WO2021117199A1 - Déshumidificateur - Google Patents

Déshumidificateur Download PDF

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Publication number
WO2021117199A1
WO2021117199A1 PCT/JP2019/048796 JP2019048796W WO2021117199A1 WO 2021117199 A1 WO2021117199 A1 WO 2021117199A1 JP 2019048796 W JP2019048796 W JP 2019048796W WO 2021117199 A1 WO2021117199 A1 WO 2021117199A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
reheater
condenser
air
precooler
Prior art date
Application number
PCT/JP2019/048796
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English (en)
Japanese (ja)
Inventor
拓未 西山
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2021563545A priority Critical patent/JP7308975B2/ja
Priority to CN201980102764.2A priority patent/CN114761107A/zh
Priority to PCT/JP2019/048796 priority patent/WO2021117199A1/fr
Priority to TW109117995A priority patent/TWI765270B/zh
Publication of WO2021117199A1 publication Critical patent/WO2021117199A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours

Definitions

  • the present invention relates to a dehumidifying device.
  • Patent Document 1 a dehumidifying device including a refrigeration cycle circuit and a heat pipe has been proposed.
  • the first refrigerant circulates in the order of the compressor, the condenser, the decompression device, and the evaporator.
  • the second refrigerant circulates in the precooler and the reheater.
  • the precooler is located upwind in the airflow rather than the evaporator.
  • the reheater is located upwind in the airflow rather than the condenser. Since the moist air sent to the evaporator is pre-cooled by the precooler, the relative humidity of the moist air increases, so that the amount of dehumidification by the evaporator can be increased.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a dehumidifying device capable of increasing the amount of dehumidification in the evaporator and suppressing a decrease in the total heat exchange amount during evaporation of the refrigerant. It is to be.
  • the dehumidifying device of the present invention includes a housing having an air passage, a first refrigerant circuit, a second refrigerant circuit, and a blower housed inside the housing.
  • the first refrigerant circuit includes a compressor, a condenser, a decompression device, an evaporator, and a first refrigerant, and is configured such that the first refrigerant flows in the order of the compressor, the condenser, the decompression device, and the evaporator.
  • the second refrigerant circuit includes a precooler, a reheater, and a second refrigerant, and is configured such that the second refrigerant circulates through the precooler and the reheater.
  • the condenser includes a first part and a second part arranged on the outlet side of the condenser with respect to the first part in the flow of the first refrigerant.
  • the second part is arranged on the upstream side of the first part in the flow direction of the air taken in by the blower from the outside to the inside of the housing.
  • the air passage is configured such that air passes through the precooler, the evaporator, the reheater, and the first part in order, and air passes through the precooler, the evaporator, and the second part in order.
  • the dehumidifying amount in the evaporator can be increased by the precooler. Further, since the air passes through the precooler, the evaporator, and the second part in this order, it is possible to suppress a decrease in the total heat exchange amount at the time of evaporation of the refrigerant.
  • FIG. It is a figure which shows schematic structure of the dehumidifying apparatus which concerns on Embodiment 1.
  • FIG. It is a front view which shows typically the structure of the condenser and the reheater of the dehumidifier which concerns on Embodiment 1.
  • FIG. It is a perspective view which shows typically the structure of the precooler and the reheater of the dehumidifier which concerns on Embodiment 1.
  • FIG. It is a front view which shows typically the structure of the precooler and the reheater of the dehumidifier which concerns on Embodiment 1.
  • FIG. It is a front view which shows roughly the structure of the precooler and the reheater of the modification 1 of the dehumidifying device which concerns on Embodiment 1.
  • FIG. 1 It is a perspective view which shows typically the structure of the precooler and the reheater of the modification 2 of the dehumidifying device which concerns on Embodiment 1.
  • FIG. It is a front view which shows roughly the structure of the precooler and the reheater of the modification 2 of the dehumidifying device which concerns on Embodiment 1.
  • FIG. It is a front view which shows roughly the structure of the precooler and the reheater of the modification 3 of the dehumidifying device which concerns on Embodiment 1.
  • FIG. It is a front view which shows typically the structure of the condenser and the reheater of the modification 4 of the dehumidifying apparatus which concerns on Embodiment 1.
  • the dehumidifying device 1 includes a first refrigerant circuit C1 including a compressor 2, a condenser 3, a depressurizing device 4, and an evaporator 5, a blower 6, and a precooler 7.
  • a second refrigerant circuit C2 including the reheater 8 and a housing 20 are provided.
  • the first refrigerant circuit C1, the second refrigerant circuit C2, and the blower 6 are housed inside the housing 20.
  • the housing 20 faces an external space (indoor space) to be dehumidified by the dehumidifying device 1.
  • the first refrigerant circuit C1 includes a compressor 2, a condenser 3, a decompression device 4, an evaporator 5, and a first refrigerant.
  • the first refrigerant circuit C1 is configured such that the first refrigerant flows in the order of the compressor 2, the condenser 3, the decompression device 4, and the evaporator 5.
  • the first refrigerant circuit C1 is configured by connecting the compressor 2, the condenser 3, the decompression device 4, and the evaporator 5 in this order via piping.
  • the first refrigerant circulates in the first refrigerant circuit C1 through the piping in the order of the compressor 2, the condenser 3, the decompression device 4, and the evaporator 5.
