JPS6384468A - Far-infrared thawing apparatus - Google Patents

Abstract

PURPOSE:To uniformly raise the temperature of a food to be thawed, to prevent the progress of oxidation, to remarkably shorten the thawing time and to reduce the production cost of a thawing apparatus, by applying far infrared radiation and clean cold humid air to the objective food in a thawing chamber. CONSTITUTION:A thawing chamber 1 holding a food F to be thawed is connected with an apparatus 2 for cleaning and supplying cold humid air and ceramic heaters S1 and S2 radiating for infrared radiation are placed in the thawing chamber 1. One or more ceramic heaters are fixed to a definite position in the thawing chamber 1 and far infrared radiation and clean cold humid air are supplied to the thawing chamber. The temperature of a food to be thawed can be uniformly raised, the progress of oxidation can be prevented, the thawing time can be remarkably shortened and the production cost of thawing apparatus can be reduced by the above construction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thawing machine for frozen foods, and particularly to a thawing machine that utilizes far infrared rays.

[Conventional technology]

BACKGROUND OF THE INVENTION With the development of refrigeration technology, the number of frozen foods and the like has increased year by year, and they are now being effectively utilized in daily life.

However, even if fresh food can be frozen, if it is not thawed properly, the original flavor of the food may be lost.Therefore, there is an urgent need to improve thawing technology, that is, to develop superior thawing equipment.

Current thawing devices include, for example, devices that use water heated by a heater to warm the thawing chamber that stores the items to be thawed, but because the specific heat of the water is large, It takes a long time for the indoor temperature to drop, and
Therefore, there is a problem in the preservation of thawed foods.

To solve this problem, an apparatus has been proposed in which the thawing chamber is kept at a low temperature by constantly circulating water at 0.degree. C., and the temperature of the chamber is raised using a blower or the like during thawing.

In addition, the device heats the object to be thawed using high frequency waves used in microwave ovens, etc., and also supplies cold air into the thawing chamber to prevent temperature rise on the surface of the object to be thawed, and to uniformly thaw the inside and surface of the object. has also been proposed.

[Problem that the invention seeks to solve]

However, in the first two conventional devices mentioned above, the temperature inside the thawing chamber is raised and the heat is conducted to the thawing object through convection of indoor air to thaw the object, so that the temperature inside and outside of the thawing object is uniform. In addition to being unable to rise, it takes a long time to thaw. Additionally, due to the temperature rise in the thawing chamber, the oxidation of the thawed material progresses and the humidity decreases.

There are problems such as generation of drips and easy adhesion of dust in the room, which tends to spoil the original taste of foods to be thawed.

In addition, in the third conventional device mentioned above, the frequency is 2450MHz.
This method uses high frequency waves to raise the temperature of the food to be thawed, but when using this method to thaw large foods, the outer surface tends to thaw before the inside.

In addition, attempts are being made to uniformly thaw the food inside and outside by supplying cold air to prevent the outside surface from boiling due to temperature rises, but it is difficult to adjust the temperature between the rapid heating and the cold air that lowers the temperature of the outside surface of the food. Moreover, since it is a rapid thawing method, there is a problem as to whether the original mature taste of the food can be maintained. Furthermore, since it requires a high frequency generator using a magnetron or the like, the equipment becomes large-scale and the manufacturing cost increases.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention constructs a thawing machine using ceramics that emit far-infrared rays.

That is, infrared rays are 0.76 to 08μ at the long wavelength end of visible light.
Electromagnetic waves in the wavelength range with m as the lower limit and 1++ m as the upper limit, of which wavelengths around 3 μm are called near infrared rays, and are also called heat rays because the vibrational spectrum of molecules appears, but far infrared rays In the present invention, for example, ceramics that emit far infrared rays with a wavelength of 8 to 14 μm are used.

Accordingly, the present invention comprises a thawing chamber for storing objects to be thawed, a cold and humid air supply cleaning device communicated with the thawing chamber, and a ceramic that emits far infrared rays disposed within the thawing chamber. , one or more of the ceramics are fixed in a predetermined position in the thawing chamber to supply far infrared rays and clean cold and humid air into the thawing chamber, thereby configuring a far infrared thawing machine; This solves the above problems.

