JP5627523B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner, and more particularly to an air conditioner in which a refrigerating apparatus and an air conditioner have independent refrigerant circulation channels.

  FIG. 1 shows a general food store. The food store is roughly divided into a refrigerated / frozen product counter (area A), a non-refrigerated / frozen product counter (area B), and a cash register (area C). A backyard 19 (19a, 19b) for stocking merchandise is arranged on the back side of the store.

  Inside the store, there is an air conditioner 18 (18a-18i) that arranges air conditioning in the store, and showcase 2 (2a, 2b, 2e, 2j, 2s, 2w, 2t ~) that displays refrigerated and frozen foods is arranged ing. The air conditioners 18a to 18i and the showcases 2a, 2b, 2e, 2j, 2s, 2w, and 2t to the respective condensing units (refrigerators) 1 (1a to 1a) through the piping of the refrigeration cycle 20 (20a to 20i), respectively. 1i).

  The backyards 19a and 19b also include a cooler (not shown) for cooling the inside, and are connected to an independent refrigerator or a refrigerant system of any showcase.

    These air conditioners 18a to 18i and showcases 2a, 2b, 2e, 2j, 2s, 2w, and 2t may each be equipped with a remote controller for temperature setting, but they are generally managed in a lump because there are usually a large number. A system controller 41 is provided, and the system controller 41 performs temperature setting, activation, stop, abnormality display, etc. for each of the air conditioners 18a to 18i and the showcases 2a, 2b, 2e, 2j, 2s, 2w, and 2t. . Therefore, the system controller 41 is generally arranged in the store manager's room.

    Of course, the system controller is connected to all the air conditioners 18a to 18i and the showcases 2a, 2b, 2e, 2j, 2s, 2w, and 2t through a wired or wireless method to enable information communication. (Not shown).

  The showcases 2a, 2b, 2e, 2j, 2s, 2w, and 2t ~ set the temperature in the cabinet for each use, and the cases in the same temperature range are arranged side by side.

  The relationship between the showcases 2a, 2b, 2e, 2j, 2s, 2w, 2t and the condensing unit (refrigerator) 1 is usually similar to a single condensing unit 1 within the range that can be covered by the cooling capacity. The showcases 2a, 2b, 2e, 2j, 2s, 2w, 2t- of the internal temperature are connected. This is because the condensing unit 1 sets the refrigerant evaporation temperature in accordance with the lower inside temperature of the connected showcases 2a, 2b, 2e, 2j, 2s, 2w, and 2t, so that the refrigerant evaporation temperature is set. This is because the lower the load, the more work is done and the electricity bill is increased.

  Table 1 below shows the set temperature for each application of showcases 2a, 2b, 2e, 2j, 2s, 2w, and 2t as representative cases, and the target evaporation temperature of the condensing unit (refrigerator). is there.

  The set temperature of the air conditioner 18 is around 25 ° C., and tends to be higher in summer and lower in winter. This is because the sensory temperature felt by customers coming in from outside is greatly affected by the difference between the outside temperature and the awareness of energy conservation has also been recognized socially.

  Therefore, if it is summer, the air conditioner 18 and the showcases 2a, 2b, 2e, 2j, 2s, 2w, and 2t- are arranged in the same store. And showcases showcases 2a, 2b, 2e, 2j, 2s, 2w, 2t, and so on.

  In other words, both the condensing unit for the air conditioner and the refrigerator of the condensing unit for the showcase work to cool the air in the same store.

  In the following Patent Document 1, the central control unit is configured to lower the cooling operation set temperature of the air conditioner from a predetermined value according to the load of the showcase.

  In other words, by reducing the temperature in the store interior by using an air conditioner with relatively high operating efficiency and low energy consumption, it is possible to reduce the load on the open showcase and prevent a decrease in the operating efficiency of the refrigerator. When it sees as, it can improve driving | operation efficiency and can improve energy saving property.

Japanese Patent No. 4088671

  In Patent Document 1, when the air conditioner is in a cooling operation, if the operating efficiency of the refrigerator is likely to decrease due to an increase in the load of the open showcase, that is, an increase in the load of the refrigerator, the set temperature of the air conditioner decreases.

  For this reason, the temperature of the room in the store where the open showcase is installed is lowered by the air conditioner, and the amount of heat of intrusion from the outside air, which is one of the heat amounts that become the refrigeration load or the refrigeration load of the open showcase, is reduced. .

