JP2001120243A - Continuous-type quick freezer for food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous-type quick freezer for foods which can shorten freezing treatment time, streamline freezing operation and improve the economical efficiency of equipment installation area, and can also keep up with the kind and size of a freezing object, fluctuation in freezing environmental conditions and an outside air temperature change throughout a year. SOLUTION: In a food freezer of cold circulation type, the freezer has the following configuration: the space within a thermally insulated tunnel is divided by partitions (2) along a conveying direction into a freezing chamber (1) through which the freezing object (a) passes, a cold blast supply chamber (3) for distributing cold air to the chamber (1) and a cold air feedback chamber (8) for returning discharged cold air used for freezing to a heat exchanger (7) for cold air. Both injection slits (61) of an upper side chamber (6a) and a lower side chamber (6b) are installed in order to confront each other respectively above and below the way to the turning point of a conveyor belt (4) going through the chamber (1) and having air permeability. The slits are opened in the cross direction of the conveyor belt (4) in such a way as to have a funnel-like cross section and be in a form of an injection nozzle. Cold air from the heat exchanger (7) is made to pass through the chamber (3), is injected from the slits (61) and then is returned from the feedback chamber (8) to the heat exchanger (7).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a continuous quick freezing apparatus for foods for continuously freezing frozen foods, and more particularly, to a tunnel-type freezing step chamber having an optimum freezing environment. The present invention relates to a continuous quick-freezing apparatus for food that freezes by continuously passing food to be frozen.

[0002]

2. Description of the Related Art The basic structure of a conventional continuous cooling or freezing apparatus of this type is that a freezing unit is provided in a freezing chamber provided with a freezer unit to circulate cold air in order to optimize the entire freezing environment. This is a configuration in which food, which is a product, is frozen while being continuously moved by a conveyor.

For example, Japanese Patent Publication No. 6-33923, Japanese Patent Publication No. 7-9
As described in JP-A-336, JP-B8-6992, etc., an object to be frozen is continuously transported in a tunnel-shaped freezing chamber by a transport conveyor belt penetrating in a horizontal transport direction along the tunnel. In the process of passing, a refrigeration unit including a suction duct, an air cooler and a blower is provided above or below the transport conveyor belt in the freezing chamber, and the cool air from the refrigeration unit is passed along the transport conveyor belt. 2. Description of the Related Art A horizontal conveyor type freezing apparatus is known which continuously circulates objects to be conveyed placed on the conveyor belt by circulation.

[0004] These are compared with a known batch type freezing apparatus.
Although it is possible to freeze continuously, it is economical to incorporate it into a consistent flow operation.However, it is easy for uneven freezing to occur due to the temperature difference between the start and end of the transport in the freezing chamber. It is not enough in terms of securing quality such as collapse of the shape of the product, deterioration of freshness, etc. In addition, since the entire length of the device is long and the freezing time is long,
It is uneconomical in that the floor space required for installation of the apparatus is increased and energy costs are required.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an improvement of a continuous quick freezing apparatus for food belonging to the horizontal conveyor type freezing apparatus, which has the advantages described above, the prevention of collapse of the shape of an object to be frozen, and the reduction of freshness. While ensuring the quality of prevention, etc., the freezing time is shortened to improve the efficiency of the freezing operation and reduce the uneconomical effect of the installation area of the equipment. It is an object of the present invention to provide a high-value-added continuous quick-freezing device for food that can respond to changes in environmental conditions and can respond to changes in the outside air temperature throughout the year.

[0006]

The continuous rapid freezing apparatus for frozen foods such as foods according to the present invention, like the conventional cold air circulation type food freezing apparatus, uses a non-frozen material supply port (A) to supply a frozen material from an unfrozen material supply port (A). In the freezing room (1) in the heat insulation tunnel leading to the outlet (B),
The object to be frozen (a) transported by the transport conveyor belt (4) penetrating in the horizontal transport direction along the tunnel was sent from the cold air heat exchange means (7) into the freezing chamber (1) in the adiabatic tunnel. It is based on a configuration in which the air is frozen by cold air and the cold air after the heat exchange with the frozen object (a) is returned to the cold air heat exchange means (7).

