JP2000146822A - Constant temperature and constant humidity device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To regularly record a correct temperature in a recorder by interrupting and continuing the connecting passage of a dry and wet ball sensor through a relay circuit. SOLUTION: When the set is changed from humidity test to temperature test by a program setting circuit 10, a relay interrupting circuit 13 is driven simultaneously thereto, and the output signal is transmitted to a relay circuit 12 to interrupt the connecting passage for a wet ball sensor 4 to a recorder 11. When the set is then changed from the temperature test to the humidity test, the output signal of the program setting circuit 10 is transmitted to a humidity control circuit 9 and the relay interrupting circuit 13. At this time, since the relay interrupting circuit 13 is laid in the state generating no output signal when driven by a new output signal, the relay circuit 12 is not driven, and the wet ball sensor 4 is laid in the state connected to the recorder 11. Accordingly, only the dry ball temperature is recorded in the recorder 11 only at the time of the temperature test.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermo-hygrostat for operating from a humidity test state to a temperature test state.

[0002]

2. Description of the Related Art When a temperature test is performed continuously from the operating state of a humidity test, the wick covering the wet bulb sensor for detecting humidity is still wet, so the temperature value between the wick and the dry bulb sensor is still low. The recorder was apparently subjected to a humidity test.

The dry-bulb sensor and the wet-bulb sensor are separately connected to recorder terminals, respectively, and have a structure in which recording is performed by a temperature pen and a humidity pen.

FIG. 6 shows a block diagram of a conventional constant temperature and humidity apparatus. 1 is a dry-bulb sensor for detecting the temperature in the bath, 2 is a heater, 3 is a temperature control circuit for setting an arbitrary temperature and generating a control signal for maintaining the set temperature, and 4 is a temperature between the dry-bulb. A wet-bulb sensor for detecting a difference, 5 is a wick covering the wet-bulb sensor 4, 6 is a wet-bulb pot for moistening the wick 5, 7 is a humidifier, 8 is a wet-bulb pot 6 and a humidifier 7 9 is a humidity control circuit for generating a control signal for maintaining a set humidity, 10 is a program setting circuit for setting a temperature / humidity test cycle operation, and 11 is a tank. Is a recorder for recording a dry bulb temperature value and a wet bulb temperature value, respectively.

The configuration of the conventional constant temperature and humidity apparatus is as described above, and the operation will be described next. First, when a temperature test is set after the humidity test by the program setting circuit 10 and the program is started, the temperature control circuit 3 and the humidity control circuit 9 operate simultaneously. The dry-bulb sensor 1 that detects the temperature in the bath converts the temperature value into a detection signal, sends the signal to the recorder 11, and sends the signal to the temperature control circuit 3 at the same time. Therefore, the temperature control circuit 3 continuously generates a control signal based on the potential difference between the temperature set value signal voltage generated by the temperature setting and the detection signal voltage from the dry-bulb sensor 1 until the heater 2 is heated. Let it. When the detection signal voltage becomes equal to the temperature set value signal voltage, the potential difference disappears and no control signal is generated, so that the heater 2 is not heated, and the set temperature is maintained by repeating this.

On the other hand, the humidity control circuit 9 activates the water supply / drain circuit 8 at the same time as it operates, supplies water to the wet bulb pot 6 and the humidifier 7, and receives a detection signal from the wet bulb sensor 4. The control signal is continuously generated until the humidifier 7 is humidified until it becomes equal to the humidity set value signal voltage generated by the humidity setting. When the detection signal voltage from the wet bulb sensor 4 becomes equal to the humidity set value signal voltage, the humidifier 7 is not humidified because there is no potential difference and no control signal is generated. is there. The value of humidity is positioned by the degree of the temperature difference below the dry bulb temperature. That is, when the temperature in the tank rises, the temperature of the wet-bulb sensor 4 covered by the wick 5 is lower than the dry-bulb temperature due to the heat of vaporization when the moisture of the wick 5 moistened by the wet-bulb pot 6 evaporates. Make a difference. Humidity is determined by the degree of the temperature difference (relative humidity). Accordingly, the recorder 11 records the temperature values for the dry bulb and the wet bulb that have a temperature difference.

