JPH05149758A - Temperature recording device - Google Patents

Abstract

PURPOSE:To obtain a temperature recording device which does not give any uneasiness to an operator by recording the temperature as far as a temperature within a chamber is within a set temperature range. CONSTITUTION:In the title item which records a temperature according to a detection result of a temperature-detecting means 10, when a temperature detected by the temperature detection means 10 continues for a specified amount of time and is shifted into a first set temperature range, a predetermined target temperature is recorded. Then, when a temperature which is detected by the temperature detection means 10 exceeded a second set temperature range, control means 21, 22, and 23 which record the temperature detected by the temperature detection means are provided.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a temperature recorder.

[0002]

2. Description of the Related Art For example, as shown in the block diagram of FIG. 3, an amplifier 1 for amplifying a signal from a temperature sensor 10 is conventionally used in an automatic balance type temperature recorder used in a refrigerating apparatus for a marine container. Deviation output from the first changeover switch 6 that performs a switching operation according to the signal of the first changeover circuit 7 so that the output of the amplifier 1 is input to the servo amplifier 2 directly or via the integrating circuit 3, and the servo amplifier 2 And a servo motor 4 for driving a recording pen (not shown), and a potentiometer 5 connected to the servo motor 4 and feeding back a signal indicating the position of the recording pen to the servo amplifier 2. In this temperature recording device, a temperature sensor 10 that detects the temperature inside the refrigerator is used.
Signal is amplified by the amplifier 1 and then directly or through the integration circuit 3
Is sent to the servo amplifier 2 via. Then, the servo amplifier 2 inputs the signal from the amplifier 1 and the feedback signal from the potentiometer 5 indicating the position of the recording pen, outputs a deviation signal, and drives the servo motor 4. 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. Therefore, the recording pen stops at the position indicated by the signal from the servo amplifier 2, and the temperature is recorded on the temperature recording paper by the recording pen.

[0003]

However, in this type of temperature recording apparatus, when the temperature inside the refrigerator fluctuates due to a disturbance such as a change in the external temperature of the freezer, this is detected by the temperature sensor 10 to record the temperature. Since it is recorded in the device, even if the air temperature in the freezer fluctuates within the set temperature range, the temperature of the cooled object in the freezer remains substantially unchanged, but the operator Will give you a sense of useless anxiety.

The present invention has been proposed in view of such circumstances, and as long as the temperature inside the refrigerator is within the set temperature range, the set temperature is recorded to give the driver an uncomfortable feeling. It is an object of the present invention to provide a temperature recording device that does not have a temperature.

[0005]

Therefore, according to the present invention, in a temperature recording apparatus for recording a temperature according to a detection result of a temperature detecting means, the temperature detected by the temperature detecting means is continuously maintained for a predetermined time. When the temperature has transitioned to within the set temperature range, the predetermined target temperature is recorded, and when the temperature detected by the temperature detection means exceeds the second set temperature range, the temperature detection means detects the temperature. It has a control means for recording the temperature.

[0006]

According to this structure, when the temperature inside the refrigerator has continued within the first set temperature range for a predetermined time, the preset target temperature is recorded. After that, if the internal temperature is maintained within the second set temperature range, the target temperature is continuously recorded. As a result, if the temperature inside the refrigerator is maintained within the second set temperature range, even if it fluctuates within the second set temperature range, it is recorded as a constant linear target temperature. On the other hand, when the internal temperature exceeds the second set temperature range, the actual temperature detected by the temperature detecting means is recorded.
As a result, the state in which the temperature inside the refrigerator suddenly changes is accurately recorded.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram thereof, and FIG. 2 is a flow chart of FIG. In the above figure, the same symbols as those in FIG. 3 indicate the same members as those in FIG. 3, and first, in FIG. 1, the signal of the temperature sensor 10 for detecting the temperature inside the refrigerator is input to the controller 21, and this controller 21 is It outputs to the second switching circuit 22 based on the control flow shown in FIG. 2, and the second switching circuit 22 instructs switching of the second switching switch 23 based on a command from the controller 21. A signal from the output means 24 that outputs a signal corresponding to a preset target temperature or a signal that has passed through the amplifier 1 is input to the servo amplifier 2. Other configurations are similar to those of the conventional one shown in FIG.
Corresponding members are designated by the same reference numerals for description.