The features of the continuous food freezing apparatus according to the present invention are as follows. The conveyor belt (4) is made of a net member or a punching member provided with a large number of perforations, and is capable of ventilation. 2. The inside of the adiabatic tunnel is partitioned by a partition (2) along the transport direction, and a single or multiple freezing chambers (1) through which the frozen object (a) passes A cold air supply chamber (3) for distributing and supplying cold air to the freezing chamber (1), and cold air for returning the cold air subjected to heat exchange cooling to the frozen object (a) to the cold air heat exchange means (7). Divided into return room (8). 3. Above and below the forward side of the transporting conveyor belt (4) in the freezing chamber (1), a funnel-shaped injection nozzle was formed along the width direction of the transporting conveyor belt (4) and toward the belt surface. The upper chamber (6a) and the lower chamber (6b), in which the injection slit (61) is opened, guide the cool air from the cold air supply chamber (3) to the injection slit (61), and furthermore, the funnel walls on the same side are connected to each other. A large number of combs are provided along the transport direction so as to communicate with the cool air return chamber (8) as a jet flow return passage (62). 4. Regarding the upper chamber (6a), a slit for injection with reference to the upper surface on the forward side of the conveyor belt for transport (4)
The height of the opening position in (61) is set to a fixed height in consideration of the thickness of the frozen object (a) or to a different height depending on the freezing state, or provided so as to be adjustable. It is in.

[0008]

According to the present invention, the continuous quick freezing apparatus for food according to the present invention having the above-described structure is provided with a heat exchange means for cold air (7).
In a tunnel-shaped freezing chamber (1) equipped with a freezing means and a blowing means by (1), the frozen object (a),
Ventilation conveyor belt (4) consisting of a net member or a punching member provided with a large number of perforations is supplied sequentially in an aligned state and continuously passed, and in the passage stage, the conveyor belt (4) It is frozen by cold air injected from the upper and lower sides of the forward side of the machine, so it is possible to take advantage of the advantage that the freezing operation can be efficiently performed by incorporating it into the integrated flow operation unique to the horizontal conveyor type freezing device it can.

In particular, according to the freezing apparatus of the present invention, the transport conveyor belt (4) on the forward movement side along the width direction on both the upper surface side and the lower surface side on the forward movement side of the conveyor belt (4). )
The injection slit (61) having a funnel-shaped injection nozzle in cross section is formed so as to form an injection flow return passage (62) between funnel walls on the same side. By arranging a large number of chambers (6a) and lower chambers (6b) in a comb shape along the transport direction, cool air ejected from the ejection slit (61) passes through the ejection flow return passage (62). As it circulates smoothly, a high-speed airflow that does not cause a decrease in air volume due to back pressure is obtained, and the frozen object (a) on the conveyor belt (4) for transport is transported and moved,
By promoting the impingement effect by directly blowing the sprayed cool air from above and blowing the sprayed cool air from below passing through the conveyor belt (4), the freezing heat exchange is quickly performed by improving the heat transfer coefficient. As a result, the freezing efficiency is improved, and the whole is frozen uniformly in a short time without causing freezing unevenness.

The jetting slit (61) provided with the conveyor belt (4) interposed therebetween has a nozzle-shaped cross-section or a nozzle-shaped cross-section that is continuous with a funnel-shaped injection chamber. Low pressure loss during cold air injection,
In addition, since the flow of the cleaning liquid and the like does not stay, the sanitary property can be further improved.

Therefore, according to the present invention, while securing the advantages of the horizontal conveyor type freezing apparatus, the freezing operation can be made more efficient by shortening the freezing time and the uneconomical effect of the apparatus installation area can be reduced. A high value-added function that can eliminate unevenness in freezing of objects, and can respond to changes in types and sizes and freezing environmental conditions, and can respond to changes in outside air temperature throughout the year.
A continuous quick freezing device for food can be provided.

Further, in the upper chamber (6a) serving as a pressure chamber, the height of the opening position of the injection slit (61) with respect to the forward upper surface of the conveyor belt (4) is determined by the object to be frozen (a). Constant height or frozen object considering the thickness of the object (a)
The height can be adjusted according to the
(a) can be provided with exclusiveness or selectivity.

According to a second aspect of the present invention, the freezing chamber (1) is partitioned into a plurality of chambers for stepwise freezing, and the cold air heat exchange means (7) is controlled so as to individually control the freezing environment in each chamber. By having it, as a freezing environment according to the frozen object (a),
Enables reliable freezing in a short time.

