WO2023058373A1 - Appareil de congélation - Google Patents

Appareil de congélation Download PDF

Info

Publication number
WO2023058373A1
WO2023058373A1 PCT/JP2022/033074 JP2022033074W WO2023058373A1 WO 2023058373 A1 WO2023058373 A1 WO 2023058373A1 JP 2022033074 W JP2022033074 W JP 2022033074W WO 2023058373 A1 WO2023058373 A1 WO 2023058373A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
gas cooler
refrigerant
flow rate
water pipe
Prior art date
Application number
PCT/JP2022/033074
Other languages
English (en)
Japanese (ja)
Inventor
裕也 山田
賢治 金城
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2023058373A1 publication Critical patent/WO2023058373A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously

Definitions

  • the present disclosure relates to a refrigeration system connected to a refrigerator or a freezer showcase, and more particularly to a refrigeration system capable of supplying hot water using exhaust heat from the refrigeration system.
  • Patent Document 1 discloses a refrigeration system that uses water heated by waste heat of the refrigeration system for supplying hot water.
  • This refrigeration system includes an intercooler that cools the refrigerant discharged from the low-stage compression mechanism and a gas cooler that cools the refrigerant discharged from the high-stage compression mechanism, and the intercooler and the gas cooler are connected in parallel by water piping. The water heated by the intercooler and gas cooler is used for hot water supply.
  • the present disclosure provides a refrigeration apparatus capable of switching between an operation in which hot water is supplied and an operation in which hot water is not supplied in accordance with the demand for hot water supply while performing cooling operation of the refrigeration apparatus.
  • a refrigerating device is a refrigerating device that cools a refrigerant by heat exchange between the refrigerant and water, and includes a low-stage compression mechanism, an intercooler that cools the refrigerant discharged from the low-stage compression mechanism, and an intercooler.
  • a high-stage compression mechanism that sucks refrigerant and a gas cooler that cools the refrigerant discharged from the high-stage compression mechanism are connected by refrigerant piping, and a water supply means, an intercooler, a gas cooler, an external heat dissipation device,
  • the hot water supply means and the water supply mechanism are connected by a water pipe, and a first flow rate adjusting mechanism is provided for adjusting the flow rate of water flowing into the hot water supply means and the external radiator after passing through the gas cooler.
  • the refrigeration apparatus can flow water heated by the gas cooler to the hot water supply means when hot water supply is required and to the external radiator when hot water supply is not required by the first flow rate adjustment mechanism. Therefore, it is possible to switch between an operation in which hot water is supplied and an operation in which hot water is not supplied, and the cooling operation of the refrigeration system can be continued regardless of the demand for hot water supply.
  • a refrigerating device that supplies hot water using exhaust heat from the refrigerating device must continue cooling operation of the refrigerating device regardless of the demand for hot water supply, unlike a general heat pump water heater. Therefore, the inventors provided an external heat radiator, and when hot water supply is not required, the water heated by the exhaust heat of the refrigerating device is radiated by the external heat radiating device, and the water is circulated to cool the refrigerating device. I decided to keep driving. However, when hot water supply is required, water stays in the external heat radiator, and when the ambient temperature drops below freezing, the problem that the water in the external heat radiator freezes is discovered, and the problem is solved. have thus come to constitute the subject matter of this disclosure.
  • the present disclosure is a refrigerating device capable of switching between an operation in which hot water is supplied and an operation in which hot water is not supplied according to the demand for hot water supply while continuing the cooling operation of the refrigerating device, and which is capable of preventing water from freezing. I will provide a.
  • Embodiment 1 (Embodiment 1) Embodiment 1 will be described below with reference to FIGS. 1 to 6. FIG.
  • the refrigeration system 100 includes a compressor 180 including a low-stage compression mechanism 110 and a high-stage compression mechanism 111, an intercooler 120 that cools the refrigerant discharged from the low-stage compression mechanism 110, and a high-stage compression mechanism 111.
  • a gas cooler 130 for cooling the refrigerant discharged from the gas cooler 130 and an auxiliary gas cooler 131 for further cooling the refrigerant discharged from the gas cooler 130 are provided.
  • the refrigerating device 100 is connected to a cooling device 170 that is cooled by the refrigerant sent out from the refrigerating device 100 .
  • the cooling device 170 is configured by connecting an evaporator 171 and an expansion mechanism 172, and is installed, for example, in a store such as a convenience store or a supermarket, such as a showcase for displaying refrigerated or frozen products while cooling them. is.
  • the low-stage compression mechanism 110 also includes a low-stage suction port 181 and a low-stage discharge port 182 .
