JPH08200928A - Open showcase - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] In defrosting operation, the hot air for defrosting, which still has residual heat after defrosting, circulates like the cooling air during cooling operation, so Eliminate the adverse effects that enhance. [Structure] A part of an air passage 5 formed between an outer box 2 and an inner box 3 of a main body case 1 is formed by a partition plate 51 into a cooling duct 52 and a defrosting duct 53, and the duct 52 is cooled in the center. Bowl 62
The fan 51 is disposed at the inlet 52a. The defrost duct 53 has an inlet 53a opening side by side with the outlet 52a, and an outlet 5a
3b communicates with the inlet side of the cooling duct 52, and a defrosting fan 64 is installed at the outlet 53b. A defrosting heater 63 is arranged in the defrosting duct 53. During the cooling operation, the fan 61, the cooler 62, and the inside of the refrigerator circulate. During the defrosting operation, the air heated by the heater 53a flows from the fan 53 to the cooler 62.
The cooler 62 is defrosted by circulating between
Since it does not flow toward the air outlet 5a, it is possible to prevent adverse effects on the inside 4 and the inside goods.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open showcase that eliminates the adverse effects of hot air for defrosting on the inside of a refrigerator and enables defrosting properly and effectively.

[0002]

2. Description of the Related Art An open showcase shown in FIG. 5 is known. In the figure, a main body case 1 of the open showcase is formed in a U-shaped cross section having an opening on the upper surface, and is composed of an outer box 2 which is a heat insulating wall and an inner box 3 which forms an inside 4 inside. An air passage 5 is formed between the outer box 2 and the inner box 3 with a proper gap. Both ends of this ventilation passage 5 face both ends of the opening 1a and face each other to open to form an outlet 5a and an inlet 5b, and a first fan 61, a cooler 62, and a heater 63 are arranged in the passage. To be done. Reference numeral 7 denotes a base on which the main body case 1 is placed and which accommodates pipes and the like.

[0003] In the open showcase, products are stored and displayed in the interior 4. During the cooling operation, the fan 6
1, the air in the refrigerator is sucked into the ventilation passage 5 from the suction port 56, cooled by the cooler 62 to become cooling air, and the air outlet 5
A cool air curtain is formed in the opening 1a to blow out from the inside a to shut off the inside 4 from the outside air, and a part of the inside air
To cool the commodities in the refrigerator and circulate them again to the ventilation passage 5. In the open showcase, frost is formed on the cooler 62 during the intermittent cooling operation and the cooling capacity is reduced. In order to prevent this, the defrosting operation is periodically performed.

During the defrosting operation, the refrigeration cycle composed of the cooler 62, a compressor (not shown), a condenser, etc. is stopped, the heater 63 is energized, and the fan 61 heats the hot air overheated by the heater 63. Flushes and circulates cooler 62. Frost on the surface of the cooler 62 is removed by the warm air, the open showcase shifts to the cooling operation again, and the cold storage of the inside 4 is efficiently performed.

[0005]

By the way, in the conventional open showcase, during defrosting operation, the cooler 62 is washed away, and warm air having some residual heat still circulates in the inside of the refrigerator 4 and circulates. There was a problem that the temperature of the inside product was raised and sometimes product loss was caused by the temperature rise.

It is an object of the present invention to provide an open showcase in which the warm air for defrosting does not adversely affect the inside of the refrigerator or the products in the refrigerator during the defrosting operation.

[0007]

In order to achieve the above object, according to the present invention, between an outer box and an inner box which form a main body case having a substantially U-shaped cross section having an opening for taking out products on one surface. An open show is formed in which both ends face the opening to form a ventilation passage that forms an inlet and an outlet, and a fan that circulates the air inside the refrigerator and a cooler that cools the inside air are arranged in the ventilation passage. In the case, as a first means,
A ventilation plate between the outer box and the inner box at the bottom of the main body case is divided by a partition plate to form a first duct and a second duct, and the first duct has an inlet and an outlet communicating with the ventilation channel. At the same time, the cooler is provided at the center and the fan is provided at the inlet to form a part of the ventilation passage, and the inlet of the second duct opens parallel to the outlet of the cooling duct toward the ventilation passage. While communicating with each other, an outlet is opened to the inlet side of the cooling duct, a second fan is provided at this outlet, and a defrosting heater is further installed in the second duct.

Alternatively, as a second means, a ventilation plate between the outer box and the inner box at the bottom of the main body case is partitioned by a partition plate to form a first section.
A duct and a second duct are formed, and an inlet and an outlet of the first duct communicate with the front and rear ventilation passages to form a part of the ventilation passage, and the cooler is provided at the center and the fan is provided at the inlet. The second duct is installed so that its inlet is open to the outlet of the first duct and has a reversible rotary fan at the inlet, and the outlet is open to the ventilation passage along with the inlet of the first duct. Further, a defrosting heater is installed between the fan and the cooler in the first duct.

