JPH09243228A - Cooling storage chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent or restrict drying of a contained article keeping cooling capability of a storage chamber. SOLUTION: This cooling storage chamber is constituted so that cold air cooled by a cooler 17 is circulated through a storage chamber 9 with a fan 18, and that it includes a closed duct 14 closed at its final end and a cold air discharge hole 21 allowing the closed duct 14 to communicate with the storage chamber 9. The cold air heat-exchanged with the cooler 17 is supplied into the closed duct 14 with the aid of the fan 18 whereby static pressure in the closed duct 14 is raised, and a cold air discharge area of a higher static pressure part is reduced while that of a lower static pressure part is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted low temperature showcase, a cold storage such as a commercial or domestic refrigerator.

[0002]

2. Description of the Related Art Conventionally, the storage room of a ceiling-mounted low-temperature showcase as disclosed in, for example, Japanese Unexamined Patent Publication No. 6-88463 (E05D7 / 10) has been cooled by a system as shown in FIG. That is, in the figure, reference numeral 102 denotes a horizontally elongated heat-insulating box body that constitutes the main body of the conventional showcase 101, and has a storage chamber 103 that is opened in the front and rear surfaces inside, and the front and rear openings of the storage chamber 103 are doors (not shown). It has been blocked.

A cooler 104 is provided on one side of the top surface of the storage room 103.
Is attached to the left side of the suction fan 10
6 is attached. A duct member 107 having a hollow inside is attached to the top surface of the storage chamber 103 on the right side of the cooler 104, and the duct 1 is installed in the duct member 107.
08 is configured. The left and right ends of the duct member 107 (duct 108) are open, and a plurality of cool air discharge ports 109, ... Are bored in the front and rear surfaces between them.

On the other hand, units such as a compressor and a condenser (not shown) are mounted on the heat insulating box 102 to form a known refrigeration cycle with the cooler 104. When the compressor and blower 106 are operated, the cooler 104 exerts a cooling action and the cooler 10
The cool air that has exchanged heat with the No. 4 and is cooled is discharged to the right by the blower 106.

A part of the discharged cool air is stored in the storage chamber 1 as it is.
03, but the rest flows into the duct 108 from the left end of the duct member 107, and the cool air discharge port 10 in the middle
While being discharged little by little from 9 ... to the upper part of the storage chamber 103, it is finally discharged from the right end to the upper right part of the storage chamber 103. The cool air thus discharged into the storage chamber 103 was sucked by the blower 106 and blown again toward the cooler 104 (indicated by an arrow in the figure).

[0006]

However, in such a conventional cooling system, the cool air that has exchanged heat with the cooler 104 is directly discharged to the storage chamber 103, and the blower 10 is also used directly.
Since it is sucked into 6, the flow rate of the discharged cool air and the flow rate of the sucked cool air are increased, and thereby the wind speed of the circulating cool air in the storage chamber 103 is relatively increased.

Therefore, although the cooling capacity (or the cooling rate) of the storage chamber 103 is increased, the amount of water taken from the surface of the stored articles (food such as salad) is increased, and the problem of drying and deterioration is remarkable. Occurs.

Therefore, as a method for preventing such drying, for example, Japanese Patent Publication No. 7-18630 (F25D11).
/ 00), indirect cooling is possible. FIG.
The structure of the indirect cooling type showcase 111 concerning this is shown.
In the figure, the same symbols as those in FIG. 9 are the same.

In this case, a heat-conducting cooling box (opened on the front and rear surfaces) 112 is provided inside the heat insulating box body 102 with a space therebetween.
Is installed in the cooling box 112.
03 is provided, and between the cooling box 112 and the heat insulating box body 102 is a series of vertically and horizontally sealed ducts 113. Then, the cooler 104 and the blower 10 are provided in the duct 113.
6 is provided. Others are the same as the case of FIG.

When the blower 106 is operated with such a structure, the cold air that has exchanged heat with the cooler 104 is forcedly circulated in the duct 113 (indicated by the arrow in the figure), and the cooling box 112 is cooled by such cold air circulation. The inside of the storage chamber 103 is indirectly cooled from the wall surface of the cooling box 112 which has become low in temperature.

