JPH06129744A - Control device for freezing system for container - Google Patents

Abstract

PURPOSE:To prevent a container being not inspected yet before transportation, i.e., not yet received any PTI from being a transported. CONSTITUTION:A time starting from a time in which PTI is carried out with an automatic PTI means 40 to another time in which a transportation start is registered by a transportation start registration means 25 is counted by a time counting means 41. When a judgment means 43 judges that the counted time elapses a specific time set in a setting means 44, a PTI operation alarm is displayed in a displaying means 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container refrigeration unit controller.

[0002]

2. Description of the Related Art A container stores cargo within its container and operates a refrigerating unit to keep the internal temperature of the container at a preset temperature and to carry it while being loaded on ships, trucks, rail cars and the like.

An example of this type of refrigerating unit is shown in FIG. When the refrigerating unit is operated, the gas refrigerant discharged from the compressor 1 enters the condenser 2, where it radiates heat to the outside air sent by the condenser blower 3 to be condensed and liquefied. The liquid refrigerant is adiabatically expanded by being throttled by the electronic expansion valve 4, and then enters the evaporator 5, where the inside air sent by the evaporator blower 6 is cooled to evaporate and return to the compressor 1. . The cooling capacity is adjusted by opening and closing a modulating valve 8 provided in a bypass circuit 7 that connects the outlet of the compressor 1 and the inlet of the evaporator 5.

A cargo temperature sensor 10 for detecting the temperature of the cargo contained in the container 9, an outside air temperature sensor 11 for detecting the temperature of the outside air, and an intake air temperature sensor 12 for detecting the temperature of the air sucked into the evaporator 5. An outlet air temperature sensor 13 for detecting the temperature of the air blown from the evaporator 5, an overheat prevention sensor 15 for preventing the defrost heater 14 from overheating, and an evaporator outlet refrigerant for detecting the refrigerant temperature at the outlet of the evaporator 5. Temperature sensor 16, discharge refrigerant gas temperature sensor 17 for detecting the temperature of the refrigerant gas discharged from the compressor 1, high pressure sensor 18 for detecting the refrigerant pressure in the high pressure refrigerant circuit, low pressure for detecting the refrigerant pressure in the low pressure refrigerant circuit The detected value of the sensor 19 etc. is the controller 20
Entered in.

Flight start key 25, manual defrost switch 26, automatic PTI switch 27, internal temperature setting device
Input signals such as 28 are also input to the controller 20.

The output signal of the controller 20 is the compressor 1
Drive motor 21, condenser blower 3 drive motor 22, electronic expansion valve 4, modulating valve 8, evaporator blower 6 drive motor 23, defrost heater 14, ventilation device 24, inside temperature indicator 29, navigation. It is output to the data recorder 30 or the like.

In this refrigeration unit, the container 9
Pre-flight inspection (hereinafter PT
(I) is implemented. In this PTI, when the automatic PTI switch 27 is turned on, the operation, function, and performance of the refrigerating unit and each of the devices constituting the refrigerating unit are sequentially inspected.

Since this PTI requires about 8 hours to complete and is carried out separately for each of the hundreds of containers stored in the container yard, it is carried out 3 to 5 days before the day of storing the cargo in the container. .

[0009]

In the conventional apparatus described above, when the cargo is accommodated in the container, it is not known whether the PTI has already been completed for this container. When used for operation, the quality of the cargo contained in the container could be impaired due to malfunction of the refrigeration unit.

[0010]

The present invention has been invented to solve the above-mentioned problems, and its gist is to provide an operation data recording means, an operation start registration means, and an automatic PTI means. In a control device for a container refrigeration unit including:
The time means for measuring the time from the execution of the operation until the operation start is registered by the operation start registration means, and whether the time measured by the time measurement means has exceeded the predetermined time set in the setting means. The control device for a container refrigeration unit is provided with a determination means for determining whether or not and a display means for displaying a PTI execution warning when the determination means determines that a predetermined time has elapsed.

[0011]

In the present invention, because of the above-mentioned configuration, the PTI execution warning is displayed when a predetermined time has elapsed after the PTI was executed at the time of registration of the flight start.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENT One embodiment of the present invention is shown in FIG. When the automatic PTI switch 27 is turned on, the command from now on is input to the automatic PTI means 40 and the PTI is executed. This command is simultaneously input to the clock means 41, and the clock means 41 starts clocking.

When the operation start key 25 is operated, the operation data recording means 42 starts recording operation data according to an operation command from now on. This navigation command is simultaneously judged by the judging means 43.
It is determined whether or not the time measured by the time measuring means 41 has passed the predetermined time (for example, 10 days) input from the setting means 44. When the predetermined time has elapsed, this determination result is input to the display means 45, where PT
An I implementation warning is displayed. When the predetermined time has not elapsed, the time measured by the time measuring means 41 is set to zero.

In the above embodiment, the operation start key
Although the signal for operating 25 is input to the determination means 43, a signal for registering the operation start such as a signal for setting operation setting data may be input to the determination means 43.

However, if a predetermined time or more elapses after the PTI is carried out and before the operation is started, a PTI execution warning is displayed, so that the container is prevented from being used for the operation without forgetting the PTI. You can.

[0016]

According to the present invention, when the predetermined time has elapsed after the PTI was carried out when the flight start was registered, the PT
Since the I implementation warning is displayed, it is possible to prevent the quality of the cargo contained in the container from being impaired by the operation of the container whose PTI has been completed.

[Brief description of drawings]

FIG. 1 is a control block diagram showing a first embodiment of the present invention.

FIG. 2 is a system diagram of a conventional container refrigeration unit.

[Explanation of symbols]

 42 Flight data recording means 25 Flight start registration means 27 Automatic PTI switch 40 Automatic PTI means 41 Timing means 43 Judging means 44 Setting means 45 Display means

Claims (1)

[Claims] 1. A control device for a container refrigeration unit comprising operation data recording means, operation start registration means, and automatic PTI means, and when the PTI is carried out by the automatic PTI means, the operation is started by the operation start registration means. The time measuring means for measuring the time until the start is registered, the judging means for judging whether or not the time measured by the time measuring means has exceeded the predetermined time set in the setting means, and this judging means A control device for a refrigerating unit for containers, comprising: a display means for displaying a PTI execution warning when it is determined that a predetermined time has passed.