JP5652855B2 - Blower operating device and fan operating method - Google Patents

Description

  The present invention relates to a fan operating device and a fan operating method.

  In stores such as supermarkets and convenience stores, open showcases are used to display products such as refrigerated foods and fresh foods. The front face of the open showcase, that is, the front face of the merchandise display shelf is open, and the opening is covered with a cold air curtain by a cooler, so that the space of the merchandise display shelf is partitioned from the outside air.

  In such an open showcase, a cold aisle (cold air accumulation) is generated near the floor in front of the case as a passage due to the influence of the air curtain, which may cause discomfort to users such as customers. Therefore, in order to suppress this cold aisle, a technique has been proposed in which a fan is provided at the top of the open showcase and air is supplied from the ceiling to the floor side through the duct on the back of the case (for example, , See Patent Document 1).

JP 2002-228218 A

  However, in the above-described technology, the air flow is unidirectional from the ceiling side to the floor side, and when the temperature near the ceiling in the store is low, cold air is supplied to the floor, so cold It is difficult to reliably suppress the aisle. In particular, when the operation of the air conditioner for adjusting the temperature in the store is during the cooling operation, cold air is always supplied to the vicinity of the floor, so that it is more difficult to suppress the cold aisle.

  The present invention has been made in view of the above, and an object thereof is to provide a blower operating device and a blower operating method capable of reliably suppressing cold aisle generated in a showcase.

  According to a first aspect of the present invention, in the fan operating device, the front surface of the front of the showcase passes through the back and bottom surfaces of the showcase from the upper end of the back of the showcase capable of cooling the product by opening the front. In the air duct extending to the lower end, an operating device that operates a blower that generates an air flow by rotating blades, and the air conditioner is operated according to the operation of the air conditioner that adjusts the temperature in the store. The rotation direction of the rotor blades is reversed between the cooling operation and the heating operation.

  According to a second aspect of the present invention, in the fan operating device, when the operation of the air conditioner is a cooling operation, the rotation direction of the rotor blades is the direction in which air flows from the floor side to the ceiling side in the air duct. When the operation of the air conditioner is a heating operation, the rotation direction of the rotor blades is the direction in which air flows from the ceiling side to the floor side in the air duct.

  A third feature according to the present invention is that, in the fan operating device, the rotation direction of the rotor blades is switched according to a period corresponding to the season around the store.

  According to a fourth aspect of the present invention, in the fan operating device, the rotating blades are allowed to rotate only during the business hours of the store according to the business hours of the store.

  According to a fifth feature of the present invention, in the fan operating device, the first temperature sensor for measuring the temperature near the floor in front of the showcase is provided, and the temperature measured by the first temperature sensor is the first. If the temperature is higher than the first threshold, the rotor blades are stopped.

  According to a sixth aspect of the present invention, in the fan operating device, the second temperature sensor for measuring the temperature near the ceiling above the showcase is provided, and the temperature measured by the second temperature sensor is the second. If the temperature is lower than the second threshold, air flows in the direction of rotation of the rotor blades from the floor side to the ceiling side in the air duct. In the direction.

  According to a seventh aspect of the present invention, in the fan operating device, the first temperature sensor is an infrared sensor.

  An eighth feature of the present invention is that in the fan operating device, the second temperature sensor is an infrared sensor.

  According to a ninth aspect of the present invention, in the operation method of the blower, the front surface of the front of the showcase passes through the back and bottom surfaces of the showcase from the upper end of the back of the showcase capable of cooling the product by opening the front. In the air duct extending to the lower end, an operation method of operating a blower that generates air flow by a rotor blade, and the operation of the air conditioner is performed according to the operation of the air conditioner that adjusts the temperature in the store. The rotation direction of the rotor blades is reversed between the cooling operation and the heating operation.

  According to the first or ninth feature of the present invention, depending on the operation of the air conditioner, the rotation direction of the rotor blades is reversed between the case where the operation of the air conditioner is the cooling operation and the case of the heating operation. As a result, the air flow generated in the air duct is reversed in two directions according to the operation of the air conditioner and becomes two directions. Therefore, compared to the case where the air flow is one direction, the cold aisle generated in the showcase Can be reliably suppressed.

