JP2852300B2 - Quick freezer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freezer for freezing and storing foodstuffs. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freezer that keeps moisture in a natural state and hardly causes frost on a cooler, and a method of freezing the same.

[0002]

2. Description of the Related Art Generally, a freezer is provided with a freezer in which a cooler, a fan, and food are arranged in a closed chamber. Conventional freezers, whether for business use or for home use, adopt a forced circulation system in which cooling air blown out by a fan passes through a cooler through a freezing chamber and is blown out again by a fan. That is, the dry cooling air blown out from the fan cools the food in the storage room and raises the temperature, and at the same time, forcibly evaporates the moisture in the food to become humid.
This heated and humid air is cooled by passing through a cooler and refluxing,
In addition, frost is inevitably formed on the cooler by taking in moisture. Again, the air that has been dried and cooled is blown into the freezer compartment by a fan and forcedly circulated. After a lapse of a predetermined time, the chiller is stopped and defrosted by a nearby heater in order to remove frost adhering to the cooler. After the defrosting, the operation enters the freezing operation again, and this process is repeated. In addition, a suction port for guiding air to the cooler is provided together with a blow port on the front of the fan to generate a laminar general circulation of air in the freezing compartment.

[0003]

Therefore, the conventional freezer has the following disadvantages. First, since the air blown into the freezer compartment is always dry cooling air, moisture is forcibly evaporated from the surface before the surface of the food is frozen, and the food itself is dried during freezing. Further, even after freezing, the dry cold air removes water from the ice surface due to the sublimation pressure. In other words, the mechanism is such that the circulating air flow extracts moisture in the food material and moves and solidifies it on the cooler surface. When the frozen food is thawed, the flavor before freezing has completely disappeared. As a countermeasure, foods may be packaged and frozen. However, if the foods lose their shape when packaged, such as cakes, it becomes difficult to store them frozen. In addition, a device that forcibly humidifies the dry air that has passed through the cooler has also been devised, but this not only complicates the device, but also increases the amount of frost that forms on the cooler, thereby reducing cooling efficiency. Inviting.

Secondly, it is necessary to periodically defrost the frost adsorbed and solidified in the cooler, and a defrosting device such as a heater must be attached, resulting in a complicated device. In addition to such equipment problems, essential problems arise in frozen foods. That is, when the temperature in the freezing room rises during defrosting, the fine ice crystals in the frozen food partially melt, and are sucked by other fine ice crystals to accelerate the growth of ice crystals and grow into large crystals. I do. For example, when this phenomenon occurs in the cells of a food material, cell rupture occurs in a microscopic and macroscopic region, and the foodstuff itself changes qualitatively. Foods stored for a long period of time due to repeated freezing and defrosting cycles are greatly damaged.

Third, since the laminar general circulation in the freezer compartment is a very orderly flow, the contact time between the cooling air and the food is short, and the heat exchange rate between the food and the cooling air is relatively poor.
Difficult to quick freeze. Fourth, rapid cooling of high-temperature ingredients, such as freshly baked bread, has heretofore been impossible. The reason is that when hot food is placed in the freezer compartment, the circulating cooling air immediately rises in temperature, and when this hot air returns to the cooler, the refrigerant (for example, chlorofluorocarbon) bumps and overloads the compressor. , Thereby causing a failure. Therefore, it has been common knowledge that high-temperature ingredients are cooled to room temperature in the atmosphere and then frozen.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the gist of a quick freezer in which frost hardly adheres to the cooler according to the present invention is described. A cooler is erected on one side wall side of the storage room to form a cooling room, a fan is arranged in front of the cooler, a space in front of the cooler is used as a freezing room, and cooling air blown into the freezing room by the fan. After flowing, it is sucked by the fan without flowing back through the inside of the cooler and is blown out to the freezer again, and the cool air cooled by the cooler is cooled by natural convection.
And pushed out to the freezer by a fan.
Is characterized by the fact that More preferably, for energy saving until a predetermined cooling temperature rapidly cooled by driving the cooling unit and fan, it maintains that temperature by driving only then stopping the fan cooler.

