JP2001191838A - Refrigerating device for land transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerating device for land transportation reduced in noise and improved in cooling effect. SOLUTION: This refrigerating device for land transportation has an evaporator unit provided inside a refrigerator of a vehicle, and a condenser, a compressor, an electric motor for driving the compressor, an engine and a radiator for the engine provided outside of the refrigerator of the vehicle to constitute a refrigerating cycle connected by refrigerant piping. The compressor, the electric motor for driving the compressor, and the engine are installed in a space covered with panels mounted with a sound absorbing material, of a casing having the space covered with the panels mounted with the sound absorbing material, and an open space provided with intake and exhaust parts outside of the panels, while the condenser, the radiator and cooling fans for the condenser and radiator are installed in the open space of the casing. Noise generated by the engine, electric motor, compressor, and the like which are main noise sources in operating the refrigerating device for land transportation is absorbed and insulated to remarkably reduce noise emitted outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration system for land transportation, and more particularly to a structure capable of reducing noise and the like.

[0002]

2. Description of the Related Art A conventional land transportation refrigeration system will be described with reference to FIGS. FIG. 4 is an explanatory view of the entire equipment of a conventional refrigeration unit for land transportation, FIG. 5 is a plan view showing the arrangement of main components of a condensing unit of the refrigeration unit for land transportation, and FIG. It is explanatory drawing of the installation state to the vehicle of the condensing unit shown by arrow D.

As shown in FIG. 4, a refrigeration system for land transportation includes a condensing unit 1 suspended from a chassis of a vehicle 200 outside and below a freezer 100, and a freezer 10.
The evaporator unit 30 installed in the chamber 0 is connected by a refrigerant pipe 40 to form a refrigeration cycle.

As shown in FIG. 6, a panel 3 of the condensing unit 1 is attached to a lateral joist 130 attached to a lower portion of the freezer 100 via a bracket 140 so that the panel 3 of the condensing unit 1 is mounted on the vehicle 20.
It is suspended so as to be outside of zero.

[0005] Inside the condensing unit, FIG.
As shown in FIG. 1, an engine 4, a compressor 5 driven by the engine 4, and an electric motor 6 driving the compressor 5 by a commercial power supply are provided in the casing 2.
Are arranged in parallel with their drive shafts.

The cooling fan 10 for the condenser 8 and the radiator 9 is directly connected to the drive shaft of the electric motor 6, and the condenser 8 and the radiator 9 are cooled by the cooling fan 10.

The power of the engine 4 is transmitted to the compressor 5 by a belt 15 via a belt 15 via a centrifugal clutch 12 attached to the tip of the drive shaft, via an electric motor 6 and by a belt 16.

While the vehicle 200 is running, the engine 4 is used, and the centrifugal clutch 1
2 is connected, and the compressor 5 and the cooling fan 10 are driven by the engine 4.

On the other hand, when commercial power can be used while the vehicle 200 is stopped, the electric motor 6 is used.
Thereby, the compressor 5 and the cooling fan 10 are driven.
In this case, since the engine 4 is stopped, the centrifugal clutch 1
2 is in a disconnected state, and the power of the electric motor 6 is not transmitted to the engine 4.

When the condensing unit 1 is mounted on a vehicle, a front portion 2 of a casing 2 facing the outside of the vehicle 200 is provided.
A panel 3 having a ventilation hole for introducing outside air into the casing 2 is provided at a, and an exhaust port 11 for discharging outside air flowing through the condenser 8 and the radiator 9 is provided at a rear portion 2b of the casing 2. .

In the above-described condensing unit 1, when the compressor 5 is driven by the engine 4 or the electric motor 6, the high-pressure, high-temperature gas refrigerant compressed by the compressor 5 is sent to the condenser 8, where it is cooled. It is cooled by the fan 10 and condensed and liquefied.

