JPH10292927A - Method and structure for discharging drain at refrigerating cycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a need to cover a drain piping with a heat insulation material by a method wherein drain generated at the cooling coil of an evaporator is warmed by a piping running from a condenser to an expansion valve and discharged. SOLUTION: Drain generated by the refrigerating coil of an evaporator 4 is received by a pan 8 and the drain is collected at a drain piping 9. By locating a pump 10 in the drain piping 9, one end of the drain piping is introduced to the outer periphery of a piping 11 between a condenser 2 and an expansion valve 3 and a specified length is extended along the outer periphery thereof. The spot forms a heat-exchanger 12 for drain and a drain piping 9 extending through the drain heat-exchanger 12 is led out to the outside of a house. Further, a device to heat the drain piping 9 to a room temperature by using the piping 11 suffices for a heat-exchanger 12 for drain. As noted above, when drain in a drain piping 9 is heated to a room temperature, a difference between the room temperature and an outside air temperature is eliminated and vapor condensation is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain discharge method and a structure thereof in a refrigeration cycle of a cooling device or the like.

[0002]

2. Description of the Related Art As shown in FIG.
The gaseous refrigerant is converted into a high-temperature and high-pressure gas refrigerant by mechanical energy in the compressor 1, and the latent heat of condensation is released from the high-temperature and high-pressure gas refrigerant to the outside by the condenser 2 to become a normal-temperature and high-pressure two-phase refrigerant. . The expansion valve 3 lowers the pressure in order to convert the normal-temperature and high-pressure two-phase refrigerant into a liquid refrigerant that is easily evaporated. Further, an evaporator 4 provided in a room or the like absorbs latent heat of evaporation in the room and turns the refrigerant into a gas. This is repeated to cool the room or the like.

In the evaporator 4, a cooling coil 4a
(See FIG. 3), moisture in the room is condensed and becomes a drain.
In order to constantly discharge this moisture from the evaporator 4, the drain pipe 5 is indispensable to the cooling device. Since the temperature of the cooling coil 4a is low, the temperature of the drain becomes almost the same. It is necessary to keep warm for prevention. Therefore, specifically, as shown in FIG.
Is covered with a heat insulating material 6 such as glass wool to prevent condensation.

[0004]

However, coating the heat insulating material 6 is an extremely time-consuming operation, and in particular, it is almost always the case that these drain pipes 5 are passed behind the ceiling board 7. Therefore, workability is poor. In addition, if the heat insulating material 6 has a crack, dew forms from the crack and penetrates into the glass wool heat insulating material 6 to significantly impair the function as the heat insulating material. Further, when such a situation occurs continuously, dew condensation occurs on the surface of the heat insulating material 6, which becomes water droplets and falls on the ceiling board 7 or the like.
Causes discoloration, deformation, generation of mold, etc.

Accordingly, the present invention is to solve the above-mentioned problems by providing a drain discharge method and a structure thereof which do not require coating of the drain pipe with a heat insulating material.

[0006]

In order to omit the heat retention of the drain pipe, it is sufficient to heat the drain to about room temperature. When looking at the refrigeration cycle, the condenser 2 radiates heat because the outside air or the like is cooled, but in reality, the heat is not completely removed, and the two-phase refrigerant reaching the expansion valve 3 is at room temperature or higher (normally). About 30-50 ° C). Therefore, in the present invention, a drain heat exchanger is installed in a pipe extending from the condenser 2 to the expansion valve 3, and the drain generated by the evaporator 4 is heated here.

More specifically, the invention of claim 1 provides a method of discharging a drain in a refrigeration cycle in which a drain generated in a cooling coil of an evaporator is heated by a pipe from a condenser to an expansion valve and discharged. did.

According to a second aspect of the present invention, as an apparatus of this method, a drain pipe of a drain generated by a cooling coil of an evaporator is connected to a drain heat exchanger provided on an outer periphery of a pipe from a condenser to an expansion valve. The drain heat exchanger is connected, and the drain pipe is further led out to the outside.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The refrigeration cycle is the same as the structure of the above conventional example. The drain generated in the refrigeration coil 4 a of the evaporator 4 is received by the tray 8 and collected in the drain pipe 9. One end of the drain pipe 9 is led to the outer periphery of the pipe 11 between the condenser 2 and the expansion valve 3 with the pump 10 interposed therebetween, and a predetermined length is attached to the outer periphery. The drain pipe 9 passing through the heat exchanger 12 is led out to the outdoors or the like.

The above-mentioned drain heat exchanger 12 may have any structure, and it is sufficient that the drain heat exchanger 12 is heated to room temperature by using the pipe 11. When the drain in the drain pipe 9 is heated to room temperature in this manner, there is no difference from the outside temperature, and no dew condensation occurs.

[0011]

According to the first and second aspects of the present invention,
Since the drainage generated in the evaporator is heated by the piping from the condenser to the expansion valve in the refrigeration cycle, there is no need to cover the drain piping with heat insulation, as in the past. Becomes Therefore, the installation work of the cooling device or the like can be extremely simplified.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a conventional refrigeration cycle.

FIG. 3 is an installation configuration diagram of a conventional refrigerator.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 compressor 2 condenser 3 expansion valve 4 evaporator 8 saucer 9 drain pipe 10 pump 11 pipe 12 heat exchanger

Claims (2)

[Claims] 1. A draining method in a refrigeration cycle, wherein a drain generated in an evaporator in a refrigeration cycle is heated and discharged by a pipe from a condenser to an expansion valve. 2. In a refrigeration cycle, a drain pipe of a drain generated in an evaporator is connected to a drain heat exchanger provided on an outer circumference of a pipe from a condenser to an expansion valve, and the drain heat exchanger is further drained from the drain heat exchanger. A drain discharge structure in a refrigeration cycle, wherein a pipe is led out.