JP2007017016A - Low temperature storage cabinet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost low temperature storage cabinet that minimizes the extension of piping within a drain pan. <P>SOLUTION: The low temperature storage cabinet includes an evaporator 13, a slit 14 provided in the fin of the evaporator, a drain pan 12 for receiving dew condensation water or water resulting from defrosting from the evaporator, and a hot gas duct 15 for guiding defrosting hot gas to the evaporator 13 and the drain pan 12. The slit 14 is provided on the leeward side of the evaporator 13 and the hot gas duct 14 is provided only on the windward side of the evaporator. Frost on the leeward side is melted by the evaporator and frost on the windward side can be melted by the hot gas duct 15 provided inside the drain pan 12. The hot gas duct 15 can be made shorter and less expensive than conventional ones. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooling device for a low temperature storage.

  Conventionally, this type of low-temperature storage is cooled by a cooling device provided in the upper part of a storage room for cooling and storing vegetables and the like. As this kind of cooling device, a cooling system in which an evaporator and the like are integrated is generally known.

  In this type, the means for defrosting the frost on the evaporator differs depending on the cooling temperature. When the cooling temperature is relatively high, the cooling operation of the cooling device is stopped to remove the frost on the evaporator. It can be melted. On the other hand, when the cooling temperature is relatively low, it is necessary to melt the frost or ice that has formed on the evaporator, so that the evaporator is defrosted forcibly.

  Moreover, in order to collect | recover and discharge | emit the frost which flowed out or peeled as drain water, the drain pan etc. which have the discharge port below the evaporator are provided. If the drain water collected in this drain pan is in an ice block state or if the surface temperature of the drain pan is below the freezing point temperature, it becomes difficult for the drain water to freeze and drain into the drain pan. Thawing means are generally provided to thaw the water.

  In order to quickly thaw, the defrosting is forced by passing the high-temperature refrigerant gas through the evaporator directly from the discharge pipe of the compressor through the bypass circuit, and the high-temperature refrigerant gas is routed to the drain pan. The most efficient thawing means is to perform so-called hot gas defrosting that performs defrosting such as ice frozen on the drain pan.

  FIG. 10 is a perspective view of a conventional cooling device for a low-temperature storage described in Patent Document 1, and FIG. 11 is a main part rear view of the drain pan of the conventional cooling device for a low-temperature storage described in Patent Document 1.

  As shown in FIGS. 10 and 11, the cooling device includes an evaporator 1, a drain pan 2, and a hot gas pipe 3 that guides hot gas for defrosting.

  The hot gas pipe 3 is stretched uniformly over the entire bottom surface of the drain pan 2, and the hot gas pipe 3 is pressed by a pressing plate (not shown) and is brought into close contact with the drain pan 2 by welding.

  The material of the holding plate is aluminum, and the material of the drain pan 2 is aluminum.

  The operation | movement is demonstrated below about the low temperature store comprised as mentioned above.

  It is necessary to melt the frost and ice that have formed on the evaporator 1, and the evaporator 1 is defrosted forcibly.

A drain pan 2 having a discharge port is provided below the evaporator in order to collect and discharge the frost that has flowed out or peeled off as drain water, and the drain pan 2 is compressed in order to quickly thaw the drain water collected. The high-temperature refrigerant gas is passed through the evaporator 1 directly from the discharge pipe of the machine through the evaporator 1 to forcibly defrost, and further, the high-temperature refrigerant gas is led to a pipe routed around the drain pan 2 and frozen in the drain pan 2 Remove defrosted ice.
JP-A-8-219599

  However, in the above-described conventional configuration, the hot gas piping for heating the entire drain pan is meandered in order to melt frost and ice at the time of defrosting, and the entire bottom surface of the drain pan is stretched uniformly, and the drain pan is hot. The gas piping is in close contact with the holding plate by welding. In this way, the method of defrosting and guiding the hot gas requires a bypass circuit using a solenoid valve or the like in the cooling system and a hot gas pipe closely attached to a drain pan for guiding the hot gas therefrom, in particular, the hot gas pipe Since the total length of the film becomes long, there is a problem that the cost is remarkably increased.

  The present invention solves the above-described conventional problems, and provides a low-temperature storage that reduces costs and facilitates production by minimizing the routing of hot gas piping in the drain pan while maintaining defrosting performance. The purpose is to do.

