JP2013011423A - Refrigerating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a supercooling efficiency of a subcooler during a time period of peak power generation to increase an operational efficiency of a first refrigeration cycle circuit.SOLUTION: A refrigerating apparatus R supercools a refrigerant of the first refrigeration cycle circuit 10 by an evaporation action of a refrigerant of a second refrigeration cycle circuit 20 in the subcooler 13 of a supercooling water heater 4, and also heats water by a heat radiation action from a second radiator 22 to supply hot water. In the refrigerating apparatus, an integrated controller C1 implements the control of flowing a refrigerant to a third radiator 25 during a time period other than peak power generation time periods where power consumption exceeds a predetermined value, when an excessive supply of hot water is predicted based on a relationship between a supplied amount of hot water and a consumed amount of hot water.

Description

  The present invention heats hot water supply by heat radiation from a first refrigeration cycle circuit, a second refrigeration cycle circuit that supercools the refrigerant in the first refrigeration cycle circuit, and a radiator of the second refrigeration cycle circuit. The present invention relates to a refrigeration apparatus that supplies hot water.

  Conventionally, in large stores and convenience stores, the refrigerant of the first refrigeration cycle circuit is used to effectively utilize the cooling exhaust heat from the first refrigeration cycle circuit constituting the air conditioner that performs low-temperature showcases and in-store air conditioning. A refrigeration apparatus has been developed that heats hot water used in a store by providing a second refrigeration cycle circuit that supercools the second refrigeration cycle circuit and dissipating heat from the radiator of the second refrigeration cycle circuit (for example, Patent Document 1).

  In this case, the first compressor, the first radiator, the supercooler, the first pressure reducer, and the evaporator are sequentially connected to form a first refrigeration cycle circuit. Cool the inside of the showcase and the store. The refrigeration capacity of the first refrigeration cycle circuit can be improved by reducing the temperature of the refrigerant radiated by the first radiator. Usually, in a refrigeration cycle circuit in which no supercooler is provided, the temperature of the refrigerant radiated to the atmosphere by the first radiator is the lower limit of the ambient temperature at which the radiator is provided.

  On the other hand, the second compressor, the second radiator, the second pressure reducer, and the supercooler are sequentially connected to form a second refrigeration cycle circuit. In the supercooler, the first refrigeration The refrigerant temperature in the first refrigeration cycle circuit is exchanged by heat exchange between the refrigerant that has passed through the first radiator of the cycle circuit and the refrigerant that has been depressurized in the second decompressor of the second refrigeration cycle circuit. Can be greatly reduced. As a result, the refrigeration capacity of the first refrigeration cycle circuit can be dramatically increased.

  Then, in the second radiator of the second refrigeration cycle circuit, the hot water is heated using waste heat by exchanging heat between the refrigerant in the second refrigeration cycle circuit and the hot water. Heating of the hot water supply is performed according to the consumption of hot water. When heating of the hot water supply is not necessary, the heat dissipation efficiency of the refrigerant in the second radiator of the second refrigeration cycle circuit is increased. In consideration of this, a heat radiating process has been performed by providing a third heat radiator for releasing the heat of the refrigerant in the second refrigeration cycle circuit to the atmosphere.

JP 2010-276230 A

  By the way, the subcooling efficiency of the refrigerant in the first refrigeration cycle circuit by the subcooler of the second refrigeration cycle circuit is the case where the second radiator is heat-exchanged with the low temperature hot water supplied from the hot water storage tank. Is significantly larger than when released into the atmosphere. However, in the conventional refrigeration apparatus as described above, whether the heat of the refrigerant in the second refrigeration cycle circuit is used for hot water supply in the second radiator by determining whether the hot water supply needs to be heated or not is determined. In the third radiator, it was discarded to the atmosphere.

  For this reason, when there is no hot water supply request in a time zone (peak power generation time zone) in which the power consumption integrated value of the entire facility is large within one day, heat exchange between hot water and refrigerant in the second radiator Cannot be carried out, and there is a problem that an efficient supercooling operation cannot be realized. In particular, in summer, when there is no hot water supply request during the daytime when the power consumption integrated value is large during the day, the high temperature outside air and the refrigerant in the second refrigeration cycle circuit are heat-exchanged. There was a problem that the efficient supercooling effect in the cooler could not be improved.

  The present invention has been made to solve the conventional technical problems, and improves the operation efficiency of the first refrigeration cycle circuit by improving the subcooling efficiency of the subcooler in the peak power generation time zone. The present invention provides a refrigeration apparatus capable of achieving the above.

  The refrigeration apparatus of the present invention includes a first refrigeration cycle circuit formed by sequentially connecting a first compressor, a first radiator, a supercooler, a first pressure reducer, and an evaporator, and a second compression. A second refrigeration cycle circuit comprising a pipe, a second radiator, a second pressure reducer, and a supercooler sequentially connected to each other, and in the subcooler, the refrigerant evaporates in the second refrigeration cycle circuit. The refrigerant of the first refrigeration cycle circuit is supercooled and heated by the heat radiation from the second radiator to supply hot water, and the heat of the refrigerant of the second refrigeration cycle circuit is transferred to the atmosphere. A third heat radiator for discharging, flow path switching means for controlling whether the refrigerant discharged from the second compressor flows to the second heat radiator or the third heat radiator, and the flow Control means for controlling the path switching means, and the control means is configured to provide the second heat dissipation by the flow path switching means. When the hot water supply is predicted to be excessive due to the relationship between the amount of hot water and the consumption of hot water, the flow of the refrigerant to the time zone other than the peak power generation time when the power consumption exceeds the predetermined value Control that causes the refrigerant to flow through the third radiator is performed by the path switching means.

  According to a second aspect of the present invention, in the above invention, the refrigerator unit that houses the first compressor and the first radiator, the showcase that houses the first decompressor and the evaporator, and the second compressor A second radiator, a third radiator, a second depressurizer, and a supercooling water heater housing the supercooler, and a second radiator of the supercooling water heater connected to the second radiator via a water pipe. And a hot water storage device having a hot water storage tank.

  According to a third aspect of the present invention, in the above invention, the control means operates the second compressor of the supercooling water heater in conjunction with the first compressor of the refrigerator unit, and responds to a hot water supply request in the hot water storage device. The refrigerant is caused to flow through the second radiator by the flow path switching means.

  According to a fourth aspect of the present invention, in the above invention, the control means determines the consumption of hot water in the hot water storage tank, the amount of hot water supplied by the supercooling water heater, and the power consumption of the entire apparatus, the time zone and the environmental conditions at that time. Measurement value database constructed by classifying and storing each, and based on the measurement value database, consumption of hot water in the hot water storage tank in the subsequent predetermined period, amount of hot water supplied by the supercooled water heater, and peak power generation A prediction unit that predicts a time zone, a determination unit that determines the presence or absence of a time zone in which hot water supply is excessive from the hot water supply amount and hot water consumption predicted by the prediction unit, and a control unit that controls the flow path switching unit And when the determination unit determines that there is a time zone in which the hot water supply is excessive, the control unit uses the flow path switching unit in the time zone in which the power consumption is minimized. It is characterized by flowing refrigerant through the radiator .