  According to the second feature of the present invention, when the air conditioner is in cooling operation, the rotation direction of the rotor blades is changed to the direction in which air flows from the floor side to the ceiling side in the air duct, and the air conditioner is in heating operation. In some cases, the rotation direction of the rotor blades is such that the air flows in the air duct from the ceiling side to the floor side. When the air conditioner is blown above the showcase and the air conditioner is in heating operation, the warm air existing above the showcase is blown out near the floor in front of the showcase. It can be surely suppressed.

  According to the third feature of the present invention, the direction of air flow generated in the air duct corresponds to the season such as summer or winter by switching the rotation direction of the rotor blades according to the period corresponding to the season around the store. Therefore, the cold aisle generated in the showcase can be more reliably suppressed.

  According to the fourth feature of the present invention, the operation of the blower 4 is stopped when the worker leaves the store or the like by allowing the rotation of the rotor blades only during the business hours of the store according to the business hours of the store. Even if this is forgotten, the blower 4 will not continue to operate outside of business hours, and wasteful operation of the blower 4 can be suppressed, thus realizing energy saving.

  According to the fifth feature of the present invention, it is determined whether or not the temperature near the floor in front of the showcase measured by the first temperature sensor is higher than the first threshold, and the temperature is the first If it is determined that the temperature is higher than the threshold value, the temperature near the floor in front of the showcase is prevented from becoming higher than necessary by stopping the rotor blades. Further, since the rotation of the rotor blades more than necessary is prevented, energy saving can be realized.

  According to the sixth aspect of the present invention, it is determined whether or not the temperature near the ceiling above the showcase measured by the second temperature sensor is lower than the second threshold value, and the temperature is the second If the air pressure is lower than the threshold value, the air is blown above the showcase by changing the direction of rotation of the rotor blades so that the air flows in the air duct from the floor side to the ceiling side. Therefore, it is possible to prevent condensation on the ceiling above the showcase and generation of mold.

  According to the seventh or eighth feature of the present invention, by using an infrared sensor as the first temperature sensor or the second temperature sensor, the infrared sensor can operate at room temperature, and is further simple and inexpensive. Therefore, it is possible to suppress the complexity and cost increase of the device configuration. In addition, since it becomes possible to measure the temperature of the distant object, the degree of freedom of the installation position of the temperature sensor can be improved.

It is a section side view showing the schematic structure of the showcase concerning one embodiment of the present invention. It is a block diagram which shows schematic structure of the centralized management system containing the showcase shown in FIG. It is a flowchart which shows the flow of the operation process of the air blower which the control apparatus with which the showcase shown in FIG. 1 is provided performs. It is a cross-sectional side view which shows the modification 1 of the showcase shown in FIG. It is a cross-sectional side view which shows the modification 2 of the showcase shown in FIG.

  An embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a showcase 1 according to an embodiment of the present invention includes a case body 2 having an open front surface, an air duct 3 provided on the outer surface of the case body 2, and an upper end portion of the air duct 3. A blower (fan) 4 provided in the control unit 5 and a control device 5 for controlling each part.

  The case main body 2 is a case that can display and cool a product (for example, refrigeration or freezing is possible). Inside the case body 2, a circulation fan 2a, a cold air duct 2b, a cooler 2c and the like are provided. The circulation fan 2a is provided in the lower part of the case body 2, the cool air duct 2b is provided on the back side of the case body 2, and the cooler 2c is provided in the cool air duct 2b.

  The cool air is sucked by the circulation fan 2a from the suction port H1 located at the lower front end of the case body 2, and then cooled by the cooler 2c, passes through the cool air duct 2b, and is positioned at the upper front end of the case body 2. The blowout outlet H2 is blown out as an air curtain so as to cover the front surface of the case body 2, and the cold air is again sucked from the suction port H1. In this way, the cold air circulates through the aforementioned path.