That is, the quick freezer of the present invention has an opening / closing door.
A storage room sealed by a heat insulating box having
A cooler erected along one side wall, and a front face of the cooler
And a cooling fan in a space in front of the fan.
A freezer including a freezing compartment, wherein the fan is connected to the freezing compartment.
Cooler that is set to blow toward
No forced circulating air flow is blown into the
The cool air pushed to the front by natural convection
And sent out to the freezer. The main source
In the light quick-freezer, the cooler has a substantially rectangular shape when viewed from the front , and a substantially diagonal line of the upper half surface of the front of the cooler.
Two fans arranged in opposite directions, and substantially flat with the diagonal direction.
Arranged in a row in a substantially diagonal direction of the lower half of the front surface of the cooler.
Two fans and the upper half and lower half are approximately square
And the fan is about one-quarter of the upper half or lower half
Blows into the freezer with a size corresponding to the product
It is preferable to set as follows. The present invention
In the quick freezer of the above, the cooler has a substantially rectangular shape when viewed from the front , and a substantially diagonal direction of an upper half surface of the front of the cooler.
And two lower fans, and a lower half of a front surface of the cooler.
Two diagonally arranged fans and the upper half surface
And the lower half is almost square and the fan is the upper half or
It has a size corresponding to approximately one-fourth the area of the lower half surface and
It is preferable that air is blown toward the freezing chamber.
Good. In the quick freezer of the present invention,
Vessel is substantially square when viewed from the front,
And two fans arranged substantially diagonally to each other.
The fan is large enough to cover approximately one-fourth the area of the front of the cooler
And is set to blow air toward the freezer compartment.
Preferably. Further, the quick freezer of the present invention
A plurality of guide rails on the inner surface of
Tray for placing food between the guide rails.
And the rear end of the tray on the fan side is
An opening is formed, and the front end of the tray on the door side is
It is preferable to be sealed. In addition, the rapid
In the freezer, the cooler faces the open / close door in the compartment.
After the floor is set up from the floor to the ceiling
Is preferred. Further, in the quick freezer of the present invention,
Is along the wall after the cooler faces the open / close door in the storage room.
The wall panels on both sides are separated by the same width as the cooler.
It is preferable that they are provided to face each other. Also the book
In the quick-freezer of the invention, forced circulation to the back of the cooler
It is preferable not to provide a suction port for sucking air flow.
No. In the quick freezer of the present invention, a cooler and
Drive the fan and cool the freezer compartment to the specified cooling temperature.
After the freezing compartment is cooled to a predetermined cooling temperature,
The cooling is stopped and the predetermined cooling is performed by intermittent control of the cooler.
It is preferable to provide control means for maintaining the temperature. Also
In the quick freezer of the present invention, in the steady state
Does not require a heater input to defrost the cooler.
No. Here, the "steady state", state that you are using to Normal
Is shown. However, if the user leaves the door open for a long time,
If an abnormal situation such as water splashes on the cooler
The refrigerator may become frosted.
A heater may be input for defrosting.

[0008]

The present invention is configured as described above.
The air in the freezer compartment and the air in the cooling compartment are mutually forcedly circulated.
There is no heat exchange by the ring air flow . Therefore, when the cooler and the fan are started, a large amount of cooling air in the cooler is blown into the freezing chamber, and instantaneously freezes the moisture on the food material surface to form a thin ice barrier over the entire surface. Circulating air flow from the freezer compartment is not placed in a cooler actively, in front of the cooling chamber
Suck in with the suction power of the fan provided and blow it back into the freezer compartment
And then repeat this cycle. That is, the cooling chamber
The cool air cooled at the lower side of the cooling chamber by natural convection
And the warm air flows above the cooling chamber by natural convection.
And the whole is cooled mainly by natural convection
You. Natural convection has a slow
Even if the air enters the upper part of the cooling chamber,
Is cooled rapidly, and the warm air including moisture is directly cooled.
Contact with the vessel is prevented. So the cooler
Frost hardly adheres. Flow to the front side of the cooling chamber and push
The released cool air is blown into the freezer compartment by a fan.
You. As a result, first, the air in the freezer compartment immediately reaches the saturated vapor pressure with the moisture evaporated from the foodstuffs, and the air saturated with this moisture circulates in the freezer compartment, so that the evaporation of the water stops.
Drying of the food can be almost completely prevented, and the flavor of the food after thawing hardly changes. Second, the cooling chamber has a fan.
The forced circulating air flow is not
Moisture relatively large amount generated from wood can not enter the aggressive, frost and defrosting in difficult steady state arrive to a cooler
You don't have to . Therefore, since there is no temperature rise in the freezer compartment due to the heater for defrosting, there is no crystal growth of fine ice crystals in the food, and the metamorphosis of the food can be prevented. Third, cold
Large volume of却器is compared to a normal freezer, deer also quick-frozen foodstuffs from blow cooling air at full <br/> § down,
Ice crystals in food can be miniaturized and the food can be frozen and stored in its natural state.