[0014] According to a third aspect of the present invention, there is provided a freezing room.
(1) is the initial freezing step chamber (1a) and the main freezing step chamber (1
b) and three freezing step chambers (1c), each having a heat exchange means for cold air (7) so as to individually control the freezing environment of each freezing step chamber (1a, 1b, 1c). Thereby, the control becomes more accurate and simple, and an optimal freezing environment can be constructed.

That is, cold air with different freezing conditions such as temperature and injection speed is injected from the injection slits (61) of the upper chamber (6a) and the lower chamber (6b), so that each of the freezing step chambers (1a, 1b). , 1c) can be minimized, and freezing of the frozen object (a) can be performed without an average freezing unevenness without losing the shape of the frozen object (a). The object to be frozen (a)
It is possible to accurately and automatically control the setting of the freezing environment conditions corresponding to the above, and it is possible to improve the efficiency of freezing operation, reduce the number of workers, and ensure the quality of the frozen object (a).

Further, the freezing environment which needs to be changed depending on the type, shape, outside temperature, etc. of the object to be frozen (a) is changed by changing the transfer speed of the conveyor belt (4), and changing the freezing step chamber.
(1a, 1b, 1c) It is possible to change the temperature and injection speed of the cold air to be controlled for each, and to ensure the quality of the frozen state of the frozen object (a) and diversify the range of the frozen object (a). Can be planned.

According to a fourth aspect of the present invention, the freezing chamber (1)
A single or a plurality of freezing chambers (1) of the continuous rapid freezing apparatus for food according to claim 1, 2 or 3, wherein a freezing environment can be changed and controlled by providing a freezing temperature detecting means therein.
Alternatively, the initial freezing step chamber (1a) and the main freezing step chamber (1b)
The control of the finishing freezing step chamber (1c) can be performed more accurately and quickly, and an optimum freezing environment can be constructed.

According to a fifth aspect of the present invention, there is provided a freezing chamber.
If a part of (1) is provided with control means for suppressing the pressure in the lower chamber (6b) from rising above the pressure in the upper chamber (6a), One of the objects to be frozen (a) on the conveyor belt for transport (4), which is caused by a decrease in the effective area of the cold air passage due to water icing on the net member or the punching member and a dynamic pressure caused by an increase in the wind speed accompanying this. The floating phenomenon can be prevented, and a smooth and reliable freezing process can be performed under an optimum freezing environment.

Although the description of the air purifier is omitted, if the room in which the freezing device is installed is a clean room and is kept at a constant temperature, it is not necessary to pass the supplied cool air through the purifier. It is not necessary to equip it as a device, but otherwise, it is necessary to equip it because the frozen object is food.

If a fan (5) is provided to blow the cold air under pressure before the cold air reaches the freezing chamber (1), the temperature of the cold air in the cold air supply chamber (3) is reduced. Averaging and distributing this to the upper chamber (6a) and the lower chamber (6b), there is no unevenness in the temperature of the cold air to be sprayed.
(4) The impingement effect by spraying cold air from below that passes through is further promoted, and good freezing efficiency is obtained by rapid freezing heat exchange by improving the heat transfer coefficient without causing uneven freezing. It will be frozen in a short period of time.

[0021]

DETAILED DESCRIPTION OF THE INVENTION AND

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the configuration of an embodiment of a continuous quick freezing apparatus for food used for freezing frozen foods and the like according to the present invention, and FIG. FIG. 2 is a cross-sectional view taken along line DD of FIG. 1, and FIG.
FIG. 4 is a sectional view taken along line EE of FIG.
(6a) is a partial perspective view of the broken state of (6b), and FIG.
FIG. 6 is a detailed view of the nozzle-shaped portion forming (61), and FIG.
FIG. 7 is a partial detailed view along the conveyance direction showing the relationship with (6b), FIG. 7 is a schematic cross-sectional view in the longitudinal direction of the apparatus according to the second embodiment, and FIG. 8 is a cross-sectional view taken along line EE of FIG.

(Embodiment 1) FIGS. 1 to 6 show a continuous quick freezing apparatus for frozen food such as food according to Embodiment 1 of the present invention.
As shown in the figure, a cooling heat exchange means (7) composed of an air cooler (71) and a high-pressure blower (72), and an oval (oval) with a transverse cross section surrounded by a heat insulating wall and having a total length of 4.2 The freezing chamber main body (I) is formed in a linear tunnel shape from the unfrozen material supply port (A) to the frozen material discharge port (B). Is separated by two partition walls (2) along the transport direction, so that a conveyor belt (4) made of stainless steel net penetrates in the horizontal direction. A cool air supply chamber (3) equipped with a turbo-type fan (5) for performing the operation, and an injection flow return passage (6) for the upper chamber (6a) and the lower chamber (6b) to be described later
A cool air return chamber (8) for returning the cool air after the heat exchange from 2) to the cooling heat exchange means (7).

