JPS6230709Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a ventilation system for a container refrigerator, more specifically, a ventilation system for a container refrigerator that has a main body casing with an air passage leading to the cooling chamber and a back plate attached to the inside of the cooling chamber. Regarding equipment.

Conventionally, a ventilation system for this type of container refrigerator has been provided with an intake port that opens to the outside on the suction side of a fan installed in the cooling chamber, and an exhaust port that is arranged in parallel near this intake port to remove the exhaust gas. An exhaust pipe such as a vinyl tube that opens into an air passage communicating with the inside of the refrigerator is connected to the outlet of the fan on the blowing side, and a part of the air blown from the fan is taken into the pipe using a static pressure difference. The exhaust port is configured to exhaust the air to the outside from the exhaust port.

As mentioned above, the purpose of using an exhaust pipe is to place the intake and exhaust ports close together so that they can be opened and closed using a single damper device. According to the conventional ventilation system used, this exhaust pipe largely blocks the cooling chamber, and furthermore, the outer surface of this exhaust pipe and the part where the pipe is fixed by the clamp member form a large resistance surface to the flow of air. As a result, air resistance became extremely large, and the service space in the cooling room became narrow, reducing serviceability.To solve these problems, we proposed the ventilation system shown in Figure 6. , filed as Utility Application No. 117012/1983. This ventilation system is provided with an intake port 54 that opens to the outside on the intake side of a fan 42 installed inside the cooling room 4, and a partition wall 5
2 is provided with an exhaust port 55 that opens to the outside and the inside of the refrigerator, while the wall 51 on the inside of the refrigerator in the machine room 6 is provided with an
A recess 5 that communicates with the exhaust port 55 and the air passages 53, 53 that communicate with the cooling chamber 4 on the side of the machine room 6.
6, 56, and the recesses 56, 56 and the opening of the exhaust port 55 on the inside of the refrigerator are formed by a back plate 7 attached to the inside of the cooling chamber 4 to form an exhaust duct.

However, not only in the conventional example described above but also in the previously proposed ventilation system, only a static pressure difference is used to introduce a part of the blown air passing through the air passage 53 into the exhaust pipe or exhaust duct. ,
There was a problem with insufficient ventilation.

Therefore, in order to increase the ventilation amount in the above configuration, it is necessary to increase the motor capacity or fan diameter of the fan 42 to increase the air volume and increase the static pressure difference, or to increase the passage cross-sectional area of the exhaust pipe or exhaust duct. However, according to the former method, the fan 42 becomes larger and heavier, requiring a correspondingly larger installation space and greater installation strength, and the fan 42 becomes a state of excessive equipment during non-ventilation. On the other hand, according to the latter, if the passage cross-sectional area of the exhaust pipe is increased, the space inside the cooling chamber becomes smaller, and also, if the passage cross-sectional area of the exhaust duct is increased, there is a problem. For example, since it is necessary to increase the thickness of the partition wall 52, there is a problem that the machine room 6 becomes narrow or the wall 51 protrudes into the refrigerator, resulting in an increase in external dimensions.

The purpose of this invention is to reduce the dynamic pressure of the air flowing through the air passage even at a predetermined static pressure difference without increasing the fan motor capacity or fan diameter, and without increasing the cross-sectional area of the exhaust port. The purpose is to use it for ventilation so that the desired amount of ventilation can be carried out from the exhaust port.

The configuration of the present invention is a ventilation system for a container refrigerator, which includes a main body casing having an air passage communicating with a cooling chamber and opening into the refrigerator, and in which an evaporator and a fan are installed in the cooling chamber. The main body casing includes an inlet having one end open to the suction side of the fan and the other end opening to the outside, and an exhaust port having one end opening to the blowout side of the fan 42 and communicating with the air passage, and the other end opening to the outside. At the same time, a guide plate for guiding air flowing through the air passage to the exhaust port is provided at a communication portion of the exhaust port to the air passage, and the specifications of the fan and the air passage on the side of the machine room are adjusted. The present invention is characterized in that a desired amount of ventilation can be achieved without changing the specifications of the cross-sectional area of the passageway of the exhaust port opening in the air.

