JPH0278880A - Motor mounting structure for refrigerating device for container - Google Patents

Abstract

PURPOSE:To permit the mounting structure of a motor, which shows sealing property by a packing regardless of the dimensional allowance of an opening, by constituting the packing having a tapered surface slanted toward the fitting direction of the motor. CONSTITUTION:When a motor 9 is mounted, the internal peripheral surface of a first packing 48 is secured to the external peripheral surface of a motor at first and, then, the external peripheral surface of a second packing 49 is secured to the internal peripheral surface of the opening 43 of a back plate 24. The external peripheral surface of said first packing 48 is fitted to the internal peripheral surface of the second packing 49 while contacting it slidingly to the direction of the shaft 47 of the motor 9 whereby the motor 9 is mounted onto the opening 43 of the back plate 24. In this case, the first packing 48 is provided with a first taper surface 48a, slanted and thinned toward the inside of a container, on the external peripheral surface thereof while the second packing 49 is provided with a second taper surface 49a, slanted so as to be coinciding with said first taper surface 48a substantially, on the internal peripheral surface thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a motor mounting structure for an inside fan of a inside unit of a container refrigeration system installed in each container, such as a container for shipping by sea.

(Prior Art) Generally, in this type of container refrigeration equipment, as disclosed in, for example, Japanese Utility Model Application Publication No. 58-196776,
The front plate is the inside of the container box, and each face plate other than the front plate is the outside of the casing, and the approximately vertical middle part of the casing is divided by a partition plate into an upper inside unit and a lower outside unit. The inside unit houses at least an evaporator and an inside fan, while the outside unit houses at least a condenser, an outside fan, and a compressor. The inside fan is arranged on the back plate of the casing so as to send air from the inside air intake port provided at the upstream end of the inside unit to the inside air outlet provided at the downstream end. It is removably attached to the shaft of the motor, which extends substantially parallel to the motor. In this case, the air sucked in by the fan inside the refrigerator via the evaporator from the air inlet on the inside of the front panel is blown out from the air outlet on the inside of the front panel, and then flows downward inside the container box (inside the refrigerator). The air is then circulated upwards and sucked in again from the air intake port inside the refrigerator. In addition, in the outside unit, heat is exchanged with the condenser using the air outside the container box sucked in by the outside fan.

Conventionally, the motor mounting structure of such a container refrigeration system has been such that the motor is mounted on a substantially horizontal axis of the motor that passes through the inside unit in the inside and outside directions (direction perpendicular to the front and back plates). An internal fan is installed, and an opening for the approximately cylindrical motor is provided on the back plate so that the motor can be installed and removed from the outside of the internal unit (container box) to inspect or replace the motor. There are some that are designed to improve maintainability during maintenance (see Japanese Utility Model Publication No. 18285/1985).

Note that the opening is closed off from the outside of the refrigerator inner unit (outer side of the refrigerator) by a service lid that substantially matches the shape of the opening.

By the way, a substantially circular opening may be provided in the back plate, and a substantially cylindrical motor may be fitted and attached to the opening. In this case, a packing having a substantially annular cross section is interposed between the inner circumferential surface of the opening and the outer circumferential surface of the motor, and this packing provides a seal between the inner circumferential surface of the opening and the outer circumferential surface of the motor. Improvements are being made.

(Problem to be Solved by the Invention) However, in the case where the motor is attached to the opening in the back plate as described above, when the opening in the back plate becomes smaller due to dimensional tolerances, the inner circumferential surface of the packing and the outer circumferential surface of the motor become smaller. Since there is no gap, the packing cannot be interposed between the inner circumferential surface of the opening and the outer circumferential surface of the motor. Furthermore, if the opening in the back plate becomes large due to dimensional tolerances, a gap will be created between the inner circumferential surface of the packing (inner circumferential surface of the opening) and the outer circumferential surface of the motor. As a result, the insulation near the opening of the back plate decreases, allowing heat from outside the refrigerator (outside the inner unit) to enter the refrigerator (inside the inner unit), increasing the heat load inside the inner unit. There's a problem.

The present invention has been made in view of the above points, and an object of the present invention is to provide a seal with the packing regardless of the dimensional tolerance of the opening by configuring the packing with a tapered surface inclined in the direction of insertion of the motor. The objective is to reduce the heat load inside the refrigerator unit by making possible a motor mounting structure that exhibits excellent performance.

