WO2020065766A1 - 空気調和装置 - Google Patents
空気調和装置 Download PDFInfo
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- WO2020065766A1 WO2020065766A1 PCT/JP2018/035691 JP2018035691W WO2020065766A1 WO 2020065766 A1 WO2020065766 A1 WO 2020065766A1 JP 2018035691 W JP2018035691 W JP 2018035691W WO 2020065766 A1 WO2020065766 A1 WO 2020065766A1
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- Prior art keywords
- heat
- indoor
- heat medium
- unit
- medium
- Prior art date
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- 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
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
- F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
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- 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
- F25B2600/00—Control issues
- F25B2600/13—Pump speed control
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- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
Definitions
- the present invention relates to an air conditioner.
- the present invention relates to an air conditioner that circulates a heat medium such as water different from a refrigerant to perform air conditioning.
- ⁇ ⁇ There is an air conditioner that forms a heat medium circulation circuit that circulates a heat medium containing water or brine between the heat source side device and the indoor unit to perform air conditioning.
- the heat source-side device heats or cools the heat medium to supply heat to the indoor unit.
- the indoor unit heats or cools indoor air with heat supplied by the heat medium to perform air conditioning (for example, see Patent Literature 1).
- the heat source side device has a heat exchanger and exchanges heat with a refrigerant or the like in the heat exchanger to supply heat to the heat medium.
- it is necessary to pass the heat medium through the heat exchanger at a flow rate higher than the required flow rate in consideration of the pressure loss of the flow path in the heat exchanger.
- the heat load is small, such as when the number of indoor units performing air conditioning is small, it may not be necessary to circulate the heat medium at a flow rate of a certain amount or more to supply heat.
- a bypass pipe for bypassing the heat medium inlet and outlet of the heat exchanger has been connected.
- the bypass valve installed in the bypass pipe is opened, the heat medium flowing out of the heat exchanger is bypassed to the inflow port, and the heat medium is supplied to the indoor unit side. Was sent to the heat exchanger without being sent.
- An object of the present invention is to provide an air conditioner capable of reducing costs in order to solve the above problems.
- An air conditioner includes a pump that pressurizes a heat medium serving as a medium for transporting heat, including water or brine, and a plurality of indoor heat exchangers that exchange heat between indoor air to be air-conditioned and the heat medium.
- a heat medium circulating circuit installed in correspondence with the indoor heat exchanger, connecting a plurality of flow rate adjusting devices for adjusting the flow rate of the heat medium passing through the indoor heat exchanger by piping, and circulating the heat medium;
- a heat source side device for heating or cooling the heat medium to be sent to the heat exchanger, and a control device for controlling equipment of the heat medium circulation circuit, the control device sends the heat medium to the indoor heat exchanger in which heat exchange is stopped.
- the heat medium is passed through the indoor heat exchanger in which the heat exchange is stopped, and the heat medium having a flow rate higher than the required flow rate is circulated in the heat medium circulation circuit. Therefore, there is no need to install bypass pipes, bypass valves, and the like, and to perform a test operation related to control of the bypass valves, thereby reducing costs.
- FIG. 2 is a diagram showing an example of a configuration of an air conditioner 0 according to Embodiment 1 of the present invention.
- FIG. 2 is a diagram showing a configuration of a relay unit control device 200 according to Embodiment 1 of the present invention.
- FIG. 4 is a diagram showing a flow of a process related to securing a required flow rate according to the first embodiment of the present invention.
- FIG. 9 is a diagram showing a configuration of a relay unit control device 200 according to Embodiment 2 of the present invention.
- FIG. 13 is a diagram illustrating a configuration of a relay unit control device 200 according to Embodiment 3 of the present invention. It is a figure which shows an example of a structure of the air conditioner 0 which concerns on Embodiment 4 of this invention.
- FIG. 1 is a diagram schematically illustrating an installation example of an air conditioner 0 according to Embodiment 1 of the present invention. An example of installation of the air conditioner 0 according to Embodiment 1 will be described based on FIG.
- the air-conditioning apparatus 0 includes a heat-source-side refrigerant circuit A that circulates the heat-source-side refrigerant, and a heat-medium circulation circuit B that circulates a heat medium such as water that transfers and conveys heat. Then, air conditioning is performed by cooling and heating.
- the heat-source-side refrigerant circuit A functions as a heat-source-side device that supplies hot or cold heat to the indoor side by heating or cooling the heat medium in the heat medium circuit B.
- the air conditioner 0 includes one outdoor unit 1 serving as a heat source unit, a plurality of indoor units 3 (indoor units 3a to 3c) serving as indoor units, and a relay unit 2 Having.
- the relay unit 2 is a unit that relays heat transfer between the heat source-side refrigerant circulating in the heat source-side refrigerant circulation circuit A and the heat medium circulating in the heat medium circulation circuit B.