In the freezing chamber (1), a stainless steel balance net type conveyor belt (4) having a width of 1 m in the horizontal direction extends from the unfrozen material supply port (A) to the frozen material discharge port (B). And an upper chamber (6a) and a lower chamber (6b) serving as pressure chambers are provided above and below a forward movement side serving as a transfer side of the transfer conveyor belt (4).

As shown in FIGS. 1 to 6, the upper chamber (6a) and the lower chamber (6b) are provided with a jet slit (61) having a funnel-shaped cross section and a jetting nozzle (61). A comb-shaped opening is formed along the opening, and the space between the adjacent funnel walls is formed as an injection flow return passage (62). The jetting slits (61) of the upper chamber (6a) and the lower chamber (6b) face each other so as to sandwich the transport conveyor belt (4) along the width direction and are supported horizontally.

The upper chamber (6a) and the lower chamber
(6b) is supported at one end side of the injection slit (6b).
1) and is supported by a partition wall on the side of the cool air supply chamber (3), and the other end is connected to the jet flow return passage (6).
The cold air from 2) is communicated and the partition wall on the cold air return room (8) side
Perform by supporting in (2).

The sectional form of the injection slit (61) is as shown in FIG. 5, where θ ₁ = 8 to 17 degrees, θ ₂ = 2 to 15 degrees, A:
B = 1: 1.6 ~ 2.5, T: A = 1: 6 ~ 8, C: B = 1: 1 ~ 1.4 When confirming the resistance coefficient of the injection port and the degree of power reduction in the range, the resistance coefficient Was compared with a tube with a circular cross section with a jet slit formed in the longitudinal direction.
1.8 decreases from 1.3 to 1.25, and power reduction from 31.5%
34.2% results were obtained.

The injection slit (61) is provided in a cold air supply chamber.
(3) The internal pressure is set to the interval at which -30 ° C cold air is jetted at a speed of 30 m / s at 100 mmAq.
The height of the opening surface of the injection slit (61) in (a) with respect to the surface on the forward movement side of the conveyor belt (4) is the object to be frozen (a).
High in the vicinity of the unfrozen material supply port (A), e.g., 60 mm higher than the frozen object (a) having a thickness of 40 mm to reach the frozen material discharge port (B) From a height of 30 mm, which is lowered in accordance with the above formula, so as to collide with the surface of the frozen object (a).

The injection port of the lower chamber (6b) is set at a constant interval of 30 mm on the lower surface on the forward side of the conveyor belt (4), and is disposed on the reverse side of the conveyor belt (4). Is mounted on both sides of the balance net constituting the conveyor belt (4) by a sprocket so as to pass below the lower chamber (6b), and without using a chain for cleaning. The motor is driven using a continuously variable drive motor as a drive source, and the rotation speed can be changed by a signal from a temperature sensor provided in the freezing chamber (1) or by an operation by an operator.

Further, as schematically shown in FIG.
A part of (1) (for convenience of illustration, it is the terminal end), and a sensor for converting light energy or heat energy to electric energy at a position where there is no hindrance to transportation and where the injected cold air collides S) is surrounded by a protective net, and the relief valve (V) is controlled by a wind speed controller (W) operated by the electric signal, so that the blowing wind speed from the lower chamber (6b) is adjusted from the upper chamber (6a). Floating prevention means that makes the velocity of the blast object slower than the velocity of the blast air is prevented from floating on the conveyor belt (4) for transport.

The present invention is not limited to the above-mentioned floating prevention means, but is provided by weight balance means for setting the internal pressure by utilizing the balance between the moment due to the change in the length or weight of the arm and the moment due to the internal pressure. The pressure may be adjusted so that the velocity of the jet air from the lower chamber (6b) is lower than the velocity of the cool air from the upper chamber (6a).

In the first embodiment, the heat exchange means (7) for cold air is illustrated and described as being externally mounted.
It may be within (I).

(Embodiment 2) Next, a continuous food freezing apparatus according to Embodiment 2 of the present invention will be described with reference to FIGS. 7 and 8.

