JP5535455B2 - Sub-engine refrigeration system for transportation - Google Patents

Description

  The present invention relates to a so-called undermount type sub-engine type transport refrigeration apparatus mounted under a chassis of a vehicle.

  Under-mounting type sub-engine type transport refrigeration systems have traditionally included sub-engines, radiators, electric motors (standby motors), alternators, and other power systems inside a rectangular frame that forms the outer frame of the casing. In addition to the devices, all the devices and the like constituting the condensing unit of the refrigeration apparatus such as a refrigerant compressor, a condenser, a condenser fan, a receiver, and an accumulator have been accommodated and installed (see, for example, Patent Document 1). In such a unit, the outer dimension of the frame is substantially equal to the outer dimension of the unit.

  As described above, in the configuration in which all the components on the condensing unit side including the power system device are accommodated in one unit, that is, in the frame, the size of the frame increases as the unit increases in size. As the size of the frame increases, the frame on which the sub-engine with a large self-exciting force is mounted needs to have a stronger structure in order to ensure vibration resistance. Becomes heavy. As a result, the weight balance of the mounted vehicle is also adversely affected. Therefore, as shown in Patent Document 2, there has been proposed a power system package and a heat exchange system package which are separately mounted on a vehicle.

JP 2001-41629 A Japanese Patent Laid-Open No. 8-1119027

  However, as described above, in the configuration in which all the components on the condensing unit side including the power system device are accommodated and installed inside the frame, the frame becomes large, which causes an increase in weight. In addition, as the frame becomes larger, various reinforcing members are required to increase the rigidity, which leads to a vicious circle in which the weight further increases. In addition, the external dimensions of the frame are almost the same as the external dimensions of the unit, and a part of the external dimensions are exposed to the outside from the outer panel, so that the frame is exposed to corrosive environment, which may cause corrosion of the frame, etc. Had problems.

  On the other hand, as in Patent Document 2, if the condensing unit is separated into two packages and each of them is reduced in size, the frame can be reduced in size and increased in rigidity, so that the weight can be reduced. . However, in such a configuration, various problems such as complexity due to separation into two packages and manufacturing problems as well as complications during mounting are inherent.

  The present invention has been made in view of such circumstances, and by improving the arrangement structure of the condensing unit components, the size of the frame can be reduced, and high rigidity, weight reduction, material cost reduction, and the like are possible. An object of the present invention is to provide a sub-engine type transport refrigeration apparatus.

In order to solve the above problems, the sub-engine type transport refrigeration apparatus of the present invention employs the following means.
That is, the sub-engine type transport refrigeration apparatus according to the present invention includes at least a sub-engine and an electric motor that drive a refrigerant compressor on a rectangular frame, and condensing of the refrigeration apparatus including the refrigerant compressor. In the sub-engine type transport refrigeration apparatus in which the unit components are installed, the sub-engine main body, the electric motor, and the refrigerant compressor are installed in a frame of the frame, and the condensing excluding the refrigerant compressor A part of the unit component equipment is placed out of the frame and overhangs, and a part of the condensing unit component equipment is a capacitor section including a capacitor and a capacitor fan. installation and overhang issued outside the frame of the frame It is characterized in that is.

According to the present invention, the sub-engine main body, the electric motor, and the refrigerant compressor, which are heavy objects, are installed in the frame of the frame, and a part of the condensing unit component device excluding the refrigerant compressor is taken out of the frame of the frame and overhanged Therefore, the frame, which is a strength member, can be reduced in size by the amount corresponding to the equipment of the condensing unit installed out of the frame due to the overhang. Therefore, it is possible to increase the rigidity by reducing the size of the frame itself without using a reinforcing member, as well as to reduce the weight and the material cost. can do. In addition, since the capacitor section including the capacitor and capacitor fan is installed in an overhang outside the frame, the large volume capacitor section is taken out of the frame, and the frame is moved inward by that amount. It is possible to reduce the size more effectively. Therefore, the effects of increasing the rigidity, reducing the weight, and reducing the material cost due to the reduction in the size of the frame can be conspicuous.

  Furthermore, the sub-engine transport refrigeration apparatus of the present invention is the above-described sub-engine transport refrigeration apparatus, wherein the condenser section is installed overhanging on one end side of the frame that is framed in a rectangular shape. It is characterized by being.

  According to the present invention, since the capacitor section is installed overhanging on one end side of the rectangular frame, the width direction dimension of the frame corresponds to the width direction dimension occupied by the capacitor section. Can only be made smaller. Therefore, effects such as increased rigidity, weight reduction, and material cost reduction due to the downsizing of the frame can be made remarkable.