- the outdoor unit 1 and the relay unit 2 are connected by a refrigerant pipe 6 serving as a flow path of the heat source side refrigerant.
- a plurality of relay units 2 can be connected to one outdoor unit 1 in parallel.
- each indoor unit 3 is connected to the relay unit 2 via a heat medium pipe 5 serving as a heat medium flow path.
- Examples of the heat-source-side refrigerant circulating in the heat-source-side refrigerant circuit A include single refrigerants such as R-22 and R-134a, pseudo-azeotropic mixed refrigerants such as R-410A and R-404A, and R-407C.
- Non-azeotropic refrigerant mixtures can be used.
- a natural refrigerant such as CO 2 , propane, etc., which contains a double bond in the chemical formula. it can.
- the heat medium circulating in the heat medium circulation circuit B for example, brine (antifreeze), water, a mixture of brine and water, a mixture of an additive having high anticorrosion effect and water, and the like can be used.
- brine antifreeze
- water a mixture of brine and water
- a highly safe device can be used as the heat medium.
- FIG. 2 is a diagram showing an example of a configuration of the air-conditioning apparatus 0 according to Embodiment 1 of the present invention. Based on FIG. 2, the configuration of the devices and the like included in the air conditioner 0 will be described. As described above, the outdoor unit 1 and the relay unit 2 are connected by the refrigerant pipe 6. The relay unit 2 and each indoor unit 3 are connected by a heat medium pipe 5. Here, in FIG. 2, three indoor units 3 are connected to the relay unit 2 via the heat medium pipe 5. However, the number of connected indoor units 3 is not limited to three.
- the outdoor unit 1 is a unit that circulates heat from the heat source side refrigerant in the heat source side refrigerant circulation circuit A to convey heat, and causes the heat medium heat exchanger 21 of the relay unit 2 to exchange heat with a heat medium.
- cold heat is transported by the heat-source-side refrigerant.
- the outdoor unit 1 includes a compressor 10, a heat source side heat exchanger 12, a throttle device 13, and an accumulator 14 in a housing.
- the compressor 10, the refrigerant flow switching device 11, the heat source side heat exchanger 12, and the accumulator 14 are connected by a refrigerant pipe 6 and mounted.
- the compressor 10 sucks and compresses the heat-source-side refrigerant and discharges the refrigerant in a high-temperature and high-pressure state.
- the compressor 10 may be configured by, for example, an inverter compressor whose capacity can be controlled.
- the refrigerant flow switching device 11 is a device that switches the flow path of the heat-source-side refrigerant according to the cooling operation mode or the heating operation mode. When only the cooling operation or the heating operation is performed, it is not necessary to install the refrigerant flow switching device 11.
- the heat source side heat exchanger 12 exchanges heat between the outdoor air supplied from the heat source side blower 15 and the heat source side refrigerant, for example.
- it functions as an evaporator and causes the heat source side refrigerant to absorb heat.
- the cooling operation mode it functions as a condenser or a radiator, and radiates heat to the heat source side refrigerant.
- the expansion device 13 is a device that functions as a pressure reducing valve and an expansion valve, and expands the heat source side refrigerant by reducing the pressure.
- an electronic expansion valve or the like that can control the opening degree to an arbitrary size and can optionally adjust the flow rate of the heat-source-side refrigerant is preferable.
- the accumulator 14 is provided on the suction side of the compressor 10.
- the accumulator 14 stores, for example, a difference in the amount of refrigerant used between the heating operation mode and the cooling operation mode, and excess refrigerant generated during a transition period when the operation changes.
- the accumulator 14 may not be installed in the heat source side refrigerant circulation circuit A in some cases.
- the indoor unit 3 is a unit that sends conditioned air to an indoor space.
- Each indoor unit 3 of the first embodiment includes an indoor heat exchanger 31 (indoor heat exchanger 31a to indoor heat exchanger 31c), an indoor flow control device 32 (indoor flow control device 32a to indoor flow control device 32c), and a room. It has an inner blower 33 (indoor blower 33a to indoor blower 33c).
- the indoor heat exchanger 31 and the indoor flow rate adjusting device 32 are devices that constitute the heat medium circulation circuit B.
- the indoor flow control device 32 is constituted by, for example, a two-way valve or the like that can control the opening degree (opening area) of the valve.
- the indoor flow rate adjusting device 32 controls the flow rate (the amount of the heat medium flowing per unit time) of the heat medium flowing into and out of the indoor heat exchanger 31 by adjusting the opening degree.
- the indoor flow rate adjusting device 32 adjusts the amount of the heat medium passing through the indoor heat exchanger 31 based on the temperature of the heat medium flowing into the indoor unit 3 and the temperature of the heat medium flowing out of the indoor unit 3. 31 enables heat exchange by the amount of heat according to the heat load in the room.
- the indoor flow rate adjusting device 32 is installed on the pipe on the heat medium outflow side of the indoor heat exchanger 31, but is not limited thereto.
