JP5773757B2 - Air conditioning system - Google Patents

Description

  The present invention relates to an air conditioning system, for example, an air conditioning system including a refrigerator, a showcase, and an air conditioner.

  As a conventional air conditioning system, for example, “a dehumidifying air conditioner equipped with an outside air intake device, a blower, a rotary dehumidifier, a cooling heat exchanger, and a heating heat exchanger, and air sucked from the upper part of the store An outside air humidity sensor for measuring the outside air humidity in a desiccant air conditioning system having a return air duct leading to the dehumidifying air conditioner and a supply air duct for guiding the air that has passed through the dehumidifying air conditioner to a lower part of a showcase installed in the store And adjusting the amount of ventilation from the outside air intake device by the output of the outside air humidity sensor "(see Patent Document 1).

  In such a case, “the outside air humidity sensor 45 for measuring the outside air humidity is provided, and the ventilation amount from the outside air intake device 36 is adjusted by the output of the outside air humidity sensor 45 to adjust the ventilation amount on the day when the outside air humidity is high. It is said that the dehumidification efficiency can be improved by reducing the amount of "(see Patent Document 1).

  Also, for example, “Air outlets that have been dehumidified and temperature-controlled by an air conditioner (desiccant air conditioner) are concentrated on the ceiling in correspondence with the showcases lined up in the area close to the entrance of the store floor. The suction duct for collecting the cold aisle staying on the floor surface is centrally arranged corresponding to the showcases arranged in the area close to the outlet of the sales floor ”(see Patent Document 2 and Non-Patent Document 1).

  In such a case, “the dehumidified and temperature-controlled air blown out from the ceiling toward the passageway in the area near the entrance side of the store floor is accompanied by the flow of customers moving through the passage toward the exit side. As a result, cold air pools that accumulate on the floor of the passage are blown from the inlet side region to the passage near the outlet side, and are efficiently collected in the suction duct and sent to the air conditioner. The temperature difference between the upper and lower aisles and store air can be effectively eliminated to further improve the comfort of the sales floor environment, and the heat load of the air conditioner (during store cooling) can also be reduced to save power consumption "(Patent Literature) 2).

JP 2002-22241 (Claim 1, paragraph 0029, FIG. 2) JP 2008-190826 A (paragraph 0015)

Xinjiang Industry Co., Ltd., “Dehumidification Air Conditioning System”, [online], [Search on March 2, 2011], Internet <URL: http://www.sinko.co.jp/product/desiccant.html>

  However, both Patent Documents 1 and 2 and Non-Patent Document 1 have a problem that an air conditioner is used without considering the influence on other devices in the store.

  That is, in the store, a device for displaying frozen products, refrigerated products, etc. while maintaining freshness, for example, a showcase, is arranged, and the showcase varies the cooling capacity based on the surrounding environment. For this reason, if the temperature and humidity around the showcase increases, the temperature and humidity flowing into the showcase chamber increase. In such a case, the cooling load of the showcase has to be increased.

  Therefore, if the load of the air conditioner is simply increased, the wind blown from the air conditioner flows into the showcase cabinet. As a result, a situation occurred in which the cooling load of the showcase had to be increased.

  The present invention has been made to solve the above-described problems, and is to provide an air-conditioning system that can consider the influence on other devices in the store.

The present invention is an air conditioning system that includes at least a refrigeration apparatus and an air conditioner for cooling a showcase, and is installed in a store. The refrigeration apparatus includes at least a first compressor, a first condenser, and a first decompression. Means, and a first refrigeration cycle configured by sequentially connecting the first evaporator with a refrigerant pipe, and an internal temperature sensor for measuring the internal temperature of the showcase, and the air conditioner includes at least: A second refrigeration cycle configured by sequentially connecting a second compressor, a second condenser, a second decompression means, and a second evaporator with refrigerant piping, and the second evaporator are housed, and the air volume and direction of the blown air When the change in the temperature of the showcase storage chamber exceeds a predetermined value, the air flow is first controlled so that the cooling load of the first refrigeration cycle is not increased , and then the air direction is controlled. When, It is characterized in that it comprises.

  The air conditioning system of this invention has the effect that the influence with respect to the other apparatus in a shop can be considered by providing a restriction condition in an air conditioner.

It is a figure which shows roughly the layout structure of the whole air conditioning system in Embodiment 1 of this invention. It is a figure which shows the detail of the refrigerant circuit of the freezing apparatus in Embodiment 1 of this invention. It is a figure which shows the detail of the refrigerant circuit of the air conditioner in Embodiment 1 of this invention. It is a figure which shows roughly the flow of the air of the showcase in Embodiment 1 of this invention. It is a block diagram which shows roughly the hardware constitutions of the air conditioning system in Embodiment 1 of this invention. It is an example of the temperature corresponding | compatible table of the showcase and refrigerator in Embodiment 1 of this invention. It is an apparatus number corresponding | compatible table with the showcase which shows the list of the air conditioners which influence the showcase in Embodiment 1 of this invention, and an air conditioner. It is an external view of the surface panel by the side of the cold air outlet of the air conditioner in Embodiment 1 of this invention. It is the figure which showed the wind direction which can be set with the louver of the air conditioner in Embodiment 1 of this invention. It is an upper limit setting table which shows the upper limit of the wind direction and air volume of the air conditioner in Embodiment 1 of this invention. It is a flowchart which shows the detail of a process when the temperature in showcase storehouse in Embodiment 1 of this invention rises. It is a flowchart which shows the detail of the air conditioner control process in Embodiment 1 of this invention. It is a flowchart which shows the detail of the control amount determination process in Embodiment 1 of this invention. It is a flowchart which shows the detail of the upper limit setting process in Embodiment 1 of this invention. It is a flowchart which shows the detail of the air conditioner upper limit setting process in Embodiment 1 of this invention. It is a flowchart which shows the detail of the stability confirmation process in Embodiment 1 of this invention. It is a flowchart which shows the detail of the upper limit trial process in Embodiment 1 of this invention. It is a flowchart which shows the detail of the air volume wind speed storing process in Embodiment 1 of this invention. It is a flowchart which shows the detail of a process when the showcase warehouse temperature in Embodiment 2 of this invention rises. It is a flowchart which shows the detail of the air conditioner wind direction improvement process in Embodiment 2 of this invention. It is a flowchart which shows the detail of the air conditioner air volume improvement process in Embodiment 2 of this invention. It is a flowchart which shows the detail of a process when the showcase warehouse temperature in Embodiment 3 of this invention rises. It is a figure which shows roughly the process result when the temperature in showcase storehouse in Embodiment 3 of this invention rises. It is a flowchart which shows the detail of the process which switches the reset of the upper limit value in any of Embodiment 4 of this invention to either automatic or manual. It is a figure which shows schematically the 1st selection screen in the case of switching reset of the upper limit in Embodiment 4 of this invention to either automatic or manual. It is a figure which shows roughly the 2nd selection screen in the case of switching the reset of the upper limit in Embodiment 4 of this invention to either automatic or manual. It is a flowchart which shows the detail of a process when the temperature in showcase storehouse in Embodiment 5 of this invention rises. It is a flowchart which shows the detail of the air conditioner control process in Embodiment 5 of this invention.

  Hereinafter, an embodiment of an air conditioning system according to the present invention will be described in detail with reference to the accompanying drawings.

Embodiment 1 FIG.
FIG. 1 is a diagram schematically showing a layout configuration of the entire air conditioning system according to Embodiment 1 of the present invention. As shown in the figure, the first embodiment is an application of an air conditioning system as an example of the present invention to a food store configured on one floor.

  In other words, each store in the store is provided with a refrigerated and frozen product store and a non-refrigerated and non-refrigerated product store. Furthermore, the store is provided with a cash register corner composed of a plurality of cash register counters for paying merchandise. On the other hand, on the back side of the store, backyards 10a and 10b are provided for temporarily stocking goods loaded from a truck.

  Specifically, in the refrigerated and frozen merchandise store, refrigerated and frozen foods need to be cooled at a certain temperature, and therefore showcases 2a, 2b, 2c, 2j, which can continuously cool the foods. It is sold in 2k, 2p, 2u, 2x. In this example store, the total number of showcases is 26, but 8 are described from the viewpoint of explanation based on the characteristics of the installation location. However, it goes without saying that other showcases not described here have similar characteristics.

  On the other hand, since there is no need for cooling at the non-refrigerated and non-refrigerated merchandise stores, these merchandise are usually displayed on a multi-stage display shelf or the like having no cooling capacity.

  Further, in order to keep the air temperature in the store in a comfortable state, a plurality of air conditioning indoor units 4a, 4b, 4c, 4d, 4e, and 4f are arranged at predetermined intervals on the ceiling of the store. Yes. Thereby, the air temperature of the whole store is kept comfortable.

  These showcases 2a, 2b, 2c, 2j, 2k, 2p, 2u, 2x and the air conditioning indoor units 4a, 4b, 4c, 4d, 4e, and 4f are respectively connected to the refrigerant pipes 20a, 20b, 20c, 20d, and 20e. , 20f, it is connected to a heat source machine, for example, refrigerators 1a, 1b, 1c, 1d, 1e, 1f for refrigeration or outdoor units 3a, 3b, 3c for air conditioning. On the other hand, devices (not shown) for cooling the internal space are also provided in the backyards 10a and 10b, and they are also connected via any one of the refrigerant pipes 20a, 20b, 20c, 20d, 20e, and 20f. It is connected to a heat source device, for example, one of the refrigerators 1a, 1b, 1c, 1d, 1e, and 1f for refrigeration or freezing.

  In addition, the kind of heat source machine is various, and is not limited to one, but is roughly classified by the cooling capacity with respect to the total floor area. For example, if the total floor area is up to 1000 square meters, the individual distribution method may be adopted. In this case, for example, there are room air conditioners, package air conditioners, multi air conditioners for buildings, etc., and the total floor area is 1000 square meters. In this case, for example, there are an air-cooled chiller, a water-cooled screw chiller, a turbo refrigerator, a vapor absorption refrigerator, and the like.

