WO2020045676A1

WO2020045676A1 - Cooling device

Info

Publication number: WO2020045676A1
Application number: PCT/JP2019/034316
Authority: WO
Inventors: 昭彦長岡
Original assignee: 株式会社ナガオカ
Priority date: 2018-09-02
Filing date: 2019-08-31
Publication date: 2020-03-05
Also published as: JP2020038013A; JP6561427B1

Abstract

Provided is a cooling device in which the amount of frost adhering to a cooling coil is reduced. This cooling device 10 has formed therein a first chamber 20a and a second chamber 20b into which an article 30 to be cooled is transported, and comprises a partition 16 that connects the first chamber 20a and the second chamber 20b and has an opening provided therein, a cooling coil 12 disposed in the opening, and a plurality of fans 14a, 14b that are provided on the side of the cooling coil 12 opposite the second chamber 20b, the partition 16 being provided so that substantially no gap is formed passing from the second chamber 20b to the first chamber 20a.

Description

Cooling system

The present invention relates to a cooling device.

Patent Document 1 describes a cooling device that cools an object to be cooled by circulating cool air with a cooling fan. This cooling device is a cooling device provided with a cooler provided at least on a side wall side of a room formed by a heat insulating box, a cooling room in front of the cooler, and a fan for flowing air in the cooling room. Then, the cooler and the cooling chamber are partitioned by a partition plate so that cool air is stored in the cooler, and the fan is arranged on the cooler side of the partition plate, and is provided on a partition plate in front of the fan. Has an opening, the size of the opening is larger than the diameter of the fan, and when the fan is viewed in the rotation axis direction of the fan, the fan is arranged in the opening, and there is an open space outside the fan, By the rotation of the fan, a discharge flow of cool air blown out from the cooler through the opening to the cooling chamber and a suction flow of cool air sucked from the cooling chamber through the opening to the cooler are generated, and the discharge flow and the suction flow are generated. Clash with each other and reduce the flow rate of cold air So as to suppress the frosting of the cooler, it is characterized by replacing the accumulated in cold air cooling chamber and the cooler cold air.

Patent Document 2 discloses a cooling device that has a simpler structure than a conventional cold air forced circulation system, can exhibit the same cooling performance, and can reduce the amount of frost on a cooler. I have. This cooling device includes a box formed of a heat insulating member, a cooler that cools air by heat exchange, a cooler room in which the cooler is housed inside the box, and an object to be cooled is housed. A partition plate partitioned into two compartments with a storage compartment and having an opening formed to connect these two compartments, and disposed in the cooler compartment, and the air cooled by the cooler is introduced into the storage compartment through the opening. And a fan to send in. The opening is larger than the diameter of the fan and, when viewed from the direction of the rotation axis of the fan, is arranged so that the opening surrounds the outer periphery of the fan with a gap therebetween. Is defined by 1.8 × π (R / 2) ² ≦ S ≦ 2.5 × π (R / 2) ² , and the distance between the boundary surface on the storage side of the opening and the frontmost portion of the fan is , 0 or more and 0.2R or less.

International Publication No. 2004/113807 International Publication No. 2005/124249

Here, in general, there is a demand for a cooling device in which the amount of frost adhering to the cooling coil is reduced.
An object of the present invention is to provide a cooling device in which the amount of frost adhering to a cooling coil is reduced.

The present invention forms a first chamber and a second chamber into which an object to be cooled is introduced, and a partition provided with an opening connecting the first chamber and the second chamber; A cooling coil disposed in the opening; and a plurality of first fans provided on a side opposite to the second chamber with the cooling coil interposed therebetween, wherein the partition is separated from the second chamber. It is provided that a gap leading to the first chamber does not substantially occur.

According to the present invention, it is possible to provide a cooling device in which the amount of frost adhering to the cooling coil is reduced.

FIG. 2 is an explanatory diagram of the cooling device according to the first embodiment of the present invention. It is a top view showing arrangement of a fan and a cooling coil with which the same cooling device is provided. It is an explanatory view of a cooling device according to a second embodiment of the present invention.

Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. In the drawings, portions not related to the description may be omitted.

[First Embodiment]
As shown in FIG. 1, the cooling device 10 according to the first embodiment of the present invention includes a partition plate 16, a cooling coil 12,

fans

14a and 14b, and a fan 15, and can cool the object 30 to be cooled. The object to be cooled 30 is, for example, food.

The partition plate (an example of a partition) 16 is a member for forming an upper first chamber 20 a and a lower second chamber 20 b inside the cooling device 10. An opening in which the cooling coil 12 is disposed is provided at the center of the partition plate 16, and the opening connects the first chamber 20a and the second chamber 20b. The partition plate 16 has a gap from the second chamber 20b to the first chamber 20a so that an airflow that does not flow between the first chamber 20a and the second chamber 20b except for the opening is generated. The partition plate 16 can be controlled so that the airflow returning from the second chamber 20b to the first chamber 20a passes through the cooling coil 12 because the partition plate 16 is provided inside the inner wall so that there is no air flow. Here, "to prevent a gap from occurring" means that an error in design or manufacturing is allowed, and that "a gap does not substantially occur".
Therefore, the inside of the cooling device 10 is divided into a first chamber 20a and a second chamber 20b into which the object 30 is carried, with the partition plate 16 and the cooling coil 12 interposed therebetween.
The partition plate 16 does not need to be formed by one plate, and may be formed by a plurality of members.

The first chamber 20a is provided with a first door 22a for maintenance of the cooling coil 12 and the

fans

14a and 14b.
The second chamber 20b is provided with a second door 22b for carrying in and out the object 30 to be cooled.

(4) The cooling coil 12 is disposed in an opening provided in the partition plate 16 so as to protrude below the partition plate 16, and can cool surrounding air. The area of the cooling coil 12 in plan view is set to be larger than the area of all the

fans

14a and 14b.

The

fans

14a, 14b (an example of a first fan) are provided on the opposite sides of the cooling coil 12 from the second chamber 20b, and are located at a predetermined distance H1 from the surface of the cooling coil 12. Are located in The

fans

14a and 14b can send the air cooled by the cooling coil 12 toward the lower part of the second chamber 20b by blowing the cooling coil 12 downward.
The

fans

14a and 14b are arranged with an interval D1 therebetween.
Note that the number of fans is not limited to two.

The fan 15 (an example of a second fan) is arranged so that the direction of air flow is in the direction of the object 30 to be cooled. When the fan 15 blows air to the object to be cooled 30, the time until the object to be cooled 30 freezes is reduced.

Next, the operation of the cooling device 10 will be described.
In the cooling device 10, when the object 30 to be cooled is carried in from the second door 22b, the cool air is sent to the second chamber 20b by the

fans

14a and 14b.
The cool air sent to the second chamber 20b returns to the first chamber 20a through the cooling coil 12 again. At this time, some of the cool air returns to the first chamber 20a through the gap between the

fans

14a and 14b (see the portion A shown in FIG. 2), as indicated by the arrow in FIG.
The cool air returned to the first chamber 20a is cooled again by the

fans

14a and 14b and the cooling coil 12, and is sent to the second chamber 20b.
The object to be cooled 30 is cooled in such an airflow, and is frozen while drying is suppressed.

The inventor conducted a test on such a cooling device 10 to clarify its performance.
The cooling device according to the comparative example is a cooling device obtained by removing the partition plate 16 from the cooling device 10. That is, the only difference between the cooling device 10 according to the present embodiment and the cooling device of the comparative example is the presence or absence of the partition plate 16.
In the cooling device without the partition plate 16 (comparative example), the cool air sent to the second chamber 20b by the

fans

14a and 14b mainly passes through the place where the partition plate 16 was located and wraps around the cooling coil 12. Thus, the process returns to the first chamber 20a.

