JPH09229527A - Fast freezing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To replace air in a refrigerator during freezing operation, cause an inside area of the refrigerator to be rapidly cooled and further cause the air to pass through an ice crystal generating region within a short period of time, thereby some fresh foodstuffs to be rapidly frozen while their freshness is being kept and to enable a continuous freezing operation to be carried out. SOLUTION: An inner wall is formed into a far infrared ray radiation ceramic surface 4, and a cooling heat exchanger 5 and a fan 6 are arranged. A side part of the heat exchanger 5 is provided with nozzles 8 for atomizing cooling agent substantially along its front surface, and then there is provided a discharging section 9 having a discharging damper D started to operate with an inner pressure when a pressure in the refrigerator becomes higher than a specified value. Further, there are provided a refrigerator temperature sensor and a core temperature sensor for sensing a temperature at the central part of a frozen item K. A door for use in loading-in or unloading a shelf-like rack storing the frozen item K is placed between the fan and the heat exchanger. A door of a freezing refrigerator 2 is opened or closed to take the surrounding air into the refrigerator, cold air is discharged out of a discharging section 9, the taken air is cooled to cause an inside part of the refrigerator to be reduced in its pressure, and a cooling agent atomizing operation performed through the nozzles, opening of a door 10 to feed in the surrounding air and an air discharging operation are carried out in a proper interval.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is useful for freezing so-called fresh foods such as cooked rice and sushi, raw sea urchin, sashimi, white fish, and matsutake mushrooms, which can be enjoyed in the same way as before freezing when naturally thawed. It is related to a quick freezer.

[0002]

2. Description of the Related Art Conventionally, in order to preserve foods such as cooked rice, sushi, raw sea urchin and sashimi without losing their freshness, they have been placed in a freezer and cooled and frozen.

[0003] Conventional freezers include those that only spray a coolant into the freezers and those that circulate and supply a refrigerant gas by a refrigerator built in the freezers. The object to be frozen was only gradually cooled and frozen.

However, in conventional freezers, it takes too much time to pass through the ice crystal forming zone, the starch quality of cooked rice etc. is altered, and the cells of other foodstuffs such as fish and meat are destroyed by foodstuffs. The umami taste of the ice turned into ice when it thawed and flowed out as a drip, which was not enough to endure the taste.

In addition, these fresh foods are produced in large quantities,
In order to quickly put it on the distribution process, it is necessary to cool and freeze it in a short time after production, but it has not been possible in the conventional freezer.

Moreover, in the conventional cooling and freezing method using a freezer, after the food is put in the freezer, the air in the freezer is not positively replaced, and the air in the original freezer remains unchanged. Since it was chilled and frozen, and sterilization treatment was not performed prior to freezing, miscellaneous bacteria adhered between the production of foodstuffs and freezing often remained.

[0007]

Therefore, the problem to be solved by the present invention is to positively replace the air in the freezer during freezing, thereby rapidly cooling the replaced air in the freezer to form ice crystals. It passes through the generation zone in a short time, rapidly freezes the fresh food that is the frozen object while keeping the freshness, and sterilizes the inside of the refrigerator and sterilizes the frozen object while keeping the temperature inside the refrigerator almost uniform. The object of the present invention is to provide a quick freezer that can be used for continuous freezing treatment of frozen objects.

[0008]

