JPH0656191A - Moisture condensation preventive device for container - Google Patents

Abstract

PURPOSE:To perform an appropriate ventilation without being affected by the outside wind of a container by providing a passage forming unit respectively at a first opening and second opening. CONSTITUTION:An air outlet 30 is formed to penetrate a front door, at an upper part of the front door 2 which is located in the longitudinal direction of a container 1, and at the air outlet 30, an air discharge unit 31 is provided. Also, at an upper part of a back surface wall 3 which is confronted with the front door 2, an air inlet 20 which is arranged on an approximately diagonal line with the air outlet 30 is formed to penetrate the base surface wall 3, and at the air inlet 20, an air suction unit 21 is provided. When the outside wind of the container does not oppose the blowing of a blower, the ventilation in the container 1 is performed by the operation of the blower. Also, when the volume of the outside wind of the container which opposes the blowing of the blower is at a specified volume or more, the blower is stopped, and the ventilation in the container 1 is performed by the wind pressure of the outside wind.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container dew condensation preventing device for preventing dew condensation inside a container.

[0002]

2. Description of the Related Art Since dew condensation is likely to occur inside a large container, the inventor of the present application has already proposed a dew condensation preventing device for a container, which is a ventilation device using a blower (Japanese Patent Application No. 2-407956). In this dew condensation prevention device, the container is provided with an intake port and an exhaust port, and an exhaust port is provided with an exhaust blower to keep the blower constant under constant conditions based on the temperature, inner wall temperature, humidity, etc. inside the container. By operating for a while to discharge the air inside the container, the inside of the container is ventilated, and as a result, the humidity inside the container is lowered. Also, if there is a wind in the opposite direction to the blowing direction of the blower that discharges the air in the container to the outside,
Since the ventilation of the blower receives the wind pressure and the ventilation volume in the container decreases, a cover or damper is installed at the opening of the exhaust port equipped with the blower to prevent it from being affected by the wind facing the blower. Is

[0003]

However, in the ventilator using the blower described above, the wind in the direction opposite to the blower direction of the blower,
That is, when the volume of air flowing from the outside of the container to the inside of the container through the exhaust port exceeds a certain level, for example, the wind speed increases to 10 m / sec or more, and the blast of the blower receives wind pressure, the amount of air discharged by the blower decreases. As a result, sufficient ventilation cannot be performed inside the container.

It is an object of the present invention to provide a dew condensation preventing device for a container, which can perform proper ventilation without being affected by the wind outside the container.

[0005]

According to the present invention, there is provided a container for accommodating luggage, a first opening formed in the container for communicating the inside and the outside of the container, and the first of the containers. Is formed in a different part from the opening of
A second opening communicating the inside and outside of the container;
A first passage forming unit that is provided in the first opening and has a communication passage that has at least a portion that faces downward from an inner opening that faces the inside of the container; A second passage forming unit for communicating the inside and the outside of the container with a communication passage that is provided in the second opening and has at least a portion directed downward from the inner opening facing the inside of the container; A blower that is provided in either the passage forming unit or the second passage forming unit and discharges the air in the container to the outside; and an air volume detecting unit that detects an air volume in a direction opposite to the air blown by the blower, When the air volume detected by the air volume detection means is larger than a predetermined air volume, the technical means comprises a control means for stopping the blower.

[0006]

According to the present invention, the first opening and the second opening are respectively provided with the first passage forming unit and the second passage forming unit, and each unit communicates the inside and the outside of the container. Therefore, if the blower is not operating, the outside air will enter the container depending on the wind pressure generated by the wind outside the container.
Natural ventilation is provided.

[0007] When the blower is operating, if the external wind that opposes the blowing direction of the blower is weak, the air in the container is discharged to the outside of the container from one opening provided with the blower. Therefore, the air pressure inside the container decreases, and the air outside the container is sucked into the container through the other opening. Therefore, the forced ventilation in the container is performed by the operation of the blower. When the blower is operating and the wind generated outside the container is in the opposite direction to the blowing direction of the blower, the blower operation is stopped when the air volume exceeds a predetermined air volume. Therefore, due to the pressure of the external wind that opposes the blowing direction of the blower, the air outside the container is pushed into the inside of the container from the communication passage of the passage forming unit on the side provided with the blower, and the air inside the container is blown by the blower. Since the air is discharged to the outside of the container from the communication passage of the passage forming unit on the side not provided with and the air passes through the inside of the container, it is possible to perform ventilation by natural wind.

