JP2011149654A - Energy saving system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy saving system reducing energy consumption used in an air-conditioning space in a store etc. and improving temperature environment within the air-conditioning space. <P>SOLUTION: The energy saving system includes: a plurality of air-conditioning units 18 connected to a central control part 62, arranged on the ceiling of the store and air-conditioning inside of the store; a first temperature and humidity sensor 22 connected to the central control part 62 and detecting the temperature and humidity within the store; and a schedule timer 70 connected to the central control part 62 and setting an opening time zone of the store and a closing time zone of the store. The central control part 62 includes: a time determinator 6202 determining whether time of the schedule timer 70 is the opening time zone of the store or the closing time zone; and a dehumidification operation controller 6204 performing dehumidification operation of part of the air-conditioning units 18 so that a measurement value of humidity detected by the first temperature and humidity sensor 22 becomes a preset set value within the closing time zone when the closing time zone is determined by the time determinator 6202 and leveling an air-conditioning load. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an energy saving system for reducing energy consumption in air-conditioned spaces such as food stores and restaurants such as convenience stores or living spaces, and more specifically, air-conditioning ventilation equipment, freezing / refrigeration equipment, lighting equipment in stores It is related with the energy-saving system which made energy-saving operation possible.

  Under recent circumstances where the environmental impact of carbon dioxide emissions is a concern, there is a need to reduce the amount of energy used in food stores and offices (office buildings, hotels, hospitals, etc.). In response to this, laws on the rationalization of energy use have been revised, and the rationalization of energy use has become mandatory even in food stores and business establishments that use various mechanical and electrical equipment.

  In food stores such as convenience stores having electrical equipment including lighting, air conditioning ventilation equipment, freezing / refrigeration equipment, etc., various measures have been proposed as energy saving measures for electric power used for these. As one of them, energy saving is performed for each equipment by replacing air-conditioning ventilation equipment, refrigeration / refrigeration equipment, lighting equipment, etc. with equipment with high efficiency (for example, refer to Patent Document 1).

JP 2000-205708 A

  By the way, in recent food stores and the like, food safety and needs for fresh foods and frozen foods are increasing, and therefore, a large number of frozen and refrigerated showcases are installed in stores. Along with this, the amount of cold air flowing into the store from the freezer / refrigerated showcase also increases, affecting the air conditioning in the store. Especially in the winter, the contradiction situation is becoming noticeable, where the air-conditioning equipment heats the inside of the store while the cold air flowing out from the freezer / refrigerated showcase cools the inside of the store.

Conventionally, when newly installing or refurbishing air-conditioning ventilation equipment, refrigeration / refrigeration equipment, and lighting equipment in food stores, etc., it is often introduced and operated separately for air-conditioning ventilation equipment, refrigeration / refrigeration equipment, and lighting equipment. . Therefore, as described above, the temperature environment in the store is in a contradictory situation, and a situation where energy is used more than necessary can be seen.
Therefore, at present, BEMS is often introduced as an energy management system for large-scale buildings, but it is difficult to introduce it from a cost-effective relationship in small and medium-sized food stores.

  The present invention has been made in view of the above points, and its purpose is to reduce energy consumption used in air-conditioning ventilation equipment, freezing / refrigeration equipment, lighting equipment, etc. It is to provide an energy saving system that can improve the temperature environment and can be introduced at low cost.

  In order to achieve the above object, the present invention is an energy saving system, comprising a central control unit and a plurality of air conditioning units that are connected to the central control unit and are arranged near the ceiling of an air-conditioned space to air-condition the interior of a store. A unit, a first temperature / humidity sensor connected to the central control unit for detecting the temperature and humidity in the air-conditioned space, and connected to the central control unit for setting the business hours of the air-conditioned space and the business hours of the air-conditioned space A time determination unit that determines whether the time of the schedule timer is a business time zone or a business suspension time zone of the air-conditioned space, and the time judgment unit is a business suspension time zone. The humidity detected by the first temperature / humidity sensor during a predetermined time within the business suspension time period when a part of the plurality of air conditioning units is determined. And having a dehumidifying operation control means measured value to the dehumidifying operation so that the preset value.

  According to the energy saving system of the present invention, it is possible to reduce energy consumption used in air-conditioned ventilation equipment, refrigeration / refrigeration equipment, lighting equipment, etc. in an air-conditioned space, improve the temperature environment in the air-conditioned space, and reduce the cost of the energy-saving system. Can be introduced.

FIG. 6 is an explanatory configuration diagram illustrating an example of a case where a part of an air conditioning unit is dehumidified at night in a store energy saving system according to the present invention to prevent ceiling dew condensation and leveling an air conditioning load. . It is an explanatory block diagram showing an example in the case where warm air near the ceiling of the store is used for air conditioning of the store during the heating operation of the air conditioning unit in the store energy saving system according to the present invention. It is an explanatory block diagram which shows the example in the case of using the cold air | gas which flows out from freezing / refrigeration equipment at the time of the heating operation of an air conditioning unit etc. in the energy saving system for stores concerning this invention for the air conditioning of a store. It is an explanatory block diagram which shows an example in the case of discharging | emitting the hot air which retains in the ceiling back of a store at the time of the air_conditioning | cooling operation of an air conditioning unit etc. in the energy saving system for stores concerning this invention. It is an explanatory block diagram which shows an example at the time of using a total heat exchanger for the air conditioning in a store in the energy saving system for stores concerning this invention. It is an explanatory block diagram which shows the example in the case of generating an air curtain in the windbreak room of a store at the time of the air_conditioning | cooling / heating operation of an air conditioning unit in the energy saving system for stores concerning this invention. It is a block diagram which shows the whole structure of the energy saving system for stores concerning this invention. It is a flowchart which shows the control procedure in the case of carrying out the dehumidification driving | operation of a part of air conditioning unit at night in the energy saving system for stores concerning this invention. It is a flowchart which shows the control procedure in the case of using the warm air near a store ceiling for the air conditioning of a store in the energy saving system for stores concerning this invention. It is a flowchart which shows the control procedure in the case of using the cold air | gas which flows out out of freezing / refrigeration equipment for the air conditioning of a store in the energy saving system for stores concerning this invention. It is a flowchart which shows the control procedure in the case of discharging | emitting the hot air which retains in the ceiling back of a store at the time of the cooling operation of an air conditioning unit in the energy saving system for stores concerning this invention. It is a flowchart which shows the control procedure in case an air curtain generate | occur | produces in the windbreak room of a store at the time of the cooling / heating operation of an air conditioning unit in the energy saving system for stores concerning this invention.

(Embodiment 1)
Hereinafter, an example when the energy saving system according to the present invention is implemented in a store will be described in detail with reference to FIGS. 1 to 7.
In FIG. 1, reference numeral 12 denotes a store on the first floor such as a food store such as a convenience store or a restaurant (corresponding to the air-conditioned space described in the claims), and is constructed on the ground GL. Further, the roof 14 of this type of store 12 often has a folded roof structure.
A plurality of air conditioning units 18 for air conditioning are provided on the ceiling 16 of the store 12 for each zone such as a windbreak system zone, an atrium zone in the store, and an outside zone in the store. These air conditioning units 18 are constituted by air-cooled or water-cooled heat pump package air conditioners that use electricity, oil and gas as fuel, the indoor units are arranged on the ceiling 16 of the store 12, and the outdoor units are stores. 12 near the ground GL and on the roof 14.

