JPH0730985B2 - Refrigeration equipment for containers - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a refrigerating device for a container, such as a container for ocean shipping, which is installed in each container, and more particularly to a refrigerating device mounted in a refrigerating container for storing perishables. Regarding the device.

(Prior Art) Generally, in this type of container refrigerating apparatus, the front plate of the casing faces the inside of the container box, and the face plates except the front plate face the outside of the container. The casing is divided into an upper compartment inside unit and a lower compartment outside unit by a partition plate provided at a substantially middle portion in the vertical direction, and a refrigerant circuit of a refrigeration system (for example, hot gas bypass system) is provided in the inside compartment unit. Among the elements, at least the evaporator and the inside fan (for example, a propeller fan) for blowing the inside air to the evaporator are housed, while at least the condenser and the outside air to the condenser in the outside unit. And a compressor for blowing the air from the inside of the refrigerator, and the inside fan blows the air from the inside air outlet provided in the casing. The inside air that has undergone heat exchange with the evaporator is sent from the inside air outlet provided in the casing into the container box. In this case, in order to maintain the freshness of the perishables, it is necessary to store the perishables under optimum conditions according to the type. For example, when the fresh food is fruits and vegetables, the temperature range is such that low temperature damage does not occur, and in the case of fish meat whose taste changes due to freezing, the temperature range in which it does not freeze is further frozen. In the case of fish meat that does not have any problem, a temperature range corresponding to the fish meat, and an optimum temperature condition for each fresh food are required.

Under these demands, perishables are transported to remote areas such as overseas, and especially for fruits and vegetables whose freshness declines extremely quickly, if the transportation time becomes long, the freshness will be maintained only by setting the temperature conditions. The current situation is that it is impossible to transport as-is.

Therefore, in view of this point, there has been an idea to hold the freshness not only by setting the temperature condition but also by adjusting the humidity. That is, a container for transporting perishables, which is provided with a humidifying device, is drawing attention.
In this case, since the humidity (relative humidity) required in the container is generally as high as 85 to 95%, the performance of the humidifier and the demands on its peripheral equipment are also considerably high. As a conventional humidifier for a container refrigeration system, for example, as disclosed in Japanese Utility Model Laid-Open No. 63-63671, a hose for spraying is provided above a water tank in which a vibrator is provided at the bottom of a case. Is installed, and the blower fan guides the spray generated by the ultrasonic waves emitted from the vibrator into the water stored in the water tank near the water surface into the chamber. Further, the water in the water storage tank is supplied in advance before transportation, or the drain water separated from the air in the storage by heat exchange with the evaporator is collected by a pump.

Also, since fruits and vegetables, etc., of fresh produce are discharged with ethylene gas by metabolism, for example,
As disclosed in Japanese Patent Laid-Open No. 40044, an outside-air introducing pipe for introducing outside air to the upstream side of the evaporator by a pressure difference between the inside air and the inside air, and an inside air by a pressure difference between the outside air and the outside air. It is provided with an in-compartment air exhaust pipe for exhausting to the outside of the store, and while ethylene gas is exhausted to the outside of the store, the inside of the store is ventilated by introducing outside air into the store.

(Problems to be Solved by the Invention) As described above, not only the setting of temperature conditions but also the transportation of fresh fruits to a remote place by containers such as fruits and vegetables,
Since it is necessary to adjust the humidity, there are the following problems.

(I) In a container or the like for transporting fruits and vegetables (perishables) as described above, it is desirable that the installation space of the humidifier is as small as possible in order to secure a larger storage space for the transported items (fruits and fruits). The water tank in the casing needs to have a large capacity because it is difficult to supply water on the way during sea transportation, and a space for installing the water tank is required, and the humidifier cannot be made compact.

(II) Since the water tank is indispensable in the container as described above, the loading capacity of the container is reduced by the space occupied by the water tank.

(III) Since the drain water separated from the air in the storage is collected in the water tank of the humidifier, it is easy for failure due to dirt in the water tank or clogging of the water system. The maintenance is troublesome because the water tank and the water system must be cleaned after each use.

(IV) In addition to the water tank, the above humidifier requires additional components such as a pump, a vibrator, a spray hose, and a blower fan. The reliability of the parts is poor.

The present invention has been made in view of the above point, and the purpose thereof is to focus on the above-mentioned ventilating chamber,
By constructing a refrigeration system that can adjust the humidity inside the container by using the moisture contained in the outside air, the water storage layer and associated parts are not required, and the humidifier can be made compact while the container loading capacity is reduced. It is intended to expand and improve the maintainability and reliability of the humidifier.

In addition, by constructing a refrigerating device capable of adjusting the humidity inside the container according to the transported object, for example, a low humidity (relative humidity 50%) transported object such as bulbs or potatoes, or a frozen transported object such as fish meat. It also aims to expand the range of use of container refrigeration equipment by making possible container transportation.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the means taken by the invention according to claim (1) is, as shown in FIGS. 1 and 2, a casing ( 3) Front plate (20)
Facing the inside (A) of the container box (1), and arranging the face plates (21) to (24) excluding the front plate (20) facing the outside (B) of the container, respectively. (3)
Is divided into an upper compartment inside unit (5) and a lower compartment outside unit (6) by a partition plate (4) provided at a substantially middle portion in the vertical direction, and a refrigeration unit (5) is installed in the inside compartment unit (5). Among the components of the refrigerant circuit (X) of 2), at least the evaporator (9) and the inside fan (10) for blowing the inside air to the evaporator (9) are housed, while the outside unit. (6) houses at least a condenser (12), an outside-compartment fan (13) for blowing outside air to the condenser (12), and a compressor (15), and at the same time, the inside unit (5) ), The first outside air introduction for introducing outside air to the downstream side of the evaporator (9) by opening one end to the outside (B) and the other end to the downstream side of the evaporator (9) Tube (4
3) and an inside air discharge pipe (44) for discharging the inside air to the outside by opening one end to the outside (B) and the other end to the upstream side or the downstream side of the evaporator (9). And an air heat exchanger for cooling while dehumidifying the outside air in the first outside air introduction pipe (43) with the inside air in the inside air discharge pipe (44) to a predetermined humidity. 45) and the above inside fan (1
0) heat-exchanges the inside air from the inside air return port (25) provided in the casing (3) with the evaporator (9), and then the inside air and the air heat exchanger. (Four
The inside air provided in the casing (3) by mixing with the outside air from the first outside air introduction pipe (43) that is heat-exchanged in 5) and is introduced to the downstream side of the evaporator (9). It can be fed from the outlet (26) into the container box (1). And a temperature detecting means (50) for detecting the temperature of the mixed air of the inside air heat-exchanged in the evaporator (9) and the outside air heat-exchanged in the air heat exchanger (45), A refrigerating capacity control means (57) for continuously adjusting the refrigerating capacity of the refrigerating apparatus (2) in response to the output of the temperature detecting means (50), and a humidity detecting means (60) for detecting the humidity of the inside air. An air amount adjusting means (61) for adjusting the outside air amount introduced from the first outside air introducing pipe (43), and the humidity detecting means (6).
0), and humidity control means (63) for controlling the air amount adjusting means (61) so that the humidity in the refrigerator becomes the set humidity.

