JPH10103846A - Honeycomb for cold air discharging port and cooled open showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the freezing of condensate or the narrowing as well as clogging of through holes by a method wherein a multitude of through holes, which is subjected to water repelling treatment, are equipped on the inner surface of a honeycomb for a cold air discharging port. SOLUTION: A cooled open showcase 1 is provided with a commodity storage chamber 18, a commodity receiving and take-out port 2, a honeycomb 26 for cold air discharging port, suction ports 29a, 29b, cold air passages 16a, 16b, a fan 21 and a cooler 22. In this case, water repellen treatment is applied on the inner surfaces of through holes 27 of a honey-comb 26 for cold air discharging port. Air, discharged out of the cold air discharging port, forms air curtains 28a, 28b at the commodity receiving and take-out port 2. On the other hand, the cooled open showcase 1 repeats cooling operation, cooling the commodity storage chamber 18 by the cooler 22, and defrosting operation, removing frost adhered to the cooler. In this case, the water repellent capacity of the through holes 27 of the honeycomb 26 for cold air discharging port is improved whereby condensate or the like in the through holes 27 is repelled and the stagnation of the condensate in the through holes is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold air outlet honeycomb provided at a cool air outlet and a cooling open showcase provided with the cold air outlet honeycomb.

[0002]

2. Description of the Related Art A conventional cold air outlet honeycomb and a cooling open showcase of this kind are disclosed in
This is described in, for example, Japanese Unexamined Patent Publication No. 32306 (B32B3 / 12), and the honeycomb for the cool air discharge port is made of aluminum or resin. Then, the cool air cooled by the cooler is discharged from the cool air discharge port having the honeycomb for the cool air discharge port to form an air curtain. This air curtain blocks the interior of the cooling open showcase from outside air. Further, since frost adheres to the cooler, the cooler is sometimes heated by a heater or the like to perform defrosting. During this defrosting operation, air is discharged from the cool air discharge port at a substantially constant air volume.

[0003]

By the way, during the cooling operation in which the cool air is discharged from the cool air discharge port, the honeycomb for the cool air discharge port is cooled down by the cool air.
On the other hand, during the defrosting operation, air with a high relative humidity heated by a heater or the like is discharged from the cool air discharge port, and the heated air comes into contact with the surface of the cool air discharge port honeycomb. Therefore, when the operation is switched from the cooling operation to the defrosting operation, the warmed air may come into contact with the cold-air discharge-port honeycomb that is low in the cooling operation, and dew condensation may occur.

[0004] The honeycomb for the cold air discharge port is made of aluminum or resin as described above, and there is no problem in strength due to the dew water, but the dew water remains attached to the honeycomb for the cold air discharge port. It may be. Then, when the operation is switched from the defrosting operation to the cooling operation, the condensed water adhered to the cold air discharge port honeycomb may freeze, thereby narrowing or clogging the through hole of the cold air discharge port honeycomb. When the through holes of the cold air discharge port honeycomb are narrowed or clogged, the flow of the air curtain becomes uneven and disturbed, and the ability to shut off the inside of the cooling open showcase from the outside air is reduced. As a result, the cooling efficiency for cooling the inside of the refrigerator decreases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent condensation of condensed water in a cold air discharge port honeycomb from narrowing or clogging. And

[0006]

The honeycomb (26) for a cold air discharge port according to the present invention has a large number of through holes (27), and the inner surface of the through holes is subjected to a water repellent treatment. ing.

[0007] Antibacterial treatment may be performed together with the water repellent treatment.

The cooling open showcase (1) according to the present invention comprises a product storage room (18), a product storage and take-out opening (2) formed on at least one surface of the product storage room, and a product storage room. Cold air discharge ports (24a, 24b) arranged at one end of the storage and removal opening
And a honeycomb for the cool air discharge port disposed at the cool air discharge port, a suction port (29a, 29b) disposed at the other end of the product storage and take-out opening, and suction from the suction port. A cool air passage (16a, 16b) for guiding air to the cool air discharge port, and a blower (21) for blowing air from the cool air passage from the suction port to the cool air discharge port.
And a cooler (22) for cooling the air in the cold air passage. Then, the air discharged from the cool air discharge port is supplied to an air curtain (28
a, 28b), wherein the cooling open showcase comprises a cooling operation for cooling the commodity storage room by a cooler;
The defrosting operation for removing the frost attached to the cooler is repeated. In the latter half of the period of the defrosting operation, a wind speed increasing operation for increasing the wind speed in the cold air outlet honeycomb is performed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a honeycomb for a cool air discharge port and a cooling open showcase according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a cooling open showcase according to the present invention. FIG. 2 is a sectional view of FIG. FIG. 3 is an enlarged cross-sectional view near the cool air discharge port. FIG. 4 is a perspective view of a honeycomb for a cool air discharge port.