Fourth, in the freezer compartment, the incident flow from the fan collides with the reflected flow from the wall or the plate of the tray and is in a turbulent state, and the turbulent flow has a long contact time with food. Therefore, the heat exchange efficiency is extremely high, and it is suitable for quick freezing.
Fifth, this apparatus can easily cool high-temperature foodstuffs quickly. Even if hot food is placed in the freezer, the hot air in the freezer does not forcibly return to the cooler, so that the refrigerant does not bump. Heat exchange between freezing room air and cooling room air
The exchange is performed mainly by natural convection.

[0010]

1 and 2 are a side longitudinal sectional view and a front longitudinal sectional view showing an embodiment of the present invention. A storage room 6 as an internal space is hermetically formed by a heat insulating box 4 having upper and lower opening and closing doors 2 and 2 disposed on a front surface. A partition plate 8 is arranged at the center of the storage room 6 and divides the front of the storage room 6 into two vertically. From the floor surface 12 to the top surface 1 along the rear wall surface 10 of the storage room 6
A cooler 16 is erected on the side 4. The cooler 16 has a rectangular shape in front, and is designed to have a length: width ratio of about 2: 1. Of course, the aspect ratio can be freely changed according to the design.
The compartment in which the cooler 16 is located is the cooling compartment 18 and the compartment in front thereof is the freezing compartment 20, and the boundary between the air layers of both compartments is indicated by the dashed line in the figure. In this embodiment, there are two freezing chambers 20 above and below due to the partition plate 8.
The upper half surface and the lower half surface of the front surface of the cooler 16 have a substantially square shape, and two fans 22, 22 are arranged in a diagonal direction of the upper half surface. Similarly, two fans 22, 22 are also arranged in a diagonal direction of the lower half surface. 22 are arranged. When the partition plate 8 exists, the upper and lower diagonal directions do not need to be the same, but when there is no partition plate 8, the same direction is required. The size of one fan 22 is designed to correspond to, for example, approximately one quarter of the square shape of the upper half surface. As is clear from FIG. 2, the side plates 24, 24 extend along the left and right side walls in the storage room 6.
Are erected with the partition plate 8 interposed therebetween. Side plates 24, 2
The separation distance of 4 is designed to be substantially the same as the width of the cooler 16, but the design can be freely changed. A large number of guide rails 26 are provided on the inner wall surfaces of the side plates 24, 24 in a horizontal direction so that a tray described later can be equipped. Although not shown, a safety grid plate or a coarse mesh plate may be arranged on the front surface of the fan 22.

The operation in the state shown in FIGS. 1 and 2 will be described.
When the fan 22 is driven by operating the cooler 16, a large amount of cooling air in the cooling chamber 18 is blown into the freezing chamber 20 . The air incorporated can blow is reflected by the inner surface of the door 2, the reflected air flow and said incident air flow repeatedly collide with freezer chamber 20, the air flow of the refrigerating compartment becomes macroscopic turbulent. As shown, the air flow circulating in a turbulent state is sucked from the side and back surfaces of the fan 22 and is blown out into the freezing room 20 again. In the present invention, no suction port for sucking the air flow to the back of the cooler 16 is provided.
The reason why the distance between the side plates 24, 24 is designed to be substantially the same as the width of the cooler 16 is to eliminate a gap for wraparound. Therefore, the airflow blows back to the front of the cooler 16 and is re-sucked and blown out by the fan 22. Cooled by the cooler 16 in the cooling chamber 18
The cold air is pushed out to the lower front by natural convection,
It is sent out to the freezing room 20 by 22. Cooling room 18
The warm air enters by the natural convection above the cold air.
Therefore, cooling is performed mainly by natural convection as a whole. In addition, forced circulating air flow from the fan is sent into the cooling chamber.
So it is generated in relatively large amounts from the ingredients at the beginning of freezing
Moisture does not actively enter, the water vapor in the freezing chamber hardly adheres to the cooler, and the defrosting device of the cooler 16 becomes unnecessary.
You.

