JPH0628579U - Structure of natural ventilation cooler - Google Patents

Abstract

(57) [Summary] [Purpose] Preventing asphyxia due to gas generated by fresh cargo such as fruits and vegetables, and maintaining long-distance transportation while maintaining an active state. [Structure] An intake port 3 penetrating outside the vehicle and an intake damper 3 coming into contact with and separated from the front wall 11 of a cargo compartment 1 of a truck.
1, a rear wall 12 is provided with an exhaust port 4 penetrating to the outside of the vehicle and an exhaust damper 41 coming in contact with and separated from the exhaust port 4, and actuators 5 for opening and closing the intake damper 31 and the exhaust damper 41, respectively.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a cargo compartment of a refrigerated vehicle.

[0002]

[Prior art]

 As disclosed in Japanese Utility Model Laid-Open No. 60-96108, the cargo compartment of a refrigerated vehicle that is equipped with a cooling device in the cargo compartment of the truck and transports refrigerated cargo is equipped with a blower fan for the evaporator of the refrigeration cycle in a closed cargo compartment. It is known to be equipped.

Further, as shown in FIG. 5, a cargo room 1 is constituted by an inner wall 10 sealed by a heat insulating material, an evaporator 21 for a cooling cycle is provided in the cargo room 1, and the cargo room 1 is installed in the evaporator 21. There is also known a method in which a fan 22 for blowing the air inside of the inside (hereinafter referred to as the inside air) is provided in the vicinity, and the inside air is circulated and cooled so that a constant temperature is always maintained.

[0004]

[Problems to be solved by the device]

 However, when vegetables and fruits are refrigerated and transported over a long distance, since the cargo compartment 1 is closed, the gas generated from the fruits and vegetables loaded is not exhausted and constantly circulates. Problems such as flowers falling into asphyxia and having to be resuscitated after arriving at their destinations not only take a long time to perform this resuscitation work, but also damage fruits and vegetables during resuscitation work, impairing their commercial viability. There has occurred.

[0005] Therefore, the present invention aims to prevent asphyxia of fruits and vegetables, flowers, and the like, and maintain the active state to transport over a long distance.

[0006]

[Means for Solving the Problems]

 The present invention, in a cold-insulated vehicle in which a cooling device is installed in a closed cargo compartment of a truck, has existing intake ports and exhaust ports communicating with the cargo compartment and the outside of the vehicle, and selectively opens and closes these intake ports and exhaust ports. Provide means.

Further, in the present invention, an intake port communicating with the cooling device is provided.

Further, in the above invention, an inside air sensor for detecting temperature and humidity is provided inside the cargo compartment, and an outside air sensor for detecting temperature and humidity of outside air is provided outside the vehicle to set the temperature and humidity inside the cargo compartment. Setting means, control means for comparing the detected values of the inside air sensor and the outside air sensor with the set values by the setting means, drive means for driving an actuator based on the judgment result of the control means, and the control means and the drive means. Switching means for switching the connection of the means is provided.

[0009]

[Action]

 When the driver drives the actuator to open the intake port and exhaust port while the truck is traveling, the outside air is introduced from the intake port by the wind pressure, and the inside air in the cargo compartment is exhausted from the exhaust port by the pressure of the introduced outside air. It If the intake port and the exhaust port are closed at the same time, the inside of the cargo compartment will be closed and the inside air can be circulated for cooling.

Further, when the intake port and the exhaust port communicating with the cooling device are opened, the outside air is cooled by the cooling device before being introduced into the cargo compartment, and the inside air can be discharged while keeping the temperature of the inside air constant. Become.

After the driver sets the temperature and humidity of the inside air of the cargo compartment, the intake port and the exhaust port are automatically opened and closed while the set values are maintained, and the outside air is introduced and the inside air is discharged.

[0012]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a sealed cargo compartment of a truck, which is arranged at a rear portion of an operator's cab 6 and is constituted by an inner wall 10 formed of a heat insulating material. Reference numeral 11 is a front wall forming a front portion of the cargo compartment 1, and 12 is a rear wall forming a rear portion of the cargo compartment 1.

Reference numeral 2 denotes a cooling device provided in the vicinity of the upper inside of the front wall 11, which houses an evaporator and a fan (not shown), introduces and cools the inside air, and then blows the air into the cargo room 1, The inside of 1 is maintained at a preset temperature.