One of the constitutions of the present invention made for the purpose of solving the above-mentioned problems is to provide a freezer having an inner wall surface formed on a far-infrared radiation ceramic surface,
The heat exchanger that cools the inside of the refrigerator and the fan that sucks and convects the cool air inside the refrigerator are arranged at appropriate intervals on the back side and the inner wall surface, and the front sides are opposed to each other at appropriate intervals, and the heat exchange is performed. An appropriate number of spray nozzles for spraying the coolant in a spray form are provided on the side of the container, and when the pressure in the refrigerator exceeds a certain value, the exhaust with a damper that operates at the exhaust side with the internal pressure. And a core temperature sensor that detects the temperature of the inside of the freezer and a core temperature sensor that detects the temperature of the center of the freezing target, and the freezing target is provided between the heat exchanger and the fan. A door is provided for loading and unloading a rack in which items are stored. By opening and closing the door of the freezer, external air is taken into the freezer to cool the inside from the exhaust unit. Air is exhausted and new intake An operation of spraying a coolant from the nozzle into the chamber by operating to cool the air to bring the chamber into a depressurized state, an operation of opening a door to introduce outside air into the chamber, The present invention is characterized in that a series of operations for automatically exhausting excess gas in the refrigerator from the exhaust section by the action of a damper is performed at appropriate intervals, and another configuration is an entrance having front and rear doors. Each of them has a size such that a plurality of racks for storing objects to be frozen can be arranged side by side in a row in the front and rear, and the inside wall is formed in a cylindrical freezer with a far-infrared radiating ceramic surface. A heat exchanger for cooling and a fan for sucking and convection the cool air in the refrigerator are arranged with an appropriate interval between the back side and the inner wall surface and the front sides facing each other with an interval for accommodating the rack therebetween, On the side of the heat exchanger An appropriate number of spray nozzles for spraying the coolant in a spray form are provided substantially along the front surface, and when the pressure inside the storage chamber reaches a certain value or more, an exhaust portion with a damper that operates on the exhaust side at the internal pressure is formed, Moreover, a temperature sensor for detecting the temperature inside the refrigerator, a timer for setting the timing and time of the spray supply of the coolant, and a front and rear door for the shelf-like rack storing the objects to be frozen near the freezer. A push-in device that pushes the rack-shaped rack pushed out from the rack carry-in port into the warehouse in synchronism with the opening and closing of the rack, and a circulation device that positions the shelf-shaped rack pushed out from the rack carry-out port in front of the carry-in port. It is characterized by that.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a partially cut front view of an example of an embodiment of the quick freeze store of the present invention, FIG. 2 is a right side view of a partially cut slide of the quick freeze store shown in FIG. 1, and FIG. 3 is a quick freeze shown in FIG. FIG. 4 is a side view of a quick freezing chamber according to another example of the present invention.

In FIGS. 1 to 3, 1 is a pedestal, 2 is a freezer installed on the pedestal, which is insulated from the outside by a heat insulating material 3, and cold air is circulated inside thereof. Four
Is a ceramic surface on which far infrared rays are radiated, which is formed by coating the inner wall surface of the freezer 2. This applied ceramic surface 4 makes it possible to uniformly maintain the temperature in the refrigerator, suppress the growth of bacteria in the refrigerator (sterilize), and prevent frost from forming on the inner wall surface during freezing. There is also. The ceramic surface may be formed by applying a sheet material having a ceramic layer emitting far infrared rays on one surface to the inner wall surface of the freezer, in addition to coating.
As the ceramics, zirconia-based and alumina-based ones are used, but if far infrared rays are radiated,
Other than these can also be used.

Reference numeral 5 is a heat exchanger for cooling the air in the freezer 2, 6 is an axial fan for convection while sucking the cool air in the freezer 2, and 7 is a drive source for the fan 6. As shown in FIG. 2, the heat exchanger 5 is provided with a plurality of cooling pipes for circulating a refrigerant gas, and the cooling pipes are vertically arranged with appropriate gaps.
Heat is exchanged when the air in the refrigerator passes between the cooling pipes. The heat exchanger 5 and the axial fan 6 are provided with a space on the back side between them and the inner wall surface of the freezer 2 to such an extent that the inside air can be circulated, and the front sides are opposed to each other so that the freezer is freezer. It is installed upright in 2. Heat exchanger 5
The axial fan 6 is spaced from the axial fan 6 by a rack L which will be described later. Although two axial fans 6 are provided here, the number of axial fans 6 may be arbitrary depending on the size of the freezer 2.