In such an indirect cooling system, the storage chamber 10
Since the cool air is not directly discharged into the inside of the container 3, evaporation of water from the article is suppressed, and conversely, the moisture from the article keeps the storage chamber at a high humidity. However, since it is necessary to form an airtight duct, there is a problem that the structure becomes complicated and the cost increases, and the cooling capacity is inevitably insufficient when the door is opened and closed many times.

The present invention has been made to solve the above-mentioned conventional technical problems, and provides a cooling storage cabinet capable of preventing or suppressing the drying of stored articles while maintaining the cooling capacity of the storage chamber. The purpose is to provide.

[0013]

SUMMARY OF THE INVENTION The cooling storage of the present invention comprises:
Cooling air cooled by a cooler is circulated in a storage chamber by a blower, and a closed duct having a closed end and a cold air discharge port communicating the closed duct with the storage chamber are provided. The static pressure in the closed duct is increased by supplying the cool air that has exchanged heat with the device into the closed duct by a blower, and the cool air discharge area in the high static pressure area is reduced, and the cool air in the low static pressure area is discharged. It is a large area.

According to the present invention, a closed duct having a closed end and a cold air discharge port communicating with the closed duct and the storage chamber are formed, and cool air that has exchanged heat with the cooler is supplied into the closed duct by a blower. By increasing the static pressure in the closed duct, and reducing the cold air discharge area of the high static pressure portion, and widening the cool air discharge area of the low static pressure portion, from the cold air discharge port to the storage chamber. The amount of cold air discharged is made uniform. Further, although the flow rate of the cool air discharged from the cool air discharge port of the low static pressure becomes slow and the flow rate of the cool air discharged from the cool air discharge port of the high static pressure becomes fast, the cool air discharge area of the part is Being reduced, the cool air diffuses quickly in the storage chamber, slowing the flow rate.

As described above, the amount of cool air discharged from the cool air discharge port is made uniform and the flow velocity is slowed, so that the storage chamber is uniformly cooled and the evaporation of water from the stored articles is suppressed. become. Therefore, according to the present invention, the articles stored in the storage chamber can be satisfactorily cooled and stored while preventing deterioration due to drying.

According to a second aspect of the present invention, there is provided a cooling storage cabinet in which a cool air discharge port is formed sparsely in a portion having a high static pressure in the closed duct and a cool air discharge port is densely formed in a portion having a low static pressure. is there.

According to the second aspect of the present invention, the cool air discharge port is formed sparsely in the high static pressure portion in the above-mentioned closed duct, and the cool air discharge port is densely formed in the low static pressure portion. The discharge area can be adjusted with a simple structure, and the production cost can be reduced.

According to a third aspect of the present invention, there is provided a cooling storage cabinet in which the sealed duct in each of the above inventions is constituted by a plurality of mutually connected duct members, and the amount of cool air flowing through the sealed duct between the adjacent duct members. The dam portion is formed so as to be restricted.

According to the invention of claim 3, in each of the above inventions, the closed duct is constituted by a plurality of mutually connected duct members, and the amount of cold air flowing through the closed duct between adjacent duct members is limited. Since the dam portion is formed, the static pressure in the duct member near the cooler can be increased and the static pressure in the closed duct can be made uniform. Therefore, it becomes possible to realize further uniformization of the amount of cold air from the cold air discharge port and the flow velocity.

According to a fourth aspect of the present invention, there is provided a cooling storage cabinet, wherein the closed duct in each of the above inventions comprises a discharge side duct provided with a cool air discharge port and a suction side duct provided with a cool air suction port, and a storage chamber. The bottom bed is provided in a state of floating from the bottom surface of the, and the cold air suction port is formed below the bottom bed.

