JP2017181004A - Showcase and operation method for showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a showcase capable of suppressing increase of a cooling load due to disturbance.SOLUTION: A showcase 100 includes: a case 101 having on its front face an opening for taking out a merchandise; a merchandise storage box 102 provided in the case 101, and including a shelf 103 configured to display merchandises; a first air feeder 111 configured to feed air for a first air curtain flowing outside the merchandise storage box 102; a second air feeder 112 configured to feed air for a second air curtain flowing outside the first air curtain; and a controller 104 configured to reduce output of the first air feeder 111 in a second period in which collapse of the second air curtain due to disturbance is larger than that in the first period.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a showcase that uses an air curtain.

  Conventionally, a technique related to a showcase using an air curtain has been proposed. For example, Patent Document 1 proposes energy saving operation related to an open showcase having a two-layer air curtain cooling structure.

JP 2010-203740 A

  However, the air curtain may collapse due to disturbance. And when an air curtain collapse | crumbles, a cooling load may increase.

  In view of the above circumstances, the exemplary embodiment provides a showcase or the like that can suppress an increase in cooling load due to disturbance.

  A showcase according to an aspect of the present disclosure includes a case having an opening for taking out a product on a front surface, a product storage provided in the case and including a shelf for displaying the product, and flowing outside the product storage. A first insufflator for supplying air for the first air curtain, a second insufflator for supplying air for the second air curtain flowing outside the first air curtain, and a disturbance A controller that reduces the output of the first air blower at a second time when the collapse of the second air curtain is greater than the first time.

  Note that these comprehensive or specific aspects may be realized by a system, apparatus, method, integrated circuit, computer program, or non-transitory recording medium such as a computer-readable CD-ROM. The present invention may be realized by any combination of an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

  The showcase or the like according to one embodiment of the present disclosure suppresses an increase in the cooling load due to disturbance.

FIG. 1 is a configuration diagram showing a double air curtain type showcase in a reference example. FIG. 2 is a configuration diagram showing a simple double air curtain type showcase in a reference example. FIG. 3 is a graph showing the electric energy of the cooler in the reference example. FIG. 4 is a block diagram illustrating a configuration of the showcase in the embodiment. FIG. 5 is a flowchart showing the operation of the showcase in the embodiment. FIG. 6 is a flowchart illustrating an example of the operation of the controller in the embodiment. FIG. 7 is a configuration diagram illustrating a first specific example of the showcase according to the embodiment. FIG. 8 is a configuration diagram illustrating a second specific example of the showcase in the embodiment.

(Knowledge that became the basis of this disclosure)
The present inventor has found problems regarding a showcase using an air curtain and the like. This will be specifically described below.

  FIG. 1 is a configuration diagram showing a double air curtain type showcase in a reference example. A showcase 800 shown in FIG. 1 is an open showcase installed in a store or the like, and is a showcase using a double air curtain.

  The showcase 800 includes a case 801, a product storage box 802, a shelf 803, a cooler 805, a slit 806, an inner layer circulation fan 811, an outer layer circulation fan 812, an inner layer air curtain suction port 821, an outer layer air curtain suction port 822, and an inner layer circulation duct. 831, an outer layer circulation duct 832, an inner layer air curtain outlet 841, an outer layer air curtain outlet 842, and the like.

  Case 801 has an opening surface. Air for the inner layer air curtain and air for the outer layer air curtain flow along the opening surface of the case 801. Thereby, a double air curtain is generated along the opening surface of the case 801. The air for the inner layer air curtain is sucked in by the inner layer air curtain suction port 821, and the air for the outer layer air curtain is sucked by the outer layer air curtain suction port 822.

  The air for the inner layer air curtain and the air for the outer layer air curtain are cooled by the cooler 805. In a normal double air curtain that is not a simple double air curtain described later, both the air for the inner layer air curtain and the air for the outer layer air curtain are cooled. Thereafter, again, the air for the inner layer air curtain is blown out by the inner layer air curtain outlet 841, and the air for the outer layer air curtain is blown out by the outer layer air curtain outlet 842.

  In addition, a slit 806 is provided on the back plate of the product storage 802. The cooled air is sent from the inner layer circulation duct 831 through the slit 806 to the inside of the commodity storage 802. Thereby, the inside of the product storage 802 is cooled.

  However, due to the turbulence of the double air curtain, the air outside the double air curtain may be mixed with the air of the double air curtain and sucked into the inner layer air curtain inlet 821 or the outer layer air curtain inlet 822. And thereby, the load of the cooler 805 may increase.

  FIG. 2 is a configuration diagram showing a simple double air curtain type showcase in a reference example. A showcase 900 shown in FIG. 2 is an open showcase installed in a store or the like, and is a showcase using a simple double air curtain.

  The showcase 900 includes a case 901, a product storage 902, a shelf 903, a cooler 905, a slit 906, a cold air circulation fan 911, a non-cold air circulation fan 912, an inner layer air curtain suction port 921, a cold air circulation duct 931, and an inner layer air curtain blower. An outlet 941 and an outer air curtain outlet 942 are provided.

  Case 901 has an opening surface. Air for the inner layer air curtain and air for the outer layer air curtain flow along the opening surface of the case 901. As a result, a double air curtain is generated along the opening surface of the case 901. Then, the air for the inner layer air curtain is sucked in by the inner layer air curtain suction port 921. The air for the inner layer air curtain is cooled by the cooler 905. Thereafter, the air for the inner layer air curtain is blown out again by the inner layer air curtain outlet 941.

  A slit 906 is provided on the back plate of the product storage 902. The cooled air is sent from the cold air circulation duct 931 through the slit 906 to the inside of the commodity storage 902. Thereby, the inside of the product storage 902 is cooled.

  On the other hand, the air for the outer layer air curtain is sucked in from the periphery of the top plate portion by the non-cool air circulation fan 912 installed in the top plate portion of the case 901 and blown out from the outer layer air curtain outlet 942.

  A showcase 800 that uses a normal double air curtain includes an inner layer circulation duct 831 and an outer layer circulation duct 832. On the other hand, the showcase 900 using the simple double air curtain includes a cold air circulation duct 931 corresponding to the inner layer circulation duct 831. However, the showcase 900 corresponds to the outer layer circulation duct 832 in order to suck in air around the top plate portion. There is no duct. Thereby, cost is reduced.

  However, due to the disturbance of the double air curtain, the air outside the double air curtain may be mixed with the air of the double air curtain and sucked into the inner layer air curtain suction port 921. And thereby, the load of the cooler 905 may increase.

  In addition, the showcase 900 using the simple double air curtain does not cool the air for the outer layer air curtain. And the temperature of the air around a top-plate part may be high. Therefore, the temperature of the air in the outer layer air curtain in the showcase 900 using the simple double air curtain may be higher than the temperature of the air in the outer layer air curtain in the showcase 800 using the normal double air curtain. .

  Then, the air for the outer layer air curtain having a high temperature may enter the inside of the product storage 902 due to the disturbance of the double air curtain. In addition, the air for the outer layer air curtain having a high temperature may be mixed with the air of the inner layer air curtain and may be sucked into the inner layer air curtain suction port 921. And thereby, the load of the cooler 905 may increase.

  FIG. 3 is a graph showing the electric energy of the cooler 905 of the showcase 900 shown in FIG. Specifically, the measurement result of the power consumption of the cooler 905 when the outer layer air curtain is ON and the measurement result of the power consumption of the cooler 905 when the outer layer air curtain is OFF are measured every hour. It is shown.