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

A container refrigerator 1 equipped with a ventilation system according to the present invention is used by being disposed in the front part of a freezer 3 in a refrigerated container 2, as shown in FIG.
The refrigerator 1 has a cooling chamber 4 open to the freezer 3 at the top, and a wall 5 at the bottom facing the freezer 3.
1, the main body casing 5 is provided with a machine room 6 having a
are defined by a partition wall 52, and air passages 53, 53 for cooling air communicating between the cooling chamber 4 and the freezer 3 are provided on both sides of the machine room 6, as shown in FIG. is forming. In addition, the cooling chamber 4
A back plate 7 having an inlet 71 is attached to the side of the freezer 3, and the air inside the freezer 3 flows into the cooling chamber 4 through the inlet 71.

In the cooling chamber 4, an evaporator 41 is provided below the inlet 71, and fans 42, 42 are provided below the evaporator 41 at positions facing the upper portions of the air passages 53, 53. In the machine room 6, a compressor, a condenser, an accumulator, etc. (not shown) are arranged.

The main body casing 5 of the refrigerator 1 is composed of a heat insulating layer 5a made of hard urethane foam or the like, and a frame layer 5b surrounding the heat insulating layer 5a and made of FRP or the like.

Therefore, the ventilation system of the present invention has the above-mentioned refrigerator 1.
A suction port 5 is provided in the main body casing 5, one end of which opens to the suction side of the fan 42, and the other end of which opens to the outside.
4, and an exhaust port 55 whose one end is connected to the air passages 53, 53 on the blowing side of the fan 42 and whose other end is open to the outside, and the exhaust port 55 is connected to the air passage 53. In the part, the air passage 5
A guide plate 8 is provided to guide the air flowing through the exhaust port 33 to the exhaust port 55.

What is shown in FIGS. 1 to 3 is the suction port 5.
4 is disposed above the upper end surface of the partition wall 52 between the two fans 42, 42 in the main body casing 5, and the exhaust port 55 is disposed above the upper end surface of the partition wall 52.
4 is disposed on the partition wall 52 below the wall 5.
Recesses 56, 56 extending from the exhaust port 55 to the left and right sides and reaching the air passages 55, 53 are provided on the back surface of the refrigerator 1, and the recesses 56 and the chamber side open portion 57 of the exhaust port 55 are connected to the back surface of the refrigerator. It is closed by the plate 7 to form an exhaust duct, and at each communicating portion of the exhaust duct to the air passages 53, 53, the end side of each upper wall surface of the recesses 56, 56 is curved upward to form an exhaust duct. Air passages 53, 53 along the end sides
Guide surface 5 for air flowing into the recesses 56, 56 from
8, 58, and mounting plates 9, 9 are attached, and the guide surfaces 58, 58 are attached to the mounting plates 9, 9.
The guide plates 8, 8 are placed below the guide surfaces 58, 58.
The opening can be adjusted freely.

As shown in FIGS. 3 and 4, the mounting plates 9, 9 have a fan-shaped plate shape with a mounting portion 91 attached to the end side edge of the recessed portion 56 by bolts _B1 , and from the mounting portion 91, the air passage 53 direction. It has an adjustment part 92 which is bent inward and placed along the inner surface of the recess 56 with the main part of the fan facing downward and inward. Along with protruding,
An arcuate guide hole 92a centered around the pivot shaft 93 is formed in the fan periphery of the adjustment portion 92.

Further, the guide plate 8 has an upper surface curved downward in a concave shape, and a receiving portion 81 for the pivot shaft 93 is provided at the base of the lower surface, and the guide hole 92a is provided at the free end side of the lower surface. A guide rod 82, which supports the guide plate 8 on the mounting plate 9, is fixed by a wing nut _B2 . Then, the guide plate 8 is configured by fitting the pivot shaft 93 into the receiving part 81 and swingingly adjusting the opening with the guide surface 58 to a desired value, so that the circulating air in the air passage 53 is stabilized from this opening. This is done by making use of not only pressure but also dynamic pressure to conduct air within the recess 56. In order to be able to perform the adjustment operation from the front of the refrigerator 1,
A service hole S is provided as shown by the chain line in FIG.