Next, when the setting is changed from the humidity test to the temperature test by the program setting circuit 10, only the temperature setting circuit 3 operates and the humidity control circuit 9 does not operate. For this reason
The drain circuit 8 is not driven and drains water from the wet bulb pot 6 and the humidifier 7. The temperature setting circuit 3 maintains the set temperature by heating the heater 2 according to the control signal according to the above description of the operation, but the recorder 11 records the wet bulb temperature value as well as the dry bulb temperature value.

Therefore, in the conventional constant temperature and humidity apparatus, when only the temperature test or the temperature test is continuously performed, there is no temperature difference because the wick 5 covering the wet bulb sensor 4 is dry. Since the same temperature value as that of the dry-bulb sensor 1 is detected, the temperature is recorded on the recorder 11 on the same line. However, when the temperature test is performed after the humidity test, although the water in the wet bulb pot 6 is drained, the wick 5 is still damp, so that a difference occurs in the recorder 11 until the wick 5 is completely dried. Both temperature values are recorded. For this reason, although the apparent wet-bulb temperature value is recorded in the recorder 11 despite the temperature test being performed, there is a factor that causes a misunderstanding that the humidity test is being performed.

[0009]

In a conventional thermo-hygrostat, a dry-bulb sensor 1 and a wet-bulb sensor 4 are separately connected to recorder terminals, and both temperature values are measured in a temperature test. Was recorded.

The present invention has been made in order to solve such a problem. When the humidity test is changed to a temperature test, the connection path of the wet-bulb sensor is cut off via a relay circuit or the dry-bulb sensor is disconnected. By connecting the sensor and the wet-bulb sensor, the temperature values of only the dry-bulb sensor or both are deliberately matched, and the recorder always records a temperature value having no difference.

[0011]

According to a first aspect of the present invention, a thermo-hygrostat is provided with a relay cutoff circuit and a relay circuit for cutting off a connection path between a wet bulb sensor and a recorder when a temperature test is performed. It is a thing.

According to the second invention, the constant temperature and humidity apparatus is provided with a relay circuit for cutting off a connection path between the wet bulb sensor and the recorder by a humidity control circuit when a temperature test is performed.

According to the third aspect of the invention, the constant temperature and humidity apparatus is provided with a relay connection circuit for connecting the dry bulb sensor and the wet bulb sensor by a humidity control circuit when a temperature test is performed.

According to the fourth aspect of the present invention, the constant temperature and humidity apparatus cuts off the connection path between the wet bulb sensor and the recorder when a difference occurs in the temperature value between the dry bulb and the wet bulb in the temperature test. And a relay circuit.

According to a fifth aspect of the present invention, there is provided a thermo-hygrostat for controlling a temperature of a dry bulb sensor and a wet bulb sensor when a temperature difference between a dry bulb and a wet bulb occurs in a temperature test. A comparison circuit and a relay connection circuit are provided.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram of a constant temperature and humidity apparatus showing a first embodiment of the present invention. 1 to 11 in the figure are the same as those in FIG. 12
Is a relay circuit, and 13 is a relay cutoff circuit. Now, when the setting is changed from the humidity test to the temperature test by the program setting circuit 10, the output signal of the program setting circuit 10 drives the relay cutoff circuit 13 simultaneously with the temperature control circuit 3. When the relay cutoff circuit 13 is driven, it generates an output signal and sends it to the relay circuit 12. When the relay cutoff circuit 13 is driven, the relay circuit 12 is driven to cut off the connection path between the wet bulb sensor 4 and the recorder 11. Next, when the setting changes from the temperature test to the humidity test, the output signal of the program setting circuit 10 is sent to the humidity control circuit 9 and the relay cutoff circuit 13 at the same time. At this time, the relay cutoff circuit 1
When 3 is driven by a new output signal, no output signal is generated, so that the relay circuit 12 is not driven, and the wet bulb sensor 4 is connected to the recorder 11. Therefore, only at the time of the temperature test, the recorder 11 records only the dry-bulb temperature value.

