battery 14 is shown, but the present invention is not limited to this. I can't. Control may be performed to change the operating time of the air curtain device 40 by detecting the remaining amount of the battery 14 based only on the voltage value of the battery 14 when the engine 12 of the refrigerator 200 is off. Control may be performed to change the operating time of the air curtain device 40 by detecting the remaining amount of the battery 14 based only on the voltage value of the battery 14 at the time. Also in this case, since the operation control of the air curtain device 40 by the freezer side control unit 51 can be simplified, the control load of the freezer side control unit 51 can be reduced.

  In the third embodiment, the voltage change amount corresponding to the remaining amount of the battery 14 is the voltage change amount of the battery 14 when the engine 12 is switched from on to off, and the air curtain device 40 is turned off. The remaining amount of the battery 14 is detected based on the voltage change amount of the battery 14 at the time of switching from time to on, and the operation time of the air curtain device 40 is changed according to the voltage change amount of the battery 14. Thus, although the example which comprised the freezer side control part 51 was shown, this invention is not limited to this. Control may be performed to change the operating time of the air curtain device 40 by detecting the remaining amount of the battery 14 based only on the voltage change amount of the battery 14 when the engine 12 is switched from on to off. Control may be performed to change the operating time of the air curtain device 40 by detecting the remaining amount of the battery 14 based only on the voltage change amount of the battery 14 when the device 40 is switched from OFF to ON. Also in this case, since the operation control of the air curtain device 40 by the freezer side control unit 51 can be simplified, the control load of the freezer side control unit 51 can be reduced.

  In the first to third embodiments, an example in which the remaining amount of the battery 14 is detected by measuring the specific gravity of the electrolyte of the battery 14, the voltage value of the battery 14, and the voltage change amount of the battery 14 is shown. However, the present invention is not limited to this. In the present invention, the remaining amount of the battery 14 may be detected using parameters other than the specific gravity, voltage value, and voltage change amount of the electrolyte solution of the battery 14. For example, as in the modifications of the first to third embodiments shown in FIG. 13, the capacity (ampere hour) of the battery 14 is measured using a capacity value measuring unit (not shown) that can measure in real time. Thus, the remaining amount of the battery 14 may be detected. In this case, since the capacity of the battery 14 directly reflects the remaining capacity of the battery 14, the remaining capacity of the battery 14 can be accurately detected based on the capacity of the battery 14 measured by the capacity value measuring unit. And the freezer side control part 51 is comprised so that control which changes the operation time of the air curtain apparatus 40 according to the capacity | capacitance of the battery 14 may be performed. Thus, the adjustment of the operation time (operation stop timing) of the air curtain device 40 is appropriately performed by accurately detecting the remaining amount of the battery 14 during operation of the air curtain device 40 in real time using the capacity value measurement unit. And can be performed with high accuracy. The capacitance value measuring unit is an example of the “remaining amount detecting unit” in the present invention.

Specifically, in the modification shown in FIG. 13, in the control described in the first embodiment shown in FIG. 4, the specific gravity of the electrolyte used as the parameter of the remaining amount of the battery 14 is replaced with the capacity. Should be done. That is, instead of the specific gravity threshold value Dth of the first embodiment, the capacity threshold value Cth is used, the capacity of the battery 14 while the refrigeration vehicle is running, the engine 12 of the refrigeration vehicle is off, and the air curtain The operation of the air curtain device 40 may be controlled by detecting in real time the capacity of the battery 14 before operating the device 40 and the capacity of the battery 14 during the ON operation of the air curtain device 40. At this time, when the capacity of the battery 14 is less than or equal to the threshold value Cth at the start of the operation of the air curtain device 40, control is performed so that the blower 42 is not started, and the capacity of the battery 14 is the threshold at the start of operation of the air curtain device 40. When it is larger than the value Cth, control for starting the blower 42 is performed. Further, the air blower 42 is controlled to be forcibly stopped at a timing when it is detected that the capacity has reached the threshold value Cth during the ON operation of the air curtain device 40. Here, the threshold value Cth is preferably set to a capacity value slightly larger than the minimum capacity value C ₀ corresponding to the minimum remaining amount of the battery 14 necessary for starting the engine 12. Also in this modified example, as in the case of the first embodiment, the threshold value Cth for forcibly stopping the operation after the operation of the air curtain device 40 is started (the “first threshold value” of the present invention). Example) and a threshold value Cth (an example of the “second threshold value” of the present invention) used for determining whether or not to permit the operation of the air curtain device 40 from a state where the air curtain device 40 is not operated. ) Are set to the same value, but the second threshold value is set to be slightly larger than the first threshold value, and the first threshold value and the second threshold value are set to They may be different from each other.