Further, the means taken by claim (2) is that the first outside air introducing pipe (43) extends in the longitudinal direction of the evaporator (9), and a hole portion for blowing outside air in the longitudinal direction. (47), ... is designed to have many openings.

Further, the means taken by claim (3) is that the air amount adjusting means (61) is driven by a fan motor (41) in the first outside air introduction pipe (43) or inside the air discharge pipe (44). The fan motor (41) is equipped with a pressure fan (42)
Has a low-speed mode in which the outside air amount is small and a high-speed mode in which the outside air amount is large, and controls the humidity control means (63) to operate the air amount adjusting means (when the inside humidity is higher than the set humidity). 61) is configured to continuously switch to the low speed mode and to the high speed mode when the internal humidity is lower than the set humidity.

Further, in the means taken by claim (4), the air amount adjusting means (61) is driven by a fan motor (41) in the first outside air introducing pipe (43) or inside air discharging pipe (44). The fan motor (41) is equipped with a pressure fan (42)
However, the OFF mode that does not require the amount of air in the refrigerator and the ON mode that requires
And a rotation speed variable mode in which the rotation speed is continuously variable according to the required amount of air in the storage, the humidity control means (63) When it is higher than the above, the air amount adjusting means (61) is set to the OFF mode
When the internal humidity is lower than the set humidity, the mode is continuously switched to the ON mode and the rotation speed variable mode is switched depending on the low internal humidity.

Further, the means taken by claim (5) has an air amount adjusting means (61) which has a closed mode in which the air amount in the refrigerator is unnecessary and an open mode in which the air amount in the refrigerator is required, and the required amount of the air amount in the refrigerator. The opening / closing device (66) has an opening degree variable mode in which the opening degree can be continuously adjusted according to the above, and the humidity control means (63) controls the air amount adjusting means (61) when the inside humidity is higher than the set humidity. ) Is closed mode, and when the internal humidity is lower than the set humidity, the open mode is continuously switched to the variable opening mode according to the low internal humidity.

Further, the means taken by claim (6) is a second outside air introduction pipe (81) for introducing outside air to the upstream side of the evaporator (9).
And the air amount adjusting means (61) is provided on the second outside air introduction pipe (71), the first outside air introduction pipe (43) and the inside air discharge pipe (44), and (2) A first mode in which the outside air introduction pipe (81) is closed and the first outside air introduction pipe (43) and the inside air discharge pipe (44) are opened;
A second mode in which the outside air introduction pipe (43) is closed and the second outside air introduction pipe (81) and the inside air discharge pipe (44) are opened, and the first and second outside air introduction pipes ( 43), (81) and a third mode for closing the inside air discharge pipe (44).

(Operation) With the above configuration, in the invention according to claim (1), when the package in the container box (1) is a fruit or vegetable requiring low temperature and high humidity (for example, 90% relative humidity), the temperature is high. When high-humidity outdoor air is introduced into the air heat exchanger (45) (in the humidifier (40)) from the first outdoor air introduction pipe (43),
The temperature of the outside air is controlled to an appropriate humidity (relative humidity) by heat exchange with the cooled inside air in the inside air discharge pipe (44) by the air heat exchanger (45), and becomes a low temperature to some extent. Thereafter, this outside air is introduced to the downstream side of the evaporator (9) and mixed with the inside air cooled via the evaporator (9) by each inside fan (10), A low-temperature and high-humidity mixed air is born, and this mixed air is blown out from the inside air outlet (26) into the container box (1), so that the temperature and humidity inside the container box (1) can increase ) Is kept in accordance with.

In that case, when the temperature of the mixed air on the downstream side of the evaporator (9) detected by the temperature detecting means (50) changes with respect to the set temperature, that is, when the temperature of the mixed air falls or rises above the set temperature, the temperature detecting means The refrigerating capacity of the refrigerating apparatus (2) is continuously adjusted by the refrigerating capacity control means (57) according to the output of (50), and the temperature of the mixed air is controlled to be the set temperature. The inside air whose temperature is properly controlled and the outside air that has undergone heat exchange with this inside air are mixed, and the temperature inside the container box (1) is in a low temperature state depending on the fruits and vegetables. Will always be kept.

Further, when the relative humidity of the inside air detected by the humidity detecting means (60) changes, that is, decreases or increases, the humidity control means (63) introduces a high humidity inside the first outside air introduction pipe (43). Air amount adjusting means (61) for adjusting the outside air amount
Is adjusted (increased or decreased) to the set humidity, the humidity inside the container (in the container box (1)) is controlled, and the humidity in the container box (1) is constantly maintained in a high humidity state according to fruits and vegetables. Be drunk

In this way, the temperature of the mixed air of the inside air and the outside air is continuously adjusted by the refrigerating capacity control means (57) according to the output of the temperature detection means (50) detecting the temperature. , The air amount adjusting means (61) according to the output of the humidity detecting means (60) detecting the humidity of the mixed air, the humidity controlling means (63)
Since it is controlled by, the temperature change and the humidity change of the mixed air are surely controlled (controlled) according to the temperature and humidity conditions of the inside and outside air, and the inside of the container box (1) is always in a low temperature / humidification ventilation state. Will be kept.

In addition, since the fruits and vegetables (transported goods) in the container box (1) are kept at a low temperature and high humidity, the water tank required for the conventional humidifier is not required, and the humidifier (4
The installation space of 0) can be reduced.

Further, as described above, the refrigerating device (2) (humidifying device (40))
Since the water tank is not required, the loading capacity of the container can be increased by the space occupied by the water tank.

Moreover, unlike the case where the drain water is collected in the water tank of the humidifier, a failure due to dirt in the water tank or clogging of the water system does not occur, and the occurrence of such a failure is prevented. Maintenance such as cleaning the water tank and the water system after each use can be eliminated.

Further, as described above, in the humidifying device (40), not only the water tank but also ancillary parts such as a pump, a vibrator, a spray hose and a blower fan are not required, and the cost can be kept low by reducing the number of parts. , The reliability of each of the small number of parts will be improved.

In the invention according to claim (2), a hole (47) for blowing outside air is provided in the longitudinal direction of the first outside air introduction pipe (43) extending in the longitudinal direction of the evaporator (9). Since a large number of openings are provided, the outside air blown out from the first outside air introduction pipe (43) (each hole (47)) and the inside air that has undergone heat exchange in the evaporator (9) Mixing will be quick and smooth.