  • the high-stage compression mechanism 111 has a high-stage suction port 183 and a high-stage discharge port 184 .
  • the equipment that configures the refrigerating apparatus 100 and the equipment that configures the cooling device 170 are connected by refrigerant pipes 135 through which the refrigerant flows.
  • the refrigerant pipe 135 includes a low-pressure suction pipe 190 connecting the evaporator 171 and the low-stage suction port 181, an intermediate-pressure discharge pipe 192 connecting the low-stage discharge port 182 and the intercooler 120, and the intercooler 120 and the high-stage suction port. 183, a high-pressure discharge pipe 193 connecting the high-stage discharge port 184 and the gas cooler 130, a high-pressure connection pipe 194 connecting the gas cooler 130 and the auxiliary gas cooler 131, and an auxiliary It is composed of an outlet pipe 195 that connects the gas cooler 131 and the expansion mechanism 172 .
  • the refrigeration system 100 of the present embodiment uses, as a refrigerant, carbon dioxide whose refrigerant pressure on the high-pressure side is equal to or higher than the critical pressure (supercritical).
  • This carbon dioxide refrigerant is a natural refrigerant that has a low environmental load and is non-flammable and non-toxic.
  • the refrigerating apparatus 100 of the present embodiment is of a water-cooled type, and includes a water supply tank as the water supply means 140, a hot water storage tank as the hot water supply means 150, and an air-cooled closed cooling tower as the external radiator 160. These devices and the intercooler 120, the gas cooler 130, and the auxiliary gas cooler 131 of the refrigeration system 100 are connected by a water pipe 200 through which water flows.
  • the water pipes 200 include a first water pipe 201 connecting the water supply means 140 and the gas cooler 130 via the auxiliary gas cooler 131, a second water pipe 202 connecting the gas cooler 130 and the hot water supply means 150, A third water pipe 203 branched from the water pipe 201 and connected to the intercooler 120, a fourth water pipe 204 connecting the intercooler 120 and the external radiator 160, and a third water pipe 204 connecting the external radiator 160 and the water supply means 140. a fifth water pipe 205; a sixth water pipe 206 branching from the second water pipe 202 and joining the fourth water pipe 204; and a seventh water pipe 207 that merges with.
  • first water pipe 201 and the third water pipe 203 connect the intercooler 120 and the auxiliary gas cooler 131 in parallel. Also, the first water pipe 201 connects the auxiliary gas cooler 131 and the gas cooler 130 in series.
  • the first water pipe 201 is equipped with a water pump as a water supply mechanism 210 .
  • the fourth water pipe 204 is equipped with a plug heater as an antifreeze heater 220 .
  • a first flow rate adjusting mechanism 230 is provided at the branching portion of the second water pipe 202 branching to the sixth water pipe 206 .
  • a second flow control mechanism 231 is provided at the branching portion of the first water pipe 201 branching to the third water pipe 203 .
  • a third flow rate adjusting mechanism 232 is provided at the branching portion of the first water pipe 201 branching to the seventh water pipe 207 .
  • three-way flow control valves are used for the first flow control mechanism 230, the second flow control mechanism 231, and the third flow control mechanism 232.
  • An incoming water temperature sensor 240 for detecting the temperature of water flowing into the intercooler 120 and the auxiliary gas cooler 131 is provided on the pipe surface of the first water pipe 201 .
  • An intercooler outlet refrigerant temperature sensor 241 that detects the temperature of the refrigerant that has passed through the intercooler 120 is provided on the pipe surface of the intermediate pressure suction pipe 191 .
  • An auxiliary gas cooler outlet refrigerant temperature sensor 242 that detects the temperature of the refrigerant that has passed through the auxiliary gas cooler 131 is provided on the pipe surface of the outlet pipe 195 .
  • An external radiator outlet water temperature sensor 243 that detects the temperature of water that has passed through the external radiator 160 is provided on the pipe surface of the fifth water pipe 205 .
  • a hot water temperature sensor 244 for detecting the temperature of hot water is provided on the surface of the second water pipe 202 .
  • the refrigeration apparatus 100 also includes a control section 250 (not shown) that controls all sections.
  • the control unit 250 performs drive control of the compressor 180, switching of the hot water supply operation according to the demand for hot water supply, anti-freezing control based on the value detected by the external radiator outlet water temperature sensor 243, Intercooler water flow rate control based on values detected by the inlet water temperature sensor 240 and the intercooler outlet refrigerant temperature sensor 241, auxiliary gas cooler water flow rate control based on values detected by the inlet water temperature sensor 240 and the auxiliary gas cooler outlet refrigerant temperature sensor 242, Hot water supply temperature control is performed based on the value detected by the hot water supply temperature sensor 244 .
  • the compressor 180 By operating the compressor 180 , the refrigerant returned from the evaporator 171 is sucked into the low-stage compression mechanism 110 through the low-stage suction port 181 .
