JPH0639987B2 - Low temperature case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a flat open-type low-temperature showcase in which cold air is blown forward and backward from the upper end of a cold air supply passage formed between two storage chambers. Regarding

(B) Conventional technology JP-B-62-47870 (F25D17 / 08)
Is formed between the two partition walls, each of which has a heat-insulating wall having an open upper surface, two partition walls which are spaced apart from each other in a space surrounded by the heat-insulating wall and each form a storage chamber. At least two struts, which are erected separately from each other in the cold air supply passage, and to which opposite side walls of the partition walls are attached,
Two outlets that are formed in the upper part of the supply passage and blow out cool air in both the front and rear directions, rectifying members that are respectively disposed between the stanchions at the both outlets, and that are positioned outside the rectifying members. Disclosed is a refrigeration showcase having a structure in which a lattice member is arranged over the entire width of both outlets, and projections formed along the upper edges of the both side walls and projecting toward the storage chamber, respectively.

(C) Problems to be Solved by the Invention According to the above-mentioned conventional technique, since the lower portion of the portion of the lattice member facing the column is closed by the overhanging portion, cool air is blown from one portion of the air outlet. Will not be blown toward the top opening. As a result, a so-called non-cooled area where air curtains due to cold air are not formed is formed on both sides or in the center of the upper surface opening.As a result, air curtains are disturbed, and outside air enters the storage chamber violently, causing temperature distribution in the storage chamber. However, there is a problem in that frost is locally formed on the surface in contact with the non-cooled area where the outside air and the cold air are mixed.

(D) Means for Solving the Problems In order to solve the above problems, the present invention provides a heat-insulating wall having an open upper surface and a space surrounded by the heat-insulating wall, which are arranged separately from each other and are respectively stored. At least two partition walls that form a chamber and at least two sidewalls that are erected separately from each other in a cold air supply path formed between the partition walls and that have opposite side walls of the partition walls are attached. Two elongated air outlets formed in the upper part of the supply path between the pillar and the left and right side walls of the heat insulating wall to blow out cool air in both front and rear directions, and both outlets so as to be located between the pillars. A rectifying member respectively disposed on the rectifying member, and a lattice member that is arranged over the entire width of the both outlets so as to be located outside the rectifying member, and that forms a gap serving as a cool air flow path between a portion facing the support column. The upper edges of the opposite side walls of the both partition walls are Lower wall that is bent in the storage compartment direction, by bending the tip of the lower wall upward vertical wall,
The upper wall of which the tip of the hanging wall is bent toward the supply path is formed, and each of the projections extends in the direction of the storage chamber, and the recesses formed by the projections that partially widen the width of the supply path. Where
Formed between the strut of the lattice member and the opposing portion,
Provided is a low temperature showcase including an introduction path for guiding the cool air in the recess to the space between the lattice member and the column.

(E) Action According to the embodiment, the lattice members (55) (55) are the both outlets (14) (15).
Since the rectifying members (54) and (54) are arranged at the both outlets (14) and (15) so as to be located between the columns (40), both the outlets (14) Cold air that has passed through the recesses (46) (46), the introduction passages (50) (50), and the lattice members (55) (55) from the portion of (15) facing each strut (40) is opened at the top surface. It is blown out, while the rectifying member (54) is discharged from most of both outlets (14) (15).
(54), the cold air that has passed through the lattice members (55) and (55) is blown out to the upper opening.

(F) Example An example of the present invention will be described below with reference to the drawings.
Figures 1 and 6 (1) show a frozen flat open-type low-temperature showcase with an open top surface, which is the heat insulating wall that constitutes the main body.
In the interior of (2), two partition walls (3) and (4) with open tops are provided separately from each other.
(5) and (6) are formed. Both partition walls (3) (4) and heat insulation wall
A cooling chamber (9) accommodating the plate fin type coolers (7) and (8) spaced apart from each other is provided between the cooling chamber (9) and (2). Defrosting heaters (10) and (11) consisting of sheath heaters are provided on the air inflow side of both the coolers (7) and (8), and both coolers (7) and (8) are provided on the air outflow side. A common cooling air blower fan (12) is provided. (13) is formed between the adjacent side walls (3A) and (4A) of the partition walls (3) and (4) that are close to each other, and cools the air cooled by the coolers (7) and (8) respectively. (14) Cold air supply channel leading to (15), (16) and (17) are both front and rear side walls (2) of the heat insulating wall (2).
A) (2B) and the side walls (3B) and (4B) close to the both side walls (2A) and (2B) of both partition walls (3) and (4), respectively. A cool air return path that guides the return cool air that has passed through the suction ports (18) and (19) to the respective coolers (7) and (8). The cool air shown by the arrows in FIG. 6 is supplied to the cool chamber (9) and the cool air supply path ( 13), both cold air return path (16) (1
By maintaining the freezing temperature of both storage chambers (5) (6) by forming a cold air curtain (A1) (A2) flowing in different directions in the storage chambers (5) (6) by forced circulation with 7) To do. (20) (21)
Is a transparent window erected on the side walls (2A) (2B) of the heat insulating wall (2), (22) (23) on the side walls (3B) (4B) of the partition walls (3) (4) An upright and detachable transparent partition plate that substantially raises the height at which the air curtains (A1) (A2) are formed by both the transparent window and the transparent partition plate, and both storage chambers (5) ( Along with securing a large effective internal volume of 6), the fluoroscopic effect of both storage chambers (5) (6) is improved. The defrosting heaters (10) and (11) are energized during the defrosting operation, and their lengths are both coolers.
(7) Since it is longer than (8), both ends thereof are bent at substantially right angles as shown in FIG. 7, and both left and right tube plates (7A) (8A) of both coolers (7) (8) and The bent portion (10A) that heats the U-shaped portions (7C) (8C) of the refrigerant tubes (7B) (8B) that penetrate a large number of plate-shaped fins (7D) (8D) and project laterally from both tube plates ) (11A).

