JPH0632986U - Front panel mounting structure for container refrigeration unit - Google Patents

Abstract

(57) [Abstract] [Purpose] To prevent the screw 45 made of steel for fixing the aluminum front panel 44 from loosening and the front panel 44 from being corroded by electrolytic corrosion. [Structure] A rubber washer 50 is interposed between a front panel 44 and a screw 45 for fixing the front panel 44.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a front panel mounting structure in a container refrigeration unit.

[0002]

[Prior art]

 A schematic configuration of a conventional container refrigeration unit is shown in FIG. 3, (A) is a front view, (B) is a vertical sectional view taken along the line BB of (A), and (C) is (B). It is a cross-sectional view taken along the line CC of FIG. A refrigeration unit 100 is assembled to one end wall 2 of the container 1, and cargo is stored in the container 1 through a door (not shown) provided on the other end wall. By operating the refrigeration unit 100, the container 1 can be mounted on ships, trucks, railway vehicles, etc. while maintaining the internal air temperature inside the container 1 at a temperature that is set arbitrarily within the range of -25 ℃ to +25 ℃. And carry it.

When the refrigeration unit 100 is in operation, 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. This liquid refrigerant enters the expansion valve 9 via the dryer 7 and strainer 8 and is throttled there to adiabatically expand into a gas-liquid two-phase refrigerant. This refrigerant enters the evaporator 10, where it evaporates by cooling the air in the refrigerator, and then returns to the compressor 3 via the accumulator 13.

Air inside the container 1 enters the evaporator section 15 from the suction port 14 as shown by the solid arrow, is urged by the evaporator fan 12 driven by the motor 11, and flows through the evaporator 10. After being cooled in the process, it returns to the inside of the container 1 through the air passage 16 and the blowing chamber 18, and is blown into the inside of the container through the gaps between the T-shaped ventilation rails 43 laid on the bottom surface thereof.

When the air-cooled condenser 4 is used, the motor 17 drives the condenser fan 6. Then, the outside air is sucked into the condenser section 42 as shown by the broken line arrow, heats up by exchanging heat with the gas refrigerant in the process of passing through the air-cooled condenser 4, and is then urged by the condenser fan 6 to be discharged into the atmosphere. Released inside.

When using the water-cooled condenser 5, a water supply pipe and a drain pipe (not shown) are connected to the inlet fitting 19 and the outlet fitting 20, and the water control valve 21 is opened. Then, the condenser fan 6 is stopped. Then, the cooling water supplied from the water supply pipe enters the water cooling condenser 5 from the inlet fitting 19 through the water pipe (not shown), and is heated there by exchanging heat with the gas refrigerant. It is discharged from the outlet fitting 20 through the valve 21 and the drain 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 an inner and outer partition wall, which is fastened to the end wall 2 of the container 1 by a flange formed on the entire circumference thereof. A condenser section 42 is formed on the outside of the partition wall 41 in the center of the lower portion thereof.On the inside of the partition wall 41, an evaporator section 15 is provided above the condenser section 42, air passages 16 are provided on both sides, and a blowout chamber is provided below. 18 are formed respectively. An evaporator 10, an evaporator fan 12 and the like 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.

An aluminum front panel 44 is provided in front of the air-cooled condenser 4 and the condenser fan 6 to limit the flow path of outside air. This front panel 44 is convenient for holding and inspecting the equipment behind it. Therefore, as shown in FIG. 2, a plurality of steel screws 45 are detachably attached to the inner and outer partition walls 41, the air-cooled condenser 4, and the like.

[0011]

[Problems to be solved by the device]

 In the above conventional structure, the steel washer is interposed between the aluminum front panel 44 and the steel screw 45. The front panel 44 may be corroded by electrolytic corrosion when seawater or seawater is sprinkled.

[0012]

[Means for Solving the Problems]

 The present invention has been proposed to solve the above-mentioned problems, and the gist thereof is to provide a container refrigeration unit to which a front panel made of aluminum is detachably attached and the front panel and the front panel. This is a front panel mounting structure in a container refrigeration unit characterized in that a rubber washer is interposed between the container and a copper screw for fixing the container.

[0013]

[Action]

 Since the present invention has the above-mentioned configuration, the vibration transmission to the screw is prevented or reduced by the rubber washer. Further, when the front panel and the screw get wet, a weak current that tends to flow between them is blocked by the rubber washer.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG. 1, (A) is a perspective view of a refrigerating unit, and (B) is a partial sectional view taken along the line BB of (A). As shown in FIG. 1 (B), a rubber washer 50 is interposed between the steel screw 45 and the aluminum front panel 44.

Reference numeral 51 denotes an aluminum stay provided on the inner and outer partition walls 41, the air-cooling condenser 4 and the like, and an aluminum nut 52 is fixed to the back surface thereof by welding or the like. Other configurations are similar to those of the conventional one shown in FIGS. 2 and 3, and corresponding members are designated by the same reference numerals.

Since the rubber washer 50 is interposed between the steel screw 45 and the aluminum front panel 44, when the screw 45 and the front panel 44 get wet by rainwater or seawater, The weak current that tries to flow between them is blocked by the rubber washer 50, so that the front panel 44 is not corroded by electrolytic corrosion.

Further, even if the refrigeration unit 100 vibrates, the vibration can be prevented or reduced by the rubber washer 50 from being transmitted to the screw 45. It can be prevented.

It is needless to say that the present invention can be applied to the mounting structure of the front panel 46 provided in front of the compressor 3 and the front panel 47 provided in front of the power cables and the plugs 27, 28. .

[0019]

[Effect of device]

 In the present invention, the washer made of rubber interposed between the front panel and the screw for fixing the screw can prevent the screw from loosening due to vibration and can prevent the electrolytic corrosion of the front panel.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a perspective view of a refrigerating unit, and (B) is a partial sectional view taken along the line BB of (A).

FIG. 2 is a perspective view of a conventional refrigeration unit.

FIG. 3 shows a schematic configuration of a conventional refrigeration unit, (A)
Is a front view, (B) is a vertical sectional view taken along the line BB of (A), (C)
FIG. 7B is a transverse sectional view taken along the line CC of FIG.

[Explanation of symbols]

 41 frame 44 front panel 45 screw 50 washer

Claims (1)

[Scope of utility model registration request] 1. A container refrigeration unit having an aluminum front panel removably attached, wherein a rubber washer is interposed between the front panel and a steel screw for fixing the front panel. Front panel mounting structure for container refrigeration unit.