  • the solid line arrow in FIG. 1 indicates the flow of the first refrigerant in the first refrigerant circuit C1.
  • the compressor 2 is configured to compress the first refrigerant. Specifically, the compressor 2 is configured to suck low-pressure refrigerant from the suction port, compress it, and discharge it as high-pressure refrigerant from the discharge port.
  • the compressor 2 may have a variable discharge capacity of the refrigerant.
  • the compressor 2 may be an inverter compressor. When the compressor 2 has a variable discharge capacity of the first refrigerant, the circulation amount of the first refrigerant in the dehumidifying device 1 can be controlled by adjusting the discharge capacity of the compressor 2. It becomes.
  • the condenser 3 is configured to condense and cool the first refrigerant boosted by the compressor 2.
  • the condenser 3 is a heat exchanger that exchanges heat between the first refrigerant and air.
  • the condenser 3 has an inlet and an outlet for the first refrigerant and an inlet and an outlet for air.
  • the inlet of the first refrigerant of the condenser 3 is arranged on the upper side, and the outlet is arranged on the lower side.
  • the inlet of the first refrigerant of the condenser 3 is connected to the discharge port of the compressor 2 by a pipe.
  • the decompression device 4 is configured to depressurize and expand the first refrigerant cooled by the condenser 3.
  • the pressure reducing device 4 is, for example, an expansion valve.
  • This expansion valve may be an electronic expansion valve.
  • the electronic expansion valve may use a coil.
  • the pressure reducing device 4 is not limited to the expansion valve, and may be a capillary tube.
  • the decompression device 4 is connected to each of the refrigerant outlet of the condenser 3 and the refrigerant inlet of the evaporator 5 via a pipe.
  • the evaporator 5 is configured to evaporate the refrigerant by absorbing heat from the first refrigerant that has been decompressed and expanded by the decompression device 4.
  • the evaporator 5 is a heat exchanger that exchanges heat between the first refrigerant and air.
  • the evaporator 5 has an inlet and an outlet for the first refrigerant, and an inlet and an outlet for air.
  • the inlet of the first refrigerant of the evaporator 5 is arranged on the upper side, and the outlet is arranged on the lower side.
  • the outlet of the first refrigerant of the evaporator 5 is connected to the suction port of the compressor 2 via a pipe.
  • the evaporator 5 is arranged upstream of the condenser 3 in the air flow generated by the blower 6. That is, the evaporator 5 is arranged on the windward side of the condenser 3.
  • the blower 6 is configured to blow air.
  • the blower 6 is configured to take in air from the outside of the housing 20 to the inside and blow it to the condenser 3 and the evaporator 5.
  • the blower 6 is configured to take in air from the external space (indoor space) into the housing 20, pass through the evaporator 5 and the condenser 3, and then discharge the air to the outside of the housing 20.
  • the blower 6 has a shaft 6a and a fan 6b.
  • the fan 6b is configured to rotate about a shaft 6a.
  • air is taken into the housing 20 from the room as indicated by the arrow A in the figure.
  • the air taken into the housing 20 is discharged to the external space (indoor space). In this way, the air circulates in the external space (indoor space) via the dehumidifying device 1.
  • the blower 6 is arranged downstream of the condenser 3 in the air flow direction.
  • the blower 6 may be arranged between the condenser 3 and the evaporator 5 in the air flow direction. Further, the blower 6 may be arranged upstream of the evaporator 5 in the air flow direction.
  • the second refrigerant circuit C2 includes a precooler 7, a reheater 8, and a second refrigerant.
  • the second refrigerant circuit C2 is configured such that the second refrigerant circulates in the precooler 7 and the reheater 8.
  • the second refrigerant circuit C2 is configured by connecting the precooler 7 and the reheater 8 via a pipe.
  • the second refrigerant circuit C2 may be a natural circulation circuit.
  • the second refrigerant circuit C2 may be a heat pipe.
  • the broken line arrow in FIG. 1 indicates the flow of the second refrigerant in the second refrigerant circuit C2.
  • the precooler 7 is configured to pre-cool the air taken in by the blower 6 from the outside to the inside of the housing 20 before flowing into the evaporator 5.
  • the precooler 7 is configured to absorb heat from air to the second refrigerant to evaporate the second refrigerant.
  • the precooler 7 is a heat exchanger that exchanges heat between the second refrigerant and air.
  • the precooler 7 has an inlet and an outlet for the second refrigerant and an inlet and an outlet for air. Each of the inlet and outlet of the second refrigerant of the precooler 7 is connected to each of the outlet and inlet of the second refrigerant of the reheater 8 via a pipe.
  • the precooler 7 is arranged upstream of the reheater 8 in the air flow generated by the blower 6. Further, the precooler 7 is arranged upstream of the evaporator 5 in the air flow generated by the blower 6. That is, the precooler 7 is arranged on the windward side of the evaporator 5.
  • the reheater 8 is configured to reheat the air taken in by the blower 6 from the outside to the inside of the housing 20 before flowing into the condenser 3.
  • the reheater 8 is configured to heat the air by condensing the second refrigerant evaporated by the precooler 7.
  • the reheater 8 is a heat exchanger that exchanges heat between the second refrigerant and air.
  • the reheater 8 has an inlet and an outlet for the second refrigerant and an inlet and an outlet for air.
  • the reheater 8 is arranged between the condenser 3 and the evaporator 5.