[0009]

The hot air heated by the heater and sent to the cooler by the fan is washed out of the cooler and then removed from the outlet of the first duct for cooling by the second fan for defrosting or the reversible rotating fan. It is led to the inlet of the second duct for frost, reheated by the heater, sent again to the cooler and circulated for defrosting.
Since the hot air does not flow to the outlet and does not circulate in the refrigerator, it is possible to avoid the temperature increase of the defrosting hot air in the refrigerator or in the refrigerator. In the second means, the reversible rotation fan is operated in reverse rotation during defrosting during cooling operation and the second duct for defrosting is also used as part of the ventilation passage to increase the air volume and speed of the cooling air. it can.

[0010]

1 and 2 show a first embodiment as a first means of the present invention, and the same or the same parts as those in FIG. 5 are designated by the same reference numerals. 1 and 2, a part of the ventilation passage 5 of the main body case 1 is at the bottom of the main body case,
A partition plate 51 is provided between the outer box 2 and the inner box 3 to form a cooling duct 52 as a first duct and a defrost duct 53 as a second duct. The cooling duct 52 has an inlet 52a
The outlet 52b communicates with the front and rear ventilation passages 5 to form a part of the ventilation passage 5 in which the cooling air circulates, and the cooler 6
2 is provided at the center of the duct, and the fan 61 is provided at the inlet 52a. The defrosting duct 53 has an inlet 53a that is open to the ventilation passage 5 along with the outlet 52b of the cooling duct 52, the opposite end of the inlet 53a is closed by a blind plate 54, and the outlet 53b is a partition plate 51. It is formed toward the inlet side of 52. A defrosting fan 64 as a second fan is installed at the outlet 53b, and the heater 63 is arranged in the defrosting duct.

In the above construction, in the open showcase, the fan 64 stops operating and the heater 63 is de-energized during cooling operation, as shown in FIG. Then, by operating the fan 61 and the cooler 62, the inside air circulates in the ventilation passage 5 including the cooling duct 52 as shown by the arrow, as in the conventional case, and the inside 4 is cooled and kept cool. Then, during the defrosting operation, as shown in FIG. 2, the fan 61 and the cooler 62 stop operating, the heater 63 is energized, and the fan 64 is energized.
Is driven. The inlet 52a of the cooling duct 52 is the fan 6
Since the blast is prevented by 1, the blast by the fan 64 is heated by the heater 63 and becomes hot air for defrosting, and the defrosting duct 53 and the cooling duct 52 are washed as shown by the arrows to wash and circulate the cooler 62. . The frost formed on the cooler 62 is melted and removed by the heat of the warm air. Further, the warm air flows from the outlet 52b of the cooling duct 52 to the inlet 53 of the defrost duct 53.
Since it does not flow toward the air outlet 5a of the ventilation passage 5 and does not flow toward the air outlet 5a of the ventilation passage 5, it is possible to prevent the temperature increase of the inside 4 and the inside goods by the warm air.

3 and 4 show a second embodiment as a second means of the present invention. In FIGS. 3 and 4, also in this embodiment, part of the ventilation passage 5 is the partition plate 5.
Although the cooling duct 52 and the defrosting duct 55 are formed by 1, the defrosting duct 55 is different from the above-described embodiment as follows. That is, the defrost duct 55 is formed in a direction in which the inlet 55a has an opening in the partition plate 51 and faces the outlet 52b of the cooling duct 52 and is substantially orthogonal thereto, and the outlet 55b is a blind plate (5 in FIG. 1).
4) is not provided, and one end of the defrosting duct 55 is opened as it is toward the ventilation passage 5 along with the inlet 52a of the cooling duct 52. A reversible rotation fan 65 is installed at the inlet 55a, and a heater 63 is arranged between the fan 61 of the cooling duct 52 and the cooler 62.

In the above construction, in the open showcase, during the cooling operation, as shown in FIG. 3, the heater 63 is de-energized and the fan 61, the fan 65 and the cooler 62.
Is operated, and the air in the refrigerator circulates through both the cooling duct 52 and the defrosting duct 55 as shown by the arrow to cool and cool the inside 4 of the refrigerator. In this embodiment, the flow rate of the cooling air circulated by the fan 65 is increased, and the advantage that the cooling air curtain formed in the opening 1a is strengthened is obtained.