  Also, refrigerators 1a, 1b, 1c, 1d, 1e, 1f for refrigeration or freezing, showcases 2a, 2b, 2c, 2j, 2k, 2p, 2u, 2x, outdoor units for air conditioning 3a, 3b, 3c, The air conditioner indoor units 4a, 4b, 4c, 4d, 4e, 4f, and the backyards 10a, 10b are collectively managed by a system controller 50 installed in the store manager's room. It is connected so that it can communicate via some medium used. As a result, the system controller 50 can instruct the temperature setting, activation, and stop of the air conditioning indoor unit 4 and the showcase 2 and the like. Notification may be made by displaying an abnormality or the like on a mounted device, for example, a monitor (not shown).

  More specifically, showcases 2a, 2b, 2c, 2j, 2k, and 2p are installed on the wall of the store, and showcases 2u and 2x are installed in the middle of the aisle at the refrigerated and frozen merchandise stores. Goods etc. are displayed, and normal priced goods etc. are displayed. Further, at the time of renovation in the store, the arrangement of the showcases 2a, 2b, 2c, 2j, 2k, 2p, 2u, and 2x may be changed. Furthermore, so-called eye-catching products change depending on the time of day, season, etc., and by providing a flat stand (not shown) in the vicinity of each showcase 2a, 2b, 2c, 2j, 2k, 2p, 2u, 2x, There may be cases where the accompanying products of the products displayed in the showcases 2a, 2b, 2c, 2j, 2k, 2p, 2u, 2x are displayed. For example, when the sword fish is in season, a flat table is usually placed on the side of the showcase 2a, and seasonings and the like are sold there. In addition, the so-called decoration such as POP is also changed. Also, in the summer, for example, Saijo etc. have been put on the showcase, but suddenly the weather changes, it is replaced with another product, and POP etc. are changed every day.

  Furthermore, in the area where the showcases 2a, 2b, 2c, 2j, 2k, 2p, 2u, and 2x are installed, indoor units 4a, 4b, and 4c for air conditioning are installed on the ceiling side. The load is appropriately changed according to the air temperature.

  Therefore, the environment around the showcases 2a, 2b, 2c, 2j, 2k, 2p, 2u, 2x is constantly changing, and accordingly, the showcases 2a, 2b, 2c, 2j, 2k, 2p, 2u, 2x are related. The load will always change.

  Subsequently, showcases 2a, 2b, 2c, 2j, 2k, 2p, 2u, and 2x are not installed in the non-refrigerated and non-refrigerated merchandise stores, but the display shelves (not shown) are cooled at a predetermined temperature. There are no merchandise on display. For example, a special corner for wine etc. will be set up in autumn, and the POP will be different accordingly. Also in this region, the air conditioning indoor units 4d, 4e, and 4f are installed on the ceiling side, and the load is appropriately changed according to the ambient air temperature.

  Subsequently, cash registers 40a, 40b, 40c, 40d, and 40e are installed in the cash register counter. In the cash register counter, air conditioning indoor units 4g, 4h, and 4i are installed on the ceiling side. In addition, since the cashier counter is usually installed near the entrance of the store, it is the place where the outside air enters and exits most frequently, and the load of the air conditioning indoor unit 4 fluctuates frequently accordingly. Become.

  Next, the refrigerant circuit of the refrigeration apparatus will be described with reference to FIG.

  FIG. 2 is a diagram showing details of the refrigerant circuit of the refrigeration apparatus in Embodiment 1 of the present invention. As shown in FIG. 2, the refrigeration cycle of the refrigeration apparatus including the refrigeration or refrigeration refrigerator 1 and the showcase 2 includes a compressor 200, a condenser 201, a receiver 202, a solenoid valve 100, The electronic expansion valve 101, the evaporator 102, and the accumulator 204 are formed by being connected so as to circulate through a refrigerant pipe 20 a shown in FIG. 1, for example, including a liquid pipe 401 and a gas pipe 402. Further, a condenser fan 203 is provided in the vicinity of the condenser 201, and an internal fan 103 is provided in the showcase storage.

  That is, the high-temperature and high-pressure refrigerant compressed by the compressor 200 is condensed in the condenser 201 by the action of the condenser fan 203, and then passes through the receiver 202 that accumulates surplus refrigerant, from the refrigeration or freezing refrigerator 1a. It flows into the showcases 2a, 2b, 2c. The refrigerant that has flowed into the showcases 2a, 2b, and 2c passes through the electromagnetic valves 100a, 100b, and 100c, and is expanded by the electronic expansion valves 101a, 101b, and 101c to become a low-temperature and low-pressure refrigerant, and the evaporators 102a and 102b. , 102c evaporates by the action of the internal fans 103a, 103b, 103c, exits the showcases 2a, 2b, 2c, returns to the refrigeration or freezer 1a again, passes through the accumulator 204, and then enters the compressor 200. Return to. Thereby, the inside of the showcase can be cooled.

  Specifically, the refrigeration or freezing refrigerator 1a includes a compressor 200, a condenser 201, a receiver 202, and an accumulator 204, and the internal state of the refrigeration or freezing refrigerator 1a. For example, refrigerant temperature sensors 300, 301, 302, air temperature sensor 310, and pressure sensors 320, 321 are provided. Information measured by these sensors is appropriately collected in the freezer control device 500a. The freezer control device 500a controls the refrigerator for freezing or freezing 1a, and the information is shown in FIG. The data is also transferred to the system controller 50 and simultaneously communicated with showcase control devices 510a, 510b, and 510c described later. That is, since a plurality of cooling loads are connected in parallel to one heat source unit and each can communicate with each other, the set temperature that is the target cooling temperature of each showcase 2 can be set individually. Based on this, the products to be cooled can be cooled at different set temperatures.

  More specifically, the refrigerant temperature sensor 300 measures the refrigerant temperature on the suction side of the compressor 200, the refrigerant temperature sensor 301 measures the refrigerant temperature on the discharge side of the compressor 200, and the refrigerant temperature The sensor 302 measures the refrigerant temperature on the outlet side of the condenser 201. The air temperature sensor 310 measures the outside air temperature around the condenser 201. The pressure sensor 320 measures the refrigerant pressure on the suction side of the compressor 200 corresponding to the low pressure side of the refrigeration cycle, and the pressure sensor 321 is the refrigerant on the discharge side of the compressor 200 corresponding to the high pressure side of the refrigeration cycle. The pressure is measured. Based on these measured values, the refrigerating control device 500a executes predetermined control for driving the refrigerating or freezing refrigerator 1a, as will be described later.

  Subsequently, the showcase 2a is specifically provided with an electromagnetic valve 100a, an electronic expansion valve 101a, and an evaporator 102a, and various sensors for measuring the internal state of the showcase 2a, for example, The inlet side refrigerant temperature sensor 110a, the outlet side refrigerant temperature sensor 111a, the suction side air temperature sensor 120a, and the discharge side air temperature sensor 121a are provided, and are not shown in FIG. A discharge side internal temperature sensor 130a and a suction side internal temperature sensor 131a are provided. Information measured by these sensors is appropriately collected in the showcase control device 510a, and the showcase control device 510a controls the showcase 2a and also sends the information to the system controller 50 shown in FIG. At the same time, mutual communication is performed with the refrigerator control device 500a.

  More specifically, the inlet side refrigerant temperature sensor 110a measures the refrigerant temperature on the inlet side of the evaporator 102a, and the outlet side refrigerant temperature sensor 111a measures the refrigerant temperature on the outlet side of the evaporator 102a. The suction-side air temperature sensor 120a measures the air temperature on the suction side of the evaporator 102a, and the discharge-side air temperature sensor 121a measures the air temperature on the discharge side of the evaporator 102. FIG. Although not shown, the discharge side internal temperature sensor 130a measures the cold air outlet side of the showcase 2a as will be described in detail later, whereas the suction side internal temperature sensor 131a is a cold air intake. The mouth side is measured. Based on these measured values, the showcase controller 510a executes predetermined control for driving the showcase 2a, as will be described later.

  Although explanation is omitted here, the showcase 2b and the showcase 2c have the same configuration as the showcase 2a, and the configuration is controlled so that the inside of the showcase cabinet is appropriately cooled. Is done.

  In addition, the showcase 2 will be set to a different internal temperature for each application as will be described later. Therefore, it is possible to operate efficiently by arranging the showcases 2 having the same or similar temperature range side by side and connecting such showcase groups to the same refrigeration or freezing refrigerator 1. That is, by doing in this way, the load concerning the refrigerator 1 for refrigeration or freezing can be equalized.

  Specifically, if the inside temperatures in different temperature zones are connected to the same refrigeration or freezing refrigerator 1, the refrigeration or freezing refrigerator 1 has a possible load, that is, a possible cooling capacity. Within the range, the target evaporation temperature of the refrigerant is set so as to match the set value of the lower temperature in the cabinet of each showcase 2. Therefore, the greater the amount of decrease in the target evaporation temperature of the refrigerant, the greater the overall work load. Therefore, a plurality of showcases 2 having the same or similar temperature range as much as possible are connected together to the same refrigeration or freezing refrigerator 1. In this way, energy saving operation can be achieved. Such a so-called showcase group may be set via the system controller 50 shown in FIG.

  More specifically, as shown in FIG. 2, the showcases 2a, 2b, and 2c have the same temperature range, for example, if the inside temperature is for fruits and vegetables, the same cooling as shown in FIG. A plurality of loads are connected in parallel, and a refrigeration cycle is formed between them and the refrigerator 1a for refrigeration or refrigeration via the refrigerant pipe 20a. In this way, energy saving operation can be achieved by installing the showcases 2a, 2b, and 2c adjacent to each other at the same temperature.

  In other cases, for example, the showcase 2a may be used for fresh vegetables and fruits, the showcase 2b may be used for fresh meat, and the showcase 2c may be used for fresh food fresh fish. In such a case, as will be described in detail later, since the set temperatures for the meat and fresh fish are the same, energy saving operation can be achieved accordingly.

