JPS6333140Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention performs control to supply a heat source to the load in order to maintain the temperature of the load at a required specified temperature for a certain period of time, records the temperature status of the load, and The present invention relates to a self-recording temperature control device that is capable of responding to a request for temperature guarantee with the record.

For example, when transporting food in refrigerated containers, it is essential that the food undergo continuous temperature treatment necessary for preservation during the transportation period to maintain the desired freshness and not deteriorate. In this method, the temperature inside the refrigerated container is continuously recorded, and the storage status of the food is explained using the record.

By the way, in order for such records to completely answer the request for temperature guarantee for the load, the first step is to accurately control the temperature at the instructed temperature, and the second step is to ensure that the temperature status of the load is accurate. It is necessary that the information be kept and recorded continuously.

In this invention, the accuracy of temperature setting and control is established by adopting an electronic temperature control device, and the continuity of recording is achieved by using a mechanical recorder that incorporates outside temperature compensation into a gas or liquid actuated device. The system is designed to continue recording even when the electronic temperature control device that requires power is inoperative, such as when the power to the refrigerated container is turned off or it malfunctions.

An embodiment of the present invention will be described below with reference to the drawings. In Fig. 1, A is a refrigerated container with a door B on one side, a cooler C with a fan attached inside, and a heat exchanger on the other side. It has an exchanger D, a motor-driven compressor E, temperature control, and a recording section F.

Details of the temperature control and recording section F are shown in FIGS. 2 and 3. The case 1, which has an external mounting leg 1a, has an indicating section 1 provided along the inner wall.
The base 2 is fixed to b by screws 3. 4
is a surface plate fixed to the support member on the base 2 with screws 5.

A tuning fork motor 6 having a starter 6a, a speed reducer 7 interlocked with the tuning fork motor 6, and a battery case 8 are provided on the base 2. The rotating shaft 7a of the reducer 7 faces the hole in the center of the surface plate 4, and the recording paper fixing knob 9 is connected to the rotating shaft 7.
A circular pressure-sensitive recording paper 10 is fixed through its center hole by screwing onto the outer end of a. A support chain 11 is connected to the fixed knob 9.

12 is a pen lever operated by gas or hydraulic pressure and has a ballpoint pen at the tip; 13 is a pen lifting arm; the arm 13 is operated by a lifting shaft 14 having a knob 14a.

Reference numeral 15 denotes a temperature-sensitive cylinder in which a gas adsorbent substance and gas (and liquid) are sealed, and the gas is passed through a thin tube 16
The bellows seat plate 1 of the pen lever drive unit 17
8 and is guided into the sealed interior chamber 19a of the bellows 19. One end surface of the bellows 19 is the bellows seat plate 1
8, and the other end surface of the bellows responds to the pressure in the sealed interior chamber.

A compression spring 20 that mainly counteracts the pressure in the bellows-sealed inner chamber is provided via a U-shaped drive plate 21, and the recording temperature setting screw 22 controls the spring 20.
Adjust the elasticity of 0 and set the accurate recording temperature corresponding to the load.

A lever ratio adjusting screw rod 24 having a piece 23 that comes into contact with the left inner surface of the U-shaped drive plate 21 is provided passing through the inside of the drive plate, and the pen lever 12 is moved by a fulcrum plate 25a fixed to the housing 25 at a fulcrum 12a. The pen lever 12 is supported without contacting the drive plate 21, and a portion of the pen lever 12 is screwed onto a lever ratio adjusting screw rod 24. Pen lever has tension spring 26
As a result, a counterclockwise force is applied about the fulcrum 12a, and the piece 23 always comes into contact with the left inner surface of the drive plate.

Since the temperature-sensing tube 15 is filled with a gas-adsorbing object and gas, the gas-adsorbing property of the object changes depending on the temperature. By changing the object and the amount of gas sealed, it is possible to create an arbitrary temperature-pressure change, and since there is little effect on ambient changes other than the temperature-sensing part, the measurement temperature range is wide and the temperature of the temperature-sensing part can be accurately indicated. can do.

When the elasticity of the compression spring 20 is adjusted by the setting screw 22 and the sum of the elasticity with the tension spring 26 is balanced with the pressure in the bellows-sealed chamber corresponding to the set temperature, the pen lever 12 will remain in the neutral position and will not move forward. When the temperature of the temperature sensor increases and the pressure in the bellows-sealed interior overcomes the sum of the elasticities of the springs 20 and 26, the pen lever 12 rotates clockwise in accordance with the amount of change, and in the opposite case, it rotates counterclockwise. Rotate to.