  The outer layer air curtain suppresses the air outside the outer layer air curtain from entering the product storage 902. Therefore, it is assumed that the power amount of the cooler 905 when the outer layer air curtain is ON is originally smaller than the power amount of the cooler 905 when the outer layer air curtain is OFF. However, in the graph of FIG. 3, at 13:00, the amount of power in the ON state is greater than the amount of power in the OFF state.

  As one of the factors, the increase in the number of customers at the store disturbs the double air curtain in the ON state, and the air of the outer air curtain and the air of the sales floor are sucked into the inner air curtain inlet 921 and cooled. It is assumed that the load on the container 905 is increased. In the OFF state, the amount of these high-temperature air sucked into the inner-layer air curtain suction port 921 is relatively small, and the air in the inner-layer air curtain and the air in the product storage 902 are appropriately cooled and cooled. It is assumed that the load on the container 905 is small.

  In FIG. 3, the electric energy of the cooler 905 of the showcase 900 using the simple double air curtain is shown, but the electric energy of the cooler 805 of the showcase 800 using the normal double air curtain is also the same. It is assumed that That is, even in a showcase 800 that uses a normal double air curtain, the increase in the number of customers at the store disturbs the double air curtain, and the air outside the double air curtain becomes the air of the double air curtain. It is assumed that the load on the cooler 805 will increase.

  Accordingly, a showcase according to an aspect of the present disclosure includes a case having an opening for taking out a product on a front surface, a product storage provided in the case and including a shelf for displaying the product, and an outer side of the product storage A first air blower that feeds air for the first air curtain flowing through the second air blower that feeds air for the second air curtain flowing outside the first air curtain; A controller that reduces the output of the first air feeder at a second time when the collapse of the second air curtain due to a disturbance is greater than the first time.

  As a result, the showcase can reduce the wind speed of the first air curtain at the time when the air of the second air curtain including the air outside the case enters the inside of the case. Air including outside air can be cooled. Therefore, the showcase can suppress the cooling load from increasing due to disturbance. Further, when the output of the first insufflator is reduced, the power consumption of the first insufflator is reduced, so that the energy efficiency of the showcase is improved.

  For example, the controller may operate the second insufflator at the second time.

  Thereby, the showcase can continue the operation of the double air curtain, and the double air curtain can prevent the air outside the case from directly entering the inside of the case.

  Further, for example, the controller may reduce the output of the second insufflator at the second time.

  Thereby, the showcase can reduce the amount of the air of the second air curtain including the air outside the case entering the inside of the case.

  Further, for example, the controller may stop the second insufflator at the second time.

  Thereby, the showcase can suppress the air of the second air curtain including the air outside the case from entering the inside of the case.

  In addition, for example, the showcase further includes a suction port for sucking air for the first air curtain, and the second time is a temperature of air flowing into the suction port more than the first time. It may be a high time.

  Thereby, the showcase can suppress an increase in the cooling load when the temperature is high.

  In addition, for example, the showcase further includes a suction port for sucking in air for the first air curtain, and the second time is enthalpy of air flowing into the suction port more than the first time. It may be a high time.

  Thereby, the showcase can suppress that a cooling load increases at the time when enthalpy is high.

  In addition, for example, the second time may be a time when the frequency with which the product is taken out from the product storage is higher than the first time.

  Thereby, the showcase can suppress that a cooling load increases at the time when the frequency with which goods are taken out is high.

  In addition, for example, the second time may be a time when there are more visitors to the store where the showcase is installed than in the first time.

  Thereby, the showcase can suppress that a cooling load increases when there are many shoppers.

  In addition, for example, a method for operating a showcase according to an aspect of the present disclosure includes a step of supplying air for a first air curtain using a first air supply device, and a step of supplying the first air using a second air supply device. A step of supplying air for the second air curtain flowing outside the curtain, and a second time when the collapse of the second air curtain due to the disturbance is larger than the first time. Reducing the output.

  Thereby, at the time when the air of the second air curtain including the air outside the case enters the inside of the case, the wind speed of the first air curtain is lowered, and the air including the external air is allowed for a sufficient time. Is cooled. Therefore, the cooling load is suppressed from increasing due to disturbance.

  Note that these comprehensive or specific aspects may be realized by a system, an apparatus, a method, an integrated circuit, a computer program, or a non-transitory recording medium such as a computer-readable CD-ROM. The present invention may be realized by any combination of a method, an integrated circuit, a computer program, or a recording medium.

  Hereinafter, embodiments will be specifically described with reference to the drawings. It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present disclosure. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  In terms of expression, the ordinal numbers such as first, second, and third may be added to, replaced, or removed from the components.

(Embodiment)
FIG. 4 is a block diagram showing the configuration of the showcase in the present embodiment. The showcase 100 shown in FIG. 4 includes a case 101, a product storage case 102, a shelf 103, a controller 104, a first insufflator 111, and a second insufflator 112. The showcase 100 may further include a suction port 121 as an optional component.

  The case 101 is an example of the case of the present disclosure, and has an opening for taking out a product on the front surface. For example, the case 101 is a housing of the showcase 100. The front surface is a front surface of the case 101 and is a front surface of the showcase 100.

  The product storage 102 is an example of a product storage according to the present disclosure, and is provided in the case 101. In addition, the product storage case 102 includes a shelf 103. The shelf 103 is an example of a shelf of the present disclosure, and is a shelf for displaying commodities.

  The first insufflator 111 is an example of the first insufflator of the present disclosure, and supplies the air for the first air curtain. For example, the first insufflator 111 is a fan.

  Here, the air for the first air curtain flows outside the product storage case 102. For example, the air for the first air curtain flows so as to cover the opening of the case 101. The first air curtain corresponds to the inner layer air curtain.

  The 2nd air supply device 112 is an example of the 2nd air supply device of this indication, Comprising: The air for 2nd air curtains is supplied. For example, the second insufflator 112 is a fan.

  Here, the air for the second air curtain flows outside the first air curtain. That is, the air for the second air curtain flows outside the commodity storage 102 and the first air curtain. For example, the air for the second air curtain flows outside the first air curtain with respect to the commodity storage 102 so as to cover the opening of the case 101. The second air curtain corresponds to the outer layer air curtain.

  The suction port 121 is an example of a suction port of the present disclosure, and sucks air for the first air curtain. Specifically, the suction port 121 sucks in air for the first air curtain that has flowed outside the commodity storage 102.

  The controller 104 is an example of a controller according to the present disclosure, and reduces the output of the first insufflator 111 at a second time when the collapse of the second air curtain due to disturbance is larger than the first time.

  For example, the first period is a period when the collapse of the second air curtain due to the disturbance is less than the reference, and the second period is a period when the collapse of the second air curtain due to the disturbance is larger than the reference. Also good.

  Further, the second time when the collapse of the second air curtain due to disturbance is larger than the first time may be a time when the temperature of the air flowing into the suction port 121 is higher than the first time. For example, the first time is a time when the temperature of the air flowing into the suction port 121 is equal to or lower than the threshold, and the second time is a time when the temperature of the air flowing into the suction port 121 is higher than the threshold. Also good.

  In particular, the second time is a time when the temperature of the air flowing into the suction port 121 is higher than that of the first time when the outputs of the first air supply 111 and the second air supply 112 are constant. There may be. For example, the first time is a time when these outputs are constant, and the temperature of the air flowing into the suction port 121 is a threshold value or less, and the second time is when these outputs are constant, The time when the temperature of the air flowing into the suction port 121 is higher than the threshold may be used.