  Next, the refrigerant circuit of the air conditioner will be described with reference to FIG.

  FIG. 3 is a diagram showing details of the refrigerant circuit of the air conditioner according to Embodiment 1 of the present invention. As shown in FIG. 3, the refrigeration cycle of the air conditioner including the air conditioner outdoor unit 3 a and the air conditioner indoor units 4 a, 4 b, and 4 c includes a compressor 600, an outdoor heat exchanger 601, and a receiver 603. The electromagnetic valve 604, the electronic expansion valve 605, and the indoor heat exchanger 606 are connected and formed so as to circulate through the refrigerant pipe 20g shown in FIG. Further, as shown in FIG. 3, an outdoor heat exchanger fan 602 and an indoor heat exchanger fan 607 are provided.

  That is, the high-temperature and high-pressure refrigerant compressed by the compressor 600 is condensed in the outdoor heat exchanger 601 by the action of the outdoor heat exchanger fan 602, and then passes through the receiver 603 for accumulating excess refrigerant, and then the air conditioning outdoor unit. It flows into the indoor unit 4a for air conditioning from 3a. The refrigerant flowing into the air conditioning indoor unit 4 a passes through the electromagnetic valve 604 and is expanded by the electronic expansion valve 605 to become a low-temperature and low-pressure refrigerant. The indoor heat exchanger 606 After being evaporated by the action, the air conditioning indoor unit 4a is exited and returned to the compressor 600 of the air conditioning outdoor unit 3a again. Thereby, the inside of a store can be cooled.

  Specifically, the air conditioner outdoor unit 3a is provided with a compressor 600, an outdoor heat exchanger 601, and a receiver 603, and is illustrated for measuring the internal state of the air conditioner outdoor unit 3a. Various sensors that are not, for example, a refrigerant temperature sensor, an air temperature sensor, and a pressure sensor are provided. Information measured by these sensors is appropriately collected in the air conditioner control device 608a. The air conditioner control device 608a controls the air conditioner outdoor unit 3a, and the information is shown in FIG. The data is also transferred to the system controller 50 and simultaneously communicated with the above-described refrigerator control device 500a. With such a configuration, the air conditioner can be controlled in consideration of other devices as will be described in detail later.

  Subsequently, the air conditioning indoor unit 4a is specifically provided with an electromagnetic valve 604, an electronic expansion valve 605, and an indoor heat exchanger 606, and the internal state of the air conditioning indoor unit 4a is determined. Various sensors (not shown) for measurement, for example, an inlet side refrigerant temperature sensor, an outlet side refrigerant temperature sensor, a suction side air temperature sensor, and a discharge side air temperature sensor are provided. The information measured by these sensors is collected, for example, in an air conditioner indoor unit control device (not shown) as appropriate, and the air conditioner indoor unit control device causes the information to be transferred to the air conditioner control device 608a. Thus, the air conditioner control device 608a can control and control the entire air conditioner, and appropriately sends instructions to the air conditioner indoor unit 4a to harmonize the air in the store in a comfortable state. You may be made to do.

  In other words, the air conditioner tends to be controlled such that its set temperature is around 25 (° C.) throughout the year. For example, the set temperature is higher than 25 (° C.) in summer and the set temperature is lower than 25 (° C.) in winter. By doing so, it is possible to suppress the sensible temperature felt by people visiting the store and to obtain an energy saving effect. Specifically, the sensory temperature is highly influenced by the temperature difference between outside and inside. Therefore, the person can feel comfortable by devising not to widen the temperature difference.

  In the case of a store, in the summer, the air in the store is cooled by the refrigeration apparatus and the air conditioner, that is, the showcase 2 and the indoor unit 4 for air conditioning. This means that the refrigeration or refrigeration refrigerator 1 that is the first heat source machine and the air conditioning outdoor unit 3 that is the second heat source machine are working to cool the same store. means. Therefore, as will be described in detail later, when comparing the first heat source machine and the second heat source machine, energy is saved as a whole by assigning more work to the higher cooling efficiency. Can be achieved.

  In the figure, the air conditioning indoor units 4b and 4c are not described in detail, but they have the same configuration and the same functions as the air conditioning indoor unit 4a.

  Next, the flow of air in the showcase cabinet will be described with reference to FIG.

  FIG. 4 is a diagram schematically showing an air flow in the showcase 2 according to Embodiment 1 of the present invention. The showcase 2 includes an electromagnetic valve 100, an electronic expansion valve 101, and an evaporator 102. Various sensors for measuring the internal state of the showcase 2, for example, an inlet side refrigerant temperature sensor 110, an outlet side refrigerant temperature sensor 111, a suction side air temperature sensor 120, and a discharge side air temperature sensor 121 are provided. Is provided. Further, a discharge side internal temperature sensor 130 and a suction side internal temperature sensor 131 are provided. For example, the internal temperature is calculated based on the discharge side internal temperature sensor 130 and the suction side internal temperature sensor 131. As shown in FIG. 4, the flow of the wind circulating in the warehouse is shown by the solid line arrows. That is, the wind generated by the internal fan 103 is cooled by the evaporator 102. As a result, the cooled wind circulates in the warehouse and lowers the temperature in the warehouse. Further, the wind blown from the discharge port is collected at the suction port and circulates in the showcase cabinet. At this time, the outflow air as indicated by the broken line arrow is generated at the same time, and accordingly, the inflow air in the box as indicated by the broken line arrow flows into the showcase box.

  Specifically, the inflow air in the cabinet is a so-called forced intrusion from the outside so as to disturb the flow of air generated in the showcase 2. In addition, the temperature of outside air is higher than that of air circulating in the showcase cabinet. For this reason, the inside of the showcase is warmed by such inflow air in the store. As a result, the internal temperature of the showcase 2 rises rapidly, so that the load of the refrigerator 1 for refrigeration or freezing must be increased in order to maintain the preset temperature predetermined in the showcase 2.

  That is, the cooling capacity of the showcase 2 is increased. For this reason, if the air conditioner, for example, the air conditioner outdoor unit 3 and the air conditioner indoor unit 4 are operated without considering the influence on other equipment in the store, for example, the showcase 2, the showcase 2 has a large amount. In such a case, the cooling capacity of the showcase 2 increases, and as a result, energy saving cannot be achieved. In other words, energy can be saved as a whole by adjusting the air conditioner so that the internal temperature of the showcase 2 does not rise rapidly. In other words, an upper limit value as a constraint condition may be provided in the air conditioner.

  Specifically, in the store, both the outdoor unit 3 for air conditioning and the indoor unit 4 for air conditioning and the showcase 2 are working to lower the air temperature. At this time, when the internal temperature of the showcase 2 rises, the internal temperature of the air conditioner indoor unit 4 is changed so that the internal temperature of the showcase 2 reaches the set temperature. Thereby, the inflow of the air which generate | occur | produces from the indoor unit 4 for air conditioning in the showcase 2 can be prevented. These series of processes may be integrated and managed by the system controller 50.

  More specifically, the required heat quantity Q required for cooling the showcase 2 is expressed by the following equation (Equation 1).

Q = K × A × ΔT (Equation 1)
However, Q is a required refrigerating capacity, K is a heat passage rate, A is an area, and ΔT is a temperature difference.

  Here, K and A are fixed values if the structure of the showcase 2 is uniquely determined. Therefore, Q is proportional to ΔT.

  Next, ΔT is obtained from the difference between the internal temperature and the refrigerant temperature, and is expressed by the following equation (Equation 2).

ΔT = inside temperature−refrigerant temperature (Equation 2)

  Note that the internal temperature here is predetermined based on the measurement results of the discharge-side internal temperature sensor 130 on the discharge side of the showcase 2 and the suction-side internal temperature sensor 131 on the intake side of the showcase 2. It is a value calculated by performing the above arithmetic processing.

  Specifically, the internal temperature is calculated using the intake air temperature and the discharge air temperature for the evaporator 102. That is, it is calculated based on the intake air temperature measured by the suction side internal temperature sensor 131 and the discharge air temperature measured by the discharge side internal temperature sensor 130. More specifically, for example, it is obtained by an arithmetic average and is expressed by the following formula (Formula 3).

Chamber temperature = (suction air temperature + discharge air temperature) / 2 (Equation 3)

  Needless to say, the method for obtaining the internal temperature is not limited to the arithmetic mean, and may be calculated by applying a predetermined weight.

  More specifically, the required refrigeration capacity is the sum of the intrusion outside air heat amount, the radiant heat amount, the internal heat generation amount, and the wall surface heat intrusion amount of the inflow air in the cabinet. In particular, since the showcase 2 has an open showcase structure, most of it is the amount of outside air heat entering from the opening as an air curtain. Therefore, the ambient air condition has a great influence on the cooling capacity of the showcase 2. For example, if the humidity or temperature in the store rises, the enthalpy of ambient air will increase. As a result, the required refrigeration capacity is increased.

  Therefore, by adjusting the humidity and temperature in the store so as not to increase the enthalpy of the surrounding air, it is possible to stabilize the internal temperature in a state close to the ideal state without adding an extra load to the showcase. it can.

  That is, if the temperature of the ambient air rises, the required refrigeration capacity increases, so if the refrigerant temperature remains the same, ΔT also increases, and as a result, the internal temperature rises. At this time, instead of lowering the refrigerant temperature of the showcase 2, the internal temperature is stabilized by adjusting the temperature of the ambient air with an air conditioner.

  In other words, it is possible to save energy as a whole by adjusting the air conditioner so as to lower the temperature of the ambient air while preventing the inflow air from being generated in the showcase 2.

  In short, by considering the influence of the air conditioner on the showcase 2 as described in detail later, the cooling capacity that is the load of the air conditioner is increased in order to reduce the cooling capacity that is the load on the showcase 2 side. While doing so, it is possible to prevent interference with the cooling effect of the showcase 2 itself. As a result, the amount of power in the entire store can be reduced. Therefore, the air conditioner can perform an energy saving operation by considering the influence on other equipment, for example, the showcase 2.

