JPH05788Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air cooling structure for a cooling unit built into a refrigerating device such as a vending machine or a show case.

[Conventional technology]

As is well known, vending machines that sell cold products or relatively small show cases have built-in cooling units to keep the products cold. In this case, the condensing unit of the freezer, which consists of an assembly of a compressor, a condenser, and a cooling fan, is housed in a machine room defined at the bottom of the cabinet. Outside air is ventilated into the machine room to cool the condensing unit.

On the other hand, when installing vending machines and show cases on-site, it is often the case that the cabinet is pressed against the wall of the building due to space limitations. There are many front suction/front exhaust systems in which outside air is sucked into the machine room from the front side, cools the condensing unit, and then is exhausted again from the front of the cabinet in a U-turn style (for example, Japanese Utility Model Publication No. 58-33977). It has been adopted.

[The problem that the idea aims to solve]

By the way, in the above-mentioned front suction/front exhaust system, the exhaust hot air whose temperature has increased while flowing through the machine room is blown out to the front side of the cabinet, which not only causes discomfort to customers using vending machines, but also causes problems with the cabinet. As a countermeasure to this problem, the front suction/rear exhaust system, in which cooling air sucked in from the front side of the cabinet and exhausted from the rear side of the machine room to behind the cabinet, was reconsidered. It's starting to become easier.

However, as mentioned above, for stand-type refrigeration equipment such as vending machines and show cases, due to constraints on the installation location, it is important to ensure a sufficient exhaust ventilation path between the back of the cabinet and the wall of the building. In many cases, it is difficult to do so, and axial flow fans with low static pressure are generally used as cooling fans built into condensing units. It is difficult to secure sufficient ventilation for the cooling fan, and short circuit ventilation occurs in which part of the heated exhaust gas is not exhausted outside the machine room but returns to the suction side of the cooling fan within the machine room.
Moreover, when such a short circuit occurs, the condensation temperature in the condenser increases, causing operational problems such as increasing the load on the compressor.

The present invention was developed in consideration of the above points, and is aimed at the above-mentioned front suction/rear exhaust type wind cooling structure, and is designed to provide a sufficient clearance between the back of the refrigeration equipment cabinet and the wall of the building. To provide an air-cooling structure for a cooling unit that can effectively air-cool a condensing unit by preventing the generation of a ventilation short circuit in a machine room even when the airflow cannot be ensured.

[Means to solve the problem]

In order to solve the above problems, the air cooling structure of the present invention has an air exhaust port opened on the back side of the machine room, and an exhaust fan is installed in the exhaust plenum formed in this part in series with the cooling fan. It shall be composed of:

[Effect]

With the above configuration, two fans, a cooling fan and an exhaust fan, are lined up in series between the outside air intake and exhaust ports that open on the front and back sides of the machine room. The outside air sucked into the room cools the condensing unit and then is forced into the exhaust plenum by the exhaust fan, increasing the static pressure inside the plenum. Therefore, even if there is a narrow gap between the exhaust port and the wall of the building facing behind it, the exhaust air will not return to the machine room and go through the seaway circuit, and will be able to flow through the passage between the building wall and the building wall. Exhaust is ensured to the outside. Therefore, the condensing unit housed in the machine room can be effectively cooled with air.

〔Example〕

FIGS. 1 and 2 show the air cooling structure of a cooling unit according to an embodiment of the present invention, which is intended for use in a vending machine. In the figure, 1 is a cabinet of a vending machine, 2 is a front door thereof, and 3 is a machine room defined at the bottom of the cabinet 1. Inside the machine room 3 are a compressor 4, a condenser 5, a cooling fan 6, Base 7
Condensing units 8 of refrigerators installed side by side on the top are housed.

On the other hand, an outside air intake port 9 is opened in the front door 2 on the front side of the machine room 3, and an exhaust port 10 is opened on the back side, and a fan panel 11 and an exhaust fan 12 are installed inside the exhaust port 10. Install and exhaust port 10
An exhaust plenum 13 is defined between the two. Note that 14 is a wind shield plate provided on the inlet side of the condenser 5;
is a protruding portion that protrudes toward the rear side of the cabinet 1 to ensure a gap 17 between it and the wall surface 16 of the building that will serve as an exhaust ventilation path.

With this air cooling structure, when the cooling fan 6 and exhaust fan 12 are operated during operation of the cooling unit, the outside air sucked into the machine room 3 from the front suction port 9 by the cooling fan 6 is condensed as shown by the dotted arrow. The container 5 and compressor 4 are ventilated to cool them.
Furthermore, the exhaust gas whose temperature has risen is sucked into the exhaust fan 12 and forced toward the exhaust plenum 13 to increase the static pressure within the plenum chamber.
As a result, the exhaust gas is forced to flow out from the plenum 13 through the exhaust port 10 of the cabinet 1 toward the gap 17 between the plenum 13 and the wall 16 of the building facing behind it. Further, the exhaust gas discharged into the gap 17 bypasses the top or side surface of the cabinet 1 and is dissipated to the surroundings. Moreover, in this case, since the gap 17 on the back side and the suction port 9 that opens on the front side of the cabinet 1 are far apart, the heated exhaust gas does not return to the suction port 9 as it is, and thus condensing The unit 8 can be effectively air-cooled.

Furthermore, according to the ventilation tests conducted by the inventor, it was necessary to maintain a gap 17 of at least 100 mm between the cabinet 1 and the rear wall 16 with the conventional air-cooled structure. It has been confirmed that with the invented air cooling structure, the gap on the back side can be reduced to about 20 mm to obtain the same air cooling effect.

[Effect of idea]

The wind cooling structure of the present invention is configured as explained above. It has the following effects.

In other words, by constructing an exhaust plenum at the exhaust port opening on the back side of the machine room and installing an exhaust fan in series with the cooling fan built into the condensing unit, the outside air sucked in from the front side can be removed. Even if there is a narrow gap between the cabinet and the wall of the building facing behind it, the cooling unit can be operated without short circuiting the exhaust air, and even if the clearance between the cabinet and the wall of the building facing the rear is narrow due to the installation location of the refrigeration equipment. Can be effectively air-cooled.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are a vertical side view and a cross-sectional plan view showing the configuration of an air cooling structure according to an embodiment of the present invention for a vending machine. In each figure, 1... Cabinet, 3... Machine room, 4... Compressor, 5... Condenser, 6... Cooling fan, 8...
Condensing unit, 9...Outside air inlet, 1
0...exhaust port, 12...exhaust fan, 13...exhaust plenum.

Claims (1)

[Scope of utility model registration request] This is an air-cooled structure for the cooling unit built into refrigeration equipment such as vending machines and show cases.The condensing unit, which consists of an assembly of a compressor, condenser, and cooling fan, is placed in the machine room of the refrigeration equipment cabinet, and the front In a device that cools the condensing unit by blowing outside air sucked in from the side into the machine room, an air exhaust port is opened on the back side of the machine room, and the cooling fan is installed in the exhaust plenum formed in the back side of the machine room. An air cooling structure for a cooling unit in a refrigeration equipment characterized by an exhaust fan installed in series with a cooling unit.