Reference numeral 8 denotes a spray nozzle for spraying the coolant in a spray form, which is mounted on the front side of the heat exchanger 5 so as to spray at a substantially right angle to the axial direction of the axial fan 6.
Here, as shown in FIG. 3, although four are provided at appropriate intervals in the vertical direction, four or more, for example, eight or more are provided, and these may be alternately operated at intervals of one. Good. Also, how many spray nozzles 8 are provided, and
The operation mode can be arbitrarily set depending on the size of the freezer 2, as in the case of the fan 6. A hose having an electromagnetic valve is connected to the nozzles 8 from the outside, the hose is connected to a cylinder of a coolant, and the coolant is operated by operating the solenoid valve by operating the operation panel surface described later. Supply and stop shall be controlled. Reference numeral 9 denotes an exhaust portion with a damper D which is operated on the exhaust side by the action of the internal pressure when the pressure in the freezer 2 becomes a certain value or more. The damper D is a silicon rubber plate here and is horizontal to the middle portion thereof. Although two semi-circular plates are stacked with a certain gap, other than the above-mentioned rubber plates as long as they are elastic and can be bent by the action of internal pressure above a certain level in the freezer. Other materials, such as plastic materials and spring steel plates, may also be used.

Reference numeral 10 is a door provided at the entrance of the freezer 2. Reference numeral 11 is a handle for manually opening and closing the door 10. The racks L accommodating and storing objects to be frozen are put into and out of the freezer 2 by the handle. 11
To open the door 10 wide. FIG. 1 shows a state in which the rack L is housed in the freezer 2 between the axial fan 6 and the heat exchanger 5. M is a rack of this rack L, and in the illustrated example, the racks are provided over 7 steps up and down, but the number of steps can be arbitrarily selected according to the size of the object to be frozen, for example, 20 steps at intervals of 70 mm up and down. It may be provided over. K is an object to be frozen placed on each shelf M, and a core temperature sensor 12 with a connector is inserted into some of the objects to be frozen K to the center before freezing. This core temperature sensor
Reference numeral 12 is for measuring the temperature of the central portion of the freezing object K and determining whether or not the central portion is frozen. An expandable compensating lead wire is connected to the connector to freeze the rack L. A door to make it easier to stab the frozen object K when putting it in
Installed near 10. It should be noted that it is difficult to pull out the core temperature sensor 12 as it is from the object K to be frozen after freezing, and if the core temperature sensor 12 is forcibly pulled out, the core temperature sensor 12 may be bent or damaged. Therefore, here, the core temperature sensor
The connector of this sensor 12 is replaced with a heating device (not shown) so that 12 can be easily pulled out, and this device is turned on to allow the current in the core temperature sensor 12 to flow. It uses a method to generate heat.
A temperature sensor (not shown) for detecting the temperature inside the freezer 2 is provided in the freezer 2.

Reference numeral 13 denotes an operating unit, which is a temperature measuring device for displaying the temperature inside the freezer 2 measured by a temperature sensor, the temperature at the center of the frozen object K measured by the core temperature sensor 12, and the pressure inside the container. A buzzer that issues an alarm prompting the opening / closing operation of the door 10 when the internal temperature reaches a predetermined temperature, the internal temperature of the refrigerator, and the frozen object K
A device for recording the temperature change of the central part of the device, a device for setting the rotation speed of the axial fan 6 and the cooling temperature by the heat exchanger 5,
A device for setting the supply timing and supply time of the cooling agent and the bactericide for food, a timer, etc. are contained. Reference numeral 13a denotes an operation panel surface for operating the equipment of the operation unit 13.

An example of the quick freezer of the present invention is constructed as described above, but in the present invention, the food for sterilizing and supplying the food sterilizer supplied from the outside into the freezer 2 is further supplied. A disinfectant supply nozzle may be provided. As a liquid for sterilizing food, horseradish oil, mustard oil, or the like is used, and it is possible to effectively sterilize the frozen object, which is a food material, without losing its freshness and taste. The horseradish oil and mustard oil are natural oils in which the components extracted from wasabi and mustard seeds are concentrated.