  Furthermore, the sub-engine transport refrigeration apparatus of the present invention is the above-described sub-engine transport refrigeration apparatus, wherein the condenser section includes a radiator for the sub-engine that is cooled via the condenser fan. It is characterized by being installed.

  According to the present invention, since the radiator for the sub-engine that is cooled via the condenser fan is included in the condenser section and installed outside the frame, the frame can be further downsized accordingly. Therefore, the rigidity can be further increased, the weight can be reduced, and the material cost can be reduced by downsizing the frame. Further, by sharing the condenser fan with the radiator, the configuration can be simplified and made compact.

  Furthermore, the sub engine type transport refrigeration apparatus of the present invention is the above sub engine type transport refrigeration apparatus, wherein the condenser fan is a fan directly connected to a motor shaft of the electric motor or is independently installed. It is characterized by comprising an electric fan.

  According to the present invention, since the capacitor fan is configured by a fan directly connected to the motor shaft of the electric motor or an electric fan installed independently, the capacitor fan can be configured even when the capacitor section is out of the frame. Therefore, it is not necessary to change the configuration and the drive system, and therefore, a highly reliable cooling function and performance by the capacitor fan can be ensured in the capacitor section.

Furthermore, in the sub-engine type transport refrigeration apparatus of the present invention, in any one of the above-described sub-engine type transport refrigeration apparatuses, a part of the condensing unit component device is an accumulator and / or a receiver, / or receiver, characterized in that it is provided with the overhang is issued outside the frame of the frame.

According to the present invention, since the accumulator and / or receiver is placed outside the frame of the frame and overhanged, the accumulator and / or receiver having a relatively large outer shape is taken out of the frame of the frame, and the frame is increased accordingly. The frame can be more effectively downsized by reducing the depth dimension and the like toward the inside. Therefore, effects such as increased rigidity, weight reduction, and material cost reduction due to the downsizing of the frame can be made remarkable.

Furthermore, the sub-engine transport refrigeration apparatus of the present invention is the above-described sub-engine transport refrigeration apparatus, wherein a part of an oil pan provided at a lower portion of the sub-engine body is out of the frame. issued by, characterized in that it is provided with an overhang.

According to the present invention, since the part of the oil pan is provided under the sub-engine body established by overhanging out outside the frame of the frame, the frame part of the oil pan the height of the frame It is possible to reduce the size of the frame more effectively by reducing the size of the frame by the amount outside the frame. Therefore, effects such as increased rigidity, weight reduction, and material cost reduction due to the downsizing of the frame can be further conspicuous.

  Furthermore, the sub-engine type transport refrigeration apparatus of the present invention is the above sub-engine type transport refrigeration apparatus, wherein the sub-engine main body, the electric motor, and the refrigerant compressor are connected to the sub-engine main body as a pulley. The electric motor is integrally coupled through a housing, and the refrigerant compressor is installed on the pulley housing so as to be integrated into a module, which is supported by the frame through vibration isolation means. It is characterized by that.

  According to the present invention, the sub-engine main body, the electric motor, and the refrigerant compressor are integrated into a module via the pulley housing, and this is supported by the frame via the vibration isolation means. A base plate or the like for supporting a certain sub-engine, electric motor, and refrigerant compressor in a vibration-proof manner can be eliminated. Further, it is possible to further reduce the size by making the frame correspond to the external shape of each device that is compactly integrated by modularization. Accordingly, it is possible to further improve the effects of increasing the rigidity of the entire apparatus and the frame, reducing the weight, and reducing the material cost.

  Furthermore, the sub-engine type transport refrigeration apparatus of the present invention is the above-described sub-engine type transport refrigeration apparatus, wherein the electric motor has only power from the sub engine side to the electric motor side on the output shaft of the sub engine. The refrigerant compressor is connected to a clutch pulley provided on the driven side of the one-way centrifugal clutch by either the sub engine or the electric motor via a drive belt. It is connected to be drivable.

  According to the present invention, the electric motor is directly connected to the output shaft of the sub-engine via the one-way centrifugal clutch that transmits only power from the sub-engine side to the electric motor side, and is provided on the driven side of the one-way centrifugal clutch. Since the refrigerant compressor is connected to the clutch pulley via a drive belt so as to be driven by either the sub-engine or the electric motor, the configuration of the drive system for driving the refrigerant compressor can be simplified. The alignment can be adjusted easily. As a result, maintenance can be facilitated, costs can be reduced, and the quality and reliability of the apparatus can be improved.

  Furthermore, the sub-engine transport refrigeration apparatus of the present invention is the above-described sub-engine transport refrigeration apparatus, wherein the frame is attached to the frame together with the devices and components installed outside the frame. It is characterized in that the entire outside is covered with the outer panel formed.

