JPH1024729A - Refrigerating device for transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerating device for transportation which can be mounted at the lower section of a refrigerating vehicle without expanding a depth size of a condensing unit. SOLUTION: A drive shaft of a compressor 6 is arranged on the same axis as the drive shaft of an engine 5, they are connected via a clutch 11, and a double-shaft motor 7 is arranged so that its drive shaft is made perpendicular to the drive shaft of the compressor 6. A cooling fan 10 is fitted to one drive shaft, a transmission pulley 16 is fitted to the other drive shaft, and the transmission pulley 16 and the drive pulley of the compressor are connected by a transmission belt 15 via an idle pulley 14 twisted with the belt transmission phase by the prescribed angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transportation refrigeration system having a condensing unit and used for land transportation.

[0002]

2. Description of the Related Art This type of land transportation refrigeration system (hereinafter referred to as a refrigeration system) is mainly installed in a truck and performs a cooling operation, a heating operation, and the like, so that a refrigeration vehicle mounted on the truck is mounted. The internal temperature is maintained at an arbitrary temperature.

FIG. 4 is an overall view of a truck equipped with this type of conventional refrigeration system. In FIG. 4, the refrigeration apparatus has a configuration in which a condensing unit 1 installed in a lower portion outside the freezer 100 and an evaporator 30 installed in the freezer 100 are connected by a refrigerant pipe 40.

FIG. 5 is a rear view of the truck showing a state in which the condensing unit 1 is installed. In FIG. 5, the condensing unit 1 has a front
00 so that it does not go outside from the side surface 100a.
The bracket 10 is attached to the lying 101 attached to the lower part.
It is hung by bolts via 2 and 102. The freezer 100 is installed on the two chassis channels 103 of the truck.

FIG. 6 is a plan view showing schematic components of the condensing unit 1 and the arrangement thereof.
FIG. 7 is a front view thereof. 6 and 7, a condensing unit 1 includes an engine 5 in a casing 2 thereof, a compressor 6 driven by the engine 5, an electric motor 7 driving the compressor 6 by a commercial power supply, a condenser 8 and a radiator 9. And a cooling fan 10 for cooling them are arranged with their drive shafts parallel to each other.

A suction port 3 and a suction port 4 for introducing outside air into the casing 2 are provided at a front surface 2a of the casing 2, and a discharge port 12 for discharging outside air flowing through a condenser 8 and a radiator 9 is provided at a back surface 2b. Have been. Engine 5
Is transmitted to the compressor 6 and the cooling fan 10 via the electric motor 7 via the centrifugal clutch 11 attached to the tip of the drive shaft.

While the car (the truck) is running, the engine 5
Is used, the centrifugal clutch 11 is brought into a connected state with the increase in the rotation speed of the engine 5, and the compressor 6 and the cooling fan 10 are 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 and the cooling fan 10 are driven. At this time, the centrifugal clutch 11 is in the disconnected state, so that the power of the electric motor 7 is not transmitted to the engine 5.

With the above configuration, when the compressor 6 is driven by the engine 5 or the electric motor 7, the high-pressure and high-temperature gas refrigerant compressed by the compressor 6 is sent to the condenser 8, where it is introduced by the cooling fan 10. It is cooled by the outside air and condensed and liquefied. This liquid refrigerant is sent to the evaporator unit 30 via the refrigerant pipe 40 shown in FIG. 4, where it cools the air inside the freezer 100 and evaporates. The gas refrigerant returns to the compressor 6 via the refrigerant pipe 40 and is compressed.

On the other hand, when the cooling fan 10 is driven, outside air is introduced into the casing 2 through the suction ports 3 and 4, flows through the condenser 8 and the radiator 9, and is discharged from the compressor 6 here. The high-pressure and high-temperature gas refrigerant is cooled, and the cooling water of the engine 5 is cooled and discharged from the outlet 12.

[0010]

In the condensing unit of the conventional large-sized vehicle refrigeration system described above, the drive shaft of the engine 5 is set in the depth direction L of the condensing unit 1 (shown in FIGS. 5 and 6). Since they are installed together, the depth dimension of the condensing unit 1 is determined by the external dimension of the engine 5 in the drive shaft direction.

In the case of a freezer for a trailer, the refrigerating capacity of the refrigerating apparatus is increased, and the output of the engine 5 is increased. This can be dealt with by increasing the displacement of the engine 5 such as by increasing the number of cylinders.
Of the condensing unit 1 also increases.

