JPH04201813A - Vacuum packing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a vacuum packaging apparatus for bags containing liquid-containing foods, etc.

(Prior Art) In general, foods and liquids are packaged together in a container to maintain their flavor, and by creating a vacuum inside the container, the shelf life is improved. However, when a liquid is subjected to a vacuum effect, it does not boil easily; in particular, as the temperature of the liquid increases, the vacuum value at which the liquid boils decreases accordingly. However, if the liquid boils during packaging, it may stain the container, or the filling may become under-measured due to water coming out.

To deal with these problems, as shown in FIG. 3, the temperature of the bag in the vacuum chamber 2 (i.e., the temperature of the liquid inside the bag) is detected by a temperature sensor 3, and the degree of vacuum is detected by a vacuum sensor 6. Compare the data on the relationship between the boiling temperature of the liquid and the vacuum value, which have been adjusted, with the above-mentioned two side-out values, and when the predetermined vacuum value is reached, the operation of the vacuum pump 4 is stopped to reduce the vacuum in the chamber 2. It is designed to regulate the degree of

(Problems to be Solved by the Invention) As described above, in the conventional method, the temperature of the bag l is detected after it is housed in the vacuum chamber 2. Therefore, in a general vacuum packaging apparatus, a temperature sensor must be installed in each of a large number of vacuum chambers to detect the temperature in each chamber.

That is, as shown in FIG. 2, the bag 1 that has been filled with the filling during steps (1) to (6) while rotating around the rotary table T1 in the packaging machine A is vacuum-wrapped in step (7). The bag 1 is then delivered to the device B, where it is stored in a vacuum chamber 2 and subjected to vacuum treatment while rotating the rotary table Tλ.

However, as shown in the figure, one device is normally equipped with a plurality of vacuum chambers 2 (10 in the figure), and therefore, as many temperature sensors 3 as the number of 20 chambers are required, which increases the equipment cost and expense for temperature detection. The problem is that it is expensive.

(Means for solving the problem) In order to solve the above problem, the present invention provides an electromagnetic switching valve inserted in a vacuum line connecting a vacuum chamber and a vacuum source of the vacuum chamber, and a vacuum switch valve installed in the vacuum chamber. sensor and
A temperature sensor for detecting the temperature of the liquid inside the bag before it is stored in the vacuum chamber, a means for comparing a value detected by the vacuum sensor with a value detected by the temperature sensor, and a means for storing the relationship between the boiling temperature of the liquid and the vacuum value. The apparatus is characterized by comprising means for determining a vacuum value at which the liquid boils in accordance with the output of the comparing means, and command means for issuing an operation signal for the electromagnetic switching valve in accordance with the output of the determining means.

(Function) Since the temperature of the liquid inside the bag is detected before it is stored in the vacuum chamber, one or one bag per vacuum packaging machine can be used.
This problem can be dealt with simply by installing a set of temperature sensors.

(Example) An example of the present invention will be described based on the drawings. Said second
In the packaging machine A shown in the figure, in steps (3) and (4), bag 1 is
After storing the filling in the bag and supplying the liquid in steps (5) and (6), the bag l is delivered to the vacuum packaging device B in step (7), and is stored in the vacuum chamber 2 and vacuum-processed. Ru.

In the above-mentioned vacuum packaging system, the present invention is applicable to the process (7) before the bag 1 is stored in the vacuum chamber 2 of the vacuum packaging device B, that is, after the liquid is supplied in the steps (5) and (6) of the packaging machine A.
), the temperature of the liquid in the bag 1 is detected, and the vacuum value of the vacuum chamber is regulated based on the detected value.

Specifically, the temperature sensor 3 shown in FIG.
before the liquid is supplied to the bag l and stored in the vacuum chamber 2.
It is installed at a position to detect the temperature of the liquid inside. By the way, a vacuum sensor 6 is installed in the vacuum chamber 2 to detect the degree of vacuum at all times or as needed.

Now, when the bag l containing the filler and liquid stored inside comes to steps (6) to (7) of the packaging machine A, the temperature sensor 3 detects the temperature of the bag 1 (temperature inside the bag) and then vacuums the bag. It is sent into the chamber 2. Then, when the vacuum pump 4 is activated and vacuum operation begins, the degree of vacuum within the vacuum chamber 2 is constantly detected by the vacuum sensor 6. The bag internal liquid temperature detection value and the continuously detected vacuum detection value thus obtained are finally sent to comparison means 7 for comparison, and then the results are sent to boiling value determination means 8.

The boiling value determining means 8 stores relational data between the boiling temperature of the liquid and the vacuum and empty values obtained from the previous investigation, and determines whether the liquid Find an appropriate vacuum value for the temperature (i.e., the highest vacuum value just before the liquid boils), and when it is determined that the detected vacuum value has reached the appropriate vacuum value, immediately transmit the result to the command means 9 and issue the same command. The electromagnetic switching valve 5 is operated by a command signal from the means 9 to stop the operation of the vacuum pump 4.

In this way, the vacuum chamber 2 is maintained at the optimal vacuum state just before the liquid in the bag 1 is boiled, so the liquid in the bag 1 does not boil and a good vacuum process can be performed. It will be done.

In addition, the temperature of the liquid when it is supplied into the bag 1 in step (6) of packaging machine A is relatively low at 40 to 50'C, so it is stored in the vacuum chamber 2 through the subsequent step (7). Since the drop in temperature of the liquid until it is vacuum processed is very small, there is almost no error even if the vacuum value of the vacuum chamber 2 is regulated using the detection value detected before the liquid is stored in the vacuum chamber 2. It is capable of maintaining a sufficiently good vacuum state.

(Effects of the Invention) As described above, the present invention detects the temperature of the liquid inside the bag before the bag is stored in the vacuum chamber, so there is no need to provide as many temperature sensors as there are vacuum chambers, unlike in the past. With good vacuum processing, one device can be operated by simply equipping one device with one temperature sensor or one set of temperature sensors, and the cost of equipment and expenses for detecting the temperature of liquid inside the bag can be reduced. This will result in savings.

Additionally, in the past, it was necessary to open the chamber lid to detect the liquid temperature, but with the present invention, the detection is performed outside the vacuum chamber, eliminating the need for that effort and making the detection process simple and efficient. Be able to perform work.

[Brief explanation of the drawing]

FIG. 1 shows the vacuum processing procedure of the vacuum packaging apparatus according to the present invention, FIG. 2 is an overall explanatory diagram of the apparatus, and FIG. 3 shows the vacuum processing procedure of the conventional apparatus. 1... Bag 2... Vacuum chamber 3... Temperature sensor 4... Vacuum pump 5... Solenoid switching valve
6...Vacuum sensor 71...Comparison means 8
...Boiling value determination means patent applicant Toyo Jidoki Co., Ltd. Figure 1 2 & 3 W7A

Claims (1)

[Claims] (1) An electromagnetic switching valve installed in the vacuum line connecting the vacuum chamber and the vacuum source of the vacuum chamber, a vacuum sensor installed in the vacuum chamber, and the temperature of the liquid inside the bag before it is stored in the vacuum chamber are detected. a temperature sensor, a means for comparing a value detected by the vacuum sensor with a value detected by the temperature sensor, and a vacuum in which the relationship between the boiling temperature of the liquid and the vacuum value is stored, and the liquid boils according to the output of the comparison means. A vacuum packaging apparatus comprising: a means for determining a value; and a command means for issuing an operation signal for the electromagnetic switching valve in accordance with the output of the determining means.