  Further, the second time when the collapse of the second air curtain due to disturbance is larger than the first time may be a time when the enthalpy of the air flowing into the suction port 121 is higher than the first time. For example, the first time is a time when the enthalpy of air flowing into the suction port 121 is less than or equal to the threshold value, and the second time is a time when the enthalpy of air flowing into the suction port 121 is higher than the threshold value. Also good.

  In particular, the second time is a time when the enthalpy of the air flowing into the suction port 121 is higher than the first time in the state where the outputs of the first air supply 111 and the second air supply 112 are constant. There may be. For example, the first time is a time when these outputs are constant, and the enthalpy of the air flowing into the suction port 121 is a threshold value or less, and the second time is when these outputs are constant, The time when the enthalpy of the air flowing into the suction port 121 is higher than the threshold may be used.

  Further, the second time when the collapse of the second air curtain due to disturbance is larger than the first time may be a time when the frequency of taking out the product from the product storage case 102 is higher than the first time. For example, the first time is a time when the frequency with which products are taken out from the product storage 102 is below a threshold, and the second time is the time when the frequency with which products are taken out from the product storage 102 is higher than the threshold. There may be.

  The second time when the collapse of the second air curtain due to disturbance is larger than the first time is a time when there are more visitors to the store where the showcase 100 is installed than the first time. Also good. For example, the first time is a time when a visitor to the store where the showcase 100 is installed is below a threshold, and the second time is that a visitor to the store where the showcase 100 is installed is It may be a period that is greater than the threshold.

  Further, the first time period and the second time period may be a first time zone and a second time zone, respectively. In other words, the second time period may be a time period in which the collapse of the second air curtain due to a disturbance is greater than the first time period corresponding to the first time period.

  Further, the controller 104 controls the first insufflator 111. The controller 104 may be a computer, and may include an arithmetic processor and a storage device that stores a control program. The arithmetic processor of the controller 104 may be an MPU or a CPU. The storage device of the controller 104 may be a volatile memory or a nonvolatile memory. The controller 104 may be configured by a single controller that performs centralized control, or may be configured by a plurality of controllers that perform distributed control in cooperation with each other.

  FIG. 5 is a flowchart showing the operation of the showcase 100 shown in FIG. For example, the showcase 100 shown in FIG. 4 performs the operation shown in FIG.

  Specifically, the first insufflator 111 supplies the air for the first air curtain (S101). The second insufflator 112 supplies the air for the second air curtain (S102). Then, the controller 104 reduces the output of the first air supply device 111 at the second time when the collapse of the second air curtain is larger than the first time (S103). That is, the controller 104 reduces the wind speed of the first air curtain at the second time.

  As a result, the showcase 100 can reduce the wind speed of the first air curtain at a time when the air of the second air curtain including the air outside the case 101 enters the inside of the case 101, and a sufficient time is allowed. As a result, the air including the outside air can be cooled. Therefore, the showcase 100 can suppress the cooling load from increasing due to disturbance.

  The controller 104 may stop the second insufflator 112 at the second time. That is, the controller 104 may turn off the second air curtain at the second time. Thereby, the showcase 100 can suppress the air of the second air curtain including the air outside the case 101 from entering the inside of the case 101.

  Further, the controller 104 may operate the second insufflator 112 at the second time. That is, the controller 104 may turn on both the first air curtain and the second air curtain at the second time. Thereby, the showcase 100 can continue the operation of the double air curtain, and the double air curtain can prevent the air outside the case 101 from directly entering the inside of the case 101.

  In addition, the controller 104 may maintain the output of the second insufflator 112 without decreasing at the second time. That is, the controller 104 may maintain the second air curtain without reducing the wind speed at the second time. As a result, the showcase 100 has a large influence on the temperature of the product storage 102 while mainly suppressing the air outside the case 101 directly entering the inside of the case 101 with the second air curtain. The air for one air curtain can be efficiently cooled.

  In addition, the controller 104 may reduce the output of the second insufflator 112 at the second time. That is, the controller 104 may reduce the wind speed of the second air curtain at the second time. Thereby, the showcase 100 can reduce the amount of the air in the second air curtain including the air outside the case 101 entering the inside of the case 101.

  In addition, the controller 104 maintains the difference or ratio between the output of the first insufflator 111 and the output of the second insufflator 112 at the second time, and the output of the first insufflator 111. The output of the second insufflator 112 may be reduced. That is, the controller 104 maintains the difference or ratio between the wind speed of the first air curtain and the wind speed of the second air curtain in the second time period, The air speed of the air curtain may be reduced.

  Thereby, the showcase 100 can continue the operation of the double air curtain more appropriately, and the double air curtain more appropriately prevents the air outside the case 101 from directly entering the inside of the case 101. Can be suppressed.

  In addition, the controller 104 may decrease the output of the second insufflator 112 at a second rate at a rate that is greater than the rate of decrease in the output of the first insufflator 111. That is, the controller 104 may decrease the wind speed of the second air curtain at the second time with a reduction rate larger than the reduction rate of the wind speed of the first air curtain. As a result, the showcase 100 can more appropriately reduce the amount of air in the second air curtain including air outside the case 101 entering the inside of the case 101.

  FIG. 6 is a flowchart showing an example of the operation of the controller 104 in the showcase 100 shown in FIG. For example, the controller 104 in the showcase 100 shown in FIG. 4 performs the operation shown in FIG.

  First, the controller 104 detects the suction temperature, which is the temperature of the air flowing into the suction port 121 (S201). The controller 104 may detect the suction temperature via a sensor or the like. Next, the controller 104 determines whether or not the suction temperature is equal to or higher than a threshold value (S202).

  Then, when the suction temperature is equal to or higher than the threshold (Yes in S202), the controller 104 reduces the wind speed of the first air curtain from the normal wind speed (S203). That is, at this time, the controller 104 decreases the output of the first air supply device 111 that supplies air for the first air curtain.

  On the other hand, when the suction temperature is not equal to or higher than the threshold value (No in S202), that is, when the suction temperature is lower than the threshold value, the controller 104 adjusts the wind speed of the first air curtain to the normal wind speed (S204). That is, at this time, the controller 104 operates the first insufflator 111 that supplies the air for the first air curtain with a normal output. The normal wind speed is a predetermined standard wind speed, and the normal output is a predetermined standard output.

  The controller 104 reduces the output of the first air supply device 111 at the second time when the temperature of the air flowing into the suction port 121 is higher than that at the first time by the above operation. In this second period, it is assumed that the collapse of the second air curtain due to disturbance is greater than in the first period. Therefore, the controller 104 reduces the output of the first air supply device 111 at the second time when the collapse of the second air curtain due to the disturbance is larger than the first time by the above operation.

  In the example of FIG. 6, the second time is a time when the temperature of the air flowing into the suction port 121 is high. However, as described above, the second time may be a time when the enthalpy of the air flowing into the suction port 121 is high, a time when the product is taken out from the product storage case 102, or the showcase 100 may be It may be a time when there are many visitors to the installed store.

  FIG. 7 is a configuration diagram showing a first specific example of the showcase 100 shown in FIG. A showcase 200 shown in FIG. 7 is an open showcase installed in a store or the like, and is a showcase using a normal double air curtain instead of a simple double air curtain. That is, FIG. 7 shows an example in which the showcase 100 shown in FIG. 4 is applied to a showcase 200 using a normal double air curtain.