  The air duct 3 is a duct that extends from the upper end portion of the back surface of the case body 2 to the lower end portion of the front surface of the case body 2 through the back surface and the bottom surface of the case body 2. The air duct 3 is composed of a back duct 3a and a bottom duct 3b. The back duct 3a is a duct that is provided on the back surface of the case body 2 and extends in the vertical direction. The bottom duct 3b is a duct that is provided on the bottom surface of the case body 2 so as to communicate with the back duct 3a and extends in the front-rear direction. . Such an air duct 3 guides air from above the case body 2 to the vicinity of the floor in front of the case body 2, and conversely guides air from near the floor in front of the case body 2 to above the case body 2.

  The blower 4 is provided at the rear end of the upper surface of the case body 2, that is, at the upper end of the rear duct 3a so as to close the opening of the rear duct 3a. The blower 4 includes a rotatable rotor blade 4a, a drive motor (not shown), and the like. The rotor 4a is rotated by the drive motor to generate an air flow in the air duct 3 (in FIG. 1). See the black triangle arrow). The air flow direction can be changed by changing the rotation direction of the rotor blade 4a.

  Therefore, the flow direction from the ceiling side to the floor side (first flow direction) and the flow direction from the floor side to the ceiling side (second flow direction) are switched by reversing the rotation direction of the rotor blades 4a. It is done. The first flow direction is a direction in which air flows in the rear duct 3a from the ceiling toward the floor and flows in the bottom duct 3b from the rear to the front. The second flow direction is a direction in which air flows from the front to the back in the bottom duct 3b and flows from the floor to the ceiling in the back duct 3a.

  As shown in FIG. 2, the control device 5 includes a control unit 5a, an annual timer 5b, and a communication unit 5c. A first temperature sensor 6 and a second temperature sensor 7 are electrically connected to the control device 5. In addition, a centralized management device 8 that manages a plurality of showcases 1 in the store is connected to the control device 5 through a connection line such as a communication line so that communication is possible. The central control device 8 is electrically connected to an air conditioner 9 that adjusts the temperature in the store.

  As shown in FIG. 1, the control device 5 is built in the base portion at the lower end of the case body 2. The first temperature sensor 6 is provided at the lower part of the front surface of the case body 2 and measures the temperature near the floor on the front surface of the case body 2. The second temperature sensor 7 is provided on the ceiling surface above the case body 2 and measures the temperature near the ceiling above the case body 2. As the first temperature sensor 6 and the second temperature sensor 7, for example, an infrared sensor that measures the temperature of an object in a non-contact manner, a contact-type temperature sensor, or the like is used.

  The control unit 5a performs various controls (for example, synchronous control, temperature adjustment control, defrost control, etc.) related to the operation of the showcase 1. Further, the control unit 5a also controls the rotational speed and direction of the rotary blade 4a of the blower 4. The control device 5 including the control unit 5a functions as an operating device for the blower 4.

  For example, in order to suppress cold aisle, the control unit 5a, depending on the operation of the air conditioner 9, when the operation of the air conditioner 9 is a cooling operation and when the operation of the air conditioner 9 is a heating operation Thus, control is performed to reverse the rotation direction of the rotary blade 4a of the blower 4 (details will be described later).

  Moreover, in order to implement | achieve energy saving, the control part 5a determines whether the temperature of the floor vicinity of the case main body 2 front surface measured by the 1st temperature sensor 6 is higher than the preset 1st threshold value. If it is determined that the temperature is higher than the first threshold value, the operation of the blower 4, that is, the control of stopping the rotation of the rotary blade 4a is performed. As the first threshold value, for example, a temperature upper limit is set at which a customer passing through the passage on the front surface of the case body 2 does not feel uncomfortable.