- the indoor flow rate adjusting device 32 may be installed on the heat medium inflow side of the indoor heat exchanger 31.
- the indoor heat exchanger 31 has, for example, a heat transfer tube and a fin. Then, the heat medium passes through the heat transfer tubes of the indoor heat exchanger 31.
- the indoor heat exchanger 31 exchanges heat between the indoor space air supplied from the indoor blower 33 and the heat medium. When a heat medium that is cooler than air passes through the heat transfer tubes, the air is cooled and the indoor space is cooled.
- the indoor-side blower 33 allows the air in the indoor space to pass through the indoor heat exchanger 31 and generates a flow of air returning to the indoor space.
- the relay unit 2 is a unit having a device related to heat transfer between the heat source-side refrigerant circulating in the heat source-side refrigerant circulation circuit A and the heat medium circulating in the heat medium circulation circuit B.
- the relay unit 2 has a heat medium heat exchanger 21, a pump 22, and an inverter device 23.
- the heat medium heat exchanger 21 performs heat exchange between the heat source side refrigerant and the heat medium to transfer heat from the heat source side refrigerant to the heat medium.
- the heat medium heat exchanger 21 functions as a condenser or a radiator, and radiates heat to the heat-source-side refrigerant.
- the heat medium When the heat medium is cooled, it functions as an evaporator and causes the heat source side refrigerant to absorb heat.
- the pump 22 is a device that sucks and pressurizes the heat medium and circulates the heat medium circulation circuit B.
- the inverter device 23 performs AC conversion, arbitrarily changes the drive frequency of the electric power supplied to the pump 22, and finely changes the rotation speed of a motor (not shown) of the pump 22 according to the drive frequency. For this reason, the inverter device 23 can suppress the power consumption of the pump 22 and the supply of more heat than necessary by changing the driving frequency.
- the compressor 10 draws in the heat-source-side refrigerant, compresses the refrigerant, and discharges the refrigerant at high temperature and high pressure.
- the discharged heat-source-side refrigerant flows into the heat-source-side heat exchanger 12 via the refrigerant flow switching device 11.
- the heat source side heat exchanger 12 exchanges heat between the air supplied by the heat source side blower 15 and the heat source side refrigerant, and condenses and liquefies the heat source side refrigerant.
- the heat-source-side refrigerant condensed and liquefied passes through the expansion device 13.
- the expansion device 13 decompresses the condensed and liquefied heat-source-side refrigerant passing therethrough.
- the decompressed heat-source-side refrigerant flows out of the outdoor unit 1, passes through the refrigerant pipe 6, and flows into the heat medium heat exchanger 21 of the relay unit 2.
- the heat medium heat exchanger 21 exchanges heat between the heat source side refrigerant and the heat medium that pass through, and evaporates the heat source side refrigerant into gas.
- the heat-source-side refrigerant flowing out of the heat medium heat exchanger 21 flows out of the relay unit 2, passes through the refrigerant pipe 6, and flows into the outdoor unit 1. Then, the compressor 10 sucks the heat-source-side refrigerant which has passed through the refrigerant flow switching device 11 and has been evaporated and gasified again.
- the compressor 10 draws in the heat-source-side refrigerant, compresses the refrigerant, and discharges the refrigerant at high temperature and high pressure.
- the discharged heat-source-side refrigerant flows out of the outdoor unit 1 through the refrigerant flow switching device 11, passes through the refrigerant pipe 6, and flows into the heat medium heat exchanger 21 of the relay unit 2.
- the heat medium heat exchanger 21 exchanges heat between the heat source side refrigerant and the heat medium that pass through, and condenses and liquefies the heat source side refrigerant. At this time, the heat medium is heated.
- the condensed and liquefied heat source side refrigerant flows out of the heat medium heat exchanger 21, and the heat source side refrigerant flows out of the relay unit 2, passes through the refrigerant pipe 6, and passes through the expansion device 13 of the outdoor unit 1.
- the expansion device 13 decompresses the condensed and liquefied heat-source-side refrigerant passing therethrough.
- the decompressed heat source side refrigerant flows into the heat source side heat exchanger 12.
- the heat-source-side heat exchanger 12 exchanges heat between the air supplied by the heat-source-side blower 15 and the heat-source-side refrigerant, and evaporates the heat-source-side refrigerant. Then, the compressor 10 sucks the heat-source-side refrigerant which has passed through the refrigerant flow switching device 11 and has been evaporated and gasified again.
- the air conditioner 0 is provided with various sensors serving as detection devices for detecting physical quantities.
- a discharge temperature sensor 501 detects the temperature of the refrigerant discharged from the compressor 10 and outputs a discharge temperature detection signal.
- An outdoor unit control device 100 described later obtains a discharge temperature detection signal output by the discharge temperature sensor 501.
- the discharge temperature sensor 501 has a thermistor and the like. Further, it is assumed that other temperature sensors described below also have a thermistor or the like.
