JPH0278877A - Arrangement and structure of refrigerating device for container - Google Patents

Abstract

PURPOSE:To reduce a resistance in a machine and thin an inside unit by a method wherein an inside fan is arranged aside an evaporator, arranged in an air passage, at the downstream side of air stream while a shaft for a motor is provided substantially horizontally so as to be extended into a direction from the inside to the outside of a casing. CONSTITUTION:Air in the inside A of a container, which passed through an evaporator from an inside air suction port 25 at the upper side of a front panel 20 through an opening 31 at the outer end of the ceiling plate 21 of an evaporator chamber 30 in an air passage 27, is sucked from the suction port 44b of a fan casing 44 at the side of a downstream side air passage 40 by two sets of inside fans 10 arranged on the shafts of motors, which extend substantially horizontally in a direction from the inside to the outside of the container, at the left and right sides of the downstream side of the evaporator 11 through a gap 42 in a casing 3. Air-conditioning air, sent out of an outlet port 44a into the downstream side air passage 40 in an inside unit 5, is sent out of an inside air outlet port 26 at the lower end of the front panel 20 into a container box 1 through a H-steel 46.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an arrangement structure of a refrigeration system for a container, which is installed in each container, such as a container for marine transportation, for example.

(Prior art) Conventionally, the layout structure of this type of container refrigeration equipment is as follows:
For example, as disclosed in Japanese Utility Model Application Publication No. 58-196776, the front plate is the inner side of the container box, and each face plate except the front plate is the outer side of the container box, and a partition plate is formed approximately in the middle in the vertical direction of the casing. The inner unit is divided into an upper inner unit and a lower outer unit, and the inner unit houses at least an evaporator and an inner fan (for example, a propeller fan), while the outer unit houses at least a condensate fan. Contains the container, outside fan, and compressor. The front panel is provided with an inside air inlet for sucking air into the container box and an inside air outlet for blowing air out into the container box, and the inside unit is provided with an inside air intake. An air passage is provided that communicates the opening with the inside air outlet, and the inside fan is connected to the back plate (front plate) of the casing below (downstream side) of the evaporator arranged in the air passage. It is provided on the shaft of the motor that extends approximately parallel to the motor. Further, the evaporator is arranged so that the suction surface through which air passes is substantially horizontal.

In this case, the air sucked in by the inside fan from the inside air intake port at the top of the front panel via the evaporator is blown out from the inside air outlet at the bottom of the front panel, and then is blown out from the inside air outlet at the bottom of the front panel. (inside) is circulated from the bottom to the top and sucked in again from the inside air intake port. Also,
Below the inside fan, that is, below the evaporator, there is a drain pan with a size that roughly matches the shape of the bottom of the evaporator. The drain water that is separated from the inside (circulated air) and drips downward is stopped, and this drain water is discharged to the outside of the container box via a drain vibrator that has one end connected to the drain pan. There is. In the outside unit, heat is exchanged with the condenser by the air outside the container box sucked in by the outside fan.

(Problem to be Solved by the Invention) However, in the above-mentioned conventional system, the inside fan is disposed below the evaporator, so the drain water in the air dripping from the evaporator flows into the inside fan and the shaft of the fan. (motor shaft), and this drain water is directly applied to the motor shaft during defrost operation (
Ice adheres to the stopped fan and motor shaft during defrosting operation, etc., and forms ice, causing the motor shaft to stick or causing the fan to become unbalanced due to ice adhering to the fan.
This ice adhering to the fan increases the fatigue of the motor and the load on the bearings, thereby shortening the lifespan of the fan and motor.

Therefore, in order to solve the above-mentioned problem, the inside fan and motor were placed above the evaporator (upstream side) to prevent the drain water dripping from the evaporator from touching the inside fan. It is possible to do so.

However, in this layout, air passes through the evaporator as it is forced by the inside fan, so the airflow collides with the drain pan located below the evaporator, causing the air to flow through the evaporator (inside unit). ) There is a problem that internal resistance increases.

In addition, since the inner side fan is installed on the shaft of the motor that extends approximately parallel to the front plate, the width direction of the inner side unit (distance between the front plate and the back plate) is required to correspond to the diameter of the fan. The width of the inner unit in the thickness direction (distance between the front plate and the back plate) becomes thick.

Furthermore, in the case where air is forced from above the evaporator by an internal fan, high-velocity air is blown only on a part of the suction surface of the evaporator where the circumferential part of the internal fan is located. Uniform heat exchange between the air and the surface (evaporator) is not achieved, resulting in poor heat exchange efficiency by the evaporator.