(Means for Solving the Problems) In order to achieve the above object, first, the means taken by the invention according to claim (1) is to install the front plate (20) in a container box as a motor mounting structure of a container refrigeration system. Inside (A) of (1) and each face plate (except for the front plate (20))
The casing (21) to (24) is the outer side (6) of the refrigerator.
3) is divided by a partition plate (4) into an upper inner side unit (5) and a lower outer side unit (6), and the inner side unit (5) is equipped with at least an evaporator ( 11) and an inside fan (10), while at least a condenser (12), an outside fan (13), and a compressor (14) are housed in the outside unit (6).
). Then, the inside fan (10) is
The casing ( 3 ) is mounted on the shaft (47) of the motor (9) passing through the rear plate (24) of the casing (3) in a substantially horizontal direction, and a removable opening ( 43). Further, the motor (9) has an annular first tapered surface (48a) provided on the outer peripheral surface thereof, the first tapered surface (48a) tapering toward the inside (A) of the refrigerator.
While fixing the packing (48), the opening (4)
A second packing (49) having a substantially annular cross section and having a second tapered surface (49a) that substantially coincides with the first tapered surface on the outer circumferential surface of the first packing (49) is fixed to the inner circumferential surface of the first packing (3). 48
) and the second packing (49) are fitted together using their first and second tapered surfaces (48a) and (49a).

Moreover, the means taken in claim (2) is such that the outer circumferential surface of the motor (50) is a first tapered surface (48a) having a substantially truncated conical shape that tapers toward the inner side (A) of the refrigerator. That is.

(Function) With the above configuration, in the invention according to claim (1), when attaching the motor (9), first, the inner circumferential surface of the first packing (48) is fixed on the outer circumferential surface of the motor (9). On the other hand, the outer circumferential surface of the second gasket (49) is fixed to the inner circumferential surface of the opening (43) of the back plate (24). Then, the outer circumferential surface of the first packing (48) (motor (9)) is aligned with the inner circumferential surface of the second packing (49), and the shaft (47) of the motor (9)
) direction (inside the refrigerator (A)), the motor (9) is inserted into the back plate (24) opening (
43).

In that case, the outer circumferential surface of the first packing (48) is provided with a first tapered surface (48a) that tapers toward the inside of the refrigerator, and the inner circumferential surface of the second packing (49) is provided with a first tapered surface (48a) that tapers toward the inside of the refrigerator. A second tapered surface (49a) is provided that is inclined in a direction that substantially coincides with the first tapered surface (48a) (the diameter of the inner circumferential surface is inclined so that the diameter becomes smaller toward the inner side of the refrigerator). As a result, the fitted state (gap) between the first gasket (48) and the second gasket (49) is controlled by the motor (9) (first gasket).
Put the packing (4g) into the opening (43) of the back plate (24).
(The second gasket (49)) can be adjusted by moving it toward the inside of the refrigerator (A) as appropriate, and the motor (9)
(first gasket (48)) into the opening (24) of the back plate (24)
43) (Second packing (49))
), the fit between the first tapered surface (48a) and the second tapered surface (49a) becomes stronger. Therefore, the opening (43) of the back plate (24) becomes smaller due to dimensional tolerances, and the inner peripheral surface of the second packing (49) and the motor (9) (
Even if the gap between the outer peripheral surface of the first packing (48) and the outer circumferential surface of the opening (43) disappears, the first and second packing (4g) and (49) are connected to the outer circumferential surface of the motor (9) and the inner circumferential surface of the opening (43). They can be interposed between each other. In addition, the back plate (24
) is enlarged due to dimensional tolerances, so that the inner circumferential surface of the second packing (inner circumferential surface of the opening (43)) and the outer circumferential surface of the motor (9) (first packing (48)) There are no gaps between them.

In addition, since the inside fan (10) is installed on the shaft (47) of the motor (9) that passes through the back plate (24) in a substantially horizontal direction, the inside fan (10) is The dimension (distance between the front plate (20) and the back plate (24)) is only the width of the inside fan (10).