  • the reheater 8 is arranged upstream of the condenser 3 in the air flow generated by the blower 6. That is, the reheater 8 is arranged on the windward side of the condenser 3.
  • the outlet of the second refrigerant of the reheater 8 is arranged at a height higher than the inlet of the second refrigerant of the precooler 7.
  • the outlet of the second refrigerant of the reheater 8 is preferably arranged at a height above the inlet of the second refrigerant of the precooler 7.
  • the housing 20 has an air passage FP.
  • air passes through the precooler 7, the evaporator 5, the reheater 8, and the first part 31 in this order, and the air passes through the precooler 7, the evaporator 5, and the second part 32 in this order.
  • the dehumidifying device 4 may be arranged in the air passage FP.
  • the housing 20 is provided with a suction port 21 and an outlet 22.
  • the suction port 21 is for letting air into the inside of the housing 20 from the external space (indoor space) to be dehumidified.
  • the suction port 21 communicates with the air passage FP.
  • the suction port 21 is arranged on the upstream side of the air inlet of the precooler 7 in the air passage FP in the air flow direction of the air passage FP.
  • the air outlet 22 is for blowing air from the inside of the housing 20 to the external space.
  • the housing 20 has a back surface 20a and a front surface 20b.
  • a suction port 21 is provided on the back surface 20a.
  • the suction port 21 is configured to suck air into the air passage FP.
  • the first refrigerant and the second refrigerant may be the same. Further, the first refrigerant and the second refrigerant may be different from each other.
  • the first refrigerant may be a chlorofluorocarbon-based refrigerant
  • the second refrigerant may be a hydrocarbon (HC) -based refrigerant. Since the first refrigerant and the second refrigerant are different, it is possible to reduce the cost and reduce the GWP (global warming potential) as compared with the case where both the first refrigerant and the second refrigerant are chlorofluorocarbon-based refrigerants. ..
  • both the first refrigerant and the second refrigerant are fluorocarbon-based refrigerants
  • the fluorocarbon-based refrigerant is subject to European Freon gas (F-Gas) regulations, so it is difficult to obtain and the price tends to rise. Therefore, the dehumidifying device 1 becomes expensive.
  • F-Gas European Freon gas
  • HC hydrocarbon
  • the amount of the refrigerant is subject to regulation in Europe because the risk of flammability increases as the encapsulation amount increases.
  • An inexpensive hydrocarbon (HC) -based refrigerant such as R290 may be used as the first refrigerant, and an expensive chlorofluorocarbon-based refrigerant such as R1234f may be used as the second refrigerant.
  • the first refrigerant and the second refrigerant may be combined depending on the performance, cost, and safety.
  • the configuration of the condenser 3 of the present embodiment will be described in detail with reference to FIGS. 1 and 2.
  • the condenser 3 includes a first part 31 and a second part 32.
  • Part 1 31 faces the reheater 8.
  • the first part 31 is arranged so as to overlap the reheater 8 in the air flow direction.
  • the first part 31 is arranged on the downstream side of the reheater 8 in the air flow direction.
  • the first part 31 is arranged so that the air that has passed through the reheater 8 flows directly to the first part 31.
  • Part 2 32 faces the evaporator 5.
  • the second part 32 is arranged so as to overlap the evaporator 5 in the air flow direction.
  • the second part 32 is arranged on the downstream side of the evaporator 5 in the air flow direction.
  • the second part 32 is arranged so that the air that has passed through the evaporator 5 flows directly to the second part 32.
  • the reheater 8 is not arranged between the second part 32 and the evaporator 5 in the air flow direction.
  • the second part 32 is arranged on the outlet side of the condenser 3 with respect to the first part 31 in the flow of the first refrigerant.
  • the second part 32 is arranged on the upstream side of the first part 31 in the flow direction of the air taken in by the blower 6 from the outside to the inside of the housing 20.
  • the second part 32 is arranged on the upstream side of the reheater 8 in the air flow direction.
  • the condenser 3 has a plurality of fins 3F and a tube 3P penetrating the plurality of fins 3F.
  • the plurality of fins 3F are attached to the outside of the pipe 3P.
  • the pipe 3P is configured so that the first refrigerant flows inside the pipe 3P.
  • the tubes are arranged in two rows.
  • the precooler 7 and the reheater 8 are connected to each other by two pipes.
  • Each of the precooler 7 and the reheater 8 has a plurality of fins and a tube penetrating the plurality of fins. The fins are attached to the outside of the tube.
  • the pipe is configured so that the second refrigerant flows inside the pipe.
  • the tubes are arranged in a row.
  • the pipes are not limited to one row.
  • Each of the two pipes is located on the same side of each of the plurality of fins of the precooler 7 and the reheater 8. That is, the outlet and the inlet of the second refrigerant in each of the precooler 7 and the reheater 8 are arranged on the same side with respect to the plurality of fins.
  • the tubes of the precooler 7 and the reheater 8 are arranged in a staggered state with each other. That is, it is preferable that the tubes of the precooler 7 and the reheater 8 are arranged so that their height positions deviate from each other.