If a showcase and an air conditioner are installed in the same store, and each refrigerant circuit is independent and connected to a dedicated refrigerator, each showcase and air conditioner will cool the air in the same area. .

  Therefore, it is said that increasing the work distribution to the air conditioner having a high refrigerant evaporation temperature increases the overall efficiency and saves energy.

  Therefore, the required cooling capacity of the showcase increases as the temperature and humidity of the atmosphere as the showcase environment increase. This is caused by various factors such as the intrusion of outside air at the opening and closing of the store door, ventilation, the difference between the insulation of the wall and the outside air temperature, and the change of the air conditioning temperature.

  In this way, when the showcase environment deteriorates due to various factors and the cooling capacity becomes high, energy is saved as a whole store by increasing the distribution on the air conditioner side.

    However, since the temperature of the air blown from the air conditioner is actually lower than the set temperature, the person who directly hits the air feels colder.

  In addition, considering the temperature setting of air conditioning, it is often the case that the temperature is set so that it is not too cold and not too hot, or the employees staying there are adjusted according to the experience. Part.

  As a result, as the environment of the showcase is improved, if the set temperature of the air conditioner is lowered further, there will be a problem that the stress at low temperature will increase on the people staying there.

  The object of the present invention is to eliminate the inconvenience of the conventional example, and by appropriately distributing the work distribution of the showcase and the air conditioner in the same store, the total of the condensing units used in both the store air conditioner and the showcase The purpose of the present invention is to provide an air conditioner that suppresses the cost and realizes energy saving and prevents temperature stress on customers in the store.

The present invention of claim 1, wherein for achieving the above object, in the same store, have been facility showcases and air conditioners, independently each refrigerant circuit, the air-conditioning are connected with each dedicated refrigerator device The required cooling capacity of the showcase is insufficient due to environmental factors of the showcase based on a value obtained by subtracting the initial evaporation temperature from the target evaporation temperature (ETm) of the refrigerator of the showcase and the reference value. determine dolphin whether, if the required cooling capacity of the showcase is determined to be insufficient in environmental factors of the showcase, increases the operation of the air conditioner in the same store, the show improving the environmental factors of the case, in the case of performing control to reduce the cooling capacity of the showcase performs area classification of the store by applications and the reduction of the cooling capacity of the showcase Setting the temperature change of the air conditioner is adjusted to each area of its, the reference value, the showcase applications, and whether the air conditioner is in any operation state of cooling operation or heating operation, depending on the To do .

  According to the first aspect of the present invention, the inside of the store is divided into areas according to applications, and the temperature change of the air conditioner for reducing the cooling capacity of the showcase is adjusted for each area, for example, It is possible to prevent the increase in low-temperature stress on the people staying there because it is not necessary to cool the grocery section, that is, the showcase section, and to lower the temperature near the cash register where the movement of people stops.

The present invention according to claim 2 is an air conditioner in which a showcase and an air conditioner are installed in the same store, and each refrigerant circuit is independent and connected to a dedicated refrigerator . Based on the value obtained by subtracting the initial evaporation temperature from the target evaporation temperature (ETm) of the refrigerator and the reference value, it is determined whether the required cooling capacity of the showcase is insufficient due to environmental factors of the showcase. , if the required cooling capacity of the showcase is determined to be insufficient in environmental factors of the showcase, increases the operation of the air conditioner in the same store, improve the environmental factors of the showcase and, in the case of performing control to reduce the cooling capacity of the showcase performs area classification of the store by applications, it provided the areas that do not reduce the air conditioning in a part of the area, the reference value, before Showcase applications, and whether the air conditioner is in any operation state of cooling operation or heating operation, is to set according to.

  According to the second aspect of the present invention, in addition to the operation of the first aspect, by giving the highest consideration to people, the rank is increased and even if the temperature of the area C is changed, the area A When the cooling machine flows from B and falls below the values in the table, the temperature is not lowered even if the temperatures of the areas A and B satisfy the conditions.

According to a third aspect of the invention, when the temperature change of the air conditioner for the reduction in the cooling capacity of the showcase, if necessary to lower the temperature to areas that do not reduce the air-conditioning temperature occurs, lowering the air-conditioning temperature as no area can maintain the temperature of the current situation, and adjusts the air-conditioning temperature of the other areas.