Moreover, in the invention according to claim (2), since the outer peripheral surface of the motor (50) is the first tapered surface (48a) having a substantially truncated conical shape that tapers toward the inner side (A) of the refrigerator, A seal (first seal (48)) is attached to the outer peripheral surface of the motor (50).
), and the motor (9) can be installed by sliding the outer circumferential surface of the motor (9) against the inner circumferential surface of the second gasket (49) on the inside of the refrigerator (A). done by doing. Therefore, only the second gasket (49) is required as a gasket.

In addition, the outer circumferential surface (first tapered surface (48a)) of the motor (9)
) is inclined toward the inside of the refrigerator (A), and the diameter becomes larger toward the outside of the refrigerator (6), so the radiant heat generated in the motor (50) is transferred to the outside of the refrigerator (6), which has a larger diameter. The radiant heat of the motor (9) is positively guided, and the radiant heat of the motor (9) is smoothly radiated from the outside surface (6) of the refrigerator.

(Effect of the invention) As described above, according to the invention according to claim (1), the inside (A) of the first packing (48) fixed to the motor (9)
A direction in which the first tapered surface (48a) that tapers toward The inside of the refrigerator (
By fitting the first tapered surface (48a) and the second tapered surface (49a) in sliding contact with A), the fitting between the first tapered surface (48a) and the second tapered surface (49a) can be adjusted.
The closer they are, the stronger the fit will be. As a result, even if a dimensional tolerance occurs in the opening (43) of the back plate (24), the first
And the second packing (48) and (49) are connected to the motor (
9) can be interposed between the outer peripheral surface of the opening (43) and the inner peripheral surface of the opening (43), and a gap can be formed between the first tapered surface (48a) and the second tapered surface (49a). This makes it possible to install the motor (9) in a way that prevents heat from entering the outside of the refrigerator (6) and exhibits the sealing properties of the first and second gaskets (48) and (49). The heat load inside the unit (5) can be reduced. Furthermore, the inside fan (10), which is installed on the shaft (47) of the motor (9) that passes through the back plate (24) in a substantially horizontal direction, has a width corresponding to the width of the inside fan (10). It is possible to aim for

Further, according to the invention according to claim (2), the motor (50
) is a first tapered surface (48a) having a substantially truncated conical shape that tapers toward the inside (A) of the refrigerator, so the outer peripheral surface of the motor (50) is connected to the second gasket (49). )
The motor (50) is installed by fitting the second tapered surface (49a) onto the inner side (A) of the refrigerator while making sliding contact with it, and only the second gasket (49) is required, reducing the number of parts. Motor (50)
The installation will be done smoothly.

Moreover, the radiant heat generated inside the motor (50) is actively guided and radiated to the outside of the motor (50), the diameter of which increases as it goes toward the outside of the refrigerator (6). The influence of heat on the inner side unit (5) is suppressed as much as possible, and the heat dissipation of the motor (50) can be improved.

(First example) Embodiments of the present invention will be described below based on the drawings.

2 to 4 show an embodiment of a container refrigeration system using the motor mounting structure according to the invention of claim (1),
(1) is a container box, (2) is a refrigeration device, and the refrigeration device (2) is installed so as to seal one end opening (opening surface) of the container box (1). (3) is an aluminum casing of the refrigeration device (2), and a front plate (20) (described later) of the casing (3) is attached to the container box (1).
) is the inside of the refrigerator (A), and each face plate (21) to (24) (explained later) except this front plate (20) is the outside of the refrigerator (6).
That's what I'm saying. Furthermore, a partition plate (4) is provided approximately at the center in the vertical direction inside the casing (3), and the partition plate (4) separates the upper refrigerator inner unit (5) and the lower refrigerator outer unit ( 6).

The casing (3) of the inside unit (5) is made of aluminum or synthetic resin with a heat insulating material (7) such as a foam material interposed on the outside (6) surface (back plate (24)). It is formed by a housing (8), and motors (9), (9), inside fans (10), (10), and an evaporator (11) are housed in the inside unit (5), respectively. . On the other hand, the above-mentioned outside unit (
6) houses a condenser (12), an outside fan (13), a compressor (14), and the like. The evaporator (11), condenser (12) and compressor (14)
), etc. are connected by refrigerant piping (not shown) so that refrigerant can circulate.

