WO2017175300A1 - 空気調和装置 - Google Patents
空気調和装置 Download PDFInfo
- Publication number
- WO2017175300A1 WO2017175300A1 PCT/JP2016/061092 JP2016061092W WO2017175300A1 WO 2017175300 A1 WO2017175300 A1 WO 2017175300A1 JP 2016061092 W JP2016061092 W JP 2016061092W WO 2017175300 A1 WO2017175300 A1 WO 2017175300A1
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- WIPO (PCT)
- Prior art keywords
- control mode
- refrigerant
- stirring
- air
- control
- Prior art date
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Classifications
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
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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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present invention relates to an air conditioner using a flammable refrigerant.
- an HFC refrigerant such as R410A, which has a low ozone depletion coefficient and is nonflammable, has been used as a refrigerant in a refrigeration cycle of an air conditioner.
- R410A has a high global warming potential (hereinafter referred to as GWP) property. Therefore, in recent years, conversion to a refrigerant having a low GWP has been studied from the viewpoint of preventing global warming.
- GWP global warming potential
- HFC refrigerant such as R32 refrigerant that has a small ozone layer depletion coefficient as in R410A and has a GWP of about one-third that of R410A.
- a highly flammable HC refrigerant such as a natural refrigerant R290 (propane) whose GWP is about 1/700 of R410A is also used.
- Low GWP refrigerants are often flammable, although the degree of flammability is different.
- Patent Document 1 if the amount of refrigerant leakage per unit time is large, the leakage refrigerant may not be diffused. In addition, there is a case where an air flow rate that can sufficiently stir the leaked refrigerant cannot be obtained due to an obstacle around the indoor unit or the shape of the room. In general, the maximum air flow set for air conditioning in normal operation is not set so large.
- the air volume of the indoor blower and the motor capacity for driving the blower are determined by the preset static pressure inside the machine, the static pressure outside the machine, and the required air volume at the air conditioner capacity, and are larger than the maximum air volume set during normal operation. Air volume cannot be supplied.
- the present invention has been made to solve the above-described problems, and an object thereof is to provide an air conditioner that detects a leaked refrigerant and obtains a sufficient amount of stirring air when the refrigerant leaks.
- An air conditioner includes a refrigerant circuit in which a compressor, a heat source side heat exchanger, an expansion unit, and a use side heat exchanger are connected via a refrigerant pipe to circulate the refrigerant, and is arranged in a space to be air-conditioned.
- An indoor unit having the use side heat exchanger, an indoor blower that blows air to the use side heat exchanger, a refrigerant detection device that is installed in the indoor unit and detects a refrigerant in the air conditioning target space, and an air conditioning load
- a control device for executing a normal control mode for controlling the refrigerant circuit and the indoor blower according to the operation, and a stirring control mode for operating the indoor blower at a stirring speed higher than the rotational speed in the normal control mode.
- the control device includes a leak determination unit that determines presence or absence of refrigerant leakage based on a detection result of the refrigerant detection device, and a control mode when the leakage determination unit determines that there is refrigerant leakage.
- a control mode determining means for determining the agitation control mode, and has a, and operation control means for controlling the indoor fan according to the determined the control mode by the control mode determining means.
- the indoor blower when it is determined that there is refrigerant leakage, the indoor blower is operated at a higher rotational speed than during normal operation, so that the amount of stirring air can be obtained and the formation of the combustible concentration region can be suppressed. Can do.
- FIG. 1 is a configuration diagram of an air conditioner according to Embodiment 1.
- FIG. 2 is a functional block diagram of the air-conditioning apparatus according to Embodiment 1.
- FIG. 3 is a flowchart showing leakage control of the air-conditioning apparatus according to Embodiment 1.
- 6 is a functional block diagram of an air conditioner according to Embodiment 2.
- FIG. It is a flowchart of the stirring operation instruction
- FIG. 1 is a configuration diagram of an air-conditioning apparatus according to Embodiment 1.
- the air conditioner 100 according to the present embodiment includes an indoor unit 1 and an outdoor unit 2.
- the indoor unit 1 and the outdoor unit 2 are connected by a refrigerant pipe and constitute a refrigerant circuit 200.