  That is, when operating the air conditioner, the refrigerant evaporating temperature is higher than when operating the showcase 2. Therefore, the operation of the air conditioner has a smaller work amount of the compressor and a higher cooling capacity, so that the cooling efficiency is higher. Therefore, even if the work amount of the cooling operation of the air conditioner increases, the amount of electricity can be reduced as a whole if the work amount of the cooling operation of the showcase 2 is reduced.

  Needless to say, the shape of the showcase is not limited to the multistage shape as shown in FIG. 4 and may be a dual type consisting of both flat surfaces or both.

  Next, an example of the hardware configuration of the above-described showcase control device 510, the refrigerator control device 500, and the air conditioner control device 608 will be described with reference to FIG.

  FIG. 5 is a block diagram schematically showing a hardware configuration of the air-conditioning system according to Embodiment 1 of the present invention. As shown in FIG. 5, the air conditioning system as one embodiment of the present invention includes a showcase control device 510a, 510b, 510c, a refrigerator control device 500a, and an air conditioner control device 608a. It has. Since these are communicated with each other, the air conditioner control device 608a can drive the air conditioner indoor unit 4a in consideration of the influence on the showcases 2a, 2b, and 2c shown in FIG. While the store as a whole is energy-saving, the air in the store can be kept in a comfortable state.

  Further, the showcase control devices 510a, 510b and 510c, the refrigerator control device 500a, and the air conditioner control device 608a may be integrated and managed by the system controller 50 shown in FIG. In such a case, since each device in the store can be integrated and managed by the system controller 50, the air in the store can be maintained in a very comfortable state.

  Needless to say, the set temperatures of the showcases 2a, 2b, and 2c may be set individually. In such a case, for example, the showcase control device 510a shown in FIG. , 510b, and 510c individually control the showcases 2a, 2b, and 2c and communicate with the refrigerator control device 500a, so that the refrigerator control device 500a can be used for the refrigeration or refrigeration refrigerator 1a. Vary the load. Specifically, the capacity of the compressor 200 is controlled.

  Furthermore, each set temperature of the air conditioning indoor unit 4 may be individually set by a portable external terminal, for example, a remote controller. In such a case, an air conditioning indoor unit control device (not shown) is used by the user. Command is transmitted to the air conditioner control device 608a as appropriate, and the load is varied by the air conditioner control device 608a. Specifically, the capacity of the compressor 600 is controlled, and accordingly, the air volume and the air speed of the air conditioning indoor unit 4 to be described later are changed.

  Specifically, the showcase control devices 510a, 510b, and 510c include a target temperature setting unit 700, an evaporator operation determination unit 701, a fan air volume control unit 702, a flow resistance control unit 703, and an in-compartment status monitor. Means 704 and communication control means 705 are provided.

  That is, for example, various setting data input by input means (not shown) installed in the system controller 50 shown in FIG. 1, for example, the target temperature of the cooling target of the evaporator 102 shown in FIG. Various sensors such as an inlet-side refrigerant temperature sensor 110, an outlet-side refrigerant temperature sensor 111, a suction-side air temperature sensor 120, a discharge-side air temperature sensor 121, and a discharge so as to be stored in the temperature setting means 700 and become the target temperature. Based on the values measured by the side internal temperature sensor 130 and the suction side internal temperature sensor 131, the evaporator operation determining means 701 determines whether or not to operate the evaporator 102. Thereby, the evaporator operation determining means 701 controls opening and closing of the electromagnetic valve 100, the flow resistance control means 703 controls the opening degree of the electronic expansion valve 101, and the fan air volume control means 702 controls the internal fan 103. .

  Further, as will be described in detail later, the in-compartment status monitoring means 704 monitors the change in the in-compartment temperature, and when the situation changes, transmits the situation to the outside via the communication control means 705 and for the air conditioner. A control command is issued to the control device 608a.

  The communication control unit 702 controls mutual communication with the outside. Accordingly, the showcase control devices 510a, 510b, and 510c can mutually communicate with the refrigerator control device 500a, the air conditioner control device 608a, or the system controller 50.

  Subsequently, the refrigerator control device 500 a includes a compressor capacity control unit 710, a fan air volume control unit 711, and a communication control unit 712. That is, based on the measured values of various sensors, for example, the values measured by the refrigerant temperature sensors 300, 301, 302, the air temperature sensor 310, and the pressure sensors 320, 321, the compressor capacity control means 710 The rotational speed is controlled, and the fan air volume control means 711 controls the air volume of the condenser fan 203.

  The communication control unit 712 controls mutual communication with the outside. Thus, the refrigerator control device 500a can communicate with the showcase control devices 510a, 510b, 510c, the air conditioner control device 608a, or the system controller 50.

  As a result, the showcase control devices 510a, 510b, and 510c and the refrigerator control device 500a can communicate with each other, and each measurement value and information communication of the controlled device can be performed. Thereby, the refrigeration cycle of the refrigeration apparatus shown in FIG. 2 can be controlled efficiently.

  Subsequently, the air conditioner control device 608a specifically includes a compressor capacity control means 721, an outdoor heat exchanger fan air volume control means 722, a target temperature setting means 723, and an indoor heat exchanger operation determination means. 724, indoor heat exchanger fan air volume control means 725, flow resistance control means 726, louver control means 727, upper limit value control means 729, and communication control means 728.

  That is, for example, various setting data input by input means (not shown) installed in the system controller 50 shown in FIG. 1, for example, the target temperature to be cooled by the evaporator 102 is input to the target temperature setting means 723. The indoor heat exchanger operation determining means 724 operates the indoor heat exchanger 606 on the basis of values measured by various sensors, for example, a refrigerant temperature sensor and an air temperature sensor (not shown) so that the target temperature is stored. Decide whether or not to Thereby, the indoor heat exchanger operation determining means 724 controls the opening and closing of the electromagnetic valve 604, the flow resistance control means 726 controls the opening degree of the electronic expansion valve 605, and the indoor heat exchanger fan air volume control means 725 The exchanger fan 607 is controlled.

  Subsequently, the controller 608a for the air conditioner performs compression based on the measured values of various sensors, for example, values measured by a refrigerant temperature sensor, an air temperature sensor, and a pressure sensor (not shown). The number of rotations of the machine 600 is controlled, the outdoor heat exchanger fan air volume control means 721 controls the air volume of the outdoor heat exchanger fan 602, and the louver control means 727 controls the angle of the louver 801. As a result, the refrigerant circuit of the air conditioner shown in FIG. 3 is controlled.

  The communication control unit 728 controls mutual communication with the outside. Thus, the air conditioner control device 608a can communicate with the showcase control devices 510a, 510b, 510c, the refrigerator control device 500a, or the system controller 50.

  As a result, the air conditioner control device 608a and the refrigerating machine control device 500a can communicate with each other, and each measurement value and information communication of the controlled device can be performed. In other words, the air conditioner control device 608a can also communicate with the showcase control devices 510a, 510b, and 510c via the refrigerator control device 500a, and can communicate each measured value and information of the controlled device. And Thereby, the air conditioner control device 608a, the refrigerator control device 500a, and the showcase control devices 510a, 510b, 510c are the refrigerant circuit of the refrigerating device shown in FIG. 2 and the air conditioner shown in FIG. The refrigerant circuit can be controlled efficiently, and can be controlled in conjunction with each other. Therefore, the air conditioner control device 608a and the showcase control devices 510a, 510b, and 510c can be controlled in conjunction with each other.

  As a result, it is possible to provide an air conditioning system that can consider the influence on other devices in the store.

  Further, as will be described in detail later, the upper limit value control means 729 shows the showcases 2a, 2b based on the values of the upper limit value setting table described later when a control command arrives from the showcase control devices 510a, 510b, 510c. The air conditioner is controlled so as to lower the air temperature in the store while not affecting 2c. When the incoming control command is a command for setting an upper limit value, an operation for setting an upper limit value, which is a constraint condition of the air conditioner, is executed based on processing described later. The “upper limit control means 729” corresponds to the “control means” in the present invention.

  Next, the correspondence relationship between the set temperature range for each use of the showcase 2 and the target evaporation temperature of the refrigeration or freezing refrigerator 1 in that case will be described with reference to FIG.

  FIG. 6 is an example of a temperature correspondence table between the showcase and the refrigerator in the first embodiment of the present invention. As shown in FIG. 6, the use of the showcase 2 is roughly divided into refrigeration and freezing.

  Furthermore, for refrigeration, it is classified into several categories according to the characteristics of food. Specifically, fruits and vegetables, daily deliveries, dairy products, and beverages, meat and fresh fish, and meat and fresh fish that require high freshness. As is well known, fruits and vegetables are vegetables and fruits. For example, the set temperature range is 5 to 10 (° C.). Daily delivery, dairy products, and beverages are so-called processed foods, which are produced by manufacturers, require refrigeration and do not last much. An example of such a food is tofu. In this case, the set temperature range is, for example, 2 to 8 (° C.). Meat is a piece of meat prepared into slices, slicing, chopped, minced meat, etc., and fresh fish is fresh fish that has just been caught. These are common set temperature ranges, for example, −2 to 2 (° C.). The high freshness meat and fish are, for example, sashimi and the like, and since a stricter freshness is required, the set temperature range is −3 to 0 (° C.).

  Next, freezing is also classified into a plurality of categories according to the characteristics of the food, similar to refrigeration. Specifically, chilled, frozen food, and ice cream. Chilled is a so-called chilled beverage or chilled food, and is stored in a state where the beverage or food is cooled to a temperature just before freezing. The range of the set temperature in this case is, for example, −18 to −15 (° C.). Frozen food is food that is manufactured, distributed, and sold in a frozen state, and the set temperature range is, for example, -20 to -18 (° C). The range of the set temperature of ice cream is, for example, −22 to −20 (° C.).

  Next, the relationship between the showcase 2 and the refrigerator 1 for refrigeration or freezing will be described. Among the categories for refrigeration, fruits and vegetables, daily meals, dairy products, and beverages are set as the same target evaporation temperature. Here, for example, −10 (° C.). In addition, the meat and fresh fish and the high-quality meat and fresh fish are set as the same target evaporation temperature. Here, for example, it is −13 (° C.). On the other hand, in the freezing category, the target evaporation temperature is, for example, -30 (° C) for chilled foods, -35 (° C) for frozen foods, and -38 (° C) for ice cream.