The casing (3) has a front plate (20
), and the top plate (21) and bottom plate (22) on the outside of the refrigerator (6).
(Partition plate (4)), both side plates (23), (23),
It consists of a back plate (24). At the top of the front plate (20), there is provided an elongated compartment air inlet (25) extending in the horizontal direction (in the left-right direction in FIG. 2), and at the bottom of the front plate (20), there is provided a A long and narrow inside air outlet (26) is provided that extends into the refrigerator. In the casing (3) of the inside unit (5), an air passage (27) is provided which connects the inside air intake port (25) and the inside air outlet (26). , the air passage (
27), the air from the inside air intake port (25), which is the upstream end of the refrigerator, is sent to the inside air outlet (26), which is the downstream end.

In addition, the above casing (3) (inside unit (5))
An evaporator chamber (30) is provided approximately in the center between the top plate (21) and the bottom plate (22). Further, the outer end of the upper surface (top plate (21)) of the evaporator chamber (30) is connected to the outside (outside of the container box (1)) via the inside air intake port (25). A hole (31) is provided. The evaporator chamber (30) includes the evaporator (1) described above.
1) is provided. The effective length of the evaporator (11), that is, the longitudinal direction of the suction surface (32) is about 1 meter (for example, about two-thirds of the conventional one disclosed in Japanese Utility Model Application Publication No. 58-196776). The length is . Further, the evaporator (1) is provided with the suction surface (32) inclined upward so as to face the hole (31) of the top plate (21).

Then, the inside air intake port (25) and the hole (3
The air inside the container box (1) that has passed through the evaporator (11) via the evaporator (11) is turned into drain water by heat exchange with the evaporator (11) and drips downward. Drain water is stored in a drain pan (34) that is located below the evaporator (11) and is formed in a substantially V shape and also serves as a bottom plate (22) (partition plate (4)).

In addition, the other end of a drain pipe (-35), one end of which opens outside the container box (1), is connected to the lowest and substantially central part of the drain pan (34), and the other end of the drain pipe (-35) is connected to the lowest part of the drain pan (34). Drain water container box (1)
It is being discharged to the outside.

On the left and right sides of the evaporator chamber (30) (air passage (27)), the lower end portions are connected to the inside air outlet (26),
(26) respectively connected to downstream air passages (40).
, (40) are provided extending downward. Between the evaporator chamber (30) and the downstream air passage (40) (only the right side will be explained), there are abbreviated shielding plates (41) attached to the left and right sides of the evaporator (11). It is provided. There is a gap (4) between the lower surface of the shielding plate (41) and the drain pan (34) (bottom plate (22)).
2), and the air inside the container box (1), which has passed through the evaporator (11) and has become low-temperature conditioned air through heat exchange with the evaporator (11), passes through the gap (42). The air is guided to the downstream air passageway (40) through the air passageway.

Furthermore, the inside fan (10), (10) is
They are arranged at the upper ends of each of the downstream air passages (40) downstream of the evaporator (11) and on the left and right sides. Openings (43), (
43) are provided respectively. Each of the inside fans (10) is a sirocco fan covered from the outside by fan casings (44), (44), and each fan casing (44) has an inlet (44a) approximately at its center. In addition, an air outlet (44b) is provided in the rotational direction of each internal fan (10). The conditioned air (air) guided through the gap (42) in the casing (3) by each of the internal fans (1o) is sucked in from the suction port (44a), and then is sucked in from the air outlet (44b). ) from the inside air outlet (26) through the downstream air passage (4o) through H steels (45) installed at predetermined intervals on the bottom (1a) of the container box (1). inside the container box (1) (
Conditioned air is blown out in a circular manner from the bottom of the refrigerator (inside the refrigerator) to the top.

A substantially disc-shaped metal flange (9a) is provided on one end surface side (outside the refrigerator (6)) of each of the motors (9), and the flange (9a) is secured by bolts (not shown).
Each opening (43) of the back plate (24) is closed from the outside. In addition, the above flange (9a
) has scattered fins (46) recessed toward the inside (A) so that the outer surface is uneven.
,... are provided extending in two directions perpendicular to the center direction and sandwiching the flange (9a), and the surface area on one end surface side of the flange (9a) is reduced by the fins (46),... is enlarged to efficiently radiate the radiant heat of the motor (9) to the outside of the refrigerator (6).