Embodiment 2 FIG. FIG. 2 is a block diagram of a constant temperature and humidity apparatus according to a second embodiment of the present invention. 1 to 11 in the figure are the same as those in FIG. 12 is a relay circuit. When the temperature test is being performed, the humidity control circuit 9 is operating as described above. At this time, the humidity control circuit 9 sends an output signal to the water supply / drain circuit 8 and the humidifier 7 and also sends an output signal to the relay circuit 12. The relay circuit 12 receives this and drives to connect the wet bulb sensor 4 and the recorder 11. Now, the program setting circuit 1
When the setting is changed from the humidity test to the temperature test by 0, only the temperature control circuit 3 is operated and when the humidity control circuit 9 is not operated, no output signal is generated from the humidity control circuit 9 so that the relay circuit 12 is not driven and the wet bulb is not operated. The connection path between the sensor 4 and the recorder 11 is cut off. Next, when the setting is changed from the temperature test to the humidity test by the program setting circuit 10, the humidity control circuit 9 is activated, so that the relay circuit 12 is driven and the wet bulb sensor 4 is connected to the recorder 11. Therefore, in the repeated continuous operation of the temperature test and the humidity test, only the dry-bulb temperature value is automatically recorded in the recorder 11 during the temperature test, and the dry-bulb temperature value and the wet-bulb temperature value are automatically recorded in the humidity test. Will go.

Embodiment 3 FIG. 3 is a block diagram of a constant temperature and humidity apparatus according to a third embodiment of the present invention. 1 to 11 in the figure are the same as those in FIG. 14 is a relay connection circuit. When the humidity test is being performed, the humidity control circuit 9 is operating as described above. At this time, the humidity control circuit 9 sends an output signal to the supply / drain circuit 8 and the humidifier 7 and also sends an output signal to the relay connection circuit 14 at the same time. When the relay connection circuit 14 is driven in response to this, the wet bulb sensor 4 and the dry bulb sensor 1 included in the relay connection circuit 14 are cut off. Now, the program setting circuit 1
When the setting changes from the humidity test to the temperature test due to 0, only the temperature control circuit 3 operates and the humidity control circuit 9 does not operate, and no output signal is generated from the humidity control circuit 9.
Therefore, the relay connection circuit 14 is not driven, and the wet bulb sensor 4 and the dry bulb sensor 1 are connected to each other and sent to the recorder 11. Next, when the setting is changed from the temperature test to the humidity test by the program setting circuit 10, the humidity control circuit 9 is changed.
Is activated, the relay connection circuit 14 is driven, the wet bulb sensor 4 and the dry bulb sensor 1 are cut off, and both signals are sent to the recorder 11 by the conventional operation. Accordingly, in the continuous continuous operation of the temperature test and the humidity test, since the two sensors 1 and 4 are connected during the temperature test, the recorder 11
, Temperature values are recorded on the same line, and in the case of a humidity test, since both sensors 1 and 4 are shut off, the respective temperature values are recorded on the recorder 11, and this is repeated. .

Embodiment 4 FIG. 4 is a block diagram of a constant-temperature and constant-humidity device according to a fourth embodiment of the present invention. 1 to 11 in the figure are the same as those in FIG. 12 is a relay circuit, and 15 is a temperature comparison circuit. Temperature comparison circuit 15
Does not operate when an output signal from the humidity control circuit 9 is received, and operates when there is no output signal. Now
When the setting is changed from the humidity test to the temperature test by the program setting circuit 10, only the temperature control circuit 3 is operated and the humidity control circuit 9 is not operated, so that the temperature comparison circuit 15 is operating. The temperature comparing circuit 15 compares the temperature values from the dry-bulb sensor 1 and the wet-bulb sensor 4 and generates an output signal only when there is a difference, drives the relay circuit 12 to drive the wet-bulb sensor 4 and the recorder 11. To cut off the connection path. Therefore, when the temperature comparison circuit 15 is operated only during the temperature test and a difference occurs between the temperature values of the dry bulb and the wet bulb, the connection path between the wet bulb sensor 4 and the recorder 11 is cut off and the dry bulb is connected. The temperature value of only the sensor 1 is recorded.