  According to the present invention, the frame is not exposed to the outside of the outer surface panel because the entire outer surface is covered by the outer surface panel attached to the frame together with each device and component installed outside the frame. In other words, the entire frame is inevitably disposed inside the outer panel by moving the frame toward the inside and taking out some devices and parts outside the frame and covering the entire outside with the outer panel. . As a result, the frame is not directly exposed to the corrosive environment, and the corrosion resistance can be improved.

According to the present invention, since the frame which is a strength member can be moved inward by the amount of the condensing unit components installed outside the frame, the rigidity can be increased by reducing the size of the frame itself. In addition, the weight can be reduced, the material cost can be reduced, and thus the entire apparatus can be reduced in weight and cost. In particular, it is possible to reduce the size of the frame more effectively by moving the capacitor section including the capacitor and capacitor fan with a large volume out of the frame and moving the frame inward by that amount. The effects such as up, weight reduction and material cost reduction can be made remarkable.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a simplified cross-sectional view of a part of a sub-engine transport refrigeration apparatus according to an embodiment of the present invention, and FIG. 2 shows a perspective view with an outer panel removed. 3 is a perspective view showing a state in which devices provided in the frame of the frame are installed, and FIG. 4 is a perspective view in a state in which a capacitor section provided outside the frame of the frame is installed. 5 is a vertical cross-sectional equivalent view with a portion omitted near the sub-engine installation portion, and FIG. 6 is a vertical cross-section equivalent view with a portion omitted near the electric motor installation portion. 7 is a schematic side view of a sub-engine, an electric motor, a refrigerant compressor, and an alternator that are integrally modularized.

  The sub-engine type transport refrigeration apparatus 1 includes a frame 2 configured by a plurality of box members 2A to 2L being framed in a rectangular shape. The overall structure of the frame 2 framed in a rectangular shape is shown in FIG. The periphery of the frame 2 is mounted on the frame 2 by outer panels such as a front panel 3, a rear panel 4, a top panel 5, and a bottom panel 6 (see FIGS. 1 and 5 and 6), as will be described later. The entire device including the outside of the device is covered. In addition, the sub-engine type transport refrigeration apparatus 1 according to the present embodiment is constructed such that the four corners of the frame 2 are suspended from the chassis lower part on either one of the left and right sides of the refrigerator car.

  As shown in FIGS. 3 and 4, the frame 2 has an elongated rectangular shape along the front-rear direction of the vehicle. Hereinafter, in this embodiment, the dimension in the length direction is the width dimension, and the depth direction is The dimension is called the depth dimension, the dimension in the height direction is called the height dimension, and the front side shown in the figure is the front (surface facing the outside of the vehicle side in the vehicle body state), and the back side is the back The upper surface is referred to as the upper surface, the lower surface as the bottom surface, the vehicle front side surface as the front end surface, and the vehicle rear side surface as the rear end surface.

  As shown in FIGS. 1 to 3, the rectangular frame of the frame 2 is supplied with electric power from a water-cooled sub-engine (refrigerator driving engine) 7 and an external commercial power source. The standby electric motor 8 that is driven, the refrigerant compressor 9 that is driven by receiving power from either the sub-engine 7 or the electric motor 8, and the power that is received from either the sub-engine 7 or the electric motor 8 A driven alternator 10 is installed.

  In addition to the radiator 11 and air cleaner 12 attached to the sub-engine 7, a cooling water pump, an oil pump, a starter motor, an exhaust muffler, and other auxiliary devices (not shown) are also mounted on the frame 2. become. Further, on the frame 2, as a device constituting a condensing unit of the refrigeration apparatus, in addition to the refrigerant compressor 9, a condenser 13, a condenser fan 14, a receiver 15, an accumulator 16, an oil separator, a dryer, a sight glass (not shown) Etc. are mounted as described later. In addition, a control box 17 is mounted on the frame 2.

  The sub-engine 7 is disposed on the rear end side of the frame 2, and as shown in FIG. 7, the rotation axis 7A of the output shaft (not shown) is disposed along the vehicle front-rear direction, and the output shaft is the front Is protruding. An electric motor 8 is disposed on the front side of the sub-engine 7. The axis of the motor shaft 8A of the electric motor 8 and the rotation axis 7A of the output shaft of the sub engine 7 are arranged on the same axis, and the output shaft of the sub engine 7 and the motor shaft 8A of the electric motor 8 are They are directly connected via a known one-way centrifugal clutch 18. The one-way centrifugal clutch 18 is configured to transmit power to the electric motor 8 side when the rotation speed of the sub-engine 7 becomes equal to or higher than a predetermined rotation speed, and not transmit power to the sub-engine 7 side from the electric motor 8 side. The clutch pulley 19 is provided on the driven side connected to the motor shaft 8 </ b> A of the electric motor 8.