Further, since each communication passage is formed downward from the inner opening facing the inside of the container, even if rain or the like hitting the outer wall of the container enters the communication passage,
Does not penetrate into the container through the inner opening.

[0009]

According to the present invention, when the air outside the container does not oppose the air blow of the blower, the air inside the container is ventilated by the operation of the air blower, and the air volume of the air outside the container that opposes the air blow of the air blower is predetermined. When the air volume is higher than the air volume, the blower is stopped and the air pressure in the container is used to ventilate the inside of the container. Therefore, even if there is wind that opposes the blowing direction of the blower, it does not interfere with the ventilation in the container, and it is possible to perform ventilation in the container by forced ventilation by the operation of the blower or natural ventilation by natural wind. It is possible to prevent dew condensation in the container.
In addition, when the blower stops, the air volume outside the container is more than the predetermined air volume and the natural air can sufficiently ventilate the inside of the container. Labor saving can be achieved by reducing power consumption.

[0010]

EXAMPLES Next, the present invention will be explained based on examples. The container 1 shown in FIG. 1 has an outer wall formed of an iron plate. An exhaust port 30 is formed through the front door 2 at an upper portion of the front door 2 located in the longitudinal direction of the container 1, and the exhaust port 30 is provided with an exhaust unit 31 as shown in FIG. ing. Also, front door 2 of container 1
In the upper part of the back wall surface 3 facing the exhaust port 30, a suction port 20 arranged substantially diagonally with the exhaust port 30 (see FIGS. 3 and 4) is formed so as to penetrate the back wall surface 3, and the suction port 20 Is equipped with a suction unit 21.

As shown in FIG. 5, the suction unit 21 has a plurality of frame plates 25 surrounding an outer plate 22, a baffle plate 23, and an inner plate 24 having the same width and arranged in three layers at intervals. It is a box-shaped unit that surrounds and is integrated. An outer opening 22a is formed in the upper part of the outer plate 22 facing the outside of the container 1, and an inner opening 24a is formed in the upper part of the inner plate 24 facing the inner side of the container 1.

The length of the baffle plate 23 is set shorter than the lengths of the outer plate 22 and the inner plate 24.
The baffle plate 23 is arranged at an intermediate position between the outer plate 22 and the inner plate 24, the upper end of the baffle plate 23 is located at the same height as the outer plate 22 and the inner plate 24, and the lower end of the baffle plate 23 is , The outer plate 22 and the inner plate 24 are located above the lower ends thereof. Thereby, the space before and after the baffle plate 23 is
Suction passage 2 communicating below the baffle plate 23
6, the outer opening 22a and the inner opening 24a are connected by the suction passage 26. Therefore, in the container 1, at the suction port 20, the outside and the inside of the container are communicated by the suction unit 21. Further, the baffle plate 23 is arranged on a straight line connecting the inner opening 24a and the outer opening 22a, and the inner opening 24a and the outer opening 22 are provided.
a is shielded and the suction passage 26 is formed downward with respect to the inner opening 24a, the wind sucked from the outside of the container 1 is baffle plate as shown by the white arrow. The direction is changed and weakened at 23, so that the suction unit 21 does not pass directly.

The outer opening 22 of the suction unit 21
The a is covered with the punching metal 22b so that foreign matters and the like are hard to enter. Further, at the lower end of the outer plate 22 of the suction unit 21, dripping into the suction passage 26,
A drain discharge port 27 is formed so as to penetrate the infiltrated rainwater to the outside of the container 1.