Embodiment 5 FIG. 5 is a block diagram of a constant temperature and humidity apparatus according to a fifth embodiment of the present invention. 1 to 11 in the figure are the same as those in FIG. 14 is a relay connection circuit, and 15 is a temperature comparison circuit. Temperature comparison circuit 1
5 does not operate when an output signal from the humidity control circuit 9 is received, and operates when there is no output signal. Now
When the setting is changed from the humidity test to the temperature test by the program setting circuit 10, only the temperature control circuit 3 is operated and the humidity control circuit 9 is not operated, so that the temperature comparison circuit 15 is operating. The temperature comparison circuit 15 compares the temperature values from the dry-bulb sensor 1 and the wet-bulb sensor 4 and generates an output signal only when there is a difference, and the relay connection circuit 1
4 is driven to connect the dry-bulb sensor 1 and the wet-bulb sensor 4 in the relay connection circuit 14. Therefore, when the temperature comparison circuit 15 is operated only during the temperature test and a difference occurs between the temperature value of the dry bulb and the temperature value of the wet bulb, both the sensors are connected, and the recorder 11 displays the temperature value on the same line. Be recorded.

[0021]

According to the first invention, when a temperature test is performed from a humidity test, the connection path between the wet bulb sensor and the recorder is cut off by the relay cutoff circuit and the relay circuit. It can be recorded on a recorder.

According to the second aspect of the invention, when the temperature test or the continuous operation is repeated from the humidity test, the connection path between the wet bulb sensor and the recorder is cut off by the relay circuit only in the temperature test state. Only the dry bulb temperature values can be recorded on a recorder.

According to the third aspect of the invention, when the temperature test or the continuous operation is repeatedly performed from the humidity test, the wet-bulb sensor and the dry-bulb sensor are connected by the relay connection circuit only in the temperature test state. The meter can record the dry bulb temperature value and the wet bulb temperature value on the same line.

According to the fourth aspect of the present invention, when performing a temperature test or a repeated continuous operation from a humidity test, the temperature values from the wet-bulb sensor and the dry-bulb sensor are determined by the temperature comparison circuit only in the temperature test state. If a difference is generated, the connection path between the wet bulb sensor and the recorder is cut off, so that only the dry bulb temperature value can be recorded on the recorder.

According to the fifth aspect of the present invention, when performing a temperature test or a repeated continuous operation from a humidity test, the temperature value from the wet-bulb sensor and the dry-bulb sensor is determined by the temperature comparison circuit only in the temperature test state. Since the two sensors are connected when a difference is generated, the recorder can record the dry bulb temperature value and the wet bulb temperature value on the same line.

[Brief description of the drawings]

FIG. 1 is a block diagram of a thermo-hygrostat, showing Embodiment 1 of the present invention.

FIG. 2 is a block diagram of a constant temperature and humidity apparatus showing a second embodiment of the present invention.

FIG. 3 is a block diagram of a constant temperature and humidity apparatus showing a third embodiment of the present invention.

FIG. 4 is a block diagram of a thermo-hygrostat, showing Embodiment 4 of the present invention.

FIG. 5 is a block diagram of a thermo-hygrostat, showing Embodiment 5 of the present invention.

FIG. 6 is a block diagram of a conventional thermo-hygrostat.

[Explanation of symbols]

1 dry ball sensor, 2 heater, 3 temperature control circuit,
4 Wet bulb sensor, 5 wick, 6 wet bulb pot,
7 Humidifier, 8 Supply / drain circuit, 9 Humidity control circuit, 1
0 program setting circuit, 11 recorder, 12 relay circuit, 13 relay cutoff circuit, 14 relay connection circuit,
15 Temperature comparison circuit.