- the indoor unit 1 is mounted with an expansion means 11 and a use side heat exchanger 12 connected in series.
- the expansion means 11 is composed of, for example, an electronic expansion valve whose opening degree can be variably controlled, and expands the refrigerant under reduced pressure.
- the use side heat exchanger 12 functions as an evaporator during cooling operation to evaporate the refrigerant, and functions as a condenser during heating to condense and liquefy the refrigerant.
- an indoor blower 13 is installed in the indoor unit 1 to blow air to the use side heat exchanger 12.
- the indoor blower 13 is composed of a centrifugal fan or a multiblade fan, and is composed of, for example, a type in which the rotational speed is changed via an inverter or the like and the air volume is controlled.
- the indoor unit 1 is provided with an indoor control device 14, which is composed of a general-purpose CPU, a data bus, an input / output port, a non-volatile memory, and an arithmetic device provided with a timer.
- the indoor control device 14 performs setting control on the opening degree of the expansion means 11 and the rotational speed of the indoor blower 13 in accordance with operation information such as the indoor air temperature, the set temperature, and the refrigerant pipe temperature.
- the air conditioning apparatus 100 includes an operation unit 30 such as a remote control, and operation commands and setting information input via the operation unit 30 are sent to the indoor control device 14 and reflected in operation.
- the indoor unit 1 is provided with a refrigerant detection device 15.
- the refrigerant detection device 15 is constituted by, for example, a temperature sensor or a concentration sensor, and detects the refrigerant in the air-conditioning target space 10.
- the refrigerant detector 15 constantly monitors the presence of the refrigerant, and when the refrigerant leaks out of the refrigerant pipe, for example, changes in the temperature of the surrounding air or changes in the refrigerant gas concentration are measured values or changes in the measured values. Can be taken out as The detection result detected by the refrigerant detection device 15 is transmitted to the indoor control device 14.
- the refrigerant detection device 15 may be selected according to the type of refrigerant, the installation location, and the target range.
- what is used as a refrigerant leak detector includes an infrared sensor, a temperature sensor, and a heat semiconductor sensor that detects contact with the refrigerant.
- a compressor 21 and a heat source side heat exchanger 22 are connected and mounted in series.
- the compressor 21 sucks the refrigerant and compresses the refrigerant to a high temperature and high pressure state.
- the compressor 21 is configured to be controlled by the inverter 25 so as to control the capacity.
- the heat source side heat exchanger 22 functions as a condenser during cooling operation and as an evaporator during heating operation.
- An outdoor fan 23 is attached to the heat source side heat exchanger 22 to supply outside air to the heat source side heat exchanger 22.
- the outdoor blower 23 is composed of, for example, a centrifugal fan or a multiblade fan.
- the outdoor unit 2 is provided with an outdoor control device 24, which is composed of a calculation device including a general-purpose CPU, a data bus, an input / output port, a nonvolatile memory, and a timer.
- the indoor control device 14 and the outdoor control device 24 are connected by a transmission line so that information can be transmitted and received.
- the outdoor control device 24 performs preset control on the rotational speed of the compressor 21 and the rotational speed of the outdoor blower 23 based on the operation command and the operation information transmitted from the indoor unit 1.
- FIG. 1 Main operation control of the air conditioner 100 is performed by the indoor control device 14 and the outdoor control device 24.
- the CPU of the outdoor control device 24 carries out operation modes such as cooling and heating set from the operation unit 30, for example.
- the refrigerant circuit 200, the outdoor fan 23, and the like are controlled according to the operation load of the use side heat exchanger 12.
- the refrigerant circuit 200 is configured by a refrigeration cycle in which the compressor 21, the heat source side heat exchanger 22, the expansion means 11, and the use side heat exchanger 12 are sequentially connected in an annular manner through the refrigerant pipe. ing.
- the refrigerant may be either an HFC refrigerant or an HC refrigerant, but here, as an example, a description will be given assuming that a flammable refrigerant is used.
- the indoor unit 1 is installed in the air conditioning target space 10, and a refrigerant is sealed in the refrigerant circuit 200 of the air conditioner 100.