According to the invention of claim 4, in each of the above inventions, the closed duct is composed of a discharge side duct provided with a cool air discharge port and a suction side duct provided with a cold air suction port, The bottom floor is provided in a state of floating from the bottom,
Since the cold air suction port is formed below the bottom floor, the lower side of the bottom floor can be used as a cold air suction space. Therefore, it is possible to reduce the flow rate of the suctioned cool air and further promote the reduction and uniformization of the flow rate of the cool air in the storage chamber.

According to a fifth aspect of the present invention, there is provided a cooling storage cabinet in which the suction duct is extended over the bottom surface of the storage chamber.

According to the invention of claim 5, in addition to the above, since the suction side duct is extended over the bottom surface of the storage chamber, the cold air suction area is wide and diffused, and the adverse effect of the flow rate of the sucked cool air is further increased. It will be possible to suppress.

According to the sixth aspect of the present invention, in the cooling storage cabinet, the bottom duct member constituting the suction side duct on the bottom of the storage chamber is detachable.

According to the invention of claim 6, since the bottom duct member constituting the suction side duct at the bottom of the storage chamber is made detachable in the above, workability in cleaning dust and juice spilled into the storage chamber. Will be improved.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a front view of a low temperature showcase 1 as an embodiment of a cold storage of the present invention, FIG. 2 is a plan view of the low temperature showcase 1, FIG. 3 is a vertical side view of the low temperature showcase 1, and FIG. 4 is a door 2. 3 is a front view of the low temperature showcase 1 except for FIG. 3, and FIG. 5 is a vertical sectional front view of the heat insulating box body 4 of the low temperature showcase 1.

The low-temperature showcase 1 of the embodiment is a so-called ceiling-mounted low-temperature showcase that is attached to the ceiling above the counter of a restaurant. In each drawing, 4 is a horizontally long heat-insulating box constituting the main body of the low-temperature showcase 1. The body is formed by foaming and filling a heat insulating material 8 between an outer box 6 and an inner box 7 made of steel plates having front and rear surfaces opened. A storage chamber 9 is formed in the inner box 7 of the heat-insulating box body 4, the front and rear surfaces of which are opened. The front and rear openings of the storage chamber 9 are glass doors 2, 2, 3,
3 are closed so that they can be opened and closed.

A ceiling duct member 11, a left duct member 12, and a right duct member 13 as shown in FIGS. 6 and 7 are attached to the inner surface of the storage chamber 9 (inside the inner box 7). The duct members 11, 12 and 13 are connected to each other in an airtight manner, so that a series of ducts 14 extending over the top surface and the left and right surfaces of the storage chamber 9 are formed in each duct member 11, 12, 13. Has been done.

The ceiling duct member 11 has a substantially U-shaped cross section, and its left and right ends are open. This top surface duct member 1
A dew receiving plate 16 having a substantially U-shaped cross section is attached to the left side of the inside of FIG. 1, a cooler 17 is disposed on the dew receiving plate 16, and fans 18, 18 are attached to the left end of the dew receiving plate 16. All of them are located in the duct 14 above the storage chamber 9. A bottom surface 16A of the dew receiving plate 16 is inclined low toward the blower 18, and its left end (below the blower 18) and the ceiling duct member 1 are provided.
A seal member 19 is attached between the two, and the right side of the seal member 19 is gradually separated upward from the ceiling duct member 11.

As a result, the duct 14 is separated left and right from the position where the blower 18 exists, and the right side is the discharge side duct 14D and the left side is the suction side duct 14S. Also,
A plurality of cold air discharge ports 21 formed of through holes are formed in the lower portion of the ceiling duct member 11 located on the discharge side duct 14D side. In this case, the number of cool air discharge ports 21 is equal to that of the blower 1.
8 is sparser on the right side of the fan, and closer to the blower 18 on the left side.

The left-side duct member 12 also has a substantially U-shaped cross section, the upper and lower ends of which are open, and a U-shaped notch 12A is formed at the upper end. This notch 12A is the left end of the ceiling duct member 11. It matches the opening. The lower end of the left duct member 12 floats from the bottom surface of the storage chamber 9, and the lower end has a cold air suction port 22 formed of an opening and a plurality of cold air suction ports 23 ... Is formed across.