The exhaust unit 31, as shown in FIG.
An outer plate 3 having substantially the same structure as the suction unit 21 and having an outer opening 32a and a drain outlet 37.
2, baffle plate 33, inner plate 3 having an inner opening 34a
4, a plurality of frame plates 35, and an exhaust passage 36 formed by these and connecting the outer opening 32a and the inner opening 34a. The outer opening 32a is provided with a punching metal 32b. Further, the exhaust unit 31 has a structure shown in FIG.
As shown in FIG. 3, a blower 38 operated by a DC motor is provided in the inner opening 34a of the inner plate 34, and a control unit 40 for controlling the blower 38 is provided below the blower 38.

The blower 38 is for discharging the air in the container 1 to the outside of the container 1. By its operation, the air in the container 1 is discharged to the inside opening 34a in the exhaust unit 31, as shown by the white arrow. To exhaust passage 3
6 and further from the exhaust passage 36 to the outer opening 32a
Through the container 1 to the outside of the container 1. In the above configuration, when the blower 38 is not operating,
When the wind from the outside hits the suction port 20 of the container 1, as shown by the white line arrows in FIGS. 3 and 5 and the white line arrow in FIG. 6, the flow of the wind passing almost diagonally in the container 1 is generated. Occurs, the container 1 is naturally ventilated, and the exhaust port 30
When a wind from the outside hits, a flow of wind is generated which passes on a substantially diagonal line in the container 1, as indicated by the hatched arrows in FIGS. 4 and 5 and the hatched arrow in FIG. 6, respectively.

Next, the control unit 40 will be described. As shown in FIG. 8, the control unit 40 includes a wall temperature sensor 41 that detects a wall surface temperature T1 in the container 1 and an inside air temperature sensor 42 that detects an inside air temperature T2 in the container 1 to operate the blower 38. Whether to determine whether or not the predetermined time t
An interval timer for performing the operation at one interval, a timer unit including a fan timer for controlling the operation time of the blower 38, and a switching circuit control the energization of the blower 38 at predetermined intervals of t1 and use a dry battery or a battery as a power source. , To control the air flow. Further, in order to perform more effective ventilation when the ventilation volume by the blower 38 is reduced by the wind pressure acting from the outside of the container 1 in the exhaust unit 31 of the container 1 in the direction opposite to the blowing direction of the blower 38. This is for performing natural ventilation by natural wind by forcibly stopping the blower 38 based on the wall surface temperature T1 inside the container 1, the inside temperature T2 inside the container 1, and the like. Blower 38
When the ventilator is operating, the ventilation air volume is the wind pressure of the air blown onto the front surface of the exhaust port 30, that is, the exhaust unit 3
The forced stop of the blower 38 is performed based on the wind speed of the wind hitting the front face of the exhaust port 30 (hereinafter referred to as the exhaust port front face wind speed). Some embodiments of the control unit 40 for forcibly stopping the blower 38 will be described below.

As shown in FIG. 9, the control unit 40 of the first embodiment is provided with a wind speed sensor 39 for detecting the ventilation wind speed in the exhaust passage 36 and controls the blower 38 according to the detection result of the wind speed sensor 39. . This is because when the wind speed of the air passing through the exhaust passage 36 of the exhaust unit 31 changes according to the ventilation air volume due to the operation of the blower 38, and the wind speed at the front face of the exhaust port becomes large and the ventilation air volume by the blower 38 decreases. This is based on the fact that the wind speed in the exhaust passage 36 decreases. The wind speed sensor 39 opens and closes a contact depending on, for example, whether or not the reference wind speed is higher than or equal to the reference wind speed.
It is set so that the amount of ventilation air passing through the inside of the container 1 is larger when natural ventilation is performed by natural air than when forced ventilation is performed by 8.

Next, the reference wind speed of the wind speed sensor 39 will be described. The ventilation air volume due to the operation of the blower 38 is shown in FIG.
As indicated by the solid line M to the solid line N of FIG. Here, the solid line M indicates the case where the power supply voltage of the control unit 40 is 12 [V] at the beginning of use, and the solid line N indicates that the control unit 40 can operate as the power supply voltage continues to be used. This is based on the assumption that the limit has dropped to 9 [V]. In the figure,
When the blower 38 is used, the ventilation air volume is 9
Between [V] and 12 [V], it changes between the solid line N and the solid line M in accordance with the exhaust port front surface wind speed. At this time, the ventilation wind speed in the exhaust passage 36 in the exhaust unit 31 is proportional to the ventilation air volume of the blower 38 as shown by the solid line R.