  As shown in FIGS. 1 to 3, a condenser fan (propeller fan) 14 is directly connected to the tip of the motor shaft 8 </ b> A of the electric motor 8. With this configuration, the condenser fan 14 is driven by the sub engine 7 via the one-way centrifugal clutch 18 and the electric motor 8 (idle because of no power supply) while the sub engine 7 is being driven. When the electric motor 8 is stopped and driven, it is driven by the electric motor 8.

  Further, around the electric motor 8, a refrigerant compressor 9 and an alternator 10 are arranged in parallel in the upper space with the rotation axes 9A and 10A (see FIG. 7) along the vehicle front-rear direction. The rotation shafts (not shown) of the refrigerant compressor 9 and the alternator 10 protrude rearward as shown in FIGS. 2 and 7, and pulleys 20 and 21 are provided at the ends of the respective shafts. ing. A drive belt (V-belt) 22 is installed between the pulleys 20 and 21 and the clutch pulley 19, and the refrigerant compressor 9 and the alternator 10 are connected to the one-way centrifugal clutch 18 while the sub-engine 7 is driven. The sub-engine 7 is driven (in this case, the electric motor 8 is idling). When the sub-engine 7 is stopped and the electric motor 8 is driven, the electric motor 8 is driven.

  The refrigerant compressor 9 constitutes the refrigeration cycle of the refrigeration apparatus, and the type of the refrigerant compressor 9 is not particularly limited, or is desirably as small and high performance as possible. An open-type scroll compressor having one end protruding outside the housing is used. The alternator 10 is for supplying DC power (12 volts) to an evaporator fan motor of an evaporator unit (not shown) installed in the freezer, a controller, a starter motor of the sub engine 7, and the like.

  The sub engine 7, the electric motor 8, the refrigerant compressor 9, and the alternator 10 are coupled to the side surface of the sub engine 3 on the output shaft side so as to surround the output shaft, the one-way centrifugal clutch 18, the clutch pulley 19, and the like. Are coupled together through a pulley housing 23 provided. That is, the electric motor 8 is fixedly installed on the end surface of the pulley housing 23 coupled to the side surface of the main body of the sub-engine 7 so as to be integrally coupled, and the pulley housing 23 is connected to the upper portion of the outer peripheral surface via the bracket 24. Thus, the refrigerant compressor 9 and the alternator 10 are fixedly installed and coupled together. The refrigerant compressor 9 and the alternator 10 are disposed so as to protrude into the upper space around the electric motor 8 having a smaller capacity than the sub-engine 7.

  Further, the sub-engine 7, the electric motor 8, the refrigerant compressor 9, the alternator 10, and the condenser fan 14 are arranged in series on the frame 2 with their rotation axes directed in the front-rear direction. The sub-engine 7, the electric motor 8, and the condenser fan 14 are configured to be directly connected to each other in series on the same axis. In addition, among these devices, the sub-engine 7, the electric motor 8, the refrigerant compressor 9, and the alternator 10 are integrated into a module through the pulley housing 23, and the anti-vibration rubber (at a plurality of locations in the front-rear direction on the frame 2). The anti-vibration support is provided via the anti-vibration means 25.

  Here, the main body of the sub-engine 7, the electric motor 8, the refrigerant compressor 9, and the alternator 10 are frame 2 that is framed in a rectangular shape by a plurality of box members 2A to 2L, as shown in FIG. It is installed to fit within the frame. Further, a condenser fan (propeller fan) 14 that is directly connected to the tip of the motor shaft 8 </ b> A is provided at a position extending forward from the front end surface of the frame 2. The main body of the sub-engine 7 is an engine main body including a cylinder head, a cylinder, a crankcase, and the like. A radiator 11, an air cleaner 12, and a part 7 </ b> A of an oil pan provided below the crankcase are attached to the main body. 5), some auxiliary equipment such as exhaust mufflers (not shown) are excluded.

  The radiator 11 is disposed in a condenser section 28 described later, the air cleaner 12 is disposed outside the rear end surface of the frame 2 as shown in FIGS. Along the back panel 4, it is disposed at the outer lower position. Further, a part (bottom surface portion) 7A of the oil pan provided at the lower part of the crankcase is overhanged so as to extend downward from the bottom surface of the frame 2 that is framed in a rectangular shape as shown in FIG. Arranged. A diffusion plate 26 is provided behind the air cleaner 12 disposed outside the rear end surface of the frame 2 for diffusing and discharging the cooling air flowing through the apparatus.

