JPH0726783B2 - High humidity low temperature case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a cold air forced circulation type high humidity low temperature case equipped with an evaporator and a blower fan.

(B) Conventional technology There are the following means for maintaining high humidity inside the low temperature case.

A) As described in the high humidity / low temperature case of Japanese Utility Model Publication No. 62-9511 (F25D23 / 00), the dew is accumulated on the bottom of the chamber or the water pan to allow this dew to spontaneously evaporate.

B) As described in the constant temperature and humidity chamber of Japanese Utility Model Publication No. 51-105168 (70B18), water is atomized by an ultrasonic humidifier to humidify the inside of the chamber.

C) As described in JP-A-63-172876 (F25D 23/00), "Humidifying method for freezing-refrigerating closed showcase", two evaporators are alternately cooled and defrosted, and one of them is evaporated. A device that cools and defrosts the other evaporator to evaporate the dew from the other evaporator to humidify the interior.

(C) Problems to be Solved by the Invention Among the above-mentioned conventional techniques, A) is a natural evaporation, so that the amount of humidification is small, and the accumulated dew is mixed with juice and dust from food, There is a problem that it is unhygienic, and B) is apt to be overhumidified and the food surface gets wet,
Since maintenance and inspection of the ultrasonic humidifier must be performed regularly, there is a problem in terms of work. In addition, in C), since the space of the cooling chamber is large, the space in the refrigerator is small and the evaporator is There is also a problem that the manufacturing cost becomes high because of the individual use.

The present invention aims to solve the above problems.

(D) Means for Solving the Problems In order to solve the above problems, the present invention provides a plate fin type evaporator, a water evaporation plate disposed directly below the evaporator with a space, and the water evaporation. The plate is provided with a large number of small holes formed for adhering dew on both front and back surfaces, and a blower fan arranged to face the evaporator and the moisture evaporation plate,
The air flow from the blower fan was passed through the evaporator and was made to flow along both the front and back surfaces of the water vaporization plate, and the means for forcedly evaporating the dew dropped from the evaporator by the air flow was adopted.

(E) Action According to the above means, dew drops from the evaporator on the moisture evaporation plate during defrosting, and when the amount of dew on the moisture evaporation plate reaches a predetermined amount, almost the entire surface becomes wet, and Dew that drips downward from (23) is diffused to the back surface of the moisture evaporation plate by the forced circulation air flow from the blower fan, and the back surface becomes wet as well as the front surface, and the dew on both sides of the moisture evaporation plate is forced by the forced circulation air flow. Will be evaporated into.

Also, because the water vaporization plate is spaced apart from the evaporator, the dew on the water vaporization plate should freeze even if the refrigerant vaporization temperature of the evaporator is a negative temperature below 0 ° C by several degrees. Rather, even during the cooling operation, the dew remaining on the water evaporation plate is evaporated by the forced circulation air flow and returned to the storage chamber.

(F) Example An example of the present invention will be described below with reference to the drawings.
(1) is a closed-type high-humidity / low-temperature case suitable for cold-preserving articles such as fresh confectionery, for example, cakes, and includes a storage room (2) and a cooling room (3) located directly below the storage room.
And the machine room (4) located directly below the cooling room constitutes the main body. The storage chamber (2) has a curved transparent plate (5) arranged from the front surface to the upper surface, and a plurality of transparent doors (7) slidable in the left-right direction in a frame (6) arranged on the back surface. ) And transparent side plates (8) arranged on both left and right side surfaces, respectively, inside of which a removable bottom plate (9) also serving as a partition plate, a shelf (10) and a fluorescent lamp (11) are provided. There is. The bottom plate (9) is the storage and cooling chambers (2).
(3) is divided into upper and lower parts, and an outlet (12) is formed along the trailing edge and a suction port (13) is formed along the front edge, and the storage and cooling chambers (2) are formed through both the outlet and the suction port. ) (3)
Is configured to communicate. The cooling chamber (3) has a heat-insulating wall (1) having an open upper surface for mounting and supporting the storage chamber (2).
4), and the machine room (4) has the heat insulation wall (1
It is formed below 4). The heat insulating wall (14) has a drainage port (15) in the bottom wall, and constitutes a base (17) together with a metal base leg (16).

