JPS644065Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a set temperature switching device for a container refrigeration system.

(Prior Art) Generally, the internal temperature of a refrigerated container is always controlled to a certain set value by a temperature control device attached to the refrigerating equipment during operation. be. This was natural since the cargo in the container was limited to one item, such as fruits and vegetables, whose optimal transport temperature was limited to one item, so there was no need to change the internal temperature during transport. Therefore, it is only necessary to change the temperature inside the refrigerator depending on the type of cargo, so each time the temperature inside the refrigerator is changed from one temperature to another, the setting value of the temperature control device must be manually switched. I should have done it.

(Problem that the invention aims to solve) In recent years, for example, containers have been used in which sterile flies are hatched inside the container, and then the internal temperature is lowered to a low temperature and the hatched flies are transported in a state of hibernation. Methods have been developed. In addition,
These unsperm flies are used in an attempt to cause the flies to disappear naturally by dispersing them in orchards and the like to make female flies lay unsperm eggs. When transporting such metamorphosing organisms in a container, at least two optimal transport temperatures are required, but if such temperature switching was performed manually as in the prior art described above, it would be extremely troublesome. Not only that, but there was also the problem of having to constantly secure personnel for this purpose, which increased personnel costs.

This invention was made in view of the above points,
The object of the present invention is to enable automatic switching of a set value for internal temperature control in a container at a desired time.

(Means for Solving the Problems) In the present invention, as a means for solving the above problems, as shown in the drawing, a thermostat is installed in the operating circuit 1 of the container refrigeration system to adjust the internal temperature. a switching means 12 for changing the setting value of 5;
Timing means 11 that operates to operate the switching means 12 after a desired time has elapsed from the start of operation of the refrigeration system.
It is attached with.

(Function) In the present invention, the following effects can be obtained by the above-mentioned means.

That is, when a desired period of time (for example, 24 hours) has elapsed since the start of operation of the refrigeration system, the switching means 12 is activated to switch the set value of the thermostat 5.
The temperature inside the refrigerator is changed to the desired temperature. Therefore, a container is obtained which can be applied to objects that require multiple optimal transportation temperatures, such as organisms that undergo metamorphosis.

(Embodiments) Hereinafter, some preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 and 2, a first embodiment of the invention is shown.

FIG. 1 shows an operating circuit 1 for a refrigeration system in a first embodiment.
, 2 is a compressor relay, 3 is a fan relay for the evaporator, and 4 is a solenoid valve (installed in the liquid pipe between the condenser and the expansion valve, and is opened during operation and closed when stopped). , 5 is a thermostat for controlling the internal air temperature, 6 is an overcurrent relay, 7 is a compressor protection thermostat, 8 is a hydraulic protection pressure switch, 9 is a high/low pressure switch, and 10 is a sensor for detecting air temperature. There is. Each of these elements is connected as shown in the figure.

As a feature of the present invention, the driving operation circuit 1 includes a timer that acts as a timer 11, and a relay that operates when the timer 11 counts up and acts as a switching means 12, which will be described in detail later. is attached.

The relay 12 is connected to the timer 11
a, and the timer 11 and the relay 12 are connected in series with an operation switch 13 of the refrigeration device.

The relay 12 changes the set value of the thermostat 5 to two levels (for example, a first set volume 15).
= 25°C and the second setting volume 16 = 5°C).

That is, as shown in FIG. 2, the timer 11 starts counting simultaneously with the closing of the operation switch 13. At this time, the first setting volume 15 of the thermostat 5 is set to the switching contacts 12a, 12 of the relay 12.
The thermostat 5 is connected to the main board 18 of the thermostat 5 via the terminals a and 12a, and the thermostat 5 is controlled according to the first setting volume 15. Therefore, the internal temperature of the container is maintained at 25° C. by the first set volume 15. and,
Timer 11 counts up (for example, 24
time has elapsed), the time limit contact 11 of the timer 11
a is closed, the coil 12b of the relay 12 is excited, the switching contacts 12a, 12a, 12a are switched, and the second setting volume 16 is set to the thermostat 5.
The thermostat 5 is controlled according to the second setting volume 16. Therefore, the internal temperature of the container is
The temperature will be maintained at 5° C. by the second setting volume 16.