The right duct member 13 also has a substantially U-shaped cross section, and its lower end is closed by the bottom surface of the storage chamber 9. Further, a U-shaped notch 13A corresponding to the right end opening of the top surface duct member 11 is formed at the upper end, and this notch 13A is formed smaller than the right end opening of the top surface duct member 11, whereby the duct A weir portion 24 that narrows the air passage is formed between the members 11 and 13. Further, a plurality of cold air discharge ports 21 formed of through holes are formed in the front and rear of the right surface duct member 13. In this case, the cool air discharge port 2 is formed.
The number of 1 becomes sparser toward the lower side which is separated from the weir portion 24, and
The upper side is close to 4 and is formed densely.

Shelf struts 26 are attached to the inner surfaces of the duct members 12 and 13 at the top and bottom, and a net shelf 27 is erected on the shelf struts 26 and is located in the middle of the storage chamber 9. On the bottom surface of the storage chamber 9, a net-shelf-shaped bottom 28 having a predetermined height is placed, and the lower end cool air suction port 22 of the left side duct member 12 is below the bottom 28. It is open. Reference numeral 29 is a fluorescent lamp mounted above the inside of the opening on the front side of the storage chamber 9.

On the upper surface of the heat-insulating box body 6, openable and closable front and rear grills 31, 31 and left and right side panels 32.
A machine room 33 surrounded by is constructed. And
A compressor 34, a condenser 36, a condenser blower 37, and a transfer box 38 are housed in the machine room 33, and are mounted on the upper surface of the heat insulating box body 6. The compressor 34, the condenser 3
6. The decompression device and the cooler 17, not shown, constitute a known refrigeration cycle. Then, the upper ends of the grills 31, 31 and the panels 32, 32 are fixed to the ceiling surface, and the low temperature showcase 1 is suspended and installed.

When the compressor 34, the condenser blower 37, and the blowers 18, 18 are operated in the above-mentioned configuration, the compressor 3
The high-temperature and high-pressure gas refrigerant discharged from No. 4 is air-cooled and condensed by the condenser 36 and decompressed by the decompression device, and then the cooler 17
Flows into. The refrigerant that has flowed into the cooler 17 evaporates and exerts a cooling effect, and the cool air that has cooled by exchanging heat with the cooler 17 is discharged to the discharge duct 14D on the right side by the blowers 18 and 18. .

Since the lower end of the right-side duct member 13 which is the terminal end of the discharge side duct 14D is closed, the static pressure in the discharge side duct 14D rises when the cool air is strongly fed as described above. This static pressure becomes highest at the lower end of the closed right-side duct member 13, but the weir portion 24 also blocks the air passage and limits the amount of cool air, so that the inside of the top-face duct member 11 (right side). Will be higher as well.

The discharge side duct 1 whose static pressure has risen in this way
Cold air is discharged toward the storage chamber 9 from the cold air discharge ports 21 ... At this time,
In the lower part of the right duct member 13 where the static pressure becomes high and the right part of the ceiling duct member 11, the cool air discharge ports 21 are sparsely formed to reduce the overall cool air discharge area, and the right face where the static pressure becomes relatively low. In the upper part of the duct member 13 and the left part of the top surface duct member 11 (below the dew receiving plate 16), the cool air discharge ports 21 are densely formed and the cool air discharge area as a whole is widened, so that each cool air discharge is performed. The amount of cold air discharged into the storage chamber 9 from the outlets 21 ... Is made uniform.

In addition, the cold air discharge port 21 of the portion where the static pressure is low
The flow rate of the cool air discharged from the cooling air becomes slower and the flow rate of the cool air discharged from the cool air discharging port 21 at the portion where the static pressure is high becomes faster, but the cold air discharging area as a whole of this high portion is reduced. Therefore, the cold air immediately diffuses in the storage chamber 9 and the flow velocity becomes slow.