However, as shown in FIG. 4, during the defrosting operation, the operation of the cooler 62 is stopped, the heater 63 is energized, the fan 61 is operated, and the fan 65 is reversed from the cooling operation. It is driven by rotation. Fans 61 and 6
The air blown by 5 is heated by the heater 63 to become hot air for defrosting, and flows through the cooling duct 52 and the defrosting duct 55 as shown by the arrows to wash and cool the cooler 62. The cooler 62 is efficiently defrosted by the warm air as in the above-described embodiment. After washing the cooler 62, the warm air is guided from the outlet 52b to the inlet 55a by the fan 65, and also the outlet 55b.
Is guided to the inlet 52a by the fan 61. Therefore, warm air does not flow to the air outlet 5a, and the same effect as that of the above-described embodiment can be obtained in this embodiment.

[0015]

According to the present invention, both ends face the opening and are opened between the outer box and the inner box forming the main body case having a substantially U-shaped cross section having the opening for taking out the product on one surface. In an open showcase in which an air passage that forms an intake port and an air outlet is formed, and in which a fan that circulates the air inside the refrigerator and a cooler that cools the air are arranged,
As a means of forming the first duct and the second duct by partitioning a ventilation path between the outer box and the inner box at the bottom of the main body case with a partition plate, the first duct has an inlet and an outlet for the ventilation. The cooling duct is provided in the center and the fan is arranged at the inlet to form a part of the ventilation passage, and the second duct has the inlet in parallel with the outlet of the first duct. While opening and communicating with the road, the outlet is opened to the inlet side of the first duct, the second fan is provided at this outlet, and a defrosting heater is installed in the defrosting duct.

Alternatively, as a second means, a partition plate is provided between the outer box and the inner box at the bottom of the main body case to form a first duct and a second duct, and the first duct is an inlet and an outlet. Forms a part of the ventilation passage by communicating with the ventilation passages at the front and rear, the cooler is provided in the center, and the fan is installed at the inlet, and the inlet of the second duct faces the outlet of the first duct. And equipped with a reversible rotating fan at this inlet,
Since the outlet is arranged in parallel with the inlet of the first duct toward the ventilation passage, and the defrosting heater is installed between the fan and the cooler in the first duct, the defrosting is performed. Operation defrosting, the cooler is efficiently defrosted by the hot air heated by the heater, and the hot air is prevented from flowing toward the outlet through the ventilation passage. It is possible to exclude the rise of goods and the loss of goods due to the rise in temperature.

[Brief description of drawings]

FIG. 1 is a sectional view of an open showcase showing a first embodiment of the present invention in a cooling operation state.

FIG. 2 is a sectional view of the open showcase shown in FIG. 1 in a defrosting operation state.

FIG. 3 is a sectional view of an open showcase in a cooling operation state showing a second embodiment of the present invention.

FIG. 4 is a sectional view of the open showcase shown in FIG. 2 in a defrosting operation state.

FIG. 5: Cross-sectional view of a conventional open showcase

[Explanation of symbols]

 1 Main Body Case 5 Ventilation Path 52 Cooling Duct 53 Defrost Duct 55 Defrost Duct 61 Fan 62 Cooler 63 Heater 64 Defrost Fan 65 Reversible Rotating Fan

Claims (2)

[Claims] 1. Between an outer box and an inner box, which constitute a main body case having a substantially U-shaped cross section having an opening for taking out a product on one surface, both ends are opened so as to face the opening, and a suction port and an outlet port are formed. In an open showcase in which a ventilation passage is formed, and a fan for circulating the air inside the refrigerator and a cooler for cooling the air are arranged in the ventilation passage, a space between the outer box and the inner box at the bottom of the main body case is provided. The air passage is divided by a partition plate to form a first duct and a second duct, and the first duct has an inlet and an outlet communicating with the air passage, and the cooler is provided at the center and the fan is provided at the inlet. Disposed to form part of the ventilation passage,
The second duct has an inlet communicating with the outlet of the first duct in parallel to the ventilation passage while the outlet has the first duct.
An open showcase characterized in that it is provided on the inlet side of the duct, has a second fan at this outlet, and further has a defrosting heater installed in the second duct. 2. Between an outer box and an inner box forming a main body case having a U-shaped cross section having an opening for taking out a product on one surface, both ends are opened to face the opening, and a suction port and a blow-out port are provided. In an open showcase in which a ventilation passage is formed, and a fan for circulating the air inside the refrigerator and a cooler for cooling the air are arranged in the ventilation passage, a space between the outer box and the inner box at the bottom of the main body case is provided. The ventilation duct is divided by a partition plate to divide the first duct and the second duct.
A duct, wherein the first duct has an inlet and an outlet communicating with the front and rear ventilation passages to form a part of the ventilation passage, and the cooler is provided at the center and the fan is provided at the inlet, The second duct has an inlet opening facing the outlet of the first duct and a reversible rotating fan provided at the inlet, and the outlet of the second duct is open to the ventilation passage along with the inlet of the first duct. An open showcase in which a defrosting heater is installed between the fan and the cooler in one duct.