JPS634092B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-store ventilation system for a store, particularly a large store, equipped with a frozen/refrigerated store case, particularly a multi-stage open store case.

Conventionally, in supermarkets that are equipped with large numbers of frozen and refrigerated show cases, especially multi-stage large open show cases, the condensers in the shop case cooling system are installed outdoors, and the freezers are installed in a machine room located in a part of the store. The cooling system is arranged such that the main body of the case is equipped with a refrigerant evaporator, and piping is run between them to form a refrigerant circuit.

FIG. 1 is a schematic diagram showing an example of the arrangement of equipment in a store. In the figure, 1 is a store, 2 is an outer wall, 3 is a roof, 4 is a ceiling, and 5 is a refrigerant evaporator 501. 6 is a machine room in which a refrigerator 7 and a control box 8 are placed; 9 is a radiator including a condenser and a fan;
10 is an air conditioner, 11 is an outdoor unit for the air conditioner, and 12 is a product display stand.

The air conditioner 10 may be installed in the machine room 6.

By the way, in the arrangement of the equipment as described above, it is necessary to connect the refrigerant evaporator 501 of the case 5, the refrigerator 7, and the radiator 9 with the pipe 13 in order to flow the refrigerant. Therefore, when installing a freezing/refrigerating case, on-site work such as piping is required.
Not only is the installation work difficult, but the capacity of the cooling system itself is dependent on on-site work at the time of installation.

The area of the machine room is approximately 1.5 to 2.0% of the store area.
This is the reason why the sales floor space is so narrow.

In order to eliminate these traditional drawbacks,
It is conceivable to use a cooling system in which not only the refrigerant evaporator but also a radiator and a refrigerator are all built into the lower part of the case body. However, in that case, heat from the radiator accumulates inside the store, which is inconvenient.

The present invention aims to provide an in-store ventilation system that makes it possible to use a freezer/refrigerator open store case with a built-in cooling system while achieving the energy saving requirements by effectively utilizing waste heat from such a radiator. purpose.

The present invention consists of a multi-tiered open store case with a built-in cooling system for freezing and refrigerating, which is installed with a space left for an air passage on the wall of the store, and an air blower that communicates with the attic through an opening provided in the ceiling above the air passage space. It has an intake port with a shutter that communicates the store with the outside, a ventilation port that communicates the above-mentioned attic space with the outside, and a ventilation fan with a shutter installed in the ventilation port. When the shutters are closed, the exhaust heat from the cooling system is used for heating the store, and at other times, the ventilation fan is operated to exhaust the exhaust heat through the attic, and at the same time, outside air is introduced from the intake port. This is an in-store ventilation system for stores equipped with freezer and refrigerated storage cases.

According to the present invention, since a show case with a built-in cooling system can be used, installation is easy, and a machine room is not required, so the sales floor area can be expanded. Furthermore, in the present invention, waste heat from the cooling system of the show case is used for heating the store, so energy for heating is not needed or is reduced.
Energy savings are achieved, but above all, in consideration of the rise in store temperature due to the rise in attic temperature during spring, summer, and fall, ventilation is carried out in the attic and inside the store without being affected by the rising airflow caused by the heat of the cooling system. This prevents the temperature from rising in the attic and inside the store, making it possible to shorten the period during which the store is cooled and lower the operating rate during cooling, thereby achieving energy conservation requirements.

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

In FIG. 2, parts similar to those in FIG. 1 are designated by the same reference numerals.

This embodiment omits the installation of a machine room for the cooling system in the store, and uses a multi-stage open show case 51 that incorporates not only the evaporator but also the cooling system of the compressor 52, blower 53, and condenser 54. is used.

The show case 51 is installed with a space 61 for air passage left open against the interior wall of the store.
An opening 62 is formed in the ceiling above the store 1 to communicate the store and the attic. A hole communicating with the outside air is provided in the attic wall, and a ventilation fan 63 with a shutter is provided in the hole. A higher location in the attic is better for this location. It is preferable to provide a partition plate 64 in the attic to partition the attic space into a plurality of upper and lower layers. Note that each partition plate 64 has ventilation holes or ventilation gaps 6.
5 and install it.

When the distance between the top surface of the show case 51 and the ceiling 4 is large, it is preferable to provide a partition wall 67 extending from the top surface of the show case toward the ceiling 4 and leaving a ventilation path 66 between its tip and the ceiling 4.

Further, an air intake port 71 for communicating the inside of the store with outside air is provided on the outer wall 2 of the store, and a filter 72 and a shutter 73 are installed in the air intake port 71.