  Further, the controller 5a is preset with a temperature in the vicinity of the ceiling above the case body 2 measured by the second temperature sensor 7 in order to prevent condensation on the ceiling above the case body 2 and generation of mold. When it is determined whether or not the temperature is lower than the second threshold value, and it is determined that the temperature is lower than the second threshold value, the air moves in the air duct 3 from the floor side to the ceiling side. Control the flow direction. As the second threshold value, for example, a temperature lower limit corresponding to a condition for suppressing condensation on the ceiling above the case body 2 and generation of mold is set.

  The annual timer 5b is a timer indicating an annual schedule such as business days and business hours (opening hours and closing times) for each season (summer, winter, etc.). The annual timer 5b is used, and various processes using seasons, business days, and business hours are executed by the control unit 5a.

  The communication unit 5 c enables communication with the centralized management device 8 via a connection line, and transmits and receives various information such as control information to and from the centralized management device 8.

  The central management device 8 includes a control unit 8a, a schedule management unit 8b, and a communication unit 8c. This centralized management device 8 exchanges various information such as control information with the control device 5 of each showcase 1 in the store through the communication unit 8c, and the control unit 8a concentrates the operating state of each showcase 1 and the like. Perform management.

  The schedule management unit 8b has a calendar, a timer, and the like, and manages schedule information. This schedule information is preset by an administrator or the like. As the schedule information, for example, an annual schedule for business days and business hours (opening hours, closing times, etc.) for each season (summer, winter, etc.) is set.

  When the above-described annual timer 5b is not provided in the control device 5, the control device 5 receives the schedule information of the schedule management unit 8b from the centralized management device 8 through the communication unit 5c, and based on the schedule information. Thus, the control unit 5a can execute various processes using seasons, business days, and business hours.

  Next, the operation process of the blower 4 performed by the control device 5 of the above-described showcase 1 will be described with reference to FIG. Normally, the showcase 1 is in an operating state in which the displayed goods are always cooled in order to refrigerate or freeze the displayed goods.

  As shown in FIG. 3, the control unit 5a determines whether today is a business day of the store based on the schedule information from the annual timer 5b or the schedule information transmitted from the centralized management device 8 (step S1). ).

  If it is determined that today is not a business day of the store (NO in step S1), the blower 4 is stopped (step S2), that is, if the blower 4 is operating, the operation is stopped and the blower is operated. When 4 is not driving | running, the stop state is maintained and a process is returned to step S1.

  On the other hand, if it is determined that today is a business day of the store (YES in step S1), the current time is in business hours based on the schedule information from the annual timer 5b or the schedule information transmitted from the centralized management device 8. Is determined (step S3).

  If it is determined that the current time is not during business hours (NO in step S3), the process proceeds to the above-described step S2, the blower 4 is stopped (step S2), that is, if the blower 4 is operating. Then, the operation is stopped, and when the blower 4 is not operating, the stopped state is maintained, and the process returns to step S1.

  Thus, when the current time is not during business hours, the blower 4 is stopped or maintained, and the rotation of the rotor blades 4a of the blower 4 is not permitted. As a result, even if the operator forgets to stop the operation of the blower 4 at the time of leaving the store, the blower 4 will not continue to operate outside the store's business day or business hours. Driving can be prevented.

  Next, when it is determined that the current time is during business hours (YES in step S3), it is determined whether or not the operation switch of the blower 4 is in an ON state (step S4).

  Here, the operation switch (input unit) of the blower 4 is electrically connected to the control device 5, and outputs an ON signal or an OFF signal of the operation switch to the control device 5. Based on the ON signal or OFF signal, the control unit 5a of the control device 5 determines whether or not the operation switch of the blower 4 is in the ON state.

  When it is determined that the operation switch of the blower 4 is not in the ON state (NO in step S4), the process proceeds to the above-described step S2, the blower 4 is stopped (step S2), that is, the blower 4 is operating. The operation is stopped, and when the blower 4 is not operating, the stopped state is maintained, and the process returns to step S1.

  On the other hand, if it is determined that the operation switch of the blower 4 is in the ON state (YES in step S4), the air conditioner (air conditioner) 9 is heated based on the operation signal of the air conditioner 9 in the store. It is determined whether or not the vehicle is driving (step S5).