- the refrigerant is heated to high temperature and high pressure by the compressor 21, discharged from the compressor 21, and flows into the heat source side heat exchanger 22.
- the refrigerant flowing into the heat source side heat exchanger 22 exchanges heat with the air supplied from the outdoor blower 23 and is condensed and liquefied. That is, the refrigerant dissipates heat and changes its state to liquid.
- the condensed and liquefied refrigerant flows through the refrigerant pipe and flows into the expansion means 11.
- the refrigerant that has flowed into the expansion means 11 is decompressed and expanded, and changes its state to a low-temperature and low-pressure gas-liquid two-phase refrigerant consisting of liquid and gas.
- the gas-liquid two-phase refrigerant flows into the use side heat exchanger 12.
- the gas-liquid two-phase refrigerant flowing into the use side heat exchanger 12 is gasified by exchanging heat with the indoor air supplied from the indoor blower 13. That is, the gas-liquid two-phase refrigerant absorbs heat from the air, cools the air, and changes its state to gas.
- the gasified refrigerant flows out from the use side heat exchanger 12 and is sucked into the compressor 21 again through the refrigerant pipe.
- the air in the air-conditioning target space 10 supplied to the use side heat exchanger 12 is sucked into the indoor unit 1 through the suction port 16 provided below the indoor unit 1.
- the sucked air is cooled by the evaporation heat of the refrigerant flowing into the use side heat exchanger 12, and is supplied to the air-conditioning target space 10 from the blowout port 17 provided above the indoor unit 1 by the indoor blower 13.
- the temperature of the room air rises by cooling the area to be cooled and the heat generating equipment installed.
- the indoor air whose temperature has risen is supplied again to the use-side heat exchanger 12 by the blower, and is cooled by the heat of evaporation of the refrigerant.
- FIG. 1 shows a case where two suction ports 16 are provided, only one or a plurality of suction ports 16 may be provided.
- FIG. 2 is a functional block diagram of the air-conditioning apparatus according to Embodiment 1.
- the indoor control device 14 includes a leakage determination unit 14a, a control mode determination unit 14b, and an operation control unit 14c.
- the leakage determination means 14a determines the presence or absence of refrigerant leakage based on the detection result of the refrigerant detection device 15. The determination result is added to the driving information.
- the refrigerant leakage determination method may be appropriately determined according to the type of sensor used in the refrigerant detection device 15. For example, when a temperature sensor is used as the refrigerant detection device 15, the leakage determination unit 14 a determines that there is refrigerant leakage when a change in temperature as a detection result is larger than a set change amount. The leakage determination unit 14a may perform determination based on the increase rate instead of the change amount.
- coolant detection apparatus 15 you may determine with refrigerant
- the refrigerant detection device 15 is installed in the indoor unit 1, but may be installed outside the indoor unit 1, that is, in the air conditioning target space 10. In that case, the refrigerant detection device 15 and the indoor control device 14 may be connected by a transmission line or the like. Moreover, the refrigerant
- the refrigerant leakage detection method and the information transmission means to the indoor control device 14 are not limited to the above-described means.
- the control mode determination unit 14b determines the control mode according to the determination result of the leakage determination unit 14a. There are two control modes, a normal control mode and a stirring control mode, and the indoor control device 14 stores control information for each control mode.
- the air conditioning apparatus 100 is operated in the normal control mode, the indoor blower 13 is controlled according to the set operation mode.
- the agitation control mode the indoor blower 13 is operated at a higher agitation speed than that in the normal control mode.
- the air conditioner 100 is normally controlled in the normal control mode.
- the control mode determination unit 14b determines the stirring control mode as the control mode to be used.
- the operation control means 14c performs operation control according to the control mode determined by the control mode determination means 14b. If the normal control mode is determined, control is performed according to control information predetermined for the normal control mode.
- the operation control unit 14c may be configured to refer to the operation status of each device, the set operation mode, operation information, and the like.
- the operation control unit 14c controls the rotation speed of the indoor blower 13 so that the rotation speed is 120% of the maximum rotation speed during normal operation.
- the control mode determination unit 14b determines the normal control mode as the control mode
- the operation control unit 14c switches to the control according to the normal control mode. Specifically, the rotation speed of the indoor blower 13 is returned to the rotation speed of the normal operation.
