JPH0712449A - Low temperature refrigerator - Google Patents

Abstract

PURPOSE:To enable a smooth loading or unloading of items to be carried out and a uniform cooling within a storing chamber to be carried out by a method wherein two doors are arranged at a front surface and a rear surface of the refrigerator, cold air is forcedly circulated within a cooling passage and at the same time a cold air circulating direction is reversed. CONSTITUTION:Since inner areas of storing chambers 31 and 32 are released to open in a forward or a rearward direction under a released state of each of doors 44 and 46, resulting in that the items can be loaded from one chamber and then unloaded from the other chamber. Accordingly, serving of cooked items and supplementing of these cooked items into the storing chambers 31 and 32 can be smoothly performed. In addition, interior areas of the storing chambers 31 and 32 are indirectly cooled from the upper, lower, right and left surfaces of thermal conducting boxes 21, 22 other than forward or rearward openings 7 and 8, resulting in that the cooked items stored in the storing chambers 31 and 32 can be well stored without being dried. In this case, a temperature of the cold air circulating within the cold air passage 39 shows the lowest value just after the cold air performs a heat exchanging operation with an evaporator 33. Accordingly, non-uniform temperature is apt to occur at the portions of the storing chambers 31 and 32, although the cold air circulating direction is reversed by air directing plates 51 and 52 arranged in the cold air passage 39, thereby an irregular temperature distribution in each of the storing chambers 31 and 32 can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention arranges heat conducting boxes in a heat insulating box at intervals and circulates cool air in the intervals to indirectly cool a storage chamber in the heat conducting box. It concerns low temperature storage.

[0002]

2. Description of the Related Art A conventional low-temperature storage of this type is, for example, Japanese Patent Application Laid-Open No. 3-102169 (F25) filed by the applicant earlier.
As shown in D17 / 08), the heat conducting box is arranged in the heat insulating box body opening at the front side with a space, and the inside of the heat conducting box serves as a storage room and also serves as the heat conducting box. The evaporator and the blower of the cooling unit are arranged in the space between the heat insulation boxes, and the cool air cooled by the evaporator is forcedly circulated within the interval by the blower to indirectly cool the storage chamber. ing.

According to such a low-temperature storage, since the inside of the storage chamber is cooled by the upper, lower, left, right and rear wall surfaces of the heat conducting box, and dry cold air does not directly enter the storage chamber, the drying of the storage chamber is suppressed. , Its humidity can be kept high.
Therefore, it was suitable for storing fresh foods and cooked dishes at low temperature without drying.

[0004]

By the way, in hotels, restaurants and the like, it is necessary to temporarily store the food prepared in the kitchen in the high humidity storage room until it is provided to the customer. However, since the conventional cold storage has been opened only on the front side, it is necessary to take out and store the cooked food from the same direction, which facilitates the provision of the food to the customer and the supplement of the food to the storage room. There was a problem that I could not do.

Therefore, if the front and rear surfaces of the cold storage are opened so that the food can be replenished in the storage room or taken out from the storage room in the front-back direction of the storage room,
It becomes possible to carry out the storing / removing work extremely smoothly.
However, if the front and rear sides of the heat conducting box are opened to realize such a configuration, the walls of the heat conducting box that indirectly cool the storage chamber are only the top, bottom, left, and right surfaces, so the entire storage chamber is uniformly cooled. There was a problem that it was extremely difficult to do.

The present invention has been made in order to solve the above-mentioned conventional technical problems, and in a so-called indirect cooling type low temperature storage, the operation of delivering articles is facilitated and the inside of the storage chamber is made uniform. Intended for cooling.

[0007]

That is, the low temperature storage 1 according to the invention of claim 1 has a heat insulating box 6 having openings 7 and 8 on the front and rear surfaces, and front and rear openings 7 and 8 of the heat insulating box 6. Doors 44 and 46 that can be opened and closed respectively, and openings on the front and rear surfaces,
It is arranged in the heat insulating box 6 with a space, and the inside is a storage chamber 3
1 and 32 heat conduction boxes 21 and 22, and this heat conduction box 2
1, a cold air passage 39 formed between the heat-conducting boxes 21 and 22 above and below and the heat insulating box body 6, and an evaporator 33 and a blower 34 of a cooling device arranged in the cold air passage 39. By forcibly circulating the cool air cooled by the evaporator 33 into the cool air passage 39 by the blower 34,
An air flow direction plate 5 for indirectly cooling the storage chambers 31 and 32 and for inverting the circulation direction of the cool air in the cool air passage 39.
1, 52 are provided.