Thus, the operation of the quick freezer according to the present invention having the above-described structure is such that when the temperature in the freezer 2 becomes 0 ° C. or less by the temperature sensor, the door 10 is opened by the manual opening / closing handle 11. The inside pressure of the freezer 2 rises when fresh fresh air is taken into the freezer 2 by opening and closing it by about 90 ° and closing it immediately. The damper D of the exhaust unit 9 opens, and the air, the sprayed coolant, and the germicide in the freezer 2 are exhausted from the exhaust unit 9 to the outside. The inside of the freezer 2 in which fresh air outside is taken in is in a decompressed state because the internal gas is cooled by the heat exchanger 5 and the axial fan 6 to be reduced in volume. When the pressure is reduced, the spray nozzle 8 to the heat exchanger 5
When the coolant is supplied toward the front side of the, the sprayed coolant is sucked by the axial fan 6 and sprayed on the frozen object K placed on the rack l of the rack L, and is indicated by an arrow Q. So that it hits the inner wall of the freezer 2 and is split up and down,
Upper side, lower side, front side, rear side of the rack L (outer side 4 of the rack L
Since it passes through the surface) and goes around to the back side of the heat exchanger 5, the cool air can be convectively circulated in the freezer 2 very efficiently. Incidentally, here, shield plates T as shown in FIG. 2 are attached to the front and rear in the storage direction of the rack L so that cool air does not escape to the left and right. The wind speed passing between the racks L is about 20 m when the frozen object is not placed on the shelf M.
/ Sec, but the wind speed can be adjusted by the operation panel surface 13a.
Since the temperature of the coolant is lower than the air temperature in the freezer 2, the air temperature in the freezer 2 is rapidly cooled and the air in the freezer 2 becomes 0 ° C. to −70 ° C. Liquefied carbon dioxide gas or liquefied nitrogen gas is used as the coolant.

When the spraying of the cooling agent into the freezer 2 is completed, the amount of gas inside the freezer 2 increases due to the air and the cooling agent, but the temperature in the freezer 2 becomes 0 ° C. or less. When
By repeating the series of operations of opening and closing the door 10 and introducing the outside air, and opening the damper D by the rising internal pressure due to the introduction of the outside air to evacuate and spraying the coolant,
Coolant is intermittently supplied to the freezer 2 by spraying,
In other words, it becomes a state of breathing, so that the heat (plus heat) of the frozen object can be efficiently released to the outside of the refrigerator, and when the frozen object K is close to the ice crystal formation zone, the door 10 is opened and closed. By exhausting the gas in the cold storage and introducing the outside air, the pressure in the cold storage is rapidly reduced, and the cooling gas is sprayed and supplied into the cold storage so that the ice crystal production zone can be passed in a short time. Therefore, quick freezing is possible while maintaining the freshness of the frozen object K. When the food disinfectant supply nozzle is provided, the spray supply of the food disinfectant is performed before the freezing target K is frozen, for example, before the rack L is stored or immediately after the rack L is stored. Within 2
It may be performed when the supply of the coolant is stopped. Also,
The supply time and timing of the sterilizing agent from the supply nozzle may be set by a timer to automatically supply the sterilizing agent. The spray supply of the bactericide, together with the ceramic surface 4 from which far infrared rays are emitted, can effectively perform sterilization in the freezer 2, sterilization, and sterilization of frozen objects.

In the freezing in the quick freezer, the temperature of the central portion of the object K to be frozen is constantly measured by the core temperature sensor 12, and the time required for the central portion to pass through the ice crystal formation zone and the freezing Since the measured time is measured and recorded,
The freezing condition of the target and the end point of freezing can be extremely easily and quickly determined by the data relating to the inside temperature, the central temperature, the door opening / closing circuit, the timing data, and the coolant spray data. Therefore, based on the temperature data of the central portion of the frozen object K detected by the core temperature sensor 12 and the like, the timing and time for spraying the coolant from the spray nozzle 8 are determined by the timer on the operation panel surface 13a. Can be set for freezing work. This is because, depending on the type, size, weight, etc. of the frozen object K, the time when the center of the object approaches the ice crystal formation zone or the time when it passes through the ice crystal formation zone is different depending on the object. De
It is useful for obtaining data.