  Each air conditioning unit 18 is connected to an air conditioner (air conditioning) control panel 20 provided on the side wall in the store 12. The air conditioner control panel 20 performs various types of electrical control necessary for the air conditioning operation of the air conditioning unit 18, and the air conditioner control panel 20 includes the air conditioning units 18 in four seasons including summer and winter. A remote controller 202 that performs ON / OFF control and temperature setting is connected so that air conditioning can be performed individually or group by group. As shown in FIG. 7, the air conditioner control panel 20 is connected to the central control unit 62 via the output interface 64. Further, as shown in FIG. 7, each air conditioning unit 18 is configured to be supplied with electric power necessary for driving the air conditioning unit 18 from the AC power supply device 68 through the air conditioner control panel 20. Furthermore, an ammeter 201 for measuring a current flowing during operation of the air conditioning unit 18 is provided in a power supply line connecting the AC power supply device 68 and the air conditioner control panel 20. The current value measured by the ammeter 201 is input to the data collection unit 78, converted into electric energy, and configured to receive data from the terminal device 82.

The central control unit 62 has a function of controlling a part of the air conditioning units 18 so that the dehumidifying operation can be performed during the business hours of the store.
In order to perform the dehumidifying operation of the part of the air conditioning units 18, in the present embodiment, as shown in FIGS. 1 and 7, a first temperature / humidity sensor 22 that detects the temperature and humidity in the store 12, The schedule timer 70 is provided for setting and managing the business hours (for example, 10: 0 to 22:30) and the business suspension hours (for example, 22:30 to 10:00). The first temperature / humidity sensor 22 and the schedule timer 70 are connected to the central control unit 62 via the input interface 66.

The central control unit 62 includes a schedule timer 70 that sets the business hours of the store 12 (for example, 10: 0 to 22:30) and the business hours of the store (for example, 22:30 to 10:00). .
The central control unit determines whether the time of the schedule timer 70 is the business hours of the store 12 or the business suspension time zone, and when the time judgment means 6202 is judged to be a business suspension time zone. The humidity measurement value detected by the first temperature / humidity sensor 22 in a part of the air conditioning units 18 among the plurality of air conditioning units 18 for a predetermined time within the business suspension time period becomes a preset setting value. Dehumidifying operation control means 6204 for performing dehumidifying operation as described above.
It is necessary to provide a plurality of first temperature / humidity sensors 22 in order to accurately grasp the temperature / humidity situation in the store 12.

Next, the operation of the store energy-saving system shown in the first embodiment will be described with reference to FIGS.
First, a central monitoring panel (not shown) installed in the store 12 is started, and a fire detector (not shown) installed in the store 12 determines whether or not a fire has occurred in the store 12. (Step S11). Here, when the occurrence of a fire is detected, all the air conditioning units 18 are turned off (step S12). When it is determined that no fire has occurred, it is determined whether or not a collective alarm is to be generated for the entire air conditioning facility (step S13). Here, when it is determined that it is necessary to issue a collective alarm, a central monitoring board (not shown) is operated, and a buzzer built in the central monitoring board is sounded (step S14). Then, it returns to step S12 and makes the air conditioning unit 18 an OFF state.

On the other hand, when it is determined that it is not necessary to issue a collective alarm for the entire air conditioning facility, the system is started and an air conditioning unit operation command signal is output from the central control unit 62 to the air conditioner control panel 20 through the output interface 64. Thus, each air conditioning unit 18 is activated to start air conditioning in the store (step S15).
Next, in the time determination means 6202 of the central control unit 62, the time of the schedule timer 70 is the business hours of the store 12 (10: 0 to 22:30) or the business hours of the store 12 (22:30 to 10). : 00) or not (step S16). If it is determined that the time of the schedule timer 70 is in the business hours, the process proceeds to step S17, and the air conditioning temperature for each air conditioning unit 18 is set for each zone by operating the remote controller 202. In addition, when it is determined that the time of the schedule timer 70 is in the business suspension time zone, some of the air conditioning units 18a are automatically dehumidified by the dehumidifying operation control means 6204 of the central control unit 62.

Next, the dehumidifying operation control means 6204 compares and determines whether the measured humidity value detected by the first temperature / humidity sensor 22 is a set value (for example, 60% rh) or more (step S18). If it is determined that the measured humidity value is smaller than the set value, that is, the humidity in the store is smaller than 60% rh, the process proceeds to step S19, and the dehumidifying operation of some of the air conditioning units 18a is turned off. Moreover, when it determines with the humidity in a shop being 60% rh or more, it progresses to step S20 and controls some air conditioning units 18a to a dehumidification driving | running state.
Thereafter, the process proceeds to step S21, and the dehumidifying operation control means 6204 compares and determines whether the measured humidity value detected by the first temperature / humidity sensor 22 is equal to or less than a set value (for example, 55% rh). If the measured humidity value is equal to or lower than the set value, the process returns to step S19, and the dehumidifying operation of some of the air conditioning units 18a is turned off. If it is determined that the humidity in the store is greater than 60% rh, the process returns to step S16. Thereafter, the processing from step S16 to step S21 is performed for a predetermined period of the business suspension time period set by the schedule timer 70. Run repeatedly.

  According to the first embodiment as described above, in the business suspension time zone of the store 12, some of the air conditioning units 18a among the plurality of air conditioning units 18 are moved during a predetermined time within the business suspension time zone. The dehumidifying operation is performed so that the measured humidity value detected by the first temperature / humidity sensor 22 is set to a preset value. In the summer, it is possible to prevent condensation on the ceiling of the store and to control the air conditioning. The load can be leveled, and the power consumption peak can be cut. Furthermore, it is possible to reduce energy consumption used for store air conditioning, and to introduce an energy saving system at low cost.

(Embodiment 2)
Next, in the store energy-saving system, a configuration in the case where warm air staying in the vicinity of the store ceiling during heating operation of the air conditioning unit is used for air conditioning in the store will be described with reference to FIGS. 2 and 7. .
The store energy saving system shown in this embodiment includes a plurality of air conditioning units 18 configured in the same manner as shown in FIG. 1, and is connected to the central control unit and disposed on the ceiling 16 of the store 12. A plurality of warm air circulation fans 24 that circulate the warm air staying near the ceiling of the store 12 so as to blow down to the floor FL surface side of the store 12, a first temperature sensor 72 that detects the temperature near the floor surface of the store 12, There is provided a season changeover switch 95 for changing the season according to the middle of summer, winter or spring and autumn.

Each warm air circulation fan 24 is connected to a warm air circulation fan control panel 26 provided on the side wall in the store 12. The warm-air circulation fan control panel 26 performs various types of electrical control necessary for the warm-air circulation operation of the warm-air circulation fan 24, and is connected to the central control unit 62 via the output interface 64.
As shown in FIG. 7, each warm air circulation fan 24 is configured to be supplied with electric power necessary for driving the warm air circulation fan 24 from the AC power supply device 68 through the control panel 26 for the warm air circulation fan. The first temperature sensor 72 is connected to the central control unit 62 via the input interface 66. In addition, an ammeter 261 for measuring a current flowing during operation of each warm air circulation fan 24 is provided in a power supply line connecting the warm air circulation fan control panel 26 and the AC power supply device 68. The current value measured by the ammeter 261 is input to the data collection unit 78, converted into electric energy, and configured to receive data from the terminal device 82.
The season changeover switch 95 may be provided on the warm-air circulation fan control panel 26.