As shown in enlarged detail in Fig. 1, the refrigerator side fan (10) (since they have the same structure, only one will be explained)
is the opening (4) of the back plate (24) of the casing (3).
3) The shaft (47) of the motor (9) passes through the shaft in a substantially horizontal direction.
It is removably attached to the The motor (9) has a cylindrical shape, and the inner circumferential surface of a first gasket (48) having an annular cross section is fixed onto the outer circumferential surface of the motor (9). The first packing (48) is provided with a first tapered surface (48a) whose outer circumferential surface tapers toward the inner side (A) of the refrigerator. Further, the outer circumferential surface of a second gasket (49) having a substantially annular cross section is fixed to the inner circumferential surface of the opening (43) of the back plate (24). The inner circumferential surface of the second packing (49) has a first tapered surface (
A second tapered surface (48a) that is inclined in a direction that substantially coincides with
9a) is provided.

Then, the first tapered surface (4) of the first packing (48)
8a) and the second tapered surface (49a) of the second packing (49).
) are designed to fit into each other.

In addition, in the above-mentioned refrigerator outside unit (6), the refrigerator outside fan (1
3), the air outside the b-antenna box (1) exchanges heat with the condenser (12), which is heated to a high temperature.

Next, the operation and effect of the above embodiment will be explained. When installing the motor (9), first, while fixing the inner circumferential surface of the first packing (48) on the outer circumferential surface of the motor (9),
The outer circumferential surface of the second gasket (49) is fixed to the inner circumferential surface of the opening (43) of the back plate (24). Then, the outer circumferential surface of the first packing (4g) (motor (9)) is placed against the inner circumferential surface of the second packing (49).
7) The motor (9) is attached to the opening (43) of the back plate (24) by slidingly fitting it in the direction (inside the refrigerator (A)).

In that case, the outer circumferential surface of the first packing (48) is provided with a first tapered surface (48a) that tapers toward the inside of the refrigerator, and the inner circumferential surface of the second packing (49) is provided with a first tapered surface (48a) that tapers toward the inside of the refrigerator. A second tapered surface (49a) is provided that is inclined in a direction that substantially coincides with the first tapered surface (48a) (so that the diameter of the inner circumferential surface becomes smaller toward the inner side (A) of the refrigerator). . As a result, the fitted state (gap) between the first seal (48) and the second seal (49) is controlled by the motor (9).
(first gasket (48)) into the opening (24) of the back plate (24)
43) (Second packing (49))
), the motor (9) (first gasket (48)) can be adjusted by moving the motor (9) (first gasket (48)) to the opening (43) (second gasket (49)) of the back plate (24) on the inside of the refrigerator (A). ), the closer the first tapered surface (48a) and the second
The fit with the tapered surface (49a) becomes stronger. Therefore, the opening (43) of the back plate (24) becomes smaller due to dimensional tolerances, and the inner peripheral surface of the second packing (49) and the motor (
9) Even if the gap between the outer circumferential surface of the first packing (48) and the outer circumferential surface of the first packing (48) is eliminated, the first and second packing (48) and (49) are connected to the outer circumferential surface of the motor (9) and the inner circumference of the opening (43). They can be interposed between the two surfaces. In addition, the back plate (2
The opening (43) of 4) is enlarged due to the dimensional tolerance, so that the inner circumferential surface of the second packing (inner circumferential surface of the opening (43)) and the outer circumferential surface of the motor (9) (first packing (4g)) There are no gaps between them. As a result, the intrusion of heat from the outside of the refrigerator (6) is blocked and the first and second packings (48
), (49) shows the sealing performance of the motor (
9) mounting structure is now possible, so the inside unit (
5) The heat load can be reduced.

In addition, since the inside fan (10) is installed on the shaft (47) of the motor (9) that passes through the back plate (24) in a substantially horizontal direction, the inside fan (10) is The size (distance between the front plate (20) and the back plate (24)) is only the width of the refrigerator inner fan (10), and the refrigerator inner unit (5) can be made thinner.

(Second Embodiment) FIGS. 6 and 7 show a second embodiment of the present invention according to claim ('2J), in which a tapered surface is provided on the outer peripheral surface of the motor. Note that the same parts as in the above embodiment are given the same reference numerals, and detailed explanation thereof will be omitted.

That is, in this embodiment, the outer circumferential surface of the motor (50) is formed into a substantially truncated conical shape that tapers toward the inner side (A) of the refrigerator to form the first tapered surface (48a).