On the other hand, when the blower 38 is not operated, the ventilation air volume due to the natural wind increases in proportion to the exhaust port front surface wind speed as shown by the solid line O. Therefore, when there is a wind speed at the front face of the exhaust port, the ventilation air amount by the blower 38 is larger than the ventilation air amount by the natural wind when the wind velocity at the front surface of the exhaust port is smaller than the intersection of the solid line O and the solid line M or the solid line N, and the solid line M. Or, the smallest ventilation air volume among the intersections between the solid lines N is the intersection of the solid line N and the solid line O. For this reason,
In this embodiment, the reference ventilation wind speed for forcibly stopping the blower 38 is the ventilation wind speed at the point n in the ventilation air volume at the intersection of the solid line N and the solid line O (1.08 m / s in this embodiment).
ec), and the wind speed sensor 39 is one that opens and closes the contact at this ventilation wind speed. As a result, when the wind speed sensor 39 detects that the wind speed in the exhaust passage 36 has become equal to or lower than the reference wind speed, the blower 38 is stopped, and the ventilation by the natural wind causes the ventilation with a ventilation volume larger than the ventilation volume by the blower 38. Is done.

Next, the control operation of the control unit 40 of the first embodiment will be described with reference to FIG. When the main switch of the control unit 40 is turned on, the wall temperature sensor 41 measures the temperature T1 of the wall surface in the container 1 (step S1), and the wall surface temperature T1 is set to the initial temperature before time measurement by an interval timer described later. It is replaced and stored as Tn (step S2). Then, the interval timer starts counting, and the interval is set until the next operation for the predetermined time t1 set in the interval timer (step S3). When the predetermined time t1 has elapsed, the wall surface temperature T1 is measured again, and at the same time, the inside air temperature sensor 42 provided to detect the inside air temperature inside the container 1 is also measured.
Thus, the temperature T2 inside the refrigerator is measured (step S4). Further, from the measured wall surface temperature T1 and the initial temperature Tn stored in step S2, the wall surface temperature change ΔTa at a predetermined time t1 (where ΔTa = {Tn−T1} /
It has a relationship of Δt1. ). Wall temperature change Δ
If Ta is greater than or equal to the predetermined value a (YES in step S5), the process proceeds to step S7, and the fan timer is started as a control operation for operating blower 38. When the temperature change ΔTa on the wall surface is smaller than the predetermined value a (NO in step S5), the inside temperature T
The temperature difference ΔTb between 2 and the wall surface temperature T1 is determined (step S6).

When the temperature difference ΔTb is equal to or larger than the predetermined value b (YES in step S6), the process proceeds to step S7, and the fan timer is started as a control operation for operating the blower 38. When the temperature difference ΔTb is smaller than the predetermined value b (NO in step S6),
Since there is no risk of dew condensation in the container 1, the control operation for operating the blower 38 is not performed, the process proceeds to step S1, and step S1 and subsequent steps are repeated again. When the time measurement of the fan timer is started in step S7, the blower 38 operates during the operation time t2 of the fan timer to exhaust the air in the container 1. continue,
The detection result of the wind speed sensor 39 is measured (step S8),
The ventilation wind speed v is compared with the reference wind speed V, and when the exhaust airflow front wind speed is sufficiently low and the ventilation wind speed v is equal to or higher than the reference wind speed V (YES in step S9), the fan timer is counting (in step S10). NO), step S9
Then, the comparison and determination of the ventilation wind speed v and the reference wind speed V are repeated.