- the discharge pressure sensor 502 detects the pressure of the refrigerant discharged from the compressor 10 and outputs a discharge pressure detection signal.
- the outdoor unit control device 100 described later obtains a discharge pressure detection signal output by the discharge pressure sensor 502.
- the outdoor temperature sensor 503 is installed in the outdoor unit 1 at an air inflow portion of the heat source side heat exchanger 12.
- the outdoor temperature sensor 503 detects, for example, an outdoor temperature that is a temperature around the outdoor unit 1 and outputs an outdoor temperature detection signal.
- An outdoor unit control device 100 described later obtains an outdoor temperature detection signal output by the outdoor temperature sensor 503.
- a first refrigerant temperature sensor 504 and a second refrigerant temperature sensor 505 are provided on the relay unit 2 side.
- the first refrigerant temperature sensor 504 is provided on a pipe on the refrigerant inflow side of the heat medium heat exchanger 21 when cooling the heat medium in the flow of the refrigerant in the heat source side refrigerant circuit A. Then, the first refrigerant temperature sensor 504 and the second refrigerant temperature sensor 505 detect the temperature of the refrigerant flowing into and out of the heat medium heat exchanger 21, and output a refrigerant side detection signal.
- a relay unit control device 200 described later obtains a refrigerant-side detection signal output by the first refrigerant temperature sensor 504 and the second refrigerant temperature sensor 505.
- a heat medium inlet side temperature sensor 511 and a heat medium outlet side temperature sensor 512 are provided on the relay unit 2 side.
- the heat medium inlet side temperature sensor 511 is installed on a pipe on the heat medium inflow side of the heat medium heat exchanger 21 in the flow of the heat medium in the heat medium circulation circuit B. Then, the heat medium inlet side temperature sensor 511 detects the temperature of the heat medium flowing into the heat medium heat exchanger 21 and outputs a heat medium inlet side temperature detection signal.
- a relay unit control device 200 described later obtains a heat medium inlet side temperature detection signal output by the heat medium inlet side temperature sensor 511.
- the heat medium outlet side temperature sensor 512 is installed in a pipe on the heat medium outflow side of the heat medium heat exchanger 21 in the flow of the heat medium in the heat medium circulation circuit B. Then, the heat medium outlet side temperature sensor 512 detects the temperature of the heat medium flowing out of the heat medium heat exchanger 21 and outputs a heat medium outlet side temperature detection signal.
- a pump inflow side pressure sensor 523 and a pump outflow side pressure sensor 524 are installed on the relay unit 2 side.
- the pump inflow-side pressure sensor 523 is installed in a pipe on the heat medium inflow side of the pump 22 in the flow of the heat medium in the heat medium circulation circuit B. Then, the pump inflow side pressure sensor 523 detects the pressure of the heat medium flowing into the pump 22, and outputs a heat medium inflow side pressure detection signal.
- the pump outlet pressure sensor 524 is installed in a pipe on the heat medium outlet side of the pump 22 in the flow of the heat medium in the heat medium circulation circuit B.
- the pump outlet pressure sensor 524 detects the pressure of the heat medium flowing out of the pump 22 and outputs a heat medium outlet pressure detection signal.
- the relay unit control device 200 described later obtains the heat medium inflow side pressure detection signal output by the pump inflow side pressure sensor 523 and the heat medium outflow side pressure detection signal output by the pump outflow side pressure sensor 524.
- an indoor inlet temperature sensor 513 (an indoor inlet temperature sensor 513a to an indoor inlet temperature sensor 513c) is installed on each indoor unit 3 side. Further, an indoor outlet temperature sensor 514 (an indoor outlet temperature sensor 514a to an indoor outlet temperature sensor 514c) is provided.
- the indoor inlet side temperature sensor 513 detects the temperature of the heat medium flowing into the indoor heat exchanger 31, and outputs an inlet side detection signal.
- the indoor unit control device 300 of each indoor unit 3 described below obtains the inflow side detection signal output from the corresponding indoor outflow side temperature sensor 514.
- Each indoor outlet side temperature sensor 514 detects the temperature of the heat medium flowing out of the indoor heat exchanger 31 and outputs an outlet side detection signal.
- An indoor unit control device 300 described later obtains an outflow side detection signal output from a corresponding indoor outflow side temperature sensor 514.
- an indoor inflow side pressure sensor 521 (an indoor inflow side pressure sensor 521a to an indoor inflow side pressure sensor 521c) is installed on the indoor unit 3 side.
- an indoor outflow side pressure sensor 522 (an indoor outflow side pressure sensor 522a to an indoor outflow side pressure sensor 522c) is provided.
- the indoor inflow side pressure sensor 521 and the indoor outflow side pressure sensor 522 are respectively installed on the heat medium inflow / outflow side in the indoor flow rate adjusting device 32 of each indoor unit 3 and send a signal corresponding to the detected pressure.