  • the tubes are arranged in two rows, but in the condenser 3, the tubes are not limited to the two rows. Further, in each of the precooler 7 and the reheater 8, the pipes are arranged in one row, but in each of the precooler 7 and the reheater 8, the pipes are not limited to one row. Further, when the pipes are installed in multiple rows in the condenser 3, it is preferable that the flow of the refrigerant moving through the multiple rows of pipes is countercurrent with the flow of air passing through the condenser 3. Further, the number of stages of each tube of the condenser 3, the precooler 7, and the reheater 8 is not limited.
  • the second refrigerant circulates only by the driving force due to the temperature difference. Therefore, in the precooler 7, it is preferable that the second refrigerant flows from the lower side to the higher side in the direction of gravity. Further, in the reheater 8, it is preferable that the second refrigerant flows from the higher side to the lower side in the direction of gravity.
  • the modified example of the dehumidifying device according to the present embodiment has the same configuration, operation, and effect as the dehumidifying device according to the above-described present embodiment.
  • the tubes of the precooler 7 and the reheater 8 of the modified example 1 of the dehumidifier according to the present embodiment are arranged in a staggered state with each other. No tube is arranged at the bottom of the reheater 8.
  • the reheater 8 is configured so that the second refrigerant does not flow at a position overlapping the second part 32 in the air flow direction.
  • the precooler 7 and the reheater 8 of the modification 2 of the dehumidifier according to the present embodiment are connected to each other by two pipes.
  • Each of the two pipes is located on a different side of each of the plurality of fins of the precooler 7 and the reheater 8. That is, the outlet and the inlet of the second refrigerant in each of the precooler 7 and the reheater 8 are arranged on different sides with respect to the plurality of fins.
  • the tubes of the precooler 7 and the reheater 8 of the modification 2 of the dehumidifier according to the present embodiment are arranged in a staggered state with each other. No tube is arranged at the bottom of the reheater 8.
  • the reheater 8 is configured so that the second refrigerant does not flow at a position overlapping the second part 32 in the air flow direction.
  • the precooler 7 and the reheater 8 of the modification 3 of the dehumidifier according to the present embodiment are the precooler 7 and the reheater 8 of the modification 2 of the dehumidifier according to the present embodiment.
  • the arrangement of the tubes of the precooler 7 is different from that of the heater 8. Specifically, in the modification 3 of the dehumidifier according to the present embodiment, the pipe of the precooler 7 is arranged lower than the modification 2 of the dehumidifier according to the present embodiment.
  • the condenser 3 and the reheater 8 of the modification 4 of the dehumidifier according to the present embodiment are integrally configured. Specifically, each of the plurality of fins 3F of the condenser 3 and each of the plurality of fins of the reheater 8 are integrally formed.
  • the condenser 3 and the reheater 8 of the modification 5 of the dehumidifier according to the present embodiment are integrally configured. Specifically, each of the plurality of fins 3F of the condenser 3 and each of the plurality of fins of the reheater 8 are integrally formed.
  • a slit SP is provided between the condenser 3 and the reheater 8. Specifically, a slit SP is provided between each of the plurality of fins 3F of the condenser 3 and the plurality of fins of the reheater 8. Further, slits SP are provided between each row of the tubes of the condenser 3.
  • the superheated first refrigerant discharged from the compressor 2 flows into the condenser 3 arranged in the air passage FP.
  • the superheated gas state first refrigerant that has flowed into the condenser 3 is taken into the air passage FP from the external space through the suction port 21, and the air and heat that have passed through the precooler 7, the evaporator 5, and the reheater 8 in this order. It is replaced and becomes supercooled.
  • the supercooled first refrigerant flowing out of the condenser 3 is decompressed by passing through the decompression device 4, becomes a gas-liquid two-phase state, and then flows into the evaporator 5 arranged in the air passage FP. ..
  • the gas-liquid two-phase state first refrigerant that has flowed into the evaporator 5 is taken into the air passage FP from the external space through the suction port 21, and is heat-exchanged with the air having a high relative humidity cooled by the precooler 7. As a result, it is heated and becomes a superheated gas state.
  • the first refrigerant in the superheated gas state is sucked into the compressor 2, compressed by the compressor 2, and discharged again. In this way, the first refrigerant circulates in the first refrigerant circuit C1.
  • the second refrigerant in the precooler 7 evaporates by heat exchange with the air taken into the air passage FP.
  • the second refrigerant in the gas-liquid two-phase state or the gas state flows upward in the precooler 7 and then flows to the reheater 8 via the connecting pipe due to the pressure difference.
  • the second refrigerant that has flowed into the reheater 8 is condensed by exchanging heat with the air that has passed through the precooler 7 and the evaporator 5 in this order.
  • the gas-liquid two-phase state or the liquid second refrigerant flows downward in the reheater 8 and then flows into the precooler 7 by gravity. In this way, the second refrigerant circulates in the second refrigerant circuit C2.
  • the air taken into the air passage FP is cooled by exchanging heat with the second refrigerant in the precooler 7.
  • the air cooled in the precooler 7 is cooled to a temperature equal to or lower than the dew point of the air by exchanging heat with the first refrigerant in the evaporator 5.
  • the air is dehumidified in the evaporator 5. Since the air sent to the evaporator 5 is pre-cooled by the precooler 7, the relative density of the moist air becomes high, so that the amount of dehumidification by the evaporator 5 can be increased.
  • the air cooled in the evaporator 5 is heated by exchanging heat with the second refrigerant in the reheater 8.
  • the air heated in the reheater 8 is further heated by exchanging heat with the first refrigerant in the first part 31 of the condenser 3.