Further, in addition to the above, the low temperature storage 1 of the invention of claim 2 is provided with a plurality of temperature detecting devices (sensors) 56 to 59 in the storage chambers 31, 32, and based on the output of each temperature detecting device. By controlling the wind direction plates 51 and 52, the cold air cooled by the evaporator 33 is circulated toward the high temperature portions in the storage chambers 31 and 32.

[0009]

According to the cold storage 1 of the invention of claim 1, the door 4
Since the interiors of the storage chambers 31, 32 are opened in the front-rear direction by opening the compartments 4, 46, articles can be stored in one side and taken out from the other side. Therefore, provision of items such as cooked dishes and supplementation to the storage chambers 31 and 32 can be smoothly performed. Further, since the insides of the storage chambers 31 and 32 are indirectly cooled from the top, bottom, left and right surfaces of the heat conducting boxes 21 and 22 other than the front and rear openings, articles such as dishes stored in the storage chambers 31 and 32. Can be satisfactorily stored at low temperature without drying.

Here, the temperature of the cold air circulating in the cold air passage 39 is the lowest immediately after the heat exchange with the evaporator 33. Therefore, the storage chamber in the upstream portion where the cold air is first circulated is cooled more strongly, and the cooling in the storage chamber in the downstream portion is weakened, so that the temperature inhomogeneity is not uniform due to the portions in the storage chambers 31 and 32. In the present invention, since the wind direction plates 51 and 52 are provided in the cold air passage 39, the wind direction plate 5 is generated.
By appropriately reversing the circulation direction of the cold air by 1, 52, the cooling action by the circulating cold air can be uniformly applied to the inside of the storage chambers 31, 32 via the heat conducting boxes 21, 22. Thereby, the occurrence of temperature unevenness in the storage chambers 31, 32 is prevented and the temperature is made uniform.
It is possible to satisfactorily cool and store food or the like at any position inside.

Particularly, according to the low temperature storage 1 of the invention of claim 2, in addition to the above, a plurality of temperature detecting devices (sensors) 56 to 59 are provided in the storage chambers 31 and 32, and the output of each temperature detecting device is provided. By controlling the air flow direction plates 51 and 52 based on this, the cold air cooled by the evaporator 33 is stored in the storage chambers 31 and 32.
Since it circulates toward the higher temperature inside, the evaporator 3
It is possible to circulate the cold air having a low temperature immediately after the heat exchange with the No. 3 to the high temperature portion in the storage chamber first, thereby more smoothly eliminating the temperature unevenness in the storage chambers 31, 32. become able to.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a vertical sectional front view of the low temperature storage 1 of the present invention, FIG. 2 is a vertical side view of the low temperature storage 1, FIG. 3 is a partially cutaway plan view of the low temperature storage 1, and FIG. is there. The low temperature storage 1 of the present invention is installed in, for example, a kitchen of a restaurant, and is constituted by a heat insulating box body 6 in which a heat insulating material 4 is filled between inner and outer boxes 2 and 3. The heat insulating box 6 has openings 7 and 8 at the front and rear, and one side portion of the ceiling wall 6A is projected upward to form a projecting portion 9 and the inside thereof is cooled downward. The chamber 11 is configured. The front and rear openings 7 and 8 of the heat insulating box 6 are vertically divided by partition members 12 and 13, respectively.
A mounting plate 14 is erected between the three to partition the inside of the heat insulating box 6 into upper and lower parts.

