JP2524851Y2 - Refrigeration container temperature recorder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature recording device for a freezing container.

[0002]

2. Description of the Related Art In a refrigerating apparatus for a marine container or the like, the temperature recording apparatus is conventionally constituted by a circuit as shown in FIG. That is, the temperature recording device switches the amplifier 1 in accordance with the signal of the switching circuit 7 so that the output of the amplifier 1 is input to the servo amplifier 2 directly or through the integration circuit 3. And a servo motor 4 which is supplied with a deviation output from the servo amplifier 2 and drives a recording pen (not shown).
And a potentiometer 5 connected to the servomotor 4 and feeding back a signal indicating the position of the recording pen to the servo amplifier 2. The signal of the temperature sensor 10 that has detected the temperature in the refrigerator by such a circuit is amplified by the amplifier 1 and then sent to the servo amplifier 2 directly or via the integration circuit 3, and the servo amplifier 2 receives the signal from the amplifier 1. And potentiometer 5 indicating the position of the recording pen
The servo motor 4 is driven by inputting a feedback signal from the controller and outputting a deviation signal. When the recording pen is driven by the servo motor 4 and moves to the position indicated by the deviation signal of the servo amplifier 2, the deviation output of the servo amplifier 2 becomes zero, and the recording pen stops at the position indicated by the signal of the servo amplifier 2. The temperature is recorded on the temperature recording paper by the recording pen. Further, the temperature recording paper is run at a rate of, for example, one rotation per month via a quartz clock (not shown). The quartz timepiece is driven by a dry cell such as an AA battery.

[0003]

However, in this type of temperature recording device, since the quartz clock is driven by using the dry battery as a power source, the dry battery has a short service life, and it must be replaced frequently. Further, there is a problem that the temperature recording device cannot be used unless spare batteries are always reserved. Furthermore, since the quartz clock is driven by a dry battery separately from the driving power supply of the refrigeration apparatus, the quartz clock is driven even when the operation of the refrigeration apparatus is stopped, and there is a disadvantage that the life of the dry battery is further shortened.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a compact and economical temperature recording apparatus for a freezing container which does not require replacement of a dry cell and a dry cell.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a temperature recording apparatus provided in a refrigerating apparatus having a data logger operated by using a battery as a power source and driving a quartz clock to move a temperature recording sheet. while a driving power source of the quartz watch, the power supply for driving the refrigeration system when on driving the quartz watch by the power supply, when the power for driving the refrigerating apparatus is off the quartz by the battery Switching means for driving a timepiece is provided.

[0006]

According to such a configuration, the quartz watch is driven by the battery as its power source and the recording paper runs, so that
Eliminates the need for batteries to drive the quartz watch. When the power supply for driving the refrigeration apparatus is turned on, the quartz clock is driven by this power supply, and when the power supply for driving the refrigeration apparatus is turned off, the quartz clock is driven by the battery. Thus, when the refrigerating apparatus is in operation, the quartz clock is driven by the power source for driving the refrigerating apparatus, and the life of the battery is prolonged.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall circuit diagram. In the above figure, 21
Is a power source for commercial use or the like.
Is driven. A battery 23 monitors the operation of the refrigerating device 22, activates a data logger 24 for recording the data, and drives a quartz clock 25 for running the temperature recording paper. Reference numeral 30 denotes a DC converter, which converts a commercial AC power supply 21 into a DC power supply and supplies the DC power supply to the charging device 26 and the changeover switch 28. Here, the battery 23 may be of a rechargeable type, and may be charged via the charging device 26 as appropriate. 27 is a main switch for operating the refrigerating device 22, 28 is a switch for switching between the power source 21 and the battery 23, and 29 is a controller for switching the changeover switch 28 by inputting an ON / OFF signal of the main switch 27. Has become. In such a structure, the main switch 27 is turned off and the refrigeration system 2
When 2 stops, this signal is input to the controller 29, and the changeover switch 28 is connected to the contact a based on a command from the controller 29. As a result, the quartz clock 25 is driven using the battery 23 as its power source, and the temperature recording paper runs. On the other hand, the main switch 27 is ON
When the refrigerating device 22 is operated in this state, this signal is input to the controller 29, and the changeover switch 28 is connected to the contact b based on a command from the controller 29. Thus, the quartz clock 25 is driven by the power supply 21 and the temperature recording paper runs. Thus, the quartz clock 25 is driven by the battery 23, so that a dry battery is not required. In addition, when the refrigerating device 22 is in operation, the quartz clock 25 is driven by the power source 21 for driving the refrigerating device 22, and 23 is extended. Note that the quartz clock 25 is
When the battery 23 is driven, the use time of the battery 23 can be limited by a timer or the like to prevent the battery 23 from being over-discharged.

[0008]

According to the present invention, the following effects can be obtained. According to the configuration described in claim 1, the quartz timepiece is driven using a battery, which is a power supply for operating a data logger that monitors the operation of the refrigerating apparatus and records the data, so that a dry battery is not required. In addition, the time and labor for the replacement operation can be omitted, and the temperature recording device can be made compact.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a conventional freezer container temperature recording device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Power supply 22 Refrigerator 23 Battery 24 Data logger 25 Quartz clock 26 Charging device 27 Main switch 28 Changeover switch 29 Controller 30 DC converter

Claims (1)

(57) [Scope of request for utility model registration] 1. A temperature recording device battery to drive the equipped with quartz watch refrigeration system including a data logger that operates as a power source to move the temperature recording sheet, the battery and the power drive of the quartz watch result With
In, that the power for driving the refrigeration system when on driving the quartz watch by the power source, the power source for driving the refrigeration system is off provided with switching means for driving the same quartz watch by the battery A temperature recording device for a refrigeration container.