  • the air cooled in the evaporator 5 is not exchanged with the second refrigerant in the reheater 8, but is exchanged with the first refrigerant in the second part 32 of the condenser 3. That is, in the second part 32 of the condenser 3, the second refrigerant and the air cooled in the evaporator 5 directly exchange heat.
  • a signal is sent from a control unit (not shown) based on the detection results of a temperature detecting means (for example, suction temperature, discharge temperature, heat exchanger temperature, air suction temperature / humidity, etc.) (not shown), and the frequency of the compressor 2 is reached.
  • a temperature detecting means for example, suction temperature, discharge temperature, heat exchanger temperature, air suction temperature / humidity, etc.
  • the compressor 2 is controlled by ON / OFF switching in the case of constant speed, and is controlled by the frequency in the case of inverter control.
  • the throttle mechanism of the pressure reducing device 4 is an expansion valve whose throttle can be changed by a coil or the like, the temperature detection means provided near the intermediate portion of the heat exchanger on the evaporation side and the temperature detection provided in the compressor suction portion.
  • the expansion valve is controlled based on the temperature difference from the means.
  • a discharge temperature detecting means is further provided, and the throttle of the expansion valve is controlled based on the temperature difference between the detection result and the preset target discharge temperature. May be good.
  • the user's setting for example, weak wind mode or strong wind mode
  • the fan 6b may be prioritized. Even if the fan 6b is operated at a fan rotation speed preset according to the operation mode (rated (high rotation speed) or intermediate (low rotation speed)) set from the difference between the set humidity and the indoor humidity. Good. Further, since the temperature in the room tends to rise due to the characteristics of the dehumidifying device 1, the frequency of the compressor 2 may be reduced or stopped when the room temperature becomes equal to or higher than a preset temperature.
  • a temperature detecting means (not shown) is provided in the compressor discharging portion, the discharge temperature of the refrigerant is detected, and the temperature difference between the detection result of the temperature detecting means and the discharging temperature of the compressor 2 set in advance is not shown.
  • a signal may be sent to the control unit to adjust the compressor rotation speed, the fan rotation speed, or the opening degree of the expansion valve. This makes it possible to prevent the temperature from exceeding the heat resistant temperature.
  • the dehumidifying devices of Comparative Examples 1 to 3 are mainly different in that the second part 32 of the condenser 3 of the present embodiment is not provided.
  • the condenser 3 faces the reheater 8. Air passes through the reheater 8 and flows into the condenser 3.
  • the moist air sent to the evaporator 5 is pre-cooled by the precooler 7, so that the relative humidity of the moist air becomes high. Therefore, the precooler 7 can increase the amount of dehumidification in the evaporator 5. Further, air passes through the precooler 7, the evaporator 5, and the second part 32 of the condenser 3 in this order. Therefore, heat exchange is performed between the low-temperature air that has passed through the evaporator 5 and the first refrigerant that flows through the second portion 32 of the condenser 3. As a result, the temperature of the first refrigerant flowing through the second part 32 of the condenser 3 can be lowered.
  • the enthalpy difference in the condenser 3 can be increased, the evaporation capacity can be improved. Therefore, it is possible to suppress a decrease in the total heat exchange amount when the refrigerant evaporates. Therefore, the amount of dehumidification can be increased.
  • the dehumidifying amount it is an index showing the dehumidifying performance of the dehumidifying device 1, and the EF (Energy Factor) value (L / kWh) indicating the dehumidifying amount L per 1 kWh can be improved.
  • the air that has passed through the outlet of the evaporator 5 flows to the second part 32 of the condenser 3.
  • the temperature of the air at the outlet of the evaporator 5 is the lowest in the dehumidifying device 1 according to the present embodiment. Therefore, heat exchange can be performed between the air at the outlet of the evaporator 5, which has the lowest temperature, and the second refrigerant flowing through the second part 32 of the condenser 3. It is possible to further suppress a decrease in the total heat exchange amount when the refrigerant evaporates.
  • the second part 32 of the condenser 3 is arranged on the upstream side of the reheater 8 in the air flow direction. Therefore, heat exchange can be effectively performed between the low-temperature air that has passed through the evaporator 5 and the first refrigerant that flows through the second portion 32 of the condenser 3.
  • the condenser 3 includes a plurality of fins 3F and a tube 3P. Therefore, the condensing ability can be improved by the plurality of fins 3F.
  • the outlet of the second refrigerant of the reheater 8 is arranged at a height higher than the inlet of the second refrigerant of the precooler 7. Therefore, the loss due to the position head of the second refrigerant can be reduced.
  • the tubes of the precooler 7 and the reheater 8 are arranged in a staggered state with each other. Therefore, the precooler 7 can be made lower than the reheater 8 in the direction of gravity. Therefore, it is possible to facilitate the flow of the second refrigerant from the reheater 8 to the precooler 7.
  • the reheater 8 is configured so that the second refrigerant does not flow at a position overlapping the second part 32 of the condenser 3 in the air flow direction. There is. Therefore, at the position where the second refrigerant 32 overlaps the second part 32 of the condenser 3 in the flow direction of the air, the second refrigerant is not heated in the reheater 8, so that the low temperature air that has passed through the evaporator 5 and the second condenser 3 Heat exchange can be performed with the unit 32.