The continuous quick-freezing apparatus for frozen foods such as foods according to the second embodiment of the present invention comprises an air cooler (I) in a freezing chamber body (I) having a rectangular section and a total length of 5 m surrounded by a heat insulating wall. 71) and a high-pressure blower (72) to be provided if necessary, provided with a cooling heat exchange means (7), and in the freezing chamber (1), with a conveyor belt (4) for conveyance. The structure related to the upper and lower upper chambers (6a) and the lower chamber (6b) on the forward side, which is the transport side, and the injection slit (61) are the same as those in the first embodiment.
The description is omitted here.

The freezing chamber main body (I) includes a conveyor belt (4) made of stainless steel net and a frozen material take-out port (B) in a tunnel surrounded by a heat insulating wall. A transfer means is provided, and on both sides of the transfer means in the transfer direction, a cold air supply chamber (3) and a cool air return chamber (8) are formed by being partitioned by a partition (2) provided with a cool air circulation passage at the top. Also, a top plate is provided above the upper chamber (6a) to form an empty room between the heat insulating wall and a plurality of cooling heat exchange means (7) disposed along the transport direction. A freezing chamber (1) is formed by the partition (2) and the top plate, and a cooling heat exchange means (7) is provided in the empty chamber, and a cold air supply chamber (3) is correspondingly provided.
A turbo fan (5) for averaging the room temperature of the freezing chamber (1) and for pumping or circulating cool air is provided at the upper part of the inside.

Embodiment 2 differs from Embodiment 1 in that
A component with a built-in cooling heat exchange means (7) and a freezing chamber
(1) is divided along the transport direction, and sequentially forms three chambers of an initial freezing step chamber (1a), a main freezing step chamber (1b), and a finishing freezing step chamber (1c), and a cold air supply chamber (3). The cold air return chamber (8) is similarly partitioned, and each is provided with a cooling heat exchange means (7) so that the freezing environment of each of these chambers can be independently controlled, and the freezing step chambers (1a, 1b, 1c) are also provided. ) Is controlled by the respective freezing step chambers (1a, 1b, 1
The point is that control is performed by an electric signal from a frozen state detecting means having a function of converting light energy or heat energy to electric energy provided in c).

The continuous quick freezing apparatus for food according to the first and second embodiments is based on the premise that the frozen object (a) itself or the thickness is constant. ) Of the upper chamber (6a) with respect to the forward movement surface of the conveyor belt (4), so that it can be used even when the It is preferable to provide a height changing means for arbitrarily changing and adjusting.

The height changing means may be carried out by supporting means for fixing the upper chamber (6a) to each partition (2) by supporting columns provided with adjusting holes in the up-down direction, or by rotating the rotation to a linear movement. The rotation side is driven by electric or manual operation using a motion transmission mechanism such as a screw rod and a nut, a rack and a pinion, etc.

The above-mentioned changing means is not limited to a mechanism for converting a rotary motion into a linear motion, and the like. The pressure or pressure of a fluid (gas or water containing air) which does not adversely affect foods and a spring It can also be performed by control of a slide means constituted by a combination with the above.

Further, the continuous quick freezing apparatus for frozen foods such as foods of the present invention according to the above-described embodiment (cross-section nozzle type injection port).
And a continuous quick-freezing device for food with a slit formed in the axial direction of the circular pipe as a cool air injection port (circular cross-section slit), when the jet air velocity is 35m / s, 25m / s, and 15m / s The results of comparison of the freezing time required to reach the core temperature of -15 ° C were as follows.

Conditions Target object Hamburger shape Shape 150mm in diameter, 15mm in thickness Weight 150g / piece Cold air temperature -40 ～ -43 ℃ Freezing product core temperature -15 ℃ Transport speed 1.1m / min

Corresponding injection port (nozzle type and slit type)
The comparison results of the jet wind speed and the freezing time are as follows.

As is clear from the results, the continuous rapid freezing apparatus for frozen foods such as foods (cross-section nozzle type injection port) is provided with a slit formed in the axial direction of the circular pipe at the cold air injection port (circular cross-section pipe). The time required for freezing and the length of the required equipment are significantly reduced compared to the continuous quick-freezing equipment for slitting foods, improving the efficiency of freezing work, miniaturizing the equipment, reducing the blowing power, and requiring a narrow installation space. It can be a very economical device.