  The invention of claim 5 is characterized in that, in the above invention, the prediction unit predicts the amount of hot water supply, the amount of hot water consumption, and the peak power generation time zone from the environmental conditions in a predetermined period based on JMA data.

  The invention of claim 6 is characterized in that, in each of the above inventions, the refrigerant sealed in the second refrigeration cycle circuit is carbon dioxide, and the second radiator acts as a gas cooler.

  According to the present invention, the first compressor, the first radiator, the supercooler, the first decompressor, and the evaporator are sequentially connected by piping, and the second compressor. A second refrigeration cycle circuit in which a second radiator, a second decompressor and a supercooler are sequentially connected to each other by piping, and in the subcooler, the second refrigeration cycle circuit evaporates by the refrigerant evaporating action. In the refrigeration system that heats hot water by heating the hot water by the heat radiation action from the second radiator and releases the heat of the refrigerant in the second refrigeration cycle circuit to the atmosphere. And a flow path switching means for controlling whether the refrigerant discharged from the second compressor flows to the second radiator or the third radiator, and the flow path switching Control means for controlling the means, and the control means is configured to provide the second heat dissipation by the flow path switching means. When the hot water supply is predicted to be excessive due to the relationship between the amount of hot water and the consumption of hot water, the flow of the refrigerant to the time zone other than the peak power generation time when the power consumption exceeds the predetermined value By controlling the flow of the refrigerant to the third radiator by means of the path switching means, it is possible to avoid heat radiation to the atmosphere by the third radiator during the peak power generation time period, and to dissipate hot water by the heat radiation action in the second radiator. Water can be heated. Thereby, the supercooling efficiency of the supercooler in the peak power generation time zone can be increased, and the operating efficiency of the first refrigeration cycle circuit can be improved.

  According to invention of Claim 2, in the said invention, the refrigerator unit which accommodates the 1st compressor and the 1st radiator, the showcase which accommodates the 1st decompressor and the evaporator, 2nd A compressor, a second radiator, a third radiator, a second decompressor, and a supercooling water heater that houses a supercooler, and a second radiator of the supercooling water heater via a water pipe By comprising a hot water storage device having a connected hot water storage tank, by combining the required number of each component device, it is suitable for cooling load and hot water supply load, has excellent cooling performance, and performs hot water supply using cooling exhaust heat Can be easily constructed.

  In addition, a high-efficiency refrigeration apparatus capable of reducing energy consumption can be easily constructed using an existing refrigeration apparatus. In other words, by installing an additional supercooling water heater and hot water storage device in the existing showcase and refrigerator unit, it is possible to improve the refrigeration capacity and refrigeration efficiency of the existing equipment, and to use hot water that effectively utilizes the cooling exhaust heat. It becomes.

  According to the invention of claim 3, in the above invention, the control means operates the second compressor of the supercooling hot water heater in conjunction with the first compressor of the refrigerator unit, and hot water supply in the hot water storage device. By operating the supercooling water heater in accordance with the operating status of the first refrigeration cycle circuit by flowing the refrigerant to the second radiator by the flow path switching unit as required, the operating efficiency of the entire apparatus is reduced. In addition to avoiding the inconvenience, it is possible to achieve efficient hot water supply by flowing the refrigerant into the second radiator in response to the hot water supply request of the hot water storage device. The present invention is particularly effective in such a refrigeration apparatus.

  According to the invention of claim 4, in the above invention, the control means includes the consumption of hot water in the hot water storage tank, the amount of hot water supplied by the supercooling water heater, and the amount of power consumption of the entire apparatus, and the time zone at that time A measured value database constructed by classifying and storing for each environmental condition, and based on the measured value database, consumption of hot water in a hot water storage tank in a subsequent predetermined period, amount of hot water supplied by a supercooled water heater, and peak A control unit that predicts a power generation time zone, a determination unit that determines the presence or absence of a hot water supply excess time from the hot water supply amount and hot water consumption predicted by the prediction unit, and a control that controls the flow path switching unit And when the determination unit determines that there is a time zone in which the hot water supply is excessive, the control unit uses the flow path switching means in the time zone in which the power consumption is minimized. 3 by flowing the refrigerant through the radiator In the peak power generation time zone, it is possible to perform refrigerant inflow to the second radiator according to the hot water supply request, and to cool the refrigerant in the second refrigeration cycle circuit with high heat exchange efficiency. Thereby, the supercooling efficiency of the 1st freezing cycle circuit in a supercooler can be improved. Therefore, the operation efficiency of the entire apparatus during the peak power generation time period can be increased, and the power consumption can be suppressed.

  Moreover, leveling of the power consumption can be achieved by performing the time zone in which the refrigerant flows through the third radiator in the time zone in which the power consumption is minimized. Thereby, the excessive load in the time zone with much power consumption can be eliminated.

  According to the invention of claim 5, in the above invention, the prediction unit predicts the amount of hot water supply, the consumption of hot water and the peak power generation time zone from the environmental conditions in a predetermined period based on the Meteorological Agency data. Prediction of hot water supply amount, hot water consumption, and peak power generation time zone based on the forecast can be realized.

  According to the invention of claim 6, in each of the above inventions, the refrigerant enclosed in the second refrigeration cycle circuit is carbon dioxide, and the second radiator acts as a gas cooler, thereby increasing the temperature of hot water. Can be boiled with efficiency.

It is a figure explaining the piping structure of the freezing apparatus to which this invention is applied. It is a control block diagram of the freezing apparatus of FIG. It is a figure explaining the database of the controller of the refrigerating device of the present invention. It is a timing chart explaining hot water supply and heat dissipation control scheduling. It is a flowchart explaining the hot water supply / heat radiation control scheduling operation. It is a flowchart explaining the hot water supply / heat radiation control scheduling operation.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a refrigerant circuit diagram of a refrigeration apparatus R to which the present invention is applied, and FIG. 2 is a control block diagram of the refrigeration apparatus R. The refrigeration apparatus R of the present embodiment is installed in a facility equipped with both a cooling facility and a hot water supply facility, such as a store in a supermarket or a convenience store, and cools each showcase 2 installed in the store. The first refrigeration cycle circuit 10, the second refrigeration cycle circuit 20 for improving the refrigeration capacity of the first refrigeration cycle circuit 10 by supercooling the refrigerant of the first refrigeration cycle circuit 10, And a hot water supply circuit 30 that heats hot water using exhaust heat from the two refrigeration cycle circuits 20.

  The first refrigeration cycle circuit 10 is configured by sequentially connecting a first compressor 11, a first radiator 12, a supercooler 13, an expansion valve 14 as a first pressure reducer, and an evaporator 15 by piping. ing. In the present embodiment, a plurality of showcases 2... For housing the expansion valve 14 and the evaporator 15 are provided, and the first side of the evaporator 15 of each showcase 2 is provided with a first through an electromagnetic valve 14. The refrigerant refrigerant pipe 16 of one refrigeration cycle circuit 10 is connected in parallel, and the outlet side of the evaporator 15 is connected in parallel to the gas refrigerant pipe 17 of the first refrigeration cycle circuit 10.