  In order to solve the above-described conventional problems, in the low-temperature storage according to the present invention, the hot gas pipe is provided only on the windward side of the evaporator on the inner surface of the drain pan, and the slit is provided on the leeward side of the evaporator. It is a thing.

  This allows the leeward side of the evaporator to hold or contact the frost that has formed on the evaporator and melt the frost by the heat of the hot gas that has flowed to the evaporator during defrosting. On the upper side, because the amount of frost formation is large, the frost falls into the drain pan as a solid, but on the inner surface of the drain pan, the hot gas pipe provided only on the windward side can be melted even if it is a solid frost, The frost that is reliably frosted can be drained out of the cooling device as drain water.

  The low-temperature storage of the present invention can minimize the cost of hot gas piping in the drain pan by providing the evaporator with simple additional processing that is not very costly.

  The invention according to claim 1 is an evaporator having slits in fins, a drain pan disposed at a lower portion of the evaporator that receives condensed water, defrosted water, and the like of the evaporator, and the evaporator and the drain pan. A hot gas pipe that guides the hot gas for defrosting to the inside of the drain pan, the hot gas pipe is provided only on the windward side of the evaporator, and the slit is provided on the leeward side of the evaporator. Thus, on the leeward side of the evaporator, the frost that has formed frost is held in the evaporator by the slit, and the frost can be completely melted by the heat of the hot gas that has flowed to the evaporator during the defrosting.

  Also, the windward side of the evaporator has a large amount of frost formation, so the frost falls into the drain pan as a solid, but even on the inner surface of the drain pan, even if it is a solid frost by hot gas piping provided only on the windward side It can be melted completely, and the frost that has been frosted reliably can be drained out of the cooling device as drain water.

  In addition, since the fins of the evaporator are made by pressing holes through which piping passes, slits can be easily added, hot gas piping in the drain pan can be minimized, and costs can be reduced. .

  In addition, hot gas is usually flowed from the hot gas pipe and led to the evaporator, but the hot gas pipe is also cooled before defrosting. If the hot gas pipe is long, the heat loss due to the heat capacity of the hot gas pipe increases. Since the hot gas piping can be configured to be shorter than the conventional product, the temperature rise of the evaporator becomes faster and defrosting can be performed quickly.

  Invention of Claim 2 is an evaporator, the metal plate provided in the lower side of the evaporator, the drain pan arrange | positioned under the evaporator which receives the dew condensation water, defrost water, etc. of the evaporator A hot gas pipe that guides the defrosting hot gas to the evaporator and the drain pan, and the hot gas pipe is provided only on the windward side of the evaporator on the inner surface of the drain pan. By providing on the leeward side of the evaporator, when the frost formed on the leeward side of the evaporator falls down without melting, the frost is received on the metal plate, and the metal plate comes into contact with the fins of the evaporator. In position, the frost can be melted on the metal plate by the heat of the evaporator with hot gas.

  Also, the windward side of the evaporator has a large amount of frost formation, so the frost falls into the drain pan as a solid, but even on the inner surface of the drain pan, even if it is a solid frost by hot gas piping provided only on the windward side It can be melted completely, and the frost that has been frosted reliably can be drained out of the cooling device as drain water.

  The metal plate can be easily attached with a screw or the like, and can be added at a relatively low cost, so that the hot gas piping in the drain pan can be minimized and the cost can be reduced.

  In addition, hot gas is usually flowed from the hot gas pipe and led to the evaporator, but the hot gas pipe is also cooled before defrosting. If the hot gas pipe is long, the heat loss due to the heat capacity of the hot gas pipe increases. Since the hot gas piping can be configured to be shorter than the conventional product, the temperature rise of the evaporator becomes faster and defrosting can be performed quickly.

  Invention of Claim 3 is arrange | positioned in the lower part of the said evaporator which receives the evaporator, the fin fall part which fell the edge part of the said evaporator in the same direction, and the dew condensation water, defrost water, etc. of the said evaporator The drain pan, and a hot gas pipe that guides the defrosting hot gas to the evaporator and the drain pan, the hot gas pipe being provided only on the windward side of the evaporator on the inner surface of the drain pan, Since the fin fall part is provided on the leeward side of the evaporator, the leeward side of the evaporator receives frost when the frosted frost falls down without being melted, and the frost is evaporated by hot gas. The fin can be melted by the heat of the vessel.