  • the refrigerant sucked into the low-stage compression mechanism 110 is compressed to an intermediate pressure and discharged from the low-stage discharge port 182 .
  • the refrigerant discharged from the low stage discharge port 182 flows into the intercooler 120 via the intermediate pressure discharge pipe 192 .
  • the refrigerant that has flowed into the intercooler 120 is cooled by heat exchange with water, and is sucked into the high stage compression mechanism 111 through the intermediate pressure suction pipe 191 and the high stage suction port 183 in sequence.
  • the refrigerant sucked into the high-stage compression mechanism 111 is compressed to a high pressure and discharged from the high-stage discharge port 184 .
  • the refrigerant discharged from the high-stage discharge port 184 flows into the gas cooler 130 via the high-pressure discharge pipe 193 .
  • the refrigerant that has flowed into the gas cooler 130 exchanges heat with water and is cooled, and then flows into the auxiliary gas cooler 131 through the high-pressure connecting pipe 194 . Then, it is heat-exchanged with water in the auxiliary gas cooler 131 to be further cooled.
  • the cooled refrigerant is sent to the evaporator 171 via the expansion mechanism 172, is heated by exchanging heat with the air in the showcase, and is sucked into the low-stage compression mechanism 110 again. These refrigerant actions are then repeated while the compressor 180 is operating.
  • water is supplied from the water supply means 140 and flows into the second flow rate adjustment mechanism 231 through the first water pipe 201 and the water supply mechanism 210 in sequence.
  • the water that has flowed into the second flow rate adjustment mechanism 231 is passed through the first water pipe 201 to the auxiliary gas cooler 131 and the third water pipe 203 to the intercooler 120 by the second flow rate adjustment mechanism 231.
  • the flow rate is adjusted and distributed to the inflow channel.
  • the water that has flowed into the auxiliary gas cooler 131 flows into the third flow rate adjustment mechanism 232 after being heated by heat exchange with the refrigerant. Then, the water that has flowed into the third flow rate adjustment mechanism 232 is controlled by the third flow rate adjustment mechanism 232 to flow into the gas cooler 130 through the first water pipe 201 and through the seventh water pipe 207. , and is distributed by further adjusting the flow rate.
  • the water that has flowed into the intercooler 120 flows into the fourth water pipe 204 after being heated by exchanging heat with the refrigerant.
  • the water that has passed through the seventh water pipe 207 and the sixth water pipe 206 merges with the water that has passed through the fourth water pipe 204 and flows into the external radiator 160 .
  • the water that has flowed into the external heat radiator 160 flows into the water supply means 140 after being cooled by, for example, heat exchange with outdoor air. These water movements are repeated while the water supply mechanism 210 is operating.
  • Anti-freezing control starts operation according to a control signal input by turning on a start switch (not shown) of the refrigeration system 100 .
  • the control unit 250 first sets the freezing danger temperature T0 (ST1).
  • the danger of freezing temperature T0 is usually set to about 3 to 5° C., which is a margin to the freezing point.
  • control unit 250 acquires the external radiator outlet water temperature Tout by the external radiator outlet water temperature sensor 243 (ST2).
  • control unit 250 determines whether or not the external radiator outlet water temperature Tout is lower than the freezing danger temperature T0 (ST3).
  • the control unit 250 determines whether the output of the water supply mechanism 210 is maximum ( ST4).
  • control section 250 determines whether or not the hot water supply means 150 side of the first flow rate adjustment mechanism 230 is fully closed (ST5 ).
  • the control section 250 controls to increase the output of the antifreeze heater 220 (ST6). After that, while the control signal is being input (ST7: YES), ST2 to ST7 are repeated.
  • the control section 250 controls the first flow rate adjusting mechanism 230 to decrease the flow rate of the hot water supply means 150 side. (ST8). After that, while the control signal is being input (ST7: YES), ST2 to ST7 are repeated.
  • the controller 250 controls the water supply mechanism 210 to increase the water flow rate (ST9). After that, while the control signal is being input (ST7: YES), ST2 to ST7 are repeated.
  • the control section 250 determines whether or not the anti-freezing heater 220 has an output (ST10).
  • the control section 250 controls to reduce the output of the antifreeze heater 220 (ST11). After that, while the control signal is being input (ST7: YES), ST2 to ST7 are repeated.
  • ST2 to ST7 are repeated while the control signal is being input (ST7: YES).
  • the intercooler water flow rate control starts operation by a control signal that is input when the compressor 180 is activated.
  • the control unit 250 first sets an upper limit value ⁇ Tic_up and a lower limit value ⁇ Tic_low (ST12A).
  • the upper limit value ⁇ Tic_up and the lower limit value ⁇ Tic_low are values for setting how close the intercooler outlet refrigerant temperature Tic is to the incoming water temperature Tin.
  • the upper limit value ⁇ Tic_up is set to approximately 2 to 6K