The central control unit 62 measures the temperature detected by the first temperature sensor 72 during the heating operation by the air conditioning unit 18 and the like, and a plurality of warm air circulation fans so that the measured value becomes a preset value. 24 has a warm-air circulation fan control means 6206 for driving and controlling 24.
In the case where a plurality of warm-air circulation fans 24 are controlled by being divided into zones such as a blow-off zone in the store and an outer zone in the store, it is necessary to provide a plurality of first temperature sensors 72.
Further, the zones shown in the second embodiment are divided into a windbreak system zone 1 (air curtain), an atrium zone 2 in the store, and an outer zone 3 in the store as shown in FIGS. 2 and 6, for example. It has been.
In the case of a windbreak system zone 1 (air curtain) to be described later, it is detected by a second temperature sensor 56 or an outside air temperature sensor (not shown) provided in the windbreak room 1202 near the ceiling for detecting the temperature of the windbreak room. The difference between the measured temperature and the temperature detected by the fourth temperature sensor 86 that detects the temperature in the store 14 is measured, and this measured value is controlled like the temperature in the ceiling that becomes a preset set value. This is different from the control in other zones.

Next, the operation of the store energy saving system shown in the second embodiment will be described with reference to FIG. 2, FIG. 7 and FIG.
First, a central monitoring panel (not shown) installed in the store 12 is started, and a fire detector (not shown) installed in the store 12 determines whether or not a fire has occurred in the store 12. (Step S31). Here, when the occurrence of a fire is detected, each warm air circulation fan 24 installed in the zones 2 and 3 is controlled to be turned off by the warm air circulation fan control means 6206 (step S32). When it is determined that no fire has occurred, the system is started and the warm air circulation fan control command signal is sent from the warm air circulation fan control means 6206 of the central control unit 62 to the warm air circulation fan control panel 26 through the output interface 64. Is output. Thereby, each warm air circulation fan 24 is driven (step S33).

Next, it is determined by the time determination means 6202 of the central control unit 62 whether or not the time of the schedule timer 70 is the business hours (10: 0 to 22:30) of the store 12 (step S34). If it is determined that the time of the schedule timer 70 is not in the business hours, the process returns to step S32, and the warm air circulation fan control means 6206 controls the warm air circulation fans 24 in the zones 2 and 3 to be off.
On the other hand, when it is determined that the time of the schedule timer 70 is in the business hours, it is determined whether the season changeover switch 95 is switched to summer, winter, or the middle period of spring and autumn. (Step S35). If it is determined that the season is summer and the season changeover switch 95 is switched to cooling, the process returns to step S32, and the warm-air circulation fans 24 in the zones 2 and 3 are turned off. If it is determined that the season is winter and the season switch 95 is switched to heating, the process proceeds to step S36, and the season is an intermediate period between spring and autumn, and the seasonal switch 95 is in the intermediate period. If it is determined that the switch has been made, the process proceeds to step S40.

The process shown in step S36 is performed by the warm air circulation fan control means 6206. That is, during the heating operation by the air conditioning unit 18, the temperature detected by the first temperature sensor 72 is measured, and it is compared and determined whether or not the measured value is equal to or less than the set value. In this case, the set value in zone 2 and zone 3 is 18 ° C. The described setting value is an example, and needs to be set in accordance with the operation status of the store.
If it is determined that the measured value is greater than the set value, the process returns to step S 32, and each warm air circulation fan 24 in the zones 2 and 3 is controlled to be off by the warm air circulation fan control means 6206. If it is determined that the measured value is equal to or smaller than the set value, the process proceeds to step S37, and each warm air circulation fan 24 in zones 2 and 3 is turned on by the warm air circulation fan control means 6206. Thereby, the warm air staying near the ceiling of the store 12 is blown down toward the floor FL of the store 12 by the warm air circulation fan 24, and the thermal environment near the floor of the store 12 is improved.

Next, the warm-air circulation fan control means 6206 again measures the temperature detected by the first temperature sensor 72, and compares and determines whether this measured value is equal to or greater than a set value (step S38). In this case, the set value in zone 2 and zone 3 is 20 ° C.
If it is determined that the measured value is greater than or equal to the set value, the process returns to step S 32, and each warm air circulation fan 24 in the zones 2 and 3 is turned off by the warm air circulation fan control means 6206. If it is determined in step S38 that the measured value is smaller than the set value, the process returns to step S34, and thereafter, the processing of steps S34 to S39 is repeatedly executed during the business hours set by the schedule timer 70.

If it is determined in step S35 that the season is in the intermediate period and the season changeover switch 95 has been switched to the intermediate period, the process proceeds to step S40, where the measured temperature value detected by the second temperature sensor 56 is 25 ° C. A comparison is made to determine whether Here, when it is determined that the measured value is greater than 25 ° C., the process returns to step S34, and the processes after step S34 are executed. If it is determined that the measured value is 25 ° C. or less, the process proceeds to step S 41, and each warm air circulation fan 24 in the zones 2 and 3 is turned on by the warm air circulation fan control means 6206. Thereafter, it is determined whether the temperature detected by the first temperature sensor 72 is equal to or higher than a set value (step S42). In this case, the set value in zones 2 and 3 is 22 ° C.
Here, when it is determined that the measured value is smaller than the set value, the process returns to step S34, and the processes after step S34 are executed. If it is determined in step S42 that the measured value is greater than or equal to the set value, the process proceeds to step S43, and each warm air circulation fan 24 in zones 2 and 3 is controlled to be turned off by the warm air circulation fan control means 6206. Then, it returns to step S34 and performs the process after step S34.

  According to the second embodiment, since the warm air staying near the ceiling of the store 12 is circulated by being blown down and circulated toward the floor FL of the store 12 by the warm air circulation fan 24 during the heating operation. The set temperature at the time of air conditioning during the heating operation can be kept low, and the thermal environment under the feet near the floor can be improved. Furthermore, the heating load in the store can be reduced, energy consumption used for air conditioning in the store can be reduced, and an energy saving system can be introduced at a low cost.

(Embodiment 3)
Next, referring to FIG. 3 and FIG. 7, in the energy saving system for the store, the structure in the case where the cold air flowing out from the refrigeration / refrigeration equipment is mainly used for air conditioning in the store during the cooling / heating operation of the air conditioning unit will be described. I will explain.
In the store energy-saving system shown in this embodiment, as shown in FIG. 3, a plurality of freezing and refrigeration showcases 28 that are freezing and refrigeration facilities are installed on the floor FL in the store 12. A plurality of cool air recovery fans 30 are installed in the ceiling 16 of the store 12. Each of the cold air collecting fans 30 sucks out the cold air flowing out from the freezing / refrigeration showcases 28 and staying on the floor FL of the store 12 through the ventilation duct 32 and blows it out into the ceiling 16 of the store 12. Further, a plurality of air outlets 34 are installed in the ceiling 16 to blow out the cold air blown into the ceiling 16 of the store 12 by the cold air collecting fans 30.
Further, a second temperature / humidity sensor 38 for detecting the temperature or humidity near the floor of the store 12 is provided. Further, the wind chamber 1202 is provided with a second temperature sensor 56 that detects the temperature near the ceiling. Furthermore, a plurality of third temperature sensors 46 that detect the temperature of the ceiling space at a plurality of locations are provided in the ceiling of the store 12. Further, a fourth temperature sensor 86 for detecting the temperature in the store 14 is provided. The temperatures detected by the second temperature sensor 56, the fourth temperature sensor 86, and the third temperature sensor 46 are configured to be taken into the central control unit 62.
The ceiling 16 has an airtight structure so that the cold air blown into the ceiling 16 from the cold air collecting fan 30 is efficiently blown into the store from the air outlet 34.