The temperature of the blown cooling air rises in the freezing chamber 20, but when it is sucked by the fan 22, it is pushed to the front by natural convection from inside the cooling chamber 18 near the boundary surface.
It is cooled by heat exchange with cold air, and blown into the freezing chamber 20 again by the fan 22 . That is, heat exchange occurs near the dashed line in FIG. As can be seen from FIG.
The size of 2 is designed to be approximately a quarter of the square shape of the upper half or lower half of the cooler. This is just a good size to suck the air circulation flow from the boundary of the cooling chamber with a fan. However, depending on the horsepower or capacity of the fan, the size of the fan and the distance between the side plates can be changed. The two fans 22 are arranged in a diagonal direction in order to blow an incident air flow over the entire surface of the substantially square freezer compartment 20, and may be installed in a diagonal direction in the opposite direction. Two fans are also arranged diagonally in the same direction in the lower freezer compartment 20.

When food (not shown) is placed in the freezer compartment 20, the following effects are obtained. The food starts to be cooled by the blowing of the cooling air at the time of starting, and a thin ice film, that is, an ice barrier is formed on the surface of the food in a short time. Reach saturated vapor pressure. Further evaporation of water is prevented by the ice barrier and saturation, and the freezing gradually proceeds inside. Further, since the capacity of the cooler 16 is larger than that of the freezer compartment 20, and the cooling air is blown by the four fans 22, the food can be rapidly frozen, and the ice crystals in the food are miniaturized and the food is frozen and stored in a natural state. it can. Since defrosting of the cooler is unnecessary, there is no temperature rise by the heater, the micro-state of ice crystals in the food can be maintained in the freezing room, and the denaturation of the food can be prevented. Further, since the air flow in contact with the food is turbulent, the contact time with the food is longer than in the conventional laminar flow, and the food can be frozen rapidly. In addition, high-temperature ingredients such as freshly baked bread can be frozen at a high temperature. That is, even if the air in the freezing room 20 becomes high in temperature, it does not flow back to the cooler 16, so that no failure of the refrigerator is caused.

FIG. 3 is a perspective view of a tray 30 on which foods are placed. The tray 30 is formed by suspending a stop plate 34 at the front edge of the bottom plate 32, a regulating plate 36 at both side edges, and a haki plate 38 at the rear edge. A handle 40 is attached to the hachi plate 38 in a folded state. The height of the Hachi plate 38 is the guide rail 26, 2
The height of the stop plate 34 is set to be substantially equal to the interval between 6 and lower than that.

FIG. 4 shows that the tray 30 is connected to the guide rails 26 and 2.
It is a side surface longitudinal cross-sectional view of the freezer in the state loaded between six. It can be seen that the front surface is hermetically shut off by the hachi plate 38 and an opening 42 is formed in the upper part of the stop plate 34 at the rear. Food ingredients 44 are placed on the tray.

FIG. 5 is an enlarged explanatory view of a main part of FIG. When a large number of trays 30 are loaded in the freezer compartment 20, the bottom plate 3 of the tray 30 replaces the large freezer compartment 20 in FIG.
A large number of small freezing compartments 46 are formed, which are partitioned by 2, 32 and the plate 38. The small freezer 46 by the fan 22
When the cooling air is blown into the inside, the turbulence finer than that in FIG. At the same time, Karman vortex-like turbulence is generated in the incident air flow at the upper edge of the stop plate 34, thereby promoting the formation of the collision turbulence. Therefore, compared with the freezing room 20 of FIG.
Quickly reaches the saturated state of water vapor, and the evaporation of water from the food material 44 can be cut off. Further, the heat exchange efficiency between the cooling air and the food material 44 is increased by the finer turbulent flow, the freezing speed can be increased, and the state of a finer ice crystal can be approached. Therefore, the ingredients can be preserved in their natural state. Other functions and effects are the same as those in FIG.

