JPS604515Y2 - Microwave heating sterilizer - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a microwave heating sterilization device.

Recently, a microwave heating sterilizer has been proposed in which a pipe with low dielectric loss is installed through a heating chamber to which microwaves are supplied, and the object to be heated is pumped through the pipe to sterilize the object by microwave heating. There is.

1 and 2 show such a device, 1 is a heating chamber, 2 is a magnetron that supplies microwaves to the heating chamber via a waveguide 3, and 4 is a magnetron made of Teflon with small dielectric loss. A main pipe extending through the heating chamber 1; 5, a hopper into which a heated object 6 such as jam is thrown; 7, a pressure pump that pumps the heated object 6 thrown into the hopper to the main pipe 4;
8 is the main pipe 4 on the pressure output side of the heated object 6 of the main pipe 4.
This is a pressure regulating device that regulates the internal pressure.

In this device, numeral 9 is a storage section provided at the extrusion end of the object to be heated 6 of the main pipe 4, and 10 is arranged within the storage section, and a spring 11 is used to constantly close an opening 12 at the end of the main pipe 4. The biased valve 13 is a threaded shaft to which the valve 10 is attached via a spring 11, and when the handle 14 is rotated, the shaft moves to the left or right (FIG. 2). movement, which changes the pressure on the opening 12 of the valve 10.

15 is perpendicular to the main pipe 4 and the storage section 9
This is a delivery pipe installed on the bottom wall.

When the object to be heated 6 is force-fed into the main pipe 4 through the pressure-feeding pipe 7, the object to be heated 6 is sterilized by heating with microwaves.

If the pressure inside the main pipe 4 due to the object to be heated 6 is low and the valve 10 is not sufficiently pushed to the right (FIG. 2),
The amount of the heated material 6 moving from the main pipe 4 through the storage section 9 to the delivery pipe 15 is small compared to the amount pumped by the pressure pump 7, and therefore the amount of heated material 6 in the main pipe 4 is As the volume increases, the pressure within the main pipe 4 increases.

On the other hand, if the pressure inside the main pipe 4 is high and the valve 10 is sufficiently pushed to the right (Fig. 2), the amount of heated material 6 moving to the delivery pipe 15 increases, and therefore the main pipe 4 The amount of the object to be heated 6 inside the main pipe 4 decreases, and the pressure inside the main pipe 4 decreases.

Therefore, the pressure inside the main pipe 4 is kept constant.

Here, the opening 1 of the valve 10 is opened by rotating the handle 14 in advance.
If the pressure inside the main pipe 4 is maintained at 2.7 atmospheres, for example, the heated object 6 will rise to 130°C, and therefore the heated object 6 will rise to 130°C. Thoroughly heat sterilized.

However, in the above apparatus, it is necessary to fill the main pipe 4 with the object to be heated 6 before starting heat sterilization.

That is, if microwave oscillation is started at the same time as the pressure pump 7 starts pumping the object 6 to be heated while the main pipe 4 is empty, there will be no heat in the main pipe 4 in the heating chamber 1 at this initial stage. This is because microwaves are supplied into the heating chamber 1 when there is no or almost no object 6 to be heated, resulting in a so-called dry cooking state.

Then, from the state in which the object to be heated 6 is filled in the main pipe 4, pressure feeding of the object to be heated 6 and microwave oscillation are started.

In this case, most of the objects 6 to be heated that have been filled in the main pipe 4 in advance are forced out from the storage section 9 through the delivery pipe 15 and disposed of as non-sterilized objects without being heated and sterilized first. .

However, a part of the object to be heated 6 is in the corner 16 in the storage section 9,
16, . . . , etc., and such residual heated objects 6 are transferred to the heated objects 6 that have been sufficiently heat-sterilized (to be served on a dining table, etc.) that later reach the storage section 9, albeit slightly. This will lead to an unfavorable situation in terms of food hygiene.

The present invention has been devised in view of this point, and an embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

Note that the same parts as in FIGS. 1 and 2 are designated by the same numbers and their explanations will be omitted.

Reference numeral 17 denotes a cooling pipe that is connected to the pressurizing side of the object to be heated 6 of the main pipe 4 via the first joint portion 18, and through which the object to be heated 6 is sent out; 19, a cooling chamber through which the cooling pipe is disposed; 20
．． Reference numerals 21 denote a water suction pipe and a drainage pipe provided in the cooling chamber, respectively, and the cooling water passes through the water suction pipe 20 to the cooling chamber 19.
The object to be heated 6 is thereby cooled and the vapor pressure inside the object to be heated 6 is lowered to S] atmospheric pressure.