In addition, as shown in the drawing, there is a
A lid 58 is attached to adjust the opening degree of the intake port 54 and the exhaust port 55, and the partition wall 52
A recess is formed in the upper part of the drain pan 52a, 52.
A is provided.

The cold air in the container refrigerator 1 constructed as described above flows in the direction of the arrow shown in the drawing. That is, the cold air that has flowed from the freezer 3 into the cooling chamber 4 through the inlet 71 is cooled by the evaporator 41 and flows downward.
2, 42, the air passage 5
3, 53 and circulates as if blowing out to the bottom of the freezer 3.

When the intake port 54 and the exhaust port 55 are opened for ventilation, the following airflow is formed.

That is, since the suction port 54 is provided on the suction side of the fan 42, outside air flows into the cooling chamber 4 from the suction port 54.

On the other hand, the exhaust port 55 communicates from the blowing side of the fan 42 through the air passages 53, 53, and from the openings of the guide plates 8, 8 and the guide surfaces 58, 58 through the recesses 56, 56. , said fan 42
The cold air that has passed through is discharged to the outside of the machine from the exhaust port 55.

Therefore, when ventilating the cabin, the amount of air ventilated from the exhaust port 55 depends on the static pressure difference between both ends of the recesses 56, 56, depending on the size of the opening between the guide plate 8 and the guide surface 58. The amount of air is the sum of the amount of air corresponding to the dynamic pressure of the circulating air in the air passages 53, 53 conducted from the openings into the recesses 56, 56.

Therefore, without increasing the motor capacity of the fan 42, without increasing the fan diameter, and without increasing the passage cross-sectional area of the recesses 56, 56,
This allows for sufficient ventilation.

As described above, the present invention is a main casing 5,
An intake port 54 having one end opening to the intake side of the fan 42 provided in the cooling chamber 4 and the other end opening to the outside, and an exhaust port 5 having one end on the blowing side of the fan 42, provided on the side of the machine chamber 6, communicating with an air passage 53 leading from the cooling chamber 4 to the inside of the cabinet, and the other end opening to the outside.
5 and an air passage 53 of an exhaust port 55
Since the guide plate 8 for guiding the air circulating through the air passage 53 to the exhaust port 55 is provided at the communicating portion to the exhaust port 55,
Since the circulating air is guided by the guide plate 8 to the exhaust port 55, the air can flow from the air passage 53 to the exhaust port 55 without increasing the motor capacity and the fan diameter of the fan 42 and without increasing the passage cross-sectional area of the exhaust port 55 opening into the air passage 53.
This allows enough air to be taken in for ventilation.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional side view showing an embodiment of the ventilation system of the container refrigerator of the present invention, Fig. 2 is a schematic longitudinal cross-sectional rear view, Fig. 3 is an explanatory diagram showing the main parts, and Fig. 4 is the main parts. FIG. 5 is an explanatory diagram showing the relationship between the exhaust port, the air supply port and the lid, and FIG. 6 is an explanatory diagram showing a conventional example. 4... Cooling chamber, 41... Evaporator, 42... Fan, 5... Body casing, 53... Air passage,
54...Intake port, 55...Exhaust port, 8...Guidance plate.

Claims (1)

[Scope of utility model registration request] A ventilation system for a container refrigerator, comprising a main body casing 5 having an air passage 53 communicating with the cooling chamber 4 and opening into the inside of the container, and having an evaporator 41 and a fan 42 installed in the cooling chamber 4, The main body casing 5 has an inlet 54 which has one end open to the suction side of the fan 42 and the other end to the outside, and one end which is connected to the air passage 53 at the blowout side of the fan 42 and the other end to the outside. The exhaust port 55 is provided with an exhaust port 55 that opens to the air passage 55, and a guide plate 8 is provided in a communication portion of the exhaust port 55 with the air passage 53 to guide the air flowing through the air passage 53 to the exhaust port 55. Ventilation system for container refrigerators.