  Also, the windward side of the evaporator has a large amount of frost formation, so the frost falls into the drain pan as a solid, but even on the inner surface of the drain pan, even if it is a solid frost by hot gas piping provided only on the windward side It can be melted completely, and the frost that has been frosted reliably can be drained out of the cooling device as drain water.

  If a fin fall part is a corner part, it can be processed easily, cost can be held down, the drawing of hot gas piping in a drain pan can be minimized, and cost can be held down.

  In addition, hot gas is usually flowed from the hot gas pipe and led to the evaporator, but the hot gas pipe is also cooled before defrosting. If the hot gas pipe is long, the heat loss due to the heat capacity of the hot gas pipe increases. Since the hot gas piping can be configured to be shorter than the conventional product, the temperature rise of the evaporator becomes faster and defrosting can be performed quickly.

  The invention according to claim 4 is an evaporator, a drain pan disposed at a lower part of the evaporator that receives condensed water, defrost water, and the like of the evaporator, and a hot for defrosting the evaporator and the drain pan. A hot gas pipe for guiding gas, and the hot gas pipe is provided only on the windward side of the evaporator on the inner surface of the drain pan, and the drain pan is shallow enough that the leeward side of the evaporator is in contact with the evaporator. Since the leeward side of the evaporator has a deep shape, the frost on the leeward side of the evaporator will be received by the drain pan when it falls down without melting and the drain pan is shallow enough to touch the fins, so the frost is hot gas. The melted drain water falls to the windward side of the evaporator and can promote the melting of frost.

  Also, the windward side of the evaporator has a large amount of frost formation, so the frost falls into the drain pan as a solid, but even on the inner surface of the drain pan, even if it is a solid frost by hot gas piping provided only on the windward side It can be melted completely, and the frost that has been frosted can be drained out of the cooling device as drain water, and if the fin fall part is a corner part, it can be easily processed and the cost can be reduced. It is possible to minimize the routing of the hot gas piping in the drain pan, and to reduce the cost.

  In addition, hot gas is usually flowed from the hot gas pipe and led to the evaporator, but the hot gas pipe is also cooled before defrosting. If the hot gas pipe is long, the heat loss due to the heat capacity of the hot gas pipe increases. Since the hot gas piping can be configured to be shorter than the conventional product, the temperature rise of the evaporator becomes faster and defrosting can be performed quickly.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of the main part of the evaporator part of the low-temperature storage according to Embodiment 1 of the present invention, FIG. 2 is a perspective view of the main part of the evaporator of the low-temperature storage according to the same embodiment, and FIG. FIG. 4 is a characteristic diagram schematically showing the frosting state of the evaporator of the low-temperature storage according to the embodiment.

  In FIG. 1, a heat insulating box 11, a drain pan 12 installed therein, and an evaporator 13 installed on the drain pan, the evaporator 13 is provided with a slit 14, and a hot gas pipe 15 is connected to the drain pan 12. Although the air is drawn into the evaporator 13 by the fan 16, the wind flows in the direction of the arrow in FIG. 1, so that the fan 16 side is leeward and the opposite is the windward. The pipe 15 is provided only on the windward side of the evaporator 13 on the inner surface of the drain pan 12.

  A plurality of slits 14 provided in the evaporator 13 are located on the leeward side of the evaporator 13.

  The hot gas pipe 15 and the evaporator 13 are connected via a branch pipe or the like in order to guide the hot gas to the evaporator 13.

  In FIG. 2, a slit 14 is provided in the evaporator 13 on the leeward side of the evaporator 13. The slit 14 cuts the fin 21 and is parallel to the wind flow.

  In FIG. 3, the low temperature storage 31 is provided with a cooling device 32 at the top, and the heat insulating box 11 in the cooling device 32 is connected to the inside of the storage 31 to circulate cold air.

  FIG. 4 shows the frosting state on the windward and leeward side of the fins 21 of the evaporator 13.

  The operation and action of the low-temperature storage configured as described above will be described below.

  First, as shown in FIG. 4, the frosting state of the evaporator 13 before the defrosting after cooling the low temperature storage 31 is more frosted at the end of the fin 21 on the leeward side, but is almost as it becomes the leeward side. Does not frost.