  As is clear from this, energy saving operation can be achieved if a plurality of showcases having the same target evaporation temperature value of the refrigerator 1 for freezing or freezing are arranged adjacent to each other.

  Next, a showcase in which each air conditioner may have an influence depending on the load condition will be described with reference to FIG.

  FIG. 7 is a device number correspondence table between a showcase and an air conditioner showing a list of air conditioners that affect the showcase according to Embodiment 1 of the present invention. That is, as shown in FIG. 7, one air conditioner may affect a plurality of showcases 2. For example, the device number No. The air conditioner No. 1 has the equipment number No. 1. The flag 1 described in the device number correspondence table indicates that there is a possibility of affecting the show cases 2 of 1 to 9 and 21 to 23. In addition, the device number No. The air conditioner No. 2 has an equipment number No. The flag 1 described in the device number correspondence table indicates that there is a possibility of affecting the showcases 9 to 12 and 21 to 26. In addition, the device number No. No. 3 air conditioner has the equipment number No. It is indicated by the flag 1 described in the device number correspondence table that there is a possibility of affecting the show cases 2 of 12 to 20 and 24 to 26. Device No. Since the air conditioners 4 to 9 are installed on the ceiling of the area where the showcase 2 is not installed, the flag 1 does not exist.

  That is, by referring to the flag 1 described in the device number correspondence table, each air conditioner can identify which showcase 2 is likely to be affected. . As a result, by constantly acquiring values measured from various sensors in the showcase 2 that may have an impact, if it has been affected or if it is determined that there is a possibility, The air conditioner to be adjusted may adjust the load. In addition, when setting the restriction condition of the air conditioner described later, that is, the upper limit value, it can be set efficiently by referring to the device number correspondence table. Note that whether there is a possibility of affecting the future may be predicted by, for example, plotting values of various sensors in time series.

  Further, the device number correspondence table may be stored in, for example, the system controller 50 shown in FIG. By doing so, it is possible to collectively manage the showcases 2 that may have an influence. Further, the flag of the device number correspondence table may be updated each time the arrangement of the showcase 2, POP, or flat table is changed due to in-store refurbishment. By doing so, the latest correspondence relationship can always be maintained, so that an accurate air conditioning system can be provided.

  Next, the structure on the cold air outlet side of the air conditioning indoor unit 4 will be described with reference to FIG.

  FIG. 8 is an external view of surface panel 800 on the cold air outlet side of the air conditioner according to Embodiment 1 of the present invention. As shown in FIG. 8, louvers 801 a, 801 b, 801 c, and 801 d for adjusting the wind direction of the cold air outlet are installed so as to surround the suction grill 802. The louvers 801a, 801b, 801c, and 801d are installed in a direction parallel to the edge of the suction grill 802, and the suction grill 802 has a substantially rectangular shape. Therefore, if one of the louvers 801 is located on the north side, the other louvers 801 are located on either the east side, the west side, or the south side.

  That is, in such a case, for example, the louver 801a can be defined as the north side, the louver 801b as the west side, the louver 801c as the south side, and the louver 801d as the east side. Further, even if the directions are not accurate in the east, west, south, and north directions, the arrangement directions may be defined as N, W, S, and E, with each louver 801 as the north side, the west side, the south side, and the east side. By doing in this way, the arrangement | positioning relationship in the horizontal direction of a louver becomes clear, and control of the louver 801 mentioned later can be made accurate.

  Also, the louver 801a is changed to the louver No. 1, the louver 801b is changed to the louver No. 2, louver 801c is changed to louver No. 3, louver 801d is changed to louver No. It may be set as 4. In this case, when setting the upper limit value of the wind direction described later, it can be set by using the device number of the louver. In any case, there are various ways to define which louver, and it goes without saying that the method is not limited to one.

  Next, the wind direction of the louver 801 will be described with reference to FIG.

  FIG. 9 is a diagram showing wind directions that can be set by the louver of the air conditioner according to Embodiment 1 of the present invention. As shown in FIG. 9, the wind direction of the louver 801 can be set in, for example, seven stages of A, B, C, D, E, F, and G. This wind direction can be arbitrarily adjusted, and may be set in fine steps. For example, A to C is A ′, C to E is B ′, and E to G are C ′. It may be settable in three stages. In any case, the wind direction can be changed for each certain range.

  Here, for example, A may be set as the horizontal direction with respect to the ceiling, and G may be set in the vertical direction with respect to the ceiling, that is, the vertical direction. By doing in this way, the air conditioning indoor unit 4 can be controlled in consideration of the influence on the showcase 2, and furthermore, the air conditioning indoor unit 4 can make the interior of the store a comfortable environment. You can also.

  In other words, a filter (not shown) is detachably attached to the ceiling back side of the suction grille. Accordingly, when replacing the filter, the suction grill may be lowered.

  Next, the restriction condition, that is, the upper limit value of the air conditioner that is a main part of the present invention will be described with reference to FIG.

  FIG. 10 is an upper limit setting table showing the upper limit value of the wind direction and the air volume of the air conditioner according to Embodiment 1 of the present invention. As shown in FIG. 10, the air conditioner that may affect the showcase 2 is set with a predetermined restriction condition, that is, an upper limit value for the air volume and the wind direction. In other words, as long as the upper limit value described below is not exceeded, the showcase 2 is not affected, that is, the load on the showcase does not increase excessively, and the environment in the store can be kept comfortable. . Therefore, the air conditioning system which can consider the influence with respect to the other apparatus in a shop can be provided.

  In other words, as shown in FIG. No. 1 air conditioner is set with an upper limit of “medium” stage air volume. The air conditioner No. 2 has an upper limit of “weak” stage air volume, and the equipment number No. In the air conditioner No. 3, an upper limit of the “medium” stage air volume is set. In the actual driving of the air conditioner, the air volume is in one of the stages by controlling the capacity of the compressor 600 based on these upper limit values. Note that each stage of the air volume is arbitrarily determined. For example, if the air volume of the air conditioner is “strong”, “medium”, and “weak”, there are three stages, “5th speed”, “4” The speed may be set to increase as the number increases, such as “speed”, “third speed”, “second speed”, “first speed”, and in this case, there are five stages. In any case, it goes without saying that the setting range of the air volume is not defined by one method and may be in various stages.

  Next, for the wind direction, for example, an upper limit is set from seven stages A to G as shown in FIG. In the example shown in FIG. 1 air conditioner is C when the louver direction is N, A when the louver direction is W, A when the louver direction is S, and C when the louver direction is E. It has become. In addition, the device number No. The air conditioner 2 is C when the louver direction is N, A when the louver direction is W, A when the louver direction is S, C when the louver direction is E, and C when the louver direction is E. It has become. In addition, the device number No. The air conditioner 3 is C when the louver direction is N, A when the louver direction is W, A when the louver direction is S, C when the louver direction is E, and C when the louver direction is E. It has become. In this example, all the air conditioners happened to have the same wind direction with respect to the arrangement direction of each louver, but of course this is not limited to this and is set in the upper limit setting process described in detail later. It is done.

  That is, since the air conditioner is operated based on the upper limit values of the air volume and the wind direction, it is possible to provide an air conditioning system in consideration of the influence on the showcase 2.

  Next, on the premise of the configuration of the air conditioning system described above, the operation of the air conditioning system that can consider the influence on other equipment in the store, which is the main part of the present invention, will be described.

  First, details of the processing when the temperature in the showcase chamber rises will be described with reference to FIGS.

  That is, FIG. 11 is a flowchart showing the details of the process when the temperature in the showcase chamber in the first embodiment of the present invention increases, and FIG. 12 shows the air conditioner control process in the first embodiment of the present invention. FIG. 13 is a flowchart showing details of the control amount determination process in the first embodiment of the present invention.

  First, the entire process is prepared by initializing various flags and the like (S100). The various flags here are, for example, a showcase chamber temperature rise flag, a control amount change flag, and a counter, which will be described later. Of course, the flags are not limited to these, and all flags used for processing are objects of initialization. At this time, the data of the device number correspondence table shown in FIG. 7 is acquired and set. This makes it possible to control only the air conditioner that affects the showcase 2. Therefore, useless control will not be performed on an irrelevant air conditioner.

  Next, the temperature in the showcase chamber is acquired, the target temperature in the showcase chamber is acquired, and then the absolute value of the difference between the temperature in the showcase chamber and the target temperature in the showcase chamber is calculated (S101 to S103).

  Subsequently, it is determined whether or not the absolute value of the calculated difference exceeds a first predetermined value. Here, the first predetermined value is a value for determining whether or not the temperature inside the showcase is within a predetermined allowable range. That is, even if it does not coincide with the target temperature in the showcase cabinet, it is determined that the temperature in the showcase cabinet is stable within the allowable range. For example, if the first predetermined value is 3 (° C.), it is determined whether or not the absolute value of the difference between the temperature in the showcase chamber and the target temperature in the showcase chamber exceeds 3 (° C.). Moreover, it is possible to change the accuracy by changing the first predetermined value. The “first predetermined value” corresponds to the “predetermined value” in the present invention.

  That is, when the first predetermined value is exceeded (S104 YES), the showcase cabinet temperature rise flag is set to 1 (S105), and the process is shifted to the air conditioner control process (S106). On the other hand, when the first predetermined value is not exceeded (NO in S104), the process for monitoring the situation in the showcase cabinet is continued again (S101 to S104). In this way, by using the showcase cabinet temperature rise flag, it may be indicated that the showcase cabinet temperature has risen.

  Next, the air conditioner control process will be described with reference to FIG.

  First, after acquiring the set temperature of the air conditioner and acquiring the target temperature in the showcase chamber, the set temperature of the air conditioner is set to a value that approaches the target temperature in the showcase chamber (S200 to S202).