The present invention has been made in view of these points, and its purpose is to appropriately improve the arrangement layout of the motor shaft and to provide a fan on the downstream side of the evaporator to reduce drain water. The aim is to reduce internal resistance by preventing direct contact with the air, make the internal unit thinner, and improve the heat exchange efficiency of the condenser by sucking air at a uniform wind speed to the evaporator. It is something.

The aim is to improve the layout of the evaporator, to further reduce the thickness of the inside unit, and to further improve the heat exchange efficiency of the evaporator.

(Means for Solving the Problem) In order to achieve the above object, first, the means taken by the invention according to claim (1) is to connect the front plate (20) to the inside (A) of the container box (1). None, each of the face plates (21) to (24) other than the front plate (20) is the outer side (B) of the casing (3), and the upper inner side unit is separated by a partition plate (41) approximately in the middle in the vertical direction of the casing (3). (5) and the lower outside unit (6), respectively.
) is equipped with at least an evaporator (11) and an inside fan (
10), and the outside unit (6) is assumed to have an arrangement structure of a container refrigeration system that houses at least a condenser (12), an outside fan (13), and a compressor (14). The front panel (20) is provided with an inside air intake port (25) for sucking air into the container box (1) and an inside air outlet (26) for blowing out air into the container box (1). The inside air intake port (25) is provided in the inside unit (5).
) and the inside air outlet (2B) are connected to each other.
27). Furthermore, the inside fan (10) is connected to an evaporator (11) disposed in the air passage (27).
downstream and laterally of the airflow of the motor (9).
) is arranged substantially horizontally so as to extend in the direction of the inside and outside of the casing (3).

Moreover, the means taken in claim (2) is such that the evaporator (IL) is arranged at an angle.

Furthermore, the means taken by claim (3) is that the evaporator (11)
The suction surface (32) is arranged at an angle so as to face the inside air suction port (25).

(Function) With the above configuration, in the invention according to claim (1), the container box ( 1) The air inside (inner side (A)) of the evaporator (1) is
■) on the downstream side of the chamber (casing (
The substantially horizontal shaft (43) of the motor (9) extends in a direction perpendicular to the front plate (20) and rear plate (24) of
) is sucked into the air passage (27) inside the casing (3), that is, inside the inside unit (5), by the inside fan (10) arranged above. The air, which has become low-temperature conditioned air through heat exchange with the evaporator (11), is blown out into the container box (1) from the inside air outlet (26) of the front plate (20).

In this way, the inside fan (10) is connected to the evaporator (11).
Since it is arranged on the shaft (43) of the motor (9) on the downstream side of the evaporator (11), First, the drain water separated from the air by heat exchange in the evaporator (11) is reliably prevented from directly hitting the inside fan (10), and the drain pan (
Drain water is stored in 34). Moreover, since the air is drawn into the evaporator (11) by the inside fan (10), the air flow impinges on the drain pan (34) like the one that was forcing the air into the evaporator (11), causing the machine to (Inside unit) (5)) Internal resistance will not increase.

In addition, since the inside fan (10) is arranged on the shaft (43) of the substantially horizontal motor (9) extending in the direction outside and outside of the refrigerator, it is possible to This means that the distance (distance) only needs to be the width of the fan.

Furthermore, since the air that has passed through the evaporator (11) is sucked into the air passage (27) by the inside fan (10), the inside fan (10) is Air with high wind speed is not blown only to a part of the suction surface (32) of the evaporator (11) where the circumferential portion is located, and the suction surface (32) of the evaporator (11)
Air is sucked in evenly at a uniform wind speed, and the heat exchange efficiency of the evaporator (11) is increased.

Further, in the invention according to claim (a), since the suction surface (32) of the evaporator (11) is arranged at an angle, the short side of the suction surface is similar to an evaporator in which the suction surface is provided in a substantially horizontal state. Compared to the case where the width of the refrigerator inner unit (5) (refrigeration equipment (2)
) will save space both inside and outside the refrigerator.

In addition, the evaporator (11) can be constructed such that the suction surface is substantially reduced by, for example, shortening the effective length of the suction surface (32), that is, shortening the length of the suction surface (32) in the longitudinal direction and increasing the length of the suction surface (32) in the transverse direction. The area of the suction surface (32) can be expanded compared to an evaporator installed horizontally, and the heat exchange efficiency of the evaporator (11) can be further improved. Moreover, if the longitudinal length of the suction surface (32) is shortened, the longitudinal direction of the drain bank 34) can be shortened in accordance with the longitudinal length of the suction surface (32).