Reference numeral 3 denotes an intake port penetrating the upper portion of the front wall 11 and reference numeral 31 denotes an intake damper provided on the inner upper portion of the front wall 11. The intake damper 31 is provided in proximity to the intake damper 31. It is connected to the attached actuator 5 and driven, and contacts and separates from the inside of the intake port 3 to open and close the intake port 3. The intake port 3 and the intake damper 31 and the actuator 5 are provided one each on the left and right sides of the cooling device 2. In FIG. 2, the left side is the intake port 3L and the intake damper 31L, and the right side is the intake port 3R and the intake damper 31R. Is.

Reference numeral 4 denotes an exhaust port penetrating the upper and lower portions of the rear wall 12 on the left and right sides, respectively. Inside the rear wall 12, exhaust dampers 41 that are opened and closed by contacting with and separating from the exhaust port 4 are provided. In FIG. 2, the left side is the exhaust port 4L and the exhaust damper 41L, and the right side is the exhaust port 4R and the exhaust damper 41R. The exhaust damper 41 is connected to and driven by the actuator 5 provided in the vicinity thereof.

The actuator 5 is connected to the intake damper 31 and the exhaust damper 41 by fastening the intake damper 31 and the exhaust damper 41 to a shaft (not shown) of the actuator 5 with bolts (not shown). Further, the drive of the actuator 5 is selectively opened / closed by a driver's judgment by a switch (not shown) provided in the operation chamber 6 and a thermometer for the inside air.

In addition, in this embodiment, the intake damper 31 and the exhaust damper 41, which are the opening / closing means for the intake port 3 and the exhaust port 4, can be automatically opened and closed by the actuator 5, but a configuration is possible in which they are opened and closed manually. It can also be adopted.

With the above configuration, the operation will be described below.

When the intake damper 31 and the exhaust damper 41 are selected by a switch (not shown) in the operator's cab 6 during traveling and the actuators 5 are driven respectively, the intake damper 31 and the exhaust damper 41 reach the positions indicated by broken lines in the figure, respectively. Open and open the intake port 3 and the exhaust port 4. Fresh air is introduced from the intake port 3 by the traveling wind, and the inside air is exhausted from the exhaust port 4 along with this, and the gas generated from the loaded fruits and vegetables is also exhausted.

When the difference between the outside air temperature and the inside air temperature is large, if the intake damper 31 and the exhaust damper 41 are all opened, the inside air temperature of the cargo room 1 will rise rapidly. Therefore, the intake damper 31 and the exhaust damper 41 are partially selected and opened. That is, the intake damper 31L and the exhaust damper 41L on the left side of the cargo room 1 are selected and opened, and the intake port 3L and the exhaust port 4L are opened to introduce the outside air and exhaust the inside air. Therefore, compared to the case where all of the intake damper 31 and the exhaust damper 41 are opened, the amount of inside air discharged is small, but the inside air temperature can be prevented from changing suddenly and the inside air can be discharged reliably.

After opening the intake damper 31 and the exhaust damper 41, it is confirmed by a thermometer (not shown) provided in the operator's cab 6 that the inside air temperature has risen above a preset temperature, and the actuator 5 is operated by the driver. Is driven to close the intake damper 31 and the exhaust damper 41 to shut off the inside air of the cargo compartment 1 from the outside air, and the cooling device 2 keeps the inside air at the set temperature again.

Therefore, even if fruits and flowers are transported over a long distance while being kept cool, the inside air can be discharged while taking in fresh outside air due to the traveling wind, so the gas generated from fruits and flowers must be discharged. Since it is possible to transport these fruits and flowers for a long distance while maintaining their active state without causing them to fall into the state of asphyxia, the intake damper 31 and the exhaust damper 41 can be selectively opened and closed. Since the effect of the outside air temperature is minimized and the preset temperature can be maintained, the conventional cold insulation function is not impaired.

FIG. 3 shows a second embodiment, in which the cooling device 2 is provided at a position communicating with the intake port 3 and the intake damper 31 of the above-mentioned embodiment, and all the introduced outside air is supplied to the fan 22 and the evaporator 21. It leads to. When the actuator 5 is driven to open the intake damper 31 to the fully open position indicated by the broken line, the intake port 3 is opened and the inside air introduction port 23 is closed, and the outside air is introduced by the rotation of the fan 22 and passes through the evaporator 21. After being cooled to a predetermined temperature, it is sent to the cargo compartment 1. The structure and operation of the exhaust damper 41 and the exhaust port 4 are the same as those in the above-mentioned embodiment.