Inside the heat-insulating box body 6, upper and lower heat-conducting boxes 21 and 22 which are made of a heat-conductive material such as stainless steel and open at the front and rear are arranged at a predetermined distance from the inner surface of the heat-insulating box body 6. It is stored and arranged above and below. At this time, the lower heat conducting box 22 is located below the mounting plate 14 and is located on the bottom wall 6 of the heat insulating box 6.
It is fixed on the mounting plate 23 provided on the upper surface of B with a space between it and the bottom wall 6B, and the upper heat conducting box 21 is mounted on the mounting plate 14 by a mounting plate 24 with a space between it and the mounting plate 14. It is fixed. Further, the front and rear opening edges of the upper and lower heat conducting boxes 21 and 22 are in contact with the inner surface of the heat insulating box body 6, so that inside and below the heat insulating box body 6 and between the upper and lower heat conducting boxes 21 and 22. Isolated from the space between the heat conducting boxes 21 and 22, and
Upper and lower storage chambers 31 and 32 that are open to the front and rear are configured.

On the other hand, inside the cooling chamber 11, an evaporator 33 which constitutes a cooling device and blowers 34, 34 are housed and arranged below the evaporator 33. Wall 6A
Similarly, a compressor 36 and a condenser 3 which constitute a cooling device are provided above.
7 and a condenser blower 38 are installed. Further, through holes 14A, 23A, 24A are formed in both sides of the mounting plate 14 and the mounting plates 23, 24, respectively, so that between the upper and lower heat conducting boxes 21, 22 and the heat insulating box body 6. And a series of cold air passages 39 between the upper and lower heat conducting boxes 21, 22.
Is configured.

At the lower surface of the cooling chamber 11, the cold air passage 3 is provided.
The evaporator 33 communicates with 9 and forms a part of the cold air passage 39, and the evaporator 33 is arranged with a gap from the upper wall 9A of the overhang portion 9. Further, from the rear surface of the evaporator 33, the upper heat conducting box 21
A cover 41 is provided on the upper surface of the evaporator 33.
The lower cooling chamber 11 and the inside of the cool air passage 39 are partitioned into front and rear. Further, wind direction plates 51 and 52 are attached to the cool air passages 39A and 39B at positions corresponding to the lower sides of the cooling chamber 11, respectively.

The both wind direction plates 51 and 52 are, for example, two strip-shaped front and rear damper plates 51A, 51B, 52A and 52B which are connected at different angles and are rotationally driven by motors not shown. It is rotatably supported by a front-rear rotating shaft 51C or 52C. Among these, the damper plate 51A of the wind direction plate 51 located on the right side opens and closes the cool air passage 39A on the lower right side of the cooling chamber 11 and in front of the cover 41, and the damper plate 51B.
Opens and closes the cold air passage 39A behind the cover 41. Then, the wind direction plate 51 is rotated by the motor, the damper plate 51A closes the cold air passage 39A, and the damper plate 5
1B has the cold air passage 39A open and the damper plate 51.
A is configured so that the cold air passage 39A is opened and the damper plate 51B is switched to a state in which the cold air passage 39A is closed.

Further, the damper plate 52A of the wind direction plate 52 located on the left side is below the left side of the cooling chamber 11 and is the cover 4
The cold air passage 39B at the front is opened and closed, and the damper plate 52B opens and closes the cold air passage 39B at the rear of the cover 41. And
The wind direction plate 52 is rotated by the motor, and the damper plate 5 is rotated.
2A closes the cold air passage 39B, and the damper plate 52B
Is configured so that the cold air passage 39B is opened and the damper plate 52A is opened to the cold air passage 39B, and the damper plate 52B is closed to the cold air passage 39B.

On the other hand, on the inner surfaces of the left and right side walls of the upper heat conducting box 21, sensors 56 and 57 as temperature detecting devices for detecting the left and right temperatures in the upper storage chamber 31 are attached, and the lower heat conducting box 22 is attached. On the inner surface of the left and right side walls of the
Sensors 58 and 59 are attached as temperature detecting devices for detecting the left and right temperatures inside. The outputs of the sensors 56 to 59 are connected to a control device (not shown) that controls the operation of the motor. Insulation box 6
The front and rear openings 7 and 8 are, for example, double door type heat insulating doors 44 and 4.
4, 46 and 46 are respectively closed so as to be openable and closable. The low-temperature storage 1 is installed between the kitchen and the passenger seats, and the front opening 7 is on the kitchen side and the rear opening 8 is on the passenger seat side.