  Each showcase 2 is provided with a showcase controller C2 composed of a general-purpose microcomputer. The controller C2 detects the refrigerant temperature at the outlet side of the expansion valve 14 and the evaporator 15. An evaporator outlet refrigerant temperature sensor 41 and an evaporator inlet refrigerant temperature sensor 42 for detecting the refrigerant temperature on the inlet side of the evaporator 15 are connected.

  On the other hand, the first compressor 11 and the first radiator 12 of the first refrigeration cycle circuit 10 are housed together with a radiator fan (not shown) to constitute the refrigerator unit 3. The refrigerator unit 3 is installed outside the store, such as outside the store where the refrigerator R is installed. The refrigerator unit 3 is also provided with a refrigerator controller C3 configured by a general-purpose microcomputer.

  The refrigerator controller C3 is connected to the first compressor 11 and the first radiator fan. Further, the refrigerator controller C3 detects the first radiator outlet temperature sensor 40 for detecting the outlet refrigerant temperature of the first radiator 12 and the low-pressure side pressure of the first refrigeration cycle circuit 10. A low-pressure sensor 43 and an outside temperature sensor 44 that detects the outside temperature are connected.

  The subcooler 13 is a heat exchanger for further cooling the refrigerant of the first refrigeration cycle circuit 10 cooled by radiating heat to the atmosphere with the first radiator 12. The subcooler 5 includes a first refrigeration cycle circuit side flow path (first flow path) 13a and a second refrigeration cycle circuit side flow path (second flow path) 13b, and flows through the flow path. The refrigerant is configured to be able to exchange heat. Each flow path 13a and 13b is comprised so that the direction through which a refrigerant | coolant flows may oppose, and can aim at the improvement of heat exchange efficiency.

  The first refrigeration cycle circuit 10 employs R404A as a refrigerant, but other refrigerants such as fluorocarbon refrigerants such as R407C and R134a, carbon dioxide (R744), ammonia (R717), and the like. Natural refrigerants may be employed.

  On the other hand, the second refrigeration cycle circuit 20 is configured by sequentially connecting a second compressor 21, a second radiator 22, an expansion valve 23 as a second decompressor, and the supercooler 13 sequentially. Has been. A third radiator 25 is connected to the discharge refrigerant pipe 24 of the second compressor 21 in parallel with the second radiator 23, and a hot water supply side is connected to the refrigerant inflow side of the second radiator 23. An electromagnetic valve 26 is provided, and a heat radiation side electromagnetic valve 27 is provided on the refrigerant inflow side of the third radiator 25. The hot water supply side electromagnetic valve 26 and the heat radiation side electromagnetic valve 27 are flow paths that control whether the refrigerant discharged from the second compressor 21 flows through the second heat radiator 22 or the third heat radiator 25. The switching means is configured.

  And the 2nd compressor 21 of the 2nd refrigerating cycle circuit 20, the 2nd radiator 22, the 3rd radiator 25, each electromagnetic valve 26 and 27, expansion valve 23, and subcooler 13 is housed together with a blower for a third radiator (not shown) and constitutes a supercooled water heater 4.

  The second radiator 22 is a heat exchanger for exchanging heat between the refrigerant flowing through the second refrigeration cycle circuit 20 and the water flowing through the hot water supply circuit 30, and heating the hot water to boil the hot water. is there. The second radiator 22 includes a refrigerant flow path 22a and a water flow path 22b, and is configured so that heat can be exchanged between the refrigerant flowing through the flow path and water. Each flow path 22a, 22b is comprised so that the flow direction may oppose, and, thereby, heat exchange efficiency improves.

  Here, in the present embodiment, carbon dioxide is enclosed in the second refrigeration cycle circuit 20 as a refrigerant. In the refrigeration cycle using the carbon dioxide refrigerant, since the high pressure side is a transcritical cycle in which the critical pressure of the refrigerant is exceeded, the refrigerant pressure flowing through the refrigerant flow path 22a of the second radiator 22 exceeds the critical pressure. The radiator 22 functions as a gas cooler. Thereby, the refrigerant flowing through the refrigerant flow path 22a of the second radiator 22 does not condense, and the temperature decreases as the water flowing opposite the water flow path 22b is heated and cooled. Therefore, the water flowing through the water flow path 22b can be heated to a high temperature and with high efficiency.

  The third radiator 25 is a heat exchanger for releasing the heat of the high-temperature and high-pressure refrigerant discharged from the second compressor 21 of the second refrigeration cycle circuit 20 to the atmosphere.

  The supercooling water heater 4 is also provided with a supercooling water heater controller C4 configured by a general-purpose microcomputer. The supercooling water heater controller C4 is connected to the second compressor 21, the expansion valve 23, the hot water supply side electromagnetic valve 26, the heat radiation side electromagnetic valve 27, and the second radiator fan. The supercooling water heater controller C4 includes a refrigerant discharge temperature sensor 45 for detecting the temperature of the refrigerant discharged from the second compressor 21, and a first refrigeration cycle circuit side flow path of the supercooler 13. A supercooling temperature sensor 46 for detecting the refrigerant temperature on the outlet side of 13a and a hot water temperature sensor 47 for detecting the hot water temperature on the outlet side of the water flow path 22b of the second radiator 22 are connected.

  Next, the hot water supply circuit 30 is configured by sequentially connecting a hot water storage tank 31, a circulation pump 35, and a water flow path 22 b of the second radiator 22 in an annular manner by a water pipe 32. The hot water storage tank 31 and the circulation pump 35 constitute a hot water storage device 5.

  The water pipe 32a connected to the lower side of the hot water storage tank 31 is connected to the suction side of the circulation pump 35, and low temperature water in the hot water storage tank 31 can be supplied to the second radiator 22 via the pump. It is said that. A water pipe 32 b connected to the outlet side of the water flow path 22 b of the second radiator 22 is connected to the upper part of the hot water storage tank 31. As a result, the hot water heated by the second radiator 22 is returned to the upper part of the hot water storage tank 31, whereby hot water can be stored on the temperature stratification inside the hot water storage tank 31.

  A hot water supply pipe 33 provided with a hot water supply valve (not shown) is connected to the upper part of the hot water storage tank 31, and a water supply pipe 34 is connected to the lower part of the hot water storage tank 31. The hot water supply pipe 33 is a pipe for supplying hot water from the hot water supply tank 31 to a hot water supply load facility in the same facility such as a store where the refrigeration apparatus R is installed. The water supply pipe 34 is for supplying city water to the hot water storage tank 31. Thus, when the hot water supply valve is opened in the hot water supply load facility, hot water is supplied from the upper part of the hot water storage tank 31 through the hot water supply pipe 33, and accordingly, hot water is supplied through the hot water supply pipe 34. Cold water is supplied to the lower part of.