The liquid refrigerant is sent to the evaporator unit 30 through the refrigerant pipe 40 shown in FIG. 4, where the air in the refrigerator 100 is cooled and evaporated and vaporized. The vaporized gas refrigerant returns to the compressor 5 via another pipe of the refrigerant pipe 40.

On the other hand, when the cooling fan 10 is driven, the outside air is introduced into the casing 2 through the ventilation holes of the panel 3, and flows through the condenser 8 and the radiator 9. And the cooling water of the engine 4 is cooled and discharged from the exhaust port 11.

[0014]

In the above-mentioned conventional refrigeration system for land transportation, a large number of ventilation holes for introducing cooling air to the condenser 8 and the radiator 9 mounted in the condensing unit 1 are provided. Is installed so as to face the outside of the vehicle 200 and cover the front part 2a of the condensing unit 1, so that the operation noise of the engine 4, the compressor 5, and the like during the operation of the refrigeration system for land transportation is generated. The air is discharged to the outside through the ventilation holes of the panel 3, and further discharged from the condenser 8 and the radiator 9.
However, there is a problem that the noise value of the present refrigeration apparatus is increased due to the release of the refrigeration apparatus from outside.

An object of the present invention is to solve the problems of the conventional refrigeration equipment for land transportation, to provide a refrigeration equipment for land transportation which reduces noise and improves the cooling effect.

[0016]

Means for Solving the Problems (1) The present invention has been made to solve such problems, and the first aspect of the present invention has been made.
As a means for solving the problem, an evaporator unit provided in the freezer of the vehicle and a condenser, a compressor, an electric motor and an engine for driving the compressor, and a radiator of the engine provided outside the freezer of the vehicle are connected by refrigerant piping. In the land transportation refrigeration system constituting the refrigeration cycle, the compressor, the electric motor for driving the compressor, and the engine are provided with a space covered with a panel on which a sound absorbing material is mounted and an open / close section provided with a suction / exhaust section outside the panel. The sound absorbing material is installed in a space covered with a panel of a casing having a space, and the condenser, the radiator and the condenser, and a cooling fan of the radiator are installed in an open space of the casing. And a refrigeration unit for land transportation.

According to the first means, the engine, the compressor, the electric motor, and the like are covered by the panel on which the sound absorbing material is mounted, and are isolated from the open space through which outside air passes. Noise generated by an engine, an electric motor, a compressor, and the like, which are main noise sources during operation of the device, is absorbed and blocked, thereby reducing external emission noise.

(2) Further, as a second means, in the land transportation refrigeration system of the first means, the condenser and the cooling fan of the condenser are separately provided in place of the open space of the casing. The present invention provides a refrigeration system for land transportation characterized by being installed in an open space.

According to the second means, in addition to the features of the first means, since the condenser and its cooling fan are separated, they can be mounted in a place where the cooling effect is high and a sufficient space can be secured. As a result, the amount of cooling air is increased and the cooling effect of the condenser is improved.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory view of the entire equipment of a refrigeration unit for land transportation according to the present embodiment, and FIG.
FIG. 3 is a plan view of the main components of the capacitor unit of the land transportation device viewed from the arrow B in FIG. 1. FIG.

As shown in FIG. 1, a refrigeration system for land transportation according to the present embodiment
0 power unit 101 suspended from the chassis
And a condenser unit 120 mounted on an upper part of the front wall of the freezer 100, and an evaporator unit 30 in the freezer 100. The power unit 101 and the condenser unit 120 are refrigerant pipes 40a, and the condenser unit 120 and the evaporator unit 30 Refrigerant piping 4
0b to form a refrigeration cycle.

As shown in FIG. 2, the power unit 101 includes an engine 104, a compressor 105 driven by the engine 104, and an electric motor 106 for driving the compressor 105 by a commercial power supply in a casing 102 thereof. Are arranged in parallel.

The power of the engine 104 is driven by a belt 115 via a centrifugal clutch 112 mounted on its drive shaft.
The electric motor 106 is relayed to the compressor 105 via the belt 116.