Next, the operation of the cold storage 1 having the above construction will be described. Here, the damper plate 51A of the current wind direction plate 51
Is the cold air passage 39A in front of the cover 41 as shown in FIGS.
, The damper plate 51B opens the cool air passage 39A behind the cover 41, the damper plate 52A of the wind direction plate 52 opens the cool air passage 39B in front of the cover 41, and the damper plate 5
2B closes the cold air passage 39B behind the cover 41. When the compressor 36 and the blowers 34, 34 of the cooling device are operated in this state, the cool air cooled by the evaporator 33 is sucked downward by the blowers 34, 34 and opened by the damper plate 52A. 41 is blown downward from the cool air passage 39B in the front. The blown out cool air flows into the cool air passage 39 on the left side of the upper heat conducting box 21 as shown by the arrow in FIG. 1 and flows down there, and thereafter, a part of the cool air passes through the through holes 14A and falls there. Heat conduction box 22
While flowing into the left side cold air passage 39, the rest flows into the cold air passage 39 between the upper and lower heat conducting boxes 21 and 22.

The cold air that has flowed into the cool air passage 39 on the left side of the lower heat conducting box 22 flows into the cool air passage 39 below the lower heat conducting box 22 and then passes through the through holes 23A and 23A. It flows into the cool air passage 39 on the right side of the guide box 22. Lower heat conduction box 2
The cold air that has flowed into the cold air passage 39 on the right side of 2 rises up there and passes through the through hole 14A to the cold air passage 3 on the right side of the upper heat conducting box 21.
Inflow to 9. Then, it merges with the cool air that has passed through the cool air passage 39 between the upper and lower heat conducting boxes 21 and 22, and the upper heat conducting box 2
1 rises in the cool air passage 39 on the right side and flows into the cool air passage 39 above the upper heat conducting box 21.

The cool air that has flowed into the cool air passage 39 above the upper heat conducting box 21 flows from the right side of the upper heat conducting box 21 toward the left rear, and is opened by the damper plate 51B as shown by the arrow in FIG. It flows into the cooling chamber 11 through the cool air passage 39A behind the cover 41, rises in the cooling chamber 11 behind the evaporator 33, and returns to the evaporator 33 from above the evaporator 33. By such a series of forced circulation of cold air, the cold air from the evaporator 33 flows along substantially the entire upper, lower, left and right surfaces of the upper and lower heat conducting boxes 21, 22. Therefore, the upper and lower storage chambers 31,
The inside of 32 is cooled by the upper, lower, left and right wall surfaces of the upper and lower heat conducting boxes 21, 22.

Here, the cold air circulating in the cool air passage 39 has the lowest temperature just after being blown out from the blowers 34, 34 after exchanging heat with the evaporator 33, and the upper and lower heat conducting boxes 21,
The temperature is highest after heat exchange with 22. Therefore, according to the cold air circulation as described above, the temperature of the cool air flowing down the left side of the upper heat conducting box 21 is the lowest and the temperature of the cool air rising the right side is the highest. Therefore, if only the circulation direction of the cool air is considered. , Upper storage chamber 3 corresponding to the left side of the upper heat conducting box 21
1 is cooled strongly and its temperature becomes low, and the cooling effect in the upper storage chamber 31 of the portion corresponding to the right side of the upper heat conducting box 21 is weak and the temperature tends to rise.

Further, since the internal temperature also changes depending on the temperature of articles such as dishes stored in the upper and lower storage chambers 31, 32, the temperature in the upper and lower storage chambers 31, 32 varies due to these various factors. However, the cooling temperature of the article becomes non-uniform depending on the positions in the upper and lower storage chambers 31, 32. Therefore, in the present invention, for example, the left side temperature in the upper and lower storage chambers 31, 32 sensed by the left side sensors 56, 58 has reached the set temperature, and the right side in the upper and lower storage chambers 31, 32 sensed by the right side sensor 57 or 59. If the temperature is higher than the set temperature, the control device causes the motor to operate as shown in FIGS.
Both wind direction plates 51 and 52 are rotated to the positions as shown in FIG. In this state, the damper plate 51A of the wind direction plate 51 opens the cool air passage 39A in front of the cover 41, and the damper plate 51B covers the cover 41.
The rear cool air passage 39A is closed, the damper plate 52A of the wind direction plate 52 closes the cool air passage 39B in front of the cover 41, and the damper plate 52B is the cool air passage 39 behind the cover 41.
Open B.