  The hot water supply apparatus 5 is also provided with a hot water supply controller C5 configured by a general-purpose microcomputer. The hot water supply controller C5 includes a circulation pump 35, a hot water consumption flow sensor 48 that measures the amount of hot water sent from the hot water supply pipe 33 to the hot water supply load facility, that is, a consumption amount of hot water, and a second radiator 22. A hot water flow rate sensor 49 is connected to measure the amount of hot water flowing into the hot water storage tank 31 from the water pipe 32b through the water flow path 22b, that is, the amount of hot water. The hot water supply controller C5 is provided with a hot water amount sensor 50 for detecting the amount of hot water in the hot water storage tank 31. The hot water sensor 50 is composed of a plurality of temperature sensors provided on the outer surface of the hot water storage tank 31 at different heights. The temperature distribution in the hot water storage tank 31 can be measured from the temperature detected by each temperature sensor, and the amount of hot water in the hot water storage tank 31 can be grasped based on the temperature distribution.

  Next, a control system for the refrigeration apparatus R in the present embodiment will be described. The control system (control means) includes controllers C3 to C5 (and C2) provided in each of the refrigerator unit 3, the supercooling water heater 4, the water heater 5 (and each showcase 2), and the integrated controller C1. Composed. The integrated controller C1 is configured by a general-purpose microcomputer having a memory in which a measurement value database 55 described later is constructed, a prediction unit 56, a determination unit 57, a control unit 53 that performs various controls, and a timer 52. . The integrated controller C1 is installed, for example, in a management room such as a store where the refrigeration apparatus R is installed, receives operation state data such as temperature information from the controllers C2 to C5, and sends commands such as set values. Transmit to the controllers C2 to C5. The integrated controller C1 is connected to the server apparatus via a communication line such as a LAN (Local Area Network). The server device is capable of receiving environmental condition information such as the outside air temperature during a predetermined period thereafter, such as JMA data, via a communication line. In addition, a power meter 58 for detecting the power consumption of the entire refrigeration apparatus R is connected to the integrated controller C1.

  The basic operation of the refrigeration apparatus R in the present embodiment will be described below. First, the refrigerator controller C3 is instructed by the integrated controller C1, and when the pressure detected by the low pressure side pressure sensor 43 becomes equal to or higher than the set value based on the set low pressure set value, the first compressor 11 is set. When the operation is stopped and becomes less than a predetermined value, ON-OFF control of the compressor that starts the compressor 11 is performed (in this case, a predetermined hysteresis is provided).

  Thus, when the first compressor 11 is operated in the first refrigeration cycle circuit 10, the high-temperature refrigerant discharged from the first compressor 11 flows into the first radiator 12, and the atmosphere It is cooled by exchanging heat with it. The refrigerant air-cooled by the first radiator 12 flows into the first flow path 13a of the supercooler 13, where the refrigerant evaporates in the second refrigeration cycle circuit 20 flowing through the second flow path 13b. It is supercooled by. Thereby, the supercooling degree of the refrigerant | coolant by the side of the 1st freezing cycle circuit 10, ie, the inlet-outlet temperature difference of the subcooler 13a, can be enlarged. As described above, the specific enthalpy of the refrigerant is further reduced, so that the refrigeration effect is increased as compared with the case where the refrigerant is not supercooled by the supercooler 13.

  The high-pressure and low-temperature liquid refrigerant that has flowed out of the subcooler 13 flows into the showcases 2 via the liquid refrigerant pipes 16, and is decompressed by the expansion valves 14, and then flows into the evaporator 15 to be cooled. Demonstrate the effect. At this time, the showcase controller C2 expands so that a difference (superheat degree) between the outlet side refrigerant temperature and the inlet side refrigerant temperature of the evaporator 15 detected by the temperature sensors 41 and 42 becomes a predetermined value. The opening degree of the valve 14 is controlled. Thereby, the interior of the showcase 2 is cooled to a predetermined temperature.

  The refrigerant that has flowed out of the evaporator 15 of each showcase 2 returns to the first compressor 11 via the gas refrigerant pipe 17. Thus, the refrigeration capacity is exhibited in each evaporator 15 by the first refrigeration cycle circuit 10 operating continuously.

  When the pressure detected by the low pressure side pressure sensor 43 becomes less than the predetermined value by the operation, the refrigerator controller C3 stops the operation of the first compressor 11. Thereby, highly efficient cooling operation corresponding to the cooling load is performed.

  On the other hand, based on the cooperation command of the integrated controller C1, the supercooling water heater controller C4 cooperates with the refrigerator unit controller C3 and interlocks with the ON / OFF of the first compressor 11 of the refrigerator unit 3, The second compressor 21 of the cooling water heater 4 is ON / OFF controlled. Thereby, the inconvenience that the operation efficiency of the whole apparatus falls can be avoided. Note that the control of the second compressor 21 is not limited to this. When the first compressor 11 is controlled by the inverter, the supercooling water heater controller C4 is a refrigerator unit. In conjunction with the controller C3, the second compressor 21 may be controlled by an inverter in conjunction with the rotational speed control of the first compressor 11.

  Here, based on the cooperation command of the integrated controller C1, the supercooling water heater controller C4 cooperates with the hot water storage controller C5 to detect the hot water amount from the temperature distribution in the hot water storage tank 31, and the hot water amount becomes the lower limit amount. When it reaches (when there is a hot water storage request), the heat release side electromagnetic valve 27 of the supercooling water heater 4 is closed and the hot water supply side electromagnetic valve 26 is opened. Thereby, when the second compressor 21 is operated in the second refrigeration cycle circuit 20, the high-temperature refrigerant discharged from the second compressor 21 is in the refrigerant flow path 22 a of the second radiator 22. It is cooled by exchanging heat with hot water flowing through the water flow path 22b. In the second radiator 22, since the carbon dioxide refrigerant is in a supercritical state, its temperature decreases as it is cooled by heat exchange with water without condensing. Here, since the refrigerant flow path 22a and the water flow path 22b are provided to face each other, efficient heat exchange between the supercritical refrigerant having a temperature gradient accompanying heat exchange and water becomes possible. . Thereby, hot water can be boiled with high efficiency.

  Then, the refrigerant cooled in the second radiator 22 is decompressed by the expansion valve 23 and then flows into the second flow path 13 b of the subcooler 13. In the subcooler 13, the refrigerant of the second refrigeration cycle circuit 20 exchanges heat with the refrigerant of the first refrigeration cycle circuit 10, and the refrigerant of the first refrigeration cycle circuit 10 is the second refrigeration cycle circuit 20. The refrigerant is supercooled by the evaporation of the refrigerant.

  At this time, the supercooling water heater controller C4 makes the refrigerant temperature on the outlet side of the first refrigeration cycle circuit side flow path 13a of the supercooler 13 detected by the supercooling temperature sensor 46 become a predetermined value. The rotational speed of the second compressor 21 is controlled. As a result, an appropriate degree of supercooling corresponding to the cooling load can be realized, and a highly efficient cooling operation can be realized. Further, as described above, the second compressor 21 performs ON-OFF control in conjunction with the ON-OFF of the first compressor 11 of the refrigerator unit 3, so that the first refrigeration cycle circuit 10 includes the second compressor 21. Unnecessary supercooling operation when the first compressor 11 is stopped can be prevented.

  Moreover, the supercooling water heater controller C4 controls the opening degree of the expansion valve 23 so that the refrigerant discharge temperature of the second compressor 21 detected by the refrigerant discharge temperature sensor 45 becomes a predetermined value. Thereby, it is possible to maintain a suitable cycle condition for boiling hot water to a predetermined temperature, and to realize highly efficient supercooling and hot water supply.