In the invention according to claim (3), the humidity control means (6
3), when the inside humidity is higher than the set humidity, the air amount adjusting means (61) (fan motor (41)) is set to the low speed mode where the outside air amount is small, and the inside humidity is higher than the set humidity. When the temperature is low, the high-speed mode in which the amount of outside air is large is switched respectively, so the amount of outside air flowing through the first outside air introduction pipe (43) is adjusted by the fan motor (41) to increase or decrease. Therefore, it is not necessary to separately provide the humidity control means, which is advantageous in terms of the number of parts.

In the invention according to claim (4), the humidity control means (6
3), when the humidity inside the refrigerator is higher than the set humidity, the air amount adjusting means (61) is set to the closed mode in which the outside air amount is unnecessary.
Continuously switch to the open mode, which requires the amount of air in the refrigerator when the humidity in the refrigerator is lower than the set humidity, and to the variable opening mode in which the opening can be adjusted according to the low humidity in the refrigerator, that is, the required amount. Since the pressure fan (42) (fan motor (41)) controls the amount of outside air introduced from the first outside air introduction pipe (43) in the container box (1). The relative humidity of will approach the ideal value (90%).

In the invention according to claim (5), the humidity control means (6
3), when the humidity inside the refrigerator is higher than the set humidity, the air amount adjusting means (61) is set to the closed mode in which the outside air amount is unnecessary.
When the internal humidity is lower than the set humidity, the open mode, which requires the internal air amount, and the open variable mode, in which the opening can be adjusted according to the low internal humidity, that is, the required amount, are continuously switched. Therefore, in combination with the suction action of the outside air by the fan motor (41) (pressurizing fan (42) into the first outside air introduction pipe (43), the first outside air introduction The amount of outside air introduced from the pipe (43) is further finely controlled, and the relative humidity in the container box (1) approaches the ideal value.

Further, in the invention according to claim (6), the second outside air introduction pipe (8) for introducing outside air to the upstream side of the evaporator (9).
1), the air amount adjusting means (61) provided in the first outside air introducing pipe (43) and the inside air discharging pipe (44) closes the second outside air introducing pipe (81) and 1 outside air introduction pipe (4
3) and the first mode in which the inside air discharge pipe (44) is opened, and the first outside air introduction pipe (43) is closed and the second outside air introduction pipe (81) and the inside air discharge pipe ( The second mode of opening 44) and the first and second outside air introducing pipes (43), (81)
And the third mode for closing the air discharge pipe (44) in the refrigerator, the container box (1) becomes a low temperature and high humidity state, that is, fresh food such as fruits and vegetables when the first mode is set. It becomes a suitable low temperature and humidification ventilation state. In addition, when the second mode is set, the container box (1) is in a low temperature and low humidity state, that is, a low temperature and dehumidification ventilation state suitable for bulbs, potatoes and fish meat whose taste changes due to freezing. . Further, in the above-mentioned third mode, the inside of the container box (1) is in a low temperature and low humidity state where no ventilation is performed, that is, a frozen state suitable for frozen fish meat and the like. As described above, the temperature and humidity conditions inside the container box (1) are appropriately changed according to the transported object, so that the versatility of the container box (1) can be enhanced.

(Effect of the invention) As described above, according to the invention of claim (1), the outside air having a high temperature and a high humidity is exchanged with the inside air by the air heat exchanger (45) to have an appropriate humidity. By controlling the temperature to a low temperature to a certain degree, and introducing this in-compartment air to the downstream side of the evaporator (9) and mixing with the in-compartment air downstream of the evaporator (9), a low-temperature, high-humidity mixed air Was born, and the temperature and humidity inside the container box (1) were kept at a low temperature and high humidity according to fruits and vegetables by this mixed air, and the temperature of the mixed air was detected on the upstream side of the evaporator (9). In addition to being controlled by the refrigeration capacity control means (57) according to the output of the temperature detection means (50), the outside air quantity by the air quantity adjustment means (61) is controlled by the humidity detection means (60). Humidity in the storage after being increased or decreased by the control means (63) Since it is controlled, the temperature change and the humidity change of the mixed air can be surely controlled, and the inside of the container box (1) can always be kept in a low temperature / humidification ventilation state. In addition, since the container box (1) is always kept in a low temperature / humidification ventilation state, the water tank that was required in the past is no longer required, and the installation space of the humidification device (40) can be reduced, and the container The loading capacity can be increased. Furthermore, the maintenance that was necessary to prevent the occurrence of malfunctions due to dirt in the water tank or clogging of the water system, such as when drain water was collected in the water tank of the humidifier, becomes unnecessary. be able to. In addition, not only the water tank but also the pump, vibrator, spray hose, blower fan, and other auxiliary parts are all unnecessary, and the number of parts can be reduced to reduce the cost. The reliability can be improved.

According to the invention of claim (2), the evaporator (9)
Since a large number of holes (47) for blowing outside air are opened in the longitudinal direction of the first outside air introducing pipe (43) extending in the longitudinal direction of the first outside air introducing pipe (43). ), The outside air blown out of the chamber) and the inside air passing through the evaporator (9) can be mixed quickly and smoothly.

Further, according to the invention of claim (3), when the humidity inside the refrigerator is higher than the set humidity, the humidity inside the refrigerator is set to the low humidity mode in which the outside air amount of the air amount adjusting means (61) is small. Since the humidity control means (63) is configured to switch to the high-speed mode in which the amount of outside air is large when the temperature is lower than the above, the amount of outside air in the first outside air introduction pipe (43) is equal to the fan motor (41). By this, the amount is increased or decreased, and it is not necessary to separately provide the humidity control means, so that the number of parts can be reduced.

Further, according to the invention of claim (4), when the internal humidity is higher than the set humidity, the internal humidity is set to the set humidity in the closed mode in which the internal air amount of the air amount adjusting means (61) is unnecessary. Since the humidity control means (63) is configured to continuously switch to the open mode that requires the internal air amount when the temperature is lower than the above, and to the variable opening mode according to the required amount of internal humidity, the pressurizing fan ( 42) The amount of outside air can be controlled extremely finely to bring the relative humidity in the container box (1) close to an ideal value.

Further, according to the invention of claim (5), when the internal humidity is higher than the set humidity, the internal humidity is set to the set humidity in the closed mode in which the internal air amount of the air amount adjusting means (61) is unnecessary. Since the humidity control means (63) is configured so as to continuously switch to the open mode in which the internal air amount is required and the opening degree variable mode in accordance with the required amount of internal humidity when the temperature is lower than that, the fan motor (41 ), The amount of outside air can be controlled more finely, and the relative humidity in the container box (1) can be brought closer to an ideal value.

Further, according to the invention of claim (6), a second outside air introduction pipe (71) for introducing outside air into the evaporator (9) is provided, and the second outside air introduction is provided. Tube (7
1), depending on the temperature and humidity conditions of the transported object in the container box (1) by a closing member (72) that appropriately closes or opens the first outside air introduction pipe (42) and the inside air discharge pipe (43). The air amount adjusting means (61) that can be changed to the first to third modes according to the first mode, and the low temperature / humidification ventilation state suitable for fresh produce such as fruits and vegetables in the first mode, and the bulb in the second mode. A low temperature and dehumidification ventilation state suitable for fish and meat whose taste changes due to freezing and potatoes and freezing,
The container box (1) can be expanded in versatility because it can be appropriately changed to a frozen state suitable for frozen fish meat that does not need ventilation in the third mode.

First Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

3 and 4 show an embodiment of a refrigerating apparatus for containers according to the present invention, (1) is a container box, and (2)
Is a refrigerating apparatus, and the refrigerating apparatus (2) is installed so as to seal an opening (opening surface) at one end of the container box (1). Further, (3) is an aluminum casing of the refrigeration system (2), and a front plate (20) (described later) of the casing (3) is placed inside the container box (1) (A). The face plates (21) to (24) (which will be described later) except the front plate (20) are arranged facing the outside (B) of the refrigerator. further,
A partition plate (4) having a substantially U-shaped cross section is provided at a substantially central portion in the up-down direction inside the casing (3), and the partition plate (4) allows the upper inside unit (5) and the lower inside unit (5) to be installed. It is divided into the outside unit (6).

The casing (3) is particularly suitable for the inside unit (5).
Outer side (B) surface (bottom plate (22), rear plate (24)) and outer side (A) surface (front plate (20) of the outdoor unit (6)
The lower part of the inside) is formed by a housing (8) via a heat insulating material (7) such as glass fiber or foam synthetic resin, and as shown in FIG. At least the evaporator (9) of the hot gas bypass type refrigerant circuit (X), and the evaporator (9)
Inside fan (10), (1
0) and motors (11), (11) for driving the internal fan (10) are housed. On the other hand, in the outside unit (6), a condenser (12) and a side fan (1) for blowing the air to the condenser (12) are stored.
3), expansion valve (14) as pressure reducing mechanism, and compressor (1
5) etc. are stored. The evaporator (9), the condenser (12), the expansion valve (14), the compressor (15), and the like are connected by refrigerant pipes (16) so that the refrigerant can circulate.

The casing (3) includes a front plate (20) on the inside (A), a top plate (21) on the outside (B), and a bottom plate (22).
(Upper surface of the partition plate (4)), both side plates (23) and (23), and a rear plate (24). At the upper part of the front plate (20) (upstream end of the inside unit (5)), there is provided an elongated inside air return port (25) extending in the lateral direction (left and right direction in FIG. 4), and At the lower part of the front plate (20) (downstream end of the inside unit (5)), an elongated inside air outlet (26) extending in the lateral direction is provided. Then, in the casing (3) of the inside unit (5), an air introduction passage (2 whose upstream end is connected to the inside air return port (25) is connected.
7) is provided.

An evaporator chamber (30) is provided in a substantially central portion of the casing (3) (the inside unit (5)) between the top plate (21) and the bottom plate (22), that is, in the air introduction passage (27). Has been. The evaporator chamber (30) is provided with the evaporator (9) described above. Further, the evaporator (9) is provided in an upward state so that the suction surface (9a) faces the inside air suction port (25). The air inside the container box (1) that has passed through the evaporator (9) through the inside air intake port (25) has the moisture contained in the air and the evaporator (9). Drain pan (31) which also serves as drain water due to heat exchange and drops downward, and which also serves as a bottom plate (22) (partition plate (4)) formed in a substantially V shape located below the evaporator (9). Drain water is stored by. It should be noted that the drain pan (31) is connected to the drain pipe (31) at the lowest center thereof, and the other end of a drain pipe (not shown) is connected to the outside of the container box (1). Outside the drainage water container box (1) (outside the storage)
Is being discharged to.

Then, on the left and right sides of the evaporator chamber (30), that is, on the downstream end of the air introduction passage (27), the inside unit (5) is stored.
(First air passages (32), (32) extending in the vertical direction of the (refrigeration system (2)) and comprising the left and right end portions of the front plate (20) and the rear plate (24). The upstream ends of are connected. Further, the evaporator chamber (30) and the first air passage (32)
A substantially L-shaped shield plate (33) attached to the left and right side surfaces of the evaporator (9) is provided between the shield plate (33 and the right side only). Further, a gap (34) is formed between the lower surface of the shielding plate (33) and the drain pan (34) (bottom plate (22)).
Is provided.

The motors (11), (11) are provided at the upstream ends of the air introduction passages (27) located above and to the left (right) of the evaporator (9).
And the shaft (35) of each of the motors (11) is arranged in the vertical direction (top plate (21) and bottom plate (2) of the casing (3)).
2) It extends in a direction orthogonal to the above. Further, the shaft (35) of each motor (11) has the above-mentioned inside fan (1
0) and (10) are attached respectively. Each of the inside fan (10) is a propeller fan, and the inside fan (10) circulates the inside of the container box (1) and then the evaporator (9) from the inside air return port (25). After passing through the gap (34) to the first air passageway (32), the in-compartment air that has passed through and has become low-temperature conditioned air again due to heat exchange with the evaporator (9) is introduced into the first air passageway (32). The air is blown downward into the container box (1) from the inside air outlet (26) located near the bottom plate (22) via the passage (32). Then, at the downstream end (lower end) of each of the first air passages (32), the lower end portion of the front plate (20) extends in the width direction of the inside unit (5) (refrigerator (2)). And the lower end of the back plate (24), the second air passage (36)
Upstream ends (left and right ends) of each of the first air passageway (32) and the second air passageway (36) are connected to each other through the air introduction passageway (27). ) And the air outlet (26) inside the refrigerator. The casing (3) is attached to the bottom surface (1a) of the container box (1).
T-shaped floor rails (37) extending in a direction orthogonal to the front plate (20) are laid at predetermined intervals.

Further, as shown in FIG. 6 and FIG. 7, the humidifier (40) is provided at the upper end of the inside unit (5) located on the right side in the casing (3) on the first air passage (32) side. ) Is provided. The humidifying device (40) has a pressure fan (42) (sirocco fan) driven by a fan motor (41), and a back plate (24) of the casing (3) whose one end is the outside (B) of the refrigerator. ) And the other end is an evaporator (9)
A substantially middle portion of a first outside air introduction pipe (43) which is opened downstream of the first outside air introduction pipe (43) for introducing outside air to the downstream side of the evaporator (9) by the pressure fan (42) is connected. The first outside air introducing pipe (43) is composed of an upstream first outside air introducing pipe (43a) located upstream and a downstream first outside air introducing pipe (43b) located downstream. The pressure fan (42) is attached to the downstream end of the upstream first outside-air-introduction pipe (43a), and the pressure fan (42) (upstream first outside-air-introduction Downstream end of pipe (43a) and downstream first
The upstream end of the outside air introduction pipe (43b) is connected to the humidifying device (4
0) respectively.