The food thus frozen is 15 ° C.
If it is naturally thawed at a room temperature of about -25 ° C, it is restored to the state before it is frozen, so that the person who eats it can enjoy the same taste as ordinary cooked rice, sushi, sashimi and the like. If you need to thaw quickly, put it in the thaw and thaw it, or 3
You may make it thaw by immersing in hot and cold water of about 7 degreeC.

Next, referring to FIG. 4, a quick freezer as another example of the present invention will be described. The freezing method and the sterilization / sterilization treatment method in the quick freezer shown in FIG. 4 are substantially the same as those of the quick freezer shown in FIGS. 4 is a tunnel-type continuous system (hereinafter referred to as a tunnel system), and in the quick-freezers of FIGS. 1 to 3, the core temperature sensor is mainly used. The timer and the timer make it possible to set the spray supply timing of the coolant.
In the quick freezer shown in Fig. 4, a timer is used based on the data accumulated according to the type, size, weight, etc. of the frozen object.
The difference is that the timing and time for supplying the coolant spray are set. Below, it demonstrates focusing on the apparatus structure for continuous freezing in the quick freezer shown in FIG.

In FIG. 4, 20 is a tunnel type quick freezer having a two-tiered structure, 21 is a tubular freezer in the freezer 20, 22 is a rack outlet of the freezer 21, and 23 is also the front. Rack entrance, 24 is a sliding rear door that opens and closes the rack exit 22, 25 is a sliding front door that opens and closes the rack entrance 23, 26 is a vertical opening / closing device for the front door 25, and 27 is a rear door 24
Of the vertical opening and closing device, 28 is a rack rack for accommodating foods to be frozen in a shelf form, 29 is a rear lift device arranged behind the rear door 24, and 30 is arranged in front of the front door 25. Front lift device, 31 is a guide rail provided between the rear lift device 29 and the front lift device 30, and 32 is in front of the front lift device 30 and the rack rack 28 is placed in the freezer 21. It is a pushing-in device. The quick freezer 20 shown in FIG. 4 is of a size capable of accommodating four racks 28 in a row in the front and rear in the freezer 21, and the size thereof depends on the number of racks to be accommodated side by side. Can be set arbitrarily.

Thus, in the quick freezer 20 shown in FIG.
With the four racks 28 accommodated and the front and rear doors 23 and 22 closed, the freezing target is reduced by cooling the air in the freezer 21 by a heat exchanger (not shown). It is rapidly cooled by a coolant spray-supplied from a spray nozzle (not shown) into the freezer 21 in a depressurized state and frozen in a short time. The interior wall surface of the freezer 21 is coated with ceramics (not shown) that emits far-infrared rays.
The temperature inside 21 can be kept uniform, frost does not form on the inner wall surface, and if a nozzle for spraying and supplying the food disinfectant is provided, it will be compatible with the food disinfectant supplied from this nozzle. Therefore, it is possible to effectively sterilize and sterilize the freezer 21.

In the freezer 20 shown in FIG. 4, when the temperature sensor (not shown) causes the temperature of the air in the freezer 21 to fall below 0 ° C., the front and rear doors 25 and 24 are opened and closed by the opening / closing device 27. , 26, but the opening and closing timings of the front and rear doors 25, 24 can be arbitrarily set by a timer. When front and rear doors 25 and 24 are opened and closed Front and rear rack loading / unloading entrance 23,
The outside air enters the freezer 21 from 22 and the damper opens to increase the volume of the freezer 21 and the air, the coolant, and the sterilizing agent are exhausted to the outside from the exhaust unit 33. Also, the front and rear doors 25 and 24
When opened, the shelf rack 28 positioned by the front lift device 30 in front of the rack carry-in port 23 in the state of containing the foodstuff to be frozen is placed in the freezer 21 by the pushing device 32. The shelf rack 28 after being pushed in and freezing is pushed out from the rack outlet 22 onto the rear lift device 29.