  The showcase 200 includes a case 201, a product storage box 202, a shelf 203, a controller 204, a cooler 205, a slit 206, an inner layer circulation fan 211, an outer layer circulation fan 212, an inner layer air curtain suction port 221, and an outer layer air curtain suction port 222. , Inner layer circulation duct 231, outer layer circulation duct 232, inner layer air curtain outlet 241, outer layer air curtain outlet 242, inlet sensor 251, outlet sensor 261, and the like.

  The showcase 200, case 201, commodity storage 202, shelf 203, controller 204, inner layer circulation fan 211, outer layer circulation fan 212, and inner layer air curtain inlet 221 of FIG. , A case 101, a product storage case 102, a shelf 103, a controller 104, a first insufflator 111, a second insufflator 112, and a suction port 121.

  The case 201 has an opening for taking out a product on the front surface. This front surface is the front surface of the case 201 and the front surface of the showcase 200. For example, the case 201 is a housing of the showcase 200.

  The product storage 202 is provided in the case 201. In addition, the product storage 202 includes a shelf 203. The shelf 203 is a shelf for displaying commodities. Specifically, the product is placed on the shelf 203.

  The inner layer circulation fan 211 circulates the air for the inner layer air curtain by supplying air for the inner layer air curtain. Here, the inner layer air curtain corresponds to the first air curtain. When the air for the inner layer air curtain flows outside the commodity storage 202, the inner layer air curtain is generated.

  For example, the air for the inner layer air curtain is blown out from the inner layer air curtain outlet 241, flows so as to cover the opening of the case 201, and is sucked into the inner layer air curtain suction port 221. Then, the air for the inner layer air curtain is sent from the inner layer air curtain inlet 221 to the inner layer air curtain outlet 241 through the inner layer circulation duct 231.

  The inner layer circulation fan 211 circulates the air for the inner layer air curtain as described above by supplying the air for the inner layer air curtain in the inner layer circulation duct 231.

  The outer layer circulation fan 212 circulates the air for the outer layer air curtain by supplying air for the outer layer air curtain. Here, the outer layer air curtain corresponds to the second air curtain. The outer layer air curtain is generated by the air for the outer layer air curtain flowing outside the inner layer air curtain.

  For example, the air for the outer layer air curtain is blown out from the outer layer air curtain outlet 242 and flows outside the inner layer air curtain with respect to the product storage 202 so as to cover the opening of the case 201, and the outer layer air curtain suction port It is sucked into 222. Then, the air for the outer layer air curtain is sent from the outer layer air curtain suction port 222 to the outer layer air curtain outlet 242 through the outer layer circulation duct 232.

  The outer layer circulation fan 212 circulates the air for the outer layer air curtain as described above by supplying the air for the outer layer air curtain in the outer layer circulation duct 232.

  The inner layer circulation fan 211 and the outer layer circulation fan 212 may send air for the inner layer air curtain and air for the outer layer air curtain so that the wind speed of the inner layer air curtain and the wind speed of the outer layer air curtain are different. For example, the inner layer circulation fan 211 and the outer layer circulation fan 212 send the air for the inner layer air curtain and the air for the outer layer air curtain so that the wind speed of the inner layer air curtain is higher than the wind speed of the outer layer air curtain.

  Thereby, the showcase 200 can appropriately suppress air from entering the inside of the product storage 202 from the outside.

  The inner layer air curtain outlet 241 blows out air for the inner layer air curtain. The outer air curtain outlet 242 blows out air for the outer air curtain. Thereby, the air for the inner layer air curtain and the air for the outer layer air curtain flow so as to cover the opening of the case 201, and a double air curtain is generated.

  The inner layer air curtain suction port 221 sucks air for the inner layer air curtain. The outer layer air curtain suction port 222 sucks air for the outer layer air curtain. The inner layer circulation duct 231 guides the air for the inner layer air curtain from the inner layer air curtain inlet 221 to the inner layer air curtain outlet 241. The outer layer circulation duct 232 guides the air for the outer layer air curtain from the outer layer air curtain suction port 222 to the outer layer air curtain outlet 242.

  The cooler 205 cools both the air for the inner layer air curtain and the air for the outer layer air curtain. Specifically, the cooler 205 cools the air for the inner layer air curtain in the inner layer circulation duct 231, and cools the air for the outer layer air curtain in the outer layer circulation duct 232. For example, the cooler 205 is a refrigerator provided with a compressor or the like, and cools air by the principle of a heat pump.

  The slit 206 is provided on the back plate of the product storage box 202. The air cooled by the cooler 205 is sent from the inner layer circulation duct 231 to the inside of the product storage box 202 through the slit 206. Thereby, the inside of the product storage 202 is cooled.

  The suction port sensor 251 is a sensor that detects a suction temperature that is the temperature of the air flowing into the inner layer air curtain suction port 221. For example, the suction port sensor 251 is a thermometer that is installed at or near the inner layer air curtain suction port 221 and detects the temperature of air at or near the inner layer air curtain suction port 221 as the suction temperature.

  In FIG. 7, the suction port sensor 251 is installed in the inner layer circulation duct 231 at a position before the air for the inner layer air curtain passes through the inner layer circulation fan 211, but the air for the inner layer air curtain is circulated in the inner layer. You may install in the position after passing the fan 211. FIG. The suction port sensor 251 may be installed at an arbitrary position in the inner layer circulation duct 231 before being cooled by the cooler 205.

  Further, the suction port sensor 251 may further detect suction humidity that is the humidity of air flowing into the inner layer air curtain suction port 221. That is, the suction port sensor 251 may be a temperature / humidity meter, and may detect the humidity of air at or near the inner layer air curtain suction port 221 as the suction humidity.

  The outlet sensor 261 is a sensor that detects an outlet temperature that is the temperature of the air that flows out from the inner layer air curtain outlet 241. For example, the outlet sensor 261 is a thermometer that is installed at or near the inner layer air curtain outlet 241 and detects the temperature of air at or near the inner layer air curtain outlet 241 as the outlet temperature. The air outlet sensor 261 may be installed at an arbitrary position in the inner layer circulation duct 231 after the air for the inner layer air curtain is cooled by the cooler 205.

  Further, the air outlet sensor 261 may further detect the air outlet humidity which is the humidity of the air flowing out from the inner layer air curtain air outlet 241. That is, the air outlet sensor 261 may be a temperature / humidity meter, and may detect the temperature of air at or near the inner layer air curtain air outlet 241 as the air outlet humidity.

  The controller 204 reduces the output of the inner layer circulation fan 211 at the second time when the collapse of the outer air curtain due to the disturbance is larger than the first time. For example, the controller 204 is connected to the inner layer circulation fan 211, the outer layer circulation fan 212, the suction port sensor 251, the blowout port sensor 261, and the like so as to be communicable in a wired or wireless manner.

  Then, the controller 204 controls the operations of the inner layer circulation fan 211 and the outer layer circulation fan 212 by communication to operate the inner layer circulation fan 211 and the outer layer circulation fan 212. Then, the controller 204 controls the operations of the inner layer circulation fan 211 and the outer layer circulation fan 212 through communication, thereby reducing the output of the inner layer circulation fan 211 at the second time when the collapse of the outer layer air curtain is large.

  The second time may be a time when the temperature of the air flowing into the inner layer air curtain suction port 221 is higher than the first time. For example, the controller 204 may periodically detect the suction temperature by periodically receiving the suction temperature from the suction port sensor 251. Then, the controller 204 may decrease the output of the inner layer circulation fan 211 at the second time when the suction temperature is higher than the first time.