  Next, the control amount of the air conditioner is acquired from the upper limit setting table shown in FIG. 10 (S203). That is, by controlling the air conditioner based on the restriction condition acquired from the upper limit setting table, it is possible to prevent other equipment in the store, for example, the showcase 2 from being affected. In addition, since an air conditioner with high cooling efficiency is also actively used, energy saving can be achieved as a whole store.

  Next, it is determined whether or not the showcase chamber temperature rise flag is 1 (S204). That is, when the showcase chamber temperature rise flag is not 1 (NO in S204), the chamber temperature is stable, and the process is terminated as it is. On the other hand, when the temperature increase flag in the showcase chamber is 1 (S204 YES), the process proceeds to a control amount determination process for determining the control amount of the air conditioner based on the upper limit setting table (S205).

  The control amount determination process (S205) will be described with reference to FIG.

  First, it is determined whether or not the control amount change flag is 1 (S300). That is, when the control amount change flag is not 1 (NO in S300), the wind direction is set to horizontal, the air amount is set to the minimum based on the value in the upper limit setting table, and the control amount determination process is terminated. On the other hand, when the control amount change flag is 1 (S300 YES), the counter value is incremented by +1 (S303). Subsequently, it is determined whether the counter value is an odd number (S304).

  That is, when the counter value is an odd number (YES in S304), a process for determining the control amount for the air volume is performed. Specifically, it is determined whether the air volume is the upper limit value based on the value of the upper limit setting table (S305). If the air volume is the upper limit value (S305 YES), the control amount determination process is terminated as it is. On the other hand, when the air volume is not the upper limit value (NO in S305), the air volume is set one step higher and the control amount determining process is terminated.

  On the other hand, when the value of the counter is not an odd number (S304 NO), processing for determining the control amount for the wind direction is performed. Specifically, it is determined whether the wind direction is the upper limit value based on the value of the upper limit setting table (S307), and when the wind direction is the upper limit value (S307 YES), the control amount determination process is terminated as it is. On the other hand, when the wind direction is not the upper limit value (NO in S307), the wind direction is set one step lower, and the control amount determination process is terminated.

  By using a counter, the air volume is controlled at the first stage incremented by +1 from the initial value 0, then the wind direction is controlled, and thereafter the control quantity is alternately determined. . Thereby, the control of the wind direction with a larger factor affecting the showcase 2 can be executed later.

  Next, returning to FIG. 12, the processing after the control amount determination processing (S205) will be described.

  First, by driving various actuators, the air conditioner is controlled based on the determined control amount (S206). Subsequently, in order to confirm the effect of the changed control amount, the store air temperature is acquired (S207), the absolute value of the difference between the set temperature of the air conditioner and the air temperature is calculated, and the calculation result is By comparing with a predetermined value of 2, the effect given to the showcase by the air conditioner is confirmed (S208, 209). In other words, it is the temperature environment around the showcase 2 that can be determined by the processing of S208 and S209. That is, it is the state of the original role of the air conditioner. Specifically, it is a process of determining whether or not the room temperature can be cooled as set without considering the showcase 2. Therefore, it is preferable to determine based on S102 to S104 whether or not the interior of the showcase is stable. However, the flow of processing here is progressing in a direction in which the interior of the showcase 2 deteriorates. For this reason, it is not necessary to dare to incorporate the processing of S102 to S104, and the control condition when the answer is YES in S209 is the best condition.

  Subsequently, when it is equal to or less than the second predetermined value (S209 YES), the showcase cabinet temperature rise flag is set to 0 (S210), and it is determined whether the showcase cabinet temperature rise flag is 1 (S204). Since the showcase chamber temperature rise flag is not 1 (NO in S204), the air conditioner control process (S106) is terminated. On the other hand, when it is not less than or equal to the second predetermined value (NO in S209), it is further determined whether or not the control amount is the upper limit value based on the upper limit value setting table (S211).

  That is, when the control amount is the upper limit value (S211 YES), since the control amount cannot be increased any more, after the showcase chamber temperature rise flag is set to 0 (S210), the showcase chamber temperature rise flag is set. 1 is judged (S204), and since the showcase cabinet temperature rise flag is 0 (S204 NO), the air conditioner control process (S106) is terminated. On the other hand, when the control amount is not the upper limit value (NO in S211), the control amount change flag is set to 1, and then it is determined whether or not the showcase chamber temperature rise flag is 1 (S204). Since the internal temperature rise flag remains 1 (YES in S204), the process again proceeds to the control amount determination process (S205). By using the control amount flag in this manner, when the first control amount is determined, the minimum air amount and the horizontal wind direction are selected as control amounts, and thereafter, the upper limit value is sequentially approached within the upper limit value setting table. It is possible to cause the control amount to be determined step by step.

  Next, a process for setting the upper limit value will be described with reference to FIGS.

  That is, FIG. 14 is a flowchart showing details of the upper limit setting process in the first embodiment of the present invention, and FIG. 15 is a flowchart showing details of the air conditioner upper limit setting process in the first embodiment of the present invention. FIG. 16 is a flowchart showing details of the stability confirmation processing in Embodiment 1 of the present invention, and FIG. 17 is a flowchart showing details of the upper limit trial processing in Embodiment 1 of the present invention. FIG. 18 is a flowchart showing details of the air volume / wind speed storing process in the first embodiment of the present invention. In addition, the process here assumes the case where the air conditioner becomes the main body of control, for example. Further, it is assumed that a reset trigger is applied at the same timing in a plurality of air conditioners.

  First, it is determined whether there is an upper limit setting command (S400). That is, when there is no upper limit setting command (S400 NO), the process waits until there is an upper limit setting command (S400). On the other hand, when there is an upper limit setting command (S400 YES), the data of the showcase-air conditioner correspondence table (hereinafter referred to as the device number correspondence table) shown in FIG. 7 is acquired (S401), and then After initializing the air conditioner number (S402), showcase data corresponding to the air conditioner number is acquired (S403). Specifically, the device number of the air conditioner necessary for setting the corresponding upper limit value is set as the air conditioner number from the device number correspondence table, and the device number of the corresponding showcase is acquired at the same time. Then, it transfers to an air conditioner upper limit setting process (S404).

  The air conditioner upper limit setting process (S404) will be described with reference to FIG.

  First, the process proceeds to the stability confirmation process (S500). That is, the process proceeds to the stability confirmation process shown in FIG.

  Specifically, the showcase data is arranged in ascending order based on the showcase number (S600). Next, the first showcase number arranged in ascending order is set as the primary showcase number (S601). Subsequently, the showcase corresponding to the primary showcase number is selected (S602), and the selected showcase cabinet temperature is acquired (S603). Next, it is determined whether or not a predetermined time has elapsed. If the predetermined time has not elapsed (NO in S605), the process of acquiring the showcase internal temperature and storing the internal temperature is executed again (S603 and 604). On the other hand, when the predetermined time has elapsed (S605 YES), the degree of variation in the stored showcase cabinet temperature is calculated (S606). Thus, by continuing to acquire the temperature in the showcase chamber for a predetermined time, it is possible to create time-series data of the temperature in the showcase chamber during that time. By using this, it can be determined whether or not the temperature in the showcase cabinet has been stable for a certain period of time.

  The predetermined time is not particularly limited and can be changed as appropriate. The calculation method of the degree of variation in the temperature in the showcase chamber may be calculated by a method generally known to those skilled in the art. Therefore, the details are omitted here.

  Next, it is determined whether or not the calculated degree of variation is small (S607). That is, when the degree of variation is not small, that is, when it is large (NO in S607), the variation degree flag is set to 1, the stability confirmation process (S500) is terminated, and the process returns to the air conditioner upper limit value setting process shown in FIG. Processing after the stability confirmation processing (S500) is executed. On the other hand, when the degree of variation is small (S607 YES), the primary showcase number is incremented (S608), it is determined whether or not there is the corresponding showcase 2 (S609), and when there is no corresponding showcase (S609 NO). Then, after setting the variation degree flag to 0, the stability confirmation process (S500) is terminated, the process returns to the air conditioner upper limit value setting process shown in FIG. 15, and the processes after the stability confirmation process (S500) are executed. On the other hand, when there is the corresponding showcase 2 (S609 YES), after repeating the process of acquiring the showcase cabinet temperature for a predetermined time (S603 to 605), the degree of variation is calculated until the corresponding showcase 2 disappears. The above processing is repeated (S606 to 609). When the corresponding showcase 2 disappears (NO in S609), the variation degree flag is set to 0 and the stability confirmation process (S500) is terminated.

  Thus, it is possible to confirm whether the state of the internal temperature of all the showcases 2 affected by the air conditioning indoor unit 4 that is to set the upper limit value is stable.

  Next, returning to the air conditioner upper limit setting process shown in FIG. 15, processes after the stability confirmation process (S500) will be described.

  That is, it is determined whether the variation degree flag is 1 (S501). When the variation degree flag is 1 (YES in S501), since the interior temperature of the showcase is not stable, the upper limit setting process cannot be made accurate, so the air conditioner upper limit setting process (S404) is performed. 14, the air conditioner number is incremented (S405), and if there is another applicable air conditioner (YES in S406), the process for determining the upper limit value with the showcase for the air conditioner is described above. (S403 to 406). On the other hand, when there is no corresponding air conditioner (NO in S406), the upper limit setting process is terminated.

  Next, returning to FIG. 15, processing when the variation degree flag is not 1 will be described.

  That is, when the variation degree flag is not 1 (NO in S501), the target temperature in the showcase chamber is acquired (S502), the air temperature is acquired (S503), and the absolute value of the difference between the air temperature and the target temperature in the showcase chamber is calculated. It is calculated (S504), and it is determined whether or not the calculation result is a third predetermined value or more (S505). The third predetermined value here is, for example, 5 (° C.), and means that the air temperature in the store is higher than the target temperature in the showcase cabinet by that amount. By providing such conditions, it is possible to accurately set an upper limit value to what extent the air conditioner can be operated when there is a certain temperature difference. Specifically, by providing a determination of the third predetermined value, the upper limit trial process is not performed when the difference between the air temperature and the temperature in the showcase chamber is small. The reason is that when the internal temperature rises in this state, it is not in an environment where an upper limit value can be set. Therefore, the process is not shifted to the upper limit trial process.