  Further, on the front end side of the frame 2, a capacitor 13, a radiator 11, a pair of brackets 27 (see FIGS. 2 to 4) projecting so as to overhang forward from both sides of the front end surface of the frame 2. A capacitor section 28 in which the capacitor fan 14 and the like are disposed is provided. The condenser section 28 is provided with a heat exchange guard 29 provided with a number of ventilation openings at the front end, and a refrigeration cycle is configured on the rear side so as to face the condenser fan 14, and a refrigerant compressor A condenser 13 that condenses and liquefies the high-temperature and high-pressure refrigerant gas discharged from the condenser 9 is installed. Further, a radiator 11 that cools the cooling water of the water-cooled sub-engine 7 is installed on the rear side of the condenser 13. The cooling water from 3 is circulated.

  The condenser 13 is constituted by a rectangular parallel flow heat exchanger, and as shown in FIGS. 2 and 4, superheat is performed by introducing and cooling the superheated refrigerant gas discharged from the refrigerant compressor 7. The heat exchanger was divided into two heat exchangers: a first condenser 13A constituting the region portion and a second condenser 13B constituting the condensation region portion for introducing and condensing the refrigerant gas cooled by the first condenser 13A. It is configured.

  The first capacitor 13A and the second capacitor 13B are configured such that the refrigerant flow paths are in communication with each other, and the refrigerant that has flowed into the first capacitor 13A flows through the inside thereof and then flows into the second capacitor 13B. On the ventilation path of the condenser fan 14, the second condenser 13 </ b> B is disposed substantially vertically on the upstream side of the ventilation path of the condenser fan 14, and the first condenser 13 </ b> A is substantially horizontal toward the downstream side in the ventilation direction. It is arranged. A fan shroud 30 is provided between the first condenser 13A and the second condenser 13B and the condenser fan 14 to guide the outside air to the cooling fan 7 through the ventilation path. The fan shroud 30 includes the condenser fan 14. A bell mouth 31 is formed around the.

  Further, the radiator 11 is disposed below the first capacitor 13A and behind the second capacitor 13B, and the condenser fan 14 is disposed downstream thereof. As shown in FIG. 1, the radiator 11 has a front area smaller than the front area of the second capacitor 13B, and the entire area is behind the second capacitor 13B constituting the condensing region, that is, the capacitor fan. 14 is arranged downstream of the ventilation direction by 14.

  Further, among the devices constituting the condensing unit of the refrigeration apparatus mounted on the frame 2, the receiver 15 and the accumulator 16 constituted by a cylindrical container having a large outer diameter are as shown in FIGS. In addition, on the side of the electric motor 8 and on the back side of the frame 2, a part of the electric motor 8 is overhanging so as to come out of the frame 2 including the connecting pipe. Further, a control box 17 is installed on the side of the electric motor 8 and on the front side of the frame 2 so as to be out of the frame 2.

  In the above, both the receiver 15 and the accumulator 16 are installed overhanging outside the frame 2, but at least one of them may be installed overhanging. In addition, devices such as an oil separator, a dryer, and a sight glass (not shown) other than the receiver 15 and the accumulator 16 are disposed in a space around the compressor 9, the electric motor 8, the receiver 15, the accumulator 16, and the like.

  Further, as described above, the capacitor section 28 is provided overhanging forward from the front end surface of the frame 2, and in addition to this, the air cleaner 12 is provided overhanging rearward from the rear end surface of the frame 2. The width dimension which is the dimension in the front-rear direction is greatly reduced. Further, the receiver 15 and the accumulator 1 are installed overhanging outside the frame on the back side of the frame 2, and the control box 17 is installed outside the frame on the front side of the frame 2 as shown in FIGS. In this way, the frame 2 is moved inward to reduce the depth dimension.

  Further, as shown in FIG. 5, a part (bottom surface portion) 7 </ b> A of the oil pan provided at the lower crankcase of the sub-engine 7 is disposed so as to overhang downward from the bottom surface of the frame 2. The dimension in the height direction is reduced. Thus, the frame 2 is miniaturized by bringing the box members 2A to 2L of the frame 2 that is framed in a rectangular shape to the inside and reducing the width dimension, the depth dimension, and the height dimension, respectively. .

  Then, the outer panel such as the front panel 3, the rear panel 4, the upper panel 5 and the bottom panel 6 described above is directly or via a plurality of stays projecting outward from the frame 2 with respect to the frame 2 described above. And the outside panel covers the outside of all devices except for some devices such as the capacitor section 28 and the like installed overhanging from the frame 2 and the frame 2 to the outside of the frame.

With the configuration described above, according to the present embodiment, the following operational effects can be obtained.
The sub-engine type transport refrigeration apparatus 1 is driven by the sub-engine 7 when the vehicle is traveling. When the sub-engine 7 is driven and its rotation speed becomes equal to or higher than the predetermined rotation speed, the one-way centrifugal clutch 18 is connected, and the power of the sub-engine 7 is transmitted to the clutch pulley 19 and the motor shaft 8A. In this case, since the electric motor 8 is not supplied with power, the motor shaft 8A is idling, and the power from the sub-engine 7 is directly transmitted to the condenser fan 14 directly connected to the tip of the sub-engine 7 via the motor shaft 8A. Is done. As a result, the condenser fan 14 rotates, sucks outside air through the heat exchanger guard 29, and ventilates the condenser 13 (the first and second condensers 13 </ b> A and 13 </ b> B and the radiator 11).