  Further, the temperature of the air flowing into the inner layer air curtain inlet 221 may be a temperature relative to the temperature of the air flowing out from the inner layer air curtain outlet 241. For example, the controller 204 may periodically detect the suction temperature and the blowout temperature by periodically receiving the suction temperature and the blowout temperature from the suction port sensor 251 and the blowout port sensor 261. Then, the controller 204 may reduce the output of the inner layer circulation fan 211 at a second time when the suction temperature obtained by subtracting the blowing temperature is higher than the first time.

  In particular, during the second period, the temperature of the air flowing into the inner layer air curtain inlet 221 when the output of the inner layer circulation fan 211, the output of the outer layer circulation fan 212, and the output of the cooler 205 are constant. May be a period higher than the first period. That is, the controller 204 may reduce the output of the inner layer circulation fan 211 at a second time when the temperature of the air flowing into the inner layer air curtain suction port 221 is high when these outputs are constant.

  The second time may be a time when the enthalpy of the air flowing into the inner layer air curtain inlet 221 is higher than the first time.

  For example, the controller 204 may periodically detect the suction temperature and the suction humidity by periodically receiving the suction temperature and the suction humidity from the suction port sensor 251. And the controller 204 may derive | lead-out the enthalpy of the air which flows in into the inner-layer air curtain inlet 221 as a suction enthalpy based on suction temperature and suction humidity. Then, the controller 204 may reduce the output of the inner layer circulation fan 211 at a second time when the suction enthalpy is higher than the first time.

  The enthalpy of air flowing into the inner layer air curtain inlet 221 may be a relative enthalpy with respect to the enthalpy of air flowing out from the inner layer air curtain outlet 241.

  For example, the controller 204 periodically receives the suction temperature, the suction humidity, the blowout temperature, and the blowout humidity from the suction port sensor 251 and the blowout port sensor 261, thereby periodically changing the suction temperature, the suction humidity, the blowout temperature, and the blowout humidity. May be detected automatically.

  And the controller 204 may derive | lead-out the enthalpy of the air which flows in into the inner-layer air curtain inlet 221 as a suction enthalpy based on suction temperature and suction humidity. And the controller 204 may derive | lead-out the enthalpy of the air which flows out out of the inner-layer air curtain outlet 241 as a blowing enthalpy based on blowing temperature and blowing humidity. Then, the controller 204 may reduce the output of the inner layer circulation fan 211 at a second time when the suction enthalpy after subtracting the blowing enthalpy is higher than the first time.

  In particular, during the second period, the enthalpy of the air flowing into the inner layer air curtain inlet 221 when the output of the inner layer circulation fan 211, the output of the outer layer circulation fan 212, and the output of the cooler 205 are constant. May be a period higher than the first period. That is, the controller 204 may reduce the output of the inner layer circulation fan 211 at a second time when the enthalpy of the air flowing into the inner layer air curtain suction port 221 is high when these outputs are constant.

  Further, the second time may be a time when the frequency with which the product is taken out from the product storage 202 is higher than the first time. For example, the controller 204 may acquire the frequency at which the product is taken out from the product storage 202 by receiving the frequency at which the product is purchased from a cash register of the store. Then, the controller 204 may reduce the output of the inner layer circulation fan 211 at a second time when the frequency of taking out the products from the product storage 202 is higher than the first time.

  Further, the second time may be a time determined in advance as a time when the frequency of taking out the product from the product storage 202 is higher than the first time. For example, the second time period may be determined in advance based on store cash register information.

  In addition, the second period may be a period when there are more visitors to the store where the showcase 200 is installed than in the first period. For example, the controller 204 receives the number of times of opening / closing from an opening / closing sensor installed at the door of the store, or receives the number of purchasers from the cash register of the store, to the store where the showcase 200 is installed. You may estimate the number of visitors. Then, the controller 204 may lower the inner layer circulation fan 211 at a second time when there are more shoppers entering the store than at the first time.

  Further, the second time may be a time determined in advance as a time when there are more visitors to the store where the showcase 200 is installed than the first time. For example, the second time period may be determined in advance based on the number of times of opening and closing obtained from an opening and closing sensor installed at a store door, or the number of purchasers obtained from a store cash register.

  As described above, the controller 204 reduces the output of the inner layer circulation fan 211 at the second time when the outer layer air curtain collapse due to the disturbance is larger than the first time.

  Thereby, air flows slowly in the vicinity of the cooler 205. That is, the showcase 200 reduces the wind speed of the inner layer air curtain at a time when the air of the outer layer air curtain including the air outside the case 201 enters the case 201 due to the disturbance, The air containing can be cooled.

  More specifically, the showcase 200 is operated by the cooler 205 at a time when the air in the outer layer air curtain including air outside the case 201 enters the outer layer air curtain inlet 222 or the inner layer air curtain inlet 221 due to disturbance. Sufficient time can be taken for cooling. And the showcase 200 can suppress that the load of the cooler 205 increases with external air.

  Further, the controller 204 may stop the outer layer circulation fan 212 at the second time. That is, the controller 204 may turn off the outer layer air curtain at the second time. Thereby, the showcase 200 can suppress the air in the outer layer air curtain including the air outside the case 201 from entering the inside of the case 201.

  In addition, the controller 204 may operate the outer layer circulation fan 212 at the second time. That is, the controller 204 may turn on both the inner layer air curtain and the outer layer air curtain in the second period. Thereby, the showcase 200 can continue the operation of the double air curtain, and the double air curtain can prevent the air outside the case 201 from directly entering the inside of the case 201.

  Further, the controller 204 may maintain the output of the outer layer circulation fan 212 in the second period without reducing it. In other words, the controller 204 may maintain the wind speed of the outer layer air curtain without decreasing it in the second period. As a result, the showcase 200 has an inner layer air curtain that has a large influence on the temperature of the product storage box 202 while mainly suppressing the air outside the case 201 directly entering the case 201 with the outer layer air curtain. The working air can be cooled efficiently.

  The controller 204 may reduce the output of the outer layer circulation fan 212 at the second time. That is, the controller 204 may decrease the wind speed of the outer air curtain at the second time. Thereby, the showcase 200 can reduce the amount of air in the outer layer air curtain including the air outside the case 201 entering the inside of the case 201.

  In addition, the controller 204 maintains the difference or ratio between the output of the inner layer circulation fan 211 and the output of the outer layer circulation fan 212 at the second time, and the output of the inner layer circulation fan 211 and the output of the outer layer circulation fan 212. The output may be reduced. That is, the controller 204 reduces the wind speed of the inner layer air curtain and the wind speed of the outer layer air curtain while maintaining the difference or ratio between the wind speed of the inner layer air curtain and the wind speed of the outer layer air curtain in the second period. You may let them.

  Thereby, the showcase 200 can continue the operation of the double air curtain more appropriately, and the double air curtain can more appropriately prevent the air outside the case 201 from directly entering the inside of the case 201. Can be suppressed.

  Further, the controller 204 may reduce the output of the outer layer circulation fan 212 at a second rate at a reduction rate larger than the reduction rate of the output of the inner layer circulation fan 211. That is, the controller 204 may decrease the wind speed of the outer layer air curtain at the second time with a reduction rate larger than the reduction rate of the wind speed of the inner layer air curtain. As a result, the showcase 200 can more appropriately reduce the amount of air in the outer layer air curtain including the air outside the case 201 entering the inside of the case 201.

  In FIG. 7, the controller 204 is attached to the case 201. However, the controller 204 may be included in the case 201 or may be installed at a position away from the case 201. Further, the controller 204 may be included in both or one of the inner layer circulation fan 211 and the outer layer circulation fan 212. That is, the controller 204 may be incorporated in both or one of the inner layer circulation fan 211 and the outer layer circulation fan 212.