A tube 22 is surrounded by a reinforcing net 23 and connected to the cooling pipe 17 via a second joint 24. The tube is made of highly elastic silicone rubber, fluorine rubber, or the like.

25 is a substrate disposed at the bottom of the tube 22; 26;
2 is a diaphragm facing the substrate 25 through the tube 22; 27 is an air chamber whose bottom wall is formed by the diaphragm; 28 is a compressor that supplies compressed air into the air chamber through an intake pipe 29; be.

When compressed air is supplied to the air chamber 27, the tube 22 is pressed downward through the diaphragm 26 and becomes concave, making it difficult for the object to be heated 6 to pass through the tube 22. The pressure inside 4 increases.

Therefore, when compressed air at a predetermined pressure is supplied to the air chamber 27 to maintain the pressure inside the main pipe 4 at 2.7 atmospheres, the heated object 6 rises to 130°C and is sufficiently heat sterilized. be done.

When starting microwave oscillation, the main pipe 4 is filled with the object to be heated 6 in advance to prevent dry cooking, as in the conventional case.

Then, from this state, pressure feeding and microwave heating of the object to be heated 6 are started.

Therefore, in the early stage of microwave heating, the object to be heated 6 that has not been heat sterilized as in the conventional method is squeezed out from the tube 22.

The heated object 6 is disposed of as a non-sterilized object.

In this embodiment, since the tube 22 of the pressure regulating device 8 has a smooth interior and eliminates areas where the heated object 6 tends to remain, the heated object 6 that has not been sterilized by heating can be heated as described above. At the initial stage of microwave heating, the object to be heated 6 is discharged at once without remaining inside the tube 22, and therefore, during the subsequent steady heating, the object to be heated 6 which has been sufficiently heat-sterilized is replaced by the object 6 in a non-sterilized state. There will be no contamination.

FIG. 6 shows a device according to another embodiment of the present invention, the feature of which is that the tube 22 also serves as the cooling pipe 17, and the second joint portion 24 is eliminated.

Thereby, locations where the heated object 6 tends to remain can be further eliminated.

Furthermore, since the first joint part 18 is sufficiently close to the heating chamber 1 on the pressure output side of the object to be heated 6, even if the object to be heated 6 in a non-sterilized state remains in the first joint part 18, The object to be heated 6 is exposed to the high temperature of the object to be heated 6 which will be sterilized by heat later, and is significantly sterilized.

FIG. 7 shows yet another embodiment of the present invention, in which the pressure regulating device 8 is disposed within the cooling chamber 19.

As is clear from the above description, according to the present invention, there is provided a heating chamber, a microwave supply means for supplying microwaves to the heating chamber, a pipe with low dielectric loss disposed through the heating chamber, and a pipe covered with the pipe. This is because it is equipped with a pressure-feeding means for force-feeding the heated object, an elastic tube provided in the heated object-extruding section from the heating chamber and through which the heated object is force-fed from the pipe, and a pressing means for pressing the tube from the outside. Therefore, it is possible to provide a microwave heat sterilization apparatus which can sufficiently heat and sterilize objects to be heated, and prevents non-sterilized objects from being mixed into sufficiently heat-sterilized objects.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a recently proposed device, Fig. 2 is a sectional view of the same essential parts, Fig. 3 is a sectional view of the device according to the present invention, and Figs. 4 and 5 are sectional views of the same essential parts. FIG. 6 is a cross-sectional view of another embodiment of the present invention, and FIG. 7 is a cross-sectional view of still another embodiment of the present invention. 1... Heating chamber, 2... Magnetron,
4...Main pipe, 7...Pressure pump,
22...tube, 28...compressor.

Claims (1)

[Scope of utility model registration request] A heating chamber, a microwave supply means for supplying microwaves to the heating chamber, a pipe with low dielectric loss disposed through the heating chamber, a pressure feeding means for pumping the object to be heated to the pipe, and a microwave supply means for supplying microwaves to the heating chamber. A microwave heat sterilization device characterized by comprising an elastic tube provided in a heating material extrusion section and through which the material to be heated is pumped from the pipe, and a pressing means for pressing the tube from the outside.