Further, since the ceiling duct member 11 becomes relatively large in order to attach the dew receiving plate 16, the rise in static pressure becomes low as a whole, which also slows the flow rate of the discharged cool air. Further, the dew receiving plate 16 is arranged so that the cooler 1
7, the discharge side duct 14D is formed so as to wrap around, and the cold air discharge ports 21 ... Are also formed in that portion, so that the arrangement of the cool air discharge ports 21 is dispersed in a wide range and The number also increases, and as a result, the flow rate of cold air discharged from one cold air discharge port 21 decreases.

As a result of the above, the amount of cold air discharged from each cold air discharge port 21 ... Is made uniform and the flow velocity is also slowed down, so that the inside of the storage chamber 9 is uniformly cooled, and the stored articles such as salad are Evaporation of the water content is also suppressed. Therefore, the articles stored in the storage chamber 9 can be satisfactorily cooled and stored while preventing deterioration due to drying.

The cold air discharged into the storage chamber 9 circulates inside, and then, as shown by the arrow in FIG. 5, directly from the cool air suction port 23 of the left duct member 12 or after passing through the bottom 28, The cold air suction port 22 at the lower end sucks the suction side duct 14S. As described above, since the cool air is sucked from a wide range of the left duct member 12 and the lower portion of the bottom floor 28 is used as the cool air suction space, the flow rate of the sucked cool air is reduced and the flow rate of the cool air in the storage chamber 9 is reduced. And it becomes possible to further promote the homogenization.

Next, FIG. 8 shows another embodiment of the present invention. The same reference numerals as those in FIGS. 1 to 7 are used in the drawings. In this case, a bottom surface duct member 41 is removably placed on the bottom surface of the storage chamber 9 inside the bottom cover 28. The bottom surface duct member 41 also has a substantially U-shaped cross section, the left and right ends thereof are open, and the left end communicates with the cool air suction port 22 at the lower end of the left surface duct member 12. Further, a plurality of cold air suction ports 23, ... Are provided in the front and rear thereof, whereby the suction side duct 14S is extended to the bottom surface of the storage chamber 9.

As a result, the cold air suction ports 22, 23, ...
Since the cold air suction area as a whole is wide and has been diffused, it is possible to further suppress the adverse effect due to the flow rate of the sucked cool air. Further, since the bottom surface duct member 41 is detachable, workability in cleaning dust and juice spilled into the storage chamber 9 is also improved.

Although the present invention is applied to the ceiling-mounted low-temperature showcase in the embodiments, the present invention is not limited to this, and the present invention is also effective to a general stationary showcase or refrigerator.

[0045]

As described above in detail, according to the present invention, a closed duct whose end is closed and a cold air discharge port which communicates the closed duct with the storage chamber are formed to cool the cool air exchanged with the cooler. By increasing the static pressure in the closed duct by supplying it into the closed duct by a blower, and reducing the cool air discharge area of the high static pressure portion, widened the cool air discharge area of the low static pressure portion, The amount of cold air discharged from the cold air outlet to the storage chamber is made uniform. Further, although the flow rate of the cool air discharged from the cool air discharge port of the low static pressure becomes slow and the flow rate of the cool air discharged from the cool air discharge port of the high static pressure becomes fast, the cool air discharge area of the part is Since it has been reduced,
Cold air diffuses quickly in the storage chamber, resulting in a slow flow rate.

As described above, the amount of cool air discharged from the cool air discharge port is made uniform and the flow velocity is slowed, so that the inside of the storage chamber is uniformly cooled and the evaporation of water from the stored articles is suppressed. become. Therefore, according to the present invention, the articles stored in the storage chamber can be satisfactorily cooled and stored while preventing deterioration due to drying.

According to the second aspect of the present invention, the cold air discharge port is formed sparsely in the portion with high static pressure in the above-mentioned closed duct, and the cool air discharge port is formed densely in the portion with low static pressure. The discharge area can be adjusted with a simple structure, and the production cost can be reduced.