  For example, when the controller 204 uses enthalpy, the controller 204 derives enthalpy from the temperature and humidity according to a predetermined relationship with respect to temperature, humidity, and enthalpy. Specifically, when using the enthalpy, the controller 204 may derive the enthalpy from the temperature and humidity with reference to an air diagram showing the relationship between the temperature, humidity and enthalpy. Alternatively, the controller 204 may derive the enthalpy from the temperature and humidity according to a predetermined relational expression regarding the temperature, humidity, and enthalpy.

  More specifically, the controller 204 acquires the dry bulb temperature as the temperature, acquires the absolute humidity as the humidity, and uses the following relational expression that is an example of a predetermined relational expression regarding the temperature, humidity, and enthalpy. Thus, the enthalpy may be derived.

  Enthalpy = average specific heat of dry air x dry bulb temperature + (latent heat of water at 0 ° C + average specific heat of water vapor x dry bulb temperature) x absolute humidity

  Further, each of the suction port sensor 251 and the outlet sensor 261 may be an enthalpy sensor that detects enthalpy. And the controller 204 may detect enthalpy periodically by receiving enthalpy periodically from each of the inlet sensor 251 and the outlet sensor 261.

  It should be noted that each component shown in FIG. 7 may be optionally added to the showcase 100 shown in FIG. Further, for example, the showcase 200 includes components such as a cooler 205, an inner layer circulation duct 231 and an outer layer circulation duct 232 that do not correspond to the components of the showcase 100 among the plurality of components illustrated in FIG. May not be provided. These components may be provided in a store or the like where the showcase 200 is installed.

  Moreover, when only the suction port sensor 251 is used for the detection of temperature or enthalpy among the suction port sensor 251 and the blowout port sensor 261, the showcase 200 may not include the blowout port sensor 261. Further, when the second time is defined as a time when the frequency of taking out the goods is high or a time when there are many visitors to the store, the showcase 200 includes the air inlet sensor 251 and the air outlet sensor 261. It does not have to be.

  FIG. 8 is a block diagram showing a second specific example of the showcase 100 shown in FIG. The showcase 300 shown in FIG. 8 is an open showcase installed in a store or the like, and is a showcase using a simple double air curtain. That is, FIG. 8 shows an example in which the showcase 100 shown in FIG. 4 is applied to a showcase 300 that uses a simple double air curtain.

  The showcase 300 includes a case 301, a product storage case 302, a shelf 303, a controller 304, a cooler 305, a slit 306, a cold air circulation fan 311, a non-cold air circulation fan 312, an inner layer air curtain inlet 321, a cold air circulation duct 331, An inner layer air curtain outlet 341, an outer layer air curtain outlet 342, a suction port sensor 351, and an outlet sensor 361 are provided.

  The showcase 300, case 301, merchandise storage box 302, shelf 303, controller 304, cool air circulation fan 311, non-cold air circulation fan 312 and inner layer air curtain suction port 321 in FIG. 8 are respectively shown in FIG. 100, a case 101, a product storage case 102, a shelf 103, a controller 104, a first insufflator 111, a second insufflator 112, and a suction port 121.

  The case 301 has an opening for taking out a product on the front surface. This front surface is the front surface of the case 301 and the front surface of the showcase 300. For example, the case 301 is a housing of the showcase 300.

  The commodity storage 302 is provided in the case 301. In addition, the product storage 302 includes a shelf 303. The shelf 303 is a shelf for displaying commodities. Specifically, the product is placed on the shelf 303.

  The cool air circulation fan 311 circulates the air for the inner layer air curtain by supplying air for the inner layer air curtain. Here, the inner layer air curtain corresponds to the first air curtain. When the air for the inner layer air curtain flows outside the commodity storage box 302, the inner layer air curtain is generated.

  For example, the air for the inner layer air curtain is blown out from the inner layer air curtain outlet 341, flows so as to cover the opening of the case 301, and is sucked into the inner layer air curtain suction port 321. Then, the air for the inner layer air curtain is sent from the inner layer air curtain suction port 321 to the inner layer air curtain outlet 341 through the cold air circulation duct 331.

  The cool air circulation fan 311 circulates the air for the inner layer air curtain as described above by sending the air for the inner layer air curtain through the cool air circulation duct 331. The air for the inner layer air curtain is cooled. That is, cold air is used as air for the inner layer air curtain.

  The non-cool air circulation fan 312 supplies air for the outer air curtain. Here, the outer layer air curtain corresponds to the second air curtain. The outer layer air curtain is generated by the air for the outer layer air curtain flowing outside the inner layer air curtain.

  For example, the air for the outer layer air curtain is blown out from the outer layer air curtain outlet 342 and flows outside the inner layer air curtain with respect to the commodity storage 302 so as to cover the opening of the case 301.

  The non-cool air circulation fan 312 sends the air for the outer layer air curtain as described above by supplying the air for the outer layer air curtain. Note that the air for the outer air curtain is not cooled. That is, non-cold air is used as the air for the outer air curtain.

  The cool air circulation fan 311 and the non-cool air circulation fan 312 may send air for the inner layer air curtain and air for the outer layer air curtain so that the wind speed of the inner layer air curtain and the wind speed of the outer layer air curtain are different. For example, the cool air circulation fan 311 and the non-cool air circulation fan 312 send air for the inner layer air curtain and air for the outer layer air curtain so that the wind speed of the inner layer air curtain is higher than the wind speed of the outer layer air curtain.

  Thereby, the showcase 300 can appropriately suppress air from entering the inside of the commodity storage 302 from the outside.

  The inner layer air curtain outlet 341 blows out air for the inner layer air curtain. The outer layer air curtain outlet 342 blows out air for the outer layer air curtain. Thereby, the air for the inner layer air curtain and the air for the outer layer air curtain flow so as to cover the opening of the case 301, and a double air curtain is generated.

  The inner layer air curtain suction port 321 sucks air for the inner layer air curtain. The cold air circulation duct 331 guides the air for the inner layer air curtain from the inner layer air curtain inlet 321 to the inner layer air curtain outlet 341.

  The cooler 305 cools the air for the inner layer air curtain. Specifically, the cooler 305 cools the air for the inner layer air curtain in the cold air circulation duct 331. For example, the cooler 305 is a refrigerator having a compressor or the like, and cools air by the principle of a heat pump.

  The slit 306 is provided on the back plate of the product storage case 302. The air cooled by the cooler 305 is sent from the cold air circulation duct 331 through the slit 306 to the inside of the product storage box 302. Thereby, the inside of the goods storage 302 is cooled.

  The suction port sensor 351 is a sensor that detects a suction temperature that is the temperature of the air flowing into the inner layer air curtain suction port 321. For example, the suction port sensor 351 is a thermometer that is installed at or near the inner layer air curtain suction port 321 and detects the air temperature at or near the inner layer air curtain suction port 321 as the suction temperature.

  In FIG. 8, the inlet sensor 351 is installed in the cold air circulation duct 331 at a position before the air for the inner layer air curtain passes through the cold air circulation fan 311, but the air for the inner layer air curtain is circulated in the cold air. You may install in the position after passing the fan 311. FIG. The suction port sensor 351 may be installed at an arbitrary position in the cold air circulation duct 331 before being cooled by the cooler 305.

  Further, the suction port sensor 351 may further detect suction humidity, which is the humidity of the air flowing into the inner layer air curtain suction port 321. That is, the suction port sensor 351 may be a thermohygrometer, and may detect the humidity of air at or near the inner layer air curtain suction port 321 as the suction humidity.