A rack rack extruded from the rack outlet 22
28 is lowered onto the guide rail 31 by the rear lift device 30, and the frozen food material is extruded onto the carry-out conveyor 34 by the tray extruding device 36. The empty shelf rack 28 is conveyed to the rear lift device 31 by the guide rail 31, and after a new object to be frozen is accommodated by the carry-in conveyor 35 and the tray push-out device 37, it is placed in front of the rack carry-in port 23. Positioned.

In the quick freeze store 20 shown in FIG. 4, the time during which the center of the frozen object approaches the ice crystal production zone by the core temperature sensor or the like in the rapid freezers shown in FIGS. Since the data such as the passing time and the freezing end time are recorded together with the type, size, and weight of the frozen object, the opening / closing timing of the door and the coolant according to the frozen object are recorded based on this data. The spray supply timing and time can be set by a timer (not shown), and a large amount of frozen objects can be automatically and rapidly frozen.

The freezer 20 shown in FIG. 4 has a two-tiered structure, but in addition to this, the circulation device for the rack rack 28 is arranged on the same plane as the freezer 21. Good. For example, the guide rail may be annularly connected to the rack carry-in / out port of the freezer.

[0027]

The present invention is as described above, and the batch type quick freezer of the present invention is designed so that cold air can be convectively circulated in a freezer having a heat exchanger for cooling the inside of the freezer. Along with the formation, an appropriate number of nozzles that spray the coolant in a spray form, and a fan that sucks the spray-shaped coolant sprayed from the nozzles and sprays it onto the frozen object stored in the freezer.
The door is opened and closed based on the measurement of the air temperature in the freezer by a temperature sensor, and an exhaust unit with a damper for exhausting excess air and coolant in the freezer is provided. It is possible to take in fresh outside air to breathe the frozen object, and when sterilization and sterilization is performed, the inside of the refrigerator is rapidly depressurized when the ice crystal formation zone is approached and the ice crystal formation zone is shortened. Since it can be passed through in a short time and frozen rapidly, it is extremely effective when applied to freezing cooked rice and freezing sashimi, raw sea urchin, white fish, matsutake mushrooms and the like.

Further, in the batch type quick freezer of the present invention, it is possible to freeze the object to be frozen according to the type, size and weight of the frozen object by the operation of the operation panel surface by the combination of the core temperature sensor and the timer. Therefore, there is an effect that the amount of refrigerant gas or cooling used can be small.

Further, according to the rapid freeze store of the tunnel type of the present invention, the opening / closing timing of the door and the object to be frozen by the timer are based on the data obtained by the core temperature sensor in the batch type quick freeze store. It is possible to set the spray supply timing and time of the coolant according to the type, size and weight of the food, and to freeze a large amount of foodstuffs continuously and in a short time automatically. be able to. Further, in the present invention, since the food material is placed on a rack having a plurality of shelves and continuously frozen, it is possible to perform a large amount of freezing processing as compared with a belt conveyor type continuous freezer.

In addition, in both the batch system and the tunnel system quick freeze store of the present invention, since the inner wall surface thereof is formed of a ceramic surface that emits far infrared rays, it is possible to maintain a uniform temperature inside the store. It is extremely easy to use as it does not freeze and does not frost.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an example of the implementation of the quick freezer of the present invention.

FIG. 2 is a right side view of a part of the quick freezer shown in FIG.

FIG. 3 is a left side view of a part of the quick freezer shown in FIG.

FIG. 4 is a side view of another quick freezer according to the present invention.