Furthermore, in the invention according to claim (3), the air from the inside air intake port (25) is
The evaporator (11), which is arranged at an angle with the suction surface (32) facing the air, will sufficiently suck the liquid without any support.

(Effect of the invention) As described above, according to the invention according to claim (1), the inside air intake port (2
The low-temperature conditioned air that has passed through the evaporator (11) from the evaporator (11) is directed onto the shaft (43) of a substantially horizontal motor (9) extending in the direction of the inside and outside of the refrigerator on the downstream side of the evaporator (11). After being sucked in by the disposed inside fan (10), it is blown out to the inside of the refrigerator (A) from the inside air outlet (26) at the bottom of the front plate (20). This makes it possible to avoid dripping of drain water from the evaporator (11), reduces internal resistance compared to a system that forces air into the evaporator, and requires only the width of the machine. Inside fan (10)
This allows the internal unit (5) to be made thinner. Moreover, the air is evenly drawn into the suction surface (32) of the evaporator (11) at a uniform wind speed,
11) The heat exchange efficiency can be improved.

Further, according to the invention according to claim (2), the evaporator (11
Since the suction surface (32) of the refrigerator inner unit (5) is arranged at an angle, compared to an evaporator in which the suction surface is approximately horizontal, the space of the refrigerator inner unit (5) in the direction of the inside and outside of the refrigerator is considerably saved. ) can be made even thinner. Moreover,
For example, the heat exchange efficiency can be further improved by using an evaporator (11) in which the length of the suction surface (32) is shortened in the longitudinal direction and the length of the suction surface (32) is increased in the transverse direction to increase the area of the suction surface (32). In addition, it is possible to reduce the size of the drain pan (34) according to the length of the suction surface (32) in the longitudinal direction.

Furthermore, according to the invention according to claim (3), the evaporator (11) is arranged at an angle with the suction surface (32) facing the inside air suction port (25). Since the air from (25) is sufficiently sucked in without support, the heat exchange efficiency of the evaporator (11) can be effectively improved, and the air circulation efficiency within the container box (1) can be improved. can be achieved.

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

1 to 3 show the arrangement structure of a container refrigeration system according to an embodiment of the present invention, in which (1) is a container box, (2) is a refrigeration system, and the refrigeration system (2) is It is installed so as to seal one end opening (opening surface) of the container box (1).

Further, (3) is an aluminum casing of the refrigeration device (2), and a front plate (20) (described later) of this casing (3) is attached to the container box (1).
The inside of the refrigerator (A) is defined as the inside of the refrigerator (A), and each of the face plates (21) to (24) (described later) excluding this front plate (2o) is defined as the outside of the refrigerator (B). Furthermore, a partition plate (4) having a substantially U-shaped cross section is provided in the vertically central portion of the casing (3), and the partition plate (4) separates the inner side unit (5) from above. It is divided into a lower outside unit (6).

The casing (3) is particularly suitable for the inside unit (5).
(B) side (bottom plate (22), back plate (24)) and the outside (A) side (front plate (24)) of the outside unit (6).
It is formed by a housing (6) with a heat insulating material (7) such as glass fiber or foamed synthetic resin interposed between the lower part of the inner unit (5) and a motor (9).
), (9), inside fan (1,0), (10),
and an evaporator (11) are housed therein. On the other hand, inside the refrigerator outside unit (6), a condenser (12),
A fan outside the refrigerator (13), a compressor (14), and the like are housed. Then, the evaporator (11) and the condenser (
12), the compressor (14), and the like 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 (B)
(Top surface of partition plate (4)), both side plates (2B), (23
) and a back plate (24). At the upper part of the front plate (20), there is provided an elongated refrigerator inner air intake port (25) extending in the horizontal direction (in the left-right direction in FIG. 2), and
At the lower part of the front plate (20), there is provided an elongated storage interior air outlet (2B) extending in the transverse direction. In the casing (3) of the inside unit ('5), the inside air intake port (25) and the inside air outlet (26) are provided.
) is provided with an air passageway (27) that communicates (connects) between the two.