  The air outlet sensor 361 is a sensor that detects an air outlet temperature that is the temperature of the air flowing out from the inner layer air curtain outlet 341. For example, the outlet sensor 361 is a thermometer that is installed at or near the inner layer air curtain outlet 341 and detects the temperature of the air at or near the inner layer air curtain outlet 341 as the outlet temperature. The air outlet sensor 361 may be installed at an arbitrary position in the cold air circulation duct 331 after being cooled by the cooler 305.

  Further, the air outlet sensor 361 may further detect the air outlet humidity which is the humidity of the air flowing out from the inner layer air curtain air outlet 341. That is, the air outlet sensor 361 may be a temperature / humidity meter, and may detect the temperature of air at or near the inner layer air curtain air outlet 341 as the air outlet humidity.

  The controller 304 reduces the output of the cold air circulation fan 311 at a second time when the collapse of the outer air curtain due to the disturbance is larger than the first time. For example, the controller 304 is connected to the cold air circulation fan 311, the non-cold air circulation fan 312, the inlet sensor 351, the outlet sensor 361, and the like so as to be able to communicate with each other by wire or wirelessly.

  Then, the controller 304 controls the operation of the cold air circulation fan 311 and the non-cool air circulation fan 312 by communication, thereby operating the cold air circulation fan 311 and the non-cool air circulation fan 312. Then, the controller 304 controls the operation of the cold air circulation fan 311 and the non-cold air circulation fan 312 through communication, thereby reducing the output of the cold air circulation fan 311 at the second time when the outer layer air curtain is largely collapsed. .

  The second time may be a time when the temperature of the air flowing into the inner layer air curtain suction port 321 is higher than the first time. For example, the controller 304 may periodically detect the suction temperature by periodically receiving the suction temperature from the suction port sensor 351. Then, the controller 304 may decrease the output of the cool air circulation fan 311 at a second time when the suction temperature is higher than the first time.

  Further, the temperature of the air flowing into the inner layer air curtain suction port 321 may be a temperature relative to the temperature of the air flowing out from the inner layer air curtain outlet 341. For example, the controller 304 may periodically detect the suction temperature and the blowout temperature by periodically receiving the suction temperature and the blowout temperature from the suction port sensor 351 and the blowout port sensor 361. Then, the controller 304 may reduce the output of the cold air circulation fan 311 at a second time when the suction temperature obtained by subtracting the blowing temperature is higher than the first time.

  In particular, in the second period, the output of the cold air circulation fan 311, the output of the non-cool air circulation fan 312, and the output of the cooler 305 are constant, and the air flowing into the inner air curtain inlet 321 is constant. It may be a time when the temperature is higher than the first time. The controller 304 may reduce the output of the cool air circulation fan 311 at a second time when the temperature of the air flowing into the inner layer air curtain suction port 321 is high when these outputs are constant.

  The second time may be a time when the enthalpy of air flowing into the inner layer air curtain suction port 321 is higher than the first time.

  For example, the controller 304 may periodically detect the suction temperature and the suction humidity by periodically receiving the suction temperature and the suction humidity from the suction port sensor 351. And the controller 304 may derive | lead-out the enthalpy of the air which flows in into the inner-layer air curtain inlet 321 as a suction enthalpy based on suction temperature and suction humidity. Then, the controller 304 may reduce the output of the cool air circulation fan 311 at a second time when the suction enthalpy is higher than the first time.

  Further, the enthalpy of air flowing into the inner layer air curtain inlet 321 may be a relative enthalpy with respect to the enthalpy of air flowing out from the inner layer air curtain outlet 341.

  For example, the controller 304 periodically receives the suction temperature, the suction humidity, the blowout temperature, and the blowout humidity from the suction port sensor 351 and the blowout port sensor 361, thereby periodically changing the suction temperature, the suction humidity, the blowout temperature, and the blowout humidity. May be detected automatically.

  And the controller 304 may derive | lead-out the enthalpy of the air which flows in into the inner-layer air curtain inlet 321 as a suction enthalpy based on suction temperature and suction humidity. And the controller 304 may derive | lead-out the enthalpy of the air which flows out out of the inner-layer air curtain blower outlet 341 based on blowing temperature and blowing humidity as blowing enthalpy. Then, the controller 304 may reduce the output of the cool air circulation fan 311 at a second time when the suction enthalpy obtained by subtracting the blowing enthalpy is higher than the first time.

  In particular, in the second period, the output of the cold air circulation fan 311, the output of the non-cool air circulation fan 312, and the output of the cooler 305 are constant, and the air flowing into the inner air curtain inlet 321 is constant. The time when the enthalpy is higher than the first time may be used. The controller 304 may reduce the output of the cool air circulation fan 311 at the second time when the enthalpy of the air flowing into the inner layer air curtain suction port 321 is high when these outputs are constant.

  Further, the second time may be a time when the frequency with which the product is taken out from the product storage 302 is higher than the first time. For example, the controller 304 may acquire the frequency at which the product is taken out from the product storage 302 by receiving the frequency at which the product is purchased from a cash register of the store. Then, the controller 304 may reduce the output of the cold air circulation fan 311 at a second time when the frequency of taking out the products from the product storage 302 is higher than the first time.

  Further, the second time may be a time determined in advance as a time when the frequency with which the product is taken out from the product storage 302 is higher than the first time. For example, the second time period may be determined in advance based on store cash register information.

  In addition, the second period may be a period when there are more visitors to the store where the showcase 300 is installed than in the first period. For example, the controller 304 receives the number of times of opening / closing from an opening / closing sensor installed at the door of the store, or receives the number of purchasers from the cash register of the store, to the store where the showcase 300 is installed. You may estimate the number of visitors. Then, the controller 304 may reduce the output of the cool air circulation fan 311 at a second time when there are more customers entering the store than at the first time.

  Further, the second time may be a time determined in advance as a time when the number of visitors to the store where the showcase 300 is installed is higher than the first time. For example, the second time period may be determined in advance based on the number of times of opening and closing obtained from an opening and closing sensor installed at a store door, or the number of purchasers obtained from a store cash register.

  As described above, the controller 304 reduces the output of the cool air circulation fan 311 at the second time when the outer layer air curtain collapse due to the disturbance is larger than the first time.

  Thereby, air flows slowly in the vicinity of the cooler 305. That is, the showcase 300 reduces the wind speed of the inner layer air curtain at a time when the air of the outer layer air curtain including the air outside the case 301 enters the case 301 due to a disturbance, The air containing can be cooled.

  More specifically, the showcase 300 has sufficient time for cooling by the cooler 305 when the air in the outer layer air curtain including the air outside the case 301 enters the inner layer air curtain suction port 321 due to disturbance. You can hang it. And the showcase 300 can suppress that the load of the cooler 305 increases with external air.

  In particular, the showcase 300 using a simple double air curtain uses air outside the case 301 as an outer layer air curtain. In the second period when the outer air curtain collapses greatly, there is a high possibility that the air in the outer air curtain, that is, the outside air, enters the inner air curtain inlet 321.

  The showcase 300 takes a sufficient amount of time for the outside air to enter the inner layer air curtain inlet 321 by reducing the wind speed of the inner layer air curtain at the second time when the outer layer air curtain is largely collapsed. Air including external air can be cooled.

  The controller 304 may stop the non-cool air circulation fan 312 at the second time. That is, the controller 304 may turn off the outer layer air curtain at the second time. Thereby, the showcase 300 can suppress the air of the outer layer air curtain including the air outside the case 301 from entering the inside of the case 301.

