JPH0653B2 - Powdered food sterilizer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a powdered food product sterilizer for sterilizing powdered food products such as spices, rice flour and buckwheat flour.

Structure of the prior art and its problems Regarding powdered food products such as spices, rice flour, and buckwheat flour, sterilization by heat treatment is not preferable because the quality is inevitably impaired. Therefore, it is necessary to sterilize the powdered food product by a method other than heat treatment.
So far, there is nothing that can effectively sterilize powdered food products, and there has been a demand for development of the device.

Therefore, the present invention has been made for the purpose of effectively sterilizing a powdered food product and completely killing its microorganisms without heat treatment.

According to the present invention, the compressed air supply source is connected to the high pressure tank, the high pressure tank is filled with the powdered food product, and the compressed air is supplied to the high pressure tank after the powdered food product is filled. A high pressure is generated at. Furthermore, the low-pressure tank is connected to the high-pressure tank, and the on-off valve is provided between the high-pressure tank and the low-pressure tank. After the compressed air is supplied, the high-pressure tank and the low-pressure tank communicate momentarily, and the high pressure of the high-pressure tank is suddenly released. To be done.

Description of Embodiments Hereinafter, embodiments of the present invention will be described.

In Fig. 1, this device is for sterilizing powdered food products such as spices, rice flour, buckwheat flour, etc.
And a hopper (2), and the hopper (2) is arranged above the high-pressure tank (1). Furthermore, an introduction pipe (3) is provided at the upper end of the high-pressure tank (1), and the introduction pipe (3) has a feed screw (4) and is connected to a hopper (2).
(4) is connected to the motor (5). Therefore, when the powdered food product is put into the hopper (2) and the feed screw (4) is driven by the motor (5) and rotated, the powdered food product is guided along the introduction pipe (3). It is sent and introduced into the high-pressure tank (1), and the high-pressure tank (1) is filled with powdered food products. In addition, an on-off valve (6) for the introduction pipe (3) is provided, and after the powdered food is filled, the on-off valve is opened by a solenoid or an air cylinder.
(6) is closed and the introduction pipe (3) is shut off.

Further, a compressed air supply source is connected to the high pressure tank (1). The compressed supply source is of the type that supplies compressed air over three stages, the primary and secondary air accumulators.
Comprised of (7), (8) and high pressure plunger pump (9), the air accumulators (7), (8) are connected to the solenoid valves (10), (11), (12) and the high pressure tank (1). There is. The high pressure plunger pump (9) is connected to the solenoid valve (13) and is connected to the solenoid valve (12) and the high pressure tank (1). Regarding the air accumulators (7) and (8), the piston pumps (14) and (15)
Is connected to the air accumulators (7) and (8), compressed air is supplied by the piston pumps (14) and (15), and the compressed air is stored in the air accumulators (7) and (8). . 30) kg / cm ^{2 to} 50 kg / for the primary air accumulator (7)
cm ² of compressed air is stored, secondary air accumulator (8)
Compressed air 100kg / cm ² ~150kg / cm ² is stored in the. On the other hand, the high pressure plunger pump (9) is 250 kg / cm ²
Compressed air of ~ 300 kg / cm ² can be supplied.
Further, in this embodiment, the air accumulators (7), (8) and the drain pipe (18) are connected by the solenoid valves (16), (17). The solenoid valves (16), (17) and the drain pipe (18) are for discharging water droplets generated in the air accumulators (7), (8).

Further, the low pressure tank (19) is arranged below the high pressure tank (1), and the high pressure tank (1) and the low pressure tank (19) are provided through the passage (20).
Are connected, and the high-pressure tank (1) is fixed and supported by the low-pressure tank (19). Further, an opening / closing valve (21) is provided in the passage (20) between the high pressure tank (1) and the low pressure tank (19), and the passage (20) is blocked by the opening / closing valve (21). The on-off valve (21) is a two-stage type, and the main valve (22) and the auxiliary valve (2
3), the main valve (22) has a cylindrical shape and is arranged concentrically with the passage (20), the auxiliary valve (23) is inserted into the main valve (22) and connected to the hydraulic cylinder (24). ing. In addition, four brackets (25) are provided around the hydraulic cylinder (24),
The hydraulic cylinders (2
4) is attached to and supported by the bracket (25), and the bracket (25) is fixed to the low pressure tank (19). The hydraulic cylinder (24) is for operating the on-off valve (21) and is a solenoid valve.
It is connected to (26).

Low pressure tank (19) has solenoid valve (27) and piston pump (14)
The low-pressure tank (19) is evacuated by the piston pump (14), and the low-pressure tank (19) is maintained at a low pressure below atmospheric pressure.

Further, the hollow member (28) is spherically arranged below the low pressure tank (19), the lower end of the low pressure tank (19) is connected to the hollow member (28), and the low pressure tank (19) is a hollow member (28). ) Fixed and supported. The hollow member (28) is for discharging the powdered food product and has a ball valve (29). Ball valve (2
9) has a cylindrical passageway (30) formed therein and can be rotated about a horizontal axis (31).