The miniaturization of such a device, the reduction of the blowing power and the narrow installation space are made possible by a cold air supply passage to the upper chamber (6a) and the lower chamber (6b), the upper chamber (6a) and the lower chamber (6). Another important factor is that the cool air supply chamber (3) and the cool air return chamber (8) are formed without using a duct in each of the exhaust passages from 6b).

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a longitudinal sectional configuration of an apparatus according to a first embodiment.

FIG. 2 is a sectional view taken along line DD of FIG. 1;

FIG. 3 is a sectional view taken along line EE in FIG. 1;

FIG. 4 is a partially broken perspective view of the upper and lower chambers.

FIG. 5 is a detailed view of a nozzle-shaped portion in which an injection slit (61) is formed.

Fig. 6 The object to be frozen (a) being transported and the upper chamber (6
FIG. 4 is a partial detailed view along a transport direction showing a relationship between a) and a lower chamber (6b).

FIG. 7 is a schematic diagram of a longitudinal sectional configuration of an apparatus according to a second embodiment.

FIG. 8 is a sectional view taken along line FF of FIG. 7;

FIG. 9 is an explanatory diagram of an example of a control unit for preventing floating of an object to be frozen (a) on a conveyor belt (4).

[Explanation of symbols]

 (A) Freezing object supply port (B) Frozen material take-out port (I) Freezing room body (a) Freezing object (1) Freezing room (1a) Initial freezing step room (1b) Main freezing step room (1c) Finish Freezing step chamber (2) Partition wall (3) Cold air supply chamber (4) Conveyor belt (5) Fan (6a) Upper chamber (6b) Lower chamber (61) Slit for injection (62) Jet return path (7 ) Heat exchange means for cooling (8) Cold air return chamber

Claims (5)

[Claims] 1. A conveyor belt that passes through a freezing chamber (1) in a horizontal conveying direction along a tunnel by cold air sent from a cold air heat exchange means (7) into a freezing chamber (1) in an adiabatic tunnel. (4) Freezing the frozen object (a) above, and
(a) In the cold air circulation type food freezing device in which the cool air after the heat exchange with (a) is returned to the cool air heat exchanging means (7), the transport conveyor belt (4) has a net member or a large number of perforations. A freezing chamber consisting of a punching member provided with a partition and dividing the inside of the heat-insulating tunnel with a partition wall (2) along the transport direction, and through which a single or multiple frozen objects (a) pass. (1), a cold air supply chamber (3) configured to distribute and supply cold air from the cold air heat exchange means (7) to the freezing chamber (1), and heat exchange cooling was performed on the frozen object (a). A cold air return chamber (8) for returning the cold air to the cold air heat exchange means (7) is divided into a cold air return chamber (8). Along the width direction of (4) and toward the belt surface, an upper slit where an injection slit (61) in the form of a funnel-shaped injection nozzle is opened. The cool air is guided from the cold air supply chamber (3), which is a common passage, to the respective injection slits (61) through the chamber (6a) and the lower chamber (6b), and the jet flows between the funnel walls on the same side. As the return passage (62), a large number of combs are provided horizontally in the transport direction so as to communicate with the cold air return chamber (8), and the upper chamber (6) is provided.
For (a), the height of the opening position of the injection slit (61) with respect to the upper surface on the forward side of the conveyor belt (4) is set to a fixed height or freezing considering the thickness of the frozen object (a). A continuous quick freezing apparatus for food, wherein the apparatus is set at a different height or adjustable according to the state. 2. The freezing chamber (1) is divided into a plurality of chambers for stepwise freezing, and a cold air heat exchange means (7) is provided so as to individually control the freezing environment of each room. Food quick freezing equipment. 3. The freezing chamber (1) includes an initial freezing step chamber (1a).
And a freezing step chamber (1b) and a finishing freezing step chamber (1c).
Heat exchange means for cold air so that the freezing environment of c) is individually controlled
The continuous quick freezing apparatus for food according to claim 1, further comprising (7). 4. A continuous rapid freezing apparatus for food according to claim 1, wherein a freezing temperature detecting means is provided in the freezing chamber so that the freezing environment can be changed and controlled. 5. A control means for suppressing a pressure in the lower chamber (6b) from increasing above a pressure in the upper chamber (6a) in a part of the freezing chamber (1). 5. The continuous quick freezing apparatus for food according to claim 1, 2, 3 or 4.