In addition, the above casing (3) (inside unit (5))
An evaporator chamber (30) is located approximately at the center between the top plate (21) and the bottom plate (22), that is, at the upstream end of the air passage (27).
is provided. 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). An opening (31) is provided. The evaporator chamber (30) is provided with the evaporator (11) described above. 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 . Furthermore, the above evaporator (
11) is provided such that the suction surface (32) is inclined upward so as to face the opening (31) of the top plate (21). The air inside the container box (1) that has passed through the evaporator (11) through the inside air intake port (25) and the opening (31) has moisture contained in the air in the evaporator ( 11) becomes drain water and drips downward, and the bottom plate (22) formed in a substantially V shape located below the evaporator (11) (partition plate (4)
) Drain water is stored in the drain pan (34). The other end of a drain vibe (35), one end of which opens outside the container box (1), is connected to the lowest, substantially central portion of the drain pan (34), and the other end of the drain vibe (35) is connected to the lowest central portion of the drain pan (34). Water is being discharged to the outside of the container box (1).

Further, on the downstream side of the air passage (27) located on the left and right sides of the evaporator chamber (30), there are downstream sides whose lower ends are respectively connected to the inside air outlet (2B), (2B). Air passages (40) and (4G) 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) is provided. And the shielding plate (41)
and the drain pan (34) (bottom plate (22))
A gap (42) is provided between the container box (1) and the air inside the container box (1), which passes through the evaporator (11) and becomes low-temperature conditioned air through heat exchange with the evaporator (11). Air is directed to the downstream air passageway (40) via the gap (42).

The motors (9), (9) are provided at the upper ends of the downstream air passages (40) on the left and right sides (downstream side) of the evaporator (11), and the motors (9) (9
) is connected to the inside and outside directions of the casing (3) (the front plate (20) and the back plate (20)
4) and extends substantially horizontally in the direction perpendicular to 4).

Furthermore, the refrigerator side fans (10) and (10) are attached to the shaft (43) of each of the motors (9), respectively.

Each of the inside fans (10) is a centrifugal turbo fan, and the Tama inside fan (10) has an air outlet (44a) that opens in the direction of rotation and a suction port (44b) that opens near the center of rotation. A fan casing (44) having
, (44), and the inside fan (
10), the gap (42) in the casing (3) is
) is sucked from the suction port (44b) of the fan casing (44), and is drawn through the air outlet (44b) of the fan casing (44).
It is designed to be blown out from 4a). Furthermore, one end surface (back plate (24) side) of each of the motors (9) has an opening (
45) from the outside, and each motor (9) is connected to the flange (9a).
By casing (3) (container box (1))
It is attached from the outside. In addition, on the bottom part (1a) inside the container box (1), there is an H steel (4) extending in a direction perpendicular to the front plate (20) of the casing 1.
B), . . . are laid at predetermined intervals.

In addition, in the above-mentioned refrigerator outside unit (6), the refrigerator outside fan (1
3) The air outside the container box (1) sucked in heat exchanges with the condenser (12), which becomes hot.

Next, the functions and effects of the above embodiment will be explained.
The container box (1) passed through the evaporator (11) through the opening (31) at the outer end of the top plate (21).
) (inner side (A)) of the evaporator (11) downstream from the evaporator (11).
) The substantially horizontal shaft (46) of each motor (9) extends in a direction perpendicular to the front plate (20) and rear plate (24) of the
) two internal fans (10) each placed on top
The fan casing (44) on the downstream side air passage (40) side through the gap (42) in the casing (3).
is sucked from the suction port (44a). The conditioned air blown out from the outlet (44b) of the fan casing (44) to the downstream air passage (40) in the inside unit (5) is the inside air at the lower end of the front plate (20). Conditioned air is blown out from the outlet (26) through the H steel (46) so as to circulate from the lower part of the container box (1) to the upper part.

In this way, each warehouse fan (10) is connected to the evaporator (11).
) downstream side air passages (4o) on the left and right sides,
The shaft (4) of the motor (9) is attached to the upper end of the motor (40).
3) Since the Tama inner fan (1o
) is installed downstream of the evaporator (11), the drain water separated from the air by heat exchange in the evaporator (11) is not directly applied to the internal fan (10) and motor. is reliably avoided, and drain water is stored in a substantially V-shaped drain pan (34) provided below the evaporator (11). Moreover, since air is drawn into the evaporator (11) by the internal fan (10), the drain pan (3)
4), the internal resistance of the machine (two knits (5) on the inner side of the refrigerator) does not increase due to collision of the airflow, and the internal resistance of the machine can be reduced.

In addition, since the refrigerator inside fan (1o) is arranged on the shaft (43) of the almost horizontal motor (9) extending in the inside and outside directions of the refrigerator, it (distance) is only required to be the width of the fan. Moreover, the suction surface (32) is
) are facing each other, and the evaporator (11) is arranged at an angle, so that the inner unit can be opened by the length of the short side of the suction surface in the force direction, like an evaporator with the suction surface substantially horizontal. The space of the inside unit (5) (refrigeration device (2)) in the inside and outside directions of the refrigerator can be saved compared to the case where the width in the inside and outside directions of the refrigerator is required. As a result, the internal unit (5) (
The thickness of the refrigeration device (2)) in the direction of the inside and outside of the refrigerator is considerably thinner, and the internal unit (5) can be effectively made thinner.