- the indoor unit control device 300 of each indoor unit 3 described later obtains a signal corresponding to the pressure output by the corresponding indoor inflow side pressure sensor 521 and indoor outflow side pressure sensor 522.
- the indoor inflow side pressure sensor 521 of the indoor unit 3 and the like can be omitted.
- a flow rate detecting device for detecting a flow rate may be provided instead of each pressure sensor or together with each pressure sensor.
- a heat amount detecting device that can detect a heat amount related to heat exchange with the air in the indoor space, which is a heat load, may be provided in the heat medium circulation circuit B.
- Each indoor unit control device 300 acquires the amount of heat related to heat exchange in the indoor heat exchanger 31 by performing calculations and the like. Then, each indoor unit control device 300 sends a signal including the acquired calorie data to the relay unit control device 200.
- an indoor temperature sensor 515 (an indoor temperature sensor 515a to an indoor temperature sensor 515c) is installed on each indoor unit 3 side.
- the indoor temperature sensor 515 detects the suction temperature, which is the temperature of the air flowing into the indoor heat exchanger 31, based on the flow of air driven by the indoor blower 33, and outputs a suction temperature detection signal.
- the suction temperature may be the temperature of indoor air in the indoor space, which is a heat load.
- each unit has a control device that controls a device included in each unit.
- each control device performs processing based on signals such as data of physical quantities included in signals transmitted from various sensors, instructions and settings transmitted from an input device (not shown), and the like.
- each control device is connected by wire communication or wireless communication with another control device, and can communicate signals including various data with the other control device.
- the outdoor unit 1 has an outdoor unit control device 100.
- the relay unit 2 has a relay unit control device 200.
- Each indoor unit 3 has an indoor unit controller 300 (indoor unit controller 300a to indoor unit controller 300c).
- each indoor unit control device 300 includes, in a signal, data such as pressure and temperature detected by a sensor in the corresponding indoor unit 3 and relays the data to the relay unit 2. It can be sent to the unit controller 200.
- each indoor unit control device 300 can also transmit to the relay unit control device 200 data relating to the indoor set temperature and data obtained by calculating the amount of heat and the like input from a remote controller (not shown). Further, data relating to the characteristics of the equipment included in the corresponding indoor unit 3, such as the heat exchange capacity of the indoor heat exchanger 31, can be sent to the relay unit controller 200.
- FIG. 3 is a diagram showing a configuration of the relay unit control device 200 according to Embodiment 1 of the present invention. As described above, the processing related to the control in the first embodiment is performed by the relay unit control device 200.
- the relay unit control device 200 includes a control processing device 210, a storage device 220, a timing device 230, and a communication device 240.
- the storage device 220 stores data used when the control processing device 210 performs processing.
- the storage device 220 of the first embodiment stores data relating to the characteristics of the devices included in each indoor unit 3.
- the storage device 220 includes a volatile storage device (not shown) such as a random access memory (RAM) that can temporarily store data and a nonvolatile auxiliary storage device (not shown) such as a flash memory that can store data for a long period of time. Z).
- the storage device 220 stores a program, and the control processing device 210 executes a process based on the program to realize a process performed by each unit of the control processing device 210.
- the time counting device 230 has a timer and the like, and the control processing device 210 counts time used for calculations and the like.
- the communication device 240 is an interface device that performs signal conversion and the like when the control processing device 210 performs communication of a signal including data with a control device of another unit. Hereinafter, communication between the control processing device 210 and the control devices of other units is performed via the communication device 240.
- the control processing device 210 includes an arithmetic processing unit 211, a determination processing unit 212, a selection processing unit 213, and an instruction processing unit 214.
- the arithmetic processing unit 211 performs various arithmetic processes such as calculating the differential pressure of the heat medium flowing into and out of the pump 22.
- the determination processing unit 212 stops the air conditioning by the cooling / heating operation and circulates the heat medium having a flow rate equal to or higher than the required flow rate to the heat medium circuit B, and stops the heat exchange of the indoor heat exchanger of the indoor unit 3. It is determined whether or not it is necessary to allow the heat medium to pass through the indoor unit 31 (hereinafter, described as the stopped indoor unit 3).
- the selection processing unit 213 performs a selection process of selecting the indoor unit 3 through which the heat medium passes based on the selection condition based on the determination of the determination processing unit 212. Then, the instruction processing unit 214 performs a process of transmitting an instruction signal to the indoor unit 3 selected by the selection processing unit 213 via the communication device 240.
- the control processing device 210 is configured by a microcomputer having a control arithmetic processing device such as a CPU (Central Processing Unit), for example.
- the air-conditioning apparatus 0 allows the heat medium to pass through the indoor unit 3 whose operation is stopped, and the heat medium having a flow rate equal to or higher than the required flow rate in the heat medium heat exchanger 21 to the heat medium It circulates through the circulation circuit B.