  When the clutch pulley 19 is rotated, the power of the sub-engine 7 is transmitted to the pulleys 20 and 21 via the drive belt 22 and the refrigerant compressor 9 and the alternator 10 are driven. The DC power generated by rotating the alternator 10 is used as a power source for an evaporator unit, a controller and a starter motor of the sub engine 3 installed in a freezer (not shown), and the evaporator fan motor of the evaporator unit is used as a power source. Driven to ventilate the air in the freezer to the evaporator.

  Similarly, when the refrigerant compressor 9 is rotationally driven, a low-pressure refrigerant gas is sucked from the refrigeration cycle side, compressed, and discharged to the refrigeration cycle side. This refrigerant gas is a high-temperature and high-pressure superheated gas, and flows into the first capacitor 13A after the lubricating oil in the gas is separated by an oil separator. The refrigerant gas that has flowed into the first condenser 13A is heat-exchanged with the outside air that is ventilated by the rotation of the condenser fan 14 to become saturated gas, and then flows into the second condenser 13B and is cooled by the outside air to be condensed and liquefied.

  After this liquid refrigerant is stored in the receiver 15, it circulates through a dryer or sight glass, is supplied to the evaporator via an expansion valve provided on the evaporator unit side, and cools and evaporates the air in the freezer circulated to the evaporator. Gasify. The inside of the freezer is cooled to a predetermined temperature by this cooling air. The evaporated gasified refrigerant is again sucked into the refrigerant compressor 9 through the accumulator 16, and the cooling operation is performed by repeating the same cycle thereafter.

  On the other hand, when loading or stopping the vehicle for a break or the like at night, the sub-engine 7 is stopped. During this time, by connecting the electric motor 8 to an external commercial power source, the refrigeration apparatus 1 is switched to a motor drive operation using the electric motor 8 as a drive source. When the refrigeration apparatus 1 is operated by driving the electric motor 8 with a commercial power source, the electric motor 8 and the sub-engine 7 are disconnected by the one-way centrifugal clutch 18 and power is transmitted from the electric motor 8 side to the sub-engine 7 side. Is cut off. In this case, the power of the electric motor 8 is transmitted to the condenser fan 14 via the motor shaft 8A, and is also transmitted to the refrigerant compressor 9 and the alternator 10 via the clutch pulley 19, the drive belt 22 and the pulleys 20, 21. , The condenser fan 14, the refrigerant compressor 9, and the alternator 10 are driven. Thereby, the cooling operation can be performed in the same manner as described above.

  During the cooling operation described above, the condenser 13 of the refrigeration apparatus 1 and the radiator 11 of the sub-engine 7 that drives the refrigeration apparatus 1 are cooled via the outside air that is ventilated by a single condenser fan 14 that is shared. It has become so. Generally, the temperature of the superheated refrigerant gas discharged from the refrigerant compressor 9 is higher than the cooling water temperature of the sub-engine 7, and the refrigerant condensing temperature is lower than the cooling water temperature of the sub-engine 7. Therefore, even if the radiator 11 is installed behind the second condenser 13B constituting the condensing region and the condenser fan 14 is shared, the function of the radiator 11 is sufficiently fulfilled.

  The outside air that has circulated through the condenser 13 and the radiator 11 is blown out backward by the condenser fan 14, and further circulates around the electric motor 8, the refrigerant compressor 9, the alternator 10, the sub-engine 7, and the like, and then blows out from the rear end of the frame 2. Then, it collides with the diffusion plate 26 and is dispersed and discharged in all directions.

  In the sub-engine-type transport refrigeration apparatus 1 operated as described above, the frame 2 includes not only the weight of all devices mounted on the frame 2, but also the sub-engine 7, the electric motor 8, the refrigerant compressor 9, Sufficient strength and rigidity must be ensured because all devices must be supported by withstanding excitation force from drive system devices such as the alternator 10 and the condenser fan 14 and traveling vibration from the vehicle side. On the other hand, since a reduction in weight is desired, a reinforcing member or the like cannot be added unnecessarily.