[Explanation of symbols]

 1 Stand 2 Freezer 3 Heat Insulating Material 4 Ceramic Surface 5 Heat Exchanger 6 Axial Flow Fan 7 Drive Source 8 Spray Nozzle 9 Exhaust Section 10 Door 11 Handle 12 Core Temperature Sensor 13 Operation Section D Damper-L Rack K Freezing Object R Caster 20 Quick freezer 21 Cylindrical freezer 22 Rack carry-out port 23 Rack carry-in port 24 Sliding rear door 25 Sliding front door 26, 27 Door vertical opening / closing device 28 Shelf rack 29 Rear lift device 30 Front lift device 31 Guide rail 32 Pushing device

Claims (5)

[Claims] 1. A freezer having an inner wall surface formed of a far-infrared radiation ceramic surface, a heat exchanger for cooling the inside of the freezer, and a fan for sucking and convecting the cool air in the inside of the freezer are spaced from the inner wall surface at appropriate intervals. And the front sides are opposed to each other and arranged at appropriate intervals, and on the side of the heat exchanger, an appropriate number of spray nozzles for spraying the coolant in a spray form are provided substantially along the front surface of the heat exchanger. When the internal pressure becomes a certain value or more, an exhaust part with a damper that operates on the exhaust side by the internal pressure is formed, and a temperature sensor that detects the temperature inside the refrigerator and the temperature at the center of the frozen object are detected. A core temperature sensor is provided, and a door is provided between the heat exchanger and the fan for loading and unloading a shelf-shaped rack containing a frozen object, and the door of the freezer is once opened and closed. By taking the outside air into the storage A cooling agent from the nozzles inside the storage by operating the air so that the cooled air in the storage is exhausted from the exhaust section and the newly taken air is cooled to bring the inside of the storage into a depressurized state. The operation of spraying and supplying, the operation of opening the door to introduce outside air into the refrigerator, and the series of operations of automatically exhausting excess gas in the refrigerator from the exhaust section by the action of the damper are performed at appropriate intervals. A quick freezer characterized by having done. 2. When freezing an object to be frozen by performing each operation of spray supply of a coolant, introduction of outside air into the refrigerator, and gas exhaust in the refrigerator, the operation timing and time are recorded, and
The core temperature sensor records the time taken for the central part of the frozen object to pass through the ice crystal formation zone, and based on these recording results, the spray supply of the coolant according to the frozen object, the timing of suspension,
The quick freezer according to claim 1, wherein the time and the opening / closing timing of the door are set in a timer, and the respective operations are performed according to the set time. 3. An entrance / exit having a front door and a rear door, respectively, and having a size capable of accommodating a plurality of racks for storing objects to be frozen side by side in a row and forming an inner wall surface on a far-infrared radiation ceramic surface. In the cylindrical freezer, a heat exchanger for cooling the inside of the freezer and a fan for sucking and convection the cool air in the inside of the freezer are provided with the back sides at appropriate intervals from the inner wall surfaces, and the front sides are opposed to each other. Arranged with a space that can be accommodated between them, on the side of the heat exchanger, an appropriate number of spray nozzles for spraying the coolant in a spray form are provided substantially along the front surface of the heat exchanger, and the pressure inside the chamber is constant. When the above is reached, a temperature sensor that forms an exhaust part with a damper that operates on the exhaust side by the internal pressure and that detects the temperature inside the refrigerator, a timer that sets the timing and time of the coolant spray supply, and a freeze Freeze close to the refrigerator The shelf rack that stores items is pushed inward from the rack loading port in synchronization with the opening and closing of the front and rear doors, and the shelf rack that is pushed out from the rack loading port is loaded with frozen objects. A quick freezer, which is provided with a circulation device positioned in front of the carry-in port. 4. The circulating device comprises a lift device for raising and lowering a rack rack arranged at a position close to the front and rear doors of the cabinet body, and a guide rail arranged between the front and rear lift devices.
The quick freezer according to claim 3, which comprises a container and a device for replacing an object to be frozen. 5. A plurality of food sterilizing agent supply nozzles are provided in the freezer, and the sterilizing agent is spray-supplied by the nozzles into the refrigerator in a state where the spray supply of the coolant is stopped. The quick freezer of any one of 1 to 4.