In such a store, heat is dissipated from the compressor 52 and condenser 54 while the freezer/refrigerator case 51 is in use. This heat is sent to the upper part of the show case by the blower 53 through the air passage space 61 on the back of the show case.

In winter, when heating is required, if the shutter of the ventilation fan 63 and the shutter 73 of the intake port are closed, air with exhaust heat from the cooling system will flow into the ventilation passage 6.
6, the interior of the store is circulated and heated as shown by the solid line, and the air blower 53 is used again to heat the store case 5.
Return to the bottom of 1. Therefore, since the exhaust heat of the cooling system of the shop case 51 is used as a heat source for heating the store, heating operation of the air conditioner 10 is not required, but its operating rate can be lowered. Therefore,
Energy consumption associated with heating can be saved.

Next, when neither heating nor cooling is necessary, such as during spring, autumn, or summer nights, the shutter 73 of the intake port 71 is
Open the shutter of the ventilation fan 63 and turn on the ventilation fan 63.
When it is operated, outside air enters through the intake port, as shown by the dashed line, and the air inside the store carries the waste heat from the cooling system out through the ventilation space 61, the opening 62, and the attic through the ventilation fan 63. thus,
The temperature inside the store is adjusted to match the outside temperature.

Furthermore, on summer nights, it is preferable to provide a night cover to the open shower case, as this will reduce the operating rate of the cooling system.

Generally, the temperature in the attic is high due to radiation from the sun-irradiated roof 3, which causes the temperature inside the store to rise through the ceiling, forcing the air conditioner 10 to operate in a cooling manner even in spring and autumn. However, according to the present invention, the air inside the store enters the attic,
Since the air in the attic is exhausted together with the ventilation fan, the attic is constantly ventilated and the temperature rise mentioned above is prevented. Therefore, the operating rate and operation period of the air conditioner can be shortened.

When cooling is required in the summer, as in the case of spring and autumn described above, the air conditioner 10 can be operated for cooling while taking in outside air from the intake port 71 and exhausting the store air and attic air from the ventilation fan, that is, ventilation. . However, in this case, if the exhaust volume of the ventilation fan 63 is greater than the volume of air blown by the fan 53 of the cooling system, the amount of humid air taken in through the intake port 71 will increase, resulting in a large cooling load. It is better to reduce the amount. In this way, the attic will be ventilated, and the rise in temperature in the attic will be suppressed, thereby suppressing the rise in temperature inside the store due to the rise in the attic temperature. In addition, at this time, the cooling system does not exhaust enough heat, and some of it circulates inside the store, but the air that carries it is the air inside the store that has been cooled, and since the humidity is low, the humid outside air The cooling load is smaller than when a large amount of air is taken in.

In addition, according to the above embodiment, the partition plate 6 is installed in the attic.
4, it blocks radiant heat from the roof and convection in the attic, which has the advantage of suppressing the temperature rise in the ceiling 4.

As described above, according to the present invention, the use of a freezing/refrigerating case with a built-in cooling system has the advantage of eliminating the need for on-site construction such as piping, facilitating installation, and increasing the sales area.
It is possible to realize a ventilation air conditioning system for supermarkets, etc. that saves energy consumption for heating and cooling.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the layout of a conventional supermarket, including a freezer/refrigerator case and an air conditioner, and FIG. 2 is a diagram showing an embodiment of the present invention. 1... Store, 2... Wall, 3... Roof, 4... Ceiling, 5
1... Freezer/refrigerated multi-stage open case with built-in cooling system (showcase), 52... Compressor,
53...Blower, 54...Condenser, 61...Air path space, 62...Opening, 63...Ventilation fan with shutter, 71...Intake port, 73...Shutter.

Claims (1)

[Claims] 1. A multi-stage open store case with a built-in cooling system for freezing and refrigerating, which is installed with a space left for the air passage on the wall of the store, and an air passage that communicates with the attic through an opening provided in the ceiling above the air passage space. It has an intake port with a shutter that communicates the store with the outside, a ventilation port that communicates the above-mentioned attic space with the outside, and a ventilation fan with a shutter installed in the ventilation port, and during heating, the shutters of the ventilation fan and the intake port are When closed, the exhaust heat from the cooling system is used for heating the store, and at other times, the ventilation fan is operated to exhaust the exhaust heat through the attic, and at the same time, outside air is introduced through the intake port. An in-store ventilation system for a store equipped with freezer and refrigerated storage cases.