[For production]

The thawing machine of the present invention can thaw frozen items in their original fresh and mature taste state through the purifying, humidity regulating, maturing, and activating effects of far infrared rays emitted from ceramics. At the same time, the temperature of the thawed object is gradually raised by radiant heat transfer of far-infrared rays.

While supplying clean cold and humid air, the temperature of the frozen object is raised uniformly under low temperature and high humidity to thaw it.

〔Example〕

An example of implementation of a far-infrared thawing machine according to the present invention will be explained with reference to FIGS. 1 and 2.

FIG. 1 is a cross-sectional view of an example of the thawing machine of the present invention, taken longitudinally through the thawing chamber.
Cyclone 21 for removing dust, fan 22 for circulating air. Heat exchanger that converts air into cool and moist air 23. Cold water tank 24. It is formed by connecting a cold water circulation pump 25 and a chiller 26 for cooling the circulating water through piping 3, 4.5 as shown in the figure.

Therefore, the ceramic work that emits far infrared rays is in the thawing chamber 1.
and ceramic S2 at each predetermined position on the inner wall surface of
are fixed to the inner wall surfaces of the cold and wet air blowout pipe 3 and the suction pipe 4 in the cold and wet air supply and cleaning device 2 .

Here, the object to be thawed F placed on the platform 11 is heated by radiant heat transfer by far infrared rays emitted from the ceramic S1, and is circulated in the thawing chamber 1 through the blow-off pipe 3 and the suction pipe 4. exposed to cold, humid wind. Dust is removed from this cold and moist air by the cyclone 21, and
Bacteria are sterilized by the ceramic S2.

Incidentally, in order to cause the ceramics S1 and S2 that emit far infrared rays to emit far infrared rays, the ceramics may be heated with electricity, combustion gas, or the like.

Far-infrared rays may be emitted by adding means other than these.

FIG. 2 is a cross-sectional view of the suction pipe 4 of FIG. 1 taken along the line X--X.

〔Effect of the invention〕

According to the far-infrared thawing machine of the present invention, there is no need for excessive heating using high-frequency waves, and frozen foods can be thawed in a fresh state by various effects of far-infrared rays.

In addition, when the temperature of the frozen food is raised by far-infrared radiation heat transfer, cold and moist air is circulated into the thawing chamber at the same time, so the temperature can be raised uniformly under low temperature and high humidity conditions, thus preventing the progress of oxidation of the food. In addition to this, the thawing time can be significantly shortened due to the high temperature raising efficiency. Incidentally.

It took 19 hours to thaw 5,980 g of frozen thigh using a conventional general thawing machine, but the thawing machine of the present invention was able to thaw 5,980 g of the same beef thigh in 9 hours. Incidentally, the volume of answer room 1 is 40an
50QI X30ai = 60,000L:M', and the installation area of the ceramic S□ was 3800a++''.

Furthermore, in the present invention, ceramics that emit far-infrared rays have semi-permanent properties as a radiator and have excellent corrosion resistance, so they are suitable for use in a thawing machine, and such ceramics are easy to manufacture. Since it is low cost, it contributes to lowering the manufacturing cost of the defrosting machine.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a thawing chamber of a thawing machine which is an example of an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line X--X of the suction pipe 4 in FIG. 1... Thawing chamber, 2... Cold and humid air supply cleaning device, 21.
...Cyclone, 22...Air circulation fan, 23...
・Heat exchanger, 24...Cold water tank, 25...Circulating water cooling chiller, 26...Cold water circulation pump, 3...Blowout pipe, 4...Suction pipe, 11...Place, F...Object to be thawed, S engineering+52...Far-infrared emitting ceramics

Claims (1)

[Scope of Claims] 1. Consisting of a thawing chamber for storing objects to be thawed, a cold and moist air supply cleaning device communicated with the thawing chamber, and a ceramic that emits far infrared rays disposed within the thawing chamber, A far-infrared thawing machine, characterized in that one or more of the ceramics are fixed at a predetermined position in the thawing chamber, and far-infrared rays and clean cold moist air are supplied into the thawing chamber. 2. The far-infrared thawing machine according to claim 1, wherein the ceramics are fixed to predetermined positions in the cold and humid air blowout pipe and suction pipe of the cold and humid air supply and cleaning device that circulates air in the thawing chamber.