JPS608428B2 - Low temperature showcase - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a low-temperature showcase in which a rectifying device having a large number of rectifying holes is disposed at the outlet, and the purpose thereof is to control the flow path of air flowing along the inner surface of the rectifying device. The objective is to improve the rectification characteristics of the air flow inside the air curtain.

Embodiments of the present invention will be explained below with reference to the drawings.
is a low-temperature showcase whose main body is composed of an insulating wall 3 with an opening 2 for storing and taking out products in the front, and a partition plate 4 is placed at an appropriate distance from the insulating wall to cool the product. Vessel 9
and a circulation passageway 5 passing through the blower roof 0, and a storage room 6,
Both the air outlet and suction opposite to the upper and lower ends of the closed opening □7, 8
The cold air that has been heat exchanged with the cooler 9 is sent to the blower 10.
The closed opening 2 is closed and the storage chamber 6 is cooled with a low-temperature air curtain formed by forced circulation as shown by the arrow.

Reference numeral 11 denotes a rectifier that is disposed at the outlet 7 and rectifies the cold air flow from the circulation passage 5 to the closed opening 2. As shown in FIGS. A partition plate that is made of a honeycomb material that is laterally expandable and has a large number of grooves having a trapezoidal cross section, and that encases the air outlet 7 such that the upper and upper surfaces of both the inner and outer surfaces protrude upwardly from the upper surface of the ceiling wall of the partition plate 4. The holding portion 4a of No. 4 and the holding portion 12a of the bran plate 12 are attached.

11a and 11b are trapezoidal shapes that are formed between the inner surface groove of the flow straightening device and the holding portion 4a and between the outer surface groove and the holding portion 12a, respectively, by disposing the flow straightening device 11 at the outlet 7. There are many rectifying holes.

The partition plate forms an expanded path 5a extending from the holding portion 4a in contact with the inner surface of the rectifier 11 to the ceiling wall to widen the circulation passage 5 on the inner surface side of the rectifier, and forms an acute angle with respect to the upper part of the inner surface of the rectifier 11. The front downward slope 4b intersects with
is formed. This inclined portion guides the cold air flow in the circulation passage 5 toward the rectifying hole 11a. Further, the decorative plate has a recess 12b in the upper part of the holding part turtle 2a which is in contact with the outer surface of the rectifying device 11.
is formed. By arranging the straightening device 11 to face the concave portion, the cold airflow from the circulation passage 5 is detoured between the concave portion 12b and the outer surface of the straightening device 11.
A detour 5b is formed that guides the user to point b. The tortoise 3, the tortoise, is an inner and outer baffle plate with different dimensions, which is installed on the inner wall of the heat insulating wall 3 directly above the rectifier 1, and the distance between the lower end of both baffle plates and the rectifier 11 is on the upstream side. The dimensions of the inner baffle plate 3 are made larger than those of the outer baffle plate so that it becomes smaller on the downstream side, and both act as resistance to the cold air flow and reduce the flow from the upstream side to the downstream side of the cold air flow that has flowed above the rectifier 1. According to this configuration, the flow of the cold air is diverted and directed to the rectifying hole 1c. The upper part of the inner surface is arranged so that the inside of the circulation passage S between the heat insulating wall 3 and the husband wall is tilted to increase the pressure of the cold air flow flowing on the expanded channel 5a. It divides the flow and guides one of them to the rectifying hole 13 and the other to the upper surface, and acts as a resistance to the cold air flow and slows down the speed of the cold air flowing to the rectifier hole 13.

Therefore, even if the corners of the upper surface and the inner surface of the rectifying device i are deformed or damaged, a flow path for the cold air flowing to the rectifying hole turtle la can be secured, and the cold air flow from the outlet 7 can be maintained. The air curtain formed by the deformation of the rectifier 11 does not cause turbulence due to breakage, etc. Moreover, the cold air flowing along the inclined part 4b is formed at an obtuse angle with respect to the inner surface of the rectifier 1. Since the rectifying device 1 is directed directly downward, it is not affected by deceleration on the inner surface of the rectifier 1.
As a result, the flow rate and flow velocity per unit time of the cold air flow passing through the straightening hole 1a are larger and farther than those through the other straightening holes 11b and 11c, and the entrainment action in the inner flow of the air curtain is promoted. The size of the cold air mass in the storage compartment 6 is increased, and the cooling effect of the storage compartment 6 can be improved. Figs. 4 and 5 show other embodiments of the present invention.
As described above, the present invention has a main body composed of an insulating wall with a checkpoint at the front, a circulation passageway in which partition plates are arranged at appropriate intervals from the inner wall of the insulating wall and a blower is installed, and a circulation passage above and below the checkpoint. In a low-temperature showcase that has an air outlet and an air inlet facing each other at both ends and closes the entrance with an air curtain created by forced circulation airflow, the front downward slope of the head formed at the front end of the partition plate A flow rectifier made of a honeycomb material, which has an expanded channel in the circulation passage, a large number of flow regulating holes, and a large number of grooves extending vertically on the inner surface, is provided with an upper inner surface thereof protruding upward from the upper surface of the top wall of the partition plate. Since this device is characterized in that it is disposed at the outlet so as to face the gangway, and the groove is used as a rectifying hole, the rectifying device increases the pressure of the cold air flow in the mine channel and also makes it difficult to widen the channel. By increasing the flow rate of the cold air flow flowing along the inner surface of the rectifier and making the flow velocity farther, the entrainment effect of the air curtain inside flow can be increased. The amount of supporting shafts increases, the cooling effect of the storage room can be improved, and
Since the inner cold air flow that hits the inner surface of the rectifier is directed downward at an obtuse angle by the inclined portion, the flow rate and flow velocity of the inner flow of the air curtain can be maintained higher and farther than the flow rate and flow velocity of the cold air flow flowing outside of the air curtain. Furthermore, since the upper inner surface of the rectifier protrudes upward from the top surface of the partition plate, even if the upper inner surface of the rectifier is crushed inward, the inner flow path can be secured by expanding the channel. result"
Improved rectification characteristics of the flow inside the air curtain can be maintained.

[Brief explanation of drawings]

Figure 2 is a vertical sectional view showing an embodiment of the low temperature showcase of the present invention, Figure 2 is an enlarged view of the main part of Figure 3, and Figure 3 is Figure 2A-
A cross-sectional view taken along the line B, and FIGS. 4 and 5 are vertical cross-sectional views of essential parts showing other embodiments of the present invention. 2...'Open □, 3...Insulating wall L 4...Dividing board,
5... Circulation passage, 7... Air outlet, 8... Suction port 18... Air blower, 11... Rectifier, 11a;
11b, 11c... Rectification holes. Koji hating wing koji groove cod koji separation map koji 4 crab shark 6 evil

Claims (1)

[Claims] 1. The main body is composed of a heat insulating wall with an opening at the front, a circulation passageway in which a partition plate is arranged at an appropriate interval from the inner wall of the heat insulating wall and a blower, etc. is installed, and air outlets facing each other at both the upper and lower ends of the opening; In a low-temperature case that forms both suction ports and closes the openings with an air curtain created by forced circulation airflow,
A flow rectifier made of a honeycomb material, which forms an enlarged path in the circulation passage by the front downward slope formed at the front end of the top wall of the partition plate, and has a large number of rectifying holes and a large number of grooves extending in the vertical direction on the inner surface. A low-temperature show case characterized in that an upper inner surface thereof protrudes upward from an upper surface of a ceiling wall of a partition plate, and is disposed at an air outlet so as to face the widened channel, so that the groove portion serves as a rectifying hole.