(1) Amount of adhering frost In order to clarify that frost hardly adheres to the cooling coil 12 of the cooling device 10, the amount of water after performing a cooling operation at a refrigerator temperature of −25 ° C. was measured.
As a result of the measurement, the cooling device of the comparative example weighed 85 g, and the cooling device 10 weighed 21 g. That is, in the cooling device 10, the amount of frost adhered was reduced to about 1/4.

(2) Recovery characteristics of the internal temperature In order to clarify that the internal temperature of the cooling device 10 is quickly recovered, the cooling operation is performed to the internal temperature of −25 ° C., and the second door 22b is opened to open the internal temperature. To 0 ° C. Thereafter, the time from when the second door 22b was closed to when the internal temperature reached −25 ° C. was measured.
As a result of the measurement, the cooling device of the comparative example was 30 minutes, and the cooling device 10 was 15 minutes. That is, in the cooling device 10, the internal temperature returned twice as fast.

(3) Drying Characteristics of the Cooled Object 30 In order to clarify that the cooled object 30 is hardly dried by the cooling operation of the cooling device 10, the degree of drying of the cooled object 30 after the cooling operation was measured. The degree of drying was evaluated based on the ratio of the decrease in the weight of the object 30 before and after cooling.
As a result of the measurement, the cooling device of the comparative example had a weight reduction ratio of 12% and the cooling device 10 had a weight reduction ratio of 2.5%. That is, in the cooling device 10, the degree of drying was reduced to about 1/5, and drying was suppressed.

Thus, according to the cooling device 10 according to the present embodiment, frost is suppressed from adhering to the cooling coil 12, the recovery characteristic of the temperature in the refrigerator is excellent, and the drying of the cooled object 30 is suppressed.

[Second embodiment]
Next, a cooling device 50 according to a second embodiment of the present invention will be described.
The cooling device 50 is a so-called tunnel type freezer. As shown in FIG. 3, the cooling device 50 includes a partition plate 62, a cooling coil 52,

fans

54a and 54b,

fans

55a and 55b,

fans

56a and 56b, and a conveyor 58, and can freeze the cooled object 80. The object to be cooled 80 is, for example, food.

The partition plate (an example of a partition) 62 is a member for forming an upper first chamber 70 a and a lower second chamber 70 b inside the cooling device 50. An opening in which the cooling coil 52 is disposed is provided at the center of the partition plate 62, and the opening connects the first chamber 70a and the second chamber 70b. In the partition plate 62, a gap is formed from the second chamber 70b to the first chamber 70a so that an airflow that does not flow between the first chamber 70a and the second chamber 70b except for the opening is generated. The partition plate 62 can be controlled so that the airflow returning from the second chamber 70 b to the first chamber 70 a passes through the cooling coil 52 because the partition plate 62 is provided inside the inner wall surface so as not to exist. Here, "to prevent a gap from occurring" means that an error in design or manufacturing is allowed, and that "a gap does not substantially occur".
Therefore, the interior of the cooling device 50 is divided into a first chamber 70a and a second chamber 70b in which the object to be cooled 80 is loaded on the conveyor 58 with the partition plate 62 and the cooling coil 52 interposed therebetween. .
The partition plate 62 does not need to be formed by one plate, and may be formed by a plurality of members.

(4) The cooling coil 52 is disposed in an opening provided in the partition plate 62 so as to protrude below the partition plate 62, and can cool surrounding air. The area of the cooling coil 52 in plan view is set to be larger than the area of all the

fans

54a and 54b.

The

fans

54a and 54b (an example of a first fan) are provided on the side opposite to the second chamber 70b with the cooling coil 52 interposed therebetween, and are disposed at positions away from the upper surface of the cooling coil 52 by a distance H2. I have. The

fans

54a and 54b can send the air cooled by the cooling coil 52 downward to the second chamber 70b by blowing the cooling coil 52 downward.
The

fans

54a and 54b are arranged with an interval D2 therebetween.
Note that the number of fans is not limited to two.