In the humidifier (40), one end is opened to the back plate (24) of the casing (3) and the other end is opened to the downstream side of the evaporator (9) so that the inside air is different from the outside air. A substantially middle portion of the in-compartment air exhaust pipe (44) that is discharged to the outside of the refrigerator by pressure is connected. The inside air discharge pipe (44) is composed of an upstream inside air discharge pipe (44a) located on the upstream side and a downstream inside air discharge pipe (44b) located on the downstream side. The downstream end of the internal air exhaust pipe (44a) and the downstream internal air exhaust pipe (4
The upstream ends of 4b) are connected to the humidifying device (40). Further, the humidifying device (40) includes the first
Outside air introduction pipe (43) (Upstream side first outside air introduction pipe (43
Air heat that cools the outside air inside a)) by dehumidifying it to a specified humidity by exchanging heat with the inside air inside the inside air discharge pipe (44) (upstream side inside air discharge pipe (44a)). Exchanger (4
5) is provided, and in the air heat exchanger (45), a substantially middle portion of the first outside air introduction pipe (43) and a substantially middle portion of the inside air discharge pipe (44a), that is, the upstream. Side first outside air introduction pipe (43a) (pressurizing fan (42)) downstream end and downstream side first outside air introduction pipe (43b) upstream end, and upstream side inside air discharge pipe (44a) Is connected to the downstream end and the upstream end of the downstream side internal air discharge pipe (44b).
Then, the inside air after the heat is exchanged in the evaporator (9) returning from the inside air return port (25) through the air introduction passageway (27) by the inside fan (10), and the air. After the heat is exchanged in the heat exchanger (45) and the outside air from the first outside air introduction pipe (43) introduced (blown) to the downstream side of the evaporator (9) is mixed, this mixing is performed. Air is fed from the inside air outlet (26) into the container box (1) through the first and second air passages (32) and (36). Further, the first outside air introducing pipe (43) is arranged in the left-right direction of the casing (3) (evaporator (9)
In the longitudinal direction), and a large number of holes (47) for blowing outside air having a diameter of about 15 mm are opened in the longitudinal direction. The pressure fan (42) is mounted on the shaft (46) of the fan motor (41) extending in the lateral direction of the casing (3).

Then, on the downstream side of the evaporator (9), the inside air having undergone heat exchange in the evaporator (9) and the air heat exchanger (4
A temperature sensor (50) is provided as a temperature detecting means for detecting the temperature of the mixed air with the outside air heat-exchanged in 5). In addition, the compressor (1
The refrigerant pipe (16) on the discharge side of the compressor (15) located between the condenser port (5) and the condenser (12) receives the refrigerant from the suction port (52a) on the discharge port (52b) side and the bypass port (52c). ) Side electromagnetic type three-way proportional control valve (52)
Is installed. The bypass port (52c) of the electromagnetic three-way proportional control valve (52) is connected to the upstream end of a bypass passage (53) having a downstream end opened immediately upstream of the evaporator (9), and a compressor A hot gas bypass type refrigerant circuit (X) is configured to guide the high temperature and high pressure refrigerant from (15) to the evaporator (9). Further, the electromagnetic three-way proportional control valve (52) includes a temperature controller (5
An electromagnetic coil (56) is provided which proportionally adjusts the openings of the discharge port (52b) and the bypass port (52c) of the electromagnetic three-way proportional control valve (52) by receiving the output voltage of 5).
The temperature controller (55) includes the temperature sensor (5
The output from the temperature sensor (50) is received by the electromagnetic three-way proportional control valve (52), which receives the output of the temperature sensor (50) via the temperature controller (55). When the temperature is below the set temperature, the opening of the bypass port (52c) of the electromagnetic three-way proportional control valve (52) is set to the open side.
Alternatively, refrigeration capacity control means (57) is configured to proportionally control the opening degree of the bypass port (52c) of the electromagnetic three-way proportional control valve (52) to the closed side when the temperature of the blown air is equal to or higher than the set temperature in the refrigerator. .

Further, the inside fan (1) of each air introduction passageway (27) is
A temperature sensor (60) as a humidity detecting means for detecting the relative humidity (ψ) of the indoor air on the upstream side of the evaporator (9) is provided on the upstream side of 0). In addition, the pressurizing fan (42) has a small amount of outside air introduced into the inside (A) of the inside from the first outside air introduction pipe (43) and a large amount of outside air. Is controlled by a fan motor (41) having a high speed mode, and the fan motor (41) capable of switching to each of the modes moves from the first outside air introducing pipe (43) to the inside (A) of the refrigerator. An air amount adjusting means (61) for adjusting the amount of introduced outside air is configured. A humidity controller (62) to which the output from the humidity sensor (60) is input is connected to the fan motor (41).
2) The output of the humidity sensor (60) is received, and when the internal humidity is higher than the set humidity, the air amount adjusting means (61)
Humidity control means (63) for switching the (fan motor (41)) to the low speed mode and to the high speed mode when the internal humidity is lower than the set humidity is configured.

Further, as shown in FIG. 8 and FIG. 9, the upstream end of the first outside air introducing pipe (43) and the inside air discharging pipe (44).
The upstream end of the first outside air introduction pipe (43) and the downstream end of the inside air discharge pipe (44) are opened or closed in the back plate (24) of the casing (3) whose downstream ends are respectively opened. The enabling lid member (64) is provided slidably in the vertical direction.

In the outside unit (6), the outside fan (1
Air outside the container box (1) sucked in by (3) exchanges heat with the condenser (12), which becomes hot.

Here, the temperature of the cargo in the container box (1) is high.
The case of asparagus and other fruits and vegetables under the conditions of 2.1 ° C and 90% relative humidity (ψ) will be described. First, cover the lid member (64) with the first outside air introduction pipe (43) (upstream side first chamber). The upstream end of the outside air introduction pipe (43a) and the inside air discharge pipe (4
4) Sliding upward (Figs. 8 and 9) so that both downstream ends of the (downstream-side internal air discharge pipe (44b)) are opened.
(State shown in the figure) to enable ventilation. And
As shown in Fig. 10, outside air with temperature (t ₁ ) (temperature) of 38 ° C and relative humidity (ψ ₁ ) of 50% (K point on absolute humidity (x ₁ ) shown in Fig. 10) From the first outside air introducing pipe (43) to the air heat exchanger (45) (the humidifying device (4
Introduced in 0). In this case, if the surface temperature of the air heat exchanger (45) is set to 15 ° C and the relative humidity (ψ) is set to 100% (point L shown in Fig. 10), the outside air will be the air heat exchanger. The temperature is controlled up to temperature t ₂ (23.5 ° C) so that the relative humidity (ψ) becomes 80% by heat exchange with the cooled indoor air in the indoor air discharge pipe (44) by (45). −
The outside air with the absolute humidity (x ₂ ) dehumidified by the point M on the L line, that is, Δx ₁ = x ₂ −x ₁ minute is born. Thereafter, the outside air is blown out (introduced) from the holes (42a) to the downstream side of the evaporator (9), and is cooled again by the inside fan (10) via the evaporator (9). The temperature (t ₃ ) of the indoor air (mixed air) blown into the container box (1) is 2.1 ° C, and the relative humidity (ψ ₃ ) is 90% (Fig. 10). N on absolute humidity (x ₃ ) indicated by
The absolute humidity (x ₃ ) of the air in the refrigerator is Δx ₂ = x ₃
Humidification is performed for -x ₂ minutes.

