JPH0341266Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an open case having an inner air passage and an outer air passage.

(Prior Art) Conventionally, as shown in FIG. 4, there is an inner air passage A that extends across the upper part of the lower wall 2 of the open case main body 1, the lateral center of the back wall 3, and the lower part of the upper wall (not shown). and an outer air passage B extending across the lower part of the lower wall 2, both sides of the back wall 3 in the lateral direction, and the upper part of the upper wall, the outer air passage B of the lower wall 2 An open show case is known in which an air path changing body 4 is provided inside the case and the width thereof becomes wider toward the back wall 3, and blowers 5 for the outside air path are arranged at the lower portions of both sides of the back wall 3. (Jitko No. 55-10853).

In such an open show case, among the air taken into the outside air passage B from the air intake port 6 of the lower wall 2, the air taken in from the center in the lateral direction is also diverted from the back by the air passage changing body 4. The air is guided to both sides of the wall 3 in the lateral direction, and is blown into the outside air passage B on the back wall 3 side.

(Problems to be Solved by the Invention) In the conventional open show case, the air flowing through the outside air passage B of the lower wall 2 is controlled by the air blowers 5 provided on both sides of the back wall 3. Therefore, the intake air near both sides of the air intake port 6 is drawn in efficiently, but the efficiency of the intake air near the center decreases, and the circulating air becomes uneven, resulting in the formation of a uniform air curtain. The problem was that it was not possible.

(Object of the invention) In view of the above-mentioned conventional problems, the present invention attempts to provide an open show case that can form a uniform air curtain.

(Means for Solving the Problems) In order to achieve the above object, the present invention extends across the upper part of the lower wall of the case body, the lateral center of the back wall, and the lower part of the upper wall, and an inner air passage whose both ends communicate with the inner air outlet and intake port provided at the upper and lower ends of the opening, respectively, and which extends across the upper part of the lower wall, both sides of the inner air passage in the back wall, and the lower part of the upper wall. and an outer air passage whose both ends communicate with an outer air outlet and an air inlet provided at the upper and lower ends of the front opening, respectively, and blowers arranged on both sides of the outer air passage on the back wall side, In the open show case in which a two-layer air curtain is formed at the front opening by blowing air from the inner air passage and the outer air passage, the outer air passage has a plurality of through holes on the air intake side. In addition, a wind speed control device is provided to partition the outer air passage, and the opening area of each through hole is larger toward the center in the lateral direction of the case body and smaller toward both sides in the lateral direction.

(Function) According to the present invention, the outer air passage formed in the lower wall is provided with a wind speed control device that partitions the outer air passage and has a plurality of through holes, and the opening surface of each of the through holes is connected to the case. Since the lateral center of the main body is made larger, and the lateral sides of the case main body are made smaller, the speed of air flowing into the outer air passage of the lower wall is adjusted by the through holes, and the lower wall The inflow of air into the outer air passage becomes uniform.

(Example) Figures 1 and 2 show a first embodiment of the present invention, in which 10 is an open case body (hereinafter referred to as the case body) with an opening (opening 10a) at the front, and a heat insulating material. It has an outer box 11 filled with the following: an inner box 12 disposed at a predetermined distance from the top and back of the outer box 11; and a bottom plate 13 disposed at a predetermined distance from the bottom of the outer box 11. The outer box upper part 11
a and the inner box upper part 12a form the upper wall 14, and the outer box back part 11b and the inner box back part 12b form the back wall 1.
5, the outer box lower part 11c and the bottom plate 13 constitute a lower wall 16, respectively. In addition, the upper wall 14
Partition plates 17a and 17b are provided between the gap and the lower wall 16 to partition the gap into an upper and lower part, respectively. Further, as shown in FIG. 2, an evaporator 19 is provided at the lower part of the gap near the center of the back wall 15 in the lateral direction via a mounting plate 18, and above the evaporator 19 is a first evaporator 19. A second blower 20a is provided in the gap on both sides of the back wall 15 in the lateral direction.

As a result, the partition plate 17b of the lower wall 16
An inner air passage A is provided above, in the gap near the center of the back wall 15 in the lateral direction, and below the partition plate 17a of the top wall 14; Gap on both sides in the lateral direction and the upper wall 1
Outside air passages B are formed above the partition plates 17a of No. 4, respectively. Further, air outlets 21a and 21b are provided at the tip of the upper wall 14, respectively, and air intake ports 22a and 22b are provided at the upper end of the lower wall 16, respectively, so that two layers of air are provided in the opening 10a of the case body 10. forming a curtain.