  According to the third aspect of the present invention, in addition to the operation of the second aspect, when the area cannot be improved yet, the temperature of the other area is returned. This is because the primary purpose is to consider human health. In addition, cold air is flowing into the area C. Normally, the environmental degradation of the showcase is not only due to temperature and humidity, but the displayed food is blocking the showcase inlet, Since it can be determined that there is a special obstacle that is not normal, such as blocking the flow of wind, if the showcase cannot maintain the internal temperature in this way, the system controller that is the upper controller of the showcase or showcase By displaying abnormalities, store employees are encouraged to make improvements.

    As described above, the air conditioner of the present invention appropriately distributes the work distribution between the showcase and the air conditioner in the same store, thereby reducing the total electricity cost of the condensing units used in both the store air conditioner and the showcase. It is possible to reduce energy consumption and prevent over-cooling by an air conditioner so that it does not cause excessive stress on customers in the store.

  Hereinafter, embodiments of the present invention will be described in detail. 2 is a refrigerant circuit diagram of a showcase used in the air conditioner of the present invention, FIGS. 3 and 4 are block diagrams showing the main configuration of the measurement control device, and FIG. 5 is an enlarged view of one showcase of FIG. FIG.

  In FIG. 2, 1 is a condensing unit, for example, on the heat source side, 2a, 2b, and 2c are showcases on the load side, and this portion is shown in a sectional configuration.

  For example, the showcase 2a is for fruits and vegetables, the showcase 2b is for daily delivery, and the showcase 2c is for fresh food. White arrows in the showcases 2a, 2b, and 2c indicate the flow of air in the showcase.

  In the figure, 3 is a compressor whose rotation speed is variable by an inverter, 4 is a condenser, 5 is a liquid receiver, and 6 is an accumulator, which are built in the condensing unit 1.

  7a, 7b and 7c are electromagnetic valves, 8a, 8b and 8c are electronic expansion valves which are pressure reducing devices, 9a, 9b and 9c are evaporators, 10a, 10b and 10c are for cooling the inside of the showcases 2a, 2b and 2c. It is a fan that blows air to the object to be cooled in the showcase 2 via the evaporators 9a, 9b, and 9c, and includes electromagnetic valves 7a, 7b, and 7c, electronic expansion valves 8a, 8b, and 8c, evaporators 9a, 9b, and 9c, and a fan 10a. 10b and 10c are built in the showcases 2a, 2b and 2c.

  The liquid pipe 11 and the gas pipe 12 are refrigerant pipes connecting the condensing unit 1 and the showcases 2a, 2b, and 2c.

  The compressor 3, the condenser 4, the electromagnetic valves 7 a, 7 b, 7 c, the electronic expansion valves 8 a, 8 b, 8 c, and the evaporators 9 a, 9 b, 9 c are connected by refrigerant pipes 11, 12 to constitute a refrigeration cycle 20. .

  In particular, in the showcase used in the air conditioner of the present invention, a plurality of cooling loads are connected in parallel to one heat source, and the target cooling temperatures are individually set to cool the cooling targets to different target cooling temperatures. be able to.

  Further, 13a to 13i are refrigerant temperature sensors, 13a is the suction temperature of the compressor 3, 13b is the discharge temperature of the compressor 3, 13c is the outlet temperature of the condenser 4, 13d is the inlet temperature of the evaporator 9a, and 13e is The outlet temperature of the evaporator 9a, 13f is the inlet temperature of the evaporator 9b, 13g is the outlet temperature of the evaporator 9b, 13h is the inlet temperature of the evaporator 9c, and 13i is the outlet temperature of the evaporator 9c.

  14a to 14g are air temperature sensors, 14a is the outside air temperature around the condenser 4, 14b is the intake air temperature of the evaporator 9a, 14c is the blown air temperature of the evaporator 9a, 14d is the intake air temperature of the evaporator 9b, 14e measures the blown air temperature of the evaporator 9b, 14f measures the intake air temperature of the evaporator 9c, and 14g measures the blown air temperature of the evaporator 9c.

  15a and 15b are refrigerant pressure sensors, 15a measures the suction pressure of the compressor 3 which is the low pressure of the refrigeration cycle, and 15b measures the discharge pressure of the compressor 3 which is the high pressure of the refrigeration cycle.

  Reference numeral 16 denotes a measurement control device of the condensing unit 1, and the main configuration of the measurement control device 16 is shown in FIG.

