JPH0614883U - Drain discharge device of refrigeration unit - Google Patents

Abstract

(57) [Summary] [Purpose] Drain generated in the evaporator 10 is dropped on the drain pan 22 and is blocked in the process of passing through the drain hose to freeze the drain hose. [Structure] A drain passage 50 is formed in a heat insulating wall 41 that partitions the evaporator section 15 and the condenser section 42.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drain discharge device such as a refrigeration unit for a container.

[0002]

[Prior art]

 A conventional container is shown in FIG. The container 1 has a rectangular parallelepiped shape, and a refrigeration unit 100 is attached to one end wall 2 of the container 1. By storing the cargo in the container 1 through a door (not shown) provided on the other end wall of the container 1 and operating the refrigeration unit 100, the air temperature inside the container 1 is kept within the range of -30 ° C to + 25 ° C. The container 1 is carried on a ship, truck, railroad vehicle, etc. while being maintained at a temperature arbitrarily set by.

A schematic configuration of the refrigeration unit 100 is shown in FIG. 3, where (A) is a front view, (B) is a cross-sectional view taken along the line BB of (A), and (C) is a rear view. . The gas refrigerant discharged from the compressor 3 enters the water cooling condenser 5 or the air cooling condenser 4 and is condensed and liquefied there. The liquid refrigerant enters the electronic expansion valve 9 via the dryer 7 and the strainer 8 and is throttled there to undergo adiabatic expansion to become a gas-liquid two-phase refrigerant. This refrigerant enters the evaporator 10 and evaporates and evaporates by cooling the inside air that is blown from the evaporator fan 12 driven by the motor 11. Then, this gas refrigerant returns to the compressor 3 via the accumulator 13.

After the air inside the container 1 enters the evaporator section 15 through the suction port 14 and is urged by the evaporator fan 12 as shown by the solid arrow, and is cooled in the process of passing through the evaporator 10. After returning to the inside of the container 1 through the air passage 16 and the blowing chamber 18, the air is blown out from the gaps of the many T-rails 43.

When the air-cooled condenser 4 is used, the motor 17 drives the condenser fan 6. Then, the outside air is heated by exchanging heat with the gas refrigerant in the process of passing through the air-cooled condenser 4, as shown by the broken line arrow, and then is urged and discharged by the condenser fan 6.

When using the water-cooled condenser 5, a water supply valve and a discharge pipe (not shown) are connected to the cooling water inlet 19 and the cooling water outlet 20 to open the water control valve 21. Then, the cooling water supplied from the water supply pipe enters the water cooling condenser 5 from the cooling water inlet 19 through the water pipe (not shown), and is heated there by exchanging heat with the gas refrigerant. It is discharged from the cooling water outlet 20 through the water control valve 21 and the discharge pipe.

The drain condensed on the evaporator 10 drops on the drain pan 22 and is discharged from the drain port 24 via the drain hose 23.

Reference numeral 41 denotes a heat insulating wall, which is fastened to the end wall 2 of the container 1 by a flange formed all around the heat insulating wall. A condenser section 42 is formed on the outside of the heat insulating wall 41 in the center of the lower portion thereof.On the inside of the heat insulating wall 41, the evaporator section 15 is formed on the upper side of the condenser section 42, the air passages 16 are formed on both sides, and the air is blown to the lower portion. Each chamber 18 is formed. An evaporator 10, an evaporator fan 12 and the like are installed in the evaporator section 15. A compressor 3, an air-cooled condenser 4, a condenser fan 6 and the like are installed in the condenser section 42.