A refrigerated open showcase 1 as a refrigerated open showcase has an opening 2 for accommodating and removing commodities formed in the front thereof, and a refrigerant compressor (not shown) constituting a refrigeration cycle provided below. The machine room 3 is arranged. The upper wall 8, the rear wall 9 of the showcase 1 and the bottom wall 10 which is a partition wall between the showcase 1 and the machine room 3 are made of a heat insulating material 11 made of a foamed synthetic resin such as hard foamed polyurethane.

A partition top plate 13, a partition wall plate 14, and a partition floor plate 15, which are made of a non-rusting metal plate such as a coated steel plate or stainless steel, are disposed at an appropriate distance from the inner surface of the heat insulating material 11. The space between the partition top plate 13, the partition wall plate 14, the partition floor plate 15 and the heat insulating material 11 serves as a cool air passage 16. The cold air passage 16 is partitioned by the partition plate 17 into two cold air passages, an inner cool air passage 16a and an outer cool air passage 16b. And the partition top plate 13 and the partition wall plate 1
Product display shelves 19 are provided in multiple stages in a display room 18 as a storage room surrounded by the floor 4 and the partition floor plate 15. A fluorescent lamp 20 is attached to the upper front side of the display room 18 and the lower front side of the product display shelf 19 to illuminate the inside of the display room 18.

Further, a cool air passage 16 below the partition floor plate 15 is provided.
Is provided with a blower 21. The partition plate 17 is not provided in the portion where the blower 21 is disposed, and the inner cool air passage 16a and the outer cool air passage 16b join. A cooler 22 is disposed in the inner cold air passage 16a on the rear side of the partition wall plate 14, and a heater 23 is provided below the cooler 22, that is, upstream of the flow of air. Then, the inside cold air passage 16 of the cold air passage 16 is formed.
One end of “a” reaches an inner cool air discharge port 24 a formed on the front side of the partition top plate 13. In addition, the outer cold air passage 16
One end of b reaches the outer cold air outlet 24b located outside the inner cold air outlet 24a.

The inner and outer cold air discharge ports 24a,
Reference numeral 24b extends elongate across the left and right sides of the showcase 1, and inside thereof are provided left and right elongate cold air discharge honeycombs 26, 26 shown in FIG. A large number of through holes 27 are formed in the honeycomb 26 for the cool air discharge port in a honeycomb shape. In FIG. 4, the through-hole 27 is shown only on the left side of the honeycomb 26 for the cool air discharge port, and is not shown on the right side of the honeycomb 26 for the cool air discharge port. The through holes 27 on the right side of the honeycomb 26 for the cool air discharge ports are arranged in the same pattern as the through holes 27 on the left side.

The main body of the cold air discharge honeycomb 26 is as follows.
It is made of a metal such as aluminum or a resin such as polyvinyl chloride or polyester, does not cause a problem in strength even if water adheres thereto, and has water repellency although its ability is low. The body of the cold air discharge port honeycomb 26, particularly the inner surface of the through hole 27, is subjected to a water repellent treatment by applying a super water repellent film plating such as, for example, a fluorine-based oligomer composite plating. Has improved water repellency. Further, at the time of this super water repellent film plating, for example, an antibacterial material such as silver can be contained in the plating material, and the antibacterial treatment can be performed at the same time.

In the cooling operation for cooling the display room 18 of the showcase 1, the refrigeration cycle is operated to supply the refrigerant to the cooler 22 and the blower 21 rotates, so that the cool air flow path 16 The air inside is blown in the direction of the arrow and forcedly circulates. That is, the air blown from the blower 21 branches and flows into the inner cool air passage 16a and the outer cool air passage 16b, and the air flowing through the inner cool air passage 16a moves to the cooler 22 where it is cooled and rises to cool the inner cool air passage 16a. Discharge port 24
a into the display room 18. The cool air blown out from the cool air discharge port 24 a forms an inner air curtain 28 a at the front surface of the display room 18, that is, at the product storage / removal opening 2, and cools the inside of the display room 18. The air is sucked from the formed inner suction port 29a and returns to the blower 21.

On the other hand, the air flowing into the outer cool air passage 16b rises and is discharged from the outer cool air discharge port 24b to form the outer air curtain 28b. The outer air curtain 28b is the same as the inner air curtain 28 described above.
a outside the air curtain and outside air curtain 2
The air forming 8b is sucked from the outer suction port 29b disposed outside the inside of the inner suction port 29a and returns to the blower 21.