While the vehicle 200 is running, the engine 104 is used, and the centrifugal clutch 112 is engaged with the increase in the rotation speed of the engine 104, and the compressor 105 is driven by the engine 104.

On the other hand, when commercial power can be used while the vehicle 200 is stopped, the electric motor 106 is used, and the electric motor 106 drives the compressor 105. In this case, since the engine 104 is stopped, the centrifugal clutch 112 is in the disconnected state, and the power of the electric motor 106 is not transmitted to the engine 104.

The cooling fan 110 of the radiator 109 is driven by an electric motor 113 directly connected thereto, and the radiator 109 is cooled by the cooling fan 110. Front part 102 of casing 102 of power unit 101
a is an intake port 1 for introducing outside air into the casing 102;
17 is provided, and a radiator 109 is provided on the back surface 102b.
An exhaust port 111 is provided for discharging outside air flowing through the air.

The power unit 101 is formed in an integral casing 102, and the engine 104, the electric motor 106, the compressor 105, etc.
2, panels 103a and 103 on which the sound absorbing material 118 is mounted.
b, 103c, 103d, 103e, and 103f are installed in a space covered by the radiator 109, the cooling fan 110, the electric motor 113, and the like.
It is installed in an open space having an intake port 117 and an exhaust port 111 outside the panels 103a to 103f inside.

As shown in FIG. 3, the condenser unit 120 is provided with a condenser 108, a condenser fan, a motor 121 and the like. Although not shown in FIG. 3, it goes without saying that the condenser unit 120 is an open space in which the intake port and the exhaust port for the outside air for cooling the condenser 108 are installed.

In the refrigeration system for land transportation according to the present embodiment configured as described above, the engine 104, the compressor 105, the radiator 109, the electric motor 106, the cooling fan 110 of the radiator 109, and the electric motor 113 directly connected thereto are used. The refrigerant gas discharged from the compressor 105 by the operation of the disposed power unit 101 is sent to the condenser 108 of the condenser unit 120 mounted on the freezer 100 via the refrigerant pipe 40a.

The refrigerant gas entering the condenser 108 exchanges heat with the external air sucked by the condenser fan and the motor 121 to be liquefied, and enters the evaporator unit 30 through the refrigerant pipe 40b. Cool and evaporate. The vaporized gas refrigerant is supplied to the refrigerant pipe 4
0b and another pipe of the refrigerant pipe 40a, and returns to the compressor 105 of the power unit 101.

The radiator 109 for cooling the cooling water of the engine 104 provided in the power unit 101 has a front portion 102 a of a casing 102 of the power unit 101.
The outside air sucked by the cooling fan 110 from the intake port 117 installed in the casing 102 is supplied through the open space in the casing 102, and the outside air exchanges heat with the cooling water in the radiator 109 and is discharged from the discharge port 111. .

The engine 104, the compressor 105, the electric motor 106, and the like are entirely or necessary covered by panels 103a to 103f on which a sound absorbing material 118 is mounted, and are isolated from an open space through which outside air passes.

Therefore, the engine 104 and the compressor 105, which are the main noise sources during operation of the refrigeration unit for land transportation,
In the power unit 101, the entire surface or necessary parts are covered by the panels 103a to 103f on which the sound absorbing material 118 is mounted, so that the noise generated by the operation of the engine 104, the compressor 105 and the like is absorbed and blocked, and the power unit 101 The noise emitted from the outside is reduced, and the power unit 101 can have low noise.

Further, in the present embodiment, the condenser unit 120 is separated from the power unit 101, housed in a casing forming another open space, and mounted on the front upper portion of the freezer 100, so that the noise of the power unit 101 can be reduced. With the realization of the above, the condenser 108 can be mounted in a place where a sufficient space can be secured, the cooling air amount is increased, the cooling effect of the condenser 108 is improved, and the performance of the refrigeration unit for land transportation can be improved. You can do it.