  Since the leeward side of the fin 21 has a thin frost on the surface, most of the frost melts without being dropped on the drain pan 12 by heating when hot gas flows through the evaporator 13 and becomes drain water.

  On the other hand, since frost is often attached to the end of the fin 21 on the windward side, the frost is solidly dropped on the drain pan 12 by the dead weight of the frost at the initial stage of hot gas flow, and if it is not on the drain pan, the frost can be completely melted. The inventor has confirmed through experiments and the like that this is not possible.

  Therefore, the leeward side of the evaporator 13 can melt the frost formed by the heat of the hot gas flowing to the evaporator 13 at the time of defrosting, but the slight frost falls from the fins. The frost can be completely melted by the heat of the hot gas that is held in the evaporator 13 by the slits 14 and flows to the evaporator 13.

  In addition, since the frost amount on the windward side of the evaporator 13 is large, the frost falls into the drain pan 12 while remaining solid, but the hot gas pipe 15 provided only on the windward side of the drain pan 12 causes the frost to form. The frost that has been frosted can be drained out of the cooling device as drain water.

  As described above, in the present embodiment, the fins 21 of the evaporator 13 are formed by pressing the holes through which the pipes are passed, so that the slits 14 can be easily additionally processed at low cost. The routing of the hot gas pipe 15 can be minimized and the cost can be reduced.

  Further, the hot gas is usually flowed from the hot gas pipe 15 and led to the evaporator 13, but before the defrosting, the hot gas pipe 15 is also cooled, and when the hot gas pipe 15 is long, it is heated by the heat capacity of the hot gas pipe 15. Although the loss increases, the hot gas pipe 15 can be configured to be shorter than that of the conventional product, so that the temperature of the evaporator 13 increases more quickly and defrosting can be performed quickly.

  In addition, since the frost hold | maintained at the slit 14 at the time of defrosting falls to the hot gas piping 15 side by directing the slit 14 provided in the evaporator 13 diagonally downward to the windward side, it can melt | dissolve frost more reliably. it can.

  In the present embodiment, the slits 14 are formed in two rows with respect to the wind flow. However, the slits 14 do not necessarily have to be two rows, and may be one row.

  In this embodiment, the slit 14 is provided only on the leeward side, but may be provided on the leeward side as necessary.

(Embodiment 2)
FIG. 5 is a cross-sectional view of the main part of the evaporator part of the low-temperature storage according to Embodiment 2 of the present invention, and FIG. 6 is a perspective view of the main part of the evaporator of the low-temperature storage according to the same embodiment.

  In FIG. 5, it comprises a heat insulation box 11, a drain pan 12 installed in the inside, and an evaporator 13 installed on the drain pan. A metal plate 51 is provided below the evaporator 13, and a hot gas pipe is provided. 15 is drawn in the drain pan 12, but the wind flows in the direction of the arrow in FIG. 5, so that the fan 16 side is leeward and vice versa, and the hot gas pipe 15 is connected to the evaporator 13 on the inner surface of the drain pan 12. It is provided only on the windward side.

  Further, the metal plate 51 is located below the leeward side of the evaporator 13.

  The hot gas pipe 15 and the evaporator 13 are connected via a branch pipe or the like in order to guide the hot gas to the evaporator 13.

  In FIG. 6, a metal plate 51 is provided on the leeward side of the evaporator 13. The metal plate 51 is disposed below the evaporator 13 so as to contact the fins 21.

  The operation and action of the low-temperature storage configured as described above will be described below.

  First, the frosting state of the evaporator 13 is the same as that of the first embodiment, and the leeward side of the evaporator 13 can melt the frost by the heat of the hot gas flowing to the evaporator 13 at the time of defrosting. However, since slight frost falls from the fins, the frost can be melted by the heat that is held on the metal plate 51 by the metal plate 51 provided at the lower part of the evaporator 13 and transmitted through the fins 21 of the evaporator 13. it can.

  In addition, since the windward side of the evaporator 13 has a large amount of frost formation, the frost falls into the drain pan 12 as a solid. However, the hot gas pipe 15 provided only on the windward side of the drain pan 12 causes the frost to form. The frost that has been frosted can be drained out of the cooling device as drain water.

  As described above, in the present embodiment, the metal plate 51 can be easily attached with screws or the like, can be added at a relatively low cost, and the routing of the hot gas pipe 15 in the drain pan 12 is minimized. Can reduce costs.