By the rotation of the wind direction plates 51, 52, the cool air cooled by the evaporator 33 is sucked downward by the blowers 34, 34, and from the cool air passage 39A in front of the cover 41 opened by the damper plate 51A. Upper heat conduction box 2
1 will be blown upward. The blown out cool air flows into the cool air passage 39 on the upper side of the upper heat conducting box 21 as shown by the arrows in FIGS. 5 and 6 and flows rightward there, and the cool air passage on the right side of the upper heat conducting box 21. 39, and then, a part of the cool air passes through the through holes 14A and flows into the cool air passage 39 on the right side of the lower heat conducting box 22 as it is, and the rest is the cool air between the upper and lower heat conducting boxes 21 and 22. It flows into the passage 39.

The cool air that has flowed into the cool air passage 39 on the right side of the lower heat conducting box 22 flows into the cool air passage 39 below the lower heat conducting box 22, and then passes through the through holes 23A and 23A. It flows into the cold air passage 39 on the left side of the guide box 22. Lower heat conduction box 2
The cold air that has flowed into the cold air passage 39 on the left side of 2 rises up there and passes through the through holes 14A to the cold air passage 3 on the left side of the upper heat conducting box 21.
Inflow to 9. Then, it merges with the cool air that has passed through the cool air passage 39 between the upper and lower heat conducting boxes 21 and 22, and the upper heat conducting box 2
1 goes up in the cold air passage 39 on the left side.

The cool air that has risen in the cool air passage 39 on the left side of the upper heat conducting box 21 flows to the left rear side of the upper heat conducting box 21 and is opened by the damper plate 52B as shown by the arrow in FIG. 41 flows into the cooling chamber 11 from the rear cool air passage 39B, rises in the cooling chamber 11 behind the evaporator 33, and returns to the evaporator 33 from above the evaporator 33. In this way, since the circulation direction of the cool air flowing in the cool air passage 39 is reversed by the rotation of the wind direction plates 51, 52, the cool air having a low temperature immediately after exchanging heat with the evaporator 33 is transferred to the upper and lower heat conducting boxes 21,
The right side of 22 is circulated first, so that the right side portion in the upper storage chamber 31 or the lower storage chamber 32, which has a high temperature as described above, can be cooled more strongly. Therefore, the temperature of the right part in the upper and lower storage chambers 31, 32 is lowered, and the temperature in the storage chambers 31, 32 is made uniform.

Here, by reversing the cold air circulation direction,
Left-side sensor 56 or 5 in the upper and lower storage chambers 31, 32
When the temperature sensed by 8 rises and becomes higher than the set temperature, the control device causes the motor to return the wind direction plates 51 and 52 to the state of FIG. 1 again to reverse the circulation direction of the cool air. By repeating the above, the entire insides of the upper and lower storage chambers 31 and 32 are uniformly cooled.

Regarding the control of the wind direction plates 51 and 52,
As described above, when the temperature sensed by either of the left side sensors 56, 58 becomes high, the cool air is first passed through the left side cool air passage 39, and when the temperature sensed by either of the right side sensors 57, 59 becomes high, the cool air is conducted. The circulation direction may be reversed, and the average value of the temperatures sensed by the left-side sensors 56 and 58 and the average value of the temperatures sensed by the right-side sensors 57 and 59 are compared, and the higher one is cooled first. May be controlled so as to circulate.

Further, in the above embodiment, the sensors 56 to 59 are provided.
Although the operation of the wind direction plates 51 and 52 is controlled by the above, the invention is not limited to this, and the operation of rotating the wind direction plates 51 and 52 and reversing the cold air circulation direction at regular intervals is repeated, thereby repeating the upper and lower storage chambers 31. There is no problem even if the insides of 32 are cooled uniformly. And the upper and lower storage chambers 31,
The food cooked in the kitchen is stored in the room 32 through the front opening 7 by opening the door 44. A predetermined number of dishes are temporarily stored in the upper and lower storage rooms 31 and 32, and the waiter opens the door 4 after receiving an order or as the banquet progresses.
6 is opened, and the food is taken out from the opening 8 on the rear surface and provided to the customer. Further, since the taken-out food can be replenished from the opening 7 on the opposite side, the food can be stored / provided / supplemented very smoothly.