  • the condenser 3 and the reheater 8 are integrally configured, but the second part 32 of the condenser 3 is not provided.
  • the condenser 3 and the reheater 8 are integrally configured. Therefore, the number of components of the dehumidifying device 1 can be reduced. As a result, the manufacturing time of the dehumidifying device 1 can be reduced. Further, since the condenser 3 and the reheater 8 are integrally configured, the condenser 3 and the reheater 8 can be miniaturized.
  • a slit SP is provided between the condenser 3 and the reheater 8, but the second part 32 of the condenser 3 is not provided.
  • the slit SP is provided between the condenser 3 and the reheater 8. Therefore, the slit can block the heat conduction between the condenser 3 and the reheater 8. Specifically, when the dehumidifying device 1 is operating, the temperature of the first refrigerant flowing through the condenser 3 is different from the temperature of the second refrigerant flowing through the reheater 8. The slit SP can suppress heat conduction between the first refrigerant and the second refrigerant via the fins of the condenser 3 and the reheater 8.
  • the dehumidifying device 1 according to the second embodiment is the first embodiment in that the condenser 3 includes the first condensing part 3a, the second condensing part 3b, and the third condensing part 3c. It is mainly different from the dehumidifying device 1. Further, the dehumidifying device 1 according to the second embodiment is mainly the dehumidifying device 1 according to the first embodiment in that the air passage FP of the housing 20 includes the first path FP1 and the second path FP2. Is different.
  • the condenser 3 includes a first condensing part 3a, a second condensing part 3b, and a third condensing part 3c.
  • the first condensing part 3a includes a first part 31 and a second part 32.
  • the first condensing section 3a is configured so that the first refrigerant in the supercooled state flows.
  • the first condensing unit 3a may have a region in which the first refrigerant in the supercooled state flows, and may have a region in which the first refrigerant in the supercooled state and the gas-liquid two-phase state flows.
  • the second condensing portion 3b is configured so that the refrigerant in the superheated gas state flows.
  • the second condensing portion 3b may have a region in which the first refrigerant in the superheated gas state flows, and may have a region in which the first refrigerant in the superheated gas state and the gas-liquid two-phase state flows.
  • the third condensing section 3c is arranged between the first condensing section 3a and the second condensing section 3b in the first refrigerant circuit C1.
  • the third condensing section 3c is configured so that a gas-liquid two-phase state refrigerant flows.
  • the first refrigerant flows in the order of the second condensing section 3b, the third condensing section 3c, and the first condensing section 3a.
  • Each of the first condensing section 3a, the second condensing section 3b, and the third condensing section 3c has a refrigerant inlet and a refrigerant outlet.
  • the refrigerant inlet of the second condensing portion 3b is connected to the discharge port of the compressor 2 via a pipe.
  • the refrigerant inlet of the third condensing section 3c is connected to the refrigerant outlet of the second condensing section 3b.
  • the refrigerant inlet of the first condensing section 3a is connected to the refrigerant outlet of the third condensing section 3c.
  • the refrigerant outlet of the first condensing unit 3a is connected to the decompression device 4 via a pipe.
  • the housing 20 includes a partition portion 11.
  • the air path FP includes a first path FP1 and a second path FP2.
  • the second road FP2 is partitioned from the first road FP1.
  • the partition portion 11 is configured to partition the first road FP1 and the second road FP2.
  • Each of the first road FP1 and the second road FP2 is defined by the housing 20 and the partition portion 11. That is, inside the housing 20, two air passages (air flow paths) of the first path FP1 and the second path FP2 are provided.
  • the suction port 21 includes a first suction port 21a and a second suction port 21b.
  • the first suction port 21a communicates with the first road FP1.
  • the second suction port 21b communicates with the second road FP2.
  • the first suction port 21a is arranged on the upstream side of the air inlet of the precooler 7 in the first path FP1 in the air flow direction of the first path FP1.
  • the second suction port 21b is arranged on the upstream side of the air inlet of the second condensing portion 3b in the second path FP2 in the air flow direction of the second path FP2.
  • a first condensing unit 3a, a third condensing unit 3c, an evaporator 5, a precooler 7, and a reheater 8 are arranged in the first path FP1.
  • the air taken in by the blower 6 from the outside to the inside of the housing 20 passes through the precooler 7, the evaporator 5, the reheater 8, the first condensing section 3a, and the third condensing section 3c in this order. It is configured to do.
  • the air taken in from the outside of the housing 20 to the inside by the fan 6b rotating around the shaft 6a is recooled by the precooler 7, the evaporator 5, and re-cooled.
  • the first path FP1 is configured such that air passes through the first condensed portion 3a and then passes through the third condensed portion 3c.
  • the third condensing unit 3c is arranged leeward of the first condensing unit 3a, the evaporator 5, the precooler 7, and the reheater 8 in the air flow direction.
  • the second condensing portion 3b is arranged in the second road FP2.
  • the second path FP2 is configured such that the air taken in by the blower 6 from the outside to the inside of the housing 20 passes through the second condensing portion 3b.
  • the air taken in from the outside of the housing 20 to the inside by rotating the fan 6b around the shaft 6a passes through the second condensing portion 3b.
  • the second path FP2 is configured so that air passes through the second condensing portion 3b.
  • the second condensed portion 3b is arranged above the third condensed portion 3c.