In step S9, since the wind velocity on the front face of the exhaust port is large with respect to the blowing amount of the blower 38, the ventilation wind velocity v
Is smaller than the reference wind speed V (NO), the blower 38 is operated even while the operation time t2 is being measured by the fan timer.
Is forcibly stopped, the ventilation by the blower 38 is terminated (step S11), and the process proceeds to step S1. In step S10, when the fan timer has finished measuring time (YES), the process proceeds to step S1. By performing the above control operation, in the first embodiment, the predetermined time t1 measured by the interval timer
Whether or not the blower 38 is operated at intervals is the wall surface temperature T
1. When the blower 38 is operated based on the internal temperature T2, the blower 3 is continuously operated based on the detection signal of the wind speed sensor 39 during the operation time t2 of the fan timer.
Whether to operate 8 is determined based on the detection signal of the wind speed sensor 39. As a result, when the wind velocity on the front side of the exhaust port is low, the blower 38 performs forced ventilation for the operation time t2 at predetermined time intervals t1, and the wind velocity on the front side of the exhaust port is high.
When the amount of ventilation air from the blower 38 is small, the blower 38 is stopped and natural ventilation is performed by natural air.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described based on 3. In this embodiment, in order to detect that the wind velocity at the front of the exhaust port is increased and the ventilation air volume by the blower 38 is decreased, the current value of the motor of the blower 38 is used instead of the wind speed sensor 39 in the above embodiment. Then, in step S18 of FIG.
The applied voltage to the motor and the current value are measured, and in step S19, it is determined whether or not the current value I to the motor of the blower 38 exceeds a reference current value Is predetermined according to the applied voltage. ing. When driving the blower 38, when the blower 38 normally rotates without receiving the wind pressure, a constant current value flows with respect to the voltage applied to the motor of the blower 38, but the blower 38 is When the wind outside the unit 1 hits and the rotation of the blower 38 is obstructed, the load on the motor that drives the fan becomes large. Therefore, as shown by solid lines P and Q in FIG. Current value increases. In this case, the current value increases as the applied voltage increases. In addition, in FIG.
The solid line P shows the case where the applied voltage is 12 [V], and the solid line Q
Indicates the case where the operation limit of the control unit 30 is 9 [V] as the lowest applied voltage. Therefore, in this embodiment, the current value of the motor for driving the fan is detected by a separate circuit, and the operation of the blower 38 is forcibly stopped based on the current value. Here, the current value of the motor differs depending on the applied voltage, and even if the load of the fan is the same, the current value differs depending on the applied voltage. Therefore, not only the motor current value is detected, but also the applied voltage to the motor is detected at the same time, and when the reference current value corresponding to the detected voltage is exceeded, the operation of the blower 38 is stopped. That is, when the applied voltage is 12 [V], the current value indicated by the point p is exceeded, and when the applied voltage is 9 [V], the current value indicated by the point q is exceeded. In this case, the operation of the blower 38 is stopped.

Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, instead of the current value to the motor of the blower 38 detected in the second embodiment, the motor rotation speed, that is, the blower rotation speed is detected. Here, in order to detect the rotation speed of the blower 38, a rotation speed sensor for detecting the rotation speed may be provided.
If the motor is equipped with rotation speed detection, it is not necessary to separately provide a rotation speed sensor. Also in this embodiment, it is necessary to detect the voltage applied to the motor at the same time as detecting the rotation speed. In this embodiment, as the wind speed at the front of the exhaust port increases, the blower rotation speed decreases as shown by the solid line S and the solid line T in FIG. 14, respectively. Therefore, when the blower rotation speed becomes lower than the reference rotation speed, Deactivate 38. The reference rotational speed in this embodiment is preset according to the applied voltage as in the case of the second embodiment. For example, when the applied voltage is 12 [V], the point s is set.
The blower rotation speed of 2850 rpm is set, and when the applied voltage is 9 [V], the blower rotation speed of 2150 rpm shown by the point t is set.