  That is, when the value is equal to or greater than the third predetermined value (S505 YES), the process proceeds to the upper limit trial process (S506). When the value is not equal to or greater than the third predetermined value (S505 NO), the air conditioner upper limit value setting process (S404) is performed. 14 and return to FIG. 14, while there is another air conditioner, the air conditioner upper limit value setting process shown in FIG. 15 is repeated (S403 to 406).

  Next, the upper limit trial process will be described with reference to FIG.

  First, the air conditioner corresponding to the air conditioner number is selected (S700), and then the wind direction is set to the downward direction farthest from the horizontal direction (S701), and the flow shifts to the air volume / wind speed storing process (S702).

  In the air volume / air speed storage process (S702), as shown in FIG. 18, first, after setting the air volume to the minimum (S800), various actuators are driven to control the air conditioner (S801). That is, the air conditioner is driven in a state where the wind direction is downward and the air volume is minimum.

  Next, a showcase corresponding to the primary showcase number is selected (S802), and it is determined whether or not the same air volume duration has elapsed (S803). When the same air volume duration time has not elapsed (NO in S803), the air conditioner is continuously driven in that state until it elapses. On the other hand, when the same air volume continuous relaxation has elapsed (YES in S803), the process proceeds to the process of checking the internal temperature (S804 to 807). By doing in this way, in this case, the process for determining whether or not the internal temperature has increased with the minimum wind volume in the downward wind direction will be described later.

  Next, the selected showcase chamber temperature is acquired (S804), and in S502, the chamber temperature data of the current showcase number is acquired from the stored chamber temperatures (S805). The internal temperature is compared (S806). At this time, when it is not increased (NO in S807), the air volume is set to one step, and the process returns to S803 again to determine whether or not the internal temperature increases with the air volume, and an upper limit is tried (S803 to S803). 807). On the other hand, when it rises (S807 YES), the air volume and direction before the rise are stored (S809, 810). That is, the upper limit value data is stored. Subsequently, the primary showcase number is decremented, and when there is a corresponding showcase (YES in S812), the process returns to S802 and the above processing is repeated. On the other hand, when there is no corresponding showcase (NO in S812), the air volume / air speed storing process (S702) is terminated, and the process returns to FIG. 17 to execute the processes after the air volume / air speed storing process (S702).

  Next, it is determined whether or not all wind directions have been tried (S703). That is, when not all the wind directions have been tried (S703 NO), after setting the wind direction one step upward (S704), the process returns to the air volume / wind speed storing process (S702) and repeats the above process (S702, 703). On the other hand, when all the wind directions have been tried (S703 YES), the maximum air volume is searched from the stored air volumes (S705), the wind direction corresponding to the searched maximum air volume is searched (S706), and the search result. Is acquired (S707). Subsequently, it is determined whether or not there are a plurality of maximum airflows as search results. That is, when there are not a plurality of maximum airflows in the search results (NO in S708), the search results are stored as the airflow upper limit value and the wind direction upper limit value (S709), the upper limit value trial process (S506) is terminated, and the air conditioner upper limit value setting process (S404) is ended, the process returns to the upper limit value setting process of FIG. 14, and the above process is repeated while there is another air conditioner (S403 to 406). On the other hand, when there are a plurality of search result maximum air volumes (YES in S708), the search result air volume is stored as the air volume upper limit value (S710), and then the wind direction closest to the horizontal is selected from the plurality of search results. (S711), the upper limit value trial process (S506) is terminated, the air conditioner upper limit value setting process (S404) is terminated, the process returns to the upper limit value setting process of FIG. While there is, the above process is repeated (S403 to 406).

  By doing in this way, the wind direction of the downward direction which may have influence on the showcase 2 as much as possible, and the direction of the wind near it are avoided, and the wind direction near horizontal with few influences is selected. As a result, it is possible to set an upper limit value that can improve the environment of the showcase while avoiding an increase in the internal temperature of the showcase 2 due to the air conditioner.

  As shown in FIGS. 14 to 18, the upper limit value setting process, the air conditioner upper limit value setting process, the stability confirmation process, the upper limit value trial process, and the air volume / wind speed storing process are sequentially called and repeated, so that FIG. A value is set in the upper limit value setting table as shown, and this is the upper limit value that is a constraint condition of the air conditioner. By using this upper limit setting table, an air conditioning system that takes into account the influence of other equipment, for example, a showcase, can be realized.

Embodiment 2. FIG.
In the first embodiment, the air conditioning system is based on the upper limit value obtained in advance outside the business hours, but in the second embodiment, an example in which the upper limit value is dynamically changed during the business hours is illustrated in FIGS. 21 will be described.

  FIG. 19 is a flowchart showing details of the processing when the temperature in the showcase chamber according to the second embodiment of the present invention increases, and FIG. 20 shows the air conditioner wind direction improving processing according to the second embodiment of the present invention. FIG. 21 is a flowchart showing details of the air conditioner air volume improvement processing according to Embodiment 2 of the present invention.

  Here, in the flowchart shown in FIG. 19, although reference numerals are different in S900 to 905, the processing is the same as S100 to S105 in FIG. That is, the specific differences from Embodiment 1 are the air conditioner wind direction improvement process (S907) and the air conditioner air volume improvement process (S909), and the wind direction improvement flag and the air volume improvement flag are used for the determination of the process. It is a point to use.

  First, it is determined whether or not the wind direction improvement flag is 1 (S906). That is, when the wind direction improvement flag is not 1 (NO in S906), the process proceeds to the air conditioner wind direction improvement process (S907). In contrast, when the wind direction improvement flag is 1 (YES in S906), it is subsequently determined whether or not the air volume improvement flag is 1 (S908). That is, when the air volume improvement flag is 1 (YES in S908), the process is terminated as it is. When the air volume improvement flag is not 1 (NO in S908), the process proceeds to the air conditioner air volume improvement process (S909).

  Next, the air conditioner wind direction improving process (S907) will be described with reference to FIG.

  First, it is determined whether or not the showcase cabinet temperature rise flag is 1 (S1000). That is, when the temperature increase flag in the showcase chamber is not 1 (S1000 NO), the air conditioner wind direction improvement process (S907) is terminated, the process returns to S901 in FIG. 19, and the processes of S901 to S906 are repeated. On the other hand, when the showcase chamber temperature rise flag is 1 (YES in S1000), it is determined whether or not the wind direction improvement counter is larger than the wind direction improvement maximum value. That is, when the wind direction improvement counter is larger than the wind direction improvement maximum value (S1001 YES), since there are no options for improving the wind direction, the wind direction improvement flag indicating that the wind direction has been improved is set to 1 (S1005), and air conditioning is performed. The machine wind direction improvement process (S907) is terminated, the process returns to S901 of FIG. 19, and the processes of S901 to S906 are repeated. On the other hand, when the wind direction improvement counter is equal to or less than the wind direction improvement maximum value (NO in S1001), the wind direction is changed by one step (S1002), and various actuators are driven to control the air conditioner with the changed control amount. It is driven (S1003), the wind direction improvement counter is incremented (S1004), the air conditioner wind direction improvement process (S907) is terminated, the process returns to S901 in FIG. 19, and the processes of S901 to S906 are repeated.

  Next, the air conditioner air volume improvement processing (S909) will be described with reference to FIG.

  First, it is determined whether or not the showcase cabinet temperature rise flag is 1 (S1100). That is, when the showcase chamber temperature rise flag is not 1 (NO in S1100), the air conditioner air volume improvement process (S909) is terminated, the process returns to S901 in FIG. 19, and the processes of S901 to S906 are repeated. On the other hand, when the temperature increase flag in the showcase cabinet is 1 (YES in S1100), it is determined whether the air volume is minimum (S1101). That is, when the air volume is minimum (S1101 YES), since there are no further air volume improvement options, the air volume improvement flag indicating that the air volume has been improved is set to 1 (S1005), and the air conditioner air volume improvement process (S907). ) Is terminated, the process returns to S901 in FIG. 19, and the processes of S901 to S906 are repeated. On the other hand, when the air volume is not minimum (NO in S1101), the air volume is reduced by one step (S1102), and various actuators are driven to drive the air conditioner with the changed controlled variable (S1103). The harmony air volume improvement process (S909) is terminated, the process returns to S901 in FIG. 19, and the processes of S901 to S906 are repeated.

  By doing in this way, even if the upper limit value is not suitable during business hours due to the replacement of POP or the like, the increase / decrease value can be changed dynamically, so that energy saving can be achieved.

  In the second embodiment, items that are not particularly described are the same as those in the first embodiment, and the same functions and configurations are described using the same reference numerals.

Embodiment 3 FIG.
Next, processing for notifying the outside when the temperature in the showcase chamber rises will be described with reference to FIGS.

  FIG. 22 is a flowchart showing details of processing when the temperature in the showcase chamber according to the third embodiment of the present invention increases, and FIG. 23 shows an increase in the temperature in the showcase chamber according to the third embodiment of the present invention. It is a figure which shows roughly the process result in the case of having performed.

  The difference from the first embodiment is that the notification is made to the outside. That is, although the reference numerals are different, S100 to S104 and S1200 to S1204 are the same processing, and thus the description thereof is omitted.

  That is, in S1205, the status of the showcase is notified to the outside. As this notification means, for example, a notification may be given on a display screen (not shown) of the system controller 50 as shown in FIG. As shown in FIG. 23, when the inside temperature of the showcase with the device number 1 becomes abnormally high, the characters “high temperature abnormality” and “abnormality monitor” are shown in bold and in a font larger than the others. You may do it. At this time, the date and time may be displayed at the same time to provide information useful for pursuing the cause.

  Of course, the notification method is not limited to this, and it goes without saying that all forms that can be recognized by a person are possible.