27 is a terminal board in the electronic control circuit, 28 is a relay board, and 29 is a volume as a temperature setting body in the circuit.

A shaft 29a that changes the resistance value of the volume 29 by its rotation is provided protruding through a bearing 29c fixed to the volume mounting base 29b, and a pointer 29e of the main setting knob 29d that rotates together with the shaft is attached. Board 2
A scale engraved on the scale plate 29f on a is rotatably provided so as to be able to freely indicate the scale, and the volume 2
9. The mounting base 29b and the main setting knob 29d are integrally provided with means for freely rotating about the volume axis with respect to the mounting plate 2a.
The set screw 29g fixes the shaft 29a and the main setting knob 29d, and the control temperature fine adjustment screw 29h fixes the shaft 29a and the main setting knob 29d.
arcuate groove 2a ₁ provided on the mounting plate 2a
This serves as a handle that allows the mounting base 29b to rotate around the shaft 29a while slidingly contacting the mounting plate 2a, and also serves as a set screw that fixes the mounting base 29b to the mounting plate 2a at the set position. Further, the protrusion 29i provided on the outer plate of the volume 29 fits into the recessed hole provided in the mounting base 29b, and the volume 29 is attached to the mounting base 29b.
Rotate together with 9b.

In the above configuration, for example, when maintaining the temperature at 10°C, the pointer 2 of the main setting knob 29d of the volume 29
9e is set to a scale of 10°C, but if the control value measured by another thermometer of the controlled load shows 9°C, causing an error, set the control device's instruction to 9°C of the load. To match, use fine adjustment screw 29
When loosening the tension of h and rotating the mounting base 29b, the volume 29 and the main setting knob 29d rotate together with the mounting base 29b, moving the pointer 29e to the scale plate 29f.
Adjust the fine adjustment screw 29 to the position according to the scale of 9℃.
By fixing it to the mounting plate 2 with h, only the indicated value can be adjusted to 9℃ without changing the resistance value of the volume.
It is possible to match the commanded value of the control device with the measured value of the controlled load.

30 is an operation indicator lamp of the temperature control device;
Each lamp 30a, 30 indicates appropriate temperature, defrost, etc.
At the same time, the lamp 30 is configured to be turned off if the temperature sensor circuit in the electronic control circuit is disconnected or shot, and also serves as an indicator.

31 is a voltmeter for the power supply battery of the motor 6, and 32 is a window for checking the rotational operation of the motor, which is provided in the surface plate 4.

All of the above-mentioned components are provided on the base 2, and can be taken out of the case 1 as a whole by removing the screws 3 after removing the surface plate 4 at the time of repair.

As described above, the present invention consists of an electronic temperature control means for a load, a mechanical recording means that responds to the pressure from a temperature sensing tube installed on the load and has an outside temperature compensation means, and an electronic temperature control means. In order to match the indicated value of the control means with the measured value of the controlled load, the entire temperature setting body such as a volume in the electronic temperature control means is configured to be movable for fine adjustment with respect to the scale on the mounting plate. Since the electronic temperature control means can accurately control the temperature of the load, since the recording means is mechanical, sufficient power can be obtained and recording can be performed reliably. At the same time, even if the electronic temperature control means becomes inoperable due to a power outage, etc., continuity of temperature recording can be maintained, and the indicated value of the electronic temperature control means and the measured value of the controlled load can be maintained. Since the discrepancy can be easily adjusted, the temperature of the load can be accurately controlled based on the set temperature, and this can be confirmed and recorded as is by a mechanical recording means.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the use of the device according to the present invention, Fig. 2 is a plan view of one embodiment, Fig. 3 is a side view of the same, and Fig. 4 is a cross-sectional view of the pen lever drive section. FIG. 5 is a detailed view showing the control temperature setting section longitudinally. 12...Pen lever, 15...Temperature tube, 27...
...Terminal board for electronic control circuits.

Claims (1)

[Scope of utility model registration request] It consists of an electronic temperature control means for the load, and a mechanical recording means that responds to the pressure from a temperature sensing cylinder installed on the load and has an outside temperature compensation means, and records the indicated value of the electronic temperature control means and the controlled object. In order to match the measured value of the load, the electronic temperature control means has an adjustment means configured to be able to finely adjust and move the entire temperature setting body such as a volume with respect to a scale on the mounting plate. Self-recording temperature control device.