  • the lower limit value ⁇ Tic_low is set to approximately 0.5 to 4K.
  • the upper limit value ⁇ Tic_up and the lower limit value ⁇ Tic_low may be changed according to the incoming water temperature Tin. For example, if the inlet water temperature Tin is 25°C or higher, the upper limit value ⁇ Tic_up is set to 2K and the lower limit value ⁇ Tic_low is set to 0.5K. When ⁇ Tic_low is set to 2K and the incoming water temperature Tin is less than 20°C, the upper limit value ⁇ Tic_up is set to 6K and the lower limit value ⁇ Tic_low is set to 4K.
  • control unit 250 obtains the incoming water temperature Tin from the incoming water temperature sensor 240 and the intercooler outlet refrigerant temperature Tic from the intercooler outlet refrigerant temperature sensor 241 (ST13).
  • control unit 250 determines whether or not the intercooler outlet refrigerant temperature Tic is lower than the sum of the inlet water temperature Tin and the lower limit value ⁇ Tic_low (ST14).
  • the control unit 250 operates the water supply mechanism 210 to reduce the water flow rate. control (ST15). Thereafter, while the control signal is being input (ST16: YES), ST13 to ST16 are repeated.
  • the control unit 250 adjusts the intercooler outlet refrigerant temperature Tic to the upper limit value of the inlet water temperature Tin. It is determined whether or not it is higher than the value obtained by adding ⁇ Tup (ST17).
  • the control unit 250 causes the water supply mechanism 210 to increase the water flow rate. control (ST18). Thereafter, while the control signal is being input (ST16: YES), ST13 to ST16 are repeated.
  • the auxiliary gas cooler water flow rate control starts operation by a control signal input by starting the compressor 180.
  • the control unit 250 first sets an upper limit value ⁇ Tgc_up and a lower limit value ⁇ Tgc_low (ST12B).
  • the upper limit value ⁇ Tgc_up and the lower limit value ⁇ Tgc_low are values for setting how close the auxiliary gas cooler outlet refrigerant temperature Tgc is to the inlet water temperature Tin.
  • the upper limit value ⁇ Tgc_up is set to the upper limit value ⁇ Tic_up
  • the lower limit value ⁇ Tgc_low is set to the same value as the lower limit value ⁇ Tic_low, but different values may be set.
  • control unit 250 obtains the inlet water temperature Tin from the inlet water temperature sensor 240 and the auxiliary gas cooler outlet refrigerant temperature Tgc from the auxiliary gas cooler outlet refrigerant temperature sensor 242 (ST19).
  • control unit 250 determines whether or not the auxiliary gas cooler outlet refrigerant temperature Tgc is lower than the sum of the inlet water temperature Tin and the lower limit value ⁇ Tgc_low (ST20).
  • the control unit 250 reduces the flow rate on the auxiliary gas cooler 131 side.
  • the second flow rate adjusting mechanism 231 is controlled so as to allow it to flow (ST21). Thereafter, while the control signal is being input (ST22: YES), ST19 to ST22 are repeated.
  • the control unit 250 controls the auxiliary gas cooler outlet refrigerant temperature Tgc to be higher than the water inlet temperature. It is determined whether or not it is higher than the value obtained by adding the upper limit value ⁇ Tgc_up to Tin (ST23).
  • the controller 250 increases the flow rate on the auxiliary gas cooler 131 side.
  • the second flow rate adjustment mechanism 231 is controlled so as to allow it to flow (ST24). Thereafter, while the control signal is being input (ST22: YES), ST19 to ST22 are repeated.
  • Hot water supply temperature control starts operation according to a control signal that is input by turning on a hot water supply switch (not shown).
  • the control unit 250 first sets the set hot water supply temperature Tset and the hysteresis ⁇ Tdiff (ST25).
  • the set hot water supply temperature Tset is usually set to about 40 to 90°C.
  • the hysteresis ⁇ Tdiff is a value set to prevent the hot water supply temperature Tky from becoming unstable, and is usually set to about 1 to 5°C.
  • the controller 250 acquires the hot water supply temperature Tky by the hot water supply temperature sensor 244 (ST26).
  • control unit 250 determines whether or not the hot water supply temperature Tky is lower than the value obtained by subtracting the hysteresis ⁇ Tdiff from the hot water supply set temperature Tset (ST27).
  • the control unit 250 controls the flow rate of the gas cooler 130 side to decrease.
  • the flow rate adjustment mechanism 232 is controlled (ST28). Thereafter, while the control signal is being input (ST29: YES), ST26 to ST29 are repeated.
  • the controller 250 adjusts the hot water supply temperature Tky to the hot water supply set temperature Tset plus the hysteresis ⁇ Tdiff. It is determined whether or not it is higher than the value (ST30).
  • the control unit 250 increases the flow rate on the gas cooler 130 side.
  • the flow control mechanism 232 is controlled (ST31). Thereafter, while the control signal is being input (ST29: YES), ST26 to ST29 are repeated.
  • refrigeration system 100 includes low-stage compression mechanism 110, intercooler 120 that cools the refrigerant discharged from low-stage compression mechanism 110, and high
  • a high-stage compression mechanism 111 and a gas cooler 130 that cools the refrigerant discharged from the high-stage compression mechanism 111 are connected by a refrigerant pipe 135, and a water supply means 140, an intercooler 120, a gas cooler 130, and an external heat dissipation system.