Then, the first tapered surface (48a) is connected to the back plate (24).
) is fitted into the second tapered surface (49a) of the second gasket (49) fixed to the opening (43) of the second gasket (49), so that the outer circumferential surface of the motor (50) directly connects to the second gasket (49) (second tapered surface ( 4
9a)).

In this case, since the outer circumferential surface of the motor (50) is the first tapered surface (48a) having a substantially truncated conical shape that tapers toward the inside (A) of the refrigerator, the outer circumferential surface of the motor (50) is (No need to fix the first packing (4g)),
The motor (9) is attached by fitting the outer circumferential surface of the motor (9) into the inner circumferential surface of the second packing (49) while slidingly contacting the inner circumferential surface of the refrigerator (A). Therefore, only the second packing (49) is required, and the motor (50) can be smoothly attached while reducing the number of parts.

In addition, the outer circumferential surface (first tapered surface (48a)) of the motor (9)
) is inclined toward the inside of the refrigerator (A), and the diameter becomes larger toward the outside of the refrigerator (6), and the metal flange (9a
), the surface area is expanded by providing fins (46) on the outer surface of the motor (50). ) The radiant heat of the motor (9) is smoothly radiated from the surface. As a result, the influence of the radiant heat of the motor (50) on the air-conditioned air inside the storage unit (5) is suppressed as much as possible, and the heat dissipation of the motor (50) can be effectively improved. .

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention.
The figure is a sectional view taken along the line 1-1 in Figure 2, Figure 2 is a longitudinal sectional front view of the container box with the front plate removed, and Figure 3 is a vertical sectional view of the container box with the front plate removed.
The figure is a sectional view taken along the line ■--■ in FIG. 2, FIG. 4 is a perspective view of the first packing, and FIG. 5 is an explanatory diagram showing the procedure for installing the motor. 6 and 7 show a second embodiment of the present invention; FIG. 6 is a diagram corresponding to FIG. 1, and FIG. 7 is a diagram corresponding to FIG. 5. (1) Container box, (3) Casing, (4) Partition plate, (5) Inside unit, (6) Outside unit, (9), (50)...
・Motor, (9a)...flange, (10)...inside fan, (11)...evaporator, (12)...condenser, (13)...outside fan, ( 14)...Compressor, (20)...Front plate, (21)...Top plate, (
22)...Bottom plate, (23)...Side plate, (24)...
・Back plate, (25)...Inner chamber air intake port, (26)・
...Inside air outlet, (43)...Opening, (47
)...Shaft, (48)...First packing, (48a)
...First tapered surface, (49)...Second packing, (
49a)...Second tapered surface, (A)...Inner side, (
6)...Outside the refrigerator. 2 others Figure 4 Figure 1 Figure 5 Figure 7 Figure 6

Claims (2)

[Claims] (1) The front plate (20) is the inner side (A) of the container box (1), and each face plate (21) except the front plate (20)
) to (24) as the outside (B) of the casing (3)
A partition plate (4) substantially in the middle in the vertical direction is divided into an upper inside unit (5) and a lower outside unit (6), and the inside unit (5) has at least an evaporator (11). ) and an inside fan (10), while the outside unit (6) houses at least a condenser (12), an outside fan (13), and a compressor (14). Inside fan (10
) is arranged so that the air from the inside air intake port (25) provided at the upstream end of the inside unit (5) is sent to the inside air outlet (26) provided at the downstream end. It is mounted on the shaft (47) of the motor (9) that passes through the rear plate (24) of the casing (3) in a substantially horizontal direction, and the rear plate (24) of the casing (3) has a mounting plate for removing the motor (9). A first tapered surface (48a) tapering toward the inside (A) of the refrigerator is provided on the outer peripheral surface of the motor (9). A first packing (48) having an annular cross section is fixed to the inner peripheral surface of the opening (43).
A second tapered surface (49a) substantially coincident with the tapered surface (48a).
) is fixed to the inner circumferential surface of the annular second packing (49), and the first packing (48) and the second packing (49) are connected to each other's first and second tapered surfaces (48).
A) A motor mounting structure for a container refrigeration system, characterized in that the motor mounting structure is fitted by (a) and (49a). (2) The outer peripheral surface of the motor (9) has a first tapered surface (48
The motor mounting structure for a container refrigeration system according to claim (1), which is a).