The ventilation duct 32 connects the space 36 between the lower surface of each refrigeration / refrigeration showcase 28 installed on the floor FL of the store 12 and the floor FL and the ceiling 16, and the ventilation duct 32. Is raised from the space 36 to the ceiling 16 along the side wall of the store 12, and a cold air recovery fan 30 is provided at the protruding end of the ventilation duct 32 into the ceiling 16.
Further, a temperature / humidity sensor 38 for detecting a temperature (or humidity) near the floor FL where the freezing / refrigeration showcase 28 is disposed is provided on the floor FL of the store 12.

Each of the cool air recovery fans 30 is connected to a cool air recovery fan control panel 40 provided on the side wall in the store 12. The cold air recovery fan control panel 40 performs various types of electrical control necessary for the operation of the cold air recovery fan 30, and is connected to the central control unit 62 via the output interface 64.
As shown in FIG. 7, each cold air recovery fan 30 is configured to be supplied with electric power necessary for driving the cold air recovery fan 30 from the AC power supply device 68 through the cold air recovery fan control panel 40. The second temperature / humidity sensor 38 is connected to the central control unit 62 via the input interface 66. In addition, an ammeter 401 that measures the current that flows during operation of the cool air recovery fan 30 is provided in the power supply line that connects the AC power supply device 68 and the cool air recovery fan control panel 40. The current value measured by the ammeter 201 is input to the data collection unit 78, converted into electric energy, and configured to receive data from the terminal device 82.

During the heating operation by the air conditioning unit 18, the central control unit 62 has a plurality of cold air recovery fans 30 so that the measured value of the temperature near the store floor detected by the second temperature and humidity sensor 38 becomes a preset set value. Has a cool air recovery fan control means 6208 for controlling the driving of the air. Similarly, during cooling operation by the air conditioning unit 18, the plurality of cold air recovery fans are driven and controlled so that the temperature in the ceiling detected by the third temperature sensor 46 becomes a preset value. The cold air recovery fan control means 6208 has a function of determining whether the season changeover switch 95 is switched to summer / winter or between spring and autumn.
The season changeover switch 95 may be provided on the cool air recovery fan control panel 40.

Next, the operation of the store energy-saving system shown in the third embodiment will be described with reference to FIGS.
First, a central monitoring panel (not shown) installed in the store 12 is started, and a fire detector (not shown) installed in the store 12 determines whether or not a fire has occurred in the store 12. (Step S51). Here, when the occurrence of a fire is detected, the cold air recovery fan 30 is controlled to be turned off by the cold air recovery fan control means 6208 (step S52). If it is determined that no fire has occurred, the system is started and the cold air recovery fan operation command signal is sent from the cold air recovery fan control means 6208 of the central control unit 62 to the cold air recovery fan control panel 40 through the output interface 64. Is output and each cold air recovery fan 30 is driven (step S53).

Next, it is determined by the time determination means 6202 of the central control unit 62 whether or not the time of the schedule timer 70 is in the business hours (10: 0 to 22:30) of the store 12 (step S54). Here, when it is determined that the time of the schedule timer 70 is not in the business hours, the process proceeds to step S52, and the cool air recovery fan control means 6208 controls the cool air recovery fan 30 to be turned off.
On the other hand, if it is determined that the time of the schedule timer 70 is in the business hours, it is determined whether the season changeover switch 95 is switched to summer, winter, or the middle period of spring and autumn. (Step S56). If it is determined that the season is summer or winter and the season changeover switch 95 is switched to summer or winter, the process proceeds to step S57. If it is determined that the season changeover switch 95 has been changed to the intermediate period, the process proceeds to step S61.

The processing shown in step S57 is performed by the cold air recovery fan control means 6208. That is, during the heating operation by the air conditioning unit 18, it is compared and determined whether the measured value of the temperature detected by the second temperature / humidity sensor 38 or the fourth temperature sensor 86 is equal to or less than the set value. Similarly, at the time of the cooling operation by the air conditioning unit 18, it is compared and determined whether the measured value of the temperature detected by the third temperature sensor 46 in the ceiling is equal to or more than the set value. In this case, the set value in winter is 16 ° C., and the set value in summer is 35 ° C.
Here, if it is determined that the measured value is equal to or less than the set value in the winter, or if it is determined that the measured value is equal to or greater than the set value in the summer, the process proceeds to step S58, and the cool air recovery fan 30 is received by the drive command signal from the cool air recovery fan control means 6208. Turn on the control. As a result, the cold air that flows out from each freezer / refrigerated showcase 28 and stays near the floor of the store 12 is sucked and blown into the ceiling 16 of the store 12. Further, the cold air blown into the ceiling 16 of the store by the cool air recovery fan 30 is blown into the store 12 from the outlet 34. This improves the thermal environment near the floor of the store 12. Further, when it is determined that the measured value is larger than the set value in the winter or when it is determined that the measured value is smaller than the set value in the summer, the process returns to step S54, and thereafter, during the business hours set by the schedule timer 70, the step The processes from S54 to S57 are repeatedly executed.

Next, the cool air recovery fan control means 6208 again determines whether the measured value of the temperature detected by the second temperature / humidity sensor 38 or the fourth temperature sensor 86 is equal to or higher than the set value in the winter, and sets it in the summer. It is compared and determined whether the value is equal to or less than the value (step S59). In this case, the set value in winter is 18 ° C., and the set value in summer is 33 ° C.
Here, if it is determined that the measured value is greater than or equal to the set value in winter, or if it is determined that the measured value is less than or equal to the set value in summer, the process proceeds to step S52, and the cold air recovery fan 30 is controlled to be turned off by the cold air recovery fan control means 6208. To do. If it is determined in step S59 that the measured value is smaller than the set value in winter, or if it is determined that the measured value is larger than the set value in summer, the process returns to step S54. During the business hours, the processing from step S54 to step S59 is repeatedly executed.

In the above step S56, when the season is the intermediate period, the process proceeds to step S61, and it is compared and determined whether the measured value of the temperature detected by the second temperature sensor 56 (outside air temperature sensor) is 25 ° C. or less. Here, when it is determined that the measured value is greater than 25 ° C., it is determined that it is in the summer, and the process returns to step S54 to execute the processing after step S54. If it is determined that the measured value is 25 ° C. or lower, the process proceeds to step S 62, and the cold air recovery fan 30 is turned on by the cold air recovery fan control means 6208. Thereafter, it is compared and determined whether the measured value of the temperature detected by the second temperature / humidity sensor 38 or the fourth temperature sensor 86 is equal to or greater than a set value (step S63). In this case, the set value in the intermediate period is 20 ° C.
If it is determined in step S63 that the measured value is smaller than the set value, the process returns to step S54, and the processes in and after step S54 are executed. If it is determined in step S63 that the measured value is greater than or equal to the set value, the process proceeds to step S64, and the cold air recovery fan control unit 6208 controls the cold air recovery fan 30 to be turned off. Then, it returns to step S54 and performs the process after step S54.