On the other hand, the dimension A (shown in FIG. 5) between the lower portion of the freezer, the outer side surface of the freezer, and the chassis channel 103, which is the installation space of the condensing unit 1, is not much different from the case of the above-mentioned trailer compared to the case of a large vehicle. . For this reason, as described above, when the depth dimension of the condensing unit in the trailer large refrigerating capacity refrigerating apparatus is increased, there is a problem that the condensing unit cannot be installed below the refrigerating vehicle. It is an object of the present invention to provide a transport refrigeration apparatus that can be installed below a refrigerator vehicle without increasing the depth dimension of a condensing unit.

[0013]

Means for Solving the Problems In order to solve the above problems and achieve the object, a transport refrigeration system of the present invention is configured as follows. (1) In a transport refrigeration apparatus of the present invention, an engine, an electric motor, a compressor, a condenser and a radiator selectively driven by the engine or the electric motor, and a drive source for the engine or the electric motor are provided in a casing. In a transport refrigeration apparatus having a condensing unit that is driven as a cooling fan that circulates outside air through the condenser and the radiator, the drive shaft of the compressor is arranged on the same axis as the drive shaft of the engine. The motor is connected to each other via a clutch, and the electric motor is a double-shaft motor, and the electric motor is disposed at a position where its drive shaft is perpendicular to the drive shaft of the compressor. Attach a cooling fan, attach a transmission pulley to the other drive shaft, A drive pulley of the movement pulley and the compressor, and is configured to be coupled to the belt transmission phase by the transfer belt interposed a predetermined angle twisting idle pulley. (2) The transport refrigeration apparatus of the present invention is the apparatus described in (1) above, and is configured such that the compressor is integrally connected to the engine via a housing. (3) The transport refrigeration apparatus according to the present invention is the apparatus described in (1) or (2) above, wherein the engine is disposed at one end in the longitudinal direction in the casing, and the compressor is disposed at a central portion thereof. And the electric motor is arranged on the other end side, and the condenser and the radiator are arranged in tandem with the cooling fan attached to one drive shaft of the electric motor.

As a result of taking the above-described measures, the following operations occur. (1) According to the transport refrigeration apparatus of the present invention, the drive shaft of the compressor is disposed on the same shaft as the drive shaft of the engine, and is connected to each other via a clutch. The electric motor is disposed at a position where its drive shaft is perpendicular to the drive shaft of the compressor, the cooling fan is attached to one of the drive shafts, and a transmission pulley is attached to the other drive shaft, and the transmission pulley Since the drive pulley of the compressor is configured to be connected with a transmission belt via an idle pulley that twists a belt transmission phase by a predetermined angle, the engine, the compressor, the electric motor, the condenser, the radiator, the cooling fan, etc. The depth dimension of the casing to be accommodated can be determined independently of the external dimension in the drive shaft direction of the engine, and Even if the refrigerating capacity of the refrigerating machine is increased and the external dimension in the drive shaft direction of the engine is increased, it is not necessary to change the depth dimension of the casing, and the condensing unit is installed below the outside of the refrigerating vehicle. Can be. (2) According to the transport refrigeration apparatus of the present invention, since the compressor is integrally connected to the engine via the housing, the compressor and the drive shaft of the engine are connected to the same shaft. Accordingly, the drive shaft can be arranged parallel to the front of the condensing unit, and the depth dimension of the casing can be determined independently of the external dimension in the drive axis direction of the engine. (3) According to the transport refrigeration apparatus of the present invention, the engine is arranged at one end in the longitudinal direction in the casing, the compressor is arranged at the center, and the electric motor is arranged at the other end. And the condenser and the radiator are arranged in tandem so as to face the cooling fan attached to one drive shaft of the electric motor. It can be determined independently of the external dimensions.

[0015]

1 is a plan view of a condensing unit in a transport refrigeration system according to an embodiment of the present invention, and FIG. 2 is a front view thereof. 1 and 2, the same parts as those in FIGS. 6 and 7 are denoted by the same reference numerals.

Referring to FIGS. 1 and 2, a compressor 6 is disposed in the casing 2. The drive shaft of the compressor 6 is concentric with the drive shaft of the engine 5, and the compressor 6 and the engine 5 are connected via a centrifugal clutch 11. In order to center the drive shafts of both the engine 5 and the compressor 6 concentrically, the compressor 6 is fixed and integrated with the engine 5 via a cylindrical housing 13.