  Based on the measured values of the refrigerant temperature sensors 13a, 13b, 13c, the air temperature sensor 14a, and the refrigerant pressure sensors 15a, 15b, the number of revolutions of the compressor 3 and the air volume of the fan 28 blown to the condenser 4 are controlled. .

  That is, the measurement control device 16 of the condensing unit 1 includes a compressor capacity control means 21 and a fan air volume control means 22. Reference numeral 17 (17a, 17b, 17c) denotes a measurement control device of each showcase 2a, 2b, 2c. The main configuration of the measurement control device 17 is shown in FIG.

  The showcase measurement control device 17 includes the refrigerant temperature sensors 13 (13a to 13i) and the air temperature sensors 14 (14a to 14g), the inlet / outlet refrigerant temperatures of the respective evaporators 9a, 9b, 9c, and the air that is blown out and sucked in Based on the measured temperature, the opening / closing of the electromagnetic valves 7a, 7b, 7c, the opening of the electronic expansion valve 8 (8a, 8b, 8c), and the air volume of the fan 10 are controlled. Further, the target cooling temperature to be cooled by the evaporators 9a, 9b, 9c input by the input means is also stored.

  That is, this showcase measurement control device 17 includes target temperature setting means 31, evaporator operation determining means 32, fan air volume control means 33, and flow resistance control means for controlling the flow resistance by controlling the opening of the electronic expansion valve 8. 34 is included.

  In addition, the measurement control device 16 of the condensing unit 1 and the measurement control device 17 of the showcases 2a, 2b, and 2c can communicate with each other, and information communication between each measurement value and the controlled device is possible. . The state of information delivery is shown by dotted lines in FIGS.

  Next, the flow of the refrigerant in this embodiment will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 3 exchanges heat with the outside air in the condenser 4 and is condensed and liquefied. Thereafter, the liquid flows into the showcases 2a, 2b, and 2c through the liquid receiver 5 and the liquid pipe 11.

  The refrigerant that has passed through the electromagnetic valves 7a, 7b, and 7c is decompressed by the electronic expansion valves 8a, 8b, and 8c to become a low-pressure two-phase refrigerant, and is then evaporated and gasified by the evaporators 9a, 9b, and 9c. Cold heat is supplied to the air blown by 10b and 10c.

  Thereafter, the refrigerant passes through the gas pipe 12 and the accumulator 6 and is sucked into the compressor 3.

  Table 2 below shows the relationship between the showcase and the condensing unit 1 installed in a certain store. Here, as shown in Table 3 to be described later, a total of 30 showcases and 11 condensing units are installed for the showcases.

    The condensing unit 1 monitors the cooling capacity state of each connected showcase. When the cooling capacity is insufficient, the condensing unit 1 lowers the evaporation temperature of the refrigerant, and vice versa. Therefore, control is performed so as not to cause excessive or insufficient cooling capacity.

  The control method itself is, for example, a method of determining that the cooling capacity is insufficient when the temperature inside the showcase chamber is higher than the set temperature, There are various methods such as a method of determining how much has occurred in a predetermined time (in this case, if the capacity is insufficient, the number of times of thermo-off decreases and eventually the thermo-off does not occur).

  When the system controller determines that the cooling capacity of the showcase is insufficient, the system controller issues a command to the condensing unit 1 to lower the evaporation temperature by setting the target evaporation temperature ETm that is lower than the refrigerant evaporation so far. The compressor unit 1 moves the compressor 3 to reach the evaporation temperature.

  Since the condensing unit 1 here is based on the premise that it is inverter controlled, it can be easily adjusted by changing the rotational speed of the compressor 3.

  Therefore, when the target evaporation temperature ETm falls below a predetermined value, this is done to increase the cooling capacity of the showcase, which is a state in which the showcase environment increases the cooling capacity, that is, the temperature becomes higher and the humidity becomes higher. Indicates that it is getting higher.

  Since the condensing unit 1 sets the initial evaporating temperature to a value that is balanced under the rated conditions, the variation of the showcase environment is determined based on the difference therefrom.

  Table 3 below shows the relationship between the assumed showcase and the condensing unit 1 in the store, and Table 4 below shows how much the ETm of the condensing unit 1 used for each application is lower than the initial ET. In this case, it is shown that the air conditioning linkage control determines that the showcase environment has deteriorated and changes the temperature of the air conditioner.