  According to the third embodiment, the temperature (and humidity) near the floor of the store 12 is measured during the heating operation, the temperature in the ceiling of the store 12 is measured during the cooling operation, and the wind The gradual room temperature, the temperature near the floor of the store 12 and the temperature in the store are measured, and the cold air recovery fan 30 is operated and controlled in accordance with the measured values. Since the cool air staying in the vicinity is sucked and blown into the ceiling 16 of the store 12, and further, the cool air blown into the ceiling 16 of the store by the cool air recovery fan 30 is blown out into the store 12 from the outlet 34. In addition, the heating environment in the vicinity of the floor can be improved during the heating operation in winter, etc., and the cooling load in the store can be reduced by preventing the inside of the ceiling from becoming hot in the summer, and the energy used for air conditioning in the store is reduced. Guests can reduce the energy, it is possible to introduce energy-saving system at low cost.

(Embodiment 4)
Next, in the energy-saving system for stores, when the air conditioning unit is in cooling operation, the air behind the store heated by radiant heat from solar radiation is discharged outside the store to improve the cooling effect of the store This will be described with reference to FIGS. 4 and 7. FIG.

In the store energy saving system shown in this embodiment, as shown in FIG. 4, a plurality of air supply fans 42 for sucking outside air through the outside air inlet 1602 are installed in the ceiling 16 on the north side of the store 12. ing. The outside air sucked by each air supply fan 42 is supplied to a ceiling space 1204 formed between the ceiling 16 and the roof 14 of the store 12. A plurality of exhaust fans 44 are provided in the ceiling 16 on the south side of the store 12 to discharge hot air in the ceiling space 1204 heated by radiant heat from solar radiation to the outside from the exhaust port 1208. The air supply fan 42 and the exhaust fan 44 are provided in a plurality of locations in the north ceiling of the store 12 and in the south ceiling of the store 12, and supply of the outside air to the ceiling space 1204 and exhaust from the ceiling space 1204 are simultaneously performed in a plurality of locations. Configured to be done.
In addition, a plurality of third temperature sensors 46 that detect the temperature in the ceiling space 1204 at a plurality of locations are provided in the ceiling space 1204. In FIG. 4, only one third temperature sensor 46 is shown.

Each of the air supply fans 42 and the exhaust fans 44 is connected to an exhaust heat fan control panel 48 provided on the side wall in the store 12. The exhaust heat fan control panel 48 incorporates operation switches, relays, electromagnetic contactors, and the like, and performs various types of electrical control necessary for the operation of the air supply fans 42 and the exhaust fans 44. To the central control unit 62.
As shown in FIG. 7, the air supply fans 42 and the exhaust fans 44 are supplied with electric power necessary for driving the air supply fans 42 and the exhaust fans 44 from the AC power supply device 68 through the exhaust heat fan control panel 48. It is comprised so that. The third temperature sensor 46 is connected to the central control unit 62 via the input interface 66. In addition, an ammeter 481 for measuring a current flowing when the air supply fan 42 and the exhaust fan 44 is operated is provided in a power supply line connecting the AC power supply device 68 and the exhaust heat fan control panel 48. The current value measured by the ammeter 481 is input to the data collecting unit 78, converted into electric energy, and configured to receive data from the terminal device 82.
The central control unit 62 drives and controls the air supply fans 42 and the exhaust fans 44 so that the measured value of the temperature detected by the third temperature sensor 46 becomes a preset set value during the cooling operation by the air conditioning unit. Exhaust heat fan control means 6210 is provided. The exhaust heat fan control means 6210 has a function of determining whether the season changeover switch 95 is switched to summer, winter, or the middle period of spring and autumn.
The season changeover switch 95 may be provided on the exhaust heat fan control panel 48.

Next, the operation of the store energy-saving system shown in the fourth embodiment will be described with reference to FIGS.
First, a central monitoring panel (not shown) installed in the store 12 is started, and a fire detector (not shown) installed in the store 12 determines whether or not a fire has occurred in the store 12. (Step S91). Here, when the occurrence of a fire is detected, all the air supply fans 42 and the exhaust fans 44 are controlled to be turned off (step S92). If it is determined that no fire has occurred, the process proceeds to step S93.
In step S93, the exhaust heat fan control means 6210 determines whether the season changeover switch 95 has been switched to summer, intermediate period, or winter. Here, when it is determined that the season is the intermediate period / winter and the season changeover switch 95 is switched to the intermediate period / winter, the process proceeds to step S92, and all the air supply fans 42 and the exhaust fans 44 are turned off. To control. If it is determined that the season changeover switch 95 has been switched to summer, the process proceeds to step S94.

In step S94, the time determination means 6202 of the central control unit 62 determines whether or not the time of the schedule timer 70 is within the business hours of the store 12 (10: 0 to 22:30). Here, when it is determined that the time of the schedule timer 70 is not in the business hours, the process returns to step S92, and all the supply fans 42 and the exhaust fans 44 are turned off by the exhaust heat fan control means 6210.
On the other hand, when it is determined that the time of the schedule timer 70 is in the business hours, the process shown in step S95 is executed by the exhaust heat fan control means 6210. That is, during the cooling operation by the air conditioning unit 18, an average value of the temperatures detected by the third temperature sensors 46 is obtained as a measured value, and whether or not the measured value is equal to or less than a set value is compared. The set value in this case is 38 ° C.

  If it is determined that the measured value is equal to or greater than the set value (38 ° C.), the process proceeds to step S96, and the first stage of the supply fan 42 and the exhaust fan 44 is turned on by a drive command signal from the exhaust heat fan control means 6210. Control. For example, if there are eight supply fans 42 and eight exhaust fans 44, four of the eight supply fans 42 and exhaust fans 44 are turned on, and the remaining four are turned off. . Thereby, the air behind the ceiling of the store heated by the radiant heat by the solar radiation through the roof 14 is discharged out of the store to improve the cooling effect of the store. If it is determined in step S95 that the measured value is smaller than the set value (38 ° C.), the process returns to step S94. Thereafter, the processing of step S94 and step S95 is repeated during the business hours set by the schedule timer 70. Execute.

  Next, in step S97, the exhaust heat fan control unit 6210 again determines whether or not the measured value that is the average value of the temperatures detected by the third temperature sensors 46 is equal to or less than the set value (36 ° C.). Here, if it is determined that the measured value is equal to or less than the set value (36 ° C.), the process proceeds to step S98, and the part of the supply fans 42 and the exhaust fans 44 that have been controlled to be in the ON state (four units each). The exhaust heat fan control means 6210 controls the off state. If it is determined in step S97 that the measured value is larger than the set value (36 ° C.), the process proceeds to step S99, and the measured value that is the average value of the temperatures detected by the second temperature sensors 46 is set again. A comparison is made to determine whether the value (42 ° C.) or higher.

  If it is determined in step S99 that the measured value is equal to or higher than the set value (42 ° C.), the process proceeds to step S100, and the second stage (four units each) is supplied by the drive command signal from the exhaust heat fan control means 6210. The fans 42 and the exhaust fans 44 are turned on to drive all the eight supply fans 42 and the exhaust fans 44. Thereby, the intake capacity of the outside air by the air supply fan 42 and the exhaust capacity of the exhaust fan 44 are improved, and the air cooling effect of the store is improved by eliminating the hot air behind the ceiling of the store heated by the radiant heat caused by solar radiation. If it is determined in step S99 that the measured value is smaller than the set value (42 ° C.), the process returns to step S96, and the processes in steps S96, S97, and S99 are repeated.

