JPH0568741U - Air-curtain device for opening of cargo box of van type refrigeration vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] An air-curtain device consisting of an electric fan is attached to the top or floor of the loading / unloading opening of the cargo box of a van type refrigeration vehicle to prevent cold air from flowing out of the refrigerator. The purpose is to maintain the set temperature. [Configuration] In the upper corner of the door opening of the van type refrigeration vehicle,
An electric fan was installed to incline the discharge port slightly inward, and a cart was provided on the door side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air-curtain device attached to a cargo box opening of a van type refrigeration vehicle.

[0002]

[Prior Art]

 A van-type refrigeration vehicle is used as a transportation means for fresh food, frozen food, and the like. Particularly in van-type refrigeration vehicles used for small-lot delivery, the door is opened frequently, so that cold air inside the refrigerator and warm air outside the refrigerator are replaced each time. As a result, the internal temperature rose and it was not possible to maintain the set temperature of the loaded cargo. As a solution to this problem, as shown in Fig. 6, there is a measure to prevent the outflow of cold air by arranging a carten in the baggage carrying-in opening, but this is an obstacle when carrying in and out the baggage. , Not welcomed by the workers.

[0003]

[Problems to be solved by the device]

 The purpose is to prevent the outflow of cold air in the refrigerator and maintain the preset temperature in the refrigerator by installing an air-heater device consisting of an electric fan at the top of the loading / unloading opening of the van type refrigeration vehicle or on the floor. And

[0004]

[Means for Solving the Problems]

 In a van-type refrigeration vehicle, an electric fan was installed at the upper corner of the door opening so that the discharge port was slightly inclined inward. In addition to the electric fan, a cart was stretched above the door opening in the vertical direction of the opening. Furthermore, in van-type refrigeration vehicles, a first electric fan with a downward discharge port is provided at the upper corner of the door opening, and a second electric fan with a downward discharge port is installed facing the first electric fan. In addition, the discharge ports of the first electric fan and the second electric fan are installed at a small distance L toward the front and rear of the luggage box.

[0005]

First Embodiment An embodiment according to the present invention will be described with reference to FIG. In FIG. 1, the discharge port 2 of the electric fan 1 is located slightly inward from the vertical line Y-Y (front of the vehicle). The electric fan (cross flow fan) 1 located at the upper corner of the door opening is installed close to the upper corners so that the effective volume in the refrigerator is not reduced. When the discharge port 2 of the electric fan 1 is positioned on the vertical line Y-Y, the air flow vertically descends and hits the floor surface, and then is distributed to the inside and outside of the refrigerator. According to the experimental results, it was found that the amount of air flowing to the outside of the refrigerator was considerably larger than the amount of air flowing to the inside of the refrigerator.

Therefore, in the present invention, the outlet 2 of the electric fan 1 is inclined at an angle α slightly inward from the position of the vertical line YY. As a result, the amount of air flowing inside the refrigerator becomes larger than the amount of air flowing outside the refrigerator, and the cold air inside the refrigerator is significantly reduced from flowing out.

In addition to the above-mentioned device, as a measure for preventing the outflow of cold air to the outside of the refrigerator, a carten 3 having a height of about 1/3 of the opening height may be provided above the opening of the door. The effects are synergistic.

[0008]

Second Embodiment FIG. 2 shows a second embodiment of the present invention. In this embodiment, the electric fans 1a and 1b are installed at the corners of the ceiling and below the floor with the discharge ports facing each other, and the positions of the discharge ports 2a and 2b of both are set to a small distance L in the front-rear direction. It's just separated. By doing so, the air flows (air-curtains) from the electric fans 1a and 1b form two layers of air-curtains having different flow directions, so that the inside and the outside of the refrigerator are completely removed. Can be shut off. As a result, the cold air in the cold storage does not flow out of the cold storage due to the two layers of air-curtains flowing in opposite directions.

The electric fan 1b installed under the floor is as shown in FIG. 3 so as not to get in the way during cargo handling work. That is, the electric fan 1b is installed within the height of the floor rails 4 arranged on the floor surface, and the fan 1b is housed in a rectangular parallelepiped protective box 5 (Fig. 4) and its discharge port 2b. A cap-like lid plate 6 is attached to the upper part of the.

In the first and second embodiments, the electric fan is controlled so that its motor automatically rotates when the door is opened. That is, as shown in FIG. 5, the battery 7 and the switch 8 are installed in the cab. Reference numeral 9 is a normally open contact, and 10 is an electric fan. Although not shown, when the door is opened, the normally open contact 9 is closed and the electric fan 10 is rotated.

[0011]

【effect】

 At the upper corner of the door opening, the discharge port is located slightly inward from the vertical line, so when the door is opened, the air flow from the electric fan is mostly toward the inside of the refrigerator, Can be prevented from flowing out of the warehouse.

Further, by covering about 1/3 of the height of the door opening with a cover, a synergistic effect with the effect of the axial fan can be exhibited.

Further, an electric fan with a discharge port facing downward and an electric fan that discharges upward on the floor by facing the electric fan are installed at the upper corners of the opening of the door. By arranging the discharge ports of the electric fan and the electric fan at a small distance L, it is possible to form two layers of air-curtains having different flow directions from each other, so that cold air in the cold air can flow out of the cold air. It can be shut off completely and the temperature of the loaded luggage can be maintained at the set temperature even when the door is opened.

[Brief description of drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view of the second embodiment.

FIG. 3 is a detailed view of the floor of FIG.

FIG. 4 is a detailed view of an electric fan on the floor and its outlet.

FIG. 5 is a wiring diagram.

FIG. 6 is a perspective view showing a cold air outflow prevention method using a known cart.

[Explanation of symbols]

 1 Electric Fan 2 Discharge Port 3 Carten 4 Floor Rail 5 Protective Box 6 Lid Plate 7 Battery-8 Switch 9 Normally Open Contact 10 Electric Fan

Claims (3)

[Scope of utility model registration request] 1. A van-type refrigerating vehicle, wherein an electric fan is installed at an upper corner of the door opening so that the discharge port is inclined slightly inward. Air-curtain device. 2. A carten is stretched above the door opening in the vertical direction of the opening.
Air-curtain device at the opening of the luggage box of the van type refrigeration vehicle. 3. A van type refrigeration vehicle, wherein a first electric fan (1a) having a discharge port facing downward is provided in an upper corner portion of a door opening.
And a second electric fan (1b) facing the first electric fan and having a discharge port facing upward, provided below the floor surface, and the first electric fan (1a) and the second electric fan (1b) The air-curtain device for the opening of the luggage box of the van type refrigerating vehicle according to claim 1, wherein the discharge ports of and are installed at a small distance (L) in the front-back direction of the luggage box.