  • the device 160, the hot water supply means 150, and the water supply mechanism 210 are connected by the water pipe 200, and the first flow rate adjustment for adjusting the flow rate of the water flowing into the hot water supply means 150 and the external radiator 160 after passing through the gas cooler 130.
  • a mechanism 230 ;
  • the water pipes 200 include a first water pipe 201 connecting the water supply means 140 and the gas cooler 130, a second water pipe 202 connecting the gas cooler 130 and the hot water supply means 150, A third water pipe 203 branched from the first water pipe 201 and connected to the intercooler 120, a fourth water pipe 204 connecting the intercooler 120 and the external radiator 160, and a third water pipe 204 connecting the external radiator 160 and the water supply means 140.
  • a fifth water pipe 205 and a sixth water pipe 206 branching from the second water pipe 202 and joining the fourth water pipe 204 may be provided.
  • the water heated by the intercooler 120 can flow into the external radiator 160 at all times. Therefore, sensible heat advection and critical flow velocity for avoiding freezing of the external radiator 160 can be ensured at ambient temperatures below freezing.
  • the temperature of the refrigerant that has passed through the intercooler 120 and the temperature of the refrigerant that has passed through the gas cooler 130 can be raised to near the temperature of the water flowing into the intercooler 120 and the gas cooler 130. Allow to cool.
  • the refrigerating apparatus 100 includes a control unit 250 that controls the refrigerating apparatus 100 and an external heat radiating device 160 that is provided in the fifth water pipe 205 and detects the temperature of water that has passed through the external heat radiating device 160 . and a device outlet water temperature sensor 243 , and the control unit 250 may control the water supply mechanism 210 based on the value detected by the external radiator outlet water temperature sensor 243 .
  • the water flow rate can be increased so that the temperature of the water passing through the external radiator 160 does not fall below a predetermined value. Therefore, even when the ambient temperature of the external heat radiator 160 is extremely low, it is possible to ensure the critical flow velocity for avoiding freezing.
  • control unit 250 may control the first flow rate adjustment mechanism 230 based on the value detected by the external radiator outlet water temperature sensor 243 .
  • the refrigerating apparatus 100 includes the anti-freezing heater 220 in the fourth water pipe 204, and the control unit 250 controls the anti-freezing based on the value detected by the external radiator outlet water temperature sensor 243. Heater 220 may be controlled.
  • the water flowing through the external heat radiator 160 can be heated so that the temperature of the water that has passed through the external heat radiator 160 does not fall below a predetermined value. Therefore, sensible heat advection for avoiding freezing can be obtained even when the cooling operation of the refrigeration apparatus 100 is stopped and there is no exhaust heat, or even when the cooling operation is in progress and the amount of exhaust heat is small.
  • the refrigerating apparatus 100 includes an incoming water temperature sensor 240 which is provided in the first water pipe 201 and detects the temperature of water flowing into the intercooler 120 and the gas cooler 130, and an intercooler outlet refrigerant temperature sensor 241 that detects the temperature, and the control unit 250 may control the water supply mechanism 210 based on the values detected by the incoming water temperature sensor 240 and the intercooler outlet refrigerant temperature sensor 241.
  • the temperature difference between the temperature of the water flowing into the intercooler 120 and the coolant that has passed through the intercooler 120 can be adjusted. Therefore, while ensuring the minimum water flow rate that does not cause an increase in the temperature of the refrigerant discharged from the high-stage compression mechanism 111 due to insufficient cooling of the refrigerant in the intercooler 120, the water flow rate unnecessarily increases and the input energy of the water supply mechanism 210 increases. can be suppressed.
  • the refrigerating apparatus 100 includes a second flow rate adjustment mechanism 231 that adjusts the flow rate of water that flows into the gas cooler 130 and the intercooler 120 after passing through the first water pipe 201.
  • An auxiliary gas cooler 131 provided between the flow rate adjustment mechanism 231 and the gas cooler 130 for cooling the refrigerant after passing through the gas cooler 130, and an auxiliary gas cooler outlet refrigerant temperature for detecting the temperature of the refrigerant that has passed through the auxiliary gas cooler 131.
  • a sensor 242 and the control unit 250 may control the second flow rate adjustment mechanism 231 based on the values detected by the incoming water temperature sensor 240 and the auxiliary gas cooler outlet refrigerant temperature sensor 242 .