  Next, in step S101, the exhaust heat fan control unit 6210 again determines whether or not the measured value that is the average value of the temperatures detected by the third temperature sensors 46 is equal to or less than the set value (40 ° C.). If it is determined that the measured value is equal to or lower than the set value (40 ° C.), the process proceeds to step S102, and the second stage air supply fan 42 and exhaust fan 44 that have been controlled to be in the on state are connected to the exhaust heat fan control means. At 6210, the off state is controlled. In Step S101, when it is determined that the measured value is larger than the set value (40 ° C.), the process returns to Step S100, and the processes after Step S100 are executed.

  In the fourth embodiment, the air supply fan 42 and the exhaust fan 44 are disposed in the ceiling 16 of the store 12, and the air supply fan 42 and the exhaust fan 44 are exhausted according to the detected temperature in the ceiling. Since the driving control is performed by the heat fan control means 6210, the air in the ceiling of the store heated by the radiant heat caused by solar radiation can be discharged outside the store during the cooling operation in summer. Thereby, the temperature in the ceiling can be lowered, the cooling load in the store can be reduced, and an energy saving effect can be expected. Furthermore, since the air supply fan 42 and the exhaust fan 44 are automatically controlled while measuring the temperature in the ceiling, it can be operated with the minimum necessary energy.

(Embodiment 5)
Next, in the store energy saving system, a configuration when a total heat exchanger is used for air conditioning in the store will be described with reference to FIGS. 5 and 7.
In the store energy saving system shown in this embodiment, as shown in FIG. 5, there are a plurality of total heat exchangers 50 in the ceiling 16 of the store 12 for exchanging the humidity and sensible heat of the outside air and the store air at the same time. It is provided in the location.

The total heat exchanger 50 is connected to a total heat exchanger control panel 52 provided on the side wall in the store 12. The total heat exchanger control panel 52 performs various types of electrical control necessary for the operation of the total heat exchanger 50, and is connected to the central control unit 62 via the output interface 64.
As shown in FIG. 7, the total heat exchanger 50 is configured to be supplied with electric power necessary for driving the total heat exchanger 50 from the AC power supply device 68 through the total heat exchanger control panel 52.
In addition, an ammeter 521 for measuring a current flowing during operation of the total heat exchanger 50 is provided in a power supply line connecting the AC power supply device 68 and the total heat exchanger control panel 52. The current value measured by the ammeter 521 is input to the data collection unit 78, converted into electric energy, and configured to receive data from the terminal device 82.
The central control unit 62 includes a total heat exchanger control unit 6212 that drives and controls the total heat exchanger 50.

  In the fifth embodiment, the total heat exchanger 50 is activated when an operation command signal is input from the total heat exchanger control means 6212 to the total heat exchanger control panel 52 through the output interface 64. Accordingly, outside air sucked from the outside air inlet 5002 is supplied into the store 12 from the inlet 5004 through the total heat exchanger 50. The air in the store 12 is sucked from the suction port 5006 provided in the ceiling 16 in the store 12 and then discharged from the exhaust port 5008 to the outside of the store 12 through the total heat exchanger 50. At this time, since the humidity and sensible heat of the outside air and the store air are exchanged at the same time, the outside air taken in during the summer operation of the total heat exchanger 50 is cooled and dehumidified by the exhaust from the store, and the exhaust from the store is exhausted. Is heated and humidified. Moreover, since the outside air taken in during the winter operation of the total heat exchanger 50 is low temperature and low humidity, it acts oppositely to summer, and the taken outside air is heated and humidified. Thereby, the air-conditioning ventilation in a store is attained.

  According to the fifth embodiment, by installing the total heat exchanger 50, the cooling / heating load of the outside air can be reduced, and the energy saving effect can be improved. Thereby, the air conditioning unit 18 can be replaced with an air conditioning unit having a low air conditioning capability, and energy consumption can be reduced.

(Embodiment 6)
Next, in the store energy saving system, a configuration in the case where an air curtain is generated in the store windbreak room during the cooling / heating operation of the air conditioning unit will be described with reference to FIGS. 6 and 7.
The store energy saving system shown in this embodiment includes a plurality of air conditioning units 18 configured in the same manner as in the case shown in FIG. 1, and is provided on the ceiling of the wind removal chamber 1202 that is the wind removal system zone 1 of the store 12. A plurality of air curtain fans 54 that are arranged to form an air curtain at the entrance / exit of the wind vent chamber 1202, a second temperature sensor 56 that detects the temperature of the ceiling in the wind vent chamber 1202, and the temperature in the store 12 A fourth temperature sensor 86 is provided for detecting.

Each air curtain fan 54 is connected to an air curtain fan control panel 58 provided on the side wall in the store 12. The air curtain fan control panel 58 performs various types of electrical control necessary for the operation of the air curtain fan 54, and is connected to the central control unit 62 via the output interface 58.
As shown in FIG. 7, each air curtain fan 54 is configured to be supplied with electric power necessary for driving the air curtain fan 54 from the AC power supply device 68 through the air curtain fan control panel 58. . The second temperature sensor 56 and the fourth temperature sensor 86 are connected to the central control unit 62 via the input interface 66.

An ammeter 581 that measures the current that flows during operation of the air curtain fan 54 is provided in the power supply line that connects the AC power supply 68 and the air curtain fan control panel 58. The current value measured by the ammeter 581 is configured to be input to a total electric energy pulse transmission unit 92 described later.
The central control unit 62 measures the difference between the temperature detected by the third temperature sensor 56 and the temperature detected by the fourth temperature sensor 86 during the cooling / heating operation by the air conditioning unit 18, and this measured value is set in advance. The air curtain fan control means 6214 for driving and controlling the plurality of air curtain fans 54 so as to achieve the set value. The air curtain fan control means 6214 has a function of determining whether the season changeover switch 95 is switched to summer / winter or between spring and autumn.
The season changeover switch 95 may be provided on the air curtain fan control panel 58.

Next, the operation of the store energy saving system shown in the sixth embodiment will be described with reference to FIGS.
First, a central monitoring panel (not shown) installed in the store 12 is started, and a fire detector (not shown) installed in the store 12 determines whether or not a fire has occurred in the store 12. (Step S71). Here, when the occurrence of a fire is detected, the air curtain fan 54 installed in the zone 1 is controlled to be turned off by the air curtain fan control means 6214 (step S72). If it is determined that no fire has occurred, the process proceeds to step S73.
In step S73, the air curtain fan control means 6214 determines whether the season changeover switch 95 is switched to summer / winter or intermediate period. If it is determined that the season is summer / winter and the season selector switch 95 is switched to summer / winter, the process proceeds to step S74. On the other hand, if it is determined that the current period is an intermediate period, the process proceeds to step S78.

In step S74, the time determination unit 6202 of the central control unit 62 determines whether or not the time of the schedule timer 70 is within the business hours of the store 12 (10: 0 to 22:30). Here, when it is determined that the time of the schedule timer 70 is not in the business hours, the process proceeds to step S72, and the air curtain fan control means 6214 turns off the air curtain fan 54 in the zone 1. If it is determined that the time of the schedule timer 70 is in the business hours, the process proceeds to step S75, and the process shown in step S75 is executed.
That is, during the cooling / heating operation by the air conditioning unit 18, the difference between the temperature detected by the second temperature sensor 56 (outside air temperature sensor) of the windbreak chamber and the temperature detected by the fourth temperature sensor 86 is measured. A comparison is made to determine if the measured value is greater than or equal to the set value. In this case, the set value in zone 1 is 3 ° C.
Here, when it is determined that the measured value of the difference between the detected temperatures is smaller than the set value (3 ° C.), the process returns to step S74, and the processes after step S74 are executed. If it is determined that the measured value of the difference between the detected temperatures is equal to or greater than the set value (3 ° C.), the process proceeds to step S76, and the air curtain fan control means 6214 turns on the air curtain fan 54. As a result, the air curtain fan 54 is driven to form an air curtain at the entrance / exit of the wind vent chamber 1202.