(24) (25) shown in FIGS. 7 and 8 are both the coolers (7) (8)
Both tube plates (7A) (8A) are connected to each other, and the cold air supply path (13)
A partition plate made of metal that defines the cold air merging area (9A) in the cooling chamber (9) that communicates with the two coolers connected by these partition plates.
Both coolers (7) (8) due to the arrangement of (7) (8) in the cooling chamber (9)
Between the left and right side walls (2C) (2D) of the heat insulating wall (2) and a space (26) (27) for accommodating pipes extending from the condensation unit (not shown) to both coolers (7) (8). It is possible to prevent the non-heat exchange cold air from flowing into the merging area (9A). That is, both partition plates (24) (2
By arranging 5) from the return path (16) (17) to the supply path (13)
All of the cool air that reaches the above point passes through either of the coolers (7) and (8) to be heat-exchanged, and it is possible to avoid the both gaps (26) and (27) from becoming a bypass passage. (28) is the blower fan (12)
A cover for supporting the cooling cover (7) (8), which covers the upper surfaces of the coolers (7) (8) as it is installed on the partition plates (24) (25).
(31) Together with (32), the upper surface of the merge area (9A) is closed. The cover (28) has a passage (29) in which the propeller (12A) of the blower fan (12) is installed, and a cold air supply passage (1
3) A ventilation passage (30) oriented in the direction is formed, and the cooler (7) (8) accompanying the upper end of the ventilation passage being in contact with the lower surface of the partition walls (3) (4). The formation of an upper bypass path can be avoided. (33) is a drain outlet formed at the bottom of the bottom wall (2E) of the heat insulating wall (2) so as to be located between the both coolers (7) and (8),
(34) is a drain groove that extends from this drain port toward both the partition plates (24) and (25) in a tapered shape, and is inclined downward from both ends toward the drain port (33) direction. The defrost water from the vessels (7) and (8) is guided to the drain groove (34) and drained to the outside through the drain port (33).

(35) is an antifreezing heater arranged along the drainage groove (32), which is a sheathed heater similar to the defrosting heaters (10) and (11), and both ends thereof are curved. Board (24) (25)
The curved portions (36) and (36) are projected in the lateral direction to heat the gaps (26) and (27) at substantially the center thereof. The antifreezing heater (35) is energized in synchronization with the defrosting heaters (10) and (11). In order to arrange the curved portions (36) (36) in the gaps (26) (27), the notches (37) are formed in the partition plates (24) (25).
The closing plate (38) for preventing the freezing prevention heater (35) from moving in the left-right direction due to thermal expansion and contraction along with closing both notches. Board (2
4) Screws (39) are fastened detachably to (25).

(40) Metal rectangular tube-shaped columns that are erected at the center and the left and right ends of the bottom wall (2E) of the heat insulating wall (2) in the longitudinal direction, and the partition walls (3) (4) By mounting the side walls (3A) and (4A) that face each other, the pillar (40) is located in the supply path (13). If the temperature of the low temperature showcase (1) is short, the stanchions (40) may be two at the left and right ends, but the low temperature showcase
The length of (1) becomes longer, and as shown by the chain line in Fig. 6, a shelf (4
When 1) is installed, the load of the shelf (41) and the product is the pillar (40).
It is preferable to provide three at the center and at the left and right ends in consideration of the relationship added to.

(42) (42) are side walls (3A) (4) facing each other of the partition walls (3) (4)
A protruding portion formed in the longitudinal direction along the upper edge of (A), and bending the upper edges of the both side walls (3A) (4A) at right angles to the corresponding storage chambers (5) (6). The lower wall (43) (43) formed by the above, the hanging wall (44) (44) formed by bending a part of this lower wall at a right angle, and a part of this hanging wall. The upper wall (45) (45) is formed by bending the supply path (13) at a right angle so that its tip is separated from each of the columns (40). At, recesses (46) (46) are formed to partially widen the width of the supply passage (13). (47) is each of the columns
(40) is a straightening plate with both ends arranged in the recesses (46) (46) so as to be located between (40), with a large number of through holes (48), and a center for improving dew treatment during defrosting. Is low.
This straightening vane (47) not only increases the pressure of the cool air toward the outlets (14) and (15) but also makes the pressure uniform. (49) (49) is a plate-shaped support member placed on the upper wall (45) (45) of both the overhanging portions (42) (42), respectively, the portion facing each of the columns (40) Is cut out to form the introduction passages (50) (50), and the cold air flowing from the supply passage (13) to the recesses (46) (46) as indicated by the arrows in FIGS. 1 and 2 is introduced into the introduction passages (50) (50). It guides to the both outlets (14) and (15) through 50 (50). The supporting members (49) and (49) are for mounting a rectifying member and a lattice member which will be described later, but as shown in FIG. 4, the both overhanging portions (42) and (42) may also serve as supporting members. . In this case, the portions of the two overhanging portions (42) (42) facing the columns (40) are used as the introduction paths (50) (50).