As described above, during the cooling operation, the display room 18 is cooled by the inner air curtain 28a while the inner air curtain 28a is protected from the outside air by the outer air curtain 28b. The set temperature of the display room 18, that is, the internal temperature can be changed as appropriate. For example, when the internal temperature is set to about 0 ° C, the temperature of the air at the inner cold air discharge port 24a is 0 ° C or less. Need to be The air at a temperature of 0 ° C. or lower cools the honeycomb 26 for the cool air discharge port disposed inside the cool air discharge port 24a, and the temperature of the honeycomb 26 for the cool air discharge port also becomes 0 ° C. or lower.

Further, during the cooling operation, frost gradually arrives at the cooler 22 and the cooling efficiency of the cooler 22 decreases, so that a defrosting operation for removing the frost from the cooler 22 is performed from time to time.
In this defrosting operation, first, a thawing operation is performed in which the refrigeration cycle is stopped, the heater 23 is operated, and the heater 23 heats the cooler 22 to defrost the frost. Also during this thawing operation, the blower 21 is operating, and the temperature of the air flowing through the inner cold air passage 16a rises. Since the temperature rises and the humid air comes into contact with the cool air discharge port honeycomb 26, dew condensation occurs in the cool air discharge port honeycomb 26, particularly in the through hole 27. Conventionally, this condensed water is used as a cold air discharge honeycomb 2 having a low water repellency.
6, the honeycomb 26 for the cool air discharge port in this embodiment has been subjected to the water repellent treatment to improve the water repellency, and the cold air discharge port The dew water adhering to the honeycomb 26 is repelled and quickly flows downward.

After completion of the thawing operation, a draining operation is performed, for example, for about 5 minutes. During this draining operation, the heating of the heater 23 is stopped, and the operation of the blower 21 is maintained, and the defrost water of the cooler 22 and the drain water in the cool air passage 16 are drained out of the cool air passage 16. . Immediately before the end of the draining operation, for example, for 30 seconds from 4 minutes 30 seconds to 5 minutes after the start of the draining operation, the air volume of the blower 21 is increased, and the air flowing through the through hole 27 of the honeycomb 26 for the cool air discharge port is increased. The wind speed increasing operation for increasing the wind speed is performed. By this wind speed increasing operation, the movement of the condensed water adhered to the honeycomb 26 for the cool air discharge port is promoted and discharged from the through hole 27. As described above, the defrosting operation includes the thawing operation and the draining operation, and the wind speed increasing operation is performed in the latter half of the defrosting operation. After the defrosting operation is completed, the cooling operation is restarted, and the defrosting operation and the cooling operation are repeated.

As described above, the water repellency treatment improves the water repellency of the cold air discharge port honeycomb 26, and the wind speed increasing operation in the latter half of the defrosting operation allows the through hole 2 of the cold air discharge port honeycomb 26 to increase.
Since the dew water adhering to the inside 7 is discharged to the outside of the hole 27, when the cooling operation is restarted, the dew condensation water in the through hole 27 of the honeycomb 26 for the cold air discharge port is reduced from freezing, and the freezing is reduced. The narrowing or clogging of the through hole 27 can be prevented. Furthermore, when the anti-bacterial treatment is performed on the cold air outlet honeycomb 26, it is possible to prevent the germs from propagating in the cold air outlet honeycomb 26. As a result, the spread of the germs on the air curtain is further reduced, which is hygienic.

As described above, in the embodiment, since the inner surface of the through hole 27 of the cold air discharge port honeycomb 26 is treated for water repellency, the water repelling performance of the through hole 27 is improved, and Stagnation in the through hole 27 is reduced. As a result, it is possible to prevent the through hole 27 from being narrowed or clogged by the frozen dew water. In addition, since the cold air discharge port honeycomb 26 main body is made of metal or resin, the water repellency treatment is incomplete, and the water repellency treated part is damaged or deteriorated. In addition, the strength of the cold air outlet honeycomb 26 is less likely to be reduced.

The embodiment of the present invention has been described above in detail.
The present invention is not limited to the above embodiment,
Within the gist of the present invention described in the claims,
Various changes can be made. Modification examples of the present invention are exemplified below. (1) In the embodiment, the cooling open showcase is a refrigerated open showcase, but may be a frozen open showcase.

(2) In the embodiment, the air curtain is formed double on the inside and outside, but it is also possible to form a single air curtain or an air curtain with three or more layers. (3) In the embodiment, the water repellency treatment is performed by plating. However, if the water repellency is improved as compared with the honeycomb body for the cold air discharge port, another water repellency treatment may be performed. It is possible.

