JPH0638020B2 - Frozen case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a freezer showcase provided with two coolers.

(B) Conventional technology In Japanese Utility Model Publication No. 61-36147 (F25D21 / 06), a cooling chamber accommodating a cooler is provided below a food storage chamber formed in the body of a showcase, and air is introduced into the cooling device. A defrosting heater and a cool air circulation blower are arranged on the side, a defrost water drainage channel of the cooler is provided on the air outflow side of the cooler, and the blower is operated even during defrosting, the cooling The structure of a refrigerating showcase is shown in which a deflecting plate for deflecting air to the drainage channel is provided at the upper part of the air outflow side of the container, and the residual water frozen in the drainage channel during the cooling operation is shown. In addition, during the defrosting operation, the air heated by the defrosting heater is deflected and applied from the deflecting plate to melt and drain the residual water.

(C) Problems to be Solved by the Invention According to the above conventional technique, the residual water is removed by the heating action and the evaporation action of the warm air by guiding the warm air from the deflecting plate to the residual water frozen in the drainage channel. Although it can be thawed, in areas where neither warm air heating nor evaporation is applied, the cooling operation is restarted while the residual water that had been frozen due to the rise in the ambient temperature during defrosting is once thawed but not drained. However, there is a problem that the water is frozen again, and the residual water frozen by repeated operations of both cooling and defrosting gradually grows and becomes an ice block, which becomes an obstacle to cold air circulation. In particular, when this ice block is formed in a gap that serves as a pipe line between the tube plate of the cooler and the main body, the U-shaped portion of the refrigerant pipe is deformed or damaged by the pressure of ice, and the frozen state There was a problem that led to machine failure.

(D) Means for Solving the Problems In order to solve the above problems, the present invention relates to the above-mentioned heat insulation wall which is accompanied by disposing a partition wall defining a food storage chamber in the heat insulation wall which constitutes the main body. And a cooling chamber formed between the bottom wall and the partition wall, and two left and right tube plates connected to each other with a pair of partition plates so as to be spaced apart from each other, and two coolers arranged in the cooling chamber. And the left and right gaps formed between the side wall of the heat insulating wall and the tube plates and the partition plates due to the arrangement of the both coolers, and the bottom wall so as to be located between the both coolers. A drainage port formed on the drainage channel, a drainage channel extending from the drainage port in the direction of the partition plates, and both ends of the drainage channel extending along the drainage channel and the drainage port and below the partition plates to the gaps. And a freezing show that is equipped with a freezing prevention heater that is energized during defrosting. Provide the source.

(E) According to the working example, during the defrosting operation, the antifreezing heater (35) heats the drainage port (33) and the drainage groove (34), and the curved portions (36) (36)
Therefore, the partition plates (24) (25) and the gaps (26) (27) are heated. Due to the heating action of this antifreezing heater (35), it separates from the coolers (7) and (8) and drains (33) and drains (3
4) Ice frost that stays in the vicinity and gaps (2) near both partition plates (24) (25)
6) The frost remaining on (27) can be thawed in a short time, that is, within the defrosting operation time.

(F) Example Hereinafter, an example of the present invention will be described with reference to the drawings.
Is a flat open-type freezer showcase with an open top surface. Inside the heat insulation wall (2) that constitutes the main body, two partition walls (3) and (4) with open top surfaces are provided separately from each other. Food storage rooms (5) and (6) are formed by these two partition walls. Between the partition walls (3) (4) and the heat insulating wall (2), there is a cooling chamber (9) accommodating plate fin type coolers (7) (8) spaced apart from each other. It is provided. A defrosting heater (10) (1) consisting of a sheath heater is provided on the air inflow side of both the coolers (7) (8).
1) is provided respectively, and a cool air circulation fan (12) common to both coolers (7) and (8) is provided on the air outflow side. (13)
Is a side wall (3A) (4A) that is close and opposite to the partition walls (3) (4)
Cold air supply paths that are formed between them and that guide the air cooled by the coolers (7) and (8) to the cold air outlets (14) and (15), respectively (16) and (17) are in front of and behind the heat insulation wall (2). It is formed between both side walls (2A) and (2B) and side walls (3B) and (4B) of both partition walls (3) and (4) close to the both side walls (2A) and (2B), respectively, and crosses the top opening. A cool air return path for guiding the return cool air that has passed through the cool air suction ports (18) and (19) to the respective coolers (7) and (8). Supply route
(13), cold air curtains (A1) and (A2) flowing in different directions in the storage chambers (5) and (6) are formed by forced circulation with the cold air return paths (16) and (17) to form both storages. Maintain chambers (5) (6) at freezing temperature. (20) (21) is the side wall (2A) of the heat insulation wall (2)
(2B) Transparent window erected above, (22) and (23) are both partition walls
(3) Side walls (3B) and (4B) of (4) are removable transparent partition plates that stand upright, and the air curtains (A1) and (A2) are formed by both the transparent window and the transparent partition plate. The height is substantially raised to secure a large effective internal volume of both storage chambers (5) and (6), and the see-through effect of both storage chambers (5) and (6) is improved. The defrosting heaters (10) and (11) are energized during defrosting operation, and their lengths are longer than both coolers (7) and (8). Bending said both coolers (7) (8)
The right and left tube plates (7A) (8A) and a large number of plate-shaped fins (7D) (8D) penetrating laterally from these tube plates (7B) (8B)
The U-shaped portions (7C) and (8C) are bent portions (10A) (11A) for heating.