Claims (5)

[Claims] 1. A heater for heating the inside of a tank, a sensor for a dry bulb detecting the temperature in the tank, a temperature control circuit for controlling the temperature in the tank based on an output signal from the sensor for the dry bulb, and a tank. A humidifier for humidifying the inside, a wick moistened by a wet bulb pot, a wet bulb sensor for detecting the humidity in the tank, and a humidity control for controlling the humidity in the tank by an output signal from the wet bulb sensor. Circuit, a recorder for recording a temperature value and a humidity value according to output signals of the dry-bulb sensor and the wet-bulb sensor, and a program setting circuit for setting a cycle operation of the temperature / humidity test. In the device, when a humidity test is changed from a humidity test to a temperature test by the program setting circuit, a relay cutoff circuit driven by an output signal from the program setting circuit and the relay cutoff circuit And a relay circuit for interrupting a connection path between the wet bulb sensor and the recorder by an output signal of the constant temperature and humidity controller. 2. A heater for heating the inside of the bath, a dry-bulb sensor for detecting the temperature in the bath, a temperature control circuit for controlling the temperature in the bath based on an output signal from the dry-ball sensor, and a bath. A humidifier for humidifying the inside, a wick moistened by a wet bulb pot, a wet bulb sensor for detecting the humidity in the tank, and a humidity control for controlling the humidity in the tank by an output signal from the wet bulb sensor. Circuit, a recorder for recording a temperature value and a humidity value according to output signals of the dry-bulb sensor and the wet-bulb sensor, and a program setting circuit for setting a cycle operation of the temperature / humidity test. A constant-temperature and constant-humidity device, comprising: a relay circuit for interrupting or connecting a connection path between the wet-bulb sensor and the recorder with an output signal from the humidity control circuit. 3. A heater for heating the inside of the tank, a sensor for the dry bulb for detecting the temperature in the tank, a temperature control circuit for controlling the temperature in the tank based on an output signal from the sensor for the dry bulb, and a tank. A humidifier for humidifying the inside, a wick moistened by a wet bulb pot, a wet bulb sensor for detecting the humidity in the tank, and a humidity control for controlling the humidity in the tank by an output signal from the wet bulb sensor. Circuit, a recorder for recording a temperature value and a humidity value according to output signals of the dry-bulb sensor and the wet-bulb sensor, and a program setting circuit for setting a cycle operation of the temperature / humidity test. In the device, in the case of a humidity test, the dry-bulb sensor and the wet-bulb sensor are cut off by an output signal from the humidity control circuit, and in the case of a temperature test, the two sensors are connected. A thermo-hygrostat equipped with a Ray connection circuit. 4. A heater for heating the inside of the tank, a sensor for the dry bulb detecting the temperature in the tank, a temperature control circuit for controlling the temperature in the tank based on an output signal from the sensor for the dry bulb, and a tank. A humidifier for humidifying the inside, a wick moistened by a wet bulb pot, a wet bulb sensor for detecting the humidity in the tank, and a humidity control for controlling the humidity in the tank by an output signal from the wet bulb sensor. Circuit, a recorder for recording a temperature value and a humidity value according to output signals of the dry-bulb sensor and the wet-bulb sensor, and a program setting circuit for setting a cycle operation of the temperature / humidity test. In the device, in the case of a temperature test, the respective temperature values are compared based on the output signals from the dry bulb sensor and the wet bulb sensor, and a temperature comparison circuit that generates an output signal only when a difference occurs is provided. A constant-temperature and constant-humidity device including a relay circuit that cuts off a connection path between the wet-bulb sensor and the recorder by an output signal from the temperature comparison circuit. 5. A heater for heating the inside of the tank, a sensor for the dry bulb detecting the temperature in the tank, a temperature control circuit for controlling the temperature in the tank based on an output signal from the sensor for the dry ball, and a tank. A humidifier for humidifying the inside, a wick moistened by a wet bulb pot, a wet bulb sensor for detecting the humidity in the tank, and a humidity control for controlling the humidity in the tank by an output signal from the wet bulb sensor. Circuit, a recorder for recording a temperature value and a humidity value according to output signals of the dry-bulb sensor and the wet-bulb sensor, and a program setting circuit for setting a cycle operation of the temperature / humidity test. In the case of a temperature test, the apparatus compares the respective temperature values with the output signals of the dry-bulb sensor and the wet-bulb sensor and generates an output signal only when a difference occurs. A constant-temperature and constant-humidity device having a relay connection circuit for connecting a dry-bulb sensor and a wet-bulb sensor according to an output signal from a road.