- the operation control means 14c notifies the outdoor control device 24 that it has been switched to the normal control mode. Accordingly, the outdoor control device 24 that has received the notification can resume control of the refrigerant circuit 200, the outdoor blower 23, and the like according to the set operation mode.
- the indoor blower 13 includes a fan and a motor, and the number of rotations of the motor is frequency controlled by an inverter 25. Therefore, the air volume of the indoor blower 13 is variable.
- the leak determination means 14a, the control mode determination means 14b, and the operation control means 14c were demonstrated as what is provided with all the indoor control apparatuses 14, it is not limited to this.
- the operation control means 14c may be provided in the outdoor control device 24. Since the indoor control device 14 and the outdoor control device 24 are communicably connected, information can be transmitted and received with each other regardless of which function is provided.
- FIG. 3 is a flowchart showing leakage control of the air-conditioning apparatus according to Embodiment 1. With reference to FIG. 3, the refrigerant leakage monitoring performed by the indoor control device 14 and the processing when there is refrigerant leakage will be described.
- the operation mode is determined to be the normal control mode in the control mode determination means 14b, and is executed by the operation control means 14c (step S1).
- the leakage determination unit 14a acquires the detection result from the refrigerant detection device 15 (step S2), and determines the presence or absence of refrigerant leakage based on the detection result (step S3).
- the detection result is temperature information.
- step S3 it is determined that there is no refrigerant leakage when the amount of change between the temperature acquired last time and the temperature acquired this time is below a preset threshold value. In this case, the indoor control device 14 returns the control to step S1, and repeats the processing from step S1.
- the indoor control device 14 transmits a notification command to the notification unit (step S4).
- the indoor control device 14 confirms the current operation status (step S5).
- the control mode determination unit 14b changes the control mode from the normal control mode to the stirring control mode (step S7).
- the control mode determination unit 14b determines that the control mode is the stirring control mode (step S6). S7). That is, when the indoor unit 1 is stopped, the control mode determination unit 14b waits for the refrigerant circuit 200 to operate, and changes the control mode from the normal control mode to the stirring control mode.
- the operation control means 14c performs operation control according to the determined stirring control mode (step S8). That is, the operation control means 14c operates the indoor blower 13 at a higher stirring rotation speed than the rotation speed in the normal control mode.
- the operation control means 14c changes the frequency of the inverter 25 to make the air volume of the indoor blower 13 larger than the air volume in the normal control mode.
- the leakage determination unit 14a acquires the detection result from the refrigerant detection device 15 again (step S9), and determines the presence or absence of refrigerant leakage (step S10). If it is determined in step S10 that there is refrigerant leakage, the control in the stirring control mode is continued, and the leakage monitoring from step S9 to step S10 is repeated. On the other hand, if it is determined in step S10 that there is no refrigerant leakage, the control mode determination unit 14b determines that the leaked refrigerant has sufficiently diffused and determines the normal control mode as the next control mode (step S11). .
- the operation control means 14c performs the operation in the normal control mode according to the changed control mode (step S1). That is, the indoor blower 13 is returned to the normal control mode and operated. When the operation mode is set, control according to the operation mode is resumed.
- FIG. 3 demonstrated the case where the rotation speed of the indoor air blower 13 was changed into stirring rotation speed in stirring control mode, it is good also as a structure which further stops operation of the compressor 21 in stirring control mode. That is, when it is confirmed in step S5 that the operation status is, for example, cooling operation or heating operation and the compressor 21 is operating, the operation control means 14c performs step S8 and stops the compressor 21.
- the stirring control mode is configured not to be terminated by a normal operation stop operation from the operation unit 30 such as a remote control. That is, automatic control is prioritized during the stirring control mode. Therefore, it is possible to avoid the emergency operation being stopped due to a normal operation when there is refrigerant leakage.
- the indoor blower 13 is always operating during the stirring control mode, and the stirring control mode can be terminated only by a special setting change from the operation unit 30 or a switch on the control board of the indoor control device 14. .
- a notification command is transmitted to the notification unit in step S4.
