JPH10100656A - Refrigerating system for transport - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform inspection and maintenance from an inspection window in a short time by installing a reinforcing plate in an endless belt inserting window of a compressor support housing so as to be freely mountable- demountable to block up a space of an endless belt in a system to drive a compressor by an engine through the endless belt. SOLUTION: In a condensing unit 1 in an overland transport refrigerating system, an engine 5, a compressor 6, an electric motor 7, a cooling fan 10, an alternator 17 and a fan motor 18 are mounted in a casing 2, and a centrifugal clutch 11 and a compressor pulley 19 are housed in a compressor support housing 13. In this case, an inspection window 20 is opened in the compressor support housing 13. Therefore, replacing work of a belt 110 and inspection and maintenance of the centrigugal clutch 11 and the compressor pulley 19 are facilitated. A reinforcing plate 21 is installed so as to block up a part except for an inserting part of the belt 110 among the inspection window 20, and sufficient rigidity and strength to support the compressor 6 on the engine 5 side can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration unit for transportation, and more particularly to a condensing unit in a refrigeration unit for land transportation.

[0002]

2. Description of the Related Art A refrigeration system for land transportation (hereinafter, abbreviated as a refrigeration system) is mainly installed on a truck, and performs cooling operation,
By performing a heating operation or the like, the internal temperature of the freezer mounted on the truck is maintained at a predetermined temperature.

FIGS. 3, 4, 5 and 6 show an example of such a refrigerating apparatus. FIG.
FIG. 5 is a rear view of the vehicle showing an installation state of the condensing unit, FIG. 5 is a plan view schematically showing components of the condensing unit and an arrangement state thereof, and FIG. 6 is a side view of a compressor support housing.

[0004] In FIG. 3, the refrigerating apparatus includes a freezer 1.
Condensing unit 1 installed at the lower part of the outside of 00
And the evaporator 30 installed in the freezer 100 is connected by a refrigerant pipe 40. As shown in FIG. 4, the condensing unit 1 (width L) has a front surface 1 a of the condensing unit 1 which is fastened by bolts via a bracket 102 to a horizontal surface 101 attached to a lower portion of a freezer 100. Side 100a of freezer 100
It is suspended so that it does not protrude outward. Also,
The freezer 100 is fixedly mounted on two chassis channels 103 of a truck located at a position A from the side surface 100a.

In FIG. 5, the condensing unit 1 includes an engine 5, a compressor 6 driven by the engine 5, an electric motor 7 for driving the compressor 6 by a commercial power supply, and a radiator 9 in a casing 2 thereof. It comprises a cooling fan 10 for introducing outside air to cool the engine cooling water in the radiator 9, an alternator 17 driven by the electric motor 7 to generate electric power, and a fan motor 18 for cooling the refrigerant in the condenser 8.

During operation, outside air is introduced from the casing 2a, cools the condenser 8 and the radiator 9, and is discharged to the outside. The power of the engine 5 is transmitted to the compressor 6 via a centrifugal clutch 11 attached to the tip of the drive shaft, and also rotates the cooling fan 10 and the alternator 17 and the fan motor 18.

While the vehicle is running, the engine 5 is used. As the number of revolutions of the engine 5 increases, the centrifugal clutch 11 is connected, and the compressor 6, the cooling fan 10, the alternator 17, and the fan motor 18 Is driven. On the other hand, when the commercial power supply can be used while the vehicle is stopped, the electric motor 7 is used, and the compressor 6, the alternator 17, and the fan motor 18 are driven by the electric motor 7. At this time, the centrifugal clutch 11 is in the disconnected state, and the power of the electric motor 7 is not transmitted to the engine 5.

When the compressor 6 is driven by the engine 5 or the electric motor 7 as described above, the compressor 6
The high-pressure, high-temperature gaseous refrigerant compressed in the above is sent to the condenser 8, where it is cooled by the outside air introduced by the fan motor 18 and condensed and liquefied. The liquid refrigerant is sent to the evaporator unit 30 (see FIG. 3) via the refrigerant pipe 40 (see FIG. 3), where it cools the air in the freezer 100 and evaporates. This gas refrigerant returns to the compressor 6 via the refrigerant pipe 40 and is compressed.