(20) is a plate fin type evaporator arranged in the cooling chamber (3), and two water evaporation plates (21) (22) made of thin stainless steel plate etc. are placed directly under this evaporator in order of 1 cm.
They are arranged at a slight interval in the direction of the drainage port (15) with a slight interval. The water evaporation plate (21) (2
2) A large number of small holes (23) are formed, and the size of these holes is 2 mm to 8 mm in diameter, and the distance between the holes (23) and the adjacent holes (22) is the same or double the above diameter. However, the hole (23) and the interval of the upper moisture evaporation plate (21) may be set larger than the holes (23) and the interval of the lower moisture evaporation plate (22). Also, both of the water vaporization plates (21) (2
At both front and rear edges of 2), directional sides (24) that extend outward and are inclined more than the air inlet surface and outlet surface of the evaporator (20).
(25) is formed. The surface area of the evaporator (20) is increased, for example, the number of fins is increased in the evaporator (20).
In case of arranging, the number of water vaporization plates may be increased. (26) is a pair of left and right metal supporting bases arranged on the bottom wall of the heat insulating wall (14), and the evaporator (2
Both the left and right ends of the tube plate (20A) and both water vapor evaporation plates (21, 22) of (0) are fixed. (27) is a cover plate that covers the upper surface of the evaporator (20), and (28) shields the space between the left and right side walls of the heat insulation wall (14) and the evaporator (20) and the support (26). It is a shield plate that does.

(30) is a blower fan that is arranged in the cooling chamber (3) and is always operated, and is opposed to the air inlet surface of the evaporator (20) and one ends of both the moisture evaporation plates (20) and (21), As shown by the arrow in FIG. 4, the cold air that has undergone heat exchange in the evaporator (20) is forcedly circulated.

The evaporator (20) is alternately cooled and defrosted at predetermined time intervals, and during the defrosting during this time, the evaporator (20) is defrosted.
Dew drops from the water evaporation plate (21) from the hole, and when the amount of dew on the water evaporation plate (21) reaches a predetermined amount, it drops from the hole (23) to the water evaporation plate (22) below and both water vapors are evaporated. Plates (21) (22)
The surface (upper surface) of the water is wet with dew, which is a so-called wet state. On the other hand, the dew dripping from the hole (23) as shown by the chain line in FIG. ) (23) is diffused to the back surface (bottom surface), and the back surface becomes wet just like the front surface, and the forced circulation air flow forces the dew on both moisture evaporation plates (21) and (22) to evaporate and is included in the air flow. Are returned to the storage room (2) to humidify the article.

Further, since the water vaporization plate (21) is arranged at a distance from the evaporator (20), the refrigerant vaporization temperature of the evaporator (20) is 0.
The dew on the water evaporation plate (21) does not freeze even if the humidity is below a few degrees Celsius, and the dew remaining on the water evaporation plate (21) (22) is forcedly circulated even during the cooling operation. Since it is evaporated by the air flow, both cooling and humidifying effects can be obtained.

Further, the water vaporization plates (21) (22) are thin plates, and because they have a shape that allows dew to adhere to both front and back surfaces, they are inexpensive as component parts and require a small accommodation space.

(G) Effects of the Invention According to the present invention described above, the following effects are produced.

As the dew drops from the evaporator, the surface of the moisture evaporation plate becomes wet with dew, which is a so-called wet state, while the dew dripping from the holes diffuses to the back surface of the moisture evaporation plate by the forced circulation airflow from the blower fan. As the back surface is wetted like the front surface, the evaporation area of the water evaporation plate is large and the amount of dew evaporated by the forced circulation air flow is large. Can be maintained at a high temperature.

Since the water evaporation plate is arranged with a gap from the evaporator, the dew on the water evaporation plate does not freeze even if the refrigerant evaporation temperature of the evaporator is a few degrees below 0 ° C. Rather, even during the cooling operation, the dew remaining on the water evaporation plate is evaporated by the forced circulation air flow, so that both cooling and humidifying effects can be obtained.

Since the water evaporation plate is a thin plate and has a shape that allows dew to adhere to both front and back surfaces, it is inexpensive as a component part and requires a small accommodation space, resulting in a low manufacturing cost of the low temperature case.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention high humidity low temperature case,
1 is an enlarged cross-sectional view of an essential part, FIG. 2 is a perspective view of a moisture evaporation plate, FIG. 3 is an enlarged vertical cross-sectional view showing dew formation of the moisture evaporation plate, FIG. 4 is an overall vertical cross-sectional view, and FIG. FIG. 6 is a cross-sectional view showing the attachment of an evaporator and a moisture evaporation plate. (20) …… Evaporator, (21) (22) …… Moisture evaporation plate, (2
3) …… hole, (30) …… blower fan.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Tetsukawa 2-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Teruo Yasuda 2-18-2 Keihanhondori, Moriguchi-shi, Osaka Sanyo Inside the Denki Co., Ltd. (56) References Actual Public Sho 49-16994 (JP, Y2) Actual Public Sho 61-15491 (JP, Y2)

Claims (1)

[Claims] 1. A plate fin type evaporator, a moisture evaporation plate arranged directly below the evaporator with a space therebetween, and a large number of water vaporization plates formed on the water vaporization plate to adhere dew on both front and back surfaces. And a blower fan arranged to face the evaporator and the water vaporization plate, and allows the airflow from the blower fan to pass through the evaporator and also to flow along the front and back surfaces of the water vaporization plate. Low temperature case.