- the notification unit notifies the user of the air conditioner 100 by at least one of sound and light, for example. You may notify danger. Thus, the user can take a safety measure by knowing the refrigerant leakage.
- leakage control since leakage control is always performed, a configuration that can be driven by power supply from an uninterruptible power supply (UPS) or a built-in battery may be used.
- UPS uninterruptible power supply
- a configuration that can be driven by power supply from an uninterruptible power supply (UPS) or a built-in battery may be used.
- UPS uninterruptible power supply
- stirring control can be performed even during a power failure, so accidents due to refrigerant leakage are prevented and the safety of the air conditioning apparatus 100 is ensured.
- the indoor unit 1 is installed near the floor surface, particularly if the refrigerant is heavier than air, the leaked refrigerant tends to stay near the floor surface. Therefore, the stirring effect in the stirring control mode can be easily obtained.
- the air-conditioning apparatus 100 includes the refrigerant detection device 15 that detects the refrigerant in the air-conditioning target space 10, the normal control mode that controls the refrigerant circuit 200 and the indoor blower 13 according to the air-conditioning load, and the room.
- a control device that implements a stirring control mode in which the blower 13 is operated at a stirring speed higher than that in the normal control mode, and the control device determines whether or not refrigerant leaks based on the detection result of the coolant detection device 15. Is determined by the control mode determination means 14b and the control mode determination means 14b for determining the control mode to the agitation control mode when the leakage determination means 14a determines that there is refrigerant leakage. Operation control means 14c for controlling the indoor blower 13 in accordance with the control mode.
- the air conditioner 100 can obtain a stirring air volume larger than the normal air volume, and can prevent formation of a region having a high refrigerant concentration. Therefore, the safety of the air conditioning apparatus 100 can be ensured.
- operation control means 14c may control the indoor blower 13 to operate at the stirring rotation speed and stop the operation of the compressor 21 in the stirring control mode.
- control mode determination unit 14b may determine the control mode as the agitation control mode when the leakage determination unit 14a determines that there is a refrigerant leak while the operation is stopped. As a result, unified control can be performed regardless of operating conditions, and refrigerant leakage management becomes easy.
- control mode determination unit 14b shifts the control mode to the agitation control mode after the operation control unit 14c shifts to the normal control mode when the leakage determination unit 14a determines that there is a refrigerant leak during the operation stop. It may be determined. Thus, sudden switching and execution from the operation stop state to the stirring control mode can be avoided, and the load on each device can be reduced.
- the refrigerant detection device 15 may be a temperature sensor, and the leakage determination unit 14a may determine that there is a refrigerant leak when the change in temperature detected by the refrigerant detection device 15 is larger than the set change amount.
- a relatively inexpensive temperature sensor can be used.
- the determination of the presence or absence of refrigerant leakage is performed based on the amount of change, a stable determination result can be obtained as compared with the case where determination is made using only the measured value.
- the refrigerant may be combustible. Accordingly, since the leaked refrigerant is diffused with a larger air volume than in normal operation, even if the refrigerant leaks, it is difficult to form a combustible concentration range.
- control mode determination unit 14b may determine the control mode to the normal control mode when the leakage determination unit 14a determines that there is no refrigerant leakage during the operation in the stirring control mode. Thus, based on the determination result, the return to the normal control mode is automated, and the user's operation is simplified.
- Embodiment 2 FIG. In the present embodiment, a description will be given of the air conditioner 100 having an alternative means in the case where a plurality of air conditioners are installed in the same air-conditioning target space 10 and the operation in the stirring control mode cannot be sufficiently performed. .
- the air conditioner 100 having an alternative means in the case where a plurality of air conditioners are installed in the same air-conditioning target space 10 and the operation in the stirring control mode cannot be sufficiently performed.
- the other configurations have the same configuration.
- the plurality of indoor control devices 14 are connected to each other via a transmission line, and transmit and receive signals according to settings.
- a configuration of one air conditioner 100 and one other air conditioner 101 will be described as an example.
- Some or all of the plurality of air conditioners may have the same configuration as the air conditioner 100 or other air conditioners 101.
- FIG. 4 is a functional block diagram of the air conditioning apparatus 100 according to the second embodiment.