Reference numeral 30 denotes a pair of wind speed control devices, each of which is located on both sides of the case body 10, and is connected to the partition plate 1.
7b and the outer box lower part 11c. Further, each wind speed control device 30 is connected to the case body 1.
An elongated first wind speed control plate 3 extending in the front-rear direction of 0
1, and a second wind speed control plate 32 extending from one end of the front side of the first wind speed control plate 31 in the side direction of the case body 10, the first wind speed control plate 31
Flange portions 31a and 31b are provided on the upper and lower sides of the case body 10, respectively, and extend toward the center side in the lateral direction of the case body 10, and are attached to the partition plate 17b and the outer box lower part 11c. Further, each of the wind speed control plates 31 and 32 is provided with a plurality of through holes 33a and 33b at predetermined intervals in the longitudinal direction, and the opening surface of each of the through holes 33a of the first wind speed control plate 31 is large, the second
The opening surface of each through hole 33b of the wind velocity control plate 32 is formed small to control the flow velocity of air from the outer air passage B of the lower wall 16 to the outer air passage B of the back wall 15.

According to this embodiment, the outer air passage B of the upper wall 14
The air blown out from the air outlet 21a (broken line in the figure) passes through the opening 10b of the case body 10, and reaches the lower wall 1 via the air intake port 22a.
Further, the incoming air flows into the outer air passage B of the back wall 15 via the wind speed control device 30. At this time, the wind speed control device 30 has respective wind speed control plates 31 and 32, and the first wind speed control plate 31 has a through hole 33a with a large opening surface.
Since the second wind speed control plate 32 has a through hole 33b with a small opening surface, the flow velocity of the air flowing in from both sides of the air intake port 22a is controlled by the first wind speed control plate 32. On the other hand, the flow velocity of air flowing in from the center of the air intake port 22a is not so regulated.

Therefore, the air (air curtain) blown out from the air outlet 21a also becomes uniform and flows into the air intake port 22a.

FIG. 3 shows a second embodiment of the present invention.
Reference numeral 40 denotes a wind speed control device provided along the lateral direction of the case body 10, which is composed of a horizontally long wind speed control plate 41 and flange portions 42a and 42b extending horizontally from the upper and lower ends of the wind speed control plate 41. control board 41
is provided with a through hole 43 whose opening surface becomes smaller from the center toward both ends, and is attached between the outer box lower part 11c and the partition plate 17b via the respective flanges 42a and 42b. It is.

According to this embodiment, the wind speed in the outer air passage B can be controlled with one wind speed controller 40. Note that the other configurations and effects are the same as those of the first embodiment.

(Effects of the invention) As explained above, according to the invention, a wind speed control device is provided to partition the outer air passage, and the opening area of each through hole is larger toward the center in the lateral direction of the case body, and toward both sides in the lateral direction. Since it is formed small, the velocity of the air flowing into the outer air passage of the lower wall is adjusted by each of the through holes, which has the advantage that a uniform air curtain is formed.

[Brief explanation of drawings]

Figures 1 and 2 show a first embodiment of the present invention, with Figure 1 being a longitudinal cross-sectional view of an open show case, and Figure 2 being a partially omitted cross-sectional perspective view showing the main parts of the present invention. , FIG. 3 is a perspective view showing a second embodiment of the present invention, and FIG. 4 is a perspective view showing the internal structure of a conventional open show case. In the figure, 10...Case body, 10a...Opening, 14...Top wall, 15...Back wall, 16...Bottom wall, 20a, 20b...Blower, 21a...Air outlet, 22a... Air inlet, 30, 40...
Wind speed control device, 33a, 33b, 43... through hole,
A...Inner air tract, B...Outer air tract.

Claims (1)

[Scope of claim for utility model registration] Inner air vents extending across the upper part of the lower wall of the case body, the lateral center of the back wall, and the lower part of the upper wall, and provided at the upper and lower ends of the opening on the front side of the case body, respectively. an inner air passage communicating at both ends with the outlet and the inlet;
External airflow extending over the upper part of the lower wall, both sides of the inner airflow path in the back wall, and the lower part of the upper wall, and having both ends communicated with the external air outlet and inlet provided at the upper and lower ends of the front opening, respectively. and blowers respectively disposed on both sides of the back wall side of the outer air passage, and a two-layered air curtain, an inner and outer layer, is provided at the front opening by blowing air from the inner air passage and the outer air passage. In an open show case that has a plurality of through holes on the air intake side of the outer air passage, and a wind speed control device that partitions the outer air passage, the opening area of each of the through holes is equal to that of the case body. An open-shoulder case characterized by a larger lateral center and smaller lateral sides.