The method of actually operating this freezer includes three steps. That is, the tray 30 on which the food material 44 is placed
A first step of disposing in the freezer compartment 20;
And a second step of continuously driving the fan 22 to cool the freezer compartment to a predetermined temperature, and then a third step of stopping the fan 22 and maintaining the predetermined temperature by intermittent control of the cooler 16. FIG. 6 shows baked rice cakes and raw grass rice cakes as ingredients 44.
FIG. 8 is an actual operation record diagram when the apparatus is placed on a tray. The final temperature is -45 ° C. First, the freezer compartment is cooled to -45 ° C empty. After the door 2 is released and the tray 30 is loaded, the door 2 is immediately sealed. Therefore, the temperature in the refrigerator rises to -22 ° C, and the foodstuffs start at room temperature. When the cooler 16 and the fan 22 are continuously driven and rapidly frozen, the baked rice cake passes through the maximum ice crystal formation zone of -1 ° C to -5 ° C in about 13 minutes, and the raw grass rice cake passes in about 20 minutes. It takes 40 minutes for baked rice cake and about 55 minutes for raw grass rice cake to reach -45 ° C or less. At that time, the temperature in the refrigerator was already -50.
℃ or less. Then stop the fan 22 and
Freezing room temperature-
The cooler 16 is intermittently automatically controlled so as to be maintained at around 45 ° C. That is, when the fan is stopped, it functions as a cool box. Since the fan is stopped, the interior of the compartment is cooled and maintained in a natural convection state. However, since the food is completely frozen and the sublimation pressure at a low temperature of -45 ° C is extremely small, there is almost no evaporation of water from the food, and no frost forms on the cooler 16. The reason why the baked rice cake reaches the low temperature earlier is because the moisture content is lower than that of the raw rice cake. If the capacity of the fan 22 and the cooler 16 is increased, the cooling rate is further increased, and so-called ultra-high-speed refrigeration is also possible. Although it is extremely effective to keep the natural state of foodstuffs as short as possible from the above-mentioned maximum ice crystal formation zone, that is, the time from surface freezing to deep freezing, this freezer is sufficient for the demand for ultra-high speed freezing. Can be met.

FIG. 7 is a front vertical sectional view showing another embodiment of the present invention. The cooler 16 has a substantially square front surface, and two fans 22, 22 are arranged in a diagonal direction thereof. The size of one fan 22 is approximately one-fourth the size of the front of the cooler, and cooling air is blown over the entire surface of the freezing compartment 20 by the blowing of the two fans. Since the operation and effect are the same as those of the above-described embodiment, the details are omitted.

The present invention is not limited to the above-described embodiment, but encompasses various modifications and design changes within the technical scope thereof without departing from the technical concept of the present invention.

[0020]

As described above, the present invention has the following advantages. The cooling chamber cooler
The cooled air is pushed out to the lower front by natural convection.
It is sent to the freezer by a fan. Above the cooling room
The warm air enters by natural convection as much as the cold air is pushed out
Therefore, cooling is performed mainly by natural convection as a whole. cold
Do not send forced circulating airflow from the fan
Water generated from relatively early food ingredients
Does not enter actively, and the water vapor in the freezer compartment is
Difficult to adhere. In addition, a thin ice film, that is, an ice barrier, is formed on the surface of the food material by spraying the cooling air at the time of starting, and at the same time, the freezing compartment immediately reaches saturation due to evaporation of water from the food material. Further evaporation of water is prevented by the ice barrier and the saturation, and the freezing gradually proceeds inside without deterioration of the food material. Is relatively large volume of the or cold却器teeth <br/> or also flash frozen foodstuffs from blows cooling air fan, freezing pristine state ingredients and micronized ice crystals in the food Can be saved. Since defrosting of the cooler is unnecessary, there is no temperature rise by the heater, the micro-state of ice crystals in the food can be maintained in the freezing room, and the denaturation of the food can be prevented. Further, since the air flow in contact with the food is turbulent, the contact time with the food is longer than in the conventional laminar flow, and the food can be quickly and efficiently frozen. In addition, high-temperature ingredients such as freshly baked bread can be frozen at a high temperature. That is, it is possible to provide a freezer and a freezing method that are extremely useful in industry, such as that the air in the freezer compartment does not return to the cooler even when the temperature of the freezer becomes high, so that the refrigerator does not fail.

[Brief description of the drawings]

FIG. 1 is a side longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a front vertical sectional view showing an embodiment of the present invention.

FIG. 3 is a perspective view of a tray on which food materials are placed.

FIG. 4 is a side longitudinal sectional view of a freezer in a state where a tray is loaded between guide rails.

FIG. 5 is an enlarged view of a main part of FIG. 4;

FIG. 6 is an actual operation record diagram when food is placed on a tray.