  Further, in the first to third embodiments and the modification shown in FIG. 13, the remaining amount (specific gravity, voltage, voltage change amount or capacity) of the battery 14 is changed for each control cycle of the freezer control unit (CPU) 51. Although it is configured to detect (acquire), the present invention is not limited to this. For example, the remaining amount (specific gravity, voltage, voltage change amount or capacity) of the battery 14 may be detected (acquired) at a time interval other than the control cycle of the freezer control unit (CPU) 51.

  Moreover, in the said 1st-3rd embodiment, the flow which processes a control process regarding the driving | operation of the air curtain apparatus 40 of the freezer side control part 51 provided in the control box 50 in order along a process flow for convenience of explanation. Although the description has been given using the driving flowchart, the present invention is not limited to this. In the present invention, the processing of the freezer-side control unit 51 may be performed by event-driven (event-driven) processing that executes processing in units of events. In this case, it may be performed by a complete event drive type or a combination of event drive and flow drive.

10 Vehicle body (vehicle)
14 Battery 15 Specific gravity sensor (remaining amount detection unit)
16 Voltage sensor (remaining amount detection unit)
20 Freezer (storage)
24 Opening / closing door 24a First door (opening / closing door)
24b Second door (open / close door)
30 Cooling unit 40 Air curtain device 51 Freezer side control unit (control means)
100, 200 Refrigerator

Claims (12)

A storage provided in the vehicle;
A cooling unit for cooling the inside of the storage;
An open / close door provided in the storage;
An air curtain device for blowing out air in the vicinity of the open / close door inside the storage;
A battery for supplying power to the air curtain device;
A refrigeration vehicle comprising control means for performing control to change an operation time of the air curtain device in accordance with the remaining amount of the battery.   The control means is configured to perform control to stop the operation of the air curtain device based on the fact that the remaining amount of the battery becomes equal to or less than a first threshold value after the operation of the air curtain device is started. The refrigeration vehicle according to claim 1.   The refrigeration vehicle according to claim 2, wherein the first threshold value is greater than or equal to a remaining amount of the battery required for starting an engine of the vehicle.   The control means is configured to perform control not to start the operation of the air curtain device when the remaining amount of the battery is equal to or less than a second threshold value at the start of the operation of the air curtain device. The refrigeration vehicle according to any one of claims 1 to 3.   The control means is configured to detect the remaining amount of the battery based on the specific gravity of the electrolyte solution of the battery, and to perform control to change the operation time of the air curtain device according to the specific gravity of the electrolyte solution of the battery. The refrigeration vehicle according to any one of claims 1 to 4, wherein   The control means detects the remaining amount of the battery based on the specific gravity of the electrolyte of the battery at least during the ON operation of the air curtain device, and determines the specific gravity of the electrolyte of the battery during the ON operation of the air curtain device. The refrigeration vehicle according to claim 5, wherein the refrigeration vehicle is configured to perform control to change an operation time of the air curtain device.   The control means is configured to detect the remaining amount of the battery based on the voltage value of the battery, and to perform control to change the operation time of the air curtain device according to the voltage value of the battery. The refrigerator car according to any one of claims 1 to 4.   The control means detects the voltage value of the battery when the air curtain device is on or the voltage value of the battery when the engine of the vehicle is off, and according to the voltage value of the battery, The refrigeration vehicle according to claim 7, wherein the refrigeration vehicle is configured to perform control to change an operation time of the curtain device.   The control means is configured to detect a remaining amount of the battery based on a voltage change amount of the battery, and to perform a control to change an operation time of the air curtain device according to the voltage change amount of the battery. The refrigeration vehicle according to any one of claims 1 to 4.   The control means, as the voltage change amount corresponding to the remaining amount of the battery, the voltage change amount of the battery when the air curtain device is switched from the off time to the on time, or from the on time to the off time of the engine The remaining amount of the battery is detected based on the voltage change amount of the battery at the time of switching, and control is performed to change the operation time of the air curtain device according to the voltage change amount of the battery. The refrigerator car according to claim 9.   The control means detects the remaining amount of the battery based on the voltage change amount of the battery during the ON operation of the air curtain device, and changes the operation time of the air curtain device according to the voltage change amount of the battery. The refrigeration vehicle according to claim 9, wherein the refrigerator is configured to perform control. It further comprises a remaining amount detection unit that detects the remaining amount of the battery in a plurality of stages,
The said control means is comprised so that the operation time of the said air curtain apparatus may be shortened in steps according to the low level of the said battery remaining amount detected by the said remaining amount detection part. The refrigeration vehicle according to claim 1.

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