  Here, the centralized management device 8 receives an operation signal indicating that the operation is a cooling operation or a heating operation from the air conditioner 9 by the communication unit 8 c and transmits the operation signal to the control device 5. The control device 5 receives the operation signal transmitted from the centralized management device 8 through the communication unit 5c, and determines whether the air conditioner 9 is in the heating operation by the control unit 5a based on the operation signal.

  When it is determined that the air conditioner 9 in the store is in the heating operation (YES in step S5), the blower 4 that blows air from the ceiling side to the floor side is operated (step S6), and the above-described step S1 is performed. Return processing.

  In the operation of the blower 4 that blows out air from the ceiling side to the floor side, the rotation direction of the rotary blades 4a of the blower 4 is the rotation direction in which the flow of air generated in the air duct 3 becomes the flow direction from the ceiling side to the floor side. The air above the case body 2, that is, the air on the ceiling side, which is higher in temperature than the air on the floor side, is blown out near the floor on the front surface of the case body 2.

  Therefore, when the air conditioner 9 is in the heating operation, warm air existing above the case body 2 is blown out near the floor on the front surface of the case body 2 by the heating operation. As a result, heat exchange occurs between the blown-out warm air and the cool air accumulated near the floor, and the cold air accumulated near the floor flows due to the blown-out warm air, so that the cold aisle generated in the showcase 1 is reduced. It can be surely suppressed. Moreover, heating efficiency can also be improved by the return of warm air.

  On the other hand, when it is determined that the air conditioner 9 in the store is not in the heating operation (NO in step S5), the air conditioner (air conditioner) 9 is determined based on the operation signal of the air conditioner 9 in the store. It is determined whether or not the cooling operation is performed (step S7).

  Here, as described above, the control device 5 receives the operation signal transmitted from the centralized management device 8 by the communication unit 5c, and according to the operation signal, whether the air conditioner 9 is in the cooling operation by the control unit 5a. Judge whether or not.

  When it is determined that the air conditioner 9 in the store is in the cooling operation (YES in step S7), the blower 4 that blows air from the floor side to the ceiling side is operated (step S8), and the above-described step S1 is performed. Return processing.

  In the operation of the blower 4 that blows out air from the floor side to the ceiling side, the rotation direction of the rotary blades 4a of the blower 4 is the rotation direction in which the flow of air generated in the air duct 3 becomes the flow direction from the floor side to the ceiling side. Then, cool air near the floor in front of the case body 2 is blown out above the case body 2.

  Therefore, when the air conditioner 9 is in the cooling operation, the cool air accumulated near the floor on the front surface of the case body 2 is sucked into the air duct 3 and then blown out above the case body 2. As a result, cold air accumulated near the floor on the front surface of the case body 2 is removed, so that cold aisle generated in the showcase 1 can be reliably suppressed. In addition, the cooling efficiency can be improved by the reflux of the cold air.

  On the other hand, when it is determined that the air conditioner 9 in the store is not in the cooling operation (NO in step S7), based on the schedule information by the annual timer 5b or the schedule information transmitted from the centralized management device 8, the annual timer 5b Is in the summer mode (summer period) or not (step S9).

  When it is determined that the annual timer 5b is in the summer mode (YES in step S9), the process proceeds to the above-described step S8, and the blower 4 that blows air from the floor side to the ceiling side is operated (step S8). The process returns to step S1 described above.

  On the other hand, when it is determined that the annual timer 5b is not in the summer mode (NO in step S9), the process proceeds to the above-described step S6, and the blower 4 that blows air from the ceiling side to the floor side is operated (step S6). Then, the process returns to step S1 described above.

  As described above, when the operation of the air conditioner 9 is neither the heating operation nor the cooling operation but the season is summer, the cool air near the floor on the front surface of the case body 2 is blown out above the case body 2. By cooling this cold air, it is possible to obtain a cooling effect while suppressing cold aisle.