According to the third aspect of the present invention, in each of the above inventions, the closed duct is constituted by a plurality of mutually connected duct members, and the amount of cold air flowing through the closed duct between adjacent duct members is limited. Since the dam portion is formed, the static pressure in the duct member near the cooler can be increased and the static pressure in the closed duct can be made uniform. Therefore, it becomes possible to realize further uniformization of the amount of cold air from the cold air discharge port and the flow velocity.

According to the invention of claim 4, in each of the above inventions, the closed duct is composed of a discharge side duct provided with a cool air discharge port and a suction side duct provided with a cool air suction port, The bottom floor is provided in a state of floating from the bottom,
Since the cold air suction port is formed below the bottom floor, the lower side of the bottom floor can be used as a cold air suction space. Therefore, it is possible to reduce the flow rate of the suctioned cool air and further promote the reduction and uniformization of the flow rate of the cool air in the storage chamber.

According to the invention of claim 5, in addition to the above, since the suction side duct is extended over the bottom surface of the storage chamber, the cold air suction area is wide and diffused, and the adverse effect due to the flow rate of the sucked cool air is further increased. It will be possible to suppress.

According to the invention of claim 6, the bottom duct member constituting the suction side duct on the bottom of the storage chamber is made detachable in the above, so workability in cleaning dust and juice spilled into the storage chamber. Will be improved.

[Brief description of drawings]

FIG. 1 is a front view of a low temperature showcase as an embodiment of a cooling storage according to the present invention.

FIG. 2 is a plan view of a low temperature showcase.

FIG. 3 is a vertical sectional side view of a low-temperature showcase.

FIG. 4 is a front view of the low temperature showcase excluding doors.

FIG. 5 is a vertical cross-sectional front view of a heat insulating box of a low temperature showcase.

FIG. 6 is a perspective view of a top surface duct member, a left surface duct member, and a right surface duct member in a coupled state.

FIG. 7 is an exploded perspective view of a top surface duct member, a left surface duct member, and a right surface duct member.

FIG. 8 is a vertical sectional front view of a heat insulation box body showing another embodiment of the present invention.

FIG. 9 is a vertical cross-sectional front view of a heat insulating box of a conventional showcase.

FIG. 10 is a vertical cross-sectional front view of another conventional heat insulating box body of the showcase.

[Explanation of symbols]

 1 Low Temperature Showcase 4 Insulation Box Body 9 Storage Room 11 Top Duct Member 12 Left Side Duct Member 13 Right Side Duct Member 14 Closed Duct 14D Discharge Side Duct 14S Suction Side Duct 17 Cooler 18 Blower 21 Cold Air Discharge Port 22, 23 Cold Air Suction Port 24 Weir 28 Bottom 41 Bottom duct member

Claims (6)

[Claims] 1. A cooling storage cabinet in which cool air cooled by a cooler is circulated in a storage chamber by a blower, and a closed duct having a closed end, and a cold air discharge port communicating between the closed duct and the storage chamber. And increasing the static pressure in the closed duct by supplying the cool air that has exchanged heat with the cooler into the closed duct by the blower, and reduces the cold air discharge area of the high static pressure portion, Cooling storage characterized by widening the cool air discharge area of the part with low static pressure. 2. The cooling storage according to claim 1, wherein the cool air discharge port is formed sparsely in a portion having a high static pressure in the closed duct, and the cool air discharge port is densely formed in a portion having a low static pressure. 3. The closed duct is composed of a plurality of duct members connected to each other, and a weir portion for limiting the amount of cold air flowing in the closed duct is formed between adjacent duct members. The cooling storage according to claim 1 or 2. 4. The closed duct is composed of a discharge side duct provided with a cool air discharge port and a suction side duct provided with a cool air suction port, and a bottom floor is provided in a state of floating above the bottom surface of the storage chamber, The cold storage according to claim 1, 2 or 3, wherein the cold air suction port is formed below the bottom floor. 5. The cooling storage cabinet according to claim 4, wherein the suction side duct is extended over the bottom surface of the storage chamber. 6. A cooling storage cabinet according to claim 5, wherein a bottom surface duct member constituting a suction side duct on the bottom surface of the storage chamber is detachable.