(4) In the embodiment, the cooler 22
Although the frost adhered to is thawed by the heating of the heater 23, it can be thawed by another method. For example, hot gas can be flown through the cooler 22 to defrost. (5) In the embodiment, the air curtain is formed in the vertical direction, but may be formed in the horizontal direction.

(6) The water repellent treatment of the honeycomb 26 for the cool air discharge port can be performed on the entire honeycomb 26 for the cool air discharge port, or the inner surface of the through hole 27 can be focused. . (7) In the embodiment, the wind speed increasing operation is performed by increasing the amount of air blown by the blower 21. However, it is also possible to increase the wind speed in the cold air outlet honeycomb 26 by another method. Further, if the wind speed increasing operation is performed in the latter half of the defrosting operation, it is not necessary to perform the entire operation in the latter half of the defrosting operation, and the operating period and operating time of the wind speed increasing operation can be changed as appropriate. As in the embodiment, the defrosting operation can be performed only immediately before the end of the defrosting operation.
If the wind speed increasing operation is performed immediately before the end of the defrosting operation, the dew water adhering to the through holes 27 can be efficiently removed.

(8) In the embodiment, both the water repellency treatment of the cold air discharge port honeycomb 26 and the operation of increasing the wind speed are performed, but it is also possible to perform only one of them. However, the effect of preventing clogging of the through holes 27 increases when both are performed.

[0027]

According to the present invention, the inner surface of the through hole of the cold air discharge port honeycomb of the present invention is subjected to a water repellent treatment, so that the water repellency of the through hole is improved, and dew condensation water formed in the through hole is formed. Repelling water and condensed water is less likely to stop at the through hole. Therefore, it is possible to prevent the through hole from being narrowed or clogged by freezing of the dew condensation water.

When the antibacterial treatment is performed together with the water repellent treatment, the germs are less likely to propagate in the cold air outlet honeycomb, so that the germs can be prevented from being scattered. . Therefore, it is hygienic.

Further, in the cooling open showcase of the present invention, a wind speed increasing operation for increasing the wind speed in the honeycomb for the cool air discharge port is performed at a later stage of the defrosting operation. Therefore, in the early stage of the defrosting operation or the like, dew water may condense on the honeycomb for the cool air discharge port.The dew water is swept by the wind during the wind speed increasing operation and is discharged from the honeycomb for the cool air discharge port, and the cold air is discharged. It is less likely to stop at the discharge port honeycomb. As a result, when restarting the cooling operation,
Condensed water is less likely to freeze in the cool air discharge port honeycomb, and narrowing or clogging of the through hole of the cool air discharge port honeycomb is reduced. Since the through holes are less likely to be narrowed and clogged in this manner, disturbance of the flow of the air curtain is reduced, and the cooling efficiency of the storage room of the cooling open showcase is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cooling open showcase according to the present invention.

FIG. 2 is a sectional view of FIG. 1;

FIG. 3 is an enlarged cross-sectional view near a cool air discharge port.

FIG. 4 is a perspective view of a honeycomb for a cool air discharge port.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Refrigerated open showcase (cooled open showcase) 2 Commodity storage and removal opening 16a, 16b Cold air passage 18 Display room (commodity storage room) 21 Blower 22 Cooler 24a, 24b Cold air discharge port 26 Honeycomb for cold air discharge port 27 Communication Holes 28a, 28b Air curtains 29a, 29b Suction port

Claims (3)

[Claims] 1. A cold air discharge port honeycomb having a plurality of through holes, wherein a water repellent treatment is applied to an inner surface of the through hole. 2. An antibacterial treatment is applied to an inner surface of the through hole as well as a water repellent treatment.
The honeycomb for the cold air discharge port described. 3. A product storage room; a product storage and take-out opening formed on at least one surface of the product storage room; a cool air discharge port arranged at one end of the product storage and take-out opening; A honeycomb for a cool air discharge port provided at the discharge port, a suction port disposed at the other end of the product storage and take-out opening, and a cool air for guiding air sucked from the suction port to the cool air discharge port. A passage, a blower that blows air from the cool air passage from the suction port to the cool air discharge port, and a cooler that cools the air in the cool air passage, and the air discharged from the cool air discharge port is used for storing goods and A cooling operation for cooling an article storage room by the cooler, and a defroster for removing frost adhering to the cooler, while forming an air curtain at the take-out opening. In the cooling open showcase which repeatedly and operation, late in the defrosting period operation, the cooling open showcase, characterized in that the wind speed increases operation to increase the air speed in the honeycomb for the discharge ports is performed.