At this time, there is no direct inflow of cold air into the upper and lower storage chambers 31 and 32, and since it is indirectly cooled from the upper, lower, left and right wall surfaces as described above, it is housed in the upper and lower storage chambers 31, 32. The dishes are stored cold without drying. Therefore, the dish can be stored in a delicious state without being wrapped in wrap or the like. Further, in the embodiment, the overhanging portion 9 is formed on the top wall 6A of the heat insulating box 6, and the overhanging portion 9 is formed.
Since the cooling chamber 11 in which the evaporator 33 is arranged is configured,
Evaporator 3 without reducing the capacity of upper and lower storage chambers 31, 32
3 and the blower 34 can be provided. In the embodiment, the low temperature storage having the upper and lower storage chambers 31 and 32 has been described, but the present invention is not limited to this, and the present invention is effective even if the low temperature storage has only one chamber.

[0031]

As described above in detail, according to the present invention, the storage chamber is opened in the front-rear direction by opening the door, so that articles can be stored in one side and taken out from the other side. Therefore, provision of food such as cooked dishes and storage in the storage chamber can be performed extremely smoothly. In addition, since the inside of the storage room is indirectly cooled from the top, bottom, left and right sides of the heat conducting box other than the front and rear openings, it is possible to store food such as dishes stored in the storage room at low temperature without drying. become.

In particular, according to the present invention, since the wind direction plate is provided in the cold air passage, the cooling direction by the circulation cold air is reversed in the storage chamber through the heat conducting box by appropriately reversing the circulation direction of the cool air by this wind direction plate. It is possible to apply it uniformly.
As a result, it is possible to prevent the occurrence of temperature unevenness in the storage chamber, to make the temperature uniform, and to satisfactorily cool and store articles such as dishes at any position in the storage chamber.

Further, according to the invention of claim 2, in addition to the above, a plurality of temperature detecting devices are provided in the storage chamber, and the wind direction plate is controlled based on the output of each temperature detecting device. Since the cooled cold air is circulated toward the hot part of the storage chamber, it becomes possible to circulate the cool cool air immediately after heat exchange with the evaporator to the hot part of the storage chamber first. As a result, the occurrence of temperature unevenness in the storage chamber can be eliminated more smoothly.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a low temperature storage unit of the present invention.

FIG. 2 is a vertical side view of the cold storage of the present invention.

FIG. 3 is a partially cutaway plan view of the low temperature storage according to the present invention.

FIG. 4 is a plan sectional view of an upper portion of the low temperature storage unit of the present invention.

FIG. 5 is a vertical sectional front view of the low temperature storage for explaining the operation of the wind direction plate.

FIG. 6 is a plan sectional view of the upper part of the low temperature storage for explaining the operation of the wind direction plate.

[Explanation of symbols]

 1 Low Temperature Storage Box 6 Insulation Box 7 Opening 8 Opening 21 Upper Heat Good Conducting Box 22 Lower Heat Good Conducting Box 31 Upper Storage Room 32 Lower Storage Room 33 Evaporator 34 Blower 39 Cold Air Passage 44 Door 46 Door 51 Wind Facing Board 52 Wind Facing Board 56 Sensor 57 sensor 58 sensor 59 sensor

Claims (2)

[Claims] 1. A heat-insulating box body having openings in front and rear surfaces, and doors which respectively open and close the front and rear openings of the heat-insulating box body,
A heat conducting box having openings in the front and rear surfaces and arranged at intervals in the heat insulating box body, and having the inside as a storage chamber, and the heat conducting box at the upper, lower, left and right sides of the heat conducting box and the heat insulation. A cool air passage formed between boxes, and an evaporator and a blower of a cooling device arranged in the cool air passage, wherein the cool air cooled by the evaporator is passed by the blower to the cool air passage. A low-temperature storehouse characterized by indirectly cooling the inside of the storage chamber by forcibly circulating the air therein, and providing a wind vane for inverting the circulation direction of the cool air in the cold air passage. 2. A plurality of temperature detecting devices are provided in the storage chamber, and by controlling the wind direction plate based on the output of each temperature detecting device, the cool air cooled by the evaporator has a high temperature inside the storage chamber. The cold storage according to claim 1, wherein the cold storage is circulated toward the part.