  On the other hand, when the operation of the air conditioner 9 is neither heating operation nor cooling operation and the season is not summer, it is desired to avoid the cooling effect due to the above-mentioned cold air blowing. Therefore, in such a case, the air above the case body 2 is blown out near the floor on the front surface of the case body 2. This air recirculation can suppress cold aisle.

  As described above, according to the embodiment of the present invention, the rotation direction of the rotor blade 4a of the blower 4 is reversed between the cooling operation and the heating operation according to the operation of the air conditioner 9 in the store. To be changed. As a result, the flow direction of the air flowing in the air duct 3 is also switched to the opposite direction according to the operation of the air conditioner 9 and becomes two directions. Cold aisle can be reliably suppressed.

  In particular, when the operation of the air conditioner 9 is a cooling operation, the rotation direction of the rotor blades 4a of the blower 4 is set to a direction in which air flows from the floor side to the ceiling side, and the operation of the air conditioner 9 is a heating operation. In some cases, the rotation direction of the rotary blade 4a of the blower 4 is set to a direction in which air flows from the ceiling side to the floor side.

  Therefore, when the operation of the air conditioner 9 is a heating operation, such as when the season is winter, the air above the case body 2 is warmer than the air on the floor side, and the warm air flows in the air duct 3. The air is blown out to the vicinity of the floor on the front surface of the case body 2. On the other hand, when the operation of the air conditioner 9 is a cooling operation, such as when the season is summer, the air above the case body 2 is cooled to some extent. For this reason, the cold aisle suppressing effect is enhanced by removing the cool air itself near the floor in front of the case body 2 rather than supplying the cool air near the floor in front of the case body 2. Therefore, when the operation of the air conditioner 9 is the cooling operation, the cool air near the floor on the front surface of the case body 2 is blown out above the case body 2 through the air duct 3. By such a change in the air flow direction, cold aisle generated in the showcase 1 can be more reliably suppressed.

  Moreover, the rotation direction of the rotary blade 4a of the blower 4 is switched according to the period corresponding to the season around the store. Thereby, since the flow direction of the air generated in the air duct 3 can be changed corresponding to a season such as summer or winter, cold aisle can be more reliably suppressed. Further, the rotation of the blower 4 is permitted only during the business hours of the store according to the business hours of the store. Thereby, even when the operator forgets to stop the operation of the blower 4 when leaving the store, the blower 4 does not continue to operate outside the business hours, and the useless operation of the blower 4 can be suppressed. Because it becomes possible, energy saving can be realized.

  Further, when the temperature near the floor on the front surface of the case body 2 is measured by the first temperature sensor 6 and it is determined that the temperature is higher than the first threshold value, the rotary blade 4a of the blower 4 is stopped. The This prevents the temperature in the vicinity of the floor in front of the case body 2 from becoming unnecessarily high, so that the temperature in the vicinity of the floor can be maintained at a desired temperature, and the rotor blades 4a more than necessary. Since rotation is prevented, energy saving can be realized.

  When the temperature near the ceiling above the case body 2 is measured by the second temperature sensor 7 and the temperature is determined to be lower than the second threshold value, the rotation direction of the rotor blades 4a of the blower 4 is determined. The air flows from the floor side to the ceiling side. As a result, air is blown out above the case body 2, and condensation of the ceiling above the case body 2 and generation of mold can be prevented by the flow of air. In addition, the dew condensation may occur depending on the condition that the ceiling in the store is cooled by the radiant heat effect of the showcase 1, and it is desired to prevent this dew condensation.

  An infrared sensor is used as the first temperature sensor 6 or the second temperature sensor 7. Thereby, since the infrared sensor can operate at room temperature and is simple and inexpensive, it is possible to suppress the complexity and cost increase of the apparatus configuration. In addition, since it becomes possible to measure the temperature of the distant object, the degree of freedom of the installation position of the temperature sensor can be improved. For example, the second temperature sensor 7 may be provided not on the ceiling surface above the case body 2 but on the upper surface of the case body 2, and the degree of freedom of the installation position is improved.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, some components may be deleted from all the components shown in the above-described embodiment. Furthermore, you may combine the component covering different embodiment suitably.