The embodiment of the present invention has been described with reference to FIGS. 1 to 3. Other embodiments, for example, not shown in FIG.
In the conventional condensing unit 1 shown in FIG. 1, the condenser 8, the radiator 9, the cooling fan 10 and the like are installed in an open space in the casing 2, and the whole or necessary parts of the engine 4, the electric motor 6, the compressor 5 and the like are described above. Similar to the embodiment, the casing 2 may be installed in a space covered by a plurality of panels to which the sound absorbing material is attached. Also in this case, the same effect as in the above embodiment can be obtained in the noise reduction effect.

[0036]

According to the first aspect of the present invention, the refrigeration system for land transportation is provided with an evaporator unit provided in a freezer of a vehicle and a condenser, a compressor and a compressor provided outside the freezer of the vehicle. An electric motor and an engine, and a refrigeration unit for land transportation having a refrigeration cycle connected by refrigerant pipes having a radiator of the engine, wherein the compressor, the electric motor and the engine for driving the compressor are equipped with a sound absorbing material. A casing having a space covered by the panel and an open space provided with an air intake / exhaust unit outside the panel, installed in a space covered by the panel in which the sound absorbing material is mounted,
Since the radiator, the condenser, and the cooling fan of the radiator are installed in the open space of the casing, an engine, an electric motor, a compressor, etc., which are main noise sources during operation of the refrigeration unit for land transportation, are generated. The noise is absorbed and blocked, so that the external emission noise is reduced, and the noise can be significantly reduced.

(2) According to the invention of claim 2, in the refrigeration system for land transportation according to claim 1, the condenser and a cooling fan of the condenser are provided in an open space of the casing. Instead, it is configured to be installed in another open space. In addition to the effect of the invention of claim 1, it is possible to mount the condenser and its cooling fan in a place where the cooling effect is high and a sufficient space can be secured. As a result, the amount of cooling air is increased, and the cooling effect of the condenser is improved, so that the performance of the refrigeration unit for land transportation can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the overall equipment of a refrigeration unit for land transportation according to an embodiment of the present invention.

FIG. 2 is a plan view of the power unit as viewed in the direction of arrow A in FIG. 1;

FIG. 3 is a plan layout view of the capacitor unit as viewed from arrow B in FIG. 1;

FIG. 4 is an explanatory view of the overall equipment of a conventional land transportation refrigeration system.

FIG. 5 is a plan view of the condensing unit as viewed in the direction of arrow C in FIG. 4;

FIG. 6 is an explanatory diagram of a state in which the condensing unit is installed in the vehicle, as viewed in the direction of arrows DD in FIG. 5;

[Explanation of symbols]

 Reference Signs List 30 evaporator unit 40a, 40b refrigerant pipe 100 freezer 101 power unit 102 casing 102a front part 102b back part 103a to 103f panel 104 engine 105 compressor 106 electric motor 108 condenser 109 radiator 110 cooling fan 111 exhaust port 112 centrifugal clutch 113 electric motor 115, 116 Belt 117 Intake port 118 Sound absorbing material 120 Capacitor unit 121 Condenser fan and motor 200 Vehicle

Claims (2)

[Claims] An evaporator unit provided in a freezer of a vehicle, a condenser, a compressor, an electric motor and an engine for driving the compressor, and a radiator of the engine, provided outside the freezer of the vehicle, are connected by refrigerant piping. In the land transportation refrigeration system constituting the refrigeration cycle, the compressor, the electric motor for driving the compressor, and the engine are provided with a space covered with a panel on which a sound absorbing material is mounted and an open / close section provided with a suction / exhaust section outside the panel. A casing having a space and installed in a space covered with the panel on which the sound absorbing material is mounted, the capacitor;
A refrigeration system for land transportation, wherein a radiator, a condenser, and a cooling fan for the radiator are installed in an open space of the casing. 2. The refrigeration system for land transportation according to claim 1, wherein the condenser and a cooling fan of the condenser are installed in another open space instead of being installed in an open space of the casing. A refrigeration unit for land transportation characterized by the following.