When the temperature (t ₃ ) of the mixed air detected by the temperature sensor (50) falls below 2.1 ° C, the temperature controller (5
In response to the output voltage of 5), the opening degree of the bypass port (52c) of the electromagnetic three-way proportional control valve (52) changes the refrigeration capacity control means (5
It is proportionally controlled to the open side by 7) and the temperature of the blown air is controlled so as to reach the set temperature in the refrigerator. On the other hand, when the temperature (t ₃ ) of the mixed air exceeds 2.1 ℃, the electromagnetic three-way proportional control valve (52) receives the output voltage of the temperature control (55).
The opening of the bypass port (52c) of the refrigeration capacity control means (5
It is proportionally controlled to the closed side by 7), and the temperature of the mixed air is controlled so as to reach the set temperature in the refrigerator, and the temperature is appropriately controlled by heat exchange with the evaporator (9). The inside air and the outside air that has undergone heat exchange with this inside air are mixed, and the temperature inside the container box (1) is constantly maintained at a low temperature of 2.1 ° C according to the fruits and vegetables (transportation). become.

Further, when the relative humidity (ψ ₃ ) of the indoor air on the upstream side of the evaporator (9) detected by the humidity sensor (60) becomes 90% or less, the output of the humidity controller (62) causes the fan motor (41) ( The air quantity adjusting means (61) increases the outside air quantity introduced from the first outside air introducing pipe (43) by the humidity control means (63) so that the absolute humidity (x ₃ ) is Δx.
_The mode is switched to the high speed mode so as to humidify the air by ₂ (x ₃ −x ₂ ), and the air amount adjusting means (61) is controlled to increase the amount so that the internal humidity becomes the set humidity. On the other hand, when the relative humidity (ψ ₃ ) of the inside air reaches 90% or more, the fan motor (41) is output by the humidity controller (62) and the humidity control means (63) causes the first outside air introduction pipe ( 43) is switched to the low speed mode so that the outside air amount is reduced and the absolute humidity (x ₃ ) is dehumidified by Δx ₂ minutes, and the air amount adjusting means (61 ) Is controlled so that the relative humidity in the container box (1) is constantly maintained at a high humidity of 90% according to fruits and vegetables.

Therefore, in the above embodiment, the temperature of the mixed air of the inside air and the outside air is the temperature sensor (5
0) output is continuously adjusted by the refrigeration capacity control means (57), and the outside air amount is increased or decreased according to the output of the humidity sensor (60) that detects the humidity of the mixed air. Since the air amount adjusting means (61) is controlled by the humidity controlling means (63), it is possible to reliably control (control) the temperature change and the humidity change of the mixed air according to the temperature and the humidity state of the inside and outside air. You can

Further, according to the refrigerating apparatus (2) (humidifying apparatus (40)) as described above, fruits and vegetables (transported goods) in the container box (1).
Since it is kept at a low temperature and high humidity, the water tank that was necessary for the conventional humidifier is no longer necessary, and the humidifier (40)
The installation space can be reduced, and the loading capacity in the container box (1) can be increased by the space occupied by the water tank.

Furthermore, unlike the case where the drain water was collected in the water tank of the humidifier, there is no failure due to dirt in the water tank or clogging of the water system. Therefore, it is possible to eliminate the maintenance that was required to clean the water tank and the water system after each use.

Moreover, as described above, in the humidifying device (40), not only the water storage tank but also auxiliary components such as a pump, a vibrator, a spray hose, and a blower fan are unnecessary, and the cost can be kept low by reducing the number of components. The reliability of each component, which is a small number, will be improved.

In addition, the first downstream side extending in the longitudinal direction of the evaporator (9)
Since a large number of holes (47) for blowing outside air are opened in the longitudinal direction of the outside air introduction pipe (43b), the outside air blown out from the downstream first outside air introduction pipe (43b). With this, it is possible to quickly and smoothly mix with the air in the refrigerator that has passed through the evaporator (9).

Furthermore, since the humidity control means (63) is configured by the fan motor (41) that can be switched to the low speed mode or the high speed mode, the amount of outside air introduced from the first outside air introduction pipe (43) is already present. The fan motor (41) adjusts the amount so that the amount is increased or decreased, and it is not necessary to separately provide the humidity control means, and the number of parts can be reduced.

Furthermore, both the upstream end of the upstream first outside air introducing pipe (43a) and the downstream end of the downstream inside air discharging pipe (44b) are opened (slide upward) by the lid member (64). The inside of the container box (1) is in a low temperature and high humidity state where ventilation is performed, that is, in a frozen state suitable for fresh food (particularly fruits and vegetables), while the upstream end of the upstream first outside air introduction pipe (43a) and By closing (sliding downward) the lid member (64) together at the downstream end of the downstream side air discharge pipe (44b), the inside of the container box (1) is in a low temperature and low humidity state, Since the frozen state is suitable for frozen fish meat and the like, and the inside of the container box (1) is appropriately changed according to the transported object, the versatility of the container box can be expanded.

(Modifications) The first embodiment of the present invention includes various modifications. For example, the air amount adjusting means (61) used in the above embodiment has an OFF mode in which the air amount in the refrigerator is unnecessary and an ON mode in which the air amount in the refrigerator is required, and is continuous according to the required amount of the air amount in the refrigerator. The humidity control means (63) comprises a fan motor (41) having a variable rotation speed mode in which the rotation speed is variable.
When the indoor humidity is higher than the set humidity, set the air amount adjusting means (61) (fan motor (41)) to the OFF mode,
It goes without saying that the ON mode may be continuously switched when the humidity inside the refrigerator is lower than the set humidity, and the rotation speed variable mode may be continuously switched depending on the low humidity inside the refrigerator. In this case, the fan motor (41) should finely adjust the amount of outside air introduced from the inside of the first outside air introduction pipe to bring the relative humidity (ψ) inside the container box close to the ideal value (90%). You can