  • the temperature difference between the temperature of the water flowing into the auxiliary gas cooler 131 and the refrigerant passing through the auxiliary gas cooler 131 can be adjusted. Therefore, while securing the minimum water flow rate that does not cause a decrease in refrigerating capacity due to insufficient cooling of the refrigerant in the auxiliary gas cooler 131, the water flow rate unnecessarily increases and the temperature of the water after passing through the auxiliary gas cooler 131 decreases. can be suppressed. By increasing the temperature of the water after passing through the auxiliary gas cooler 131, the temperature of the hot water can be increased.
  • the refrigeration system 100 includes a seventh water pipe 207 that branches between the auxiliary gas cooler 131 and the gas cooler 130 and merges with the fourth water pipe 204, and a water pipe that passes through the auxiliary gas cooler 131.
  • a third flow rate adjusting mechanism 232 that adjusts the flow rate of water that later flows into the gas cooler 130 and the seventh water pipe 207, and a hot water supply temperature sensor 244 that is provided in the second water pipe 202 and detects the temperature of water to be supplied.
  • the control unit 250 may control the third flow rate adjusting mechanism 232 based on the value detected by the hot water supply temperature sensor 244 .
  • the flow rate of water flowing to the gas cooler 130 can be adjusted. Therefore, the temperature of the water leaving the gas cooler 130, that is, the temperature of the hot water can be arbitrarily adjusted. Further, by reducing the flow rate of water flowing through the gas cooler 130, the temperature of the water to be supplied can be increased up to the temperature of the refrigerant discharged from the high-stage compression mechanism 111 at maximum.
  • the refrigeration system 100 may use carbon dioxide as the refrigerant.
  • Embodiment 1 has been described as an example of the technology disclosed in the present application.
  • the technology in the present disclosure is not limited to this, and can also be applied to embodiments with modifications, replacements, additions, omissions, and the like.
  • Embodiment 1 one compressor having a two-stage compression mechanism including the low-stage compression mechanism 110 and the high-stage compression mechanism 111 is used as the compressor 180. Even if it is used as a side compressor or a high stage side compressor, the same function can be obtained.
  • water supply tank has been described as an example of the water supply means 140
  • the water supply means 140 may be means for supplying water to the first water pipe 201, and may directly supply water from a tap or a well. Therefore, water supply means 140 is not limited to a water supply tank.
  • hot water supply means 150 may be means for discharging water from the second water pipe 202 . Therefore, hot water supply means 150 is not limited to a hot water storage tank.
  • the external heat dissipation device 160 may be any means capable of cooling the water heated by the exhaust heat of the refrigeration system 100. Therefore, the external heat dissipation device 160 is not limited to an air-cooled closed cooling tower.
  • anti-freezing heater 220 may be any means for heating the water flowing into the external radiator 160 . Therefore, antifreeze heater 220 is not limited to a plug heater.
  • the three-way flow rate adjustment valve has been described as an example of the first flow rate adjustment mechanism 230, the second flow rate adjustment mechanism 231 and the third flow rate adjustment mechanism 232, the first flow rate adjustment mechanism 230, the second flow rate adjustment mechanism 231 and the third flow rate adjustment mechanism
  • the 3-flow rate adjustment mechanism 232 may be any means capable of branching water coming from one water pipe into two directions and adjusting the flow rate thereof. Therefore, the first flow rate adjustment mechanism 230, the second flow rate adjustment mechanism 231, and the third flow rate adjustment mechanism 232 are not limited to three-way flow rate adjustment valves.
  • the refrigerant to be used may be any medium for transferring heat in the refrigeration cycle. Therefore, the refrigerant to be used is not limited to carbon dioxide.
  • the present disclosure is applicable to equipment that effectively utilizes water heated by waste heat from a refrigeration system. Specifically, the present disclosure is applicable to hot water supply, floor heating, hot water room heater, heater/dryer, etc. using exhaust heat from a refrigeration system.
  • REFERENCE SIGNS LIST 100 refrigerating device 110 low-stage compression mechanism 111 high-stage compression mechanism 120 intercooler 130 gas cooler 131 auxiliary gas cooler 135 refrigerant pipe 140 water supply means 150 hot water supply means 160 external radiator 170 cooling device 171 evaporator 172 expansion mechanism 180 compressor 181 low-stage Suction port 182 Low stage discharge port 183 High stage suction port 184 High stage discharge port 190 Low pressure suction pipe 191 Intermediate pressure suction pipe 192 Intermediate pressure discharge pipe 193 High pressure discharge pipe 194 High pressure connection pipe 195 Outlet pipe 200 Water pipe 201 First water pipe 202 Second water pipe 203 Third water pipe 204 Fourth water pipe 205 Fifth water pipe 206 Sixth water pipe 207 Seventh water pipe 210 Water supply mechanism 220 Anti-freezing heater 230 First flow rate adjustment mechanism 231 Second flow rate adjustment mechanism 232 Third flow rate adjustment mechanism 240 Inlet water temperature sensor 241 Intercooler outlet refrigerant temperature sensor 242 Auxiliary gas cooler outlet refrigerant temperature sensor 243 External radiator outlet water temperature sensor 24