  The refrigerant that has flowed out of the second flow path 13 b of the subcooler 13 returns to the second compressor 21. As described above, the second refrigeration cycle circuit 20 continuously operates, so that the refrigerant in the first refrigeration cycle circuit 10 is supercooled by the second refrigeration cycle circuit 20 and hot water is supplied using the exhaust heat. Can be heated.

  In the hot water supply circuit 30, the low-temperature water taken out from the lower part of the hot water supply tank 31 flows into the water flow path 22 b of the second radiator 22 through the water pipe 32 a by the operation of the circulation pump 35. Thereby, in the second radiator 22, the water flowing out of the hot water storage tank 31 is heated by exchanging heat with the high-temperature refrigerant of the second refrigeration cycle circuit 20. Then, the hot water heated to a high temperature flows into the tank from the upper part of the hot water storage tank 31 through the water pipe 32b.

  The temperature of the hot water heated to the hot water storage tank 31 is set by the hot water storage device controller C5 so as to be a predetermined temperature. That is, when the hot water amount in the hot water storage tank 31 reaches a predetermined upper limit based on the detection of the hot water amount sensor 50 (when there is no hot water storage request), the hot water storage controller C5 is connected to the supercooling water heater via the integrated controller C1. In cooperation with the controller C4, the hot water supply side electromagnetic valve 26 is closed and the heat radiation side electromagnetic valve 27 is opened, and the high temperature refrigerant discharged from the second compressor 21 is controlled to flow into the third heat radiator 25. Thereby, the refrigerant can flow into the second radiator 22 according to the hot water supply request of the hot water storage device 5, can realize efficient hot water supply, and the hot water in the hot water supply tank 31 is more than necessary. It is possible to avoid the inconvenience that it flows into the second radiator 22 and the heat exchange efficiency in the second radiator is reduced.

  The hot water storage controller C5 cooperates with the supercooling water heater controller C4 via the integrated controller C1, and detects the hot water temperature at the outlet side of the water flow path 22b of the second radiator 22 with the hot water temperature sensor 47. When the temperature of the hot water is lower than a predetermined temperature (for example, + 85 ° C.), the circulation pump 35 is operated at a low rotational speed. When the temperature is higher than the predetermined temperature, the circulation pump 35 is operated at a high rotational speed. .

  When the hot water supply valve is opened from the upper part of the hot water storage tank 31 and hot water is drawn out and consumed through the hot water supply pipe 33, the same amount of tap water is replenished from below and flows in. Thereby, hot water is always stored in the hot water storage tank 31 up to the position of the hot water amount sensor 50, and the lower part is maintained in a two-layer state in which the temperature is low.

  Next, hot water supply / heat radiation control scheduling of the second refrigeration cycle circuit 20 according to the present invention will be described. The subcooling efficiency of the refrigerant in the first refrigeration cycle circuit 10 by the subcooler 13 in the second refrigeration cycle circuit 20 is higher than that in the case where the third heat radiator 25 performs heat radiation to the second radiator. 22 is higher when hot water is supplied. This is because the low-temperature water supplied from the lower part of the hot water storage tank 31 is compared with the case where the high-temperature refrigerant discharged from the second compressor 21 of the second refrigeration cycle circuit 20 is subjected to heat exchange with the atmosphere at the outside temperature. This is because the temperature difference between the inlet and outlet of the heat exchanger can be increased and the refrigeration effect is increased.

  In the conventional configuration, it is determined whether the high-temperature refrigerant discharged from the second compressor 21 is used for hot water supply or is radiated to the atmosphere according to the presence or absence of a hot water supply request from the hot water supply device 5. Therefore, if there is no hot water supply request, there is a problem in that high supercooling efficiency due to hot water supply cannot be used even in the peak power generation time zone in which the power consumption is the largest in the day.

Therefore, in this embodiment, control scheduling of hot water supply / heat radiation based on a measurement value database constructed for each time zone and environmental condition is performed. First, the above-described measurement value database 55 is constructed in the memory of the integrated controller C1. In this database 55, environmental condition cells of data are classified based on two conditions of an outside air temperature To and a time zone t, which are indicators for determining an operating environment condition (hereinafter referred to as an environmental condition), and are classified into a plurality of stages. Registered as discrete data. The discretization rule in this case is
Outside air temperature To (° C.): The range of −5 ° C. to + 40 ° C. is classified into 10 steps in 5 deg increments (in practice, an average value per 30 minutes is adopted).
Time zone t: Classified into 48 stages in units of 30 minutes.
In total, 480 environmental condition cells (shown in FIG. 3) are configured. The discretization rule is not limited to this.

  The outside air temperature To is an environmental condition influenced by the natural environment, and in this embodiment, the outside air temperature detected by the outside air temperature sensor 44 provided in the refrigerator unit 3 is adopted. Collected in the integrated controller C1 via the refrigerator unit controller C3. In addition, changes in the power consumption of the entire device R are affected not only by the natural environment, but also by the frequency of food in and out by store staff and customers, turning off lights for energy-saving purposes when the store is closed, blockage at night covers, etc. The situation can be determined by the time zone t. The time zone t is acquired by a timer 52 provided in the control unit 53 of the integrated controller C1. When the outside air temperature To is lower than −5 ° C., it is treated as −5 ° C., and when it is higher than + 40 ° C., it is treated as + 40 ° C.

  Then, the integrated controller C1 adds, to each environmental condition cell of the measurement value database 55, an integrated value of hot water consumption in the hot water storage tank 31 in each time zone t, an integrated value of the hot water supply amount by the supercooling water heater 4, and the entire apparatus. The integrated value of the power consumption is registered as shown in FIG. Each environmental condition cell includes an integrated value of hot water consumption in each time zone t detected by the hot water consumption flow sensor 48 and an integrated value of hot water consumption in each time zone t detected by the hot water supply flow rate sensor 49. And the integrated value of the power consumption of the whole apparatus in each time slot | zone t detected by the wattmeter 58 is each preserve | saved in the measured value database 55 each. When there are a plurality of past data in the same environmental condition cell by operating for a year, a predetermined number is stored, and the oldest ones are discarded in order. Then, an average value of a plurality of data in the same environmental condition cell is calculated and stored, or an average value is calculated when necessary. The measurement value database 55 is constructed only when the hot water is supplied in the time zone t, when the data is stored in the database, and when the refrigerant is caused to flow into the third heat exchanger 25 to release the air. The database is not saved.

  Next, the control scheduling operation will be described with reference to the timing chart of FIG. 4 and the flowcharts of FIGS. The control scheduling operation is executed once in a predetermined period. For example, a hot water supply / power supply for a next predetermined period (for example, 24 hours on the current day) at a time when power consumption is small, for example, at midnight. Schedule heat dissipation. First, a prediction process of power consumption amount, hot water supply amount, and hot water consumption amount for the next predetermined period of the integrated controller C1 is performed.