Next, the air curtain fan control means 6214 again measures the difference between the temperature detected by the second temperature sensor 56 in the windbreak chamber and the temperature detected by the fourth temperature sensor 86, and if this measured value is less than the set value. Are compared (step S77). In this case, the set value in zone 1 is 1 ° C.
If it is determined that the measured value of the difference between the two detected temperatures is greater than the set value (1 ° C.), the process proceeds to step S76, and the processing from step S764 is repeated during the business hours set by the schedule timer 70. Execute. If it is determined that the measured value of the difference between the detected temperatures is equal to or less than the set value (1 ° C.), the process returns to step S72, and the air curtain fan control means 6214 turns off the air curtain fan 54 in the zone 1. As a result, the operation of the air curtain fan 54 is stopped.

If it is determined in step S73 that the season is an intermediate period, the process proceeds to step S78, and the following processing is executed by the time determination unit 6202 and the air curtain fan control unit 6214 of the central control unit 62.
That is, in step S78, it is determined by the time determination means 6202 whether or not the time of the schedule timer 70 is within the business hours of the store 12 (10: 0 to 22:30). Here, when it is determined that the time of the schedule timer 70 is not in the business hours, the process proceeds to step S72, and the air curtain fan control means 6214 turns off the air curtain fan 54 in the zone 1. If it is determined that the time of the schedule timer 70 is in the business hours, the process proceeds to step S79, and the process shown in step S79 is executed.

That is, in the intermediate period, the difference between the temperature detected by the second temperature sensor 56 and the temperature detected by the fourth temperature sensor 86 is measured, and it is compared and determined whether this measured value is equal to or greater than the set value. In this case, the set value in zone 1 is 5 ° C.
Here, when it is determined that the measured value of the difference between the detected temperatures is smaller than the set value (5 ° C.), the process proceeds to step S78, and the processes after step S78 are executed. If it is determined that the measured value is equal to or greater than the set value (5 ° C.), the process proceeds to step S80, and the air curtain fan control means 6214 turns on the air curtain fan 54. As a result, the air curtain fan 54 is driven to form an air curtain at the entrance / exit of the wind vent chamber 1202.

Next, the air curtain fan control means 6214 again measures the difference between the temperature detected by the second temperature sensor 56 in the windbreak chamber and the temperature detected by the fourth temperature sensor 86, and if this measured value is less than the set value. Are compared (step S81). In this case, the set value in zone 1 is 3 ° C.
If it is determined that the measured value of the difference between the detected temperatures is greater than the set value (3 ° C.), the process returns to step S80, and the processes after step S80 are repeated during the business hours set by the schedule timer 70. Execute. If it is determined that the measured value of the difference between the detected temperatures is equal to or less than the set value (3 ° C.), the process returns to step S72, and the air curtain fan control means 6214 controls the air curtain fan 54 in zone 1 to be turned off. As a result, the operation of the air curtain fan 54 is stopped.

  According to the sixth embodiment as described above, by generating an air curtain in the wind slow room of the store, the air conditioning load in the store during cooling and heating operation can be reduced, and the energy consumption used for the air conditioning of the store Energy saving system can be introduced at low cost.

In FIG. 7, the current supplied to the air conditioning unit 18, the warm air circulation fan 24, the cool air recovery fan 30, the air supply fan 42 and the exhaust fan 44, the total heat exchanger 50, the air curtain fan 54, the lighting equipment, etc. The ammeters 201, 261, 401, 481, 521, 581, and the like to be measured are connected to the data collection unit 78.
In the data collection unit 78, based on the current values measured by the ammeters 201, 261, 401, 481, 521, 581, the air conditioning unit 18, the warm air circulation fan 24, the cold air recovery fan 30, the air supply fan 42, The amount of power used in the exhaust fan 44, the total heat exchanger 50, and the lighting equipment is calculated. Further, the total power amount is transmitted to the demand device 90 and the data collection unit 78 by the total power amount pulse transmitter 92 connected to the power drawing line.

Measurement value data fetched by the central control unit 62 from the first temperature / humidity sensor 22, temperature / humidity sensor 38, first temperature sensor 72, second temperature sensor 56, third temperature sensor 46, and fourth temperature sensor 86 and supplied to the system A data collection unit 78 that collects data including the amount of electric power (the amount of kerosene and the like) is connected to the central control unit 62.
The data collected by the data collection unit 78 is transmitted and recorded through a communication line 84 such as a LAN or the Internet to a hub (HUB) 80 and a terminal device 82 such as a personal computer installed in a management center of the store 12. It is like that. In addition, the data recorded in the terminal device 82 is used as data for analyzing and evaluating the use state of energy such as electric energy and the temperature and humidity state of the store and for reducing running costs so that the energy saving system is optimally operated. .

In FIG. 7, the demand device 90 is for cutting the peak of power consumption used in the store and reducing the power cost, and the contract power of the store is the maximum demand power (past 1 year) Demand). Connected to the demand device 90 is a total power pulse transmitter 92 that measures the total power used in the store. The total power amount measured by the total power amount pulse transmitter 92 is taken into the demand device 90. Then, the total amount of power captured by the demand device 90 is compared with a preset setting value (contract power), and if it is predicted that the maximum power demand at the store will be greater than or equal to the set value, the demand device By stopping the electrical equipment connected to 90, the peak of the power consumption is cut. For example, in the embodiment shown in FIG. 7, some of the air conditioning units 18 and some of the refrigeration / refrigeration equipment 94 connected to the demand device 90 are controlled to be stopped.
In addition, a well-known thing can be utilized for such a demand apparatus. In addition, each air conditioning unit 18 and a part of the refrigeration / refrigeration equipment is connected to a demand device, receives a signal from the total electric power pulse transmitter, performs control based on a demand value, and collects data on used electric energy. Is going.

  As described above, by incorporating the demand device 90 into the store energy saving system, it is possible to cut the peak amount of power consumption used in the store, thereby keeping the total power consumption of the store within the contract power. it can.

The energy saving system of the present invention is not limited to the store described in the above embodiment, and can of course be used for air-conditioned spaces that require air conditioning such as office buildings and living spaces.
Moreover, in the said embodiment, although energy saving of the lighting installation installed in the store is not explained in detail, energy saving is performed also about the lighting installation. Specifically, lighting equipment consisting of fluorescent lamps, incandescent lamps, semiconductor light emitting elements, etc. is connected to a well-known power distribution control panel, and a command signal is input from the central control unit to this power distribution control panel, and the lighting equipment is supplied from the power supply device. Various lighting facilities are turned on and off by controlling the power supplied to. In particular, a schedule timer including a 24-hour timer is used for turning on and off various lighting facilities.

The central control unit 62 can be configured by a microcomputer.
In other words, the microcomputer includes a CPU, a ROM, a RAM, an interface, and the like connected via a bus line. The ROM stores a control program executed by the CPU, and the RAM provides a working area. When the CPU executes the control program, the time determination unit 6202, the dehumidifying operation control unit 6204, the warm air circulation fan control unit 6206, the cool air recovery fan control unit 6208, the exhaust heat fan control unit 6210, and the total heat exchanger control. Means 6212 and air curtain fan control means 6214 are realized.