  Note that in Embodiment 3, items that are not particularly described are the same as those in Embodiment 1 or 2, and the same functions and configurations are described using the same reference numerals.

Embodiment 4 FIG.
Next, processing for switching the setting of the upper limit value to either manual or automatic will be described with reference to FIGS.

  FIG. 24 is a flowchart showing details of processing for switching the resetting of the upper limit value to either automatic or manual in the fourth embodiment of the present invention, and FIG. 25 shows the upper limit value in the fourth embodiment of the present invention. FIG. 26 is a diagram schematically showing a first selection screen when switching the resetting of automatic to manual or manual, and FIG. 26 illustrates automatic or manual resetting of the upper limit value according to the fourth embodiment of the present invention. It is a figure which shows schematically the 2nd selection screen in the case of switching to either of these.

  First, it is determined whether the reset start trigger mode has arrived (S1300). That is, when the reset start trigger mode is automatic (S1300 automatic), after the reset standby time has elapsed (YES in S1301), the process proceeds to the upper limit setting process shown in FIG. If the reset waiting time has not elapsed (NO in S1301), the process waits until the time elapses. On the other hand, when the reset start trigger mode is manual (S1300 manual), it is determined whether or not there is a reset command (S1304), and when there is no reset command (S1304 NO), the setting process is performed. It is determined whether or not to end (S1303), and if it is ended (S1303 YES), the process ends as it is. On the other hand, if not completed (NO in S1303), the processes of S1300 to S1302 described above are repeated.

  Here, a selection screen display example will be described with reference to FIGS.

  As shown in FIG. 25, a selection screen for switching to manual operation is displayed. At this time, when “3. Manual operation” is selected (S1300 manual in FIG. 24), the screen shifts to the screen shown in FIG. 26 and a selection screen as to whether or not to reset the upper limit value is displayed. At this time, when “START” is selected (YES in S1304 in FIG. 24), the process proceeds to the upper limit setting process.

  In this way, it is possible to switch between manual and automatic.

  In Embodiment 4, items that are not particularly described are the same as those in Embodiments 1 to 3, and the same functions and configurations are described using the same reference numerals.

Embodiment 5 FIG.
Next, a process for checking the temperature in the showcase chamber again after controlling the air conditioner when the temperature in the showcase chamber is increased will be described with reference to FIGS.

  FIG. 27 is a flowchart showing details of the process when the temperature in the showcase chamber according to the fifth embodiment of the present invention increases, and FIG. 28 shows the details of the air conditioner control process according to the fifth embodiment of the present invention. It is a flowchart which shows.

  Here, the difference from Embodiment 1 is that the temperature in the showcase cabinet is confirmed again. Therefore, although the reference numerals are different, S100 to S105, S200 to S210, S211 and S212 are the same processes as S1400 to S1405, S1500 to S1510, S1512 and S1513, and thus description thereof will be omitted.

  First, in S1406, the process proceeds to the air conditioner control process. Subsequently, after executing the predetermined process, the air conditioner control process end flag is set to 1 in S1511, and after the predetermined determination, the processes of S1401 to 1404 in FIG. 27 are performed. In S1407, the air conditioner control process end flag is set. Whether the process is repeated or finished is determined by the determination. That is, at this time, the temperature inside the showcase is once again confirmed, and since the first predetermined value is not exceeded (NO in S1404), it can be directly confirmed that the temperature inside the showcase has become stable.

  In the fifth embodiment, items that are not particularly described are the same as those in any of the first to fourth embodiments, and the same functions and configurations are described using the same reference numerals.

  As described above, the air conditioning system according to the present embodiment has an effect that the influence on other devices in the store can be taken into account by providing the air conditioner with the constraint condition. Therefore, energy saving can be achieved.

  1, 1a, 1b, 1c, 1d, 1e, 1f: refrigerator for refrigeration or freezing, 2, 2a, 2b, 2c, 2j, 2k, 2p, 2u, 2x: showcase, 3, 3a, 3b, 3c : Outdoor unit for air conditioning 4, 4, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i: indoor unit for air conditioning 10, 10a, 10b: backyard, 20, 20a, 20b, 20c, 20d, 20e, 20f, 20g, 20h, 20i: refrigerant piping, 40, 40a, 40b, 40c, 40d, 40e: cash register, 50: system controller, 100, 100a, 100b, 100c, 604: solenoid valve, 101, 101a , 101b, 101c, 605: electronic expansion valve, 102, 102a, 102b, 102c: evaporator, 103, 103a, 103b, 103c: internal fan, 11 : Inlet side refrigerant temperature sensor, 111: outlet side refrigerant temperature sensor, 120: suction side air temperature sensor, 121: discharge side air temperature sensor, 130: discharge side internal temperature sensor, 131: suction side internal temperature sensor, 200 , 600: compressor, 201: condenser, 202, 603: receiver, 203: condenser fan, 204: accumulator, 300, 301, 302: refrigerant temperature sensor, 310: air temperature sensor, 320, 321: pressure sensor, 401: Liquid pipe, 402: Gas pipe, 500, 500a: Control device for refrigerator, 510, 510a, 510b, 510c: Control device for showcase, 601: Outdoor heat exchanger, 602: Fan for outdoor heat exchanger, 606 : Indoor heat exchanger, 607: Indoor heat exchanger fan, 608, 608a: Air conditioner control device, 700, 72 : Target temperature setting means, 701: evaporator operation determining means, 702, 711: fan air volume control means, 703, 726: flow resistance control means, 704: interior condition monitoring means, 705, 712, 728: communication control means, 710, 721: compressor capacity control means, 722: outdoor heat exchanger fan air volume control means, 724: indoor heat exchanger operation determination means, 725: indoor heat exchanger fan air volume control means, 727: louver control means, 729: Upper limit control means, 800: surface panel of indoor unit for air conditioning, 801, 801a, 801b, 801c, 801d: louver, 802: suction grille.

Claims (11)

At least a refrigeration apparatus and an air conditioner for cooling a showcase, and an air conditioner system installed in a store,
The refrigeration apparatus is
A first refrigeration cycle configured by sequentially connecting at least a first compressor, a first condenser, a first pressure reducing means, and a first evaporator with a refrigerant pipe;
An internal temperature sensor for measuring the internal temperature of the showcase,
The air conditioner is
A second refrigeration cycle comprising at least a second compressor, a second condenser, a second decompression means, and a second evaporator connected in order by refrigerant piping;
An indoor unit in which the second evaporator is housed and the air volume and direction of the blown air can be varied;
Control means for controlling the air volume first and then controlling the air direction so as not to increase the cooling load of the first refrigeration cycle when the change in the temperature inside the showcase exceeds a predetermined value. An air conditioning system characterized by that.   When controlling the air volume, the control means increases the cooling load of the first refrigeration cycle stepwise within a range where the cooling load is not increased, and when controlling the wind direction, the control means moves from a horizontal direction to a vertical direction within a range where the cooling load is not increased. The air conditioning system according to claim 1, wherein the air conditioning system is lowered step by step.   When the wind direction that does not increase the cooling load of the first refrigeration cycle is set as the wind direction upper limit value, the control means sets the wind direction to the downward most far from the horizontal direction, and gradually increases the angle while increasing the angle. The air conditioning system according to claim 1 or 2, wherein a wind direction in front of the case where the internal temperature of the case rises is determined as a wind direction upper limit value.   When the air volume that does not increase the cooling load of the first refrigeration cycle is set as the air volume upper limit value, the control means sets the air volume to the minimum and increases the temperature inside the showcase while gradually increasing the air volume. The air conditioning system according to any one of claims 1 to 3, wherein an air volume before the air flow is determined as an air volume upper limit value.   The said control means tries the air volume upper limit which is an air volume which does not increase the cooling load of a said 1st freezing cycle by increasing an air volume in steps for every one wind direction, It is characterized by the above-mentioned. Item 5. The air conditioning system according to any one of Items 1 to 4.   When the cooling load of the first refrigeration cycle increases at a wind direction upper limit value that is a wind direction that does not increase the cooling load of the first refrigeration cycle that has been set once, the control means increases the wind direction stepwise in the horizontal direction. The air conditioning system according to any one of claims 1 to 5, wherein a wind direction upper limit value that is a wind direction that does not increase a cooling load of the first refrigeration cycle is determined again.   The control means reduces the air volume stepwise when the cooling load of the first refrigeration cycle increases at an air volume upper limit value that is an air volume that does not increase the cooling load of the first refrigeration cycle once set. The air conditioning system according to any one of claims 1 to 6, wherein an air flow upper limit value that is an air flow that does not increase the cooling load of the first refrigeration cycle is determined again.   The control means includes the first airflow direction upper limit value that is a wind direction that does not increase the cooling load of the first refrigeration cycle that has been set once, and the airflow upper limit value that is the airflow amount that does not increase the cooling load of the first refrigeration cycle once set. When the cooling load of one refrigeration cycle is increased, an airflow upper limit value that is a wind direction that does not increase the cooling load of the first refrigeration cycle that has been set once is determined again, and then the air volume that does not increase the cooling load of the first refrigeration cycle The air conditioning system according to any one of claims 1 to 7, wherein an air volume upper limit value is determined again.   The said temperature monitoring means is further provided with a means to alert | report that the change of the said internal temperature exceeded the predetermined value, when the change of the internal temperature of the said showcase exceeded a predetermined value, The said monitoring case is further provided. The air conditioning system according to any one of 1 to 8.   Whether or not the control means again sets a wind direction upper limit value that is a wind direction that does not increase the cooling load of the first refrigeration cycle, and an air volume upper limit value that is an air volume that does not increase the cooling load of the first refrigeration cycle. The air conditioning system according to any one of claims 1 to 9, further comprising means for switching to manual operation when the operation is automatically performed.   Whether or not the control means again sets a wind direction upper limit value that is a wind direction that does not increase the cooling load of the first refrigeration cycle, and an air volume upper limit value that is an air volume that does not increase the cooling load of the first refrigeration cycle. The air conditioning system according to any one of claims 1 to 10, further comprising means for switching to automatic operation when the operation is performed manually.

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