  In the prediction process, the integrated controller C1 is connected to the server device via a communication line such as a LAN, and in the present embodiment, in the present embodiment, acquires the JMA data (meteorological forecast data) for the next 24 hours. . The prediction unit 56 predicts the outside air temperature for the next 24 hours based on the Japan Meteorological Agency data and the hot water supply amount, hot water consumption, and peak power generation time in each time zone t based on the measured value database 55 constructed so far. Predict the belt. Thereby, prediction of the hot water supply amount, hot water consumption amount, and peak power generation time zone based on the weather observation forecast can be realized.

  Specifically, the prediction unit 56 calculates an average value of the predicted outside air temperature in each time zone t (30 minutes in this embodiment) from the acquired outside air temperature prediction for 24 hours. Then, referring to the environmental condition cell registered in the measured value database 55 that matches the average value of the predicted outside air temperature and the environmental condition of the time zone t, the integrated value Hdt of hot water consumption in the time zone t and the hot water supply amount And an integrated value Et of the power consumption of the entire apparatus. In addition, when the accumulated value data of the consumption amount, supply amount value, and power consumption amount of each hot water have not yet been registered in the environmental condition cell that matches the corresponding environmental condition, the initial value was entered. It is assumed that a value is used or the prediction process in the time zone is not executed.

  Then, the predicting unit 56 includes an integrated value of hot water consumption for each time zone t (consumption prediction for each time zone) Hdt, an integrated value of hot water supply (hot water supply prediction for each time zone) Hst, and a device. An integrated value (power consumption prediction for each time zone) Et of the total power consumption is obtained for 24 hours. Presence / absence of a peak power generation time zone is predicted from the transition of the integrated value of the power consumption of the entire acquired apparatus. If there is no peak power generation time period exceeding the power consumption defined in advance, the subsequent hot water supply / heat radiation control scheduling operation is not performed.

  Next, when there is a peak power generation time zone, determination processing of hot water supply / heat radiation operation for each time zone t is performed. The determination unit 57 of the integrated controller C1 integrates the hot water supply amount and the hot water consumption in order from the time zone with the earlier determination time, and the accumulated hot water supply amount HS in the previous time zone t is integrated. A time zone exceeding a predetermined value than the consumption amount HD of hot water is determined (hot water supply determination flag determination).

  Specifically, in step S1 of the flowchart of FIG. 5, an integrated value Hst1 of the hot water supply amount and an integrated value Hdt1 of the hot water consumption amount for the first time period t1 are acquired, and in step S2, the integrated hot water consumption amount is acquired. It is determined whether or not the value obtained by adding the predetermined value X to the value Hdt1 exceeds the integrated value Hst1 of the hot water supply amount. When the value obtained by adding the predetermined value X to the integrated value Hdt1 of the hot water consumption is equal to or less than the integrated value Hst1 of the hot water supply amount, the process proceeds to step S3 and proceeds to the next time zone t2.

  FIG. 4 shows the amount of hot water supply (bar graph extending upward) and the amount of hot water consumption (bar graph extending downward) with respect to the transition of each time zone t in order from the left. According to this, there is no consumption of hot water from the first time zone t1 to t6. Therefore, in step S3, after proceeding to the next time zone t2, the process proceeds to step S1, and the integrated value Hst2 of the hot water supply amount in the next time zone t2 is integrated with the integrated value HS (Hst1) of the hot water supply so far. Similarly, the integrated value Hdt2 of hot water consumption in the next time zone t2 is integrated into the integrated value HD (Hdt1) of hot water consumption so far. Also in this case, the value obtained by adding the predetermined value X to the integrated value HD (Hdt1 + Hdt2) of hot water consumption is equal to or less than the integrated value HS (Hst1 + Hst2) of hot water supply, and therefore the predetermined value X is added to the integrated value HD of hot water consumption. The next integrated value is sequentially added to the integrated value so far until the value obtained by adding exceeds the integrated value HS of the hot water supply amount.

  In the embodiment of FIG. 4, consumption of hot water is predicted for the first time in the time zone t7, but a predetermined value X is added to the integrated value HD (Hdt1 + Hdt2 +... + Hdt7) of hot water consumption from the time zone t1 to t7. The value is less than or equal to the integrated value HS (Hst1 + Hst2 +... + Hst7) of hot water supply, that is, since there is no excessive hot water supply, the process returns to step S1 again, and further, the integrated value Hst8 of hot water supply for time zone t8, The amount integrated value Hdt8 is added to the previous integrated values HS and HD, respectively.

  As a result, in step S2 when the time zone t8 is integrated (time A in FIG. 4), a value obtained by adding the predetermined value X to the integrated value HD (Hdt1 + Hdt2 +... + Hdt8) of hot water consumption Exceeds the integrated value HS (Hst1 + Hst2 +... + Hst8), the process proceeds to step S4, where a “hot water supply confirmation” flag is set for each of the time zones thus far and the time zones t1 to t8 added so far. Since such a time zone is a time zone in which hot water supply is required, that is, a state where there is no excessive hot water supply, the hot water supply operation is determined by the control scheduling operation.

  Thereafter, the process proceeds to step S5, and when the integrated value HD of the hot water consumption at this time (the time when t1 to t8 are integrated) is larger than the integrated value HS of the hot water supply, the process proceeds to step S6. In this case, at the predicted time zone t8, hot water consumption is excessive with respect to the hot water supply amount, and the hot water supply amount is insufficient, so hot water supply assistance using other equipment such as gas is performed. Is predicted. In order to compensate for the lack of hot water supply with respect to the hot water consumption by other equipment, in the control scheduling operation, the integrated value HS of the hot water supply so far and the integrated value HD of the hot water consumption are the same, that is, these Assuming that the difference is zero, the process proceeds to step S3. On the other hand, in step S5, if the accumulated value HS of the hot water supply amount at this time (when t1 to t8 are accumulated) is equal to or greater than the accumulated value HD of the hot water consumption, the process proceeds to step S3 without correction. .

  In step S3, the process proceeds to the next time zone t9. In step S1, the integrated value Hst9 of the hot water supply amount and the integrated value Hdt9 of the hot water consumption amount in the time zone t9 predicted for each of the integrated values HS and HD thus far are calculated. Is added. In the case of FIG. 4, since the integrated value of the hot water supply amount after the time zone t9 is always in a state exceeding the integrated value of the hot water consumption amount, the hot water supply is excessive. Is not set. And the hot water supply determination flag determination is complete | finished by performing the said determination about all the time zones for 24 hours.

  Next, the determination unit 57 performs a determination process of a heat release determination flag or a hot water supply determination flag for a time zone t in which the “hot water supply determination” flag is not set. First, in step S7, the difference between the integrated value Hst of the hot water supply amount and the integrated value Hdt of the hot water consumption in each time zone t becomes the minimum value in the time zone in which the “fixed hot water supply” flag is not set. Check the time zone t.

  In FIG. 4, since the hot water supply determination flag is set for the time zones t1 to t8, the determination process of the heat release determination flag or the hot water supply determination flag is performed for the time zones t9 to t28. In step S7, the difference between the integrated value HS of the hot water supply amount and the integrated value HD of the hot water consumption up to each time zone t in the time zones t9 to t28 is the minimum value at t15 (time point B in the figure). Become.