On the other hand, the cooling fan 10 and the fan motor 18
Is driven, the outside air is introduced into the casing 2 through the suction port 2a, flows through the condenser 8 and the radiator 9, and the high-pressure, high-temperature gas refrigerant discharged from the compressor 6 by the condenser 8 is discharged. While cooling, the cooling water of the engine 5 is cooled by the radiator 9 and discharged to the outside.

[0010]

FIG. 6 is a side view of the compressor support housing 13 for coaxially mounting the compressor 6 on the engine 5 shown in FIG. 5 (a view as seen from the arrow B in FIG. 5). It is shown. As shown in FIGS. 6 and 5, a compressor pulley 19 connected to the centrifugal clutch 11 and the electric motor 7 via a belt 110 is built in the compressor housing 13.

When the belt 110 is damaged and replaced, the operator inserts his hand through an inspection window 20 opened in the housing 13 to separate the centrifugal clutch 11 and the compressor pulley 19 and remove the belt 110. Or it needs to be inserted. Therefore, the inspection window 20 needs to be enlarged in order to maintain good maintainability. However, since the compressor support housing 13 needs to have sufficient strength to hold the compressor 6, the inspection window 20 is required.
Cannot be larger than a certain value. For this reason, there is a problem that the replacement work of the belt 110 cannot be easily performed, and that it takes much time.

SUMMARY OF THE INVENTION An object of the present invention is to maintain and maintain a sufficient rigidity and strength of a compressor support housing, and to easily and quickly perform inspection and maintenance such as belt replacement work through an inspection window. An object of the present invention is to provide a refrigeration system for land transportation with improved performance.

[0013]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The gist of the present invention is to mount a compressor on an engine via a compressor support housing and to install the compressor in the compressor support housing. , For transport comprising a centrifugal clutch interposed between the engine and the drive system of the compressor, and a compressor driving pulley coupled to the centrifugal clutch and on which an endless belt from an electric motor is hung. In the refrigerating apparatus, a reinforcing plate is detachably attached to the endless belt insertion window of the compressor support housing so as to close a gap between the endless belts.

In the above means, it is preferable that one set of the window and one set of the reinforcing plate are provided on the opposite side of the compressor supporting housing in the circumferential direction.

According to the above means, since the inspection window having a large opening for facilitating the belt replacement operation from the outside is provided in the compressor support housing, if the reinforcing plate is removed when the belt is damaged, it becomes large. Belt replacement, inspection, and maintenance can be performed easily and in a short time from the opened inspection window.

On the other hand, when the reinforcing plate is securely fastened to the compressor support housing with bolts or the like except during the belt replacement, inspection, and maintenance, the reinforcing plate can sufficiently support the compressor on the engine side. And the rigidity of the compressor support housing is not reduced.

Further, if the windows and reinforcing plates are provided at two places in the circumferential direction, additional maintenance such as retightening of the bolts of the compressor pulley and the centrifugal clutch other than the belt replacement can be easily performed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a side view of a compressor supporting housing portion of a land-based refrigeration transporting apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

The present invention relates to an improvement of the compressor support housing 13 of the land transportation refrigeration system shown in FIG.
Structures other than the compressor support housing are the same as those in FIG.

In FIG. 5, reference numeral 1 denotes a condensing unit. The condensing unit 1 has an engine 5, a compressor 6 driven by the engine 5, and the compressor 6 driven by a commercial power supply in a casing 2 thereof. Electric motor 7, a cooling fan 10 for introducing outside air to the radiator 9 and cooling engine cooling water in the radiator 9, an alternator 17 driven by the electric motor 7 to generate electric power, and a fan for cooling the refrigerant in the condenser 8. It is composed of a motor 18.

During operation, outside air is introduced from the casing 2a, cools the condenser 8 and the radiator 9, and is discharged to the outside. The power of the engine 5 is transmitted to the compressor 6 via a centrifugal clutch 11 attached to the tip of the drive shaft, and rotates the cooling fan 10 and the alternator 17 and also rotates the fan motor 18.