FIG. 7 is a front vertical sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 2 Opening / closing door 4 Insulated box 6 Storage room 8 Partition plate 10 Rear wall surface 12 Floor surface 14 Top surface 16 Cooler 18 Cooling room 20 Freezer room 22 Fan 24 Side plate 26 Guide rail 30 Tray 32 Bottom plate 34 Stop plate 36 Control plate 38 Holding plate 40 Handle 42 Opening 44 Food material 46 Small freezing room

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Open to the public Showa 51-45665 (JP, U) Open to the public Showa 59-96572 (JP, U) Open to the public Showa 52-126467 (JP, U) Open to the public Showa 62- 122280 (JP, U) Shokai Sho 57-3993 (JP, U) Japanese Patent Publication No. 59-9040 (JP, B2) Japanese Patent Publication No. 58-48825 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) F25D 11/04 F25D 17/06 F25D 21/04

Claims (9)

(57) [Claims] A storage room closed by a heat insulating box having an opening / closing door, a cooler erected along a rear wall surface of the storage room, a fan disposed on a front surface of the cooler, A freezer having a freezer in the space in front of the fan,
The fan is set so as to blow air toward the freezing room and does not blow forced circulating airflow into the cooler, but uses the fan to cool the air cooled by the cooler and pushed out to the front by natural convection. And send it to the freezer
The shape of the cooler is substantially rectangular when viewed from the front,
Two diagonally arranged upper half surfaces of the cooler front surface
A fan, substantially parallel to the diagonal direction,
Two fans arranged substantially diagonally on the lower half,
The upper half and lower half are approximately square and the fan is upper half
Size corresponding to approximately one-quarter of the surface or lower half
A quick-freezer characterized by being set so as to blow air toward a freezer compartment . 2. A hermetically sealed box having an opening / closing door.
Storage room and cooling standing upright along the rear wall of the storage room
, A fan arranged in front of the cooler, and the fan
A freezer with a freezer in the space in front of the
The fan is set to blow toward the freezer
And a forced circulating air flow inside the cooler.
Without being cooled by the cooler and pushed forward by natural convection.
Cool air is sent to the freezer using the fan.
The shape of the cooler is substantially rectangular when viewed from the front, and two fans arranged substantially diagonally in the upper half surface of the cooler front surface and diagonally arranged in the lower half surface of the cooler front surface And the upper half and the lower half are substantially square, and the fan is approximately one-fourth of the upper half or the lower half.
A quick freezer having a size corresponding to the area of the air conditioner and set to blow air toward the freezer compartment. 3. A hermetically sealed box having an opening / closing door.
Storage room and cooling standing upright along the rear wall of the storage room
, A fan arranged in front of the cooler, and the fan
A freezer with a freezer in the space in front of the
The fan is set to blow toward the freezer
And a forced circulating air flow inside the cooler.
Without being cooled by the cooler and pushed forward by natural convection.
Cool air is sent to the freezer using the fan.
The shape of the cooler is substantially square when viewed from the front, and two fans arranged substantially diagonally on the front of the cooler, and these fans have an area of approximately one-fourth of the front of the cooler. 2. The quick freezer according to claim 1, wherein the quick freezer has a corresponding size and is set to blow air toward the freezer compartment. 4. A plurality of guide rails are provided in a horizontal direction on the inner surface of the both side plates, and a tray on which food is placed is loaded between the guide rails. The quick freezer according to any one of claims 1 to 3, wherein a portion is formed, and a front end of the tray on the opening / closing door side is sealed by a gripping plate. 5. A cooler, rapid freezer according to any one of claims 1 to 4 formed is erected from the floor to the heavenly plane along the wall surface after facing the door of the refrigerator compartment. 6. A cooler is provided upright along a rear wall surface facing an opening / closing door in a storage room, and both side wall plates are opposed to each other with a separation distance of substantially the same width as that of the cooler. Item 6. The quick freezer according to any one of Items 1 to 5 . 7. A quick freezer according to any one of claims 1 to 6, not provided with a suction port for sucking back into the forced circulation air flow cooler. 8. A means for driving a cooler and a fan to cool the freezing room to a predetermined cooling temperature, and after the freezing room is cooled to a predetermined cooling temperature, stopping the fan and controlling the intermittent control of the cooler. The quick freezer according to any one of claims 1 to 7 , further comprising control means for maintaining the predetermined cooling temperature. In 9. steady state, rapid freezer according to any one of not requiring a heater input for defrosting the cooler claims 1-8.