  Further, the hot gas is usually flowed from the hot gas pipe 15 and led to the evaporator 13, but before the defrosting, the hot gas pipe 15 is also cooled, and when the hot gas pipe 15 is long, it is heated by the heat capacity of the hot gas pipe 15. Although the loss increases, the hot gas pipe 15 can be configured to be shorter than that of the conventional product, so that the temperature of the evaporator 13 increases more quickly and defrosting can be performed quickly.

  In addition, by integrating the metal plate 51 provided in the evaporator 13 with a duct or the like for fixing the fan 16, the cost can be further reduced without increasing the number of parts.

(Embodiment 3)
FIG. 7 is a cross-sectional view of the main part of the evaporator part of the low-temperature storage according to Embodiment 3 of the present invention, and FIG. 8 is a perspective view of the main part of the evaporator of the low-temperature storage according to the same embodiment.

  In FIG. 7, the heat insulating box 11 includes a drain pan 12 installed therein, and an evaporator 13 installed on the drain pan. The hot gas pipe 15 is routed in the drain pan 12, but since the wind flows in the direction of the arrow in FIG. 7, the fan 16 side is leeward, and vice versa. The hot gas pipe 15 is provided only on the windward side of the evaporator 13 on the inner surface of the drain pan 12.

  In addition, the fin fall portion 71 is located below the leeward side of the evaporator 13.

  The hot gas pipe 15 and the evaporator 13 are connected via a branch pipe or the like in order to guide the hot gas to the evaporator 13.

  In FIG. 8, the fin fall part 71 is provided on the leeward side of the evaporator 13. The fin fall part 51 is fallen so that the adjacent fins 21 of the evaporator 13 may overlap.

  The operation and action of the low-temperature storage configured as described above will be described below.

  First, the frosting state of the evaporator 13 is the same as that of the first embodiment, and the leeward side of the evaporator 13 can melt the frost by the heat of the hot gas flowing to the evaporator 13 at the time of defrosting. However, since a slight amount of frost falls from the fins, the frost is generated by the heat transferred through the fins 21 of the evaporator 13 by being held on the fin-falling parts 71 by the fin-falling parts 71 provided in the lower part of the evaporator 13. Can be melted.

  Further, since the frost amount on the windward side of the evaporator 13 is large, the frost falls into the drain pan 12 while it remains solid. However, the frost that has been frosted can be drained out of the cooling device as drain water.

  As described above, in the present embodiment, if the fin collapse portion is a corner portion, it can be easily processed, so that it can be added at low cost, and the hot gas piping 15 in the drain pan 12 can be routed. It can be minimized and costs can be reduced.

  Further, the hot gas is usually flowed from the hot gas pipe 15 and led to the evaporator 13, but before the defrosting, the hot gas pipe 15 is also cooled, and when the hot gas pipe 15 is long, it is heated by the heat capacity of the hot gas pipe 15. Although the loss increases, the hot gas pipe 15 can be configured to be shorter than that of the conventional product, so that the temperature of the evaporator 13 increases more quickly and defrosting can be performed quickly.

(Embodiment 4)
FIG. 9 shows a cross-sectional view of the main part of the evaporator part of the low-temperature storage according to Embodiment 4 of the present invention.

  In FIG. 9, a heat insulating box 11, an evaporator 13, and a drain pan 91 that receives the evaporator 13 are provided. The arrow in FIG. 9 indicates the direction of the wind, but the drain pan 91 is in contact with the fins 21 of the evaporator 13. Thus, the windward side of the evaporator 13 is deep.

  The hot gas pipe 15 is routed only at a location deeper on the windward side of the evaporator 13 in the drain pan 91.

  The hot gas pipe 15 and the evaporator 13 are connected via a branch pipe or the like in order to guide the hot gas to the evaporator 13.

  The operation and action of the low-temperature storage configured as described above will be described below.

  First, the frosting state of the evaporator 13 is the same as that of the first embodiment, and the leeward side of the evaporator 13 can melt the frost by the heat of the hot gas flowing to the evaporator 13 at the time of defrosting. However, a slight amount of frost falls from the fins, remains on the shallow side of the drain pan 91, and can be melted by the heat transmitted through the fins 21 of the evaporator 13.