  The controller 304 may operate the non-cool air circulation fan 312 at the second time. That is, the controller 304 may turn on both the inner layer air curtain and the outer layer air curtain in the second period. Thereby, the showcase 300 can continue the operation of the double air curtain, and the double air curtain can prevent the air outside the case 301 from directly entering the inside of the case 301.

  Further, the controller 304 may maintain the output of the non-cool air circulation fan 312 in the second period without reducing it. That is, the controller 304 may maintain the wind speed of the outer layer air curtain in the second period without reducing it. Accordingly, the showcase 300 has an inner layer air curtain that has a large influence on the temperature of the product storage case 302 while mainly suppressing the air outside the case 301 directly entering the case 301 by the outer layer air curtain. The working air can be cooled efficiently.

  In addition, the controller 304 may reduce the output of the non-cool air circulation fan 312 at the second time. That is, the controller 304 may decrease the wind speed of the outer layer air curtain at the second time. Thereby, the showcase 300 can reduce the amount of air in the outer layer air curtain including the air outside the case 301 entering the inside of the case 301.

  In addition, the controller 304 maintains the difference or ratio between the output of the cool air circulation fan 311 and the output of the non-cool air circulation fan 312 at the second time, and the output of the cool air circulation fan 311 and the non-cool air circulation fan. The output of 312 may be reduced. That is, the controller 304 reduces the wind speed of the inner layer air curtain and the wind speed of the outer layer air curtain while maintaining the difference or ratio between the wind speed of the inner layer air curtain and the wind speed of the outer layer air curtain in the second period. You may let them.

  Thereby, the showcase 300 can continue the operation of the double air curtain more appropriately, and the double air curtain can more appropriately prevent the air outside the case 301 from directly entering the inside of the case 301. Can be suppressed.

  In addition, the controller 304 may reduce the output of the non-cool air circulation fan 312 at a second rate at a rate that is greater than the rate of decrease of the output of the cool air circulation fan 311. In other words, the controller 304 may decrease the wind speed of the outer layer air curtain at a second rate at a rate that is greater than the rate of decrease of the wind speed of the inner layer air curtain. Thereby, the showcase 300 can more appropriately reduce the amount of air in the outer layer air curtain including the air outside the case 301 entering the inside of the case 301.

  In FIG. 8, the controller 304 is attached to the case 301, but the controller 304 may be included in the case 301 or may be installed at a position away from the case 301. The controller 304 may be included in one or both of the cool air circulation fan 311 and the non-cold air circulation fan 312. That is, the controller 304 may be incorporated in both or one of the cool air circulation fan 311 and the non-cool air circulation fan 312.

  Further, when the controller 304 in FIG. 8 uses enthalpy, the enthalpy may be derived from the temperature and humidity according to a predetermined relationship with respect to temperature, humidity, and enthalpy, similarly to the controller 204 in FIG.

  Further, each of the suction port sensor 351 and the outlet sensor 361 may be an enthalpy sensor that detects enthalpy. And the controller 304 may detect enthalpy periodically by receiving enthalpy periodically from each of the inlet sensor 351 and the outlet sensor 361.

  In addition, each component shown in FIG. 8 may be optionally added to the showcase 100 shown in FIG. Further, for example, the showcase 300 may not include components such as the cooler 305 and the cold air circulation duct 331 that do not correspond to the components of the showcase 100 among the plurality of components illustrated in FIG. 8. . These components may be provided in a store or the like where the showcase 300 is installed.

  In addition, when only the suction port sensor 351 of the suction port sensor 351 and the blowout port sensor 361 is used for temperature or enthalpy detection, the showcase 300 may not include the blowout port sensor 361. In addition, when the second time is defined as a time when the product is taken out frequently or when there are many shoppers, the showcase 300 includes an inlet sensor 351 and an outlet sensor 361. It does not have to be.

  The showcases 100, 200, and 300 are not limited to stores, and may be installed in factories, offices, and the like.

  As described above, the showcase or the like in the present disclosure can suppress an increase in the cooling load due to disturbance.

  In the above embodiment, each component may be configured by dedicated hardware or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. Here, the software that realizes the showcase of the above embodiment is the following program.

  That is, the program includes a step of supplying air for the first air curtain to the computer by the first air supply device, and a second air flowing outside the first air curtain by the second air supply device. Supplying air for curtains, and reducing the output of the first air feeder at a second time when collapse of the second air curtain due to disturbance is larger than the first time; Execute the showcase driving method.

  In the above embodiment, each component may be a circuit. A plurality of components may constitute one circuit as a whole, or may constitute separate circuits. Each circuit may be a general-purpose circuit or a dedicated circuit.

  As mentioned above, although the showcase etc. which concern on the one or some aspect were demonstrated based on embodiment, this indication is not limited to this embodiment. Unless it deviates from the gist of the present disclosure, various modifications conceivable by those skilled in the art have been made in this embodiment, and forms constructed by combining components in different embodiments are also within the scope of one or more aspects. May be included.

  For example, in the above-described embodiment, a process executed by a specific component may be executed by another component instead of the specific component. Further, the order of the plurality of processes may be changed, and the plurality of processes may be executed in parallel.

  The present disclosure can be used for a showcase, and can be applied to, for example, an open showcase installed in a store or the like.

100, 200, 300, 800, 900 Showcase 101, 201, 301, 801, 901 Case 102, 202, 302, 802, 902 Product storage 103, 203, 303, 803, 903 Shelf 104, 204, 304 Controller 111 1st air supply device 112 2nd air supply device 121 Suction port 205,305,805,905 chiller 206,306,806,906 slit 211,811 inner layer circulation fan 212,812 outer layer circulation fan 221,321,821, 921 Inner layer air curtain inlet 222, 822 Outer layer air curtain inlet 231, 831 Inner layer circulation duct 232, 832 Outer layer circulation duct 241, 341, 841, 941 Inner layer air curtain outlet 242, 342, 842, 942 Outer layer air curtain outlet 251, 3 1 inlet sensor 261, 361 the air outlet sensor 311,911 cold air circulating fan 312,912 non cold air circulating fan 331,931 cold air circulating duct

Claims (9)

A case having an opening for taking out products on the front surface;
A product storage provided in the case and provided with a shelf for displaying products;
A first insufflator for supplying air for the first air curtain flowing outside the commodity storage;
A second insufflator for supplying air for the second air curtain flowing outside the first air curtain;
A controller that reduces the output of the first air feeder at a second time when the collapse of the second air curtain due to a disturbance is greater than the first time. The controller operates the second insufflator at the second time;
The showcase according to claim 1. The controller reduces the output of the second insufflator at the second time;
The showcase according to claim 2. The controller stops the second insufflator at the second time;
The showcase according to claim 1. And a suction port for sucking in air for the first air curtain,
The second time is a time when the temperature of the air flowing into the suction port is higher than the first time.
The showcase according to any one of claims 1 to 4. And a suction port for sucking in air for the first air curtain,
The second time is a time when the enthalpy of air flowing into the suction port is higher than the first time.
The showcase according to any one of claims 1 to 4. The second time is a time when the frequency with which the product is taken out from the product storage is higher than the first time.
The showcase according to any one of claims 1 to 4. The second time is a time when there are more visitors to the store where the showcase is installed than the first time.
The showcase according to any one of claims 1 to 4. Feeding air for the first air curtain by the first air blower;
A step of supplying air for a second air curtain flowing outside the first air curtain by a second insufflator;
Reducing the output of the first insufflator at a second time when the collapse of the second air curtain due to a disturbance is greater than the first time.

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