In such a circuit structure, at the start of recording by the temperature recording apparatus, the second changeover switch 23 is connected to the contact c side according to an instruction from the second changeover circuit 22 which receives a command from the controller 21. The signal from the temperature sensor 10 that has detected the temperature inside the chamber is amplified by the amplifier 1 and then sent to the servo amplifier 2 directly or via the integrating circuit 3, and the actual temperature inside the chamber is recorded on the temperature recording paper. It When the temperature inside the refrigerator is gradually cooled and falls within the first set temperature range, a timer is counted, and the temperature inside the store continuously continues within the first set temperature range for a predetermined time, for example, 30 minutes to reach a stable temperature state. Then, from the controller 21 to the second
A command signal is output to the switching circuit 22 of. Then, the second changeover switch 23 is connected to the contact point d side according to the instruction of the second changeover circuit 22, and the servo amplifier 2 outputs to the output means 24.
The signal from is input and the target temperature is recorded on the temperature recording paper. If the internal temperature exceeds the first set temperature range before the predetermined time has elapsed, the timer count is cleared,
The process waits until the internal temperature reaches the first set temperature range again. Thereafter, if the internal temperature is maintained within the second set temperature range, the target temperature is continuously recorded. As a result, if the temperature inside the refrigerator is maintained within the second set temperature range, even if it fluctuates within the second set temperature range, it is recorded as a constant linear target temperature. Here, the second set temperature range is set as an air temperature range that does not affect the objects to be cooled in the refrigerator (the product temperature does not change), and should be set to the same value as the first set temperature range. You can also On the other hand, if the internal temperature rises or falls beyond the second set temperature range due to disturbance due to changes in the external temperature, the controller 2
A command signal is output from 1 to the second switching circuit 22. Then, the second changeover switch 23 is connected to the contact c side according to the instruction of the second changeover circuit 22, the signal from the amplifier 1 is input to the servo amplifier 2, and the actual temperature inside the refrigerator is displayed on the temperature recording paper. To be recorded.

[0009]

According to such a structure, when the temperature inside the refrigerator changes to the first set temperature range continuously for a predetermined time, the preset target temperature is recorded, and then the temperature inside the refrigerator is changed. If the temperature is maintained within the second set temperature range, the target temperature is continuously recorded. Therefore, even if the inside temperature fluctuates within the second set temperature range due to a disturbance such as a change in the outside temperature, a constant straight line is obtained. It can be recorded at the target temperature, and does not give the driver an uncomfortable feeling. On the other hand, when the inside temperature exceeds the second set temperature range, the actual temperature detected by the temperature detecting means is recorded, so that the state where the inside temperature suddenly changes can be accurately recorded.

In short, according to the present invention, in the temperature recording device for recording the temperature in accordance with the detection result of the temperature detecting means, the temperature detected by the temperature detecting means continues for a predetermined time within the first set temperature range. When the temperature changes to, the predetermined target temperature is recorded, and when the temperature detected by the temperature detecting means exceeds the second set temperature range, the temperature detected by the temperature detecting means is recorded. By providing the control means, as long as the temperature inside the refrigerator is within the set temperature range, the set temperature is recorded so as to obtain a temperature recording device which does not give an uncomfortable feeling to the operator. Is extremely useful in industry.

[Brief description of drawings]

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

FIG. 2 is a control flowchart of FIG.

FIG. 3 is a block diagram showing a configuration of a conventional temperature recording device for a marine container.

[Explanation of symbols]

 1 Amplifier 2 Servo Amplifier 3 Integrating Circuit 4 Servo Motor 5 Potentiometer 6 Controller 7 First Switching Circuit 10 Second Switching Circuit 21 Controller 22 Second Switching Circuit 23 Second Switching Switch 24 Output Means

Claims (1)

[Claims] 1. A temperature recording device for recording a temperature in accordance with a detection result of a temperature detection means, when the temperature detected by the temperature detection means continues within a first set temperature range for a predetermined time. And a control means for recording a predetermined target temperature and recording the temperature detected by the temperature detection means when the temperature detected by the temperature detection means exceeds a second set temperature range. A temperature recording device characterized by the above.