  Here, for example, when the back surface of the case body 2 is a gondola, as shown in FIG. 1, the back surface duct 3a is provided on the back surface of the case body 2, but as shown in FIG. 4 or FIG. When the back of the case is a wall or other case, a part of the back duct 3a is configured by another structure (for example, a wall surface M1, a case back M2, etc.) depending on the installation location and installation situation of the showcase 1. You may make it do. Similarly, a part of the bottom duct 3b may be configured by another structure (for example, a floor surface) depending on the installation location and installation situation of the showcase 1.

  As shown in FIG. 4, when the back surface of the case body 2 is a wall, that is, when the showcase 1 is installed in front of the wall surface M1 in the store, a part (rear surface) of the back duct 3a is connected to the wall surface M1. You may make it comprise by. In this case, the side surface of the back duct 3a is formed of a plate material (for example, a plate material that serves as a duct end) that closes the gap from the side surface of the case body 2 to the wall surface M1. Similarly, the upper surface of the back duct 3a is formed of a plate material that closes the gap from the upper surface of the case body 2 to the wall surface M1 while avoiding the blower 4. Accordingly, the back duct 3a is constituted by the wall surface M1 and a plurality of plate members in addition to the back surface of the case body 2.

  As shown in FIG. 5, when the back surface of the case body 2 is a case, that is, when two showcases 1 are installed in a store with the case back surfaces M2 facing each other, the back duct 3a You may make it comprise a part by each case back surface M2 of the two showcases 1. FIG. In this case, the side surface of the rear duct 3a is formed of a plate material (for example, a plate material that serves as a duct end) that closes the gap between the side surfaces of the two showcases 1. Similarly, the upper surface of the rear duct 3a is formed of a plate material that closes the gap between the upper surfaces of the two showcases 1 while avoiding the blower 4. Accordingly, the back duct 3a is constituted by each case back face M2 and a plurality of plates, and is a duct common to the two showcases 1.

DESCRIPTION OF SYMBOLS 1 Showcase 2 Case main body 2a Circulation fan 2b Cold air duct 2c Cooler 3 Air duct 3a Back surface duct 3b Bottom surface duct 4 Blower 4a Rotor blade 5 Controller 5a Control part 5b Annual timer 5c Communication part 6 1st temperature sensor 7 2nd Temperature sensor 8 Central management device 8a Control unit 8b Schedule management unit 8c Communication unit 9 Air conditioner H1 Intake port H2 Outlet M1 Wall surface M2 Back of case

Claims (2)

Airflow is generated by the rotor blades in the air duct that extends from the upper end of the back of the showcase that can open and cool the product through the back and bottom of the showcase to the lower end of the front of the showcase. A driving device for driving a blower,
According to the operation of the air conditioner that adjusts the temperature in the store, the rotation direction of the rotor blades is reversed between the case where the operation of the air conditioner is a cooling operation and the case of the heating operation, Permit the rotation of the rotor blade only during the business hours of the store according to the time ,
A first temperature sensor for measuring the temperature near the floor in front of the showcase;
It is determined whether the temperature measured by the first temperature sensor is higher than a first threshold value, and when it is determined that the temperature is higher than the first threshold value, the rotor blade is stopped. A blower operating device characterized by that. Airflow is generated by the rotor blades in the air duct that extends from the upper end of the back of the showcase that can open and cool the product through the back and bottom of the showcase to the lower end of the front of the showcase. An operation method for operating a blower,
According to the operation of the air conditioner that adjusts the temperature in the store, the rotation direction of the rotor blades is reversed between the case where the operation of the air conditioner is a cooling operation and the case of the heating operation, Permit the rotation of the rotor blade only during the business hours of the store according to the time,
Measuring the temperature near the floor in front of the showcase, determining whether the measured temperature is higher than a first threshold, and determining that the temperature is higher than the first threshold; how the operation of the wind machine feed you characterized by stopping the rotor blades.

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