1 to 2 and 5, reference numeral 13 denotes a compressor support housing. Inside the housing 13, the centrifugal clutch 11 connected to the engine 5 and the electric motor 7 are connected via a belt 110. The stored compressor pulley 19 is housed.

Reference numeral 20 denotes an inspection window opened in the compressor support housing 13. The inspection window 20 has a sufficiently large opening through which the belt 110 (see FIG. 5) can be easily replaced and the centrifugal clutch 11 and the compressor pulley 19 can be inspected and maintained.

Reference numeral 21 denotes a reinforcing plate which covers the inspection window 20 except for the portion through which the belt 110 is inserted (FIG. 1).
As shown in FIG.
It is preferable that the opening is inserted so that most of the center is closed.) The outer periphery (in the example of FIG. 1, both axial sides) is fixed to the compressor support housing 13 by a plurality of bolts 22. I have.

In the transport refrigeration system constructed as described above, when the belt 110 is damaged, the bolts 22 are loosened and the reinforcing plate 21 is removed from the housing 13 so that the belt 110 can be removed from the large opening inspection window 20. The replacement operation can be performed easily and in a short time. Also, the centrifugal clutch 11 and the compressor pulley 19 can be inspected from the inspection window 20 and bolts can be retightened.

After the belt replacement as described above, the belt 110 is stretched, and a plurality of reinforcing plates 21 (6 in this example).
The compressor support housing 1 is firmly secured by the bolts 22).
Tighten to 3. The reinforcing plate 21 provides sufficient rigidity and strength for supporting the compressor 6 on the engine 5 side, and there is no reduction in rigidity of the compressor support housing 13 due to the large opening of the inspection window 20.

In FIG. 2, reinforcing plates 21 for covering the inspection window 20 and portions other than the insertion portion of the belt 110 are provided at two locations on the opposite side in the circumferential direction. In this case, the centrifugal clutch 11
Inspection and maintenance such as retightening of the bolts of the compressor pulley 19 can be performed much more easily than the single inspection window 20 as shown in FIG.

[0028]

The present invention is configured as described above.
According to the present invention, when the belt is replaced, if the reinforcing plate is removed from the compressor support housing, the belt replacement operation can be performed very easily and in a short time from the inspection window that is largely opened.

At the time other than the above-mentioned operation, if the portion other than the belt insertion opening of the inspection window is covered with a reinforcing plate and the periphery of the reinforcing plate is firmly fixed to the housing, the reinforcing plate is sufficient. Rigidity and strength can be obtained. This makes it possible to easily and quickly replace the belt without reducing the rigidity and strength of the compressor support housing.

According to the second aspect of the present invention, the opening of the inspection window can be made larger, so that not only the belt replacement but also maintenance such as retightening of bolts of the centrifugal clutch, the compressor pulley, and the like is extremely performed. Can be easily enforced.

[Brief description of the drawings]

FIG. 1 is a side view of a compressor support housing of a refrigeration unit for land transportation according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing the entire configuration of a refrigeration unit for land transportation.

FIG. 4 is a rear view of the refrigeration apparatus.

FIG. 5 is a layout diagram of a condensing unit of the refrigeration apparatus.

FIG. 6 is a side view of a conventional compressor support housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Condensing unit 5 Engine 6 Compressor 7 Electric motor 11 Centrifugal clutch 13 Compressor support housing 19 Compressor pulley 20 Inspection window 21 Reinforcement plate

Claims (2)

[Claims] A compressor is mounted on an engine via a compressor support housing, and a centrifugal clutch interposed between the engine and a drive system of the compressor in the compressor support housing. In a transport refrigeration system comprising a compressor driving pulley coupled with a centrifugal clutch and an endless belt from an electric motor is provided, the endless belt insertion window of the compressor support housing is provided with the endless belt. A refrigerating device for transportation, wherein a reinforcing plate is detachably attached so as to close the gap. 2. The transport refrigeration system according to claim 1, wherein one set of each of the window and the reinforcing plate is provided on a circumferentially opposite side of the compressor support housing.