JPH0924730A - Refrigerating unit for land transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the depth size of a main casing invariable, by connecting the rotating shafts of a compressor and an engine to the same shaft center, providing the rotating shafts parallel to the front surface of a condensing unit along the longitudinal direction of a refrigerated car, and housing a radiator fan, a condenser fan, an electric motor, and the like. SOLUTION: An engine 5 and a compressor 6 are provided by connecting their rotating shafts almost on the same shaft center each other, while making the same shaft center along the longitudinal direction of a refrigerated car. When the side surface of the refrigerated car is made as the front surface of a casing 41, a radiator 9, and an exclusive fan 14 are positioned, and a condenser 8, and a fan 15 driven by an exclusive fan motor 16, are provided at the front wall side or at the rear wall side of the casing 41. Furthermore, an electric motor 7 is provided at the lower part of a chassis of the vehicle, at the rear side of the casing 41, parallel to the rotating shaft of the engine 5. Consequently, even though the outer size of the engine 5 in the axial direction is expanded, the depth size of the casing 41 can be made with no alteration.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus for land transportation, and more particularly to an undermount type condensing unit for a trailer, which is used by being suspended under a stand of a trailer equipped with the same.

[0002]

2. Description of the Related Art A refrigerating apparatus for land transportation (hereinafter abbreviated as "refrigerating apparatus") is mainly installed on a truck, and cooling operation, heating operation, etc. are performed to control the temperature inside the freezer mounted on the truck. The temperature is maintained at an arbitrary set temperature.

An example of a conventional refrigeration system for a large vehicle is shown in FIGS. 4, 5 and 6, FIG. 4 is an overall equipment diagram, and FIG. 5 is a rear view of the vehicle showing the installation state of a condensing unit. Shows a schematic constituent member of the condensing unit and its arrangement state, (A) is a plan view, and (B) is a front view.

First, in FIG. 4, the present refrigerating apparatus is composed of a condensing unit 1 installed on the outer lower part of the freezer 100 and an evaporator unit 2 installed in the freezer 100 connected by a refrigerant pipe 3.

In FIG. 5, the condensing unit 1
Is mounted on the lower part of the freezer 100 by bolting it to the lying 101 through the bracket 102 so that the front surface 1a of the condensing unit 1 is the side surface 10 of the freezer 100.
It is hung so that it does not go out from 0a.

The freezer 100 is installed on the two chassis channels 103 of the truck.

In FIG. 6, the condensing unit 1
Is an engine 5, a compressor 6 driven by the engine 5, an electric motor 7 for driving the compressor 6 by a commercial power source, and a condenser 8 in the casing 4.
A cooling fan 10 that introduces outside air into the radiator 9 and cools the outside air is arranged with their drive shafts in parallel.

A suction port (not shown) for introducing outside air into the casing 4 is provided on the front face 4a of the casing 4 on the rear face 4a.
An exhaust port 12 for discharging the outside air that has passed through the condenser 8 and the radiator 9 is provided at b.

The power of the engine 5 and the centrifugal clutch 11 attached to the tip of the drive shaft thereof are transmitted to the compressor 6 and the cooling fan 10 by relaying the electric motor 7.

The engine 5 is used while the vehicle is running, and as the engine speed increases, the centrifugal clutch 11 enters the connected state and the compressor 6 and the cooling fan 10 are driven. On the other hand, when the vehicle is stopped and commercial power can be used, 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 a disengaged state so that the power of the electric motor 7 is not transmitted to the engine 5.

When the compressor 6 is driven by 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 cooled by the outside air introduced by the cooling fan 10. It is condensed and liquefied. This liquid refrigerant is sent to the evaporator unit 2 (see FIG. 1) via the refrigerant pipe 3 (see FIG. 1), where the air inside the freezer 100 is cooled and vaporized. This gas refrigerant returns to the compressor 6 via the refrigerant pipe 3 and is compressed.

On the other hand, the cooling fan 10 is driven, and the outside air is introduced into the casing 4 through the suction port and the condenser 8
And the radiator 9, where the high-pressure and high-temperature gas refrigerant discharged from the compressor 6 is cooled, and the engine 5 is cooled.
The cooling water is cooled and discharged from the exhaust port 12.

[0013]

The conventional land transportation refrigeration system for large vehicles has the following problems to be solved.

That is, in the conventional condensing unit 1 for a large vehicle refrigeration system, as shown in FIG. 6, the drive shaft of the engine 5 is installed at a right angle to the front surface 1a of the condensing unit 1. The depth dimension D of the condensing unit 1 is determined by the outer dimension d of the engine 5.

This arrangement is sufficient for a large vehicle, but when it is used for a trailer, the refrigerating capacity of the refrigerating device becomes large. Therefore, as the output of the engine 5 increases, the outer shape of the engine 5 in the axial direction is increased. The dimension d increases and the depth dimension D of the condensing unit 1 also increases.

