JPS625584B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to fish and shellfish. Animal meat. This invention relates to a machine for preserving the freshness of fresh foods such as vegetables by sterilizing and washing them.

(Problem to be solved by the invention) Among fresh foods, fish. One of the main reasons for the decrease in freshness of meat, etc. is the generation of proteolytic enzymes, which is achieved by suppressing autolysis by lowering the food temperature.
It can stop the production of enzymes. For example, in fish, rigor mortis occurs and enzyme production becomes even more active thereafter, but by lowering the temperature of the product to 0 to 2°C, enzyme production can be almost suppressed.

In the case of fruits and vegetables, the respiratory action is used to maintain life using one's own physical strength after harvesting. The transpiration effect causes a decrease in the freshness of fruits and vegetables, and to compensate for these effects, water needs to be replenished. Decrease in core temperature. Maintaining freshness can be greatly ensured by applying treatments such as removing bacteria.

From the above points, it is recommended to wash fresh foods such as fish and shellfish.
The thawing process involves immersing the food in sterilized cooling water (in some cases, cold salt water) at around 0°C, which makes it possible to remove germs without sacrificing the freshness of the food. I can do it.

This invention is a method of cooling during the circulation process of treated water. Sterilization. It is intended to maintain the freshness of perishable foods through a more advanced cold water washing process through efficient synergistic action of each component of the filtration.

(Means for Solving the Problems) The present invention has a structure that surrounds a food input tank formed in the center of the treatment tank via a partition wall for overflow of treated water, and a treated water filtration tank is provided on at least both sides of the food input tank. The processing tank has a forced circulation pipe for treated water that connects the food input tank and the filtration tank, and a bubble generator installed at the bottom of the food input tank has a forced sterilizing air circulation pipe that connects the food input tank to the filter tank. Both pipes are connected to a double-tube sterilizer section, each of which has air supply pipes, a sterilizing lamp in the center, a quartz inner tube for air introduction on the outer periphery, and an outer tube for introducing treated water on the outer periphery. In the case of a cooling device installed along with a part of the forced circulation pipe for treated water,
The treated water pipe is passed through the center of a long cooling cylinder that forms part of the cooling system, and the cooling cylinder has a bypass for supplying high-pressure hot gas generated by a compressor that forms part of the cooling system. It consists of pipes that are connected to each other to remove the scum washed out from the food in the processing tank. Reliable separation of bacteria. Sterilization treatment of treated water and blowing air. This invention was proposed for the purpose of increasing the efficiency of cooling work of treated water, and specific embodiments of this invention will be described below with reference to the drawings.

(Example) In the figure, 1 is a processing tank, and by providing a pair of treated water overflow partition walls 2, 2 in this processing tank 1, a food input tank 3 is placed in the center of the processing tank. Treated water filtration tanks 4 and 4 are partitioned on both sides (see Figs. 2 and 3), and a filter 5 is disposed near the bottom of the filtration tank 4 so as to cover the entire surface of the filtration tank 4. There is. Fig. 4 shows a modified embodiment of the processing tank 1, in which the food input tank 3, which is partitioned on three sides by partition walls 2, 2, 2 in the center of the processing tank 1, is surrounded on three sides for processing. Water filtration tank 4, 4,
4 is formed. Fig. 5 shows the processing tank already described in Fig. 2, in which the food input tank 3 is placed in the center and the filtration tanks 4, 4 are arranged on both sides. A gutter-shaped conductive material 7 is tightly fitted between the same wall 6 of the processing tank and the partition wall 2 of the food input tank at a position slightly below the top of the partition wall 2, and is provided on three sides of the food input tank 3 for overflow of treated water. A partition wall 2 is formed. In FIG. 6, a food input tank 3 is formed in the center of the processing tank 1, partitioned on all sides by overflow partition walls 2, and the entire circumference of the input tank is surrounded by a filter tank 4. Fig. 7 shows the processing tank already described in Fig. 2, in which the food input tank 3 is arranged in the center and the filtration tanks 4, 4 are arranged on both sides. A pair of gutter-like guide members 7, 7 are tightly connected between both peripheral walls 6, 6 of the food input tank and both partition walls 2, 2 of the food input tank at the top of either the partition wall 2 or the peripheral wall 6 of the processing tank on the lower side It is fitted at a lower position, and overflow partition walls 2 are formed on all sides of the food input tank 3. The pair of gutter-shaped guide materials 7, 7 have different inclination angles on the left and right filtration tanks 4, 4 side, respectively, and the treated water overflowing onto each gutter-shaped guide material 7 together with the waste is transferred to each filtration tank 4. , 4. A filter 5 is disposed near the bottom of the filtration tank 4 in the processing tank 1 in each embodiment except for the trough-like guide material 7 formed around the food input tank 3, and the filter 5 is disposed near the bottom of the filtration tank 4 and the food input tank 3
A bottom plug 8 is attached to the bottom.