(24) (25) shown in FIGS. 1 and 2 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).

According to such a structure, the air cooled by the coolers (7) and (8), that is, cold air, circulates as shown by the arrows in FIG.
(5) (6) is kept at freezing temperature. At this time, frost is attached to the entire cooler (7) (8), and this frost gradually increases as the refrigeration operation progresses, but during defrosting operation, the surface on the air inlet side of the cooler (7) (8) Is heated by the air heated by the defrosting heaters (10) and (11) provided in the defrosting water, which directly becomes defrosting water in the coolers (7) and (8) and drops on the bottom wall (2E), or Alternatively, the ice frost is completely peeled off and dropped on the one-side bottom wall (2E) and then is unwound and drained from the drainage groove (34) through the drainage port (33) to the outside. In addition, cooler (7) (8)
Frost attached to both tube plates (7A) (8A) and U-shaped parts (7C) (8C) is heated by the bent parts (10A) (11A) of the defrosting heaters (10) (11) To be done. During this defrosting operation, the heater (3
5) not only heats the drainage port (33) and drainage channel (34), but also bends (3)
6) (36) serves to heat both partition plates (24) (25) and both gaps (26) (27). Due to the heating action of the antifreezing heater (35), ice frost that separates from the coolers (7) and (8) and stays near the drainage port (33) and drainage channel (34) and both partition plates (24) (25) The ice frost remaining in the nearby gaps (26) and (27) can be thawed for a short time, that is, within the defrosting operation time. As a result, it is possible to avoid the formation of ice blocks in the gaps (26) and (27) during the freezing operation, and it is possible to effectively utilize the freeze prevention heater (35).

(G) Effect of the Invention According to the present invention described above, during the defrosting operation, the antifreezing heater heats the drainage port and the drainage groove, and also functions to heat both partition plates and both gaps by the bent portions at both ends. The freezing prevention heater heats the ice frost that separates from both coolers and stays near the drain outlet and drain, and the ice frost that stays in the gap near both partition plates for a short time, that is, during the defrosting operation time. As a result, the drainage treatment of the residual water during the defrosting operation becomes good, the formation of ice blocks in the gap during the freezing operation can be avoided, and the antifreezing heater is effectively used. be able to.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention frozen showcase,
FIG. 1 is an overall cross-sectional plan view, FIG. 2 is a longitudinal side view of essential parts, and FIG. 3 is an overall longitudinal side view. (2) …… Insulation wall, (2E) …… Bottom wall, (3) (4) …… Partition wall, (7)
(8) …… cooler, (24) (25) …… divider, (26) (27) …… gap, (33) …… drain, (34) …… drain, (35) …… Antifreeze heater.

Claims (1)

[Claims] 1. A cooling chamber formed between a bottom wall and a partition wall of the heat insulating wall, which is formed by arranging a partition wall defining a food storage chamber in the heat insulating wall constituting the main body, and Both left and right tube plates are connected by a pair of partition plates so that there is a space between them, and there are two coolers arranged in the cooling chamber below the food storage chamber and the arrangement of both coolers. Accordingly, a left and right gap formed between the side wall of the heat insulation wall and the left and right tube plates and both partition plates, and a drain port formed on the bottom wall so as to be located between the both coolers, A drain groove extending from the drain port in the direction of the partition plates and the drain groove and the drain port are arranged so that both ends thereof extend below the partition plates and extend to the gap. Freezing showcase equipped with a freezing prevention heater.