  Thereafter, the determination unit 57 proceeds to step S8, and sets the time zone t from the beginning of the time zone that is the subject of the determination treatment to the time zone where the difference is the minimum value as the heat release judgment target time zone. In FIG. 4, the time zone from the time zone t9 to t15 is set as the heat release determination target time zone. In the heat dissipation determination target time zone, no flag is set, and the power consumption Et of the entire device R other than the peak power generation time zone where the power consumption Et exceeds a predetermined value is minimized. Check the time zone.

  In FIG. 4, the transition of the power consumption Et acquired from the measurement value database is shown on the bar graph indicating the hot water supply amount. According to this, in the time zone from the time zone t9 to t15, the power consumption is minimized in the time zone t11.

  Thereafter, the determination unit 57 proceeds to step S9, and sets a “heat release confirmation” flag in a time zone in which the power consumption is minimized. In FIG. 4, the “heat release confirmed” flag is set in the time zone t11 in which the power consumption is minimum in the time zone from the time zone t9 to t15.

  Then, the integrated value Hst11 of the hot water supply amount predicted in the time zone t11 is subtracted from the integrated value HS of the hot water supply amount in the heat radiation determination target time zone (HS = Hst9 +... Hst15−Hst11). The integrated value HS of the hot water supply amount obtained by subtracting the integrated value Hst11 of the predicted hot water supply amount in the time zone in which the heat dissipation confirmation flag is set is set to a predetermined value X as the integrated value HD of hot water consumption in the heat dissipation determination target time zone. It is determined whether or not the value is smaller than the added value (step S10).

  In step S10, if the integrated value HS of the hot water supply after subtraction is still equal to or greater than the value obtained by adding the predetermined value X to the integrated value HD of hot water consumption in the heat release determination target time zone, the process returns to step S8 to release heat. In the time zone to be determined, a time zone in which none of the flags are set and the power consumption Et of the entire device R other than the peak power generation time zone is minimum is checked.

  In this case, among the time zones t9 to t15 that are the heat release determination target time zone, the heat release confirmation flag is set in the time zone t11, and thus the power consumption Et of the entire device R is the minimum in the other time zones. The time zone is a time zone t10. Therefore, in step S9, the “heat release confirmed” flag is set in the time zone t10, and the integrated value HS of the hot water supply amount obtained by subtracting the integrated value Hst10 of the predicted hot water supply amount in the time zone t10 is the hot water in the heat release determination target time zone. It is determined whether or not it is smaller than a value obtained by adding a predetermined value X to the integrated value HD of the consumption amount (step S10).

  Thereafter, similarly, the “heat dissipation confirmation” flag is sequentially set in a time zone in which the power consumption Et is minimized in the heat radiation determination target time zone. In the present embodiment, the time zone t15 of the current heat release determination target time zones t9 to t15 is the peak power generation time zone, so that in addition to the time zones t11 and t10, the time zones t9, t12, t13, and t14 are “ A "heat release confirmed" flag is set.

  At this time, the integrated value HS of the hot water supply amount obtained by subtracting the integrated value (Hst9 +... + Hst14) of the predicted hot water supply amount in the time period t9 to t14 in which the heat release confirmation flag is set is the heat release determination target time zone. It becomes smaller than a value obtained by adding a predetermined value X to the accumulated value HD of hot water consumption. Accordingly, the process proceeds from step S10 to step S11, and the “hot water supply confirmation” flag is set for the time period t15 in which the “heat radiation determination” flag is not set in the heat radiation determination target time periods t9 to t15.

  Subsequently, returning to the top of the flowchart of FIG. 6 again, step S7 is executed. That is, since any one of the flags is set from time t1 to t15 in the process so far, next, the determination process of the heat release confirmation flag or the hot water supply confirmation flag is performed for the time periods t16 to t28. In this case, in the time period t16 to t28, the difference between the integrated value HS of the hot water supply amount and the integrated value HD of the consumption amount of hot water up to each time period t becomes the minimum value at t21 (time point B in the figure). .

  Proceeding to step S8, the heat release determination target time zone in this case is set to time zones t16 to t21. In the heat release determination target time zone, the time zone in which the power consumption Et is the minimum is t21, and the next time zone in which the power consumption becomes smaller is t20. The electric power consumption Et is minimized until the integrated value HS of the hot water supply amount in the heat dissipation determination target time zone becomes smaller than the sum of the hot water consumption amount HD in the heat dissipation determination target time zone plus a predetermined value X. The “heat release confirmed” flag is set in the time zone, and the hot water supply amount Hst in that time zone is sequentially subtracted. In this case, the “radiation confirmation” flag is set sequentially in the time zones t21 and t20, and the “hot water supply confirmation” flag is set in the time zones t16 to t19 where the power consumption is large. Similarly, a “hot water supply confirmation” or “heat release confirmation” flag is set for the remaining time zones.

  In this manner, the “hot water supply confirmation” or “heat release confirmation” flag is set for each time slot t for 24 hours. Based on the confirmation flag, the control unit 53 of the integrated controller C1 issues a hot water supply command to the supercooling water heater controller C4 in each time zone t during the time zone in which the “hot water supply confirmation” flag is set. Based on this, the supercooling water heater controller C4 closes the heat-dissipation-side electromagnetic valve 27 and opens the hot-water supply-side electromagnetic valve 26, and causes the high-temperature refrigerant discharged from the second compressor 21 to flow to the second radiator 22. Heat the hot water. On the other hand, in the time zone in which the “heat release confirmed” flag is set, a heat release command is issued to the supercooling water heater controller C4. Based on this, the supercooling water heater controller C4 closes the hot water supply side electromagnetic valve 26 and opens the heat radiation side electromagnetic valve 27, and causes the high temperature refrigerant discharged from the second compressor 21 to flow to the third heat radiator 25. , Dissipate heat to the atmosphere.

  As a result, when it is predicted that the hot water supply will be excessive from the relationship between the hot water supply amount and the hot water consumption, the “radiation confirmed” flag is set in the time zone t other than the peak power generation time zone when the power consumption exceeds the predetermined value. By performing the setting, the hot water supply / heat radiation control is executed based on the hot water supply / heat radiation control scheduling operation, thereby avoiding heat radiation to the atmosphere by the third radiator 25 during the peak power generation time period. The hot water can be heated by the heat radiation action of the radiator 22. Thereby, the supercooling efficiency of the supercooler 13 in the peak power generation time zone can be increased, and the operating efficiency of the first refrigeration cycle circuit 10 can be improved.

  In particular, in this embodiment, the consumption of hot water in the hot water storage tank 31, the amount of hot water supplied by the supercooling water heater 4, and the power consumption of the entire apparatus R are classified according to the time zone t and the environmental conditions at that time. Based on the measured value database constructed by storing the data, the consumption of hot water in the hot water storage tank 31, the amount of hot water supplied by the supercooling water heater 4, and the peak power generation time zone in the subsequent predetermined period are predicted and predicted. If there is a time zone in which hot water supply is excessive based on the amount of hot water supply and consumption of hot water, a heat release confirmation flag is set in the time zone in which the amount of power consumption is minimum, and the third Since the refrigerant is allowed to flow through the radiator 25, the refrigerant can be allowed to flow into the second radiator 22 in response to the hot water supply request during the peak power generation time period.