  Further, since the windward side of the evaporator 13 has a large amount of frost formation, the frost falls into the drain pan 12 while remaining solid, but even if the frost is solid due to the hot gas pipe 15 provided only on the windward side of the drain pan 12. It can be melted completely, and the frost that has been frosted reliably can be drained out of the cooling device as drain water.

  As described above, in the present embodiment, by providing a step in the shape of the drain pan 91, the routing of the hot gas pipe 15 in the drain pan 91 can be minimized, and the cost can be suppressed.

  Further, the hot gas is usually flowed from the hot gas pipe 15 and led to the evaporator 13, but before the defrosting, the hot gas pipe 15 is also cooled, and when the hot gas pipe 15 is long, it is heated by the heat capacity of the hot gas pipe 15. Although the loss increases, the hot gas pipe 15 can be configured to be shorter than that of the conventional product, so that the temperature of the evaporator 13 increases more quickly and defrosting can be performed quickly.

  Further, when the material of the drain pan 91 is a material that does not transmit heat, such as a resin, a metal plate is provided in a portion that is in close contact with the fin 21 on the lee side of the evaporator 13, thereby improving thermal conductivity and melting frost more reliably. be able to.

  As described above, since the low-temperature storage according to the present invention can simplify the hot gas piping to be short and can perform hot gas defrosting at a low cost, it is off-cycle with a conventional cooling device having a high cooling temperature. Even if the cooling device is configured by a method such as defrosting, hot gas piping can be easily incorporated, so the configuration can be changed for refrigeration with a reduced cooling temperature, and various parts can be changed. Sharing can contribute to cost reduction.

Sectional drawing of the principal part of the evaporator part of the low-temperature storage in Embodiment 1 of this invention The principal part perspective view of the evaporator of the low-temperature storage of the embodiment The perspective view of the low-temperature storage of the same embodiment The characteristic figure which showed the frosting state of the evaporator of the cold storage of the embodiment Sectional drawing of the principal part of the evaporator part of the low-temperature storage in Embodiment 2 of this invention The principal part perspective view of the evaporator of the low-temperature storage of the embodiment Sectional drawing of the principal part of the evaporator part of the low-temperature storage in Embodiment 3 of this invention The principal part perspective view of the evaporator of the low-temperature storage of the embodiment Sectional drawing of the principal part of the evaporator part of the low-temperature storage in Embodiment 4 of this invention A perspective view of a conventional cooling device for a low temperature storage The main part rear view of the drain pan of the cooling device of the conventional low temperature storage

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Heat insulation box 12,91 Drain pan 13 Evaporator 14 Slit 15 Hot gas piping 16 Fan 21 Fin 31 Low temperature storage 32 Cooling device 51 Metal plate 71 Fin fall part

Claims (4)

  An evaporator provided with a slit in the fin, a drain pan disposed in the lower part of the evaporator that receives condensed water, defrost water, and the like of the evaporator, and a hot gas for defrosting is led to the evaporator and the drain pan A hot gas pipe, wherein the hot gas pipe is provided only on the windward side of the evaporator on the inner surface of the drain pan, and the slit is provided on the leeward side of the evaporator. .   An evaporator, a metal plate provided on the lower side of the evaporator, a drain pan disposed in the lower part of the evaporator that receives condensed water, defrosted water, etc. of the evaporator, and the evaporator and the drain pan. A hot gas pipe for guiding hot gas for frost, and the hot gas pipe is provided only on the windward side of the evaporator on the inner surface of the drain pan, and the metal plate is provided on the leeward side of the evaporator. , Characterized by low temperature storage.   An evaporator, a fin tilting section that tilts the end of the evaporator in the same direction, a drain pan disposed under the evaporator that receives condensed water, defrosted water, and the like of the evaporator, the evaporator and A hot gas pipe that guides the defrosting hot gas to the drain pan, the hot gas pipe is provided only on the windward side of the evaporator on the inner surface of the drain pan, A low temperature storage provided on the leeward side.   An evaporator, a drain pan disposed at a lower portion of the evaporator that receives dew condensation water, defrost water, and the like of the evaporator; and a hot gas pipe that guides the defrosting hot gas to the evaporator and the drain pan. The hot gas piping is provided only on the windward side of the evaporator on the inner surface of the drain pan, and the drain pan is shallower so that the leeward side of the evaporator is in contact with the evaporator and the windward side of the evaporator is deeper. , Characterized by low temperature storage.

Images