Further, as shown in FIGS. 11 and 12, the downstream end of the upstream first outside air introducing pipe (43a) (the humidifying device (40)).
The upper and lower fan-shaped first vent holes (7
1), (71) and upstream first outside air introducing pipe (43
A circular fixed shutter (72) provided so as to be orthogonal to the outside air flowing through a), and rotatably supported on the upstream surface of the fixed shutter (72), and each of the first communication The substantially fan-shaped second ventilation holes (73), (7) that substantially match the pores (71).
An air amount adjusting means (61) is constituted by an opening / closing device (76) having a circular rotary shutter (75) having a stepping motor (74) and rotatable about an axis by a stepping motor (74). Then, the rotary shutter (75) is rotated by the stepping motor (74) in accordance with the output of the humidity sensor (60) to have a closing mode in which the amount of air in the refrigerator is unnecessary and an opening mode in which it is required, and Each second ventilation hole (73) of the rotary shutter (75) is connected to each first ventilation hole of the fixed shutter (72) so as to have an opening degree variable mode in which the opening degree can be continuously adjusted according to the required amount of air. By adjusting the opening degree with respect to (71), when the inside humidity is higher than the set humidity, the air amount adjusting means (1) (stepping motor (74)) is set to the closing mode, and the inside humidity is set to the set humidity. When the temperature is lower than the above, the humidity control means (63) may be configured to continuously switch to the open mode and the opening degree variable mode in accordance with the low inside humidity. In this case, coupled with the suction action of the outside air by the fan motor (41), the amount of outside air introduced from the first outside air introduction pipe (43) is further finely controlled, and the container box (1 The relative humidity (ψ) in () can be brought closer to the ideal value.

(Second Embodiment) FIGS. 13 to 22 show a second embodiment of the present invention. In this embodiment, the humidifier is improved so that not only humidification but also dehumidification can be performed. The same parts as those in the above embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

That is, in this embodiment, the second outside air introduction pipe (81) for introducing the outside air to the upstream side of the evaporator (9) is provided. Then, the outer surface of the rear plate (24) of the refrigeration system (2) that is open to the outside of the second outside air introduction pipe (81), the first outside air introduction pipe (43) and the inside air discharge pipe (44). On the side, the ends of these pipes (42), (43), (81) are closed or opened as appropriate according to the temperature and humidity conditions of the cargo in the container box (1). A member (82) is provided so as to be vertically slidable. Further, the closing member (82) is provided with an opening hole (82a).

Then, as shown in FIGS. 15, 17, and 18, the second outside air introduction pipe (81) is closed by the closing member (82) and the first outside air introduction pipe (43) and the outside The first mode in which the inner air discharge pipe (44) is opened corresponding to the opening hole (82a) of the closing member (82), and as shown in FIGS. 16, 19, and 20, the closing member First by (82)
A second one that closes the outside air introduction pipe (43) and opens the second outside air introduction pipe (81) and the inside air discharge pipe (44) corresponding to the opening hole (82a) of the closing member (82). 2 modes and 2nd
As shown in FIG. 1 and FIG. 22, the third mode in which the first and second outside air introduction pipes (43) and (81) and the inside air discharge pipe (44) are closed by the closing member (82). When the air amount adjusting means (61) having the above is constituted and the above-mentioned first mode is set, the inside of the container box (1) is in a low temperature and high humidity state, that is, fresh fruits such as fruits and vegetables as described in the first embodiment. It becomes a low temperature and humidification ventilation state suitable for objects. In addition, when the above second mode is set, in the container box (1),
High-temperature, high-humidity outside air that does not pass through the air heat exchanger (45) is introduced from the upstream side of the evaporator (9), and this outside air passes through the evaporator (9), so that the container box ( The inside of 1) is in a low temperature and low humidity state, that is, a low temperature and dehumidification ventilation state suitable for bulbs, potatoes and fish meat whose taste changes due to freezing. Further, in the above-mentioned third mode, the inside of the container box (1) is in a low temperature and low humidity state where no ventilation is performed, that is, a frozen state suitable for frozen fish meat and the like. In this way, the temperature and humidity conditions inside the container box (1) can vary depending on the package.
Since the mode is appropriately changed to the third mode, the versatility of the container box can be further expanded.

(Modifications) The second embodiment of the present invention includes various modifications. For example, as shown in FIGS. 23 and 24, the evaporator (9) is arranged on the upstream side of the inside fan (10), and the inside air outlet (26) is located near the top plate (21). The provided upper-blow-type refrigeration system (2) may be configured, and in this case, the second outside air introduction pipe (81) opening on the upstream side of the evaporator (9) is the evaporator (9). Same as the first embodiment while opening downward so that the outside air is sucked by the pressure difference between the inside air and the inside air, the pressurizing fan (42) is unnecessary and the number of parts is reduced. The action and effect of can be obtained.

Further, as shown in FIGS. 25 to 27, the closing member (8
2) in the semicircular arc, the first and second outside air introduction pipes (81), (4
3) and a circular fixed shutter (91) in which three first hole portions (91a) are associated with the outside ends of the inside air discharge pipe (44) and the fixed shutter (91). Air amount with the rotary shutter (92) that is rotatably supported on the upstream surface side and that has three second hole portions (92a) that are line (diameter) symmetrical with respect to each first hole portion (91a). As shown in FIG. 25, the air amount adjusting means (61) constitutes an adjusting means (61), and the second shutter outside air introducing pipe (81) is constituted by a rotary shutter (92) (closing member (82)). (First hole (91a)) to second hole (92a)
And the first outside air introduction pipe (43) and the inside air discharge pipe (44) (each first hole portion (91a)) are opened corresponding to each second hole portion (92a). First mode and second
As shown in FIG. 6, the rotary shutter (92) closes the first outside air introducing pipe (43) without corresponding to the second hole (92a), and the second outside air introducing pipe (81). And a second mode in which the inside air discharge pipe (44) is opened corresponding to each second hole portion (92a), and as shown in the twenty-seventh, the rotary shutter (82) allows the first and second outside air to be stored. Introductory pipes (42), (71)
And a third mode in which the inside air discharge pipe (43) is closed without corresponding to the second hole (82a).

[Brief description of drawings]