An electric motor 7 having both drive shafts is arranged in the casing 2 so that the drive shaft is perpendicular to the drive shaft of the compressor 6. A cooling fan 10 is attached to one drive shaft end of the electric motor 7.
A condenser 8 and a radiator 9 are arranged in a tandem arrangement inside an exhaust port 12 provided on the front wall side 2a or the rear wall side 2b of the casing 2 which becomes the air flow of the cooling fan 10.

A transmission pulley 16 is attached to the other drive shaft end of the electric motor 7, and the power of the electric motor 7 is transmitted to the drive shaft of the compressor 6 via the transmission pulley 16, the transmission belt 15 and the centrifugal clutch 11. Is done. Since the drive shaft of the electric motor 7 and the drive shaft of the compressor 6 are arranged at right angles to each other, the transmission phase is set to 9
An idle pulley 14 twisting 0 degrees is interposed in the middle.

With the above configuration, when the engine 5 is used, the centrifugal clutch 11 is engaged, and the power of the engine 5 is transmitted to the compressor 6. At the same time, the power of the engine 5 is transmitted to the transmission belt 15 via the compressor 6, the transmission phase is converted by 90 degrees by the idle pulley 14, and the electric motor is driven by the transmission pulley 16 attached to the tip of the drive shaft of the electric motor 7. 7, the cooling fan 1 attached to the other end of the drive shaft.
0 will be driven.

The outside air is introduced into the casing 2 from the suction ports 3 and 4 provided on the front surface 2a of the casing 2 by the cooling fan 10, and the condenser 8 and the radiator 9
And is discharged from an exhaust port 12 provided on the back surface of the casing 2.

When the electric motor 7 is used by a commercial power source, the centrifugal clutch 11 is disengaged, and the power of the electric motor 7 is transmitted from the transmission pulley 16 to the transmission belt 15.
Is transmitted to the compressor 6 through the intermediate idle pulley 14, but is not transmitted to the engine 5.

By arranging the components as described above, the refrigerating capacity of the refrigerating apparatus for a trailer is increased, and even if the outer dimension 1 (shown in FIG. 1) of the engine 5 in the drive shaft direction is enlarged, the casing 2 This does not affect the depth dimension L (shown in FIG. 1), and can be reduced. Other configurations are the same as those of the conventional example shown in FIGS.

It should be noted that the present invention is not limited to only the above-described embodiment, and can be carried out with appropriate modification without departing from the scope of the invention. (Modification) FIG. 3 is a plan view of a condensing unit in a transportation refrigeration apparatus according to a modification of the embodiment of the present invention. 3, the same parts as those in FIG. 1 are denoted by the same reference numerals. As shown in FIG. 3, the arrangement of each component of the condensing unit may be an arrangement symmetrical to the arrangement shown in FIG.

1 and 3, the capacitors 8,
The radiator 9 and the outlet 12 are connected to the front 2 of the casing 2.
It can also be arranged on the a side. (Summary of Embodiment) The configuration, operation and effect shown in the embodiment are summarized as follows. [1] The transport refrigeration apparatus shown in the embodiment includes an engine 5, an electric motor 7, a compressor 6, a condenser 8, and a radiator selectively driven by the engine 5 or the electric motor 7 in a casing 2. 9, a transport refrigeration apparatus having a condensing unit 1 including a cooling fan 10 that is driven by the engine 5 or the electric motor 7 as a drive source and that circulates outside air to the condenser 8 and the radiator 9. The drive shaft of the compressor 6 is arranged on the same axis as the drive shaft of the engine 5, connected to each other via a clutch 11, and the electric motor 7 is a double-shaft motor,
The electric motor 7 is disposed at a position where its drive shaft is perpendicular to the drive shaft of the compressor 6, the cooling fan 10 is attached to one of the drive shafts, and the transmission pulley 16 is attached to the other drive shaft. The transmission pulley 16 and the drive pulley of the compressor 6 are connected by a transmission belt (15) via an idle pulley 14 that twists a belt transmission phase by a predetermined angle.

As described above, in the transport refrigeration system, the drive shaft of the compressor 6 is arranged on the same axis as the drive shaft of the engine 5 and connected to each other via the clutch 11 while the electric motor 7 is connected to both shafts. The electric motor 7 is disposed at a position where the drive shaft thereof is perpendicular to the drive shaft of the compressor 6, the cooling fan 10 is mounted on one of the drive shafts, and the transmission pulley is mounted on the other drive shaft. Since the transmission pulley 16 and the drive pulley of the compressor 6 are connected by a transmission belt (15) via an idle pulley 14 that twists a belt transmission phase by a predetermined angle, the engine is mounted. 5. Depth dimension of casing 2 accommodating compressor 6, electric motor 7, condenser 8, radiator 9, cooling fan 10, etc. Can be determined irrespective of the external dimension of the engine 5 in the drive axis direction, and even if the refrigerating capacity of the trailer refrigeration device increases and the external dimension of the engine 5 in the drive axis direction increases, the depth of the casing 2 can be increased. There is no need to change the dimensions, and the condensing unit 1 can be installed below the outside of the freezer. [2] The transportation refrigeration apparatus shown in the embodiment is the apparatus described in the above [1], and the compressor 6
Is integrally connected to the engine 5 via a housing 13.