  • the total height of the second condensing section 3b and the third condensing section 3c is higher than the height of the first condensing section 3a, the evaporator 5, the precooler 7, and the reheater 8.
  • the air in the first road FP1 and the air in the second road FP2 flow in parallel with each other and flow in the same direction.
  • the space that defines the first road FP1 does not have to be completely separated from the space that defines the second road FP2.
  • the space defining the first path FP1 is connected to the space defining the second path FP2 downstream of the first condensing portion 3a in the air flow direction in the first path FP1. There is.
  • One end (upstream end) located on the upstream side of the partition portion 11 in the air flow direction in the first path FP1 is arranged on the upstream side of the air outlet of the precooler 7.
  • the other end (downstream end) located on the downstream side of the partition portion 11 in the air flow direction in the second path FP2 is arranged at the same position as the air outlet of the reheater 8 or on the downstream side of this air outlet.
  • the partition portion 11 is formed in a flat plate shape, for example.
  • the partition portion 11 is fixed inside the housing 20.
  • the dehumidifying device 4 may be arranged in the machine room. Next, with reference to FIG. 14, the operation of the dehumidifying device 1 according to the present embodiment during the dehumidifying operation will be described.
  • the superheated first refrigerant discharged from the compressor 2 flows into the second condensing portion 3b arranged in the second path FP2.
  • the superheated gas state first refrigerant that has flowed into the second condensing portion 3b is cooled by heat exchange with the air taken into the second path FP2 from the external space through the second suction port 21b, and is cooled into a gas-liquid two-phase. It becomes a state.
  • the gas-liquid two-phase state first refrigerant flowing out of the second condensing section 3b flows into the third condensing section 3c arranged in the first path FP1.
  • the gas-liquid two-phase state first refrigerant that has flowed into the third condensing portion 3c is taken into the first path FP1 from the external space through the first suction port 21a, and is taken into the precooler 7, the evaporator 5, and the reheater 8. , Further condensing by heat exchange with the air that has passed through the first condensing portion 3a in order.
  • the gas-liquid two-phase state first refrigerant flowing out of the third condensing section 3c flows into the first condensing section 3a arranged in the first path FP1.
  • the gas-liquid two-phase state first refrigerant that has flowed into the first condensing portion 3a is taken into the first path FP1 from the external space through the first suction port 21a, and is taken into the first path FP1 and is taken into the precooler 7, the evaporator 5, and the reheater 8. It becomes a supercooled state by exchanging heat with the air that has passed through in order.
  • the supercooled first refrigerant flowing out of the first condensing unit 3a is depressurized by passing through the decompression device 4 arranged in the machine chamber, becomes a gas-liquid two-phase state, and then flows into the evaporator 5. ..
  • the gas-liquid two-phase state first refrigerant that has flowed into the evaporator 5 is taken into the first path FP1 from the external space through the first suction port 21a, and is cooled by the precooler 7 with air having a high relative humidity. By exchanging heat, it is heated and becomes a superheated gas state.
  • the first refrigerant in the superheated gas state is sucked into the compressor 2, compressed by the compressor 2, and discharged again. In this way, the first refrigerant circulates in the first refrigerant circuit C1.
  • the second refrigerant in the precooler 7 evaporates by heat exchange with the air taken into the first path FP1.
  • the second refrigerant in the gas-liquid two-phase state or the gas state flows upward in the precooler 7 and then flows to the reheater 8 via the connecting pipe due to the pressure difference.
  • the second refrigerant that has flowed into the reheater 8 is condensed by exchanging heat with the air that has passed through the precooler 7 and the evaporator 5 in this order.
  • the gas-liquid two-phase state or liquid state second refrigerant flows downward in the reheater 8 and then flows into the precooler 7 by gravity. In this way, the second refrigerant circulates in the second refrigerant circuit C2.
  • the air taken into the first path FP1 is cooled by exchanging heat with the second refrigerant in the precooler 7.
  • the air cooled in the precooler 7 is cooled to a temperature equal to or lower than the dew point of the air by exchanging heat with the first refrigerant in the evaporator 5.
  • the air is dehumidified in the evaporator 5. Since the air sent to the evaporator 5 is pre-cooled by the precooler 7, the relative density of the moist air becomes high, so that the amount of dehumidification by the evaporator 5 can be increased.
  • the air cooled in the evaporator 5 is heated by exchanging heat with the second refrigerant in the reheater 8.
  • the air heated in the reheater 8 is further heated by exchanging heat with the first refrigerant in the first part 31 of the first condensing part 3a.
  • the air heated in the first condensing section 3a is further heated by exchanging heat with the first refrigerant in the third condensing section 3c.
  • the air taken into the second path FP2 is heated by exchanging heat with the first refrigerant in the second condensing section 3b.
  • the air cooled in the evaporator 5 is not heat-exchanged with the second refrigerant in the reheater 8, but is heat-exchanged with the first refrigerant in the second part 32 of the first condensing part 3a. That is, in the second part 32 of the first condensing part 3a, the second refrigerant and the air cooled in the evaporator 5 directly exchange heat.
  • the condensing performance in the condenser 3 can be improved by the second path FP2, so that the EF value can be improved. That is, the air taken into the housing 20 flows through the second path FP2 and is heat-exchanged in the second condensing portion 3b. Therefore, the air volume of the air flowing through the condenser 3 can be increased. Further, it is possible to allow air having a temperature lower than the temperature of the air flowing through the reheater 8 to the first condensing section 3a to flow to the second condensing section 3b.