1 to 10 show a first embodiment of the present invention.
The figure is a block diagram related to refrigeration capacity control, FIG. 2 is a block diagram related to humidity control, FIG. 3 is a sectional view taken along line III-III in FIG. 4, and FIG. 4 is a container box with a front plate removed. 5 is a side view of the humidifier, FIG. 7 is a front view of the humidifier, and FIG. 8 is a cover member. A front view, FIG. 9 is a sectional view taken along line IX-IX in FIG. 8, and FIG. 10 is a moist air diagram showing characteristics of moist air. Also,
11 and 12 show a modified example of the first embodiment, FIG. 11 is a rear view of the switchgear, and FIG. 12 is a sectional view taken along line XII-XII in FIG. 13 to 22 show a second embodiment of the present invention, and FIG. 13 is a sectional view taken along line XIII-XIII in FIG.
FIG. 14 is a view equivalent to FIG. 4, FIG. 15 is an explanatory view of a refrigeration system in a humidification / ventilation state, FIG. 16 is an illustration of a refrigeration system in a dehumidification / ventilation state, and FIG. 17 is a blockage member in a humidification / ventilation state. Front view, FIG. 18 is a sectional view taken along line XVIII-XVIII in FIG.
FIG. 19 is a front view of the closing member in a dehumidifying ventilation state, and FIG.
FIG. 21 is a sectional view taken along line XX-XX in FIG. 19, FIG. 21 is a front view of the closing member in a frozen state, and FIG. 22 is XXII- in FIG.
It is sectional drawing in the XXII line. Also, Figs. 23 and 24
FIG. 23 shows a modification of the second embodiment, FIG. 23 is a view corresponding to FIG. 15, and FIG. 24 is a view corresponding to FIG. Further, FIGS. 25 to 27 also show modified examples of the second embodiment. FIG. 25 is a view corresponding to FIG. 17, FIG. 26 is a view corresponding to FIG. 19, and FIG. 27 is a view corresponding to FIG. is there. (1) …… Container box (2) …… Refrigerator (3) …… Casing (4) …… Partition plate (5) …… Inside cabinet unit (6) …… Outside cabinet unit (9) …… Evaporator (10) …… Inside fan (12) …… Condenser (13) …… Outside fan (15) …… Compressor (20) …… Front plate (21) …… Top plate (22) …… Bottom plate (23) …… Side plate (24) …… Back plate (25) …… Inside air return port (26) …… Inside air outlet (41) …… Fan motor (42) …… Pressurization fan ( 43) …… First outside air introduction pipe (44) …… Inside air exhaust pipe (45) …… Air heat exchanger (47) …… Hole (50) …… Temperature sensor (53) …… Bypass Passageway (57) …… Refrigeration capacity control means (60) …… Humidity sensor (61) …… Air amount adjusting means (63) …… Humidity control means (76) …… Switching device (81) …… Second outside Air introduction pipe (A) …… Inside the room (B) …… Outside the room (X) …… Refrigerant circuit

Claims (6)

[Claims] 1. A front plate (20) of a casing (3) is exposed to the inside (A) of a container box (1) of a container box (1), and each face plate (21) to (24) excluding the front plate (20) is stored. A partition plate (4) is provided so as to face the outside (B) and the casing (3) is provided at a substantially middle portion in the vertical direction thereof, and an upper inside unit (5) and a lower outside unit (6) are provided by a partition plate (4). ) And blows the inside air to the evaporator (9) and at least the evaporator (9) among the constituent elements of the refrigerant circuit (X) of the refrigeration system (2) in the inside unit (5). While storing the inside fan (10) for attaching, the outside unit (6) has at least a condenser (12) and an outside fan (13) for blowing outside air to the condenser (12). )
In addition to accommodating the compressor (15), one end of the inside unit (5) is opened to the outside (B) of the inside and the other end is opened to the downstream side of the evaporator (9) to allow outside air to be stored. The first outside air introduction pipe (43) introduced to the downstream side of the evaporator (9)
An inside air discharge pipe (44) having one end opened to the outside (B) and the other end opened to the upstream side or the downstream side of the evaporator (9) to discharge the inside air to the outside. An air heat exchanger (45) that cools while dehumidifying the outside air in the first outside air introduction pipe (43) with the inside air in the inside air discharge pipe (44) to a predetermined humidity. And the inside fan (1
0) heat-exchanges the inside air from the inside air return port (25) provided in the casing (3) with the evaporator (9), and then the inside air and the air heat exchanger. (Four
The inside air provided in the casing (3) by mixing with the outside air from the first outside air introduction pipe (43) that is heat-exchanged in 5) and is introduced to the downstream side of the evaporator (9). The air is sent from the outlet (26) into the container box (1), and the inside air that has undergone heat exchange in the evaporator (9) and the warehouse that has undergone heat exchange in the air heat exchanger (45). Temperature detecting means (50) for detecting the temperature of the mixed air with the outside air, and the temperature detecting means (50)
Receiving means output, the refrigerating capacity control means (57) for continuously adjusting the refrigerating capacity of the refrigerating apparatus (2), the humidity detecting means (60) for detecting the humidity of the inside air, and the first outside air The output of the air amount adjusting means (61) for adjusting the amount of outside air introduced from the introduction pipe (43) and the output of the humidity detecting means (60),
Air amount adjusting means (6
Refrigerating apparatus for containers, characterized by being provided with a humidity control means (63) for controlling 1). 2. The first outside air introduction pipe (43) is extended in the longitudinal direction of the evaporator (9), and a plurality of holes (47) for blowing outside air are opened in the longitudinal direction. The container refrigerating apparatus according to claim 1, which is at most. 3. A pressure fan (42) driven by a fan motor (41) inside the first outside air introduction pipe (43) or inside air discharge pipe (44). The fan motor (41) has a low speed mode in which the amount of outside air is small and a high speed mode in which the amount is large,
The humidity control means (63) switches the air amount adjusting means (61) to a low speed mode when the internal humidity is higher than the set humidity, and to a high speed mode when the internal humidity is lower than the set humidity. A container refrigeration system according to claim 1. 4. An air amount adjusting means (61) is a pressurizing fan (42) driven by a fan motor (41) in the first outside air introducing pipe (43) or inside air discharging pipe (44). The fan motor (41) has an OFF mode in which the amount of air in the refrigerator is unnecessary and an ON mode in which the amount of air in the refrigerator is required, and the rotation speed is continuously changed according to the required amount of air in the refrigerator. The humidity control means (63) has a variable rotational speed variable mode,
When the inside humidity is higher than the set humidity, the air amount adjusting means (61) is in the OFF mode, when the inside humidity is lower than the set humidity, it is in the ON mode and the number of rotations depends on the low inside humidity. The container refrigerating apparatus according to claim 1, wherein the refrigerating apparatus for containers is continuously switched to a variable mode. 5. The air amount adjusting means (61) has a closed mode in which the air amount in the refrigerator is unnecessary and an open mode in which the air amount in the refrigerator is required, and the opening degree is continuously set according to the required amount of the air amount in the refrigerator. A switchgear (66) having an adjustable opening variable mode, wherein the humidity control means (63) sets the air amount adjusting means (61) to a closing mode when the inside humidity is higher than a set humidity. The refrigerating apparatus for containers according to claim 1, wherein when the internal humidity is lower than a set humidity, the open mode is continuously switched to the variable opening mode according to the low internal humidity. 6. A second outside air introducing pipe (81) for introducing outside air to the upstream side of the evaporator (9) is provided, and the air amount adjusting means (61) is provided for the second outside air. Air introduction pipe (71), 1st
The first outside air introduction pipe (43) and the inside air are provided in the outside air introduction pipe (43) and the inside air discharge pipe (44) and close the second outside air introduction pipe (81). A first mode in which the discharge pipe (44) is opened, and a first mode in which the first outside air introduction pipe (43) is closed and the second outside air introduction pipe (81) and the inside air discharge pipe (44) are opened The container according to claim (1), which has two modes and a third mode in which the first and second outside air introduction pipes (43) and (81) and the inside air discharge pipe (44) are closed. Refrigeration equipment.