(5) The thickness of the refrigerator (refrigeration device (2)) in the outside and outside directions can be reduced. As a result, the internal unit (5) (refrigeration device (2)) can be effectively made thinner in the outward and outward directions.

Further, the air from the inside air inlet (25) is supplied to the evaporator (11), which is arranged at an angle with the suction surface (32) facing the inside air inlet (25). It will be sucked into the container box (
1) It is possible to improve the air circulation efficiency within the interior.

Furthermore, since the air that has passed through the evaporator (11) is sucked in by each internal fan (10), each internal fan (10) is different from the one that forced air into the evaporator.
) of the suction surface (32) of the evaporator (11) is located.
) The air with high wind speed is not blown (pushed) into only a portion of the suction surface (32) of the evaporator (11).
Air is sucked in evenly at a uniform wind speed. Moreover, the air from the inside air inlet (25) is not supported by the evaporator (11) which is arranged at an angle with the suction surface (32) facing the inside air inlet (25). By sufficiently passing the suction surface (32) of the evaporator (11), the effective length direction, that is, the longitudinal length of the suction surface (32) of the evaporator (11) can be shortened to about twice that of the conventional part, and the short direction length of the suction surface (32) can be reduced. By increasing the length of the suction surface (32), the area of the suction surface (32) can be expanded compared to an evaporator in which the suction surface (32) is provided in a substantially horizontal state. As a result, it is possible to effectively improve the heat exchange efficiency of the evaporator (11). Moreover, since the air from the inside air suction port (25) is sufficiently sucked in without any support, it is possible to improve the air circulation efficiency within the container box (1).

Moreover, by shortening the longitudinal length of the suction surface (32) of the evaporator (11), it is possible to downsize the drain pan (34) according to the longitudinal length of the suction surface (32) of the evaporator (11). can be achieved.

Furthermore, each refrigerator fan (10) provided on the horizontal axis (43) of each motor (9) is connected to a flange provided on one end surface (back plate (24) side) of each motor (9). (3a)
By casing (3) (container box (1))
Since they are attached from the outside side, each motor (9) and each inside fan (10) can be easily inspected or replaced from the outside side of the casing (3) (container box (1)). Therefore, it is possible to improve the maintainability of each motor (9) and each inside fan (10).

In the above embodiment, the inside fans (10) and (10) were provided on the left and right sides of the evaporator (11), respectively.
Of course, an inside fan may be provided on one side of the evaporator.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an enlarged perspective view of the main part of FIG. 2, FIG. 2 is a longitudinal sectional front view of the container box with the front plate removed, and FIG. It is a sectional view taken along the line ■-■ in the figure. (1) Container box, (2) Freezer, (3) Casing, (4) Partition plate, (5
)... Inside unit, (6)... Outside unit, (9)... Motor, (10)... Inside fan,
(Work 1)...Evaporator, (Work 2)...Condenser, (13
)...Outside fan, (14)...Compressor, (20
)...Front plate, (21)...Top plate, (29)...
Bottom plate, (23)...Side plate, (24)...Back plate,
(25)... Inside air intake port, (26)... Inside air outlet, (27)... Air passage, (32)...
・Suction surface, (43)...Shaft, (A)...Inner side, (
B)...Outside the refrigerator.

Claims (3)

[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). The front plate (20) is provided with an inside air intake port (25) for sucking air into the container box (1) and an inside air outlet (26) for blowing out air into the container box (1). An air passage (27) is provided in the inside unit (5) that communicates the inside air inlet (25) with the inside air outlet (26), and the inside fan ( 10) is arranged downstream and laterally of the air flow of the evaporator (11) arranged in the air passage (27), and the shaft (43) of its motor (9) is arranged in the casing (3). An arrangement structure for a container refrigeration device, characterized in that it is installed substantially horizontally so as to extend in the interior and exterior directions of the container. (2) The arrangement structure of a container refrigeration system according to claim (1), wherein the suction surface (32) of the evaporator (11) is arranged at an angle. (3) The arrangement structure of the container refrigeration system according to claim (1), wherein the evaporator (11) is arranged at an angle with the suction surface (32) facing the inside air suction port (25). .