- the indoor control device 14 further includes a stirring command transmitting unit 14d and a stirring command receiving unit 14e in addition to the leakage determination unit 14a, the control mode determining unit 14b, and the operation control unit 14c.
- the stirring command transmission unit 14d transmits a stirring operation command for causing the other air conditioning apparatus 101 to perform the operation in the stirring control mode to the other air conditioning apparatus 101.
- the operation control means 14c can transmit an agitation operation command to the other air conditioner 101 when the operation cannot be performed due to an abnormality of the indoor blower 13 or when there is no preset output.
- the other air conditioning apparatus 101 that has received the stirring operation command shifts to the stirring control mode, and performs the operation in the predetermined stirring control mode described in the first embodiment. Specifically, the other air conditioning apparatus 101 operates the indoor blower of the indoor unit 1 at a higher rotational speed than during normal operation.
- the stirring command receiving unit 14e receives a stirring operation command for performing an operation in the stirring control mode from another air conditioning apparatus 101.
- the control mode determination means 14b of the air conditioning apparatus 100 can determine the control mode as the stirring control mode and perform the stirring operation.
- the air conditioning apparatus 100 may be configured such that whether or not the stirring operation command can be received from another air conditioning apparatus 101 can be set in the stirring command receiving unit 14e in advance via the operation unit 30.
- the operation unit 30 may be a remote controller or a switch provided in the indoor control device 14. Whether or not to shift to the agitation control mode is determined when an agitation operation command transmitted from another air conditioning apparatus 101 is received according to the setting of whether or not reception is possible.
- FIG. 5 is a flowchart of the agitation operation instruction of the air-conditioning apparatus 100 according to Embodiment 2. Steps S1 to S8 and step S11 and subsequent steps are the same as those in FIG.
- the operation control means 14c acquires the rotation speed information of the indoor blower 13 (step S100), and determines that the acquired rotation speed is less than the set rotation speed (step S101), the stirring command transmission means 14d A stirring operation command is transmitted to the other air conditioning apparatus 101 (step S102). If the acquired number of rotations is equal to or greater than the set number of rotations (step S101), the operation control unit 14c determines that the operation in the agitation control mode is normally performed in the air conditioner 100, and another air conditioner. Transmission of the stirring operation command to 101 is not performed.
- the leakage determination unit 14a acquires the detection result from the refrigerant detection device 15 (step S103), and whether there is a refrigerant leakage. It is determined whether or not (step S104). If it is determined that there is refrigerant leakage, the process returns to step S9, and the monitoring from step S103 to step S104 is repeated. On the other hand, when it is determined that there is no refrigerant leakage (step S104), the stirring command transmission unit 14d transmits a stirring operation cancellation command to the other air conditioner 101 (step S105). Next, the control mode determination means 14b of the air conditioning apparatus 100 determines the normal control mode as the control mode. On the other hand, if the other air conditioning apparatus 101 that has received the stirring operation release command performs the operation in the stirring control mode, the control mode is determined as the normal control mode, and the operation mode before receiving the stirring operation command is set. Transition.
- the control device of the air conditioning apparatus 100 transmits a stirring operation command that causes the other air conditioning apparatus 101 arranged in the same air-conditioning target space 10 to perform the operation in the stirring control mode.
- the operation control means 14c determines that the rotational speed of the indoor blower 13 in the stirring control mode is less than the set rotational speed, the operation control means 14c sends another air conditioning apparatus 101 to the stirring command transmission means 14d.
- a stirring operation command may be transmitted.
- control device includes a stirring command receiving unit 14e that receives a stirring operation command for performing an operation in the stirring control mode from another air conditioner 101 disposed in the same air-conditioning target space 10, and performs control.
- the mode determining unit 14b may determine the control mode as the stirring control mode when the stirring operation command is received by the stirring command receiving unit 14e.
- it may further include an operation unit 30 for setting in advance in the stirring command receiving means 14e whether or not a stirring operation command can be received from another air conditioning apparatus 101.
- an operation unit 30 for setting in advance in the stirring command receiving means 14e whether or not a stirring operation command can be received from another air conditioning apparatus 101.