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

La présente divulgation concerne un appareil de congélation refroidissant un fluide frigorigène par échange de chaleur entre le fluide frigorigène et l'eau. Dans cet appareil de congélation, un mécanisme de compression à bas niveau, un refroidisseur intermédiaire qui refroidit le fluide frigorigène évacué du mécanisme de compression à bas niveau, un mécanisme de compression de niveau élevé qui aspire le fluide frigorigène qui a traversé le refroidisseur intermédiaire, et un refroidisseur de gaz qui refroidit le fluide frigorigène évacué du mécanisme de compression de niveau élevé sont raccordés par une conduite de fluide frigorigène, et un moyen d'alimentation en eau, le refroidisseur intermédiaire, le refroidisseur de gaz, un radiateur externe, un moyen d'alimentation en eau chaude et un mécanisme de distribution d'eau sont raccordés par une canalisation d'eau. Cet appareil de congélation est pourvu d'un premier mécanisme de réglage d'écoulement qui règle le débit d'eau s'écoulant dans le moyen d'alimentation en eau chaude et le radiateur externe après avoir traversé le refroidisseur de gaz.
PCT/JP2022/033074 2021-10-05 2022-09-02 Appareil de congélation WO2023058373A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021163802A JP2023054860A (ja) 2021-10-05 2021-10-05 冷凍装置
JP2021-163802 2021-10-05