As described above, in the processing tank 1 shown in each embodiment, the food input tank 3 is partitioned with partition walls 2 on two or three sides (Fig. 3, Fig. 4, and Fig. 5). Although it is necessary that these partition walls 2 be constructed to be slightly lower than the peripheral wall 6 of the processing tank 1, it is possible that the four sides of the food input tank illustrated in FIGS. 6 and 7 have partition walls 2. When the processing tank 1 is divided into sections, the above-mentioned restriction does not apply, and the peripheral wall 6 of the processing tank 1 and the partition wall 2 may be formed at the same height, or the partition wall 2 may be formed to be slightly taller than the peripheral wall 6. This increases the amount of food input and reliably prevents the treated water from flowing back into the food input tank 3 from the filtration tank 4. A treated water circulation pipe 11 is installed between the bottoms of the filtration tank 4 and the food input tank 3 of the treatment tank, and communicates and converges with a bubble generator 28 laid over substantially the entire bottom of the food input tank 3. A sterilizing air pipe 4 whose end is open to the atmosphere is connected to the main duct 29.

The treated water circulation pipe 11 is equipped with a cooling device 12 and a sterilizing device 21, and the air pipe 22 is also equipped with a sterilizing device 21. , which constitutes a characteristic part of this machine.

First, to explain the treated water cooling device 12, the treated water circulation pipe 11 includes a pump 13 and a cooling device 1.
This cooling device 12 is a general cooling device in which a compressor 14 and a condenser 15 are connected for circulation through a series of pipes 16 filled with a cooling gas (refrigerant) such as Freon gas. A long cooling cylinder 18 with a length of about 1.2 m is formed in a bulging shape in a part of the pipe 16 that circulates the cooled gas to the compressor 14, and its outer peripheral surface is covered with a heat insulating material layer 17. A part of the treated water circulation pipe 11 passes through the longitudinal axis of the cooling cylinder 18, and in the cooling cylinder 18, the outer peripheral surface of the pipe 11 is cooled by heat exchange over a relatively long area. . A bypass pipe 19 is provided between the pipe on the gas inlet side of the cooling cylinder 18 and the pipe on the outlet side of the compressor 14 for redirecting the high pressure hot gas generated in the compressor 14 section.

Next, we will explain the shared sterilizer 21 that simultaneously sterilizes the treated water and the air introduced into the food input tank. For example, a quartz inner cylinder 23 that functions as a
A germicidal lamp 24, such as an ultraviolet lamp or an ozone lamp, is disposed in the center of the quartz inner tube 23, and a Cypronickel outer tube 25 is disposed concentrically around the outer periphery of the quartz inner tube 23, which serves as a conduit for treated water. In the sterilizer 21 composed of double cylinders,
The air pipe 22 with the blower 26 interposed therebetween is connected to the quartz inner cylinder 23, and the treated water circulation pipe 11 is connected to the outer cylinder 25.

(Function) A pump 13 which is connected to the cooling device 12 and the sterilizing device 21 and is connected to the circulation pipe 11 to supply treated water that fills the processing tank 1, especially the food input tank 3.
The treated water overflowing from the food input tank 3 is transferred to the filter tank 4 and then to the cooling cylinder 18 of the cooling device 12.
The cooling circulation is gradually repeated while being cooled in the cooling section, and the temperature is reduced to about 0°C. In the process of cooling the treated water, the cooled treated water passing through the outer cylinder 25 of the sterilizer 21 is sterilized by irradiation through the quartz inner cylinder 23 of the sterilizing lamp 24, and the air pipe 22 is also equipped with The air passing through the quartz inner cylinder 23 of the sterilizer is sterilized by the blower 26. It becomes air and rises in the treated water in the food input tank.

When this situation has passed for a predetermined period of time (approximately 6 hours in the case of this machine), the treated water in the treatment tank (which may be salt water depending on the fresh food being processed) is cooled to around 0°C. , and is in a sterilized state.

Sterilization. When fresh food is put onto the protective net 9 placed near the bottom of the food input tank 3 in the processing tank filled with cooled treated water, the jet pressure of the treated water from below. The food is gradually washed by the jetting pressure of sterilized air, removing any dirt attached to the food. Ak. Bacteria are discharged from the food and float on the surface of the treated water. And the partition wall 2 where the treated water partitions the food input tank 3.
When it overflows using the head, the attached floating matter falls into the filter tank 4 together with the treated water, and is captured by the filter 5 in the filtration tank. removed,
The filtered treated water is cooled again in the cooling device,
Also, the sterilization process is repeated by the sterilizer, and the food enters the food input tank 3 from the bottom again, and this circulation movement is repeated.

