JPH0610772U - Drain discharge device for container refrigeration unit - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify the drain passage for discharging the drain generated in the evaporator 10 to the outside and to facilitate its cleaning. [Structure] The drain passage is composed of one flexible tube 50, the end portion of the tube 50 is exposed to the outside, the exposed portion is bent, and the tip end is locked to the clamp 52, thereby forming a trap 51. To form.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drain discharge device for 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. Then, return to the container 1 through the air passage 16 and the blowing chamber 18.

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 drainage condensed on the evaporator 10 drops on the drain pan 22, passes through the pipe joint 44, the drain pipe 23, and the pipe joint 45, and is discharged from the sealing mechanism 24 called a rubber lip.

The inner and outer partition walls 41 are fastened to the end wall 2 of the container 1 by flanges formed all around the inner and outer partition walls 41. A condenser section 42 is formed on the outside of the inner / outer partition wall 41 in the center of the lower portion thereof.The inner section of the inner / outer partition wall 41 has an evaporator section 15 on the upper side of the condenser section 42, air passages 16 on both sides, and a lower section. Each of the blowout chambers 18 is formed. An evaporator 10, an evaporator fan 12, etc. are installed in the evaporator section 15. Inside the condenser section 42, a compressor 3, an air-cooling condenser 4, a condenser fan 6 and the like are installed.

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 container refrigeration unit described above, when the air inside the container is cooled during the refrigeration operation, the volume of the air inside the container becomes smaller and the pressure of the air inside the container drops below atmospheric pressure. And penetrate into the container 1 through. Therefore, in order to cope with this, a sealing mechanism 43 called a rubber lip is provided at the tip of the drain passage to allow the drain to be discharged but to prevent the invasion of outside air. Since the conventional drain passage is composed of the drain pipe 23, the pipe joints 44 and 45, the sealing mechanism 43, etc., if the number of parts is large, the structure is complicated, and the cost and the number of assembling steps are high. Instead, dust was likely to collect in the drain passage, and cleaning it was difficult.

[0011]

[Means for Solving the Problems]

 The present invention was devised to solve the above-mentioned problems, and the gist of the present invention is that the drain dripping from the evaporator that cools the air inside the container at a pressure lower than atmospheric pressure into the drain pan is used inside and outside. In a drain discharge device for a container refrigeration unit that discharges to the outside through a drain passage that penetrates a partition wall, the drain passage is composed of one flexible tube, and the end of this tube is exposed to the outside. A drain discharge device for a container refrigeration unit is characterized in that a trap is formed by bending a part and locking the tip of the part with a clamp.

[0012]

[Action]

 In the present invention, because of the above-mentioned configuration, the drain is discharged to the outside through the flexible tube and the trap formed on the exposed portion thereof, but the outside air is blocked by the drain accumulated in the trap, Never enter the container. Then, when cleaning the flexible tube, remove its tip from the clamp.

[0013]

【Example】

 One embodiment of the present invention is shown in FIG. The drain passage is composed of one flexible tube 50 made of rubber or the like, and its base end is connected to the discharge port 22a of the drain pan 22. Then, the tube 50 passes through the air passage 16 and tightly penetrates a portion of the inner / outer partition wall 41 that divides the air passage 16 and the condenser section 42, and its end is exposed to the outside. After this exposed portion is raised and bent in a loop shape, the tip of the trap is formed by inserting the tip into the clamp 52 from above and locking it, and the tip opening is directed downward. The other structure is the same as the conventional structure shown in FIGS.

Then, the drain generated by the dew condensation on the surface of the evaporator 10 drops into the drain pan 22, enters the tube 50 through the outlet 22a, passes through the tube 50, passes through the trap 51, and then passes through the trap 51. It is discharged from the tip opening to the outside.

Even if the air inside the container is cooled by the operation of the refrigeration unit and the pressure thereof drops below atmospheric pressure, the outside air is blocked by the drain that accumulates in the rising portion of the trap 52, so that the outside air passes through the tube 50. It does not penetrate into the container 1 through it. Further, since the tip opening of the tube 50 is directed downward, dust does not enter through this tip opening.

When the inside of the tube 50 is cleaned, the tip of the tube 50 can be removed from the clip 52 to straighten the tube 50, so that the inside of the tube 50 can be easily cleaned.

[0017]

[Effect of device]

 In the present invention, the drain passage is composed of one flexible tube, the end portion of the tube is exposed to the outside, the exposed portion is curved, and the tip is locked to the clamp, thereby forming a trap. Since the drain is formed, it is discharged to the outside through the flexible tube and the trap, but the outside air is blocked by the drain that remains in the trap and does not enter the container. Then, the drain passage can be cleaned easily and quickly by removing the tip of the flexible tube from the clamp. Thus, the structure is extremely simple and the number of parts and the number of assembling steps are small, so that the cost can be greatly reduced. Also, the drain passage is less likely to be clogged with dust, and the drain passage can be easily cleaned.

[Submission date] August 25, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

[Problems to be solved by the device]

In the above conventional container refrigeration unit, when the air inside the container is cooled during its refrigeration operation, the volume of air inside the container becomes smaller and the pressure of the air inside the container drops below atmospheric pressure, so the outside air is drained. And penetrate into the container 1 through. Therefore, in order to deal with this, a sealing mechanism 24 called a rubber lip is provided at the tip of the drain passage to allow the drain to be discharged but to prevent the invasion of outside air. Further, since the conventional drain passage is composed of the drain pipe 23, the pipe joints 44 and 45, the sealing mechanism 24 and the like, the number of parts is large, the structure is complicated, and the cost and the assembling man-hour are increased, and the drain is not required. Dust was likely to collect in the passage and it was difficult to clean it.

[Brief description of drawings]

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

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

FIG. 3 shows a schematic configuration of a conventional container 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. .

[Explanation of symbols]

 10 Evaporator 22 Drain pan 50 Tube 51 Trap 52 Clamp

Claims (1)

[Scope of utility model registration request] 1. A drain discharge device for a container refrigeration unit, which discharges drain dropped from an evaporator for cooling air inside a container at a pressure lower than atmospheric pressure to a drain pan to the outside through a drain passage penetrating the inner and outer partition walls. The drain passage is composed of one flexible tube, the end portion of the tube is exposed to the outside, the exposed portion is curved, and the tip is locked to the clamp to form a trap. Drain discharge device for container refrigeration unit.