The

fans

55a and 55b (an example of a second fan) are arranged at intervals along the transport path of the article 80 to be conveyed, and are set so that the air blowing direction is a direction intersecting the transport path of the article 80 to be cooled. Have been. The

fan

55a, 55b sends air to the object to be cooled 80, so that the time until the object to be cooled 80 freezes is reduced.

The

fans

56a and 56b are fans for suppressing the leakage of cool air in the refrigerator, and are provided on the entrance side and the exit side of the transport path of the object to be cooled 80, respectively.
The conveyor 58 can convey the object to be cooled 80 from the inlet of the cooling device 50 to the inside thereof and toward the outlet.

Next, the operation of the cooling device 50 will be described.
In the cooling device 50, the cool air is sent to the second chamber 70b by the

fans

54a and 54b.
The cool air sent to the second chamber 70b returns to the first chamber 70a through the cooling coil 52 again. At that time, a part of the cool air returns to the first chamber 70a through the gap between the fan 54a and the fan 54b as shown by the arrow in FIG.
The cool air returned to the first chamber 70a is cooled again by the

fans

54a and 54b and the cooling coil 52, and is sent to the second chamber 70b.
The object to be cooled 80 moves on the conveyor 58 from the entrance in such an airflow, is cooled, and is frozen while drying is suppressed.

As described above, according to the cooling device 50 according to the present embodiment, since a tunnel-type freezer is configured, adhesion of frost to the cooling coil 52 is suppressed and drying of the object to be cooled 80 is suppressed. Thus, the object to be cooled 80 is efficiently frozen in large quantities.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and all changes in conditions that do not depart from the gist are within the scope of the present invention.
In the above-described first and second embodiments, the cooling device is provided with partitions that partition the interior in the left-right direction instead of partitions that partition the interior in the vertical direction, and the first and second chambers are formed in the horizontal direction. Is also good.

Reference Signs List 10 Cooling device 12

Cooling coils

14a, 14b Fan 15 Fan 16 Partition plate

20a First chamber

20b Second chamber

22a First door

22b Second door 30 Cooled object 50 Cooling device 52

Cooling coils

54a,

54b Fan

55a ,

55b Fan

56a, 56b Fan 58 Conveyor 62 Partition plate

70a First chamber

70b Second chamber 80 Cooled object

Claims

A partition having therein a first chamber and a second chamber into which the object to be cooled is introduced, and an opening provided to connect the first chamber and the second chamber;
A cooling coil disposed in the opening,
A plurality of first fans provided on a side opposite to the second chamber with the cooling coil interposed therebetween, wherein the partition is provided with a gap communicating from the second chamber to the first chamber. A cooling device that is provided so as not to occur substantially.
The cooling device according to claim 1,
A cooling device, wherein an airflow from the second chamber to the first chamber passes through the cooling coil.
The cooling device according to claim 2,
A cooling device, wherein the plurality of first fans are spaced apart from each other.
The cooling device according to claim 3,
A cooling device further comprising a second fan for blowing air to the object to be cooled in the second chamber.
A partition having therein a first chamber and a second chamber into which the object to be cooled is introduced, and an opening provided to connect the first chamber and the second chamber;
A cooling coil disposed in the opening,
A fan provided in the first chamber and blowing air to the cooling coil;
The partition is provided such that a gap from the second chamber to the first chamber does not substantially occur except for the opening where the cooling coil is arranged,
A cooling device in which an airflow from the second chamber to the first chamber passes through the cooling coil.
A partition having therein a first chamber and a second chamber into which the object to be cooled is introduced, and an opening provided to connect the first chamber and the second chamber;
A cooling coil disposed in the opening, through which an airflow from the first chamber to the second chamber and an airflow from the second chamber to the first chamber pass;
A fan provided in the first chamber and blowing air to the cooling coil;
The cooling device, wherein the partition is provided such that a gap from the second chamber to the first chamber does not substantially occur except for the opening where the cooling coil is arranged.