In other words, before the refrigeration equipment starts operating, the timer 11
By setting the thermostat 5 to a desired setting time (for example, 24 hours), the setting value of the thermostat 5 can be automatically changed 24 hours after the start of operation.

A second embodiment of the invention is shown in FIG. 3, in which a manual switch 14 is connected in series with the timer 11 and the relay 12. This manual switch 14 is closed when a time longer than the time limit of the timer 11 is required from the start of operation to the change of the set value of the thermostat 5, or when a suitable time has elapsed after the start of operation.

4 and 5 show a third embodiment of the present invention, in which the operation circuit 1 includes two switching means (i.e., relays) 12 ₁ , 12 ₂ and two timers. Means (ie, timers) 11 ₁ and 11 ₂ are attached, and the set value of the thermostat 5 can be changed in three stages. In this case, the first relay 1 due to the count up of the first timer ₁₁₁
By the excitation of 2 ₁ , the set volume of the thermostat 5 is changed from the first set volume 15 to the second set volume 16 , and the second timer 11 _{2 is} activated.
The set volume of the thermostat 5 is changed from the second set volume 16 to the _third set volume 17 by energizing the second relay 122 by the count-up. That is, in this embodiment, the thermostat 5 is
1st, 2nd and 3rd setting volume 15, 16
and 17, the set temperature is set in 3 stages (for example, 25
℃, 15℃ and 5℃). Here, the symbols 12 ₁ a, 12 ₂ a
are switching contacts of relays 12 ₁ and 12 ₂ , 12 ₁ b, 1
2 ₂ b is the coil of relay 12 ₁ , 12 ₂ , 11 ₁ a, 1
1 ₂ a is a time contact of the timers 11 ₁ and 11 ₂ .

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that other configurations may be employed as the switching means, time limit means, etc. without departing from the gist of the invention.

(Effects of the invention) As described above, according to the invention, the operating circuit 1 of the container refrigeration system includes the switching means 12 for changing the set value of the thermostat 5 that adjusts the internal temperature.
and a time limit means 11 which acts to operate the switching means 12 after a desired time elapses from the start of operation of the refrigeration system, and when a desired time (for example, 24 hours) has elapsed from the start of operation of the refrigeration system, the switching means 12 is activated and the setting value of the thermostat 5 is changed, so that the temperature inside the refrigerator can be automatically changed to the desired temperature at a desired time after the refrigeration system starts operating, and the transformation is performed. This has the practical effect of providing a container that can be applied to objects such as living organisms that require multiple optimal transportation temperatures.

In addition, since the temperature inside the container is automatically changed, it has the effect of saving manpower compared to conventional manual systems.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram showing a set temperature switching device for a container refrigeration system according to a first embodiment of the present invention, FIG. 2 is an electric circuit diagram showing a thermostat portion in FIG. 1, and FIG. and FIG. 4 is an electric circuit diagram showing a set temperature switching device for a container refrigeration device according to the second and third embodiments of the present invention,
FIG. 5 is an electrical circuit diagram of the thermostat portion in FIG. 4. 1... Operation operation circuit, 5... Thermostat,
11... Time limit means (timer), 12... Switching means (relay).

Claims (1)

[Scope of utility model registration request] The operating circuit 1 of the container refrigeration system includes a switching means 12 for changing the set value of a thermostat 5 for regulating the internal temperature, and a switching means 12 for operating the switching means 12 after a predetermined period of time has elapsed since the start of operation of the refrigeration system. 1. A set temperature switching device for a container refrigeration device, characterized in that a time limit means 11 is attached thereto.