Reference numeral (51) is a reinforcing member attached to each of the columns (40), and forms the air outlets (14) and (15) between the supporting members (49) and (49). An article placing plate (53) having price rails (52) (52) for holding price cards is attached to the reinforcing member (51) along the front and rear surfaces. The air outlets (14) and (15) have a rectifying member (54) (5) made of a honeycomb material having a large number of rectifying paths.
4) and the resin lattice members (55) (55) located closer to the storage chambers (5) (6) than the rectifying member are arranged. The lattice members (55) (55) are arranged over the entire width of the air outlets (14) (15), and the flow regulating members (54) (54) are positioned so that they are located between the columns (40). Due to the fact that they are arranged in (14) and (15), as shown in FIG. 1 and FIG. 2, there is a recess (46) (from the portion of both outlets (14) and (15) facing each strut (40). 46), introduction route (5
The cold air that has passed through 0) (50) and the lattice members (55) (55) is blown out to the upper surface opening, while the rectifying member (54) is discharged from most of both outlets (14) and (15) as shown in FIG. (54), the cold air that has passed through the lattice members (55) and (55) is blown out to the upper opening. In addition, (5
Reference numeral 6) is an L-shaped flow distribution plate that divides the supplied cool air in the front-rear direction at the upper end of the supply passage (13), and the elastic force of one of the rectification members (54) (54) serves to rectify the rectification member and the reinforcement member. It is held between (51).

According to such a configuration, each strut (40) of both lattice members (55) (55)
Since the cold air of the supply path (13) is introduced through the recesses (46) (46) and the introduction paths (50) (50) to the portion opposite to,
Cold air will be blown out over the entire width of both outlets (14) (15). Therefore, the so-called non-cooled area is not formed in the upper surface opening even if the pillar (40) is erected in the supply path (13), and the air curtains (A1) (A2) are cooled by the cool air over the entire width of the upper surface opening. Can be formed.

(G) Effect of the Invention According to the present invention described above, since the cold air of the supply passage is introduced through the recess and the introduction passage to the portion of each lattice member facing each strut, the total width of both outlets. As a result, cold air is blown out, and as a result, it is possible to eliminate the non-cooled area of the upper surface opening due to the columns, form an air curtain with good laminar flow characteristics, and improve the cooling effect of the storage chamber.

[Brief description of drawings]

Each of the drawings shows an embodiment of the low temperature showcase of the present invention,
1 is a sectional view taken along the line AA of FIG. 5, FIG. 2 is a sectional view taken along the line BB of FIG. 1, FIG. 3 is an enlarged view of FIG. 6C, and FIG. 4 is another sectional view corresponding to FIG. FIG. 5 is an overall perspective view, FIG. 6 is a sectional view taken along the line DD of FIG. 5, FIG. 7 is a transverse sectional view showing a cooling chamber, and FIG. FIG. (2) …… Insulation wall, (3) (4) …… Compartment wall, (3A) (4A) …… Sidewall, (5) (6) …… Storage room, (13) …… Supply channel, (14 ) (15) ……
Outlet, (40) …… Stut, (42) (42) …… Overhanging part, (46) (46)
…… Recess, (50) (50) …… Introduction path, (54) (54) …… Rectifying member, (55) …… Lattice member.

Claims (1)

[Claims] 1. A heat-insulating wall having an open top surface, two partition walls which are spaced apart from each other in a space surrounded by the heat-insulating wall and each form a storage chamber, and between these partition walls. The cooling air supply path is provided so as to be positioned between at least two columns that are erected separately from each other and to which opposite side walls of the partition walls are attached, and both left and right side walls of the heat insulating wall. Two elongated air outlets formed in the upper part of the passage for blowing out cool air in both front and rear directions, rectifying members respectively arranged at both the air outlets so as to be located between the columns, and outside the rectifying member. Lattice members that are arranged over the entire width of both of the outlets and that form a gap serving as a cool air flow path between a portion facing the pillar and the upper edges of both side walls of the partition walls facing each other toward the storage chamber. Bend the bottom wall, and bend the tip of this bottom wall upward A hanging wall and an upper wall in which a tip of the hanging wall is bent toward the supply path side, each of which has an overhanging portion projecting toward the storage chamber, and a width of the supply path formed by the overhanging portion partially. Low temperature showcase, which is formed between a recess that widens to the front and a portion of the lattice member that faces the column and that introduces cool air in the recess to the space between the lattice member and the column. .