In the second embodiment, the intake damper 31 and the exhaust damper 31 are exhausted even when the outside air is not introduced smoothly due to the running wind due to a long stoppage due to traffic jams, naps, etc., or when the outside air temperature is extremely high. When 41 is opened and the fan 22 is rotated, not only the outside air is always introduced, but the introduced outside air is always cooled by the evaporator 21, so that the outside air is introduced and discharged without increasing the inside temperature. Since the gas generated from fruits and vegetables is also discharged, it becomes possible to transport fruits and vegetables sensitive to temperature changes over a long distance or for a long time in an active state. Further, when the intake damper 31 is closed, the inside air introduction port 23 is opened to cool the inside air circulation, and it is also possible to cool the inside air rapidly as in a general cold storage vehicle.

FIGS. 4 and 5 show a third embodiment, in which 61L is an inside air sensor for detecting temperature and humidity on the inside left side of the cargo compartment 1, which is provided at a predetermined position on the inside left side of the cargo compartment 1. Reference numeral 62 denotes an outside air sensor that detects the temperature and humidity outside the cargo compartment 1 and is provided outside the cargo compartment 1. The inside air sensor 61L and the outside air sensor 62 are connected to the control means 50, respectively. The driver's cab 6 is provided with a setting means 52 for setting the temperature and humidity of the inside of the cargo room 1, a display means 53 for displaying the detected values of the inside air sensor 61L and the outside air sensor 62, and is connected to the control means 50. A switching means 54 for switching the driving method of No. 5 is provided and is connected to the control means 50 and the driving means 51.

The drive means 51 is connected to the control means 50 and is also connected to each of the actuators 5 that drive the intake damper 31L and the exhaust damper 41L. The drive means 51 selectively or simultaneously drives the actuator 5 in accordance with the signal sent from the control means 50. In FIG. 4, only the left half of the cargo compartment 1 shown in FIG. 2 is shown for simplification.

Based on the above configuration, the control means 50 controls the actuator 5 via the drive means 51 according to the flowchart of FIG. That is, in steps 71 and 72, the inside air temperature and humidity on the left side of the cargo compartment 1 are read from the inside air sensor 61L, and in steps 73 and 74, these detected values are compared with the temperature and humidity preset by the setting means 52. As a result of the comparison, when the temperature is equal to or higher than the set value and the humidity is equal to or lower than the set value, the time during which the cargo compartment 1 is sealed in Step 79 is compared with the time Tm during which the load such as fruits and vegetables can withstand the sealing, If it does not exceed Tm, in step 80, the actuator 5 sends a signal to the driving means 51 to drive the intake damper 31L and the exhaust damper 41L in the closing direction. However, when the sealing time exceeds Tm, in step 81, the intake damper 31L and the exhaust damper 41L are forcibly opened to introduce the outside air and exhaust the inside air, and the gas generated by the fruits and vegetables is discharged. Prevent falling into asphyxia. The time Tm is preset by the setting means 52.

On the other hand, when both the temperature and humidity inside the cargo compartment 1 are within the set values, the outside air temperature and humidity are read from the outside air sensor 62 in steps 75 and 76, and the outside air temperature and humidity are preset in steps 77 and 78. When the outside air temperature is within the limit value and the outside air humidity is above the limit value, the actuator 5 directs the driving means 51 to move the intake damper 31L and the exhaust damper 41L to the fully open direction at step 81. Send a signal to drive.

The control means 50 constantly repeats the automatic control according to the above flow for the actuators 5 that drive the intake damper 31L and the exhaust damper 41L, respectively, and further reads the display means 53 in steps 71 and 72. The detected values of the temperature and humidity of the inside air and the outside air read in steps 75 and 76 are sent, and the detected values are displayed on the display means 53 to inform the driver of the state of the cargo compartment 1.

The switching means 54 switches the control of the actuator 5 to manual or automatic, and is switched according to the driver's need. When manual is selected, the same operation as in the first embodiment is performed. When automatic is selected, the control means 50 performs automatic control.

The right half of the cargo compartment 1 (not shown) has the same configuration and operation as those described above. That is, an inside air sensor 61R (not shown) is provided at a predetermined position on the right side inside the cargo room 1, is connected to the control means 50, and the driving means 51 connected to the control means 50 connects the intake damper 31R and the exhaust damper. Drive 41R. The control of the intake damper 31R and the exhaust damper 41R is performed independently from the intake damper 31L and the exhaust damper 41L according to the flow chart of FIG. 5 described above.