Next, a fourth embodiment of the present invention will be described with reference to FIG. In this embodiment, as a method of air volume detection,
Instead of the wind speed sensor 39 in the first embodiment, a pressure sensor is provided in the exhaust passage 36 to detect the blowing pressure. When the blower 38 is operating and there is an opposing wind, the blowing pressure in the exhaust passage 36 increases as shown by the solid lines U and V in FIG. This blow pressure differs depending on the operating state of the blower 38, that is, the applied voltage. Therefore, in this embodiment as well, the blow pressure and the applied voltage to the motor of the blower 38 are simultaneously detected, and a reference pressure corresponding to the applied voltage is detected. If it is larger than the value, blower 38
Stop the operation of. The reference pressure value in this embodiment is preset according to the applied voltage, as in the case of the second and third embodiments, and the applied voltage is 12
In the case of [V], the blowing pressure of 3.9 mmH ₂ O indicated by the point u is set, and when the applied voltage is 9 [V], the blowing pressure of 2.5 mmH ₂ O indicated by the point v is set. The blast pressure is set. In each of the above embodiments, the container 1
Exhaust port 30 and exhaust unit 31 on the front door 2 of
Although the back wall 3 is provided with the suction port 20 and the suction unit 21, respectively, the front door 2 may be provided with the suction port 20 and the suction unit 21, and the back wall 3 may be provided with the exhaust port 30 and the exhaust unit 31. Good.

[Brief description of drawings]

FIG. 1 is a perspective view of a container equipped with a dew condensation prevention device of the present invention.

FIG. 2 is a cross-sectional view of a container provided with the dew condensation preventing device of the present invention.

FIG. 3 is a plan view of the container for explaining the flow of air in the container.

FIG. 4 is a plan view of the container for explaining the flow of air in the container.

FIG. 5 shows a suction unit according to the present invention, (a)
Is a rear view from the inside of the container, (b) is a sectional view,
(C) is a front view from the outside of the container.

FIG. 6 shows an exhaust unit according to the present invention, in which (a) is a rear view from the inside of the container, (b) is a sectional view, and (c).
[Fig. 3] is a front view from the outside of the container.

FIG. 7 is a rear view showing an exhaust unit provided at an exhaust port of the container from the inside of the container.

FIG. 8 is a circuit diagram showing a control unit provided in the exhaust unit.

FIG. 9 shows an exhaust unit including the control unit of the first embodiment of the present invention, (a) is a rear view and (b) is a sectional view.

FIG. 10 is a characteristic diagram for explaining the control unit according to the first embodiment of the present invention.

FIG. 11 is a flow chart for explaining a control operation of the control unit according to the first embodiment of the present invention.

FIG. 12 is a flow chart for explaining a control operation of the control unit according to the second embodiment of the present invention.

FIG. 13 is a characteristic diagram for explaining a control unit according to a second embodiment of the present invention.

FIG. 14 is a characteristic diagram for explaining a control unit according to a third embodiment of the present invention.

FIG. 15 is a characteristic diagram illustrating a control unit according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Container 20 Suction Port (First Opening) 21 Suction Unit (First Passage Forming Unit) 26 Suction Passage (Communication Passage) 30 Exhaust Port (Second Opening) 31 Exhaust Unit (Second Passage Forming Unit) 36 Exhaust passage (communication passage) 38 Blower 39 Wind speed sensor (air volume detection means) 40 Control unit (control means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuyuki Ouchi 2-1-1 Toranomon, Minato-ku, Tokyo Inside Osaka MOL Mitsui Shipping Co., Ltd. (72) Innovator Fuminobu Kondo Toranomon, Minato-ku, Tokyo Gate 2-1-1 Osaka MOL Mitsui Shipping Co., Ltd.

Claims (1)

[Claims] 1. A container for accommodating luggage inside, a first opening formed in the container for communicating the inside and the outside of the container, and a portion of the container different from the first opening And a second opening for communicating the inside and the outside of the container with each other, and a communication passage provided in the first opening and having at least a portion extending downward from the inner opening facing the inside of the container. A first passage forming unit that communicates the inside and the outside with the inside of the container by a communication passage that is provided in the second opening and has at least a portion from the inner opening facing the inside toward the lower side. A second passage forming unit that communicates with the outside, and either one of the first passage forming unit or the second passage forming unit. An air blower that discharges the air in the container to the outside, an air flow amount detection unit that detects an air flow amount in a direction opposite to the air flow by the air blower, and an air blower when the air flow amount detected by the air flow amount detection unit is larger than a predetermined air flow amount. Dew condensation prevention device for containers, which consists of control means to stop.