  In order to satisfy the two contradicting needs of securing strength and rigidity and weight reduction, in the present embodiment, among the components, the sub-engine 7 main body, the electric motor 8 and the refrigerant compression which are drive system devices and are heavy in weight. A condenser which is a part of equipment constituting a condensing unit of a refrigerating apparatus excluding the radiator 11, the air cleaner 12, and the refrigerant compressor 9 which are auxiliary devices on the sub-engine 7 side. 13 (first capacitor 13A and second capacitor 13B) and a capacitor section 28 including a capacitor fan 14, a receiver 15, an accumulator 16, and a part (bottom surface) 7A of an oil pan that is a part of the main body of the sub engine 7. Uses a configuration in which the control box 17 or the like is installed overhanging outside the frame 2

  For this reason, the plurality of block members 2A to 2L constituting the strength member frame 2 are moved inward by an amount corresponding to the capacity of the equipment installed out of the frame 2 due to overhang. Can be miniaturized. Therefore, it is possible to achieve high rigidity by reducing the size of the frame 2 itself without using a reinforcing member, and it is possible to reduce weight, reduce material costs, etc. Cost reduction can be realized.

  Therefore, when installing the above equipment outside the frame 2 by overhanging it, it is not always necessary to put all of the above equipment outside the frame, but only a part of the above equipment is overhanging outside the frame 2 and installed. You may make it do. In other words, by installing a part of the equipment that constitutes the condensing unit of the refrigeration apparatus overhanging outside the frame 2, it is expected to increase the rigidity, reduce weight, and reduce material costs by reducing the size of the frame 2. can do.

  Moreover, as a form which overhangs some apparatuses, (1) The capacitor | condenser section 28 is installed overhanging. (2) The receiver 15 and / or the accumulator 16 is installed overhanging. (3) The radiator 11 is included in the capacitor section 28. (4) The above (1) and (2) or (2) and (3) are combined. (5) Various forms such as a combination of any of the above (1) to (4) with a part 7A of the oil pan of the sub-engine 7, the air cleaner 12, and further the control box 17 are conceivable. The same effects as above can be obtained.

  Further, by installing the radiator 11 in the capacitor section 28, the capacitor fan 14 can be shared by the radiator 11 and the capacitor 13, so that the configuration can be simplified and made compact. Further, since the condenser fan 14 is directly connected to the motor shaft 8A of the electric motor 8, even if the condenser section 28 is out of the frame 2, there is no need to change the structure and drive system of the condenser fan 14. In the capacitor section 28, a reliable cooling function and performance by the capacitor fan 14 can be ensured.

  In addition, in the present embodiment, the sub-engine 7, the electric motor 8, the refrigerant compressor 9 and the alternator 10 are integrated into a module via the pulley housing 23, and this is attached to the frame 2 as an anti-vibration rubber (anti-vibration). Means) Since the anti-vibration support is provided via 25, a base plate or the like for the anti-vibration support of the sub-engine 7, the electric motor 8, the refrigerant compressor 9, and the alternator 10 which are heavy objects can be eliminated. Further, it is possible to further reduce the size by making the frame 2 correspond to the outer shape of each device that is compactly integrated by modularization. Accordingly, it is possible to expect further improvements in effects such as an increase in rigidity of the entire refrigeration apparatus 1 and the frame 2, weight reduction, and material cost reduction.

  The electric motor 8 is directly connected to the output shaft of the sub-engine 7 via a one-way centrifugal clutch 18 that transmits only power from the sub-engine 7 side to the electric motor 8 side. Since the refrigerant compressor 9 and the alternator 10 are connected to the clutch pulley 19 provided on the side via the driving belt 22 by either the sub-engine 7 or the electric motor 8, the refrigerant compressor 9 and the alternator are connected. The configuration of the drive system that drives 10 can be simplified, and the alignment can be easily adjusted. As a result, maintenance can be facilitated, costs can be reduced, and the quality and reliability of the apparatus can be improved.

  Further, in the present embodiment, the frame 2 is entirely covered by the front panel 3, the back panel 4, the top panel 5, and the bottom panel 6 attached around the frame 2 together with the devices installed outside the frame. Has been. For this reason, the frame 2 is not exposed to the outside of the outer panel. That is, when the frame 2 is moved inward, some devices are installed overhanging outside the frame 2, and the entire outside is covered with the outer panels 3 to 6, so that the entire frame 2 inevitably becomes the outer panel. It will be arranged inside 3-6. As a result, the frame 2 is not directly exposed to the corrosive environment, and therefore its corrosion resistance can be improved.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above-described embodiment, the condenser fan 14 is configured by directly connecting the motor shaft 8A of the electric motor 8. However, the condenser fan 14 is configured by an electric fan in which a fan is provided on an independently installed motor. Also good. In addition, a capacitor section 28 is provided on the front end side of the frame 2 in the vehicle front-rear direction, and other devices are provided on the rear side thereof, but the capacitor section 28 is disposed on the rear end side of the frame 2 in the vehicle front-rear direction. It is good also as a structure which installed and arrange | positioned another apparatus in the back side (in this case, the front side of a vehicle front-back direction).