Thus, for example, condensing unit No. When ETm is 3 degrees or more lower than ET, it is determined that the showcase environment has deteriorated. In this case, one of the condensing units is in this state as a trigger. It is assumed that the set temperature of the air conditioner in the store is lowered by 2 degrees.
The left side of / indicates the trigger temperature during cooling, and the right side indicates the trigger temperature during heating.

  Of course, the trigger condition may not be the or condition but may be an and condition in accordance with the actual situation of the store, and the combination is not specified in the above example.

Each item in Table 4 will be described.
Air conditioner: An air conditioner that cools the vicinity of each showcase number .
Air conditioner set temperature change: The temperature change width of the air conditioner 18 (18a to 18i) corresponding to each showcase or condensing unit 1 performed when environmental factors of the showcase deteriorate.
Temperature change update time: Time to determine whether to lower the temperature of the air conditioner once after the showcase environment deteriorates.

  The temperature change update time is a time for which the second reduction is not performed unless this time elapses. The reason is that even if the temperature of the air conditioner is lowered, the effect cannot be obtained immediately. Without this time, the temperature of the air conditioner is lowered more and more.

  Air-conditioning set temperature shift hold time: If the set temperature of the air conditioner is lowered, even if the ETm can be improved, this time is the time for the air conditioner temperature not to return.

  Without this air conditioning set temperature shift holding time, if the temperature of the air conditioner is returned, the showcase load will become heavier, and the temperature of the air conditioner will be raised, causing the operation as a prerequisite system to drop.

  In the above condition setting, if the condition of the air conditioner cooperation trigger temperature is satisfied and the air conditioner cooperation is activated at 10:00 am, the temperature change update time is 1 hour, so the air conditioner cooperation trigger temperature is 11:00 am If established, the temperature will be lowered again. As a result, especially at the cash register, the person who works there is directly fixed and refractory and therefore directly exposed to a chilled machine.

In the present invention, in order to prevent such a situation, the store is divided into three areas and A, B, and C, respectively.
Refrigerated / frozen product area Area A
Non-refrigerated / frozen product sales area B
Cash register area C

The correspondence of Table 4 in this example is shown in Table 5.
In Table 4, the correspondence table of the air conditioners for each condensing unit was used, but here it is correspondence for each area, so in this embodiment, the area where the showcase is located is area A. did.

Table 6 shows the temperature to be lowered for each target area when the air conditioning cooperation trigger temperature is reached. The trigger update count is the air conditioning cooperation trigger temperature after the temperature change update time even if the temperature of the air conditioner is lowered once. When it becomes, it will be lowered again, so it shows the number of times after lowering.
Of course, the more times, the worse the environmental factors in the showcase.

Table 7 shows the lower limit temperature that may be lowered at the air conditioner set temperature.

Again, Table 7, at or lower temperatures down to each area, Table 6 because the temperature lowering for each area, if reached in Table 7, may the temperature lowered in Table 6 can also be increased.

In Table 7 , below this temperature is the lower limit for discomfort. However, since the human sense is affected by the relative temperature and familiarity with the outside air, there is a method of defining the range of the change amount from the initial setting to 3 degrees, even if the temperature is not set in Table 7 .

  The lower limit of the air conditioning set temperature may be either one of the absolute temperature and the amount of change, or both of them can be set appropriately depending on the situation of the store, so that the location of the foodstuff, that is, the showcase No need to lower the temperature near the cash register where people's movement stops.

  The important point here is that by giving the highest consideration to people, even if the rank goes up and the temperature in area C is changed, there is a flow of cold from areas A and B, and the values in the table In the following cases, even if the temperatures of the areas A and B satisfy Table 4 or Table 5, if the temperature is not lowered and the improvement of the area C is still not possible, the areas A and B To return the temperature. This is because the primary purpose is to consider human health.

  In other words, the area of the store is divided according to use, and the temperature change of the air conditioner to reduce the cooling capacity of the showcase is provided with at least one area where the air conditioning is not lowered to reduce the cooling capacity of the showcase. When changing the temperature of the air conditioner to reduce the air conditioning temperature to an area where the air conditioning temperature is not lowered, the air conditioning in other areas is maintained so that the area where the air conditioning temperature is not lowered can maintain the current temperature. Adjust the temperature.

  This is shown in the flow chart of FIG.