Publications (1)

Publication Number Publication Date
WO2023058373A1 true WO2023058373A1 (fr) 2023-04-13

Family

ID=85803356

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/033074 WO2023058373A1 (fr) 2021-10-05 2022-09-02 Appareil de congélation

Country Status (2)

Country Link
JP (1) JP2023054860A (fr)
WO (1) WO2023058373A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011089637A1 (fr) * 2010-01-19 2011-07-28 三菱電機株式会社 Système combiné de climatisation et d'alimentation en eau chaude
US20110289950A1 (en) * 2010-05-28 2011-12-01 Kim Byungsoon Hot water supply apparatus associated with heat pump
JP4947197B2 (ja) 2010-07-15 2012-06-06 ダイキン工業株式会社 ヒートポンプシステム
WO2017221383A1 (fr) * 2016-06-23 2017-12-28 三菱電機株式会社 Système de circulation de milieu thermique
JP2021134954A (ja) * 2020-02-25 2021-09-13 パナソニックＩｐマネジメント株式会社 冷凍装置
JP2021163802A (ja) 2020-03-31 2021-10-11 東レエンジニアリング株式会社 チップ転写方法およびチップ転写装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011089637A1 (fr) * 2010-01-19 2011-07-28 三菱電機株式会社 Système combiné de climatisation et d'alimentation en eau chaude
US20110289950A1 (en) * 2010-05-28 2011-12-01 Kim Byungsoon Hot water supply apparatus associated with heat pump
JP4947197B2 (ja) 2010-07-15 2012-06-06 ダイキン工業株式会社 ヒートポンプシステム
WO2017221383A1 (fr) * 2016-06-23 2017-12-28 三菱電機株式会社 Système de circulation de milieu thermique
JP2021134954A (ja) * 2020-02-25 2021-09-13 パナソニックＩｐマネジメント株式会社 冷凍装置
JP2021163802A (ja) 2020-03-31 2021-10-11 東レエンジニアリング株式会社 チップ転写方法およびチップ転写装置

Also Published As

Publication number Publication date
JP2023054860A (ja) 2023-04-17

Similar Documents

Publication Publication Date Title
CN107014016B (zh) 一种氟泵自然冷却蒸发式冷凝冷水机及其控制方法
US11629891B2 (en) Heat pump system
RU2362096C2 (ru) Удаление мгновенно выделяющегося газа из сборника в системе охлаждения
US10088205B2 (en) Air-conditioning apparatus
CN107014014B (zh) 一种热管自然冷却蒸发式冷凝冷水机及其控制方法
US9869501B2 (en) Air-conditioning apparatus
CN110657597B (zh) 一种氟泵多联制冷系统及其控制方法
EP3872413A1 (fr) Appareil de réfrigération
EP2584285B1 (fr) Dispositif de climatisation à réfrigération
CN116470188A (zh) 一种应用于储能电池的制冷加热控温装置及控温方法
JP2007051841A (ja) 冷凍サイクル装置
CN207963223U (zh) 一种热泵空调系统
WO2023058373A1 (fr) Appareil de congélation
JP5150300B2 (ja) ヒートポンプ式給湯装置
JP7411929B2 (ja) 冷凍装置
JPH10185342A (ja) ヒートポンプ式空気調和機
US20240151438A1 (en) Air-conditioning apparatus and air-conditioning system
JP2003214682A (ja) 比例制御弁を用いたブラインの温度制御装置
JP4929519B2 (ja) チリング式冷凍システム
JP2002162128A (ja) 温水冷媒加熱エアコン
KR20220115839A (ko) 전력 소비량을 감소시키는 전기 절감형 공조기
JP3871207B2 (ja) 吸収式と圧縮式とを組合せた冷凍装置
JP2006161659A (ja) 冷凍サイクル装置
WO2023231110A1 (fr) Système de refroidissement de caloduc à co2 à commutation multimode et son procédé de commande
CN218600034U (zh) 空气源热泵冷热水机组

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22878244

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2022878244

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2022878244

Country of ref document: EP

Effective date: 20240506