As the food cleaning process progresses, a frost wall (thermal insulation layer) is formed on the surface of the treated water pipe 11 located in the cooling cylinder 18 in the cooling device over time. By periodically removing the frosted walls, heat exchange within the cooling cylinder is carried out smoothly and actively. In the present invention, a bypass pipe 19 is used in the frost wall section, in which high-pressure hot gas generated when the cooling gas is compressed by the compressor 14 is branched into a pipe section between the outlet section of the compressor 14 and the inlet section of the cooling cylinder 18. and feed it into the cooling cylinder. That is, the solenoid valve 19' installed in the bypass pipe section is opened and closed by the operation of the thermostat that senses the temperature change of the cooling gas discharged from the cooling cylinder 18 in the cooling device, and by a timer or the like.
For example, high-pressure hot gas is intermittently supplied into the cooling cylinder 18 for 20 seconds every 1 minute and 30 seconds to prevent the formation of frost walls as much as possible.

(Effect) Sterilization by sterilizing air and sterilized cooled water that blows out from the bottom of the input tank. Acid is discharged from washed food and floats on the water surface of the feeding tank. Bacteria. Other types of deposits are effectively removed from the food as they overflow into the filter tank along with the overflowing treated water from the entire periphery of the bulkhead, which covers a wide area of the input tank divided by the bulkhead. The deposits are quickly and reliably removed from the input tank, and when the washed food is taken out of the input tank, there is no fear that the removed deposits will re-adhere to the food, allowing for sterilization. The cleaning effect can be reliably maintained.

In addition, the high-pressure hot gas that is inevitably generated when the cooling system is operated periodically is removed from the cooling cylinder, which is the heat exchange part between the treated water pipe and the cooling gas in the cooling system, which is the main factor that inhibits the cooling effect of the treated water. By branching and recirculating the treated water inside the pipe via a bypass pipe, it is possible to prevent the formation of frost walls that adhere to the surface of the treated water pipe. can be maintained for a long period of time, and the occurrence of uneven food processing due to time zones as in the conventional method can be prevented.

In addition, the sterilization device, which consists of double cylinders in which treated water and jet air are concentrically arranged, not only has an economical effect because it can perform sterilization treatments at the same time, but also allows efficient and waste-free irradiation using sterilization lamps. Sterilization treatment becomes possible, and this efficient sterilization treatment of treated water allows continuous use of treated water over a long period of time, which is also economical and can greatly contribute to miniaturization of the overall device. As described above, this invention is a method of sterilization required to maintain the quality of fresh foods. cooling. The quality of fresh food can be improved by ensuring the separation of food particles evenly and smoothly. It can widely and reliably satisfy a wide range of demands for maintaining freshness, such as hygiene management.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of a fresh food keeping machine according to the present invention, Fig. 2 is a partially cutaway front view of a processing tank, Fig. 3 is a plan view of the same, and Figs. 4 to 7 are A diagram corresponding to FIG. 3 showing another embodiment, FIG. 8 is a partially cutaway side view of the processing tank shown in FIG. 7, FIG. 9 is a partially cutaway front view of the cooling device, and FIG. 10 is the ninth
FIG. 2 is an enlarged cross-sectional view taken along line AA in the figure. In the figure, 1 is a processing tank, 2, 2 is an overflow partition, 3 is a food input tank, 4, 4 is a treated water filtration tank,
5 is a filter, 7 is a gutter-like guide material, 11 is a treated water circulation pipe, 12 is a cooling device, 13 is a pump, 14
is a compressor, 15 is a condenser, 16 is a pipe, 18 is a cooling cylinder, 19 is a bypass pipe, 21
22 is an air pipe, 23 is a quartz inner cylinder, 24 is a sterilizing lamp, 25 is an outer cylinder, and 28 is a bubble generator.

Claims (1)

[Claims] 1. In a processing tank that surrounds a food input tank formed through a partition wall for treated water overflow (water overflow) in the center of the treatment tank, and a treated water filtration tank is formed on at least both sides of the food input tank, no food is stored. A forced circulation pipe for treated water connects the input tank and the filtration tank, and a forced air supply pipe for sterilized air whose end communicates with the atmosphere is connected to the bubble generator installed at the bottom of the food input tank. Both pipes are led to a double-tube sterilizer section, which consists of a sterilizing lamp on the outside, a quartz inner tube for air introduction on the outer periphery, and an outer tube for introducing treated water on the outer periphery, and a treated water circulation pipe. In the case of a cooling system installed in a part of the cooling system, the treated water pipe is passed through the center of a long cooling cylinder that forms part of the cooling system, and the cooling cylinder forms part of the cooling system. A freshness preservation machine for fresh foods that is equipped with a bypass pipe for supplying high-pressure hot gas generated by a compressor.