As described above, in the transport refrigeration system, since the compressor 6 is integrally connected to the engine 5 via the housing 13, the drive shaft of the compressor 6 and the drive shaft of the engine 5 are connected. By being connected to the same axis, the drive shaft can be arranged in parallel to the front of the condensing unit 1, and the depth dimension of the casing 2 is determined independently of the external dimension of the engine 5 in the drive axis direction. Can be. [3] The transportation refrigeration apparatus described in the embodiment is the apparatus described in the above [1] or [2], wherein the engine 5 is disposed at one end of the casing 2 in the longitudinal direction. The compressor 6 is disposed at the center thereof, the electric motor 7 is disposed at the other end, and the condenser 8 and the radiator are opposed to the cooling fan 10 attached to one drive shaft of the electric motor 7. 9 are arranged in tandem.

As described above, in the transport refrigeration apparatus, the engine 5 is disposed at one end of the casing 2 in the longitudinal direction, the compressor 6 is disposed at the center, and the electric motor is disposed at the other end. Since the motor 7 is arranged and the condenser 8 and the radiator 9 are arranged in tandem with the cooling fan 10 attached to one drive shaft of the electric motor 7, the depth of the casing 2 is reduced. The dimensions can be determined independently of the external dimensions of the engine 5 in the drive axis direction.

[0028]

According to the present invention, it is possible to provide a transport refrigeration apparatus that can be installed under a refrigerator vehicle without increasing the depth of the condensing unit.

[Brief description of the drawings]

FIG. 1 is a plan view of a condensing unit in a transport refrigeration apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of a condensing unit in the transport refrigeration apparatus according to the embodiment of the present invention.

FIG. 3 is a plan view of a condensing unit in a transport refrigeration apparatus according to a modification of the embodiment of the present invention.

FIG. 4 is an overall view of a truck equipped with a refrigeration apparatus according to a conventional example.

FIG. 5 is a rear view of a truck showing an installation state of a condensing unit according to a conventional example.

FIG. 6 is a plan view showing schematic components of a condensing unit according to a conventional example and the arrangement thereof.

FIG. 7 is a front view showing a schematic configuration member of a condensing unit according to a conventional example and an arrangement state thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Condensing unit 2 ... Casing 3 ... Suction port 4 ... Suction port 5 ... Engine 6 ... Compressor 7 ... Electric motor 8 ... Condenser 9 ... Radiator 10 ... Cooling fan 11 ... Centrifugal clutch 12 ... Discharge port 13 ... Housing 14 ... Idle Pulley 15 ... Transmission belt 16 ... Transmission pulley 30 ... Evaporator 40 ... Refrigerant piping 100 ... Freezer 101 ... Horizontal 102 ... Bracket 103 ... Chassis channel

Claims (3)

[Claims] 1. An engine, an electric motor,
A compressor, a condenser and a radiator selectively driven by the engine or the electric motor, and a condensin comprising a cooling fan driven by the engine or the electric motor as a drive source and for flowing outside air to the condenser and the radiator In a transport refrigeration apparatus having a driving unit, the drive shaft of the compressor is arranged on the same shaft as the drive shaft of the engine, and connected to each other via a clutch, and the electric motor is a double-shaft motor. The electric motor is arranged at a position where its drive shaft is perpendicular to the drive shaft of the compressor, the cooling fan is attached to one of the drive shafts, the transmission pulley is attached to the other drive shaft, and the transmission pulley and the Compressor drive pulley and belt transmission phase A refrigeration system for transportation, characterized by being connected by a transmission belt via an idle pulley twisted at a predetermined angle. 2. The transportation refrigeration system according to claim 1, wherein said compressor is integrally connected to said engine via a housing. 3. The engine is disposed at one end of the casing in the longitudinal direction, the compressor is disposed at the center, the electric motor is disposed at the other end, and one of the electric motors is disposed. 3. The transportation refrigeration system according to claim 1, wherein the condenser and the radiator are arranged in tandem so as to face the cooling fan attached to a drive shaft.