  • the condensing capacity of the condenser 3 can be improved.
  • the condensation temperature can be reduced by improving the condensation capacity of the condenser 3.
  • the compression ratio of the compressor 2 can be reduced.
  • the input of the compressor 2 can be reduced by reducing the compression ratio of the compressor 2.
  • the EF value can be improved by reducing the input of the compressor 2.
  • the first path FP1 is configured such that air passes through the first condensed portion 3a and then passes through the third condensed portion 3c.
  • the first condensed portion 3a through which the supercooled refrigerant flows has the lowest refrigerant temperature among the first condensed portion 3a, the second condensed portion 3b, and the third condensed portion 3c. Therefore, the temperature difference between the air temperature at the time of heat dissipation of the reheater 8 and the first refrigerant of the first condensing portion 3a becomes close to each other, so that the amount of heat received by the first condensing portion 3a becomes smaller. As a result, it is possible to suppress a decrease in the condensation performance due to heat dissipation of the reheater 8.
  • the refrigerant temperature of the third condensing section 3c is higher than the refrigerant temperature of the first condensing section 3a, it is possible to exchange heat with the air whose temperature has increased by heat exchange in the first condensing section 3a. As a result, the condensing performance can be ensured by the third condensing unit 3c, so that the condensing performance of the condenser 3 can be improved.
  • 1 dehumidifier 2 compressor, 3 condenser, 3a 1st condenser, 3b 2nd condenser, 3c 3rd condenser, 3F fin, 3P tube, 4 decompression device, 5 evaporator, 6 blower, 6a shaft, 6b fan, 7 precooler, 8 reheater, 11 partition, 20 housing, 21 suction port, 21a 1st suction port, 21b 2nd suction port, 22 outlet, 31 1st part, 32 2nd part , C1 1st refrigerant circuit, C2 2nd refrigerant circuit, FP air passage, FP1 1st road, FP2 2nd road, SP slit.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Drying Of Gases (AREA)

Abstract

Un déshumidificateur (1) comprend un boîtier (20), un premier circuit de fluide frigorigène (C1), un second circuit de fluide frigorigène (C2), et un ventilateur (6). Le premier circuit de fluide frigorigène (C1) comprend un compresseur (2), un condenseur (3), un dispositif de décompression (4), un évaporateur (5) et un premier fluide frigorigène. Le second circuit de fluide frigorigène (C2) comprend un pré-refroidisseur (7), un réchauffeur (8) et un second fluide frigorigène. Le condenseur (3) comprend une première partie et une seconde partie. La seconde partie est positionnée en amont de la première partie dans la direction d'écoulement de l'air aspiré par le ventilateur depuis l'extérieur vers l'intérieur du boîtier. Un passage d'air est conçu pour permettre à l'air de passer à travers le pré-refroidisseur (7), l'évaporateur (5), le réchauffeur (8) et la première partie dans cet ordre, et est configuré pour permettre à l'air de passer à travers le pré-refroidisseur (7), l'évaporateur (5) et la seconde partie dans cet ordre.
PCT/JP2019/048796 2019-12-12 2019-12-12 Déshumidificateur WO2021117199A1 (fr)

Priority Applications (4)

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JP2021563545A JP7308975B2 (ja) 2019-12-12 2019-12-12 除湿装置
CN201980102764.2A CN114761107A (zh) 2019-12-12 2019-12-12 除湿装置
PCT/JP2019/048796 WO2021117199A1 (fr) 2019-12-12 2019-12-12 Déshumidificateur
TW109117995A TWI765270B (zh) 2019-12-12 2020-05-29 除濕裝置

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JPS61272568A (ja) * 1985-05-24 1986-12-02 松下電工株式会社 除湿機
JP2002130863A (ja) * 2000-10-19 2002-05-09 Chikayoshi Sato 除湿方法
WO2003104719A1 (fr) * 2002-06-11 2003-12-18 株式会社荏原製作所 Deshumidificateur/condi tionneur d'air
WO2018131121A1 (fr) * 2017-01-12 2018-07-19 三菱電機株式会社 Dispositif de déshumidification

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JP4006679B2 (ja) * 2002-03-20 2007-11-14 三菱電機株式会社 冷凍装置
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TWI693366B (zh) * 2014-12-22 2020-05-11 日商松下知識產權經營股份有限公司 除濕裝置
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JPS5941728A (ja) * 1982-08-31 1984-03-08 Matsushita Electric Ind Co Ltd 除湿機の熱交換通風装置
JPS61272568A (ja) * 1985-05-24 1986-12-02 松下電工株式会社 除湿機
JP2002130863A (ja) * 2000-10-19 2002-05-09 Chikayoshi Sato 除湿方法
WO2003104719A1 (fr) * 2002-06-11 2003-12-18 株式会社荏原製作所 Deshumidificateur/condi tionneur d'air
WO2018131121A1 (fr) * 2017-01-12 2018-07-19 三菱電機株式会社 Dispositif de déshumidification

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JP7308975B2 (ja) 2023-07-14
TWI765270B (zh) 2022-05-21
TW202122720A (zh) 2021-06-16
JPWO2021117199A1 (fr) 2021-06-17

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