JPS6115494Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved configuration of a prefabricated refrigerator, and in particular, a cooling unit is disposed on the ceiling wall so as to protrude upward.

Conventional prefabricated refrigerators have a cooling unit that protrudes upward from the ceiling wall in order to increase the storage capacity. Condensation occurred at the contact area between the wall and the exterior body due to heat leakage or heat conduction, and dew condensed near the outer periphery of the exterior body and accumulated on the upper surface of the ceiling wall. Dew water that has accumulated on the upper surface of the ceiling wall does not flow down easily, which is undesirable because it corrodes the outer panel of the ceiling wall and causes the breeding of pests and bacteria. Particularly during continuous operation, the dew water accumulated on the upper surface of the ceiling wall cannot be completely evaporated naturally and increases, making the above-mentioned drawbacks more serious.

This proposal was made in consideration of these points, and the figures will be explained below.

Reference numeral 1 denotes a prefabricated refrigerator body whose interior is made up of a ceiling wall 2, a peripheral wall 3, a bottom wall 4, etc. and serves as a storage chamber 5, and has an outer panel 6, an inner panel 7, and heat insulation filled between the double-sided panels 6 and 7. A cooling unit 9 for cooling the inside of the storage room 5 to a predetermined temperature is mounted on the ceiling wall 2, which is formed by combining one or more heat insulating panels 2A made of material 8 or the like, and protrudes upward. It is set up. This cooling unit 9 has a box-shaped exterior body 10 that is open at the bottom and covers the periphery of a vent hole 11 formed in the ceiling wall 2 so as to close the vent hole 11, and is also formed inside the exterior body 10. In the cooling chamber 12, a cooler 13 for cooling the storage chamber 5 through the vent 11 and a blower 14 for forced cooling circulation are disposed. On the upper surface of the ceiling wall 2, a refrigerant compressor 15 and a condenser 16, which form a refrigerant cycle with the cooler 13, are mounted outside the cooling unit 9. The exterior body 10A, the exterior plate 1
0B and these side plates 10A, 10B are formed by a heat insulating wall body such as filling a heat insulating material 10C between them, and the opening end surface thereof is covered with a protective frame 17 made of a metal plate or a synthetic resin material. Moreover, it is airtightly mounted on the peripheral outer surface plate 6 of the vent 11 of the ceiling wall 2 via a sealing material 18 or the like. The protective frame 17 has an outer peripheral edge protruding in a step from the end face of the exterior body 10 toward the ceiling wall 2 side to form a ring-shaped protrusion 17A. A hollow chamber 20 is formed in which a heat dissipation pipe 19 for refrigerant circulation is arranged. Therefore, the sealing material 18 is disposed on the inner peripheral side of the annular protrusion 17A to maintain airtightness between the exterior body 10 and the ceiling wall 2. The heat dissipation pipe 19 heats the contact portion between the exterior body 10 and the ceiling wall 2, such as the top plate 6 of the ceiling wall 2 that comes into contact with the outer peripheral edge of the protective frame 17 and the annular protrusion 17A, thereby preventing dew condensation and frost formation. do. The protective frame 17 is removably attached to the exterior body 10 with screws 21 and the like. Reference numeral 22 denotes a partition plate disposed above the vent 11 on the peripheral wall and chamber in the exterior body 10, and includes a dew receiving portion 22A that receives dew water from the cooler 13, and an outlet that forms a mouth ring of the blower 14. An outlet 22B and a suction port 22C for sucking the return cold air from the storage chamber 5 and circulating it to the cooler 13 are formed.

Since this project is constructed as described above, even if dew condenses on the joint surface between the exterior body and the ceiling wall, it will evaporate due to the heating of the heat sink, preventing dew water from accumulating on the ceiling wall for a long period of time, and preventing frost formation. There will be nothing to do. Moreover, since the cooling unit has an annular protrusion formed around the opening of the exterior body, the hollow chamber formed by the opening circumferential surface of the exterior body and the annular protrusion can be used for the piping part of the heat dissipation tube, making piping work easier. In addition, this annular protrusion comes into contact with the ceiling wall directly or through the box piece seal, so that the cooling unit does not apply multiple layers only to the sealing material disposed on the inner circumferential side. Therefore, even if the sealing material is soft, it is less likely to be crushed and lose its airtight effect due to long-term use.
The airtightness effect is improved and the range of material selection for the sealing material is expanded. Furthermore, since a heat dissipation tube is used for circulating high temperature refrigerant in the refrigerant cycle, there is no power consumption for the heat source, and the heat dissipation effect is promoted, allowing the condenser to be made smaller. Furthermore, since the protective frame is removable from the exterior body, even if any of the heat dissipation tubes or the exterior body are damaged, they can be repaired and replaced individually without having to replace the whole thing, which improves maintenance management.

[Brief explanation of the drawing]

FIG. 1 is a front view of the prefabricated refrigerator of the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, and FIG. 3 is an enlarged view of circle B in FIG. 10... Exterior body, 17... Protection frame, 17A...
Annular protrusion, 19... Heat dissipation pipe, 20... Hollow chamber.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A cooling unit for cooling a storage chamber formed on a ceiling wall, a peripheral wall, a bottom wall, etc. is mounted on the ceiling wall so as to protrude upward, and The outer periphery of the cooling unit is connected to the storage room through a ventilation hole, and forms a cooling room in which a cooler, a blower, etc. are installed. A protective frame having a protruding annular protrusion is installed, a heat dissipation tube for circulating high temperature refrigerant is arranged in the hollow chamber formed by the annular protrusion, and an exterior is provided on the inner peripheral side of the annular protrusion. A prefabricated refrigerator characterized by a sealing material installed between the body and the ceiling wall. 2. The prefabricated refrigerator according to claim 1, wherein a protective frame formed of a metal plate is removably attached to the periphery of the opening of the exterior body of the cooling unit.