JPH0628576U - Refrigeration unit for containers - Google Patents

Abstract

(57) [Summary] [Purpose] The electrolytic corrosion of the shell of the water-cooled condenser 5 is reliably prevented, and at the same time, the outside air is allowed to smoothly flow into the air-cooled condenser 4A. [Structure] An insulating plate 50 also serving as a wind guide plate for the air-cooled condenser 4A is interposed between the front panel 44 and the water-cooled condenser 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a refrigeration unit for containers.

[0002]

[Prior art]

 A schematic configuration of a conventional container refrigeration unit is shown in FIG. 2, where (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 heated by exchanging heat with the gas refrigerant in the process of passing through the air-cooled condenser 4, as shown by the dashed arrow, and then is urged by the condenser fan 6 to be discharged into the atmosphere.

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.

A front panel 44 made of aluminum having an outside air intake hole 45 such as a punch metal is provided on the front surface of the condenser section 42, and a motor 17, a condenser fan 6 and two are divided inside thereof. An air-cooled condenser 4A, 4B and a water-cooled condenser 5 having a copper shell are provided.

The air-cooled condensers 4A and 4B are arranged at predetermined intervals in the vertical and horizontal directions, and a wind shield plate 46 is provided between the lower right end of the air-cooled condenser 4A and the upper left end of the air-cooled condenser 4B. There is. The water-cooled condenser 5 and the air-cooled condenser 4A are arranged close to the front panel 44 and adjacent to each other.

When water is condensed on the outer surface of the copper shell due to the use of the water-cooled condenser 5, the outer surface of the shell is prevented from contacting the aluminum front panel 44 to prevent electrolytic corrosion. Insulation tape is attached.

[0013]

[Problems to be solved by the device]

 In the above conventional refrigeration unit, not only is it time-consuming to attach the insulating tape to the shell of the water-cooled condenser 5, but there is a risk that the shell of the water-cooled condenser 5 may be electrolytically corroded due to deterioration of the insulation property and durability of the insulating tape. there were. Further, there is a problem that the outside air taken in through the outside air intake hole 45 of the front panel 44 does not smoothly flow into the air-cooled condenser 4A.

[0014]

[Means for Solving the Problems]

 The present invention has been proposed to solve the above problems, and its gist is to provide an aluminum front panel having a large number of outside air intake holes on the front surface of the capacitor section facing the outside. In a refrigerating unit for a container, which is provided inside the front panel, close to the air cooling capacitor and a water cooling condenser having a copper shell, the air cooling unit is provided between the front panel and the water cooling condenser. The refrigeration unit for containers is characterized by having an insulating plate that also functions as a wind guide plate for the capacitor.

[0015]

[Action]

 In the present invention, the shell of the water-cooled condenser is prevented from coming into contact with the front panel by the insulating plate because of the above structure. In addition, the outside air taken in through the outside air intake hole on the front panel is guided by the insulating plate and smoothly flows into the air-cooled condenser.

[0016]

【Example】

 One embodiment of the present invention is shown in FIG. An insulating plate 50 made of plastic or the like having an L-shaped cross section is interposed between the front panel 44 and the water-cooled condenser 5 so as to smoothly guide the outside air to the air-cooled condenser 4A. The insulating plate 50 may be fixed to either the inner surface of the front panel 44 or the shell of the water-cooled condenser 5. Other configurations are similar to those of the conventional one shown in FIG. 2, and corresponding members are designated by the same reference numerals.

The outside air taken in through the outside air intake hole 45 of the front panel 44 is guided by the insulating plate 50 and smoothly flows into the air-cooled condenser 4A. The shell of the water-cooled condenser 5 is prevented from contacting the front panel 44 by the insulating plate 50.

[0018]

[Effect of device]

 In the present invention, the shell of the water-cooled condenser is prevented from coming into contact with the front panel by the all-edge plate, so that the electrolytic corrosion of the shell of the water-cooled condenser can be surely prevented. Further, the outside air taken in through the outside air intake hole of the front panel is guided by the insulating plate and smoothly flows into the air-cooled condenser, so that the consumption power of the condenser fan can be reduced and the performance of the air-cooled condenser can be improved. The insulating plate has a simple structure, can be manufactured at low cost, can be easily attached, and does not deteriorate the insulating property and the durability.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 shows a schematic configuration of a conventional container refrigeration unit, (A) is a front view, (B) is a vertical sectional view taken along the arrow BB of (A), and (C) is (B). It is a cross-sectional view taken along the line CC in FIG.

[Explanation of symbols]

 42 Condenser section 44 Front panel 45 Outside air intake holes 4A, 4B Air-cooled condenser 5 Water-cooled condenser 50 Insulation plate

Claims (1)

[Scope of utility model registration request] 1. An aluminum front panel having a large number of outside air intake holes is provided on the front side of the condenser section facing the outside, and a water-cooled condenser having an air-cooled condenser and a copper shell close to the front panel is provided inside the front panel. A refrigerating unit for a container, in which a condenser is disposed, wherein an insulating plate also serving as a wind guide plate for the air-cooling condenser is interposed between the front panel and the water-cooling condenser.