JPS6033475A - Refrigerating showcase - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a fan for circulating cold air in a cooling device used in a refrigerated showcase.

Structure of the conventional example and its problems FIGS. 1 to 4 show a conventional refrigerated showcase. The configuration of this conventional example is shown below in Figures 1 to 4.
This will be explained with figures.

2'- In the figure, 1 has a storage chamber 2. Cooling room 3゜Machine room 4
This is the main body of the refrigerated showcase formed by the following. The storage room 2 has a transparent door 5 that opens and closes an opening 6' formed on the front side.
, transparent left and right side walls 6, 6', back wall 7, top wall 8, bottom plate 9, and four supports 1oa, 10b, 10C910d.
It is composed of and a side wall 6.6', a back wall 7.
Ceiling wall 8. The bottom plate 9 supports the supports 10a, 10b, 10c.
, 10d to form a storage chamber 2. Also,
The cooling chamber 3 is located below the bottom plate 9 and is thermally separated from the machine room 4 by a container-shaped bottom wall 11 made of a heat insulating material. In the cooling chamber 3, there is a compressor 12° condenser 1.
3. Dryer 14. Capillary tube 16. Evaporator 1
An evaporator 16 of the cooling system is installed, and two fans 17 and 17' for forcibly circulating cold air into the storage chamber 2 are installed on the leeward side of the evaporator 16.

The bottom plate 9 is provided with a discharge port 18 and a suction port 19, and the discharge port 18 and the suction port 19 are opened along the side walls 6, 6' that do not face the door 6. The fans 17 and 17' are arranged near the outlet 18 and parallel to the outlet 18.

The machine room 4 is located at the lower part of the main body 1, and contains the compressor 12 of the cooling system. Capacitor 13° Dryer 1
4. A capillary tube 16 is installed. and,
A condenser fan 2o is installed in the machine room 4 to improve heat radiation from the machine room 4. The outer circumferences of the cooling chamber 3 and the machine chamber 4 are covered with a grille 21 having slits 21'. A drain pan 22 drains the drain water from the evaporator 16 into a drain hole 23. It is received in the drain pan 22 via the drain tube 24. Further, casters 25 are provided at the lower part of the machine room 4 to enable transportation.

Next, the electric circuit will be explained. The fans 17 and 17' are connected to the power supply in the 1Ys row, and the condenser fan 20 degrees and the compressor 12 are connected to the thermostat 26 for temperature control in the storage room 2.
connected in series to the power supply via. The heat sensitive part 2s/ of the thermostat 26 is fixed so as to be in thermal contact with the evaporator 16.

Next, the operation of the above conventional example will be explained. When the thermostand 26 is turned on, the compressor 12 of the cooling system is activated to compress and circulate the refrigerant sealed within the cooling system. Then, it is condensed in a condenser 13, passed through a dryer 14, depressurized in a capillary tube 15, and evaporated in an evaporator 16, thereby cooling the evaporator 16. At this time, fan 17
, 17' are continuously energized, so that cold air flows through the discharge port 18.
It is then sent to the storage room 2. This cold air cools the products in the storage room 2. And thermostat 2
The product was kept cool at a constant temperature by the 0N-OFF control in No. 6.

However, not only do these fans 17, 17' require electric power to rotate, but also the fans 17, 17'
The heat generated by the compressor 12 becomes a heat load on the compressor 12 of the cooling system, increasing the operating rate of the compressor 12, resulting in a double loss in terms of electricity bill. In addition, even during non-selling hours such as nighttime, the products are kept cool at the same temperature as during selling times such as daytime, which results in a waste of electricity.

Purpose of the Invention The present invention eliminates the drawbacks of the above-mentioned conventional example, and uses a changeover switch to change the operation status of the cool air circulation fan between when the product is sold and when the product is stored, such as at night.
The purpose is to save electricity.

Structure of the Invention In order to achieve the above object, the present invention provides a switch for ON-OFF control of at least one of a plurality of fans, and changes the number of operating fans depending on the sales time. When the amount is small, power-saving operation is possible.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, and components that are the same as those of the prior art will be given the same numbers and detailed explanations thereof will be omitted.

Reference numeral 27 denotes a changeover switch that is connected in series with the fan 17' on the opposite side of the door 5 and can be operated arbitrarily. The changeover switch 27 is installed on the outer shell of the main body 1, and is set to 0 according to the will of the installer.
It is designed to be turned off.

6. - Next, we will explain the operation of the above embodiment. During normal sales, if the selector switch 27 is turned on, multiple fans 1
7 and 17' are operated together to cool and keep the products in the storage room 2 cold. Next, when sales are stopped at night or when the sales volume is low, the selector switch 27' (HOFF) is turned off. At this time, one fan 17' is completely stopped. Therefore, the cool air passing through the evaporator 16 is turned off. Since the amount of heat exchanged by the evaporator 16 is reduced by about half, the temperature of the evaporator 16 becomes lower than before.As a result, the heat sensitive part 26 of the thermostat 26 that is in thermal contact with the evaporator 16 As the temperature of ' falls, the thermostat 26 is turned off in a shorter time than before. This lowers the operating rate of the compressor 12 and saves electricity.
Since the fan 17 on the front door 5 side is constantly rotating, the products on the door 5 side are sufficiently cooled compared to the products on the back wall 7 side, so there is no chance that the products will not be cold when sales start. do not have. Also, from the standpoint of noise, it is desirable to have low noise, especially at night, and by reducing the number of fans in the refrigerator to one, it is possible to achieve low noise levels.

Effects of the Invention As is clear from the above embodiments, the present invention reduces the input area to the fans and the heat generated by the fans by stopping the fans other than those on the door side among the plurality of fans when sales are small, such as at night. It is possible to save electricity. In addition, since air is continuously blown only on the door side, the products can be sold sufficiently cooled at the time of sale. Further, although it is desirable to reduce the noise level especially late at night, reducing the number of operating fans has the advantage that the noise level can be reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional refrigerated showcase, Fig. 2 is a central sectional view of Fig. 1, Fig. 3 is a diagram of the cooling system of Fig. 1,
4 is an electric circuit diagram of FIG. 1, FIG. 6 is a perspective view of a refrigerated showcase showing an embodiment of the present invention, FIG. 6 is a central sectional view of FIG. 5, and FIG. 7 is a diagram of the same. FIG. 5 is a diagram of the cooling system, and FIG. 8 is an electrical circuit diagram of FIG. 6. 2...Storage room, 5...Opening, 6, 6'
... Left and right side walls, 7 ... Back wall, 8 ...
...Top wall, 11...Bottom wall, 16...Evaporator, 17.17'...Fan, 27...
・Selector switch. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 ri size＼, Figure 5 0c 25°Question 6

Claims (1)

[Claims] A storage room equipped with a door covering an opening formed in the front, a cooling room equipped with an evaporator and a plurality of fans that forcefully circulate cold air into the storage room, and a cooling room and a storage room except for the door side. and a switch for arbitrarily stopping at least one of the plurality of fans, and of the plurality of fans, the fan that blows air to the storage compartment portion on the door side is continuously operated. A refrigerated showcase.