- FIG. 4 is a diagram showing a flow of processing related to securing a required flow rate according to Embodiment 1 of the present invention.
- the processing performed by the control processing device 210 of the relay unit control device 200 will be described based on FIG.
- the arithmetic processing unit 211 of the control processing device 210 calculates the differential pressure from the heat medium inflow side pressure detection signal sent from the pump inflow side pressure sensor 523 and the heat medium outflow side pressure detection signal sent from the pump outflow side pressure sensor 524. (Step S1).
- the determination processing unit 212 of the control processing device 210 determines whether it is necessary to pass the heat medium to the indoor unit 3 in which the air conditioning by the cooling / heating operation is stopped. Is determined (step S2). If it is determined that there is no need to allow the heat medium to pass through the stopped indoor unit 3, the process ends.
- the determination is made based on the differential pressure, but the arithmetic processing unit 211 may further calculate the flow rate of the heat medium from the differential pressure, and the determination processing unit 212 may make the determination based on the flow rate. .
- the selection processing unit 213 of the control processing device 210 determines that the indoor medium 3 that is stopped passes the heat medium, the selection processing unit 213 performs a process of selecting one or a plurality of indoor units 3 that satisfy a preset selection condition (Ste S3).
- the selection condition may be a condition for selecting an indoor unit 3 that can secure a required flow rate.
- the capacity of the indoor heat exchanger 31 and the like are set as specific conditions.
- the condition may be such that the temperature of the indoor space is not affected or the light indoor unit 3 is selected even if the heat medium is passed through.
- the amount of heat supplied to the indoor unit 3 by the passage of the heat medium, the change in the temperature of the indoor air due to the supplied amount of heat, and the like are set as specific conditions. Furthermore, conditions can be set such that an indoor unit 3 in which dew condensation does not occur in the indoor unit 3 is selected. At this time, for example, a temperature difference between the temperature of the heat medium passing through the indoor unit 3 and the temperature of the indoor air is set as a specific condition.
- the selection processing unit 213 selects the indoor unit 3 based on the data relating to each indoor unit 3 stored in the storage device 220, the data calculated by the arithmetic processing unit 211, and the like, such as the characteristics of the indoor unit 3.
- the instruction processing unit 214 of the control processing device 210 sends an instruction signal to the indoor unit 3 selected by the selection processing unit 213 (Step S4).
- the indoor unit control device 300 opens the indoor flow rate adjusting device 32 to allow the heat medium to pass.
- the relay unit control device 200 performs the above processing at, for example, set time intervals.
- the determination processing unit 212 determines that the indoor heat exchange of the indoor unit 3 in which the heat exchange is stopped. It is determined whether the heat medium is passed through the vessel 31. Then, the selection processing unit 213 selects the indoor unit 3 that is not performing the air conditioning operation and has stopped the heat exchange in the indoor heat exchanger 31 based on the selection condition. Then, the instruction processing unit 214 sends an instruction signal to the selected indoor unit 3 to open the indoor flow rate adjusting device 32.
- FIG. FIG. 5 is a diagram showing a configuration of a relay unit control device 200 according to Embodiment 2 of the present invention.
- the control processing device 210 further includes a rotation setting unit 215.
- the rotation setting unit 215 performs a setting process of switching the indoor units 3 through which the heat medium passes in a predetermined order according to the rotation interval.
- the rotation setting unit 215 causes the instruction processing unit 214 to send an instruction signal when switching the indoor unit 3.
- the rotation interval is set to an interval of 20 minutes to 30 minutes.
- the switching of the passage of the heat medium to the indoor unit 3 not performing the air conditioning is stopped before dew condensation occurs, and the switching of the heat medium to another indoor unit 3 is repeatedly performed.
- the air conditioner 0 according to Embodiment 2 has three or more indoor units 3.
- the effect of the rotation is greater as the number of indoor units 3 that can be switched is larger.
- the rotation setting unit 215 determines the order of rotation in the indoor unit 3.
- the rotation may be set so that the heat medium passes through the indoor units 3 in order from the smallest temperature difference between the temperature of the heat medium and the temperature of the indoor air.
- a group of one or more indoor units 3 may be set, and switching may be performed on a group basis. At this time, three or more groups of indoor units 3 are configured and rotated.
- the rotation setting unit 215 is provided, and the indoor unit 3 that allows the heat medium to pass through can be rotated. Before dew condensation occurs in the indoor unit 3 through which the heat medium passes, rotation of the indoor unit 3 through which the heat medium passes is stopped by stopping the passage of the heat medium and switching to another indoor unit 3. The occurrence of dew can be prevented.
- FIG. FIG. 6 is a diagram showing a configuration of a relay unit control device 200 according to Embodiment 3 of the present invention.
- the control processing device 210 further includes a heat medium temperature setting unit 216.