In addition, 25 is a control box, 26 is a solenoid valve for liquid injection for cooling by injecting a liquid refrigerant into the compressor 3, 27 is a 200V class power plug, 28 is a 400V class power plug, and 29 is a A power transformer, 31 is an intake air temperature sensor for detecting the temperature of the air in the refrigerator that is sucked into the evaporator 10, 30 is an insertion port of a thermometer for checking the temperature sensor 31, and 33 is the air blown out from the evaporator 10. An outlet air temperature sensor for detecting the temperature, 32 is an inlet for a thermometer for checking the temperature sensor 33, 34 is an outlet temperature sensor for detecting the refrigerant outlet temperature of the evaporator 10, 35 is an overheat prevention sensor, 36 Is a discharge pipe temperature sensor for detecting the temperature of the discharge pipe of the compressor 3, 37 is an outside air temperature sensor for detecting the temperature of the outside air flowing into the air-cooling condenser 4, and 38 Is an inspection lid for inspecting the equipment in the evaporator section 15, 39 is a handle used for attaching and detaching the inspection lid 38, and 40 is a ventilation device.

[0010]

[Problems to be solved by the device]

 In the conventional refrigeration unit described above, the drain dropped on the drain pan 22 passes through the drain hose 23 provided in the air passage 16 and is discharged from the drain port 24 opening to the condenser section 42. When the drainage is low, there is a risk that the drain may freeze and block the drain hose 23 as it passes through the drain hose 23.

In order to deal with this, a heater is provided in the drain hose 23, and the heater is energized to heat the drain hose 23 to prevent the freezing of the drain. However, because of the cost of the heater and energization of the heater There is a problem that not only the electric power cost of the refrigeration unit increases, but also the operating air of the refrigeration unit increases because the air in the refrigerator is heated by the heater.

[0012]

[Means for Solving the Problems]

 The present invention has been devised to solve the above-mentioned problems, and its gist is to provide an evaporator section in which an evaporator is installed and a capacitor section in which a capacitor is installed. In the refrigeration unit in which the drainage generated in the evaporator is received by the drain pan provided below it and discharged from the drain pan to the outside through the drain passage, the drainage is formed in the heat insulation wall. This is a drainage device of a refrigeration unit characterized by having a passage.

[0013]

[Action]

 In the present invention, because of the above configuration, the drain generated in the evaporator drops into the drain pan and is discharged to the outside through the drain passage formed in the heat insulating wall.

[0014]

【Example】

 One embodiment of the present invention is shown in FIG. A drain passage 50 is formed in a portion of the heat insulating wall 41 that separates the recess 42 from the air passage 16. The upper end of the drain passage 50 communicates with the drain grooves 22a on both sides of the drain pan 22, and the lower end communicates with the drain port 24 opening to the condenser section 42. The drain passage 50 is formed when the heat insulating wall 41 is formed. Other configurations are similar to those of the conventional one shown in FIGS.

Then, the drain generated in the evaporator 10 drops into the drain pan 22 and enters the drain groove 22 a, from which it is discharged to the outside from the drain port 24 through the drain passage 50.

Thus, since the drain passage 50 is formed in the heat insulating wall 41, the drain passage 50 is thermally insulated by the heat insulating wall 41. Therefore, even if the air inside the refrigerator passing through the air passage 16 is below zero, The drain that passes through 50 does not freeze.

[0017]

[Effect of device]

 In the present invention, since the drain passage is formed in the heat insulating wall, the drain passing through the drain passage is insulated by the heat insulating wall, so that the drain passage is not blocked by icing. Further, since the conventional drain hose and heater are not required, the cost can be reduced and the electric power cost for energizing the heater and the operating cost of the refrigeration unit can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic perspective view of a conventional container.

FIG. 3 shows a schematic configuration of a conventional refrigeration unit, (A)
Is a front view, (B) is a sectional view taken along the line BB of (A), and (C) is a rear view.

FIG. 4 is a cross-sectional view taken along the arrow DD of FIG. 3 (B).

[Explanation of symbols]

 1 Container 41 Heat-insulating wall 15 Evaporator section 10 Evaporator 42 Condenser section 4 Condenser 16 Air passage 22 Drain pan 50 Drain passage

Claims (1)

[Scope of utility model registration request] 1. A heat insulating wall is provided between the evaporator section in which the evaporator is arranged and the condenser section in which the condenser is arranged, and a drain generated by the evaporator is provided below the partition. A drain discharge device for a refrigeration unit, wherein a drain passage is formed in the heat insulating wall in a refrigeration unit that is received by a drain pan and discharged from the drain pan through a drain passage to the outside.