  In Rank 3, the cool air is flowing into Area C when normal showcase environmental degradation is caused not only by temperature and humidity, but also by the display foods blocking the showcase suction port, This is because it can be determined that there are special obstacles such as blocking the wind flow of the case.

  Usually, when the showcase cannot maintain the inside temperature in this way, the system controller, which is the showcase or the host controller of the showcase, displays an abnormality to prompt the store employee to make improvements.

  In the above embodiment, the store areas are classified into three, but this classification into three is one case, and as shown in Table 7 below, it is classified into four, especially customers. Service counter areas with long-term fixing may never be lowered in temperature.

  In the above embodiment, when the required cooling capacity is increased due to environmental degradation in the showcase, when improving the showcase environmental degradation with an air conditioner in the same store, the area in the store is divided for each use and staying Therefore, the rank index of the environmental classification of the area classification and the showcase introduced in the implementation example is not limited to this method.

  Further, the means for determining the environmental degradation of the showcase is not the gist of the present invention, but merely a premise, and the means there is not limited to the method given as an example in the present embodiment.

It is explanatory drawing which shows the general food store explaining implementation of this invention. It is a refrigerant circuit figure of the showcase used with the air conditioner of this invention. It is a block diagram which shows the main structures of the measurement control apparatus of a condensing unit. It is a block diagram which shows the main structures of the measurement control apparatus of a showcase. It is a flowchart of the Example of this invention.

1 (1a-1i): Condensing unit (refrigerator)
2a, 2b, 2e, 2j, 2s, 2w, 2t ~: Showcase 3: Compressor 4: Condenser 5: Liquid receiver 6: Accumulator 7a, 7b, 7c: Solenoid valve 8 (8a, 8b, 8c): Depressurization Device (electronic expansion valve)
9 (9a, 9b, 9c): Evaporator 10 (10a, 10b, 10c): Fan 11: Liquid pipe 12: Gas pipes 13a-13i: Refrigerant temperature sensors 14a-14g: Air temperature sensors 15a, 15b: Pressure sensor 16 : Measurement control device
17 (17a, 17b, 17c): Measurement control device 18 (18a-18i): Air conditioner 19 (19a, 19b): Backyard 20 (20a-20i): Refrigeration cycle 21: Compressor capacity control means 22: Fan air volume Control means 28: Fan 31: Target temperature setting means 32: Evaporator operation determination means 33: Fan air volume control means 34: Flow resistance control means 41: System controller

Claims (3)

In an air conditioner where showcases and air conditioners are installed in the same store, each refrigerant circuit is independent, and each is connected to a dedicated refrigerator .
Whether the required cooling capacity of the showcase is insufficient due to environmental factors of the showcase based on a value obtained by subtracting the initial evaporation temperature from the target evaporation temperature (ETm) of the refrigerator of the showcase and the reference value determine, wherein when the required cooling capacity of the showcase is determined to be insufficient in environmental factors of the showcase, increases the operation of the air conditioner in the same store, the showcase improved environmental factors, said in the case of performing control to reduce the cooling capacity of the showcase performs area classification of the store by application temperature change of the air conditioner for the reduction in the cooling capacity of the showcase adjusted for each area of its, especially the said reference value, the showcase applications, and whether the air conditioner is in any operation state of the cooling operation or the heating operation is set in accordance with, the And the air-conditioning system. In an air conditioner where showcases and air conditioners are installed in the same store, each refrigerant circuit is independent, and each is connected to a dedicated refrigerator .
Whether the required cooling capacity of the showcase is insufficient due to environmental factors of the showcase based on a value obtained by subtracting the initial evaporation temperature from the target evaporation temperature (ETm) of the refrigerator of the showcase and the reference value determine, wherein when the required cooling capacity of the showcase is determined to be insufficient in environmental factors of the showcase, increases the operation of the air conditioner in the same store, the showcase improved environmental factors, in the case of performing control to reduce the cooling capacity of the showcase performs area classification of the store by applications, provided the areas that do not reduce the air conditioning in a part of the area, the reference value, The air conditioner is set according to the use of the showcase and whether the air conditioner is in a cooling operation or a heating operation . When changing the temperature of the air conditioner to reduce the cooling capacity of the showcase, if the temperature needs to be lowered to an area where the air conditioning temperature is not lowered, the area where the air conditioning temperature is not lowered can maintain the current temperature. The air conditioning apparatus according to claim 2, wherein the air conditioning temperature in other areas is adjusted.

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