In this device, when the powdered food product is introduced into the high-pressure tank (1) and the high-pressure tank (1) is completely filled, the motor (5) and the feed screw (4) are operated by an operation button or an automatic control device. Stopped and the introduction pipe (3) by means of the on-off valve (6)
Is cut off. Then, compressed air is supplied to the high-pressure tank (1), and high pressure is generated in the high-pressure tank (1). In this embodiment, first, the solenoid valves (10) and (12) are opened by the operation button or the automatic control device, compressed air is supplied by the primary air accumulator (7), and the high pressure tank (1) is supplied. Primary pressure occurs. The primary pressure is 30 kg / cm ^{2 to} 50 kg / cm ² . Then, the solenoid valve (1
(0) is closed, the solenoid valve (11) is opened, compressed air is supplied by the secondary air accumulator (8), and the high pressure tank (1)
Internal pressure rises to the secondary pressure. Secondary pressure is 100kg / cm ² ~
It is 150 kg / cm ² . Further, the solenoid valve (11) is closed by the operation button or the automatic control device, the solenoid valve (13) is opened, compressed air is supplied by the high pressure plunger pump (9), and the high pressure tank (1) is closed. The internal pressure rises to the final pressure.
The final pressure is ^{250kg / cm 2 ~300kg / cm 2} . After that, the solenoid valve (1
2) and (13) are closed. Therefore, in the high-pressure tank (1), the microorganisms of the powdered food product receive high pressure, and the high pressure compresses and contracts the microorganisms.

Then, after 5 to 10 minutes, the solenoid valve (26) is opened by the operation button or the automatic control device, and the opening / closing valve (21) is opened by the hydraulic cylinder (24). In this embodiment, first, the auxiliary valve (23) is pushed up and opened by the hydraulic cylinder (24). Therefore, the compressed air in the high pressure tank (1) is
2) Passes through the inside and is discharged to the low pressure tank (19),
The high pressure of (1) decreases to some extent. Then, at the next moment, the hydraulic cylinder (24) is engaged with the lower end of the main valve (22), and the main valve (22) is pushed up and opened by the hydraulic cylinder (24). Therefore, the high pressure tank (1) and the low pressure tank (19) are momentarily connected, the high pressure of the high pressure tank (1) is suddenly released, the compressed air and powdered food products are explosively discharged, and the passage It passes through (20) and is housed in a low-pressure tank (19). This causes the microorganisms in the powdered food product to swell and be destroyed. Therefore, the powdered food product can be effectively sterilized and the microorganisms can be completely killed.

When compressed air and powdered food products are discharged to the low pressure tank (19), compressed air and powdered food products are
(25) Ejects in the radial direction through the space. As a result, the jet thrust is alleviated, and there is no risk that the high-pressure tank (1) will be damaged or divided by the jet thrust of the compressed air.

After that, the ball valve (29) is operated by the worker, the ball valve (29) rotates around the horizontal axis (31) in the hollow member (28), and the powdered food product receives the ball valve ( It is discharged through the passage (30) of 29).

In this embodiment, the low-pressure tank (19) is kept at a low pressure below atmospheric pressure, and the low-pressure tank (19) enables the high-pressure tank (1).
When releasing the high pressure of, this can be effectively released. However, this is not always necessary. The low pressure tank (19) at atmospheric pressure may be used as long as it can rapidly release the high pressure of the high pressure tank (1). The term "low pressure tank" is for high pressure tank (1),
It does not mean a low pressure tank below atmospheric pressure.

As described above, according to the present invention, after the powdered food product is filled, compressed air is supplied to the high pressure tank (1), a high pressure is generated in the high pressure tank (1), and the high pressure causes the powder to flow. The microorganisms of the foodstuff are compressed and contracted. After that, the high-pressure tank (1) and the low-pressure tank (19) are momentarily connected to each other, the high pressure in the high-pressure tank (1) is suddenly released, which causes the microorganisms of the powdered food product to expand and be destroyed. . As a result, the powdered food product can be effectively sterilized and the microorganisms thereof can be completely killed without heat treatment, and the intended purpose can be achieved.

[Brief description of drawings]

 FIG. 1 is an explanatory view showing an embodiment of the present invention. (1)… High pressure tank (7), (8)… Air accumulator (9)… High pressure plunger pump (19)… Low pressure tank (21)… Open / close valve

Claims (1)

[Claims] 1. A high-pressure tank for filling powdered foodstuffs, which is connected to the high-pressure tank, and after filling the powdered foodstuffs,
A compressed air supply source that supplies compressed air to the high pressure tank to generate high pressure in the high pressure tank, a low pressure tank connected to the high pressure tank, and a compressed air provided between the high pressure tank and the low pressure tank. After the supply of the above, the powdery foodstuff sterilizing device comprising: an opening / closing valve for instantaneously communicating the high-pressure tank and the low-pressure tank to rapidly release the high pressure of the high-pressure tank.