- the heat medium temperature setting unit 216 sets the temperature of the heat medium supplied to the indoor unit 3 when the heat medium is passed through the stopped indoor unit 3.
- the air conditioner 0 according to Embodiment 2 performs rotation to prevent the occurrence of dew condensation in the indoor unit 3.
- the air conditioner 0 if the number of the indoor units 3 that can be switched is small, the effect of preventing dew condensation may not be exhibited. Therefore, in the air conditioner 0 according to Embodiment 3, when the number of the indoor units 3 selected by the selection processing unit 213 is, for example, one, the heat medium temperature setting unit 216 determines the temperature of the heat medium supplied to the indoor units 3. Set.
- the heat medium temperature setting unit 216 sets the temperature of the heat medium so that the temperature difference from the temperature of the indoor air is reduced. Therefore, when supplying the cooled heat medium to the indoor unit 3, the heat medium temperature setting unit 216 sets the temperature of the heat medium so as to be higher than the current temperature. Further, when supplying the heated heat medium to the indoor unit 3, the heat medium temperature setting section 216 sets the temperature of the heat medium so as to be lower than the current temperature. In the air conditioner 0, cooling or heating is performed in the heat medium heat exchanger 21 by the supply of heat from the heat source side refrigerant circulation circuit A based on the temperature of the heat medium set by the heat medium temperature setting unit 216. .
- the dew condensation resistance of the indoor unit 3 can be improved.
- the amount of heat supplied to the indoor air to be air-conditioned is reduced, but the supply can be performed little by little.
- FIG. 7 is a diagram illustrating an example of a configuration of an air conditioner 0 according to Embodiment 4 of the present invention.
- devices and the like denoted by the same reference numerals as those in FIG. 2 perform the same operations as those described in the first embodiment and the like.
- the air conditioner 0 according to the fourth embodiment is configured such that the devices in the relay unit 2 described in the first and second embodiments are integrated into the outdoor unit 1. For this reason, in the air conditioner 0 of Embodiment 5, the outdoor unit 1 and each of the indoor units 3 are connected by the heat medium pipe 5.
- the pump 22 and the inverter device 23 on the heat medium circulation circuit B side are installed in the outdoor unit 1. Since the outdoor unit 1 accommodates all the devices of the heat source side refrigerant circuit A, the amount of refrigerant can be reduced. In addition, since the outdoor unit 1 and each indoor unit 3 may be connected by piping, the piping work can be simplified.
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Abstract
Description
