JPH0628592U - Control box for container refrigeration unit - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents rainwater from entering the control box 25 when the cover 51 is opened in the rain. [Structure] At least an upper opening edge of the box body 50 is subjected to curling processing 50A that bends outward. Then, the cover 51 is hinged so as to open upward via a hinge 61 provided on the upper side thereof, and a holder 62 for holding the cover 51 in a substantially horizontal open state is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control box for a container refrigeration unit.

[0002]

[Prior art]

 A schematic structure of a conventional container refrigeration unit is shown in FIG. 3, 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 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 44 formed on the entire circumference thereof. A condenser section 42 is formed on the outside of the partition wall 41 at 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, an air passage 16 is 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.

As shown in FIG. 2, the control box 25 includes a box body 50 and a cover 51 that opens and closes the front opening. The cover 51 is hinged to the box main body 50 by a hinge 52 provided on one side edge thereof, and a butterfly bolt 54, which is engaged with a bracket 53 protruding on the other end edge, is projected on the bolt main body 50. It is fastened to the box body 50 by being screwed into the nut 56 welded to the fastening piece 55.

A control device 58 such as a controller, a recorder, a contactor, and a relay is fixed to a board 57 installed on the box body 50, and a sealing material 59 made of an elastic body is attached to the entire inner surface of the cover 51 to form a box body on the box body 50. The close contact of the opening edges of the 50 prevents water and dust from entering the control box 25. Reference numeral 60 is a glass window provided on the cover 51.

[0012]

[Problems to be solved by the device]

 In the conventional control box 25, the cover 51 is opened every time operation, inspection, maintenance, etc. of the control device 58 installed inside the control box 25 is performed, but when the cover 51 is opened in the rain, the upper surface of the box body 50 is opened. The accumulated rainwater may enter the control box 25 and cause a short circuit accident of the control device 58. In addition, if you forget to close the cover 51, or if you open the cover 51 and perform operations such as operation, inspection, and maintenance of the control device 58, rain will fall into the box body 50 through its front opening. there were.

[0013]

[Means for Solving the Problems]

 The present invention has been proposed to solve the above-mentioned problems, and the gist of the first invention is to provide a container-type refrigerating machine with a water-proof structure that includes a box body and a cover that opens and closes the front opening. In the control box of the unit, the control box of the container refrigeration unit is characterized in that at least the opening edge of the upper part of the box body is curled so as to bend outward.

The gist of the second invention is to provide a control box for a container refrigeration unit having a waterproof structure including a box body and a cover that opens and closes the front opening, and the cover is provided on the upper side of the control box. A control box for a refrigerating unit for containers, characterized in that the box body is hinged upward through a hinge and a holder is provided to hold the cover in a substantially horizontal open state.

[0015]

[Action]

 In the first invention, when the cover is opened in rainy weather, the rainwater staying on the box body is blocked by the curling processing part and does not enter the control box.

In the second aspect, by holding the cover in a substantially horizontal open state, it is possible to prevent rainwater from falling into the control box.

[0017]

【Example】

 One embodiment of the present invention is shown in FIG. As shown in FIG. 1C, at least the upper opening edge of the box body 50 is curled 50A that bends outward.

As shown in FIGS. 1A and 1B, the cover 51 is hinged to the box main body 50 so as to open upward via a hinge 61 provided on the upper side thereof. Then, the butterfly bolt 54 penetrating the bracket 53 projecting downward from the lower side of the cover 51 is screwed into the nut 56 welded to the fastening piece 55 projecting downward from the lower surface of the box body 50 to cover the cover 51. Is fastened to the box body 50.

Between the cover 51 and the box body 50, both ends of a link 62 that bends around the pin 65 are pivotally attached by pins 66 and 67. If the cover 51 is held in a substantially horizontal state shown by a dashed line in the figure by extending the link 62 in a straight line as shown in the figure, it is possible to prevent rain from falling into the control box 25 even in the rain.

Note that, in fine weather, if the wire 63 is laid between the butterfly bolt 54 and the hook 64 planted on the outer surface of the inner / outer partition wall 41 to keep the cover 51 in a substantially vertical state, the control box 25 It is possible to easily operate, inspect, and hold the control device 58 inside. 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.

[0021]

[Effect of device]

 In the first invention, at least the opening edge of the upper part of the box body is curled to bend outward, so that when the cover is opened in the rain, rainwater staying on the upper surface of the box body infiltrates into the control box. Can be prevented by the curling part.

In the second invention, since the cover is hinged to the main body of the box so as to open upward through the hinge provided on the upper side of the cover, the cover is provided even if the butterfly bolt is forgotten to be tightened or the butterfly bolt is loosened. Since it hangs down by its own weight and covers the front opening of the box body, rainwater can be prevented from falling into the control box. Also, since the cover can be held in a substantially horizontal open state, rainwater can be prevented from falling into the control box during rainy weather. As a result, it is possible to prevent rainwater from entering the control box and prevent the control device from causing a short-circuit accident or the like.

[Brief description of drawings]

1 shows a first embodiment of the present invention, (A) is a front view of a control box, (B) is a vertical cross-sectional view of the control box, and (C) is a partially enlarged view of an arrow C of (B). FIG.

FIG. 2 shows an example of a conventional control box,
(A) Front view, (B) is a vertical sectional view taken along the line BB of (A),
(C) is a partial side view taken along the arrow C of (A).

FIG. 3 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]

 25 Control box 50 Box body 51 Cover 61 Hinge 50A Curling part 62 Retainer

Claims (2)

[Scope of utility model registration request] 1. A control box of a container refrigeration unit having a waterproof structure including a box body and a cover for opening and closing a front opening of the box body, wherein at least an upper opening edge of the box body is subjected to curling processing to bend outward. The control box of the refrigeration unit for the characteristic container. 2. A control box of a container refrigeration unit having a waterproof structure, which comprises a box body and a cover for opening and closing a front opening of the box body. In addition, a control box for the refrigeration unit for containers is provided with a holding tool for holding the cover in a substantially horizontal open state.