  Further, the refrigerant compressor 9 and the alternator 10 are not limited to those disposed in the upper space of the electric motor 8, but may be disposed in the side space or the like, particularly when the height dimension is limited. The arrangement in the side space is effective. In addition, the devices mounted on the frame 2 and the devices installed in an overhanging manner outside the frame 2 are not limited to the devices described in the above embodiment, but may be other sub-engine auxiliary devices or refrigeration devices. Of course, condensing unit components may be included.

It is the cross-sectional view which simplified some sub-engine type transportation refrigeration equipment concerning one embodiment of the present invention. It is a perspective view of the state which removed the outer surface panel of the sub engine type transport refrigeration apparatus shown in FIG. It is a perspective view of the state which installed the equipment provided in the frame of the frame of the sub engine type transport refrigeration apparatus shown in FIG. It is a perspective view of the state which installed the capacitor | condenser section provided outside the frame of the sub-engine type transport refrigeration apparatus shown in FIG. It is the longitudinal cross-section equivalent view which abbreviate | omitted a part of sub engine installation part vicinity of the sub engine type transport refrigeration apparatus shown in FIG. It is the longitudinal cross-section equivalent view which abbreviate | omitted a part of electric motor installation part vicinity of the sub engine type transport refrigeration apparatus shown in FIG. FIG. 2 is a schematic side view of a sub-engine, an electric motor, a refrigerant compressor, and an alternator that are modularized integrally with the sub-engine transport refrigeration apparatus shown in FIG. 1.

DESCRIPTION OF SYMBOLS 1 Sub engine type transport refrigeration equipment 2 Frame 3 Front panel 4 Rear panel 5 Upper panel 6 Bottom panel 7 Sub engine 7A Part of oil pan 8 Electric motor 8A Motor shaft 9 Refrigerant compressor 11 Radiator 13 Condenser 14 Condenser fan 15 Receiver 16 Accumulator 18 One-way centrifugal clutch 19 Clutch pulley 22 Drive belt 23 Pulley housing 25 Anti-vibration rubber (anti-vibration means)
28 Capacitor section

Claims (9)

A sub-engine-type transport refrigeration in which at least a sub-engine and an electric motor for driving a refrigerant compressor and a condensing unit component device of a refrigeration apparatus including the refrigerant compressor are installed on a rectangular frame. In the device
The sub-engine main body, the electric motor, and the refrigerant compressor are installed in the frame, and a part of the condensing unit constituting device excluding the refrigerant compressor is out of the frame and overhangs. Installed,
Some of the condensing unit constituent device is a capacitor section including a capacitor and condenser fan, the sub-engine-powered, characterized in that said capacitor section is provided with the overhang is issued outside the frame of the frame Refrigeration equipment for transportation.   2. The sub-engine transport refrigeration apparatus according to claim 1, wherein the condenser section is installed overhanging on one end side of the frame that is framed in a rectangular shape.   3. The sub-engine transport refrigeration apparatus according to claim 1, wherein the condenser section is provided with a radiator for the sub-engine that is cooled via the condenser fan. 4.   4. The sub-engine transport refrigeration according to claim 1, wherein the condenser fan is configured by a fan directly connected to a motor shaft of the electric motor or an electric fan installed independently. 5. apparatus. 2. A part of the condensing unit component device is an accumulator and / or receiver, and the accumulator and / or receiver is placed out of the frame and overhangs. A sub-engine type transport refrigeration apparatus according to any one of claims 1 to 4. The portion of the oil pan is provided under the sub-engine body, according to any one of claims 1 to 5, characterized in that it is installed in overhang issued outside the frame of the frame Sub-engine refrigeration equipment for transportation.   The sub-engine main body, the electric motor, and the refrigerant compressor are integrally coupled to the sub-engine main body via a pulley housing, and the refrigerant compressor is installed on the pulley housing. The sub-engine-type transport refrigeration apparatus according to any one of claims 1 to 6, wherein the sub-engine type transport refrigeration apparatus is integrally formed as a module and supported by the frame through vibration isolation means.   The electric motor is directly connected to the output shaft of the sub engine via a one-way centrifugal clutch that transmits only power from the sub engine side to the electric motor side, and is provided on the driven side of the one-way centrifugal clutch. The sub-engine type transport refrigeration apparatus according to claim 7, wherein the refrigerant compressor is connected to a clutch pulley via a driving belt so as to be driven by either the sub-engine or the electric motor. .   9. The frame according to any one of claims 1 to 8, wherein the frame is entirely covered with an outer panel attached to the frame together with the devices and components installed outside the frame. Sub-engine refrigeration equipment for transportation.

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