On the other hand, the dimension A between the lower part of the freezer 100, the side surface 100a of the freezer and the chassis channel 103, which is the installation space of the condensing unit 1, is almost the same as that of a large vehicle even with a trailer. In the case of the arrangement as shown in FIG. 6, there is a problem that the condensing unit 1 cannot be installed below the freezer due to the increased depth dimension D.

An object of the present invention is to provide a refrigerating apparatus for land transportation which solves the above problems.

[0018]

As a means for solving the above problems, the present invention provides a compressor, an engine, a condenser and a radiator which are driven by selectively transmitting the power of an engine and an electric motor in a casing. In a land transportation refrigeration system in which a condensing unit having ventilation means for introducing and flowing outside air is installed under the outside of the refrigeration vehicle, the rotary shafts of the two are connected on substantially the same axis. Along with the above-mentioned engine and compressor arranged coaxially along the longitudinal direction of the refrigeration vehicle,
When the side surface of the refrigerating car is the front surface of the casing, a radiator provided on the side wall side of the casing and a radiator fan driven by the engine, and a condenser provided on the front wall side or the back wall side of the casing. A condenser fan driven by a dedicated fan motor, and the electric motor provided at a position behind the engine or compressor position of the casing and below the chassis channel of the refrigeration vehicle with the rotation axis parallel to the rotation axis of the engine. In order to configure a refrigeration apparatus for land transportation characterized by comprising: an engine, a compressor, a condenser, A portion that accommodates a radiator, that is, a casing (hereinafter, referred to as a "main casing"). The depth dimension (in the left-right direction of the refrigeration vehicle) can be determined independently of the axial dimension of the engine, so even if the refrigerating capacity for the trailer is increased and the axial dimension of the engine is expanded, The depth of the main casing can be changed without changing it.

A portion for accommodating the electric motor (hereinafter referred to as "
The height of the "sub-casing" can be lower than that of the main casing.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) A first embodiment of the present invention will be described with reference to FIGS. The same components as those in the conventional example are designated by the same reference numerals, and the description thereof will be omitted unless necessary.

Further, in the description, unless otherwise specified, for example, "rear surface of car", "front", "rear surface", "side surface" and the like are the condensing unit 1, specifically, the casing 4, the main casing. Say 41. In this embodiment, the left side surface of the refrigeration vehicle (trailer) is the front surface of the condensing unit 1, that is, the casing 4 and the like.

The rotary shaft may be referred to as a "driving shaft" regardless of the strictness of driving and driven.

FIG. 1 is a view of this embodiment, (A) is a plan view of the condensing unit, and (B) is a front view thereof. The left side of the figure is the front of the car. FIG. 2 is a rear view of the vehicle showing the installation state of the condensing unit.

In FIG. 1, the condensing unit 1
The casing 4 is a main casing 41 and its rear surface 41.
and a sub-casing 42 protruding to b.

Inside the main casing 41, a compressor 6 is connected to the left side of the engine via a centrifugal clutch 11 so that its drive shaft is concentric with the drive shaft of the engine 5.

If the engine 5 and the compressor 6 are separately installed, it becomes difficult to center the drive shafts of the both, so that the compressor 6 is fixed to and integrated with the engine 5 through a cylindrical housing 13. .

A radiator exhaust port 17 is provided on the right side surface of the main casing 41, a radiator 9 is provided inside the radiator exhaust port 17, and a radiator fan 14 for introducing outside air into the radiator 9 is belt-driven by the engine 5.

The front surface 41a of the main casing 41
A condenser exhaust port 18 is provided therein, the condenser 8 is arranged inside the condenser exhaust port 18, and a condenser fan 15 for introducing outside air into the condenser 8 is driven by a motor 16.

An electric motor 7 is installed in the sub-casing 42 such that its drive shaft is parallel to the drive shaft of the engine 5. The drive shaft of the electric motor 7 is a drive shaft of the compressor 6 and the engine 5 via a belt and a centrifugal clutch 11. Connected to.

Thus, when the engine 5 is used, the centrifugal clutch 11 is in the connected state, and the power of the engine 5 is transmitted to the compressor 6 and the radiator fan 14 to drive them. At this time, the power of the engine 5 is transmitted to the electric motor 7 via the compressor 6 and causes it to idle.

When the electric motor 7 is used,
The centrifugal clutch 11 is in a disengaged state, and the power of the electric motor 7 is transmitted to the compressor 6 but not to the engine 5.

In any case, the condenser fan motor 16 is driven by the AC power supplied from the AC power generation / storage mechanism (not shown) driven by the power of the engine 5 to drive the capacitor fan 15.

By the arrangement of the respective constituent members as described above,
Even if the refrigerating capacity of the refrigerating device for a trailer is increased and the outer dimension d of the engine 5 in the axial direction is increased, the depth dimension D of the main casing 41 is not affected and can be reduced.