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Abstract
Description
図1は、実施の形態1に係る空気調和装置の構成図である。図1で示されるように、本実施の形態に係る空気調和装置100は、室内機1と、室外機2とから構成される。室内機1と室外機2とは冷媒配管で接続され、冷媒回路200を構成している。
本実施の形態では、同一の空調対象空間10に空気調和装置が複数台設置されている場合において、攪拌制御モードでの運転が十分に実施できない場合の代替手段を有する空気調和装置100について説明する。以下、実施の形態1と異なる点のみ説明し、他の構成については同じ構成を有するものとする。
Claims (10)
- 圧縮機、熱源側熱交換器、膨張手段、及び利用側熱交換器が冷媒配管を介して接続され、冷媒を循環させる冷媒回路と、
空調対象の空間に配置され、前記利用側熱交換器を有する室内機と、
前記利用側熱交換器に送風する室内送風機と、
前記室内機に設置され、前記空調対象空間の冷媒を検知する冷媒検知装置と、
空調負荷に応じて前記冷媒回路及び前記室内送風機を制御する通常制御モードと、前記室内送風機を前記通常制御モード時の回転数より高い攪拌回転数で稼動させる攪拌制御モードとを実施する制御装置と、を備え、
前記制御装置は、
前記冷媒検知装置の検知結果に基づいて冷媒漏洩の有無を判定する漏洩判定手段と、
前記漏洩判定手段において冷媒漏洩が有ると判定された場合に、制御モードを前記攪拌制御モードに決定する制御モード決定手段と、
前記制御モード決定手段によって決定された前記制御モードに応じて前記室内送風機を制御する運転制御手段と、
を有する空気調和装置。 - 前記運転制御手段は、前記攪拌制御モード時に、前記室内送風機を前記攪拌回転数で稼動させるとともに、前記圧縮機の稼動を停止させるように制御する請求項1に記載の空気調和装置。
- 前記制御モード決定手段は、運転停止中に、前記漏洩判定手段において冷媒漏洩が有ると判定された場合、制御モードを前記攪拌制御モードに決定する請求項1又は2に記載の空気調和装置。
- 前記制御モード決定手段は、運転停止中に、前記漏洩判定手段において冷媒漏洩が有ると判定された場合、前記運転制御手段により前記通常制御モードに移行した後、制御モードを前記攪拌制御モードに決定する請求項1又は2に記載の空気調和装置。
- 前記冷媒検知装置は温度センサであって、
前記漏洩判定手段は、前記冷媒検知装置によって検知された温度の変化が設定変化量より大きい場合に冷媒漏洩が有ると判定する請求項1~4のいずれか一項に記載の空気調和装置。 - 前記冷媒は燃焼性を有したものである請求項1~5のいずれか一項に記載の空気調和装置。
- 前記制御モード決定手段は、前記攪拌制御モードでの運転中、前記漏洩判定手段により冷媒漏洩が無いと判定された場合に、前記制御モードを前記通常制御モードに決定する請求項1~6のいずれか一項に記載の空気調和装置。
- 前記制御装置は、
同一の前記空調対象空間に配置された他の空気調和装置に前記攪拌制御モードでの運転を実施させる、攪拌運転指令を送信する攪拌指令送信手段を備え、
前記運転制御手段は、前記攪拌制御モード時の前記室内送風機の回転数が設定回転数未満であると判定した場合、前記攪拌指令送信手段に前記他の空気調和装置へ前記攪拌運転指令を送信させる請求項1~7のいずれか一項に記載の空気調和装置。 - 前記制御装置は、
同一の前記空調対象空間に配置された他の空気調和装置から、前記攪拌制御モードでの運転を実施するための攪拌運転指令を受信する攪拌指令受信手段を備え、
前記制御モード決定手段は、前記攪拌指令受信手段によって前記攪拌運転指令が受信された場合に、前記制御モードを前記攪拌制御モードに決定する請求項1~8のいずれか一項に記載の空気調和装置。 - 前記他の空気調和装置からの前記攪拌運転指令の受信可否を、予め前記攪拌指令受信手段に設定する操作部をさらに備える請求項9に記載の空気調和装置。
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