Therefore, according to the automatic control of the control means 50, the actuators 5 of the intake damper 31 and the exhaust damper 41 are independently opened and closed according to the left and right temperature and humidity distribution of the cargo compartment 1, By introducing the outside air and discharging the inside air selectively or simultaneously, the fluctuation of temperature and humidity in the cargo compartment 1 can be reduced, the gas generated from fruits and vegetables can be discharged, and the fruits and vegetables can be put into asphyxia. It is possible to transport the material for a long distance or for a long time while maintaining the active state.

In addition, after setting the temperature and humidity of the cargo compartment 1 by the setting means 52, the outside air is automatically introduced and the inside air is discharged, so that the driver does not pay attention to the load. You can concentrate on driving.

In the above embodiment, the intake port 3 and the exhaust port 4 are provided on the front wall 11 and the rear wall 12 of the cargo room 1, respectively. However, it is possible to introduce the outside air and discharge the inside air smoothly. If so, the same action and effect can be obtained, and although not shown, the intake port 3 and the exhaust port 4 may be provided on the side surface or the ceiling of the cargo compartment 1, respectively.

Similarly, although the intake damper 3 and the exhaust damper 41 are used to open and close the intake port 3 and the exhaust port 4, the same action and effect can be obtained even with a rotary shutter or the like, which is not particularly limited. is not.

[0037]

[Effect of device]

 As described above, according to the present invention, since the cargo room is provided with an intake port and an exhaust port that can be opened and closed freely, no fresh power is required and fresh outside air is introduced from the intake port by the wind pressure during traveling. The inside air is discharged along with this, and the gas from which fruits and vegetables and flowers are loaded can be discharged, and these loads are kept active at all times, and the intake and exhaust ports are closed to impair the cold insulation effect. It has the effect that it can be transported over long distances.

Further, since the intake port and the cooling device are communicated with each other, even if the vehicle is stopped for a long time due to traffic congestion, nap, etc., the fan of the cooling device constantly introduces the outside air to discharge the inside air while keeping it cool. Therefore, it is possible to transport the loaded fruits and vegetables, etc. over a long distance or over a long period of time regardless of the operating conditions while keeping the fruits and vegetables loaded, etc. in an active state at all times.

Further, in order to automatically open and close the intake port and the exhaust port by setting the temperature and humidity in the cargo compartment to introduce the outside air and exhaust the inside air while keeping the temperature and humidity of the inside air constant. In addition, fruits and vegetables can be kept active all the time for long-distance or long-term transportation, and the driver can concentrate on driving without paying attention to the conditions inside the cargo compartment.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partial view of a front wall 11 showing a second embodiment.

FIG. 4 is a schematic diagram showing a third embodiment.

FIG. 5 is a flowchart showing the control operation of the third embodiment.

FIG. 6 is a schematic diagram showing a conventional technique.

[Explanation of symbols]

 1 Cargo Room 2 Cooling Device 3 Intake Port 4 Exhaust Port 5 Actuator 6 Operator's Cabin 11 Front Wall 12 Rear Wall 31 Intake Damper 41 Exhaust Damper

Claims (3)

[Scope of utility model registration request] 1. A refrigerating vehicle in which a cooling device is installed in a closed cargo compartment of a truck, is provided with an intake port and an exhaust port communicating with the exterior of the cargo chamber, and means for selectively opening and closing the intake port and the exhaust port, respectively. The structure of a refrigerated vehicle characterized by the provision of. 2. A cool vehicle in which a cooling device is installed in a closed cargo compartment of a truck, means for providing an intake port and an exhaust port communicating with the exterior of the cargo room, and selectively opening and closing the intake port and the exhaust port, respectively. And a structure in which the intake port communicates with a cooling device. 3. An internal air sensor for detecting temperature and humidity inside the cargo compartment, and an outside air sensor for detecting temperature and humidity of outside air outside the vehicle, and setting means for setting temperature and humidity inside the cargo compartment, Control means for comparing the detected values of the inside air sensor and the outside air sensor with the set value by the setting means, drive means for driving the actuator based on the determination result of the control means, and switching for switching the connection between the control means and the drive means. The structure of the cold insulation vehicle according to claim 1 or 2, further comprising means.