Further, since the height dimension H of the sub-casing 42 in which the electric motor 7 is arranged can be lowered, the condensing unit 1 is provided between the side surface 100a of the freezer 100 and the chassis channel 103 as shown in FIG. The main casing 41 can be installed below the chassis channel 103 with the sub-casing 42 embedded therein.

(Second Embodiment) A second embodiment of the present invention will be described with reference to FIG. This embodiment is the same as the first embodiment except that the arrangement of the constituent members is symmetrical with that of the first embodiment as shown in the figure.

In the above first and second modes, that is, in FIGS. 1 and 3, the condenser exhaust port 18 and the condenser 8 can be arranged on the rear surface 41b side of the main casing.

Further, in any of the above arrangements, the electric motor 7 can be arranged in the rear portion of the engine 5 (shown by a chain double-dashed line in FIG. 1). Is the same as the conventional one shown in FIGS. 4 to 6, and corresponding members are designated by the same reference numerals.

As described above, according to the first and second modes, the drive shafts (rotating shafts) of the engine 5 and the compressor 6 are concentrically connected to each other and face the front-back direction of the vehicle (trailer), and the condensing unit 1 Since it has nothing to do with the depth dimension D of
There is an advantage that the depth dimension of the main casing 41 is sufficient even if the refrigerating capacity is sufficiently increased and the engine 5 is enlarged.

The electric motor 7 has a main casing 4
1, the rear of the position where the engine 5 or the compressor 6 is located, and the rotation axis thereof are arranged in parallel with each other and at the position below the chassis channel 103, so that the installation location of the condensing unit 1 can be selected freely. It has the advantage of not being bound.

[0040]

The present invention has the following effects because it is configured as described above.

That is, in the present invention, since the rotary shafts of the compressor and the engine are connected to the same axis and extend in the front-rear direction of the refrigerating vehicle, the rotary shafts may be arranged parallel to the front surface of the condensing unit. Since the depth dimension of the part that houses the engine, compressor, condenser, radiator, etc. (hereinafter referred to as the main casing) can be determined independently of the external dimensions of the engine in the axial direction, the refrigerating capacity of the trailer refrigeration system is increased. ,
Even if the axial dimension of the engine increases, the depth of the main casing does not need to change.

Further, since the electric motor has its rotation axis parallel to the engine rotation axis and is arranged behind the engine or the compressor, the height of the portion accommodating the electric motor (hereinafter referred to as the sub-casing) is the main casing. Can be lower than.

Therefore, the condensing unit may be installed below the outside of the refrigeration vehicle in such a manner that the main casing part is inserted between the side surface of the freezer and the chassis channel of the freezer and the sub casing part is inserted under the chassis channel. it can.

[Brief description of drawings]

FIG. 1 is a diagram of a condensing unit of a refrigeration apparatus for land transportation according to a first embodiment of the present invention, (A) is a plan view, (B) is a front view, FIG.

FIG. 2 is a rear view of the vehicle showing the installation state of the condensing unit of the first embodiment,

FIG. 3 is a plan view of a condensing unit of the refrigeration apparatus for land transportation according to the second embodiment of the present invention,

FIG. 4 is an overall perspective view of a conventional refrigeration apparatus for land transportation,

FIG. 5 is a rear view of the vehicle showing the installation state of the condensing unit of the conventional refrigeration apparatus for land transportation,

FIG. 6 is a diagram of the conventional condensing unit,
(A) is a plan view and (B) is a front view.

[Explanation of symbols]

 1 Condensing Unit 4 Casing 5 Engine 6 Compressor 7 Electric Motor 8 Condenser 9 Radiator 14 Radiator Fan 15 Condenser Fan 16 Motor 41 Main Casing 41a Front (Main Casing) 41b Rear (Main Casing) 42 Sub Casing 100 Freezer 103 Chassis Channel

Claims (1)

[Claims] 1. A compressor, an engine, a condenser, and a radiator driven by selectively transmitting power of an engine and an electric motor in a casing, and ventilation means for introducing and passing outside air into them. In a refrigeration system for land transportation, in which a condensing unit is installed below the refrigeration vehicle outside, the mutual rotation axes are connected on substantially the same axis and the coaxial cores are arranged along the front-rear direction of the refrigeration vehicle. When the side face of the casing is the side face of the casing and the side face of the engine and the compressor, the radiator provided on the side wall side of the casing, the radiator fan driven by the engine, and the front wall side or the back face of the casing. Install the condenser installed on the wall side and the condenser fan driven by the dedicated fan motor, Refrigeration for land transportation, comprising: the electric motor provided in a position parallel to the rotation axis of the engine, behind the engine or compressor in the casing and below the chassis channel of the refrigeration vehicle. apparatus.