  DESCRIPTION OF SYMBOLS 12 ... Store 1204 ... Ceiling space, 14 ... Roof, 16 ... Ceiling, 18 ... Air conditioning unit, 20 ... Air-conditioner control panel, 202 ... Remote control, 22 ... First temperature / humidity sensor, 24 ... Warm air circulation fan, 26 ... Power distribution board for warm air circulation fan, 28 ... Refrigeration / frozen showcase, 30 ... Cool air recovery fan, 32 ... Air duct, 34 ... Air outlet, 38 ... Second temperature / humidity sensor, 40 ... Power distribution board for cold air recovery fan, 42 ... Air supply Fan, 44 ... Exhaust fan, 46 ... Third temperature sensor, 40 ... Exhaust heat fan control panel, 50 ... Total heat exchanger, 5002 ... Outside air inlet, 5004 ... Air inlet, 5006 ... Inlet, 5008 ... Exhaust Mouth, 52 ... Total heat exchanger control panel, 54 ... Air curtain fan, 56 ... Second temperature sensor, 58 ... Air curtain fan control panel, 62 ... Central control unit, 6202 ... Time stamp Means 6204 ... dehumidifying operation control means 6206 ... warm air circulation fan control means 6208 ... cool air recovery fan control means 6210 ... exhaust heat fan control means 6212 ... total heat exchanger control means 6214 ... air curtain fan control means, 64 ... Output interface, 66 ... Input interface, 68 ... AC power supply, 70 ... Schedule timer, 72 ... First temperature sensor, 74 ... Second temperature sensor, 76 ... Wattmeter, 78 ... Data collection unit, 80 ... Hub, 82 ... Terminal device, 84 ... Communication line, 86 ... Fourth temperature sensor, 90 ... Demand device, 92 ... Total power pulse transmitter, 94 ... Refrigeration / refrigeration equipment, 95 ... Season switch.

Claims (10)

A central control unit;
A plurality of air conditioning units connected to the central control unit and arranged near the ceiling of the air-conditioned space to air-condition the air-conditioned space;
A first temperature and humidity sensor connected to the central control unit for detecting temperature and humidity in the air-conditioned space;
A schedule timer that is connected to the central control unit and sets a business time zone of the air-conditioned space and a business suspension time zone of the air-conditioned space;
The central control unit is configured to determine whether the time of the schedule timer is a business time zone or a business suspension time zone of the air-conditioned space, and when the time judgment unit is judged to be a business suspension time zone, Among the air conditioning units, a part of the air conditioning units is dehumidified so that the measured humidity value detected by the first temperature / humidity sensor becomes a preset value during a predetermined period of time during the business suspension period. Having dehumidifying operation control means to be operated,
Energy-saving system characterized by that. A plurality of warm air circulation fans that are connected to the central control unit and are arranged on the ceiling of the air-conditioned space and circulate so that the warm air staying near the ceiling of the air-conditioned space is blown down to the floor side of the air-conditioned space;
A first temperature sensor connected to the central control unit for detecting the temperature near the floor of the air-conditioned space;
A second temperature sensor connected to the central control unit for detecting the temperature of the windbreak chamber of the air-conditioned space;
The central control unit measures the temperature detected by the first temperature sensor mainly during heating operation by the air conditioning unit, and sets the plurality of warm-air circulation fans so that the measured value becomes a preset value. 2. The energy saving system according to claim 1, further comprising a warm air circulation fan control means for driving control. A plurality of cold air recovery fans connected to the central control unit and sucking out the cold air flowing out from the refrigeration / freezing equipment installed in the air-conditioned space and staying near the floor of the air-conditioned space, and blowing out into the ceiling of the air-conditioned space;
A second temperature and humidity sensor connected to the central control unit for detecting the temperature and humidity near the floor of the air-conditioned space;
A second temperature sensor connected to the central control unit for detecting the temperature of the windbreak chamber of the air-conditioned space;
A third temperature sensor connected to the central control unit for detecting the temperature in the ceiling space;
A fourth temperature sensor connected to the central control unit for detecting the temperature in the store;
The central control unit drives and controls the plurality of cold air recovery fans so that the measured value of the temperature detected by the second temperature and humidity sensor becomes a preset setting value during heating operation by the air conditioning unit, The plurality of cool air recovery fans are driven and controlled so that a measured value of the temperature detected by the third temperature sensor during the cooling operation by the air conditioning unit becomes a preset set value. 3. The cool air recovery fan control means for drivingly controlling the plurality of cool air recovery fans so that the measured value of the temperature in the store detected by the temperature sensor becomes a preset set value. The energy-saving system described. An air supply fan connected to the central control unit for supplying outside air to the ceiling space formed between the ceiling and the roof of the air-conditioned space;
An exhaust fan connected to the central control unit and exhausting hot air in the ceiling space to the outside;
A third temperature sensor connected to the central control unit and detecting a temperature in the ceiling space;
The central control unit drives and controls the air supply fan and the exhaust fan so that a measured value of the temperature detected by the third temperature sensor becomes a preset value during cooling operation by the air conditioning unit. The energy saving system according to claim 1, further comprising an exhaust heat fan control unit configured to perform the operation. A total heat exchanger connected to the central control unit and provided in the ceiling of the air-conditioned space, further comprising a total heat exchanger for exchanging heat and sensible heat simultaneously between the outside air and the air in the air-conditioned space,
5. The energy saving system according to claim 1, wherein the central control unit includes a total heat exchanger control unit that drives and controls the total heat exchanger. 6.   The energy-saving system according to claim 3, wherein a plurality of air outlets for blowing the cold air blown into the ceiling of the air-conditioned space by the cold air collecting fan are installed in the ceiling.   The energy saving system according to claim 3, wherein a ventilation duct is provided to guide the cold air flowing out from the refrigeration / refrigeration facility into the ceiling, and the cold air recovery fan is provided at a protruding end of the ventilation duct into the ceiling. .   A data collection unit that collects data including the measurement value captured by the central control unit and the amount of power used by the entire system; and a terminal device that records the data collected by the data collection unit. The energy saving system according to any one of claims 1 to 7, wherein A plurality of air curtain fans connected to the central control unit and disposed on the ceiling of the wind chamber of the air-conditioned space to form an air curtain at the entrance and exit of the wind chamber, and the temperature of the ceiling in the wind chamber is detected And a third temperature sensor
The central control unit measures the difference between the temperature detected by the third temperature sensor during the cooling / heating operation by the air conditioning unit and the in-store temperature detected by the fourth temperature sensor, and this measured value is preset. 9. The energy saving system according to claim 1, further comprising air curtain fan control means for driving and controlling the air curtain fan so as to obtain a set value.   Demand devices that cut power consumption peaks and reduce power costs, and are used for electrical equipment such as air conditioning units, warm air circulation fans, cold air recovery fans, air supply fans and exhaust fans, and total heat exchangers. A data collection unit for collecting power amount data obtained by converting a current value into a pulse number and a total power amount pulse transmission unit connected to a power pull-in line are provided, and the demand device includes the total power amount pulse transmission unit. Is connected to the demand device when the total sum of each power amount transmitted from the device is compared with a preset set value (contract power) and the sum of the power amount data is predicted to be greater than or equal to the set value. The energy saving system according to claim 1, wherein a part of the electric device is stopped.

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