  Therefore, the refrigerant of the second refrigeration cycle circuit 20 can be cooled with high heat exchange efficiency in the peak power generation time period, and thereby the subcooling efficiency of the first refrigeration cycle circuit 10 in the subcooler 13 can be reduced. Can be improved. Therefore, the operation efficiency of the entire apparatus R in the peak power generation time zone can be increased, and the power consumption can be suppressed.

  Further, in this embodiment, since the time zone in which the refrigerant flows through the third radiator 25 is given priority over the time zone in which the power consumption is minimized, the power consumption can be leveled. . Thereby, the excessive load in the time zone with much power consumption can be eliminated.

  In actual operating conditions, the actual hot water supply amount and hot water consumption are measured value databases that serve as indices for setting the hot water supply confirmation flag and the heat release confirmation flag, or the actual outside air temperature is significantly higher than the weather forecast data. In the case where the hot water supply is not excessively consumed but excessively consumed, the high-temperature refrigerant discharged from the second compressor 21 is discharged to the second heat dissipation even in the time zone in which the heat dissipation confirmation flag is set. It is assumed that the hot water is heated by the heat dissipation action of the refrigerant in the second radiator 22 by flowing into the heater 22 side.

  As described above in detail, the refrigeration apparatus R of the present embodiment includes the refrigeration unit 3 that houses the first compressor 11 and the first radiator 12, and the first decompressor (expansion valve 14). And the showcase 2 that houses the evaporator 15, the second compressor 21, the second radiator 22, the third radiator 25, the second decompressor (expansion valve 23), and the supercooler 13. Each of the supercooled water heater 4 and the hot water storage device 5 having the hot water storage tank 31 connected to the second radiator 22 of the supercooled water heater 4 via the water pipe 32. Therefore, installation work can be easily performed. That is, after installing the showcase 2, the refrigerator unit 3, the supercooling water heater 4 and the hot water storage device 5 at the construction site, the first refrigeration cycle circuit 10, the second refrigeration cycle circuit 20 and the hot water supply circuit are installed. 30 can be configured by connecting the piping connection ports of the devices unitized so as to configure 30 by piping. In this case, according to the cooling load and hot water supply load required at the installation site, select the number of units installed in each unit and combine the required number to match the cooling load and hot water supply load. A refrigeration apparatus having excellent performance and capable of performing hot water supply utilizing cooling exhaust heat can be easily constructed.

  In addition, it is possible to easily construct the refrigeration apparatus of the present embodiment by modifying existing equipment. For example, by using the existing refrigerator (refrigerator unit 3) and the showcase 2 as they are, newly installing a supercooling water heater 4 and a hot water storage device 5 will improve the refrigeration capacity and refrigeration efficiency of the existing equipment. In addition, it is possible to supply hot water that effectively uses the cooling exhaust heat.

R refrigeration apparatus C1 integrated controller 2 showcase 3 refrigerator unit 4 supercooling water heater 5 hot water supply apparatus 10 first refrigeration cycle circuit 11 first compressor 12 first radiator 13 supercooler 13a first refrigeration cycle Circuit side channel (first channel)
13b Second refrigeration cycle circuit side channel (second channel)
14 Expansion valve (first decompressor)
DESCRIPTION OF SYMBOLS 15 Evaporator 20 2nd refrigeration cycle circuit 21 2nd compressor 22 2nd heat radiator 22a Refrigerant flow path 22b Water flow path 23 2nd decompressor (expansion valve)
25 Third radiator 26 Hot water supply side solenoid valve (flow path switching means)
27 Heat dissipation side solenoid valve (flow path switching means)
DESCRIPTION OF SYMBOLS 30 Hot water supply circuit 31 Hot water storage tank 35 Circulation pump 44 Outside temperature sensor 48 Hot water consumption flow rate sensor 49 Hot water supply flow rate sensor 50 Hot water amount sensor 53 Control part 55 Measurement value database 56 Prediction part 57 Judgment part 58 Power meter

Claims (6)

A first refrigeration cycle circuit comprising a first compressor, a first radiator, a subcooler, a first pressure reducer, and an evaporator sequentially connected by piping, a second compressor, and a second radiator A second refrigeration cycle circuit formed by sequentially connecting a second pressure reducer and the supercooler by pipe connection, and in the subcooler, the first refrigeration cycle circuit causes the first refrigeration cycle circuit to evaporate the first refrigeration cycle circuit. In the refrigerating apparatus that superheats the refrigerant in the refrigeration cycle circuit and heats hot water by the heat radiation action from the second radiator to supply hot water,
A third radiator for releasing heat of the refrigerant of the second refrigeration cycle circuit to the atmosphere;
Flow path switching means for controlling whether the refrigerant discharged from the second compressor flows to the second radiator or the third radiator;
Control means for controlling the flow path switching means,
The control means supplies the hot water by flowing the refrigerant to the second radiator by the flow path switching means, and when it is predicted that the hot water supply will be excessive from the relationship between the hot water supply amount and the hot water consumption amount, The refrigeration apparatus is characterized in that control is performed to cause the refrigerant to flow through the third radiator by the flow path switching means in a time zone other than the peak power generation time zone in which the value exceeds a predetermined value. A refrigerator unit that houses the first compressor and the first radiator;
A showcase housing the first decompressor and the evaporator;
A supercooling water heater that houses the second compressor, the second radiator, the third radiator, the second decompressor, and the supercooler;
The refrigerating apparatus according to claim 1, comprising a hot water storage device having a hot water storage tank connected to a second radiator of the supercooling water heater via a water pipe.   The control means operates the second compressor of the supercooling water heater in conjunction with the first compressor of the refrigeration unit, and the flow path switching means performs the first operation in response to a hot water supply request in the hot water storage device. The refrigerating apparatus according to claim 2, wherein the refrigerant is caused to flow through the heat radiator. The control means classifies and stores the consumption of hot water in the hot water storage tank, the amount of hot water supplied by the supercooled water heater, and the amount of power consumption of the entire apparatus, classified according to the time zone and environmental conditions at that time. A measured value database constructed by
Based on the measured value database, a prediction unit that predicts the consumption of hot water in the hot water storage tank in a predetermined period thereafter, the amount of hot water supplied by the supercooled water heater, and the peak power generation time zone,
A determination unit that determines the presence or absence of a hot water supply excess time period from the hot water supply amount and hot water consumption predicted by the prediction unit;
A controller for controlling the flow path switching means,
When the determination unit determines that there is a time zone in which hot water supply is excessive, the control unit uses the flow path switching unit in the time zone in which the power consumption is minimized. The refrigeration apparatus according to claim 3, wherein the refrigerant is caused to flow through the radiator.   5. The refrigeration apparatus according to claim 4, wherein the prediction unit predicts the hot water supply amount, hot water consumption amount, and peak power generation time zone from environmental conditions in a predetermined period thereafter based on JMA data.   6. The refrigerant enclosed in the second refrigeration cycle circuit is carbon dioxide, and the second radiator acts as a gas cooler. Refrigeration equipment.

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