図1は、この発明の実施の形態1に係る空気調和装置0の設置例の概略を示す図である。図1に基づいて、実施の形態1に係る空気調和装置0の設置例について説明する。空気調和装置0は、熱源側冷媒を循環させる熱源側冷媒循環回路Aおよび熱の授受、搬送などを行う、水などの熱媒体を循環させる熱媒体循環回路Bを備える。そして、冷暖房などにより、空気調和を行う。熱源側冷媒循環回路Aは、熱媒体循環回路B内の熱媒体を加熱または冷却することで、室内側に温熱または冷熱の供給を行う熱源側装置として機能する。
室外ユニット1は、熱源側冷媒循環回路Aにおいて熱源側冷媒を循環させて熱を搬送し、中継ユニット2の熱媒体熱交換器21において、熱媒体との熱交換を行わせるユニットである。実施の形態1においては、熱源側冷媒により冷熱を搬送させる。室外ユニット1は、筐体内に、圧縮機10、熱源側熱交換器12、絞り装置13およびアキュムレータ14を有する。圧縮機10、冷媒流路切替装置11、熱源側熱交換器12およびアキュムレータ14は、冷媒配管6で配管接続され、搭載されている。圧縮機10は、熱源側冷媒を、吸入し、圧縮して、高温および高圧状態にして吐出する。ここで、圧縮機10は、たとえば、容量制御可能なインバータ圧縮機などで構成するとよい。冷媒流路切替装置11は、冷房運転モードまたは暖房運転モードによって、熱源側冷媒の流路を切り替える装置である。冷房運転または暖房運転しか行わない場合には、冷媒流路切替装置11を設置する必要はない。
室内ユニット3は、調和した空気を室内空間に送るユニットである。実施の形態1の各室内ユニット3は、室内熱交換器31(室内熱交換器31a~室内熱交換器31c)、室内流量調整装置32(室内流量調整装置32a~室内流量調整装置32c)および室内側送風機33(室内側送風機33a~室内側送風機33c)を有する。室内熱交換器31および室内流量調整装置32は、熱媒体循環回路Bを構成する機器となる。
次に、中継ユニット2の構成について説明する。中継ユニット2は、熱源側冷媒循環回路Aを循環する熱源側冷媒と熱媒体循環回路Bを循環する熱媒体との伝熱に係る機器を有するユニットである。中継ユニット2は、熱媒体熱交換器21、ポンプ22およびインバータ装置23を有する。
図5は、この発明の実施の形態2に係る中継ユニット制御装置200の構成を示す図である。図5において、図3と同じ符号を付しているものは、実施の形態1で説明したことと同様の動作または処理などを行う。図5に示すように、実施の形態2の中継ユニット制御装置200においては、制御処理装置210が、ローテーション設定部215をさらに有する。ローテーション設定部215は、熱媒体を通過させる室内ユニット3を、ローテーション間隔により、定めた順番で切り替える設定処理を行う。また、ローテーション設定部215は、室内ユニット3の切り替えを行うときに、指示処理部214に指示信号を送らせる。特に限定するものではないが、ここでは、ローテーション間隔を20分~30分間隔に設定する。
図6は、この発明の実施の形態3に係る中継ユニット制御装置200の構成を示す図である。図6において、図3と同じ符号を付しているものは、実施の形態1で説明したことと同様の動作または処理などを行う。図6に示すように、実施の形態3の中継ユニット制御装置200においては、制御処理装置210が、熱媒体温度設定部216をさらに有する。熱媒体温度設定部216は、停止している室内ユニット3に熱媒体を通過させる場合、室内ユニット3に供給する熱媒体の温度を設定する。
図7は、この発明の実施の形態4に係る空気調和装置0の構成の一例を示す図である。図7において、図2と同じ符号を付している機器などについては、実施の形態1などで説明したことと同様の動作を行う。実施の形態4の空気調和装置0は、実施の形態1および実施の形態2で説明した中継ユニット2内の機器を、室外ユニット1に含めて一体化したものである。このため、実施の形態5の空気調和装置0は、室外ユニット1および各室内ユニット3を、熱媒体配管5で配管接続する。熱媒体循環回路B側のポンプ22およびインバータ装置23は、室外ユニット1内に設置されている。室外ユニット1が、熱源側冷媒循環回路Aの機器をすべて収容することで、冷媒の量を少なくすることができる。また、室外ユニット1と各室内ユニット3とを配管接続すればよいので、配管作業を簡単にすることができる。
Claims (8)
- 水またはブラインを含み、熱を搬送する媒体となる熱媒体を加圧するポンプと、
空気調和対象の室内空気と前記熱媒体とを熱交換する複数の室内熱交換器と、
前記室内熱交換器に対応して設置され、前記室内熱交換器を通過する前記熱媒体の流量を調整する複数の流量調整装置と
を配管接続して前記熱媒体を循環させる熱媒体循環回路と、
前記室内熱交換器に送る前記熱媒体を加熱または冷却する熱源側装置と、
前記熱媒体循環回路の機器を制御する制御装置と
を備え、
前記制御装置は、
熱交換を停止している前記室内熱交換器に前記熱媒体を通過させるかどうかを判定する判定処理部と、
前記判定処理部の判定に基づき、熱交換を停止している前記室内熱交換器の中から、前記熱媒体を通過させる前記室内熱交換器を選択する選択処理部と、
選択された前記室内熱交換器に対応する前記流量調整装置の開放を指示する指示処理部と
を有する空気調和装置。 - 前記制御装置は、前記選択処理部が選択した複数の前記室内熱交換器を切り替えながら順番に前記熱媒体を通過させるローテーションの設定を行うローテーション設定部をさらに備える請求項1に記載の空気調和装置。
- 前記制御装置は、停止している前記室内熱交換器に前記熱媒体を通過させる際、前記室内熱交換器に送る前記熱媒体の温度を設定する熱媒体温度設定部をさらに備える請求項1に記載の空気調和装置。
- 前記熱媒体温度設定部は、室内空気の温度との温度差を小さくするように前記熱媒体の温度を設定する請求項3に記載の空気調和装置。
- 前記熱源側装置は、
熱源側冷媒を圧縮する圧縮機と、
前記熱源側冷媒と室外の空気との熱交換を行う熱源側熱交換器と、
前記熱源側冷媒を減圧する絞り装置と、
前記熱源側冷媒と前記熱媒体との熱交換を行う熱媒体熱交換器と
を配管接続した熱源側冷媒循環回路を備える請求項1~請求項4のいずれか一項に記載の空気調和装置。 - 前記制御装置は、前記熱媒体熱交換器における必要通過流量以上の流量の前記熱媒体を前記熱媒体循環回路に循環させる請求項5に記載の空気調和装置。
- 前記圧縮機および前記熱源側熱交換器は、室外ユニットに設置され、
前記熱媒体熱交換器および前記ポンプは、前記室外ユニットと前記室内熱交換器を有する室内ユニットとの間で、伝熱の中継を行う中継ユニットに設置される請求項5または請求項6に記載の空気調和装置。 - 前記熱源側冷媒循環回路の構成機器および前記ポンプは、室外ユニットに設置される請求項5または請求項6に記載の空気調和装置。
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